CN110821945B - Embedded liquid way rotary joint of cavity transmission shaft and cavity transmission shaft connecting piece - Google Patents

Abstract

The invention discloses a hollow transmission shaft embedded liquid path rotary joint and a hollow transmission shaft connecting piece. The connecting piece is formed by coaxially connecting a cylindrical sleeve at the front end and a flange part at the rear end. There is a hexagonal through hole, the shape and size of the through hole are the same as the hexagonal column part in the rotor of the liquid path rotary joint, the outer diameter of the flange part is larger than the outer diameter of the hollow transmission shaft; the cylindrical sleeve There is a circular through hole inside, the circular through hole communicates with the hexagonal through hole of the flange part, the outer diameter of the cylindrical sleeve is the same as the inner diameter of the hollow transmission shaft, and the circumference of the cylindrical sleeve is Four grooves with the same width are arranged in the direction, and the width of the grooves is the same as the diameter of the reserved holes for screws on the hollow transmission shaft. The connecting piece has the advantages of simple structure, low cost and good clamping effect, and effectively solves the technical problem of the transmission connection between the interior of the hollow transmission shaft and the rotor port of the liquid circuit rotary joint.

Description

A hollow drive shaft embedded liquid path rotary joint and a hollow drive shaft connecting piece

technical field

The invention belongs to the technical field of designing fluid mechanical transmission, in particular to a shaft coupling.

Background technique

In fluid mechanical transmission, in order to connect the driving shaft and the driven hydraulic circuit together, it is usually necessary to set a hydraulic rotary joint at the connection, and in order to connect the hydraulic rotary joint with the driving shaft, a coupling with a shaft A functional connector to achieve efficient transmission between the two. At the same time, the arrangement of the connecting piece can effectively avoid the occurrence of factors unfavorable to the transmission, such as axial offset, radial offset and angular offset during transmission.

On the other hand, for the purpose of protecting the hydraulic circuit, the drive shaft sometimes needs to be made into a hollow transmission shaft, and the hydraulic system is hidden in the drive shaft to protect it from damage from the environment and other components. In this case, there are special structural requirements for the connectors used.

The structure of the rotor port of the rotary joint of the liquid circuit is different from that of the two ends of the general transmission, and cannot be connected to the main shaft through the ordinary coupling. It is often designed with irregular shapes with hexagonal prisms combined with cylinders and interfaces. The connector must therefore match its dimensional characteristics. If the rotor port of the liquid circuit rotary joint is directly connected to the main drive shaft, the internal shape of the main drive shaft is bound to be limited, and the processing difficulty of the inner space of the main drive shaft is increased.

SUMMARY OF THE INVENTION

Aiming at the deficiencies of the prior art, the present invention provides a hollow drive shaft with a built-in liquid path rotary joint and a hollow shaft drive connector with a simple structure, low cost and good clamping effect, which effectively solves the problem of the internal and liquid paths of the hollow drive shaft. The technical problem of the transmission connection of the rotor port of the rotary joint fills the gap in the existing installation field.

The technical scheme of the present invention is as follows:

A hollow drive shaft embedded liquid path rotary joint and a hollow drive shaft connecting piece, the connecting piece is formed by coaxially connecting a cylindrical sleeve 1 at the front end and a flange portion 2 at the rear end, the cylindrical sleeve 1 The outer diameter of is smaller than the outer diameter of flange part 2;

The flange part 2 is provided with a hexagonal through hole 3, the shape and size of the through hole are the same as the hexagonal column part in the rotor of the hydraulic rotary joint, and the outer diameter of the flange part 2 is larger than that of the hollow transmission shaft. outer diameter;

The cylindrical sleeve 1 is provided with a circular through hole 4, which communicates with the hexagonal through hole 3 of the flange portion 2, and the outer diameter of the cylindrical sleeve 1 is connected to the hollow transmission. The inner diameter of the shaft is the same, and four grooves 5 with equal widths are arranged in the circumferential direction of the cylindrical sleeve 1. The width of the grooves 5 is the same as the diameter of the reserved holes for screws on the hollow transmission shaft. The axial length is slightly less than the axial length of the cylindrical sleeve 1 .

Further, the hexagonal through hole 3 and the circular through hole 4 are coaxial.

Further, the four grooves 5 with equal widths are evenly distributed on the outer peripheral surface of the cylindrical sleeve 1 .

Compared with the prior art, the present invention has the following beneficial effects:

1. The connector of the present invention can meet the requirements of the working scene of the hollow drive shaft embedded with the liquid path rotary joint and the hollow drive shaft, and has a simple shape and structure, which is conducive to rapid processing and forming;

2. The connector of the present invention can adjust the size of the flange part 2 and the cylindrical sleeve 1 according to the requirements to adapt to different working conditions;

3. During the use of the connector of the present invention, the assembly and positioning are accurate, the installation is fast and convenient, and the operability is easy;

4. The connector of the present invention can avoid adverse factors such as radial offset and angular offset caused by direct installation.

Description of drawings

FIG. 1 is a front view of the connector of the present invention.

Figures 2a, 2b are isometric views of the connector of the present invention.

Figure 3 is a bottom view of the connector of the present invention.

FIG. 4 is a top view of the connector of the present invention.

Detailed ways

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited to the content.

A hollow drive shaft embedded liquid path rotary joint and a hollow drive shaft connecting piece, the connecting piece is formed by coaxially connecting a cylindrical sleeve 1 at the front end and a flange portion 2 at the rear end, the cylindrical sleeve 1 The outer diameter of is smaller than the outer diameter of flange part 2;

The flange part 2 is provided with a hexagonal through hole 3, and the shape and size of the through hole are the same as the hexagonal column part in the rotor of the liquid circuit rotary joint. The connecting piece moves synchronously with the rotary joint of the liquid circuit; the outer diameter of the flange portion 2 is larger than the outer diameter of the hollow transmission shaft; the cylindrical sleeve 1 is provided with a circular through hole 4, and the circular through hole 4 is connected to the hollow transmission shaft. The hexagonal through hole 3 of the flange part 2 is connected, and the hexagonal through hole 3 and the circular through hole 4 are coaxial, and the outer diameter of the cylindrical sleeve 1 is the same as the inner diameter of the hollow transmission shaft, so the The circumferential direction of the cylindrical sleeve 1 is evenly provided with four grooves 5 of equal width, the width of the groove 5 is the same as the diameter of the reserved hole for the screw on the hollow drive shaft, and the axial length of the groove 5 is slightly less than The axial length of the cylindrical sleeve 1 . During the assembly process, after aligning the screw hole with any groove on the connector, the assembly screw enters the groove to synchronize the movement of the drive shaft and the connector.

The above are just some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several modifications and improvements can be made, which all belong to the protection scope of the present invention.

Claims (3)

1. The utility model provides an embedded liquid way rotary joint of cavity transmission shaft and cavity transmission shaft connecting piece which characterized in that: the connecting piece is formed by coaxially connecting a cylindrical sleeve (1) at the front end with a flange part (2) at the rear end, and the outer diameter of the cylindrical sleeve (1) is smaller than that of the flange part (2);

a hexagonal through hole (3) is formed in the flange part (2), the shape and the size of the through hole are the same as those of a hexagonal prism part in the liquid path rotary joint rotor, and the outer diameter of the flange part (2) is larger than that of the hollow transmission shaft;

be equipped with circular through-hole (4) in cylindrical sleeve (1), this circular through-hole (4) are linked together with hexagon through-hole (3) of flange portion (2), the external diameter and the cavity transmission shaft internal diameter of cylindrical sleeve (1) are the same, the circumference of cylindrical sleeve (1) is provided with slot (5) that four widths are equal, slot (5) width is the same with the epaxial screw preformed hole diameter of cavity transmission, the axial length of slot (5) slightly is less than the axial length of cylindrical sleeve (1).

2. The connection according to claim 1, the hexagonal through hole (3) and the circular through hole (4) being coaxial.

3. The connection according to claim 1, said four grooves (5) of equal width being evenly distributed on the outer peripheral surface of the cylindrical sleeve (1).

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