WO2018108039A1

WO2018108039A1 - Cycloid hydraulic motor

Info

Publication number: WO2018108039A1
Application number: PCT/CN2017/115327
Authority: WO
Inventors: 王志生
Original assignee: 镇江大力液压马达股份有限公司
Priority date: 2016-12-13
Filing date: 2017-12-08
Publication date: 2018-06-21

Abstract

A cycloid hydraulic motor, comprising a shell (10) having a mounting flange surface, an output shaft (11) mounted in the shell for torque output, a rotor-stator pair (13) fixedly connected to the shell by means of connecting bolt (12), a distribution system (14), and a flow channel and a rear cover (15) where oil liquid flows in and out of a cavity of the motor. By studying the overall layout structure of a cycloid hydraulic motor, a motor mounting positioning spigot round surface is provided in a shell so that the overall structure of the cycloid hydraulic motor is more compact, the motion is stable and reliable, the positional accuracy of the motor can also be ensured, the assembly and the maintainability thereof can be enhanced, and the part processing difficulty of the motor is decreased, thereby meeting customers' use requirements.

Description

Cycloid hydraulic motor

Related application

The present application claims the priority of the Chinese Patent Application No. 2016-1144517.3, entitled "A High Speed Distribution Cycloid Hydraulic Motor", which is hereby incorporated by reference in its entirety in The priority of the Chinese patent application entitled "A Cycloidal Hydraulic Motor", which is filed on Dec. 13, 2017, is hereby incorporated by reference in its entirety in The application No. 201710009159.3, entitled "A body-shell positioning high-speed distribution cycloid hydraulic motor with a front cover", the priority of which is hereby incorporated by reference in its entirety in its entirety in The priority of the Chinese Patent Application No. 201710009160.6, entitled "A Body-Sharing Positioning Shaft Cycloidal Hydraulic Motor with a Front Cover", is hereby incorporated by reference in its entirety in its entirety in its entirety in , the application number is 201611201729.0, the priority of the Chinese patent application entitled "A shaft valve distribution cycloidal hydraulic motor", the full text of which is hereby incorporated herein The priority of the Chinese patent application entitled "A large radial force support shaft distribution cycloidal hydraulic motor" is hereby incorporated by reference. .

Technical field

The invention relates to the technical field of hydraulic transmission, in particular to a cycloidal hydraulic motor which converts hydraulic energy into mechanical energy.

Background technique

The cycloidal hydraulic motor is a commonly used hydraulic drive device. It is a low-speed and high-torque motor. It has the advantages of small size, large unit power density, high efficiency, wide speed range, etc. It has been widely used, and it has been improved with the development of industry and agriculture. Will be more extensive.

The basic structure of such a device is that the body shell or the back cover is provided with a liquid inlet port and a return port, and one end is provided with a cycloidal pin wheel engagement pair and a flow distribution mechanism, and the flow distribution mechanism can be placed before or after the cycloid pin wheel meshing pair. Generally, the front valve (on the side of the body shell) is a shaft valve, and the rear side (the back cover side) is a plane distribution flow, and the other end is equipped with an output shaft. The rotor of the cycloidal pinion pair is meshed with the external gear at one end of the linkage shaft via an internal spline, and the other end of the linkage shaft is coupled to the output shaft. During operation, the flow distribution mechanism communicates the inlet port with the extended engagement cavity of the cycloidal pin wheel pair, and connects the contraction chamber of the cycloidal pin wheel pair with the return port. As a result, after the pressurized liquid enters the body shell or the back cover from the liquid inlet, it enters the extended meshing cavity formed by the meshing pin engagement pair, so that the volume thereof is continuously expanded, and the liquid in the contraction meshing chamber formed by the meshing pin engagement pair is Returning from the return port; during this process, the rotor of the cycloidal pinion pair is driven to rotate by the pressure difference between the extended meshing cavity and the contraction meshing cavity, and the rotation is transmitted to the output shaft output through the linkage shaft, thereby realizing the hydraulic energy direction. Conversion of mechanical energy. At the same time, the distribution mechanism is also rotated by the linkage shaft, and the switching state is continuously switched continuously, so that the conversion process can be continued. In this way, the motor can continuously output torque. It can be said that the cycloidal pinion pair and the flow distribution mechanism are the core of the hydraulic motor.

According to the applicant's understanding, the current high-speed distribution cycloidal hydraulic motor basically adopts the integral mounting flange structure. The Chinese patent document of the announcement number CN203685462U is a typical integral wheel mounting flange structure of Φ82.55, with typical The Φ82.55 stop of the SAE A type standard is only a different mounting surface, which will cause inconvenience in motor processing, assembly and maintenance and replacement.

Summary of the invention

Based on this, it is necessary to provide a cycloidal hydraulic motor that facilitates motor processing, assembly, maintenance and replacement, etc., for inconvenient problems such as motor processing, assembly, and maintenance and replacement.

The above objectives are achieved by the following embodiments:

A cycloidal hydraulic motor includes a body casing having a mounting flange face, an output shaft of a torque output disposed in the body casing, and a rotating stator pair and a distribution system fixed to the body casing by connecting bolts The fluid enters and exits the flow path and back cover of the motor cavity.

A cycloidal hydraulic motor comprising a body casing having a mounting flange surface, an output shaft structure of a torque output disposed in the body casing, and a rotating stator pair, a distribution system, and an oil fixed to the body casing by connecting bolts a flow passage and a rear cover of the liquid into and out of the inner cavity of the motor; the body casing has a mounting positioning opening, a front cover is disposed in the opening of the body casing, the front cover is provided with a rotating shaft seal, and the front cover is provided with a screw Attached to the body shell, the front cover has a partial screw cylinder mounting hole, the body shell has a partial screw cylinder mounting hole, and the cylindrical head mounting hole of the screw is covered by the front cover and the body The mounting holes on the casing are formed together.

A cycloidal hydraulic motor comprising a body casing having a mounting flange surface, an output shaft structure of a torque output disposed in the body casing, and a rotating stator pair, a distribution system, and an oil fixed to the body casing by connecting bolts a flow passage and a rear cover for the liquid to enter and exit the inner cavity of the motor; the body casing has a mounting positioning opening, a front cover is disposed in the opening of the body casing, and the output shaft shaft diameter is provided with front and rear supports, and the front and rear supports are The front needle bearing and the rear front needle bearing are provided with a thin wall retaining ring between the front and rear supports, and the front needle bearing body shell has a convex step at the mounting portion.

A cycloidal hydraulic motor comprising a body casing having a mounting flange surface, an output shaft structure of a torque output disposed in the body casing, and a rotating stator pair, a distribution system, and an oil fixed to the body casing by connecting bolts a flow passage and a rear cover for the liquid to enter and exit the inner cavity of the motor; the inner bore surface of the body shell and the output shaft has a flow distribution hole, and the output shaft has a shaft diameter of the distribution groove matched with the body shell distribution hole, the body shell The inner hole surface is completely meshed with the output shaft shaft diameter, the body shell is provided with a circular surface for mounting the positioning opening, a front cover is disposed in the opening of the body shell, and the front cover is provided with a rotating shaft seal, the front cover The outer circular surface and the body casing mounting hole are radially matched to the limit, the one end plane of the front cover is in contact with the step surface of the body shell hole, and the outer end of the body shell hole is provided with a ring hole, and the ring hole and the front cover plane form a facing inner cavity The cavity is fitted with an O-ring and an O-ring is installed for cavity sealing.

A cycloidal hydraulic motor comprising a body casing having a mounting flange surface, an output shaft structure of a torque output disposed in the body casing, and a rotating stator pair, a distribution system, and an oil fixed to the body casing by connecting bolts a flow passage and a rear cover for the liquid to enter and exit the inner cavity of the motor; the inner bore surface of the body shell and the output shaft has a distribution hole, and the output shaft has a shaft diameter of the distribution groove matched with the body shell distribution hole, the output shaft The front end is provided with a front support, the rear end of the inner hole surface of the body shell is provided with a rear support, the front support is a full complement cylindrical roller bearing, and the outer circumference of the support frame of the cylindrical roller bearing is installed in the inner hole of the body shell a roller inscribed circle of the cylindrical roller bearing is mounted on a shaft seal shaft diameter of the output shaft, and the support frame abuts against a bearing retaining ring installed in the stepped hole of the front cover by a plane bearing, The rear support is supported on a shaft diameter of a circular surface of the distribution groove of the output shaft.

A cycloidal hydraulic motor comprising a body casing having a mounting flange surface, an output shaft structure of a torque output disposed in the body casing, and a rotating stator pair, a distribution system, and an oil fixed to the body casing by connecting bolts a flow passage and a rear cover of the liquid into and out of the inner cavity of the motor; the body casing and the distribution hole of the output shaft together form a shaft valve, the output shaft is provided with two front and rear bearing supports, and the front bearing support is a roller bearing The rear bearing support is a needle bearing, and the distribution hole of the body casing and the two front and rear bearing support mounting holes are provided as one through hole.

After adopting the above technical solution, the beneficial effects of the present invention are:

In the cycloidal hydraulic motor of the invention, the output shaft is installed in the body shell, and the body shell is connected with the rotating stator pair, the distribution system and the back cover by connecting bolts, and the cycloid hydraulic motor is made through the research on the overall layout structure of the cycloidal hydraulic motor. Tight overall structure Together, the movement is stable and reliable, and the installation positioning stop is arranged on the body shell, which can ensure the positional accuracy of the motor, enhance the assembly and maintainability, and reduce the processing difficulty of the motor parts to meet the customer's needs.

DRAWINGS

In order to make the content of the present invention easier to understand, the present invention will be further described in detail below with reference to the accompanying drawings

1 is a cross-sectional structural view showing a cycloidal hydraulic motor according to a first embodiment of the present invention;

2 is a cross-sectional structural view showing a cycloidal hydraulic motor according to a second embodiment of the present invention;

3 is a cross-sectional structural view of a cycloidal hydraulic motor according to a third embodiment of the present invention;

4 is a cross-sectional structural view showing a cycloidal hydraulic motor according to a fourth embodiment of the present invention;

Figure 5 is a cross-sectional structural view showing a cycloidal hydraulic motor according to a fifth embodiment of the present invention;

Figure 6 is a cross-sectional structural view showing a cycloidal hydraulic motor according to a sixth embodiment of the present invention;

Figure 7 is a cross-sectional structural view showing a cycloidal hydraulic motor according to a seventh embodiment of the present invention;

Figure 8 is a cross-sectional structural view showing a cycloidal hydraulic motor according to Embodiment 8 and Embodiment 9 of the present invention;

Figure 9 is a schematic view showing an embodiment of a mounting surface of a front cover in the cycloidal hydraulic motor shown in the first embodiment and the third embodiment;

Figure 10 is a schematic view showing a partial mounting hole of a cylindrical head on the front cover shown in Figure 9;

Figure 11 is a schematic view showing another embodiment of the mounting surface of the front cover in the cycloidal hydraulic motor shown in the first embodiment and the third embodiment;

Figure 12 is a schematic view showing an embodiment of a mounting surface of a front cover in the cycloidal hydraulic motor shown in the second embodiment;

Figure 13 is a schematic view showing the partial mounting hole of the cylindrical head on the front cover shown in Figure 12;

Figure 14 is a schematic view showing another embodiment of the mounting surface of the front cover in the cycloidal hydraulic motor shown in the second embodiment;

Figure 15 is a schematic view showing a thin-walled retaining ring in the cycloidal hydraulic motor shown in the third embodiment;

16 is a schematic structural view showing an embodiment of a rotary stator of a cycloidal hydraulic motor according to Embodiments 4 to 9;

17 is a schematic structural view of another embodiment of a cycloidal hydraulic motor intermediate-rotating stator pair according to the fourth embodiment to the ninth embodiment;

18 is a schematic structural view of an embodiment of a front cover mounting surface of a cycloidal hydraulic motor according to Embodiment 4 to Embodiment 6 and Embodiment 8;

19 is a schematic structural view showing another embodiment of a front cover mounting surface of the cycloidal hydraulic motor shown in the seventh embodiment and the ninth embodiment;

Where: 10-body shell; 11-output shaft; 12-connection bolt; 13-turn stator pair; 131-stator; 132-rotor; 133-needle; 14-distribution system; 15-back cover; Seal; 17-front cover; 18-screw; 19-front support; 20-rear support; 21-bearing retaining ring; 22-plane bearing; 23-O-type seal ring; 24--thin wall retaining ring; ; 26 - valve ball; 27 - valve body; 28 - seal ring; 29 - spacer; 30 - linkage shaft.

detailed description

In order to make the objects, technical solutions and advantages of the present invention more comprehensible, the cycloid hydraulic motor of the present invention will be further described in detail below with reference to the accompanying drawings. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or There may also be centered components. When an element is considered to be "connected" to another element, it can be directly connected to the other element or. In contrast, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and the like, as used herein, are for illustrative purposes only.

1 to 8, a basic structure of a cycloidal hydraulic motor according to the present invention, in which the cycloidal hydraulic motor includes a body casing 10, an output shaft 11 of a torque output disposed in the body casing 10, and a body The casing 10 is provided with a rotating stator pair 13 fixed by a connecting bolt 12, a distribution system 14 and a flow passage and a rear cover 15 for the oil to enter and exit the inner cavity of the motor. The invention studies the overall structure of the cycloidal hydraulic motor, especially the large and medium-sized structure cycloidal hydraulic motor, so that the cycloid hydraulic motor has a compact overall structure, stable and reliable movement, and can also ensure the positional accuracy of the motor, enhance assembly and maintainability. Sex, reduce the difficulty of machining parts of motor parts to meet customer needs.

In an embodiment of the invention, the body casing 10 has a mounting positioning stop, and a front cover 17 is disposed in the mounting positioning stop of the body casing 10. In an embodiment of the invention, the front cover 17 is provided with a rotating shaft seal 16. In an embodiment of the present invention, the front cover 17 is fixedly coupled to the body casing 10 by screws 18. The front cover 17 has a cylindrical head mounting hole for a partial screw 18, and the body casing 10 has a cylindrical head mounting hole for a partial screw 18. The cylindrical head mounting hole of the screw 18 is formed by the mounting hole on the front cover 17 and the body casing 10.

In an embodiment of the invention, the output shaft 11 is provided with a front support 19 and a rear support 20 with a shaft diameter. In an embodiment of the invention, the front support 19 is located at the front end of the output shaft 11 and the rear support 20 is located at the rear end of the inner bore surface of the body casing 10. In an embodiment of the invention, the front support 19 and the rear support 20 are front needle bearings and rear needle bearings. In an embodiment of the invention, the front support 19 is a roller bearing. In an embodiment of the invention, the front support 19 is a full complement cylindrical roller bearing, and the outer circumference of the support frame of the cylindrical roller bearing is mounted on the inner bore surface of the body casing 10. In an embodiment of the invention, the roller inscribed circle of the cylindrical roller bearing is mounted on the mounting shaft seal shaft diameter of the output shaft 11, and the rear support 20 is supported on the shaft diameter of the circular groove of the distribution shaft 11 of the output shaft 11. In an embodiment of the invention, the rear support 20 is a needle bearing. In an embodiment of the invention, the rear support 20 is replaced by a composite bearing.

In an embodiment of the invention, a thin wall retaining ring 24 is disposed between the front support 19 and the rear support 20, and the front support 19 has a convex step at the inner hole mounting portion of the body casing 10.

In an embodiment of the invention, the motor is a small and medium-sized structural shaft distribution cycloidal hydraulic motor, and the body casing 10 and the distribution hole of the output shaft 11 together form a shaft valve, the distribution hole of the body casing 10 and the front support 19, The mounting hole of the support 20 is provided as a through hole.

In an embodiment of the invention, the inner bore surface of the body casing 10 that mates with the output shaft 11 has a distribution orifice, and the output shaft 11 has a shaft diameter of the distribution groove that matches the orifice of the body casing 10. In an embodiment of the invention, the inner bore surface of the body casing 10 is fully engaged with the shaft diameter of the output shaft 11, and the body casing 10 is provided with a circular surface for mounting the positioning stop. In an embodiment of the invention, the outer circular surface of the front cover 17 is radially engaged with the inner hole of the body casing 10, and the end surface of the front cover 17 is in contact with the inner surface step surface of the body casing 10.

In an embodiment of the present invention, the outer end of the inner hole of the body casing 10 has a ring hole, and the ring hole and the front cover 17 form a cavity facing the inner cavity and are mounted with an O-ring 23, and the O-ring 23 is used for the cavity. seal. In an embodiment of the invention, the one end plane of the front cover 17 is fixedly coupled to the body casing 10 by screws 18. In an embodiment of the invention, the bearing retaining ring 21 is disposed in the front cover 17 and the inner bore of the body casing 10. The outer ring of the bearing retaining ring 21 faces the front cover 17 and the body casing 10 for radial limitation. In an embodiment of the invention, the plane of the front cover 17 is axially restrained by the bearing retainer 21 and the planar bearing 22 against the shoulder of the output shaft 11.

In an embodiment of the invention, the support frame abuts against the bearing retaining ring 21 by means of a planar bearing 22. In the first aspect of the invention In the embodiment, one end of the bearing retainer 21 abuts against the shoulder of the output shaft 11 and the other end abuts against the front cover 17. In an embodiment of the invention, an O-ring is disposed between the front cover 17 and the body casing 10, the O-ring is located on the outer circular surface of the bearing retaining ring 21, and the bearing retaining ring 21 has a step near the front support 19. . In an embodiment of the invention, the ring aperture is located at the outer circumferential surface of the bearing retainer ring 21 at the shoulder of the output shaft 11.

In an embodiment of the invention, one end of the front cover 17 is a convex step. In an embodiment of the invention, the stepped circular surface is positioned in a clearance fit with the inner bore of the body casing 10. In an embodiment of the invention, one end of the step abuts the front support 19 on the output shaft 11. In an embodiment of the invention, a ring groove is formed in the inner hole of the body casing 10, and the O-ring 23 is mounted in the ring groove. In an embodiment of the invention, the front cover 17 is stepped with a ring groove, and the ring groove is provided with an O-ring 23 . In an embodiment of the invention, the front cover 17 is stepped by replacing the outer cover 17 with the outer ring of the bearing retaining ring 21 and the inner hole of the body casing 10. In an embodiment of the invention, the rotating shaft seal 16 disposed between the front cover 17 and the output shaft 11 is a skeleton shaft seal. In an embodiment of the invention, the step of the output shaft 11 abuts against the front supported cylindrical roller, and the step of the output shaft 11 limits the axial direction of the output shaft 11, and the support frame of the cylindrical roller bearing The output shaft 11 maintains a gap axially. In an embodiment of the invention, the front support 19 and the rear support 20 are needle bearings of the same mounting size, the front support 19 is located in the spline position in the output shaft 11, and the front support 19 and the rear support 20 are mounted in the body casing 10. The bearing holes are arranged front and rear, and the bearing holes are provided with front and rear needle bearing limit holes.

In an embodiment of the invention, the cylindrical roller bearing is comprised of a cylindrical roller and a support frame mounted in a machined recess of the support frame.

In an embodiment of the invention, the rear end of the output shaft 11 is arranged in a stepped shape, the composite bearing is mounted on the stepped round surface, and the composite bearing is tightly fitted with the stepped circular surface, and the rear support 20 disposed at the rear end of the inner hole surface of the body casing 10 is replaced. .

In an embodiment of the invention, the body casing 10 is provided with a one-way valve identical to the oil port, and the one-way valve is composed of an elastic body 25, a valve ball 26, a valve body 27, and a sealing ring 28, and the valve body 27 abuts against At one end of the partition 29, the partition 29 is provided with a passage for the valve body 27 to communicate with the motor cavity.

In an embodiment of the invention, the front cover 17 is nested in the circular face of the positioning opening of the body casing 10. In an embodiment of the invention, the outer circular surface of the front cover 17 serves as a mounting positioning stop for the motor. In an embodiment of the invention, the outer circular surface of the front cover 17 is replaced with a motor positioning stop as a mounting positioning stop of the motor housing 10 mounting flange end.

In an embodiment of the invention, the partial mounting hole of the cylindrical head of the front cover 17 exceeds half of the required mounting hole of the cylindrical head. In an embodiment of the invention, the cylindrical mounting portion of the front cover 17 has a partial mounting hole surface that exceeds the mounting hole of the screw 18. In an embodiment of the invention, the cylindrical mounting portion of the front cover 17 is machined by milling. In an embodiment of the invention, the mounting holes of the cylindrical head of the screw 18 are equally evenly distributed. In an embodiment of the invention, the mounting holes of the cylindrical head of the screw 18 are evenly spaced and replaced by 8 equal parts. In an embodiment of the invention, the mounting holes of the cylindrical head of the screw 18 are equally divided into odd-numbered uniforms. In an embodiment of the invention, the mounting holes of the cylindrical head of the screw 18 are equally divided into 7 equal parts. In an embodiment of the invention, the cylindrical head mounting hole of the screw 18 of the front cover 17 is a milled semicircular opening structure, and the cylindrical head of the screw 18 is completely mounted on the front cover 17.

In an embodiment of the invention, the thin-walled retaining ring 24 is of an open tubular shape with at least three openings. In an embodiment of the invention, the thin wall retaining ring 24 is formed by powder metallurgy process.

In an embodiment of the invention, the shaft of the output shaft 11 is coated with a DLC carbon-based composite film material. In an embodiment of the invention, the inner surface of the body shell 10 is coated with a DLC carbon-based composite film material.

The present invention provides a cycloidal hydraulic motor, thereby improving the positional accuracy of the motor stop having the front cover 17 and the reliability of the seal by the innovation of the front cover 17 and its sealing structure while improving the motor output shaft 11 and its bearing. Skeleton shaft seal The maintainability, enhance the assembly and maintainability of the bearing, and reduce the difficulty of machining the motor parts. Moreover, the cycloidal hydraulic motor of the present invention can also improve the positional accuracy of the motor stop having the front cover 17 by the innovation of the front cover 17 and its sealing structure, the reliability of the seal, the maintainability of the skeleton shaft seal, and the reinforced bearing. Assembly and maintainability, reducing the difficulty of machining the motor parts.

Optionally, the body casing 10 has a positioning and positioning opening. The front cover 17 is disposed in the opening of the body casing 10. The front cover 17 is provided with a rotating shaft seal 16, and the front cover 17 is fixedly connected to the body casing 10 by screws 18. The front cover 17 has a cylindrical head mounting hole for a partial screw 18, and the body casing 10 has a cylindrical head mounting hole for a partial screw 18. The cylindrical head mounting hole of the screw 18 is formed by the mounting hole on the front cover 17 and the body casing 10.

The invention provides a cycloidal hydraulic motor, which improves the installation of the motor bearing and the output shaft 11 through the innovation of the front cover 17 and its sealing structure, improves the positional accuracy of the motor stop having the front cover 17, and the reliability of the sealing, The maintainability of the skeleton shaft seal enhances the assembly disassembly and maintainability of the motor as a whole, and reduces the processing difficulty of the motor parts.

Optionally, the body casing 10 has a mounting positioning stop, and a front cover 17 is disposed in the mounting positioning stop of the body casing 10. The output shaft 11 is provided with a front support 19 and a rear support 20, and the front support 19 and the rear support 20 are front. The needle roller bearing and the rear front needle roller bearing are provided with a thin wall retaining ring 24 between the front and rear supports 20, and the front needle roller bearing body shell has a convex step at the 10 hole mounting portion.

The invention provides a cycloidal hydraulic motor, which increases the assembly and maintainability of the motor through the improvement of the structure, and improves the position accuracy and the installation strength of the motor with the front cover 17 through the innovation of the front cover 17 and its sealing structure. In general, the processing difficulty of the motor parts is reduced, so that the motor has the advantages of several conventional motors.

Optionally, the inner hole surface of the body shell 10 and the output shaft 11 has a distribution hole, the output shaft 11 has a shaft diameter of the distribution groove matched with the distribution hole of the body shell 10, and the inner diameter surface of the body shell 10 and the shaft diameter of the output shaft 11 Fully engaged, the body casing 10 is provided with a circular surface for mounting the positioning opening. The front cover 17 is disposed in the mounting positioning opening of the body casing 10. The front cover 17 is provided with a rotating shaft seal 16, and the outer circular surface of the front cover 17 is installed with the body casing 10. The hole is radially matched with the limit, the end surface of the front cover 17 is in contact with the step surface of the body shell 10, and the outer end of the body shell 10 is provided with a ring hole. The ring hole and the front cover 17 form a cavity facing the inner cavity and are mounted with an O-shaped hole. The seal ring 23 is mounted with an O-ring 23 for cavity sealing.

The invention provides a cycloidal hydraulic motor, which enhances the bearing capacity, self strength and reliability of the radial force supporting bearing, the structural innovation increases the assembly and maintainability of the motor, and through the innovation of the front cover 17 and its sealing structure, The accuracy and strength of the position of the nozzle with the motor of the front cover 17 are improved, and the processing difficulty of the motor parts is reduced as a whole.

Optionally, the inner hole surface of the body shell 10 and the output shaft 11 has a distribution hole, the output shaft 11 has a shaft diameter of the distribution groove matched with the distribution hole of the body shell 10, and the front end of the output shaft 11 is provided with a front support 19, and the body shell The rear end of the inner hole surface of the 10 is provided with a rear support 20, and the front support 19 is a full complement cylindrical roller bearing. The outer circumference of the support frame of the cylindrical roller bearing is mounted on the inner hole surface of the body shell 10, and the roller of the cylindrical roller bearing The inscribed circle is mounted on the mounting shaft seal shaft diameter of the output shaft 11, and the support frame abuts against the bearing retaining ring 21 installed in the stepped hole of the front cover 17 through the planar bearing 22, and the rear support 20 supports the distribution of the output shaft 11. The axial diameter of the groove surface.

The invention provides a cycloidal hydraulic motor, which can withstand greater radial force and axial force through bearing and its structural improvement under the premise of maintaining the existing installation dimensions, and proposes a processability and assemblability. Excellent maintainability, high positioning accuracy of the positioning of the mouth, and overall reliability. The shaft-fitted cycloidal hydraulic motor with compact structure of the front cover 17 meets the requirements of high requirements.

Optionally, the body casing 10 and the distribution hole of the output shaft 11 together form a shaft valve, and the output shaft 11 is provided with a front support and a rear support, respectively being a front bearing support and a rear bearing support, and the front bearing support is a roller bearing, and then The bearing support is a needle bearing, and the distribution hole of the body casing 10 and the two front and rear bearing support mounting holes are provided as one through hole.

The details are as follows:

Embodiment 1

The basic structure of a cycloidal hydraulic motor of the present invention is shown in Fig. 1. The present invention will be further described in detail below in conjunction with the above embodiment of Fig. 1. A high-speed distribution cycloid hydraulic motor of the embodiment has a SAE A-type standard Φ82.55 mounting stop, and the basic structure includes a body shell 10 having a mounting flange surface, and an output shaft 11 with a torque output disposed in the body casing 10 The body shell 10 is integrally connected by the rotating stator pair 13 and the rear cover 15 fixed by the connecting bolt 12, and the fluid passage into and out of the motor cavity forms a closed cavity; the body shell 10 The front end has a flange surface of the motor and a mounting and positioning stop of the motor, that is, a Φ82.55 mounting positioning stop or a mounting positioning stop close to the Φ82.55 size, and the positioning and positioning opening as a part of the body casing 10 can ensure The positional accuracy of the positioning stop is installed and the strength of the mounting positioning stop; at the same time, the front cover 17 is disposed in the mounting positioning stop of the body casing 10, and the front cover 17 is provided with a rotating shaft seal 16, and the front cover 17 is adopted. The screw 18 is integrally fixed with the body casing 10. The front cover 17 has a cylindrical head mounting hole for a partial screw 18, and the body casing 10 also has a partial screw 18 cylindrical head mounting hole, and the cylinder of the screw 18 The head mounting hole is formed on the front cover 17 and the body case 10 Together form the mounting holes.

As shown in FIG. 1, the rotating shaft seal 16 disposed between the front cover 17 and the output shaft 11 is a skeleton shaft seal, and the front support 19 and the rear support 20 are provided on the shoulder of the output shaft 11, and the front support 19 and The rear support 20 is a front and rear bearing, and the front and rear bearings adopt a front needle bearing and a rear needle bearing of the same mounting size, the length of the front needle bearing is greater than the length of the rear needle bearing, and the front needle bearing is at the output The inner spline position of the shaft 11 is set, the front and rear bearings are mounted on the front and rear bearing holes in the body casing 10, and the bearing holes are provided with front and rear needle bearing limit holes, front needle bearing and rear needle bearing They are mounted from the two directions of the body casing 10, respectively, so that the output shaft 11 can be mounted from the front end of the body casing 10 or the rear end of the body casing 10 when the motor is mounted. Preferably, the diameter of the front and rear needle bearing limiting holes is smaller than the diameter of the inner hole of the body casing 10.

The outer circumference of the front cover 17 is gap-fitted with the body shell hole of the body shell 10 (ie, the inner hole of the body shell 10). One end of the front cover 17 is disposed in a plane, and the plane of the front cover 17 passes through the screw. 18 is fixedly coupled to the body casing 10, the plane is axially restrained by the bearing retaining ring 21 and the plane bearing 22 against the shoulder of the output shaft 11, and the outer end of the body shell 10 is provided with a ring hole. The annular hole and the front cover 17 form a cavity facing the inside of the motor, and an O-ring 23 is mounted in the cavity for cavity sealing, and the O-ring 23 faces the outer circular surface of the bearing retaining ring 21, The O-ring 23 seals the internal cavity of the motor.

As shown in FIG. 9, the mounting hole of the cylindrical head of the screw 18 is composed of a cylindrical head partial mounting hole of the front cover 17 and a cylindrical head partial mounting hole on the mounting and positioning end of the body shell 10, and the body shell 10 is installed. The cylindrical head partial mounting hole on the positioning end is only for the cylindrical head mounting space of the screw 18, and the cylindrical head of the screw 18 abuts against the cylindrical head partial mounting hole of the front cover 17 and is integrally fixed with the body shell 10; The partial mounting hole of the cylindrical head of the front cover 17 is shown in the schematic diagram of the screw 18 hole structure on the front cover 17 of the front cover 17, and is formed by milling. The partial mounting holes are oddly distributed, for example, the partial mounting holes are 7 equal parts. The cloth can be replaced by a 9-part uniform cloth with a partial mounting hole. The partial mounting hole of the cylindrical head of the front cover 17 exceeds half of the required mounting hole of the cylindrical head, and the partial mounting hole surface of the cylindrical head of the front cover 17 exceeds the screw. The mounting holes of the 18 help the mounting of the screw 18 to be reliable.

As shown in FIG. 11, the mounting holes of the cylindrical head of the screw 18 are evenly distributed. For example, the partial mounting holes are equally divided into 6 equal parts, for example, the partial mounting holes are replaced by 8 equal divisions.

The test proves that the above embodiment is very cleverly solved by the conventional SAE A type standard Φ82.55 mounting opening or the non-standard mounting opening close to the Φ82.55 size, which adopts the outer circle positioning of the front cover 17, It simplifies the motor structure and enhances the assemblability and maintainability of the motor. In addition to the above embodiments, the present invention may have other embodiments. For example, the conventional cycloidal hydraulic motor uses an improvement in the outer circumference of the front cover 17, and the like. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Embodiment 2

The basic structure of a cycloidal hydraulic motor of the present invention is shown in Fig. 2. The present invention will be further described in detail below with reference to Fig. 2. A cycloidal hydraulic motor of the present embodiment has a SAE A-type standard Φ82.55 mounting stop, and the basic structure includes a body casing 10 having a mounting flange surface, and an output shaft 11 in which the torque output is disposed in the body casing 10 The body casing 10 is fixedly connected by a connecting bolt 12 to connect the rotating stator pair 13, the distribution system 14 and the rear cover 15 into one body, and the flow passage of the oil into and out of the motor cavity forms a closed cavity. The front end of the body casing 10 has a motor-mounted flange surface and a mounting and positioning stop of the motor, that is, a Φ82.55 mounting positioning stop or a mounting positioning stop close to the Φ82.55 size, and a positioning and positioning opening as a body shell The front cover 17 is disposed in the mounting positioning stop of the body casing 10, and the front cover 17 is provided with the rotating shaft seal 16, The front cover 17 is integrally fixed with the body shell 10 by screws 18, the front cover 17 has a cylindrical head mounting hole for a partial screw 18, and the body shell 10 also has a cylindrical head mounting hole for a partial screw 18, The cylindrical head mounting hole of the screw 18 is formed by the mounting hole on the front cover 17 and the body casing 10.

As shown in FIG. 12, the mounting hole of the cylindrical head of the screw 18 is composed of a partial mounting hole of the cylindrical head of the front cover 17 and a partial mounting hole of the cylindrical head on the mounting end of the body casing 10. The body casing 10 is mounted and positioned. The cylindrical head partial mounting hole on the mouth end is only for the cylindrical head mounting space of the screw 18, and the cylindrical head of the screw 18 abuts against the cylindrical head partial mounting hole of the front cover 17 and is integrally fixed with the body casing 10; The partial mounting hole of the cylindrical head of the front cover 17 is as shown in the schematic diagram of the screw hole 18 hole of the front cover 17 of the front cover 17, and is formed by milling, and the partial mounting holes are evenly distributed, for example, the partial mounting holes are equally distributed in 8 equal parts, or 6 is equally divided, the partial mounting hole of the cylindrical head of the front cover 17 exceeds half of the required mounting hole of the cylindrical head, and the partial mounting hole surface of the cylindrical head of the front cover 17 exceeds the mounting hole of the screw 18.

As shown in FIG. 14, the mounting holes of the cylindrical head of the screw 18 are oddly distributed, for example, the partial mounting holes are equally divided into 9 equal parts, for example, the partial mounting holes are replaced by 7 equal divisions.

As shown in FIG. 2, one end of the front cover 17 is provided as a convex step, and one end of the step abuts against a front bearing cylindrical roller bearing on the output shaft 11, and the stepped round surface is engaged with the inner hole of the body casing 10. In the clearance fit positioning, a ring groove is arranged in the hole of the body shell 10, and the O-ring 23 is mounted on the ring groove to seal the internal cavity of the motor. It can be understood that the front cylindrical roller bearing here is the front support 19.

The rotating shaft seal 16 disposed between the front cover 17 and the output shaft 11 is a skeleton shaft seal, the front support 19 is a cylindrical roller bearing, and the cylindrical roller bearing is composed of a cylindrical roller and a support frame, Cylindrical rollers are mounted in the machined grooves of the support frame which are carburized and quenched by low carbon alloy steel to form the support raceways of the cylindrical roller bearings.

The test proves that the above embodiment is very cleverly solved by the conventional SAE A type standard Φ82.55 mounting port or the non-standard mounting port close to the Φ82.55 size, which adopts the problem of the outer circumference of the front cover 17. In addition to the above-described embodiments, the present invention may have other embodiments, such as an improvement in the outer circumference of the front cover 17 using a conventional shaft-aligned cycloidal hydraulic motor, and the like. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Embodiment 3

A basic structure of a body shell 10 positioning high-speed distribution cycloidal hydraulic motor having a front cover 17 is shown in FIG. 3. The present invention will be further described in detail below with reference to FIG. A body shell 10 positioning high-speed distribution cycloid hydraulic motor having a front cover 17 of the present embodiment has a SAE A-type standard Φ82.55 mounting stop (or proximity), and includes a body shell 10 having a mounting flange surface. An output shaft 11 for torque output disposed in the body casing 10, and a connecting bolt with the body casing 10 12 a fixed stator stator 13 , a distribution system 14 and a flow passage and a rear cover 15 for the oil to enter and exit the motor inner cavity; the body shell 10 has a mounting positioning stop, and the body casing 10 is mounted and positioned to have a round face A front cover 17 is disposed therein, and the output shaft 11 is provided with a front support 19 and a rear support 20, and the front support 19 and the rear support 20 are a front needle bearing and a rear front needle bearing, and the front and rear support 20 A thin wall retaining ring 24 is disposed therebetween, and the inner diameter of the body casing 10 has a convex step at the front end of the mounting portion of the front needle bearing, and the step can axially limit the front needle bearing body.

The outer circular surface of the front cover 17 and the mounting hole of the body casing 10 are radially constrained by a clearance fit. One end of the front cover 17 is a plane, and the plane is fixedly connected to the body shell 10 by screws 18 . The plane abuts against the shoulder of the output shaft 11 through the bearing bearing retaining ring 21 and the plane bearing 22, and axially limits the output shaft 11; the front needle bearing body mounting hole of the body shell 10 is provided at the outer end of the convex step a ring hole, the ring hole and the front cover 17 plane form a cavity facing the inner cavity and the O-ring 23 is installed, and the O-ring 23 is installed for cavity sealing, and the convex step is ingeniously solved. The space for the cavity-sealed O-ring 23 is provided by the effective thread pitch of the screw 18, and at the same time, the output shaft 11 is rotated and sealed with a reasonable space of Φ35, Φ38.1 shaft diameter, and the torque transmission part of the output shaft 11 Effective wall thickness.

The rotating shaft seal 16 disposed between the front cover 17 and the output shaft 11 is a skeleton shaft seal, and the front cover 17 is fixedly coupled to the body shell 10 by screws 18, as shown in FIG. There is a cylindrical head mounting hole having a partial screw 18 on the body casing 10, and the body shell 10 also has a cylindrical head mounting hole of a partial screw 18, and the cylindrical head mounting hole of the screw 18 is mounted on the front cover 17 and the body casing 10. The holes are formed together, so that the Φ82.55 mounting positioning stop of the SAE A type standard can be skillfully set, and the outer circular surface of the front cover 17 is solved as a shortage of the installation positioning stop.

It can be understood that the front needle bearing is the front support 19 and the rear needle bearing is the rear support 20. The front needle bearing and the rear needle bearing are successively mounted from the rear end direction of the body casing 10, and the thin wall retaining ring 24 disposed between the front support 19 and the needle bearing of the rear support 20 is an open tubular shape. As shown in FIG. 15, the opening of the thin-walled retaining ring 24 is designed at least three places, and the thin-walled retaining ring 24 is formed by a powder metallurgy process, which reduces the weight of the motor and reduces the cost of parts.

The arrangement of the front cover 17 of the present invention solves the problem caused by the one-way installation of the output shaft 11 without the front cover 17 structure, so that it can be bidirectionally mounted from both ends of the body casing 10, and the rotary shaft seal is solved. 16 installation and maintenance problems.

The test proves that the above embodiment is very cleverly solved by the conventional SAE A type standard Φ82.55 mounting opening or the non-standard mounting opening close to the Φ82.55 size, which adopts the outer circle positioning of the front cover 17, The ingenious design of the body casing 10 with the front cover 17 simplifies the motor structure and enhances the assemblability of the motor and its maintainability. In addition to the above-described embodiments, the invention may have other embodiments, such as improvements in the radial positioning of the front cover 17 in different ways, and the like. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Embodiment 4

The basic configuration of a body casing 10 positioning shaft distribution cycloid hydraulic motor having a front cover 17 of the present embodiment is shown in FIG. 4, and the present invention will be described in detail below with reference to FIG. A body casing 10 positioning shaft distribution cycloid hydraulic motor having a front cover 17 of the present embodiment has a SAE A type standard Φ82.55 mounting opening or a proximity mounting opening, and the basic structure includes a body having a mounting flange surface. The casing 10, the output shaft 11 of the torque output disposed in the body casing 10, and the rotating stator pair 13 fixed to the body casing 10 by the connecting bolt 12, the flow distribution system, and the flow passage of the oil into and out of the motor cavity and the rear The cover 15 is formed with different cavities, the inner bore surface of the body shell 10 matching the output shaft 11 has a flow channel, and the output shaft 11 has a shaft diameter of a distribution groove matched with the flow channel of the body shell 10, The inner hole surface of the body shell 10 is completely meshed with the shaft diameter of the output shaft 11 to form a motion pair similar to a sliding bearing. The mounting surface of the body shell 10 is provided with a motor mounting positioning stop circular surface, and the motor is installed as a hydraulic component in the application. On the machine, a separate front cover 17 is disposed in the mounting and positioning opening of the body casing 10. The front cover 17 is provided with a rotating shaft seal 16, and the outer circular surface of the front cover 17 and the mounting hole of the body casing 10 are used for the diameter. Matching limit, front cover One end of the body 17 is a flat surface, and the plane is in contact with the hole step surface of the body shell 10. The outer end of the hole step surface of the body shell 10 is provided with a ring hole, and the ring hole and the front cover 17 form a cavity facing the inner cavity. The O-ring 23 is installed for inner cavity sealing, and an O-ring 23 is installed in the cavity for sealing.

The front cover 17 abuts against the bearing retaining ring 21 via a planar bearing 22, one end of the bearing retaining ring 21 abuts against the shoulder of the output shaft 11, and the other end abuts against the front cover 17, for the motor output shaft 11 The axial displacement is limited and the motor output shaft 11 can withstand an axial force in the forward direction.

The output shaft 11 is coated with a DLC carbon-based composite film material, or the inner surface of the body shell 10 is coated with a DLC carbon-based composite film material, which helps to improve the meshing performance of the motor friction pair and reduce the friction coefficient. It helps to remove the contaminated particles from the oil and contributes to the overall life of the motor.

The body casing 10 may be provided with a one-way valve communicating with the oil port. The one-way valve is composed of an elastic body 25, a valve ball 26, a valve body 27 and a sealing ring 28, and the valve body 27 abuts against the partition plate. At one end of the 29, the partition 29 is provided with a passage for the valve body 27 to communicate with the motor cavity to form a one-way hydraulic oil passage.

A one-way valve disposed on the body casing 10 in communication with the oil port may be disposed at the front cover 17, corresponding to the position of the screw 18.

As shown in Fig. 16, the rotating stator pair 13 is a column-type rotating stator pair 13, and is composed of a stator 131, a rotor 132, and pin teeth 133. The rotating stator pair 13 can adopt an integral rotating stator pair 13 as shown in FIG. 17, and is composed of a stator 131 and a rotor 132, and at the same time, it is necessary to adapt the components connected thereto.

Figure 18 is a view showing a mounting surface of the front cover 17 in the embodiment of Figure 4, and it can be seen that the front cover 17 is nested in the circular face of the positioning opening of the body casing 10, as shown in Figure 13, the cylindrical head of the screw 18 of the front cover 17. The mounting hole is a semi-circular opening structure for milling, and the cylindrical head of the screw 18 is completely installed on the front cover 17, and the cylindrical head mounting hole of the screw 18 is evenly distributed equally, or replaced by an even-numbered uniform cloth, and the front cover 17 is ingeniously replaced. The design ensures reliable installation of the motor positioning stop.

It has been proved that the body casing 10 with the front cover 17 of the present embodiment has a positioning shaft distribution flow line hydraulic motor, and the positioning stop of the shaft distribution cycloid hydraulic motor having the structure of the front cover 17 is arranged on the body casing 10, The elimination of the outer circular surface of the front cover 17 as a positioning stop surface can not meet the requirements of high precision, and achieves the same function as the positioning stop, and the through hole structure of the inner surface of the body shell 10 has a very good The processing technology, but the deep blind hole processing of the integral body shell 10 is eliminated, the product of the invention has many advantages, the processing precision of the parts is easy to control, the assembly process is good, the maintenance process is good, the reliability is high, and the structure is compact. Therefore, the product's cost performance and adaptability to use conditions are improved.

Other than the above-described embodiments, the present invention may have other embodiments. For example, different front cover 17 structural deformations and the like are employed. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Embodiment 5

The basic structure of a shaft valve distribution cycloidal hydraulic motor of this embodiment is shown in Fig. 5. The present invention will be described in detail below with reference to Fig. 5. A shaft valve distribution cycloidal hydraulic motor of the embodiment has a SAE A type standard Φ82.55 mounting stop or a proximity mounting stop, and the basic structure includes a body shell 10 having a mounting flange surface, and is disposed on the body shell 10 The output shaft 11 of the inner torque output, and the rotating stator pair 13 fixedly connected with the body casing 10 by the connecting bolt 12, the flow distribution system, and the flow passage and the rear cover 15 of the oil inlet and outlet of the motor cavity form different cavities. The inner bore surface of the body shell 10 and the output shaft 11 has a flow channel, the output shaft 11 has a shaft diameter of a distribution groove matched with the body bore 10, and the output shaft 11 is adjacent to the front cover 17. The front end is provided with a front support 19, and the rear end of the inner bore surface of the body shell 10 is provided with a rear support 20, which is a full complement cylindrical roller bearing, which is supported by a cylindrical roller and a support a frame assembly, the support frame is formed by mechanical grinding after heat treatment, the front support 19 bears a main radial force on the output shaft 11, and the outer circumference of the support frame of the cylindrical roller bearing is mounted on the body shell 10 On the inner bore surface, the cylindrical roller bearing has an inscribed roller Output shaft The mounting shaft of the rotating shaft seal 16 is mounted on the bearing ring 21 mounted in the stepped hole of the front cover 17 by the planar bearing 22, and the rear support 20 supports the distribution groove of the output shaft 11. The rear support 20 assumes a secondary radial force on the output shaft 11 on the axial axis of the circular face.

The rear support 20 is a needle bearing structure, or a composite bearing is used instead of the needle bearing structure.

When the output shaft 11 is mounted, the front support 19 is first installed in the shaft hole of the body casing 10, the rear support 20 is installed in the mounting hole of the body casing 10, and the front end shaft of the output shaft 11 is sealed from the shaft end. The rear end of the casing 10 is installed, and the disassembly of the output shaft 11 of the motor is also taken out from the front end of the front end of the body casing 10. It can be seen that the conventional output requires the installation of the output shaft 11 and then a support or a new one. Supporting and retrieving the output shaft 11 has great advantages and can ensure the accuracy of the parts.

The body casing 10 has a mounting positioning opening, and a front cover 17 is disposed in the mounting positioning opening of the body casing 10. The front cover 17 is provided with a rotating shaft seal 16, and one end of the front cover 17 is convex. Steps, the stepped round surface is gap-fitted with the inner hole of the body casing 10, the front cover 17 is stepped with a ring groove, the ring groove is mounted with an O-ring 23, and the front cover 17 has a partial screw 18 cylinder a head mounting hole having a cylindrical head mounting hole for a partial screw 18, the cylindrical head mounting hole of the screw 18 being formed by a mounting hole on the front cover 17 and the body casing 10, the front cover 17 The body 18 is fixedly attached by screws 18. The front cover 17 of the present invention is only a unidirectional axial force that is received by the motor output shaft 11, and the load bearing capacity can be increased by increasing the number of the screws 18, while the large radial force through the output shaft 11 of the motor passes through the front support 19 and rear. The cooperation of the support 20 unloads the large radial force on the body casing 10 of the motor, and the mounting positioning stop provided on the body casing 10 of the motor is unloaded by the fixing device, so that the requirements of the front cover 17 are greatly reduced, thereby The invention solves the problem that the conventional positioning nozzle is disposed on the front cover 17 to form a radial force and an axial force, and the sealing of the shaft seal, the machining precision of each mating surface and the fastening requirement of the screw 18 Very harsh, it is easy to cause the shaft seal to leak oil, the front cover 17 is loose, and the reliability of the motor is reduced.

19 is a view showing a mounting surface of the front cover 17 in the embodiment of FIG. 1. It can be seen that the front cover 17 is nested in the circular shape of the positioning opening of the body casing 10. The front cover 17 has a partial screw 18 and is mounted on the cylindrical head. a hole, the body casing 10 has a cylindrical head mounting hole with a partial screw 18, and the cylindrical head mounting hole of the screw 18 is formed by a mounting hole on the front cover 17 and the body casing 10, and the front cover 17 is screwed. 18 is firmly connected with the body shell 10, and the ingenious design of the front cover 17 ensures reliable installation of the motor positioning stop, and the partial screw 18 cylindrical head mounting hole ensures the strength and reliability of the original positioning of the body shell 10 .

The body casing 10 may be provided with a check valve identical to the oil port. The one-way valve is composed of an elastic body 25, a valve ball 26, a valve body 27 and a sealing ring 28, and the valve body 27 abuts against the partition plate. At one end of the 29, the partition 29 is provided with a passage for the valve body 27 to communicate with the motor cavity.

Embodiment 6

The basic structure of a shaft valve distribution cycloidal hydraulic motor of the present embodiment is shown in Fig. 6. The present invention is further described in detail below in conjunction with the embodiment of Fig. 5 described above. The front cover 17 is replaced by the outer cover of the bearing ring 21 and the inner hole of the body casing 10 to replace the front cover 17 of the fifth embodiment, or the outer ring of the front cover 17 and the inner ring of the body cover are replaced. The outer end of the body shell 10 is provided with a ring hole. The ring hole forms a cavity facing the inner cavity with the front cover 17 and is mounted with an O-ring 23, and an O-ring 23 is mounted for cavity sealing.

A rear support 20 is disposed at a rear end of the inner bore surface of the body casing 10, and the rear support 20 is a composite bearing.

18 is a view showing a mounting surface of the front cover 17 in the embodiment of FIG. 6. It can be seen that the front cover 17 is nested in the circular shape of the positioning opening of the body casing 10. The cylindrical head mounting hole of the screw 18 of the front cover 17 is for milling. The semi-circular opening structure and the ingenious design of the front cover 17 ensure reliable installation of the motor positioning stop.

Example 7

The basic structure of a shaft valve distribution cycloidal hydraulic motor of the present embodiment is shown in Fig. 7. The present invention will be further described in detail below in conjunction with the above embodiment of Fig. 5. The rear end of the output shaft 11 is arranged in a step shape, and the stepped round surface is mounted with a composite bearing, and the composite bearing is tightly matched with the step round surface.

Embodiment 5, Embodiment 6 and Embodiment 7 both adopt two check valves to communicate with the inlet and outlet ports, which is beneficial to protect the rotating shaft seal 16; if a high-pressure rotary shaft seal 16 is used, the suitable working conditions can also save two. A one-way valve may also be provided on the body casing 10 at the front cover 17.

The practice proves that the shaft valve distribution cycloid hydraulic motor of the embodiment has many advantages, the part processing precision is moderate, the assembly process is good, the maintenance process is good, the reliability is high, the structure is compact, and the large diameter can be withstood. The force, which improves the product's cost performance and adaptability to use conditions.

Example eight

A basic configuration of a large radial force support shaft distribution cycloidal hydraulic motor of the present embodiment is shown in Fig. 8. The present invention will be described in detail below with reference to Fig. 8. A large radial force support shaft distribution cycloidal hydraulic motor of the embodiment has a SAE A type standard Φ82.55 mounting stop or a close-size mounting stop, and has a body shell 10 with a mounting flange surface, and is disposed in the body shell The output shaft 11 of the torque output in 10, and the rotating stator pair 13 fixedly connected to the body casing 10 by the connecting bolt 12, the flow distribution system, and the flow passage and the rear cover 15 of the oil entering and exiting the motor cavity pass through the high and low pressure oil The flow of liquid into and out of the motor cavity to the stator pair 13 generates torque, and the torque is transmitted to the output shaft 11 through the linkage shaft 30, and the torque is transmitted to the external device via the shaft extension of the output shaft 11 to move the drive. In the present embodiment, the body casing 10 and the distribution channel of the output shaft 11 together form a shaft valve, and the output shaft 11 is provided with two front and rear supports 20. It can be understood that the front support 19 and the rear support 20 are respectively a front bearing support and a rear bearing support, and the front bearing support 19 is a roller bearing, and the installation position is close to the front cover 17, and plays a role of bearing the axial extension of the output shaft 11. Radial force, the rear bearing support 20 is a needle bearing, which bears a secondary radial force of the shaft extension of the output shaft 11, and the distribution hole of the body casing 10 and the two front and rear bearing support mounting holes are provided as one through hole, the same The arrangement of the size through holes can effectively improve the high precision ensuring ability and efficiency of the machining. The front bearing support 19 is a full complement cylindrical roller bearing, and the outer circumference of the support frame of the cylindrical roller bearing is mounted on the through hole of the body casing 10. On the circular surface, the inscribed circle of the cylindrical roller bearing is mounted on the stepped shaft diameter of the output shaft 11, and the step of the output shaft 11 abuts against the cylindrical roller of the front bearing support 19, and the output can be output The shaft 11 is axially constrained, and the step of the output shaft 11 limits the output shaft 11 in the forward direction (the direction of the front cover 17), and the support frame of the front bearing support 19 and the output shaft 11 are always axially maintained. Clearance, the front bearing supports 19 cylindrical roller bearings The other end surface of the support frame abuts against the bearing retaining ring 21, and the other end of the bearing retaining ring 21 abuts against the front cover 17, because the radial bearing force of the front bearing support 19 is strong, so that the output shaft 11 can withstand The large axial force also avoids the application of the traditional axial bearing 22 to the axial force, which improves the reliability of the product.

The bearing retaining ring 21 is disposed in the front cover 17 and in the stepped hole of the body casing 10. The front cover 17 axially limits the bearing retaining ring 21, and at the same time, the bearing retaining ring 21 needs to ensure sufficient shaft seal in the diameter direction. The installation space, the outer circumference of the bearing retaining ring 21 is limited in the radial direction facing the front cover 17 and the body casing 10.

An O-ring 23 is disposed between the front cover 17 and the body casing 10, and the O-ring 23 is located at the bearing retaining ring 21 On the outer circular surface, the bearing retaining ring 21 has a small step near the front bearing support to prevent interference with the stepped hole of the body casing 10.

The one-way valve position on the body casing 10 that is in communication with the oil port can be replaced at a suitable position on the body casing 10 at the front cover 17.

18 is a view showing a mounting surface of the front cover 17 in the embodiment of FIG. 8. It can be seen that the front cover 17 is nested in the circular surface of the flange of the body casing 10, and the outer circular surface of the front cover 17 is installed as the motor front cover 17. The front cover 17 is integrally fixed to the body case 10 by a plurality of screws 18 .

Example nine

This embodiment is a structure in which the front cover 17 of FIG. 8 is replaced by the structure of FIG. 19, FIG. 19 is a front view of the front cover 17 of the embodiment 9, and FIG. 13 is a schematic view of the front cover 17 of FIG. It is seen that the front cover 17 is nested in the circular shape of the positioning opening of the body casing 10. The mounting flange end of the body casing 10 is provided with a motor positioning stop, and the front cover 17 is disposed in the mouth of the body casing 10. The cover 17 is provided with a rotary shaft seal 16. The cylindrical head mounting hole of the screw 18 of the front cover 17 is a milled semicircular opening structure, and the cylindrical head of the screw 18 is completely mounted on the front cover 17, and the ingenious design of the front cover 17 ensures reliable mounting of the motor positioning port.

It has been proved that the improved motor of the present invention has a simpler and more reliable structure than the prior art cycloidal motor, and the axial force bearing capability of the motor shaft extension is stronger, the through hole processing technology is good, and the positioning is installed. The high accuracy, high strength and reliability of the mouth further enhance the reliability and user value of the product.

The technical features of the above-described embodiments may be arbitrarily combined. For the sake of brevity of description, all possible combinations of the technical features in the above embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be considered as the scope of this manual.

The above-described embodiments are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention. It should be noted that a number of variations and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be determined by the appended claims.

Claims

A cycloidal hydraulic motor, comprising: a body casing having a mounting flange surface, an output shaft of a torque output disposed in the body casing, and a rotating stator pair fixed to the body casing by a connecting bolt , the distribution system and the flow path and back cover of the oil into and out of the motor cavity.
The cycloidal hydraulic motor according to claim 1, wherein the body casing has a mounting positioning stop, and a front cover is disposed in the mounting positioning stop of the body casing.
A cycloidal hydraulic motor according to claim 2, wherein said front cover is provided with a rotary shaft seal.
A cycloidal hydraulic motor according to claim 3, wherein said front cover is fixedly coupled to said body casing by a screw, said front cover having a partial screw cylindrical mounting hole, said body The housing has a partial screw cylinder mounting hole, and the cylindrical head mounting hole of the screw is formed by the mounting hole on the front cover and the body casing.
The cycloidal hydraulic motor according to any one of claims 1 to 4, characterized in that the output shaft shaft diameter is provided with a front support and a rear support.
A cycloidal hydraulic motor according to claim 5, wherein said front support is located at a front end of said output shaft, and said rear support is located at a rear end of said inner bore surface of said body casing.
A cycloidal hydraulic motor according to claim 5 or claim 6, wherein said front support and rear support are a front needle bearing and a rear needle bearing.
A cycloidal hydraulic motor according to claim 5 or 6, wherein said front support is a roller bearing.
A cycloid hydraulic motor according to claim 5, 6 or 8, wherein said front support is a full complement cylindrical roller bearing, and said outer circumference of said cylindrical roller bearing is mounted on said body casing Inner hole surface.
The cycloid hydraulic motor according to claim 8, wherein a roller inscribed circle of said cylindrical roller bearing is mounted on a shaft seal shaft diameter of said output shaft, said rear support being supported by said The shaft diameter of the circular surface of the distribution groove of the output shaft.
A cycloidal hydraulic motor according to any one of claims 8 to 10, wherein the rear support is a needle bearing.
A cycloidal hydraulic motor according to claim 11 wherein said rear support is replaced by a composite bearing.
The cycloidal hydraulic motor according to any one of claims 5 to 12, wherein the inner bore surface of the body casing and the output shaft has a flow orifice, and the output shaft has a flow distribution with the body shell. The shaft diameter of the matching groove of the tunnel.
A cycloidal hydraulic motor according to claim 9, 10 or 13, wherein said body casing and said distribution shaft of said output shaft together form a shaft fitting valve, said body orifice of said body casing and said front The mounting hole of the support and the rear support is provided as a through hole.
The cycloidal hydraulic motor according to any one of claims 5 to 7, wherein a thin wall retaining ring is disposed between the front support and the rear support, and the front support is installed in the inner hole of the body casing. There are raised steps.
The cycloidal hydraulic motor according to claim 3, wherein the inner bore surface of the body casing is fully engaged with the shaft diameter of the output shaft, and the body shell is provided with a circular surface for mounting a positioning stop.
The cycloidal hydraulic motor according to any one of claims 4 to 16, wherein the outer surface of the front cover is radially matched with the inner hole of the body casing, and the front cover end plane is The inner hole of the body shell is in step contact.
The cycloidal hydraulic motor according to claim 17, wherein the outer end of the inner hole of the body casing has a ring hole, and the ring hole forms a cavity facing the inner cavity with the front cover plane and is mounted with an O-ring. The ring, the O-ring seals the cavity.
A cycloidal hydraulic motor according to claim 4, 17 or 18, wherein one end plane of said front cover is fixedly coupled to said body casing by said screw.
A cycloidal hydraulic motor according to claim 10 or 14, wherein a bearing retaining ring is disposed in said front cover and said inner casing inner hole, said outer ring of said bearing retaining ring facing said front cover Radial limiting with the body shell.
A cycloidal hydraulic motor according to claim 18 or claim 19, wherein the plane of the front cover is axially restrained by the bearing retaining ring and the planar bearing against the shoulder of the output shaft.
A cycloidal hydraulic motor according to any one of claims 9, 10, 11, 12, 13, 14, 20 and 21, wherein the support frame abuts against the bearing retaining ring by a planar bearing.
A cycloidal hydraulic motor according to claim 21 or 22, wherein the other end of the bearing retainer abuts against the front cover.
The cycloidal hydraulic motor according to claim 20, wherein an O-ring is disposed between the front cover and the body casing, and the O-ring is located on an outer circumference of the bearing retaining ring. The bearing retainer has a step near the front support.
A cycloidal hydraulic motor according to claim 21, wherein said ring hole is located at an outer circumferential surface of said bearing retainer at a shoulder of the output shaft.
The cycloidal hydraulic motor according to any one of claims 4, 5, 8 and 22, wherein one end of the front cover is a convex step.
The cycloidal hydraulic motor according to claim 26, wherein the stepped circular surface is positioned in a clearance fit with the inner bore of the body casing.
A cycloidal hydraulic motor according to any one of claims 26, wherein one end of said step abuts against a front support on said output shaft.
The cycloidal hydraulic motor according to claim 28, wherein a ring groove is provided in the inner hole of the body casing, and the ring groove is provided with an O-ring.
A cycloidal hydraulic motor according to claim 26, wherein said front cover step is provided with an annular groove, and said annular groove is provided with an O-ring.
A cycloidal hydraulic motor according to claim 18 or 30, wherein said front cover is positionally replaced by said outer ring of said bearing retaining ring and said inner bore of said body casing.
The cycloid hydraulic motor according to any one of claims 17, 18, 19, 21 and 29, wherein said rotary shaft seal disposed between said front cover and said output shaft is a skeleton shaft seal .
A cycloidal hydraulic motor according to claim 13, wherein a step of said output shaft abuts against said front supported cylindrical roller, and said step of said output shaft limits an axial direction of said output shaft The support frame of the cylindrical roller bearing maintains a gap axially with the output shaft.
The cycloidal hydraulic motor according to claim 5 or 25, wherein the front support and the rear support are needle bearings of the same mounting size, and the front support is located at a spline position in the output shaft. The front and rear supports are mounted on the bearing holes disposed in the front and rear of the body casing, and the bearing holes are provided with front and rear needle bearing limit holes.
A cycloidal hydraulic motor according to claim 32, wherein said cylindrical roller bearing is made of a cylindrical roller Composed of a support frame, the cylindrical roller is mounted in a machined groove of the support frame.
The cycloidal hydraulic motor according to claim 31, wherein a rear end of the output shaft is provided in a stepped shape, the stepped round surface is mounted with a composite bearing, and the composite bearing is tightly fitted with the stepped round surface. Replacing the rear support provided at the rear end of the inner bore surface of the body shell.
The cycloidal hydraulic motor according to claim 36, wherein the body casing is provided with a one-way valve identical to the oil port, and the one-way valve is composed of an elastic body, a valve ball, a valve body, and a sealing ring. The valve body abuts against one end of the spacer, the spacer providing a passage for the valve body to communicate with the motor cavity.
A cycloidal hydraulic motor according to claim 23 or 24, wherein said front cover is nested in a circular surface of said positioning opening of said body casing.
The cycloidal hydraulic motor according to claim 38, wherein the outer circular surface of the front cover serves as a mounting positioning stop of the motor.
The cycloidal hydraulic motor according to claim 39, wherein the outer circular surface of the front cover is replaced with a motor positioning stop at the body mounting flange end as a mounting positioning stop of the motor.
A cycloidal hydraulic motor according to claim 34 or claim 35, wherein the cylindrical head partial mounting hole of the front cover exceeds half of the required mounting hole of the cylindrical head.
The cycloidal hydraulic motor according to claim 41, wherein the cylindrical head portion of the front cover has a mounting hole surface that exceeds a mounting hole of the screw.
A cycloidal hydraulic motor according to claim 40 or claim 42, wherein the cylindrical mounting portion of the front cover is machined by milling.
The cycloidal hydraulic motor according to claim 43, wherein the mounting hole of the cylindrical head of the screw is equally divided evenly.
A cycloidal hydraulic motor according to claim 44, wherein the mounting hole of the cylindrical head of the screw is evenly distributed to be equally divided into eight equal parts.
The cycloidal hydraulic motor according to claim 43, wherein the mounting hole of the cylindrical head of the screw is equally divided into odd-numbered uniforms.
The cycloidal hydraulic motor according to claim 46, wherein the mounting hole of the cylindrical head of the screw is equally divided into seven.
A cycloidal hydraulic motor according to claim 46, wherein the cylindrical head mounting hole of the screw of the front cover is a milled semicircular opening structure, and the cylindrical head of the screw is completely mounted on the front cover.
The cycloidal hydraulic motor according to claim 15, wherein said thin-walled retaining ring is an open tubular shape, and said opening has at least three places.
A cycloidal hydraulic motor according to claim 49, wherein said thin-walled retaining ring is formed by a powder metallurgy process.
A cycloidal hydraulic motor according to claims 23, 46, wherein said output shaft shaft diameter is coated with a DLC carbon-based composite film material.
A cycloidal hydraulic motor according to claim 51, wherein said inner bore surface of said body shell is coated with a DLC carbon-based composite film material.
A cycloidal hydraulic motor, comprising: a body shell having a mounting flange surface, an output shaft structure of a torque output disposed in the body shell, and a rotating stator pair fixed to the body shell by a connecting bolt, Distribution system and oil in and out a flow passage and a rear cover of the inner cavity of the motor; the body casing has a mounting positioning opening, a front cover is disposed in the opening of the body casing, the front cover is provided with a rotating shaft seal, and the front cover is provided with a screw and a body The shell is fixedly connected, the front cover has a partial screw cylinder mounting hole, and the body shell has a partial screw cylinder mounting hole, and the cylindrical head mounting hole of the screw is provided on the front cover and the body shell The mounting holes are formed together.
A cycloidal hydraulic motor, comprising: a body shell having a mounting flange surface, an output shaft structure of a torque output disposed in the body shell, and a rotating stator pair fixed to the body shell by a connecting bolt, a flow distribution system and a flow passage and a rear cover for the oil to enter and exit the inner cavity of the motor; the body casing has a mounting positioning stop, a front cover is disposed in the opening of the body casing, and the output shaft shaft diameter is arranged to support the front and rear The front and rear supports are a front needle bearing and a rear front needle bearing, and a thin wall retaining ring is disposed between the front and rear supports, and the front needle bearing body shell hole has a convex step at the mounting portion.
A cycloidal hydraulic motor, comprising: a body shell having a mounting flange surface, an output shaft structure of a torque output disposed in the body shell, and a rotating stator pair fixed to the body shell by a connecting bolt, a flow distribution system and a flow passage and a rear cover for the oil to enter and exit the inner cavity of the motor; the inner bore surface of the body shell and the output shaft has a flow distribution hole, and the output shaft has a shaft diameter of the distribution groove matched with the body flow distribution hole, The inner hole surface of the body shell is completely meshed with the shaft diameter of the output shaft, the body shell is provided with a circular surface for mounting the positioning end, a front cover is disposed in the mouth of the body shell, and the front cover is provided with a rotating shaft seal. The outer surface of the front cover is radially matched with the body mounting hole, and the end surface of the front cover is in contact with the step surface of the body shell, and the outer end of the body shell is provided with a ring hole, and the ring hole and the front cover plane are formed. A cavity facing the inner cavity and an O-ring is mounted, and an O-shaped O-ring is mounted for cavity sealing.
A cycloidal hydraulic motor, comprising: a body shell having a mounting flange surface, an output shaft structure of a torque output disposed in the body shell, and a rotating stator pair fixed to the body shell by a connecting bolt, a flow distribution system and a flow passage and a rear cover for the oil to enter and exit the inner cavity of the motor; the inner bore surface of the body shell and the output shaft has a flow distribution hole, and the output shaft has a shaft diameter of the distribution groove matched with the body flow distribution hole, The front end of the output shaft is provided with a front support, the rear end of the inner hole surface of the body shell is provided with a rear support, the front support is a full complement cylindrical roller bearing, and the outer circumference of the support frame of the cylindrical roller bearing is mounted on the body On the inner bore surface of the shell, the inscribed circle of the cylindrical roller bearing is mounted on the mounting shaft seal shaft diameter of the output shaft, and the support frame abuts against the bearing installed in the stepped hole of the front cover through the plane bearing On the retaining ring, the rear support is supported on the shaft diameter of the circular surface of the distribution groove of the output shaft.
A cycloidal hydraulic motor, comprising: a body shell having a mounting flange surface, an output shaft structure of a torque output disposed in the body shell, and a rotating stator pair fixed to the body shell by a connecting bolt, a flow distribution system and a flow passage and a rear cover for the oil to enter and exit the inner cavity of the motor; the body casing and the distribution hole of the output shaft together form a shaft valve, the output shaft is provided with two front and rear bearing supports, and the front bearing support is rolled The sub-bearing, the rear bearing support is a needle bearing, and the distribution hole of the body shell and the two front and rear bearing support mounting holes are provided as one through hole.