CN216447062U

CN216447062U - Displacement fine-adjustment mechanism of hydraulic pump

Info

Publication number: CN216447062U
Application number: CN202123090116.3U
Authority: CN
Inventors: 闵思婕; 陶有树; 秦金萍
Original assignee: Anhui Boyi Fluid Power Transmission Joint Stock Co ltd
Current assignee: Anhui Boyi Fluid Power Transmission Joint Stock Co ltd
Priority date: 2021-12-09
Filing date: 2021-12-09
Publication date: 2022-05-06
Anticipated expiration: 2031-12-09

Abstract

The utility model discloses a hydraulic pump displacement fine adjustment mechanism, which relates to the technical field of hydraulic pumps and comprises a pump body, wherein a rotating shaft and a swash plate in key connection with the rotating shaft are arranged in the pump body, the swash plate is arranged on an inner cylinder body of the pump body through a swinging fulcrum, a plurality of hollow plungers are movably connected onto the swash plate, plunger non-return marbles are arranged in the plungers, and a displacement fine adjustment part is also arranged in the plungers. According to the utility model, the displacement fine-adjustment piece is arranged in the plunger, the nut can be rotated manually to drive the piston to rotate together, the size of the inner space of the micro-shell is adjusted under the threaded fit with the screw, when the inner space of the micro-shell is small, the corresponding inner space of the plunger is correspondingly increased, so that more oil can be fed, and similarly, when the inner space of the micro-shell is large, the corresponding inner space of the plunger is correspondingly reduced, so that the fine adjustment of the internal displacement of the hydraulic plunger pump is realized.

Description

Displacement fine-adjustment mechanism of hydraulic pump

Technical Field

The utility model relates to the technical field of hydraulic pumps, in particular to a fine adjustment mechanism for the discharge capacity of a hydraulic pump.

Background

The hydraulic pump is generally referred to as a plunger pump, which is an important device of a hydraulic system. The plunger reciprocates in the cylinder body to change the volume of the sealed working cavity so as to absorb and press oil. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like. However, in the prior art, the flow rate of the pump is usually changed by changing the angle of the swash plate and further changing the stroke length of the plunger in the pump cylinder, but the flow rate is not suitable for fine displacement adjustment in this way, so that the change is needed urgently.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems and provides a displacement fine adjustment mechanism of a hydraulic pump.

In order to achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a hydraulic pump discharge capacity fine-tuning, includes the pump body, be provided with the pivot in the pump body, the sloping cam plate with pivot key-type connection, the sloping cam plate passes through the swing fulcrum and sets up on the cylinder body in the pump body, swing joint has a plurality of hollow plungers on the sloping cam plate, be provided with plunger non return pellet shot from a slingshot in the plunger, still be provided with discharge capacity fine-tuning in the plunger.

Optionally, the displacement trim is composed of a micro-housing, a piston and a screw;

the micro-shell is fixedly arranged on the inner wall of the plunger, the micro-shell is of a hollow structure with one side opened, a piston is arranged in the micro-shell in a sliding mode, a nut is fixedly arranged on the piston, the nut is in threaded connection with a screw rod, and the screw rod penetrates through the piston in a gap mode and is fixedly connected with the micro-shell.

Optionally, the micro-housing is of a cylindrical structure, and the piston is a cylindrical piston.

Compared with the prior art, the utility model has the following advantages:

according to the utility model, the displacement fine-adjustment piece is arranged in the plunger, the nut can be rotated manually to drive the piston to rotate together, the size of the inner space of the micro-shell is adjusted under the threaded fit with the screw, when the inner space of the micro-shell is small, the corresponding inner space of the plunger is correspondingly increased, so that more oil can be fed, and similarly, when the inner space of the micro-shell is large, the corresponding inner space of the plunger is correspondingly reduced, so that the fine adjustment of the internal displacement of the hydraulic plunger pump is realized.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a partially enlarged view of a displacement trimmer according to the present invention.

In the figure: the pump comprises a pump body 1, a rotating shaft 2, a swash plate 3, a plunger 4, a plunger check marble 5, a displacement fine-adjustment piece 6, a micro-shell 61, a piston 62, a screw 63 and a nut 64.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-2, a fine adjustment mechanism for displacement of a hydraulic pump includes a pump body 1, a rotating shaft 2 is disposed in the pump body 1, a swash plate 3 connected to the rotating shaft 2 in a key manner, the swash plate 3 is disposed on a cylinder body in the pump body 1 through a swing fulcrum, a plurality of hollow plungers 4 are movably connected to the swash plate 3, and plunger non-return marbles 5 are disposed in the plungers 4, which is prior art and will not be described herein again.

Referring to fig. 2, a displacement fine-adjustment member 6 is arranged in the plunger 4, and the displacement fine-adjustment member 6 is composed of a micro-shell 61, a piston 62 and a screw 63, and the specific connection mode is as follows:

the micro-shell 61 is fixedly arranged on the inner wall of the plunger 4, the micro-shell 61 is of a hollow structure with one side opened, the piston 62 is arranged in the micro-shell 61 in a sliding mode, and the piston 62 can be made of rigid metal materials.

The piston 62 is fixedly provided with a nut 64, the nut 64 is in threaded connection with a screw 63, the screw 63 penetrates through the piston 62 in a clearance manner and is fixedly connected with the micro-shell 61, it is worth mentioning that a through hole is formed in the piston 62 to facilitate the penetration of the screw 63, and the through hole has another function of realizing the balance of oil pressure on two sides of the piston 62, but the through hole is as small as possible to avoid the oil in the piston 62 from being excessively pumped out.

The nut 64 can be rotated by manpower to drive the piston 62 to rotate together, and the size of the inner space of the micro-shell 61 can be adjusted by matching with the screw 63 in a threaded manner, when the inner space of the micro-shell 61 is small, the inner space of the corresponding plunger 4 is correspondingly increased, so that more oil can be fed, and similarly, when the inner space of the micro-shell 61 is large, the inner space of the corresponding plunger 4 is correspondingly reduced.

It should be noted that the micro-shell 61 should be filled with oil after adjustment, so as to prevent the inner space from being reduced by the extrusion of the oil from the outside.

In this embodiment, the micro-housing 61 is cylindrical, the piston 62 is cylindrical, and the cylindrical piston 62 ensures that the piston 62 can rotate, so that the position can be adjusted.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered as the technical solutions and the utility model concepts of the present invention in the scope of the present invention.

Claims

1. The utility model provides a hydraulic pump discharge capacity fine-tuning, includes the pump body (1), be provided with pivot (2) in the pump body (1), swash plate (3) with pivot (2) key-type connection, swash plate (3) set up on pump body (1) inner cylinder body through the swing fulcrum, swing joint has a plurality of hollow plungers (4) on swash plate (3), be provided with plunger non return pellet shot from a slingshot (5), its characterized in that in plunger (4):

and a displacement fine-adjustment piece (6) is also arranged in the plunger (4).

2. A displacement fine-adjustment mechanism of a hydraulic pump according to claim 1, characterized in that the displacement fine-adjustment member (6) is composed of a micro-housing (61), a piston (62), and a screw (63);

little casing (61) is fixed to be set up on the inner wall of plunger (4), little casing (61) adopts one side open-ended hollow structure, it is provided with piston (62) to slide in little casing (61), the fixed nut (64) that is provided with on piston (62), nut (64) threaded connection has screw rod (63), piston (62) and little casing (61) fixed connection are passed in screw rod (63) clearance.

3. A hydraulic pump displacement fine adjustment mechanism according to claim 2, characterized in that the micro housing (61) is of cylindrical construction and the piston (62) is a cylindrical piston.