CN113007172B - An integrated plunger motor type dual power hydraulic cylinder - Google Patents

Abstract

The invention discloses an integrated plunger motor type double-power hydraulic cylinder, which relates to the technical field of hydraulic equipment and comprises a cylinder head, wherein a supporting shaft is arranged in the cylinder head, a plunger motor is sleeved on the supporting shaft and can slide along the axial direction of the supporting shaft, the cylinder head is divided into a first oil cavity and a second oil cavity by the plunger motor, the first oil cavity and the second oil cavity are both communicated with the plunger motor, the plunger motor comprises a plunger structure and a swash plate which are oppositely arranged, and the plunger structure and the swash plate interact to generate tangential torque. The hydraulic cylinder has double power sources, the plunger motor not only serves as a power source, but also serves as a piston, hydraulic oil is introduced into the first oil cavity or the second oil cavity to enable the plunger motor to slide, meanwhile, the hydraulic oil enters the plunger motor, the internal structure of the plunger motor rotates to generate torque to enable the plunger motor to slide, and the plunger motor can provide certain torque during the pushing stroke and the return stroke of the hydraulic cylinder. The invention aims to meet the requirements of output force and use space and provides a hydraulic cylinder with small use volume and high output force.

Description

An integrated plunger motor type dual power hydraulic cylinder

technical field

The invention relates to the technical field of hydraulic equipment, in particular to an integrated plunger motor type dual power hydraulic cylinder.

Background technique

The traditional hydraulic cylinder includes a cylinder body, a piston and a piston rod. There are oil inlet and outlet ports on the cylinder body. The reciprocating motion of the piston and the piston rod is realized by the flow of oil in the closed space connected by the oil port, and the thrust and effective area of the hydraulic cylinder are realized. proportional. Under certain engineering conditions, due to the limitation of output force requirements and actual use space position, the traditional hydraulic cylinders that blindly increase the working area and meet the output force requirements no longer meet the use requirements. For example, it is common to use a multi-stage oil cylinder to increase the action area to increase the output force of the hydraulic cylinder, but the multi-stage hydraulic cylinder has not been reduced in size and does not meet the space requirements. In addition, thin-walled hydraulic cylinders with small size and ultra-high pressure are also commonly used. This kind of small high-pressure hydraulic cylinder can meet the requirements of high output force and small size, but the wall of the cylinder body is thin, which is easy to cause deformation of the cylinder body, or even rupture of the cylinder body. , causing harm.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an integrated plunger motor type dual-power hydraulic cylinder to solve the above-mentioned problems in the prior art, and provide dual power through oil pressure and plunger motor, so as to meet the output force requirements and the actual use of the space position. Require.

For achieving the above object, the present invention provides the following scheme:

The invention provides an integrated plunger motor type dual-power hydraulic cylinder, which includes a cylinder head, a support shaft is arranged in the cylinder head, a plunger motor is sleeved on the support shaft, and the plunger motor can move along all directions. The axial sliding of the support shaft, the plunger motor divides the cylinder head into a first oil cavity and a second oil cavity, and the first oil cavity and the second oil cavity are both connected to the plunger motor. In communication, the plunger motor includes a plunger structure and a swash plate oppositely arranged, and the plunger structure and the swash plate interact to generate a tangential torque.

Preferably, a ball screw is sleeved on the outer side of the support shaft, the ball screw can slide along the axial direction of the support shaft, the piston motor is sleeved on the outer side of the ball screw, and the ball screw is sleeved on the outer side of the ball screw. Balls are arranged between the plunger structure and the ball screw.

Preferably, there is a gap between the inner wall of the ball screw and the outer wall of the support shaft, and a first sealing ring and a first guide ring are provided between the inner wall of the ball screw and the outer wall of the support shaft.

Preferably, the outer side of the ball screw is sleeved with a slideway sleeve, the front end of the ball screw and the front end of the support shaft both extend into the slideway sleeve, the support shaft and the The slideway sleeve is slidably connected, the rear end of the support shaft is fixedly connected to the cylinder bottom at the rear end of the cylinder head, and the rear end of the slideway sleeve extends between the swash plate and the ball screw, A baffle plate is provided on the outer side of the slideway sleeve, the baffle plate is used to limit the position of the swash plate, and the front end of the slideway sleeve is slidably connected with the cylinder head at the front end of the cylinder head.

Preferably, the plunger structure includes an oil distribution plate, a plurality of first through holes are opened on the oil distribution plate, a cylinder body is disposed on the front side of the oil distribution plate, and the ball is located between the cylinder body and the Between the ball screws, a plurality of plungers are arranged on the cylinder body along the circumferential direction of the cylinder body, and the front ends of the plungers are embedded in the swash plate.

Preferably, a second sealing ring, a thrust bearing and a plurality of springs are arranged between the cylinder block and the swash plate, the second sealing ring is located on the inner side of a plurality of the plungers, the thrust bearing and a plurality of the The springs are all located on the outside of the plungers, and the springs are arranged along the circumference of the swash plate. One end of the spring is in contact with the swash plate, and the other end of the spring is in contact with one end of the thrust bearing. The other end of the thrust bearing is abutted against the cylinder body.

Preferably, the swash plate includes an upper flow distribution slide, a lower flow distribution slide and an outer ring of the slideway, the upper flow distribution slides are all sleeved on the outer side of the slideway sleeve, and the lower flow distribution slideway is connected to the outer ring of the slideway. The rear end of the slideway sleeve is fixedly connected, the slideway outer ring is located outside the lower flow distribution slideway, one end of the slideway outer ring is in contact with the upper flow distribution slideway outer ring, and the upper flow distribution slideway is in contact with the outer ring of the upper flow distribution slideway. One side of the lower distribution slide, one side of the lower distribution slide and one side of the outer ring of the slide are all wavy surfaces, and the wavy surface of the lower distribution slide and the wavy surface of the outer ring of the slide are the same as the upper The corrugated surfaces of the distributing slides are oppositely arranged, the upper distributing slide, the lower distributing slide and the outer ring of the slide form a slide groove, the front end of the plunger is located in the slide groove, and the upper distributing slide A plurality of second through holes are opened on the channel, and the second through holes communicate with the second oil cavity.

Preferably, the plunger includes a plunger body, and one end of the plunger body is provided with a plunger head, the plunger head includes two symmetrical cylindrical wheels, and the two wheels surround the plunger The plug head is axially rotated on a vertical installation axis, the plunger body is located in the cylinder block, and the plunger head is located in the chute groove.

Preferably, a hydraulic cylinder sleeve is provided on the outer side of the plunger structure and the swash plate, the hydraulic cylinder sleeve is fixedly connected to the swash plate through a mounting pin, and the hydraulic cylinder sleeve is connected to the cylinder head A third sealing ring and a second guide ring are arranged therebetween.

Preferably, the side wall of the cylinder head is provided with a first oil port and a second oil port, the first oil port is communicated with the first oil chamber, and the second oil port is connected with the second oil chamber Connected.

The present invention has achieved the following technical effects with respect to the prior art:

In the present invention, hydraulic oil is introduced into the first oil chamber or the second oil chamber as the first power source, and the plunger motor is used as the second power source to form dual power. The plunger motor not only acts as a power source, but also acts as a piston, The hydraulic oil is introduced into the first oil cavity or the second oil cavity to make the plunger motor slide, and the hydraulic oil enters the plunger motor at the same time, and the internal structure of the plunger motor rotates to generate torque to make the plunger motor slide. Through the ingenious design of the plunger motor , can provide a certain torque when the hydraulic cylinder pushes and returns. The present invention aims to meet certain engineering conditions, due to the requirement of output force and the limitation of use space, it is necessary to use a hydraulic cylinder with small volume and high output force.

Description of drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the present invention. In the embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

Fig. 1 is the schematic diagram of the integrated plunger motor type dual power hydraulic cylinder of the present invention;

Fig. 2 is a partial enlarged view of Fig. 1;

Fig. 3 is A-A sectional view of Fig. 1;

Fig. 4 is the exploded view of the plunger structure of the present invention;

Fig. 5 is the schematic diagram of the swash plate and the slideway sleeve of the present invention

6 is a schematic diagram of a swash plate of the present invention;

Fig. 7 is the B-B sectional view of Fig. 6;

Fig. 8 is the schematic diagram of the upper distribution slide of the present invention;

Fig. 9 is the plunger schematic diagram of the present invention;

10 is a schematic diagram of the oil distribution pan of the present invention;

Among them: 100-integrated plunger motor type dual power hydraulic cylinder, 1-cylinder block, 2-plunger, 3-oil distribution plate, 4-swash plate, 5-ball screw, 6-first oil port, 7- Second oil port, 8-first oil chamber, 9-second oil chamber, 10-spring, 11-cylinder bottom, 12-cylinder head, 13-cylinder head, 14-hydraulic cylinder sleeve, 15-third seal Ring, 16-ball, 17-slideway sleeve, 18-lower distribution slideway, 19-upper distribution slideway, 20-slideway outer ring, 21-bolt, 22-thrust bearing, 23-installation pin, 24-support Shaft, 25-Second sealing ring, 26-First sealing ring, 27-Second guide ring, 28-First guide ring, 29-Plunger motor, 30-Plunger structure, 31-Baffle plate, 32-Column Plug body, 33-plunger head, 34-wheel, 35-slide groove, 36-first through hole, 37-second through hole, 38-groove.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The purpose of the present invention is to provide an integrated plunger motor type dual-power hydraulic cylinder to solve the above-mentioned problems in the prior art, and provide dual power through oil pressure and plunger motor, so as to meet the output force requirements and the actual use of the space position. Require.

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

As shown in FIGS. 1-10 : this embodiment provides an integrated plunger motor type dual power hydraulic cylinder 100 , which includes a cylinder head 12 , a support shaft 24 is arranged in the cylinder head 12 , and a column is sleeved on the support shaft 24 The plunger motor 29, the plunger motor 29 can slide along the axial direction of the support shaft 24, the plunger motor 29 assumes the role of the piston, and the plunger motor 29 divides the cylinder head 12 into a first oil chamber 8 and a second oil chamber 9, the first oil chamber 8 and the second oil chamber 9. Both the oil chamber 8 and the second oil chamber 9 are communicated with the plunger motor 29 . The plunger motor 29 includes a plunger structure 30 and a swash plate 4 arranged oppositely. The plunger structure 30 and the swash plate 4 interact to generate tangential torque. In this embodiment, hydraulic oil is introduced into the first oil chamber 8 or the second oil chamber 9 as the first power source, and the plunger motor 29 is used as the second power source to form dual power, and the plunger motor 29 not only acts as a power source , Also as a piston, hydraulic oil is introduced into the first oil chamber 8 or the second oil chamber 9 to make the plunger motor 29 slide, while the hydraulic oil enters the plunger motor 29, and the internal structure of the plunger motor 29 rotates to generate torque to make the plunger The motor 29 slides, and through the ingenious design of the plunger motor 29, a certain torque can be provided during the push and return strokes of the hydraulic cylinder. The purpose of this embodiment is to meet certain engineering conditions. Due to the output force requirement and the limitation of the use space, it is necessary to use a hydraulic cylinder with a small volume and a high output force.

Specifically, in this embodiment, a ball screw 5 is sleeved on the outer side of the support shaft 24 , the ball screw 5 can slide along the axial direction of the support shaft 24 , the plunger motor 29 is sleeved on the outer side of the ball screw 5 , and the column Balls 16 , in particular steel balls, are disposed between the plug structure 30 and the ball screw 5 .

In this embodiment, the support shaft 24 is provided with a long key, and the long key is located in the long groove of the ball screw 5 to ensure that the ball screw 5 and the support shaft 24 do not rotate, and the inner wall of the ball screw 5 and the support shaft 24 There is a gap between the outer walls, and the ball screw 5 can slide along the axial direction of the support shaft 24. Two first sealing rings 26 and two first guide rings are arranged between the inner wall of the ball screw 5 and the outer wall of the support shaft 24 28. The two first sealing rings 26 are respectively located 10 mm away from both ends of the ball screw 5, and the first guide ring 28 is located inside the first sealing ring 26.

In this embodiment, the outer side of the ball screw 5 is sleeved with a slideway sleeve 17 , the front end of the ball screw 5 and the front end of the support shaft 24 both extend into the slideway sleeve 17 , and the front end of the support shaft 24 passes through the long key. It is slidably connected with the slideway sleeve 17 , the rear end of the support shaft 24 is fixedly connected with the cylinder bottom 11 at the back end of the cylinder head 12 by welding to prevent rotation, and the rear end of the slideway sleeve 17 extends into the swash plate 4 and the ball screw 5 In between, a baffle 31 is provided on the outer side of the slide sleeve 17. The baffle 31 is used to limit the position of the swash plate 4. The cover 13 is slidably connected, and the front end of the slideway sleeve 17 is a solid rod.

In the present embodiment, the plunger structure 30 includes an oil distribution plate 3 . The oil distribution plate 3 is provided with a plurality of first through holes 36 and a plurality of grooves 38 . The grooves 38 are arranged on the inner side of the oil distribution plate 3 , and the grooves 38 and The first through holes 36 are alternately arranged. This embodiment includes four first through holes 36 and grooves 38 . The front side of the oil distribution plate 3 is provided with a cylinder block 1 , and the grooves 38 are connected to the cylinder block 1 and the hydraulic cylinder sleeve 14 . The gap between them is the same, and a communication oil circuit is formed inside the hydraulic cylinder sleeve 14. The ball 16 is located between the cylinder block 1 and the ball screw 5, and the ball 16 forms an internal circulation in the ball screw 5 and the cylinder block 1. The cylinder body 1 can rotate freely on the ball screw 5 , and a plurality of plungers 2 are arranged on the cylinder body 1 along the circumferential direction of the cylinder body 1 . In the plunger cavity, the front end of the plunger 2 is embedded in the swash plate 4, and the first oil cavity 8, the first through hole 36, the plunger cavity, the swash plate 4 and the second oil cavity 9 are all connected.

In this embodiment, a second sealing ring 25 , a thrust bearing 22 and several springs 10 are arranged between the cylinder block 1 and the swash plate 4 . There are 9 springs 10 in this embodiment, and the second sealing ring 25 is located between the cylinder block 1 and the lower Between the distribution slides 18 and the second sealing ring 25 is located on the inner side of the plurality of plungers 2 , there is a block on the lower distribution slide 18 to support the second sealing ring 25 , the thrust bearing 22 and the springs 10 are located at the inner side of the pistons 2 . On the outside, a plurality of springs 10 are arranged along the circumferential direction of the swash plate 4 , one end of the spring 10 is abutted against the swash plate 4 , the other end of the spring 10 is abutted against one end of a thrust bearing 22 , and the other end of the thrust bearing 22 is abutted against the cylinder block 1 . The spring 10 exerts a preload force between the thrust bearing 22 and the swash plate 4 , and the cylinder block 1 and the oil distribution plate 3 are tightly fitted together under the action of the thrust bearing 22 .

In this embodiment, the swash plate 4 is designed as a slideway. The swash plate 4 includes an upper flow distribution slideway 19 , a lower flow distribution slideway 18 and a slideway outer ring 20 , and the upper flow distribution slideway 19 is sleeved on the outer side of the slideway sleeve 17 . , the lower flow distribution slideway 18 and the rear end of the slideway sleeve 17 are fixedly connected by bolts 21, the slideway outer ring 20 is located on the outside of the lower flow distribution slideway 18, and one end of the slideway outer ring 20 is in contact with the upper flow distribution slideway 19 outer ring, One side of the upper distribution chute 19, one side of the lower distribution chute 18 and one side of the outer ring 20 of the chute are all wavy surfaces, and the wavy surface of the lower distribution chute 18 and the wavy surface of the outer ring 20 of the chute are all the same as the upper distribution chute. The wavy surfaces of the slideway 19 are arranged oppositely, the upper flow distribution slideway 19, the lower flow distribution slideway 18 and the outer ring 20 of the slideway form a slideway groove 35, the front end of the plunger 2 is located in the slideway groove 35, and the upper flow distribution slideway 19 is opened There are several second through holes 37 , and this embodiment includes six second through holes 37 , and the second through holes 37 communicate with the second oil chamber 9 .

In this embodiment, the plunger 2 includes a plunger body 32, one end of the plunger body 32 is provided with a plunger head 33, and the plunger head 33 includes two symmetrical cylindrical wheels 34, the two wheels 34 surround the plunger The head 33 is rotated on the vertical axis of the installation, the plunger body 32 is located in the cylinder block 1 , and the plunger head 33 is located in the chute groove 35 .

In this embodiment, a hydraulic cylinder sleeve 14 is provided on the outside of the plunger structure 30 and the swash plate 4 , there is a gap between the hydraulic cylinder sleeve 14 and the cylinder block 1 , and the hydraulic cylinder sleeve 14 and the swash plate 4 pass through the mounting pin 23 In a fixed connection, a third sealing ring 15 and a second guide ring 27 are arranged between the hydraulic cylinder sleeve 14 and the cylinder head 12 .

In this embodiment, the side wall of the cylinder head 12 is provided with a first oil port 6 and a second oil port 7, the first oil port 6 is provided on the cylinder bottom 11, the second oil port 7 is provided on the cylinder head 13, and the first oil port 6 is provided on the cylinder bottom 11. The port 6 communicates with the first oil chamber 8 , and the second oil port 7 communicates with the second oil chamber 9 .

The working process of this embodiment is as follows: when the plunger motor 29 works as a piston, when the first oil port 6 is fed with hydraulic oil, the first oil chamber 8 is filled with high-pressure hydraulic oil, and the plunger motor 29 can move freely in the axial direction. It is pushed by the hydraulic oil pressure, and at the same time, the high-pressure hydraulic oil enters the plunger cavity of the high-pressure area of the cylinder block 1 through the first through hole 36 of the oil distribution plate 3, and exerts an axial force on the plunger 2. The wheel 34 of the plunger is connected to the plunger. The upper distribution slideway 19 is in contact with the wave surface. Since the contact surface between the wave surface and the plunger wheel 34 is always inclined, the force analysis of the wheel 34 with an inclination angle less than 90 degrees can show that the contact surface of each wheel 34 and the swash plate 4 is The direction of the generated circumferential force is consistent, so that the plunger motor 29 generates tangential torque. Ideally, the normal direction of the side circular surface of the wheel 34 is perpendicular to the tangential direction of the swash plate 4, and the low-pressure hydraulic oil of the plunger motor 29 The oil passage formed by the inner groove 38 of the oil distribution plate 3, the gap between the cylinder block 1 and the hydraulic cylinder sleeve 14 and the second through hole 37 of the swash plate 4 communicates with the second oil chamber 9. Specifically, the first oil When the cavity 8 is filled with high-pressure oil, the first through hole 36 is connected with high-pressure oil, which pushes the plunger 2 to the lowest position of the wave surface of the swash plate 4. At this time, the plunger 2 rotates to the groove 38 in the circumferential direction, and the wheel of the plunger 34 is relatively uphill on the wave surface, the plunger 2 returns, and the high pressure oil in the plunger cavity is connected to the groove 38; the low pressure oil circuit is: the passage formed by the groove 38 of the oil distribution plate 3 and the cylinder block 1, The gap formed by 1 and the hydraulic cylinder sleeve 14, the gap between the cylinder block 1 and the outer ring of the slideway 20, the circular slideway formed by the outer ring of the slideway 20 and the lower distribution slideway 18 is finally connected with the second through hole of the upper distribution slideway 19. 37 are connected, the rotation of the cylinder 1 on the ball screw 5 then pushes the swash plate 4 to move; when the second oil port 7 enters the hydraulic oil, the swash plate 4 is first pushed to make the plunger motor 29 move as a piston, and the hydraulic oil passes through the swash plate 4. The oil path of the above-mentioned low pressure hydraulic oil flows back, and the plunger motor 29 rotates in the opposite direction.

The structure of this embodiment is compact and small, and the design is ingenious. The dual power of this embodiment comes from the thrust generated by the conversion of the pure rotational motion provided by the hydraulic oil and the plunger motor 29 into the axial translation, and the dual power increases the output force, thereby Meet the requirements of the output force and the actual use of the space position. In this embodiment, the hydraulic oil in the cavity of the plunger motor 29 is distributed according to the high and low pressure oil circuits through the oil distribution plate 3, etc., so that the high pressure hydraulic oil in the hydraulic motor outputs torque when the high pressure hydraulic oil acts, and when the low pressure hydraulic oil returns to the oil, the plunger that stops the output torque is turned off. The high pressure oil in the cavity is expelled so that the wheels 34 of each plunger 2 generate the same circumferential force.

In this specification, specific examples are used to illustrate the principles and implementations of the present invention, and the descriptions of the above embodiments are only used to help understand the method and the core idea of the present invention; There will be changes in the specific implementation manner and application scope of the idea of the invention. In conclusion, the contents of this specification should not be construed as limiting the present invention.

Claims (5)

1. An integrated plunger motor type dual power hydraulic cylinder, characterized in that it comprises a cylinder head, a support shaft is provided in the cylinder head, and a plunger motor is sleeved on the support shaft, and the plunger motor can Sliding along the axial direction of the support shaft, the plunger motor divides the cylinder head into a first oil cavity and a second oil cavity, and the first oil cavity and the second oil cavity are both connected to the column. The plunger motor is communicated, and the plunger motor includes a plunger structure and a swash plate arranged oppositely, and the plunger structure and the swash plate interact to generate a tangential torque; A ball screw is sleeved on the outer side of the support shaft, and the ball screw can slide along the axial direction of the support shaft. The plunger motor is sleeved on the outer side of the ball screw. The plunger structure A ball is arranged between the ball screw and the ball screw; The outer side of the ball screw is sleeved with a slideway sleeve, the front end of the ball screw and the front end of the support shaft both extend into the slideway sleeve, the support shaft and the slideway sleeve are The rear end of the support shaft is fixedly connected to the cylinder bottom of the rear end of the cylinder head, the rear end of the slideway sleeve extends into the space between the swash plate and the ball screw, the slide A baffle plate is arranged on the outer side of the slideway sleeve, the baffle plate is used to limit the position of the swash plate, and the front end of the slideway sleeve is slidably connected with the cylinder head at the front end of the cylinder head; A hydraulic cylinder sleeve is provided on the outside of the plunger structure and the swash plate; The plunger structure includes an oil distribution plate, the oil distribution plate is provided with a plurality of first through holes and a plurality of grooves, the grooves are arranged on the inner side of the oil distribution plate, and the grooves are connected with the first through holes. A through hole is arranged alternately, a cylinder block is provided on the front side of the oil distribution plate, the groove is the same as the gap between the cylinder block and the hydraulic cylinder sleeve, and then inside the hydraulic cylinder sleeve A communicating oil path is formed, the ball is located between the cylinder block and the ball screw, the ball forms an inner circulation in the ball screw and the cylinder block, and the cylinder block is in the ball screw The lead screw can rotate freely, a plurality of plungers are arranged on the cylinder body along the circumferential direction of the cylinder body, and the front ends of the plungers are embedded in the swash plate; The swash plate includes an upper flow distribution slideway, a lower flow distribution slideway and an outer ring of the slideway, the upper flow distribution slideway is all sleeved on the outer side of the slideway sleeve, and the lower flow distribution slideway is sleeved with the slideway sleeve. The rear end of the cylinder is fixedly connected, the outer ring of the slideway is located on the outer side of the lower distribution slideway, one end of the outer ring of the slideway is in contact with the outer ring of the upper distribution slideway, one side of the upper distribution slideway, all the One side of the lower distribution slide and one side of the outer ring of the slide are both wavy surfaces, and the wavy surface of the lower distribution slide and the wavy surface of the outer ring of the slide are both the same as the waves of the upper distribution slide. The upper flow distribution slideway, the lower flow distribution slideway and the outer ring of the slideway form a slideway groove, the front end of the plunger is located in the slideway groove, and the upper flow distribution slideway is provided with a number of first two through holes, the second through holes communicate with the second oil cavity; The plunger includes a plunger body, and one end of the plunger body is provided with a plunger head, the plunger head includes two symmetrical cylindrical wheels, and the two wheels surround the axis of the plunger head Rotate to the vertical installation axis, the plunger body is located in the cylinder block, and the plunger head is located in the chute groove. 2 . The integrated piston motor type dual power hydraulic cylinder according to claim 1 , wherein there is a gap between the inner wall of the ball screw and the outer wall of the support shaft, and the inner wall of the ball screw is connected to the outer wall of the support shaft. 3 . A first sealing ring and a first guide ring are arranged between the outer walls of the support shaft. 3 . The integrated piston motor type dual power hydraulic cylinder according to claim 1 , wherein a second sealing ring, a thrust bearing and a plurality of springs are arranged between the cylinder body and the swash plate, and the first Two sealing rings are located on the inner side of the plungers, the thrust bearing and the springs are located on the outer sides of the plungers, the springs are arranged along the circumference of the swash plate, and one end of the spring In contact with the swash plate, the other end of the spring is in contact with one end of the thrust bearing, and the other end of the thrust bearing is in contact with the cylinder. 4 . The integrated piston motor type dual power hydraulic cylinder according to claim 1 , wherein the hydraulic cylinder sleeve and the swash plate are fixedly connected by mounting pins, and the hydraulic cylinder sleeve is connected to the cylinder. 5 . A third sealing ring and a second guide ring are arranged between the heads. 5 . The integrated piston motor type dual power hydraulic cylinder according to claim 1 , wherein the side wall of the cylinder head is provided with a first oil port and a second oil port, and the first oil port is connected to the The first oil cavity is communicated with, and the second oil port is communicated with the second oil cavity.

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