CN216477658U

CN216477658U - Pre-tightening structure of hydraulic motor cylinder body and oil distribution disc

Info

Publication number: CN216477658U
Application number: CN202123198537.8U
Authority: CN
Inventors: 唐国伟; 姚广山
Original assignee: Sks Hydraulic Technology Co ltd
Current assignee: Sks Hydraulic Technology Co ltd
Priority date: 2021-12-20
Filing date: 2021-12-20
Publication date: 2022-05-10
Anticipated expiration: 2031-12-20

Abstract

The utility model discloses a hydraulic motor cylinder body and pretension structure of joining in marriage food tray, including rotating the cylinder body that sets up in the inner chamber of back lid and being located this cylinder body below location and installing the food tray of joining in marriage on the inner chamber bottom surface of back lid, be in one annular groove of outer peripheral face department processing near the bottom on the cylinder body, the chucking has self to have the jump ring that outwards enlarges the trend among this annular groove, in the inner chamber of back lid in with one tapered groove of cylinder body annular groove's shaping of department that corresponds, the shaping has the roof pressure inclined plane among the tapered groove, this roof pressure inclined plane pushes away the cylinder body downwards and compresses tightly the laminating mutually with the food tray through the power that restriction jump ring expansion produced. The utility model discloses compact structure, equipment convenience and processing is easy, low in production cost, can satisfy the installation demand in the narrow and small space of back lid.

Description

Pre-tightening structure of hydraulic motor cylinder body and oil distribution disc

Technical Field

The utility model relates to a hydraulic motor's manufacturing technology, especially a hydraulic motor cylinder body and join in marriage pretension structure of food tray.

Background

In the design of a hydraulic motor, the magnitude of the pretightening force between a cylinder body and an oil distribution disc is one of the key factors for the volume efficiency of the motor. The pretightening force is too big, and the cylinder body easily takes place wearing and tearing with joining in marriage the food tray, reduces life. The pretightening force is too small, the volume efficiency is lower, and the use performance is influenced. The main pretensioning structure on the market is the center plunger type, but the pretensioning structure is very difficult to assemble for a hydraulic motor with relatively small internal space.

Disclosure of Invention

The utility model aims to solve the technical problem to the current situation of above-mentioned prior art, and provide compact structure, equipment convenience, dependable performance to a hydraulic motor cylinder body that the processing degree of difficulty is low and join in marriage the pretension structure of food tray.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

the utility model provides a hydraulic motor cylinder body and pretension structure of joining in marriage food tray, including rotating the cylinder body that sets up in the inner chamber of back lid and being located this cylinder body below location installation back lid on the inner chamber bottom surface join in marriage the food tray, annular groove is processed one at the outer peripheral face department that is close to the bottom on the cylinder body, the jump ring that self has outside expansion trend is equipped with to the card among this annular groove, in the inner chamber of back lid with the shaping one toper draw-in groove of cylinder body annular groove's department of correspondence, the shaping has the roof pressure inclined plane among the toper draw-in groove, this roof pressure inclined plane pushes the cylinder body downwards and compresses tightly the laminating mutually with joining in marriage the food tray through the power that restriction jump ring expansion produced.

In order to optimize the technical scheme, the specific measures adopted further comprise:

the bottom surface of the inner cavity of the rear cover is provided with a positioning pin hole, a positioning pin used for preventing the oil distribution disc from rotating along with the cylinder body is arranged in the positioning pin hole, and a positioning hole used for positioning and penetrating the positioning pin is formed in the oil distribution disc.

The clamp spring is formed with a pressing inclined plane which is in sliding abutting fit with the abutting inclined plane of the rear cover.

The center of the bottom surface of the inner cavity of the rear cover is provided with a center pin hole, a center pin which is used for enabling the cylinder body to rotate by taking the cylinder body as a rotating axis is fixedly arranged in the center pin hole, and a rotating shaft hole which is used for being in rotating penetrating fit with the center pin is formed in the center of the cylinder body.

Compared with the prior art, the utility model discloses processing ring groove one at the outer peripheral face of cylinder body, the jump ring has been equipped with to the card in the ring groove, the jump ring has the elasticity jump ring of outside expansion trend for radial pressurized back diameter, shaping toper draw-in groove one in the inner chamber of back lid, toper draw-in groove has restricted the expansion of jump ring, toper draw-in groove's roof pressure inclined plane is under the reaction of jump ring elasticity, make the jump ring have a decurrent power to act on the cylinder body, this decurrent power can promote the cylinder body downwards and join in marriage the food tray and compress tightly mutually the laminating, thereby guarantee the pretightning force between cylinder body and food tray.

The utility model discloses compact structure, the processing degree of difficulty that has reduced motor part to can satisfy the installation demand in the narrow and small space of back lid.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a sectional view taken along line A-A of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 2 at I;

FIG. 4 is a sectional view of the rear cover of FIG. 1 in the direction of A-A;

fig. 5 is a sectional view showing the cylinder block a-a in fig. 1.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 to 5 are schematic structural views of the present invention.

Wherein the reference numerals are: the oil distribution device comprises an inner cavity K, a rear cover 1, a conical clamping groove 1a, a center pin hole 1b, a jacking inclined plane 11, a cylinder body 2, an annular clamping groove 2a, a rotating shaft hole 2b, an oil distribution disc 3, a clamp spring 4, a pressing inclined plane 41, a positioning pin 5 and a center pin 6.

As shown in fig. 1 to 5, the utility model discloses a hydraulic motor cylinder body and the pretension structure who joins in marriage the food tray, this pretension structure has the cylinder hole to be the back lid 1 of inner chamber K including the shaping, installs cylinder body 2 in the inner chamber K of back lid 1 with rotating to the bottom surface of inner chamber K is located the below location of cylinder body 2 and installs and joins in marriage food tray 3, joins in marriage food tray 3 and installs in inner chamber K with preventing rotating. In order to ensure that enough pre-tightening pressure can be kept between a cylinder body and an oil distribution disc of a traditional inclined shaft type hydraulic motor so as to form a liquid sealing structure between the oil distribution disc 3 and the bottom surface of the cylinder body 2, a design structure that a central plunger and a spring are mounted in the cylinder body is generally adopted. Therefore, the utility model discloses a neotype project organization, this structure can make the structure of motor compacter, can also reduce the processing degree of difficulty of work piece simultaneously. The utility model adopts the technical proposal that: an annular clamping groove 2a is processed on the outer peripheral surface of the cylinder body 2 close to the bottom end, a clamp spring 4 with an outward expansion trend is clamped in the annular clamping groove 2a when the clamp spring is radially pressed, a conical clamping groove 1a is formed in the inner cavity K of the rear cover 1 at the position corresponding to the annular clamping groove 2a of the cylinder body 2, the conical clamping groove 1a is provided with an annular jacking inclined surface 11 with a gradually enlarged downward opening, after the clamp spring 4 is clamped in the conical clamping groove 1a, the jacking inclined surface 11 can play a role of limiting the expansion of the clamp spring 4, as the jacking inclined surface 11 is an inclined surface, the spring force of the clamp spring 4 acts on the jacking inclined surface 11, the jacking inclined surface 11 has a reaction force on the clamp spring 4, the clamp spring 4 generates a downward force to press the lower plane of the annular clamping groove 2a, and the cylinder body 2 is pushed to be downwards to be tightly attached to the oil distribution disc 3, providing a pretension pressure to the cylinder 2.

In the embodiment, as can be seen from fig. 1, a positioning pin hole is formed on the bottom surface of the inner cavity K of the rear cover 1, and a positioning pin 5 for preventing the oil distribution pan 3 from rotating with the cylinder body 2 is installed in the positioning pin hole. The oil distribution disc 3 is provided with a positioning hole which is used for positioning, penetrating and matching with the positioning pin 5.

In order to facilitate the matching of the snap spring 4 and the pressing inclined surface 11, a pressing inclined surface 41 is formed on the outer circumferential surface of the snap spring 4, and the pressing inclined surface 41 is in sliding pressing contact with the pressing inclined surface 11 of the rear cover 1.

In the embodiment, a center pin hole 1b is formed in the center of the bottom surface of the inner cavity K of the rear cover 1, a center pin 6 is fixedly installed in the center pin hole 1b, a rotating shaft hole 2b for rotatably penetrating and matching with the center pin 6 is formed in the center of the cylinder body 2, the cylinder body 2 can rotate by taking the center pin 6 as a rotating shaft center, and the center pin 6 can ensure the rotating shaft center of the cylinder body 2 and prevent the cylinder body 2 from radially deviating.

The utility model discloses a theory of operation does:

the cylinder 2 rotates in operation about the centre pin 6. The oil distribution pan 3 is restricted from rotating with the cylinder 2 by the positioning pin 5. The clamp spring 4 is an elastic clamp spring and tends to expand outwards, the clamp spring 4 is in contact with the jacking inclined surface 11 of the rear cover 1, the rear cover 1 limits the expansion of the clamp spring 4, the clamp spring has a downward force and is pressed to the lower plane of the annular clamping groove 2a of the cylinder body 2, and the cylinder body 2 is pressed and attached to the oil distribution disc 3 downwards. The pressing force of the cylinder body 2 and the oil distribution disc 3 is the pretightening force, and the back cover 1 limits the expansion of the clamp spring 4 to generate a downward force.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. The utility model provides a hydraulic motor cylinder body and pretension structure who joins in marriage food tray, sets up cylinder body (2) in inner chamber (K) of back lid (1) and is located this cylinder body (2) below location and installs food tray (3) of joining in marriage on back lid (1) inner chamber (K) bottom surface, characterized by: the oil distribution plate is characterized in that an annular clamping groove (2a) is machined in the outer peripheral face of the cylinder body (2) close to the bottom end, a clamping spring (4) with an outward expansion trend is clamped in the annular clamping groove (2a), a conical clamping groove (1a) is formed in the inner cavity (K) of the rear cover (1) at the position corresponding to the annular clamping groove (2a) of the cylinder body (2), a jacking inclined plane (11) is formed in the conical clamping groove (1a), and the jacking inclined plane (11) pushes the cylinder body (2) to downwards press and be attached to the oil distribution plate (3) through the force generated by limiting expansion of the clamping spring (4).

2. The structure of claim 1, wherein the pre-tightening structure comprises: the bottom surface of the inner cavity (K) of the rear cover (1) is provided with a positioning pin hole, a positioning pin (5) used for preventing the oil distribution disc (3) from rotating along with the cylinder body (2) is installed in the positioning pin hole, and the oil distribution disc (3) is provided with a positioning hole used for positioning and penetrating through the positioning pin (5) to form a matched position.

3. The structure of claim 2, wherein the pre-tightening structure of the hydraulic motor cylinder and the oil distribution plate comprises: the clamp spring (4) is provided with a pressing inclined surface (41) which is in sliding and abutting fit with the abutting inclined surface (11) of the rear cover (1).

4. The pre-tightening structure of a cylinder and an oil distribution pan of a hydraulic motor according to claim 3, wherein: the rear cover is characterized in that a center pin hole (1b) is formed in the center of the bottom surface of an inner cavity (K) of the rear cover (1), a center pin (6) which is used for enabling the cylinder body (2) to rotate by taking the cylinder body as a rotating axis is fixedly installed in the center pin hole (1b), and a rotating shaft hole (2b) which is used for being in rotating penetrating fit with the center pin (6) is formed in the center of the cylinder body (2).