Sliding disc rotating structure with rolling friction

Abstract

The utility model relates to the technical field of sliding disc type plunger pumps, in particular to a rolling friction sliding disc rotating structure which comprises a sliding disc body, a rotating mechanism is arranged on the outer wall of the sliding disc body, a swash plate is connected to the position, away from the rotating mechanism, of the outer wall of the sliding disc body, and a nut is installed in the swash plate. The rotating mechanism comprises a sliding bearing installed in the sliding disc body, a sliding disc positioning shaft is slidably connected to the interior of the sliding bearing, a set screw is installed on the outer wall of the sliding disc body and away from the sliding bearing, and a pressing disc is fixedly connected to the outer surface of the set screw and close to the sliding disc body. A rolling friction sliding disc rotating structure is designed, a rotating mechanism in the device is used for rotating, and the problems that a sliding disc structure assembly of an existing sliding disc pump cannot guarantee pretightening force perpendicular to a swash plate while reducing friction force, and structural stress is not compact are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of sliding disc type piston pumps, and specifically relates to a sliding disc rotating structure with rolling friction. Background Technique

[0002] The sliding disc pump integrates the characteristics of the existing swash plate type and swash shaft type piston pumps and avoids their respective deficiencies. However, the existing sliding disc pumps still have deficiencies, specifically: at present, the sliding disc structure assembly of the existing sliding disc pump cannot ensure the pre-tightening force perpendicular to the swash plate while reducing the friction force, and the structure is not tightly stressed.

[0003] Therefore, a sliding disc rotating structure with rolling friction is needed to solve the problems raised in the above background technique. Content of the Utility Model

[0004] The purpose of the utility model is to provide a sliding disc rotating structure with rolling friction to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A sliding disc rotating structure with rolling friction includes a sliding disc body. A rotating mechanism is arranged on the outer wall of the sliding disc body. A swash plate is connected to the outer wall of the sliding disc body at a position far from the rotating mechanism, and a nut is installed inside the swash plate;

[0007] The rotating mechanism includes a sliding bearing installed in the sliding disc body. A sliding disc positioning shaft is slidably connected inside the sliding bearing. A tightening screw is installed on the outer wall of the sliding disc body at a position far from the sliding bearing. A pressure plate is fixedly connected to the outer surface of the tightening screw near the sliding disc body. Steel balls are arranged on the outer wall of the sliding disc positioning shaft near the sliding disc body. A piston is connected to the outer wall of the sliding disc body.

[0008] As a preferred scheme of the utility model, the sliding disc body is inclined and installed on the outer wall of the swash plate, and the nut is a small hexagon extra fine pitch nut.

[0009] As a preferred scheme of the utility model, the pressure plate is made of stainless steel, and the connection mode between the sliding disc positioning shaft and the nut is a fixed connection.

[0010] As a preferred scheme of the utility model, both the sliding disc positioning shaft and the piston penetrate through the sliding disc body and extend outside the pressure plate, and the connection mode between the steel balls and the pressure plate is a rolling connection.

[0011] As a preferred scheme of the utility model, the sliding disc positioning shaft is designed with a T-shaped structure, and the piston is inclined and installed inside the sliding disc body.

[0012] As a preferred solution of the present utility model, multiple groups of the eye-catching screws, the plungers and the steel balls are provided, and the multiple groups of eye-catching screws and plungers are arranged in a circular pattern on the outer wall of the sliding disk body.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, by designing a sliding disk rotation structure with rolling friction and using the rotation mechanism in the device for rotation, on the basis of the existing structure, rotational rolling friction is increased, sliding is changed to rolling friction, so that the force on the product is more compact. At the same time, the pressing function in terms of preloading is increased, making the sliding disk structure easier to rotate and reducing friction. This solves the problem that the sliding disk structure assembly of the existing sliding disk pump cannot ensure the preloading force perpendicular to the swash plate while reducing friction, and the structure is not tightly stressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the front sectional view of the present utility model;

[0016] Figure 2 is the front view of the sliding disk positioning shaft of the present utility model;

[0017] Figure 3 is the structural schematic diagram of the sliding disk type plunger pump of the present utility model.

[0018] In the figure: 1. Sliding disk body; 2. Rotation mechanism; 3. Swash plate; 4. Nut; 201. Sliding bearing; 202. Sliding disk positioning shaft; 203. Eye-catching screw; 204. Pressure plate; 205. Steel ball; 206. Plunger. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present utility model are given. However, the present utility model can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thorough and comprehensive.

[0021] 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 can also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are only for the purpose of illustration.

[0022] Unless otherwise defined, all technical and scientific terms used in this article have the same meaning as commonly understood by those skilled in the technical field to which this utility model belongs. The terms used in the specification of this utility model in this article are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this article includes any and all combinations of one or more of the related listed items.

[0023] For the embodiments, please refer to Figures 1-3 , this utility model provides a technical solution:

[0024] A sliding disk rotating structure with rolling friction, including a sliding disk body 1, a rotating mechanism 2 is arranged on the outer wall of the sliding disk body 1, an inclined disk 3 is connected to the outer wall of the sliding disk body 1 and at a position far from the rotating mechanism 2, and a nut 4 is installed inside the inclined disk 3;

[0025] Wherein the sliding disk body 1 is inclined and installed on the outer wall of the inclined disk 3, and the nut 4 is a small hexagon special extra fine thread nut;

[0026] In this embodiment, referring to Figure 1 and Figure 2 , the rotating mechanism 2 includes a sliding bearing 201 installed in the sliding disk body 1, a sliding disk positioning shaft 202 is slidably connected inside the sliding bearing 201, a tight screw 203 is installed on the outer wall of the sliding disk body 1 and at a position far from the sliding bearing 201, a pressure plate 204 is fixedly connected to the outer surface of the tight screw 203 and at a position close to the sliding disk body 1, steel balls 205 are arranged on the outer wall of the sliding disk positioning shaft 202 and at a position close to the sliding disk body 1, and a plunger 206 is connected to the outer wall of the sliding disk body 1;

[0027] Among them, the pressure plate 204 is made of stainless steel. The connection mode between the sliding plate positioning shaft 202 and the nut 4 is a fixed connection. Both the sliding plate positioning shaft 202 and the plunger 206 penetrate through the sliding plate body 1 and extend outside the pressure plate 204. The connection mode between the steel ball 205 and the pressure plate 204 is a rolling connection. The sliding plate positioning shaft 202 is designed with a T-shaped structure. The plunger 206 is inclinedly installed in the sliding plate body 1. There are multiple groups of the eyeing screws 203, the plunger 206, and the steel ball 205. And multiple groups of the eyeing screws 203 and the plunger 206 are annularly arranged on the outer wall of the sliding plate body 1. The power source drives the spline shaft and the cylinder block to move. The cylinder block drives the sliding plate body 1 to rotate around the sliding plate positioning shaft 202 and slide on the swash plate 3 through the plunger 206. During this rotation process, mechanical energy is converted into hydraulic energy. When the plunger 206 moves on the swash plate 3, it sucks oil from the low-pressure oil side and then discharges oil to the high-pressure side. During the movement, the centrifugal force and the frictional force of the sliding plate body 1 cancel each other out, avoiding the problem that the traditional single slipper overturns relative to the surface of the swash plate 3 under the combined action of the centrifugal moment caused by the circumferential movement and the frictional moment generated by rotating with the cylinder block during high-speed movement. At the same time, the wear of the structure of the sliding plate body 1 is uniform, eliminating or reducing the phenomenon of uneven wear of the slipper pair. Secondly, in the hydrostatic support sliding plate pair structure, the wear between the sliding plate body 1 and the swash plate 3 can be overall compensated. There is a large contact area between the two. Therefore, the wear between the friction pair of the sliding plate body 1 and the swash plate 3 is small and more uniform, avoiding the premature occurrence of the "burning plate" phenomenon, which is beneficial to improving the working pressure and working speed of the pump. Thirdly, multiple groups of steel balls 205 are equivalent to a thrust bearing. It is necessary to apply a force of at least 1% of the axial rated static load as a preload. Therefore, this structure ensures the force in both the axial and radial directions. At the same time, rolling friction is formed axially, which well ensures the stable operation of the sliding plate body 1.

[0028] The working process of the present utility model: When the rolling friction sliding disk rotating structure designed by this solution operates, the power source drives the spline shaft and the cylinder block to move. The cylinder block drives the sliding disk body 1 to rotate around the sliding disk positioning shaft 202 and slide on the swash plate 3 through the plunger 206. During this rotation process, mechanical energy is converted into hydraulic energy. During the movement of the plunger 206 on the swash plate 3, oil is sucked from the low-pressure oil side and then discharged to the high-pressure side. During the movement, the centrifugal force and frictional force of the sliding disk body 1 cancel each other out, avoiding the problem that the sliding shoe is overturned relative to the surface of the swash plate 3 under the combined action of the centrifugal moment caused by the circumferential movement and the frictional moment generated by rotating with the cylinder block during the high-speed movement of the traditional single sliding shoe. At the same time, the wear of the sliding disk body 1 structure is uniform, eliminating or reducing the uneven wear of the sliding shoe pair. The wear between the sliding disk body 1 and the swash plate 3 in the hydrostatic bearing sliding disk pair structure can be overall compensated. There is a large contact area between the two, further reducing the wear between the friction pair of the sliding disk body 1 and the swash plate 3. Again, multiple groups of steel balls 205 are equivalent to a thrust bearing, and a force of at least 1% of the axial rated static load must be applied as a preload. Therefore, this structure ensures the force in both the axial and radial directions, and at the same time, rolling friction is formed axially, well ensuring the stable operation of the sliding disk body 1.

[0029] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A sliding disk rotating structure with rolling friction, comprising a sliding disk body (1), characterized in that: The outer wall of the sliding plate body (1) is provided with a rotating mechanism (2), the outer wall of the sliding plate body (1) is connected to a swash plate (3) at a position away from the rotating mechanism (2), and a nut (4) is installed inside the swash plate (3); The rotating mechanism (2) comprises a sliding bearing (201) installed in an inner sliding disk body (1); the sliding bearing (201) is slidably connected to a sliding disk positioning shaft (202) inside; a locking screw (203) is installed on the outer wall of the sliding disk body (1) at a position away from the sliding bearing (201); a pressure plate (204) is fixedly connected to the outer surface of the locking screw (203) at a position close to the sliding disk body (1); a steel ball (205) is arranged on the outer wall of the sliding disk positioning shaft (202) at a position close to the sliding disk body (1); and a plunger (206) is connected to the outer wall of the sliding disk body (1).

2. The sliding disk rotating structure of rolling friction according to claim 1, characterized in that: The sliding plate body (1) is obliquely mounted on the outer wall of the inclined plate (3), and the nut (4) is a small hexagonal nut with a special fine pitch.

3. The sliding disk rotating structure of rolling friction according to claim 1, characterized in that: The pressure plate (204) is made of stainless steel, and the sliding plate positioning shaft (202) and the nut (4) are connected in a fixed manner.

4. The sliding disk rotating structure of rolling friction according to claim 1, characterized in that: The sliding plate positioning shaft (202) and the plunger (206) both penetrate the sliding plate body (1) and extend outside the pressure plate (204), and the steel ball (205) and the pressure plate (204) are connected in a rolling manner.

5. The sliding disk rotating structure of rolling friction according to claim 1, characterized in that: The sliding disc positioning shaft (202) is designed as a T-shaped structure, and the plunger (206) is installed obliquely in the sliding disc body (1).

6. The sliding disk rotating structure of rolling friction according to claim 1, characterized in that: The locking screws (203), plungers (206) and steel balls (205) are provided in multiple groups, and the multiple groups of locking screws (203) and plungers (206) are arranged in a ring on the outer wall of the sliding disc body (1).

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