Spherical hinge mechanism of axial plunger pump

Abstract

The axial plunger pump spherical hinge mechanism comprises a spherical hinge connected to a main shaft in a sleeving mode, the end face of the spherical hinge is attached to the step face of the main shaft, and the arc working face of the spherical hinge is attached to the inclined face of a gear disc; a wear-resistant sheet made of bearing steel is adhered to the joint of the end surface of the spherical hinge and the step surface; a spiral oil groove is machined in the arc working face of the spherical hinge, the spiral oil groove is a continuous or multi-section spiral groove, and the extending direction of the spiral oil groove is matched with the movement trend of the spherical hinge relative to the gear disc. Under the conditions that the aviation axial variable plunger pump is high in rotating speed and rapid in variable response, abnormal abrasion of the spherical hinge is avoided, the reliability of the aviation hydraulic pump is improved, and the service life of the aviation hydraulic pump is prolonged.

Description

TECHNICAL FIELD

[0001] The application relates to a structure for improving the wear resistance of a ball joint of an axial plunger pump. BACKGROUND

[0002] The axial plunger pump is one of core components of a hydraulic system, and is widely applied to fields such as agricultural machinery, engineering machinery and aerospace because of high working pressure, high power density, low noise, high volumetric efficiency and convenient variable.

[0003] Therefore, it is of great significance to design a structure for improving the wear resistance of a ball joint of an axial plunger pump, so as to improve the reliability and service life of an aviation hydraulic pump on the basis of ensuring control characteristics. SUMMARY

[0004] To solve the above technical problems, the application provides an axial plunger pump ball joint mechanism, which comprises a ball joint sleeved on a main shaft, the end face of the ball joint is attached to the stepped face of the main shaft, and the circular arc working face of the ball joint is attached to the inclined face of a gear plate.

[0005] The wear-resistant sheet made of bearing steel is attached to the attachment of the end face of the ball joint and the stepped face.

[0006] The ball joint and the main shaft are fixed through interference fit, key connection or threaded connection.

[0007] The end of the gear plate is connected to a swash plate.

[0008] Compared with the prior art, the aviation axial variable plunger pump can avoid abnormal wear of the ball joint under the conditions of high speed and rapid variable response, and the reliability and service life of the aviation hydraulic pump are improved.

[0009] The above description is only a summary of the technical scheme of the application, in order to more clearly understand the technical means of the application, the application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0010] One or more embodiments are illustrated by way of example in the drawings hereof, which are not intended to limit the embodiments to the common features illustrated and described. Wherever possible, common reference numbers will be used throughout the drawings / Employment(s) and this written description to refer to same or like parts. In addition, it should be understood that the drawings are not necessarily drawn to scale.

[0011] Figure 1 is the schematic diagram of the assembly structure of the present application; Figure 2 is the enlarged view of the assembly of the ball joint and the stepped surface of the present application; Figure 3 is the top view of the spiral oil groove of the present application; Figure 4 is the front view of the spiral oil groove of the present application; In the figure: 1 - stepped surface, 2 - swash plate, 3 - wear-resistant sheet, 4 - gear plate, 5 - ball joint, 6 - main shaft. DETAILED DESCRIPTION

[0012] In order to make the purpose, technical solutions and advantages of the present application more clear, the embodiments of the present application will be described in detail below with reference to the drawings. However, those skilled in the art can understand that in the embodiments of the present application, many technical details are proposed in order to make the readers better understand the present application. However, the technical solutions claimed by the present application can be realized even without these technical details and various changes and modifications based on the following embodiments. The division of the following embodiments is for the convenience of description and should not constitute any limitation on the specific implementation of the present application. The embodiments can be combined and referenced with each other without contradiction.

[0013] As Figures 1-4 shown in the figure is a ball joint mechanism of an axial plunger pump, comprising a ball joint 5, the ball joint 5 is installed on a main shaft 6, the end surface of the ball joint 5 is attached to the stepped surface 1 of the main shaft 6, and the arc surface of the ball joint 5 is attached to the inclined surface of the gear plate 4; a wear-resistant sheet 3 made of bearing steel sheet is adhered to the cooperation part of the ball joint 5 and the stepped surface 1 of the main shaft 6, thereby increasing the load resistance and wear resistance; a spiral oil groove is provided on the arc surface of the ball joint 5, which is used to increase the heat dissipation and lubrication capacity between the friction surfaces.

[0014] Those skilled in the art can understand that the above-mentioned embodiments can be changed in form and details in actual application without departing from the spirit and scope of the present application.

Claims

1. A ball and socket mechanism for an axial piston pump characterized by: The application relates to a ball joint (5) sleeved on a main shaft (6), the end surface of the ball joint (5) is attached to the stepped surface (1) of the main shaft (6), the circular arc working surface of the ball joint (5) is attached to the inclined surface of a gear disc (4); a wear-resistant piece (3) made of bearing steel is attached to the attachment position of the end surface of the ball joint (5) and the stepped surface (1); a spiral oil groove is formed on the circular arc working surface of the ball joint (5), and the spiral oil groove is a continuous or multi-section spiral groove, the extending direction of the spiral oil groove is adapted to the movement trend of the ball joint (5) relative to the gear disc (4).

2. A ball joint mechanism for an axial piston pump according to claim 1, characterized in that: The wear-resistant piece (3) is attached to the end surface of the ball joint (5) through high-strength adhesive.

3. The axial piston pump ball and socket mechanism of claim 1, wherein: The ball joint (5) and the main shaft (6) are fixed through interference fit, key connection or screw connection.

4. The axial piston pump ball and socket mechanism of claim 1 wherein: The end of the gear disc (4) is connected with the swash plate (2).

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