CN218376749U

CN218376749U - Bearing bush, hydraulic pump and vehicle

Info

Publication number: CN218376749U
Application number: CN202222750989.0U
Authority: CN
Inventors: 崔璨; 史伟东; 崔凯
Original assignee: Weichai Power Co Ltd; Linde Hydraulics China Co Ltd
Current assignee: Weichai Power Co Ltd; Linde Hydraulics China Co Ltd
Priority date: 2022-10-19
Filing date: 2022-10-19
Publication date: 2023-01-24
Anticipated expiration: 2032-10-19

Abstract

The utility model relates to the field of vehicle technology, specifically disclose a axle bush, hydraulic pump and vehicle, this axle bush includes axle bush body, first spacer and second spacer. Wherein, the axle bush body is arc. The bearing bush body has two link ends on its circumferencial direction, and the bearing bush body has first locating surface and the second locating surface of interval setting on its axis direction. The first positioning piece and the second positioning piece are respectively connected with two connecting ends of the bearing bush body, and one end of the first positioning piece, which is far away from the bearing bush body, and one end of the second positioning piece, which is far away from the bearing bush body, are both used for being abutted against the shell, so that the rotation of the bearing bush can be limited; first locating surface is used for with the sloping cam plate butt, and the second locating surface is used for with the casing butt, so can restrict axle bush axial displacement, fixes a position the axle bush in the axial of axle bush and circumferencial direction through the face contact, can guarantee that the location effect of axle bush is stable, has still reduced spare part quantity simultaneously, has simplified assembly process, can effective reduce cost.

Description

Bearing bush, hydraulic pump and vehicle

Technical Field

The utility model relates to the technical field of vehicles, especially, relate to a axle bush, hydraulic pump and vehicle.

Background

Swash plate piston pumps vary their displacement by varying the angle of inclination of the swash plate, so that the swash plate often needs to be rotated and slid on a swash plate base to vary its angle. In order to ensure smooth rotation of the swash plate, a bearing bush is generally provided to support the swash plate. The earlier stage patent with application number CN202022507482.3 discloses a supporting structure for plunger pump sloping cam plate, including sloping cam plate seat and the sloping cam plate of setting on the sloping cam plate seat, be equipped with the axle bush between sloping cam plate seat and the sloping cam plate, be equipped with the inlet port on the sloping cam plate seat, be equipped with the oil outlet with the inlet port intercommunication on the axle bush, be equipped with the locating pin or the set screw of through-hole through the centre and pass inlet port and oil outlet in proper order in order to be fixed in the sloping cam plate seat with the axle bush to locating pin or set screw and inlet port and oil outlet interference fit. However, the bearing bush is fixed only by the positioning pin or the positioning screw, so that the bearing bush has a risk of rotation, the interference assembly process is complex, the positioning pin or the positioning screw needs to be additionally arranged, the number of parts is large, and the cost is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide an: the utility model provides a axle bush, hydraulic pump and vehicle to solve the axle bush among the prior art and only fix through locating pin or set screw and have the risk of rotation, and interference fit assembly technology is complicated, and needs additionally to set up locating pin or set screw, spare part quantity is more, the higher problem of cost.

In one aspect, the utility model provides a bearing bush, this bearing bush is including being convex axle bush body, the axle bush body has two links on its circumferencial direction, the axle bush body has first locating surface and the second locating surface that the interval set up in its axial, the axle bush still includes first spacer and second spacer, first spacer with the second spacer is respectively with two the link is connected, first spacer is kept away from the one end of axle bush body and the second spacer is kept away from the one end of axle bush body all is used for with the casing butt:

the first positioning surface is used for being abutted to the swash plate, and the second positioning surface is used for being abutted to the shell.

As a preferable technical scheme of the bearing bush, the first positioning piece is tangent to the bearing bush body.

As a preferable technical scheme of the bearing bush, the second positioning piece is tangent to the bearing bush body.

As a preferable technical scheme of the bearing bush, an included angle between the first positioning piece and the second positioning piece is an acute angle.

As a preferable technical scheme of the bearing bush, an included angle between the first positioning piece and the second positioning piece is not less than 47.5 degrees and not more than 48.5 degrees.

As a preferred technical scheme of the bearing bush, a plurality of first oil grooves are formed in the outer peripheral surface of the bearing bush body, and the first oil grooves are arranged at intervals along the axis direction of the bearing bush body.

The utility model also provides a hydraulic pump, the hydraulic pump comprises two bearing bushes in any one of the above schemes, the two bearing bushes are arranged at intervals, and the axes of the bearing bush bodies of the two bearing bushes are superposed;

the hydraulic pump also comprises a shell and a swash plate, the outer peripheral surface of the bearing bush body is attached to the shell, the swash plate can be rotatably supported on the inner peripheral surface of the bearing bush body, the first positioning surface is abutted against the swash plate, and the second positioning surface is abutted against the shell; the first positioning piece is far away from one end of the bearing bush body and the second positioning piece is far away from one end of the bearing bush body, and the first positioning piece and the second positioning piece are both abutted to the shell.

As the optimal technical scheme of the hydraulic pump, a second oil groove is formed in the surface, attached to the bearing bush body, of the swash plate.

As a preferable technical solution of the hydraulic pump, one end of the first positioning piece away from the bearing shell body and one end of the second positioning piece away from the bearing shell body are both higher than the swash plate.

The utility model also provides a vehicle, hydraulic pump in the above-mentioned arbitrary scheme.

The utility model has the advantages that:

the utility model provides a bearing bush, hydraulic pump and vehicle, this bearing bush include axle bush body, first spacer and second spacer. Wherein, the axle bush body is arc. The bearing bush body has two link ends on its circumferencial direction, and the bearing bush body has first locating surface and the second locating surface of interval setting on its axis direction. The first positioning piece and the second positioning piece are respectively connected with two connecting ends of the bearing bush body, and one end of the first positioning piece, which is far away from the bearing bush body, and one end of the second positioning piece, which is far away from the bearing bush body, are both used for abutting against the shell, so that the rotation of the bearing bush can be limited; first locating surface is used for with the sloping cam plate butt, and the second locating surface is used for with the casing butt, so can restrict axle bush axial displacement, fixes a position the axle bush in the axial of axle bush and circumferencial direction through the face contact, guarantees that the location effect of axle bush is stable, compares prior art and need not to adopt locating pin or set screw, has simplified assembly process, and has reduced spare part quantity, can effective reduce cost.

Drawings

Fig. 1 is a first schematic structural diagram of a bearing bush in an embodiment of the present invention;

fig. 2 is a schematic structural diagram ii of a bearing bush in an embodiment of the present invention;

fig. 3 is a sectional view of a partial structure of a hydraulic pump according to an embodiment of the present invention;

fig. 4 isbase:Sub>A sectional view taken alongbase:Sub>A-base:Sub>A in fig. 3.

In the figure:

10. bearing bushes; 20. a swash plate; 201. a second oil groove; 30. a housing;

1. a bearing bush body; 11. a first positioning surface; 12. a second positioning surface; 13. a first oil groove; 2. a first positioning sheet; 3. a second locating plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Where the terms "first position" and "second position" are two different positions, and where a first feature is "over", "above" and "on" a second feature, it is intended that the first feature is directly over and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the hydraulic pump in the prior art, an oil inlet hole is formed in the swash plate seat, an oil outlet hole communicated with the oil inlet hole is formed in the bearing bush, a positioning pin or a positioning screw with a through hole in the middle sequentially penetrates through the oil inlet hole and the oil outlet hole to fix the bearing bush on the swash plate seat, and the positioning pin or the positioning screw is in interference fit with the oil inlet hole and the oil outlet hole. However, the bearing bush is fixed only by the positioning pin or the positioning screw, so that the risk of rotation is caused, the interference assembly process is complex, the positioning pin or the positioning screw needs to be additionally arranged, the number of parts is large, and the cost is high.

Therefore, the present embodiment provides a bearing shell to solve the above problems, the bearing shell can be abutted against the housing to limit the rotation thereof, and is abutted against the housing and the swash plate to limit the axial movement thereof, so as to ensure the complete positioning of the bearing shell, the positioning effect is stable, and no positioning pin or screw is required, thereby reducing the number of parts, simplifying the installation process, and reducing the cost.

Specifically, as shown in fig. 1 and 2, the bearing shell 10 includes a bearing shell body 1, a first positioning plate 2, and a second positioning plate 3. Wherein, the bearing bush body 1 is arc-shaped. The bearing shell body 1 has two connection ends in the circumferential direction, and the bearing shell body 1 has a first positioning surface 11 and a second positioning surface 12 which are arranged at intervals in the axial direction. The first positioning piece 2 and the second positioning piece 3 are respectively connected with two connecting ends of the bearing bush body 1, and one end of the first positioning piece 2, which is far away from the bearing bush body 1, and one end of the second positioning piece 3, which is far away from the bearing bush body 1, are both used for abutting against the shell 30, so that the rotation of the bearing bush 10 can be limited; first locating surface 11 is used for with sloping cam plate 20 butt, second locating surface 12 is used for with casing 30 butt, so can restrict axle bush 10 axial displacement, fixes a position axle bush 10 in axle bush 10's axial and circumferencial direction through the face contact, guarantees that axle bush 10's location effect is stable, compares prior art and need not to adopt locating pin or set screw, has simplified assembly process, and has reduced spare part quantity, can effectively reduce cost.

As shown in fig. 2, in the present embodiment, the first positioning piece 2 is tangent to the bearing shell body 1. The second locating plate 3 is tangent with the bearing bush body 1. Wherein, first spacer 2 and second spacer 3 are straight lamellar structure, so set up and do not influence the relative axle bush 10 of sloping cam plate 20 and rotate, simultaneously, can guarantee that axle bush 10 has great opening, the equipment sloping cam plate 20 of being convenient for. Preferably, the first positioning piece 2, the second positioning piece 3 and the bearing shell body 1 are integrally formed.

In this embodiment, an included angle between the first positioning plate 2 and the second positioning plate 3 is an acute angle, wherein an included angle between the first positioning plate 2 and the second positioning plate 3 is shown as α in fig. 2. Specifically, alpha is more than or equal to 47.5 degrees and less than or equal to 48.5 degrees. In other embodiments, the first positioning plate 2 and the second positioning plate 3 may also be configured to be arc-shaped, and the first positioning plate 2 and the second positioning plate 3 are located on the same circumference as the bearing bush body 1.

In this embodiment, the outer peripheral face of the bearing shell body 1 is provided with a plurality of first oil grooves 13, and the plurality of first oil grooves 13 are arranged at intervals along the axial direction of the bearing shell body 1. The first oil groove 13 is provided to facilitate lubrication between the bearing shell 10 and the housing 30. Preferably, the outer side surfaces of the first positioning plate 2 and the second positioning plate 3 are provided with oil grooves communicated with each first oil groove 13.

The present embodiment further provides a hydraulic pump, as shown in fig. 3 and 4, the hydraulic pump includes two bearing shells 10 described in the above embodiments, the two bearing shells 10 are spaced apart, and the axes of the bearing shell bodies 1 of the two bearing shells 10 coincide.

The hydraulic pump also comprises a shell 30 and a swash plate 20, wherein the outer peripheral surface of the bearing shell body 1 is attached to the shell 30, the swash plate 20 is rotatably supported on the inner peripheral surface of the bearing shell body 1, the first positioning surface 11 is abutted with the swash plate 20, and the second positioning surface 12 is abutted with the shell 30; the one end that axle bush body 1 was kept away from to first spacer 2 and the one end that axle bush body 1 was kept away from to second spacer 3 all with casing 30 butt. In this way, the bearing shell 10 can be stably positioned by the housing 30 and the swash plate 20, and the assembly process is simple.

Optionally, the surface of the swash plate 20, which is attached to the bearing shell body 1, is provided with a second oil groove 201. Lubricating oil is stored through the second oil groove 201 to ensure smooth rotation of the swash plate 20 relative to the bearing shell 10.

Optionally, one end of the first positioning plate 2 away from the bearing shell body 1 and one end of the second positioning plate 3 away from the bearing shell body 1 are both higher than the swash plate 20. With the arrangement, when the swash plate 20 rotates, the first positioning piece 2 and the second positioning piece 3 do not interfere with the swash plate 20, and the swash plate 20 and the bearing bush 10 can be ensured to have a larger contact area.

The embodiment also provides a vehicle comprising the hydraulic pump in the scheme.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement or improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a bearing bush, is including being convex axle bush body (1), axle bush body (1) has two links in its circumferencial direction, axle bush body (1) has first locating surface (11) and second locating surface (12) that the interval set up in its axial, its characterized in that, the bearing bush still includes first locating piece (2) and second locating piece (3), first locating piece (2) with second locating piece (3) respectively with two the link is connected, keep away from in first locating piece (2) the one end of axle bush body (1) and keep away from in second locating piece (3) the one end of axle bush body (1) all is used for with casing (30) butt:

the first positioning surface (11) is used for being abutted with the swash plate (20), and the second positioning surface (12) is used for being abutted with the shell (30).

2. Bearing shell according to claim 1, characterized in that the first locating tab (2) is tangential to the bearing shell body (1).

3. Bearing shell according to claim 2, wherein the second locating tab (3) is tangential to the bearing shell body (1).

4. Bearing shell according to claim 1, characterized in that the angle between the first locating tab (2) and the second locating tab (3) is acute.

5. Bearing shell according to claim 4, characterized in that the angle between the first and second locating tabs (2, 3) is not less than 47.5 ° and not more than 48.5 °.

6. A bearing shell according to claim 1, wherein the outer circumferential surface of the bearing shell body (1) is provided with a plurality of first oil grooves (13), and the plurality of first oil grooves (13) are arranged at intervals along the axial direction of the bearing shell body (1).

7. A hydraulic pump, characterized in that it comprises two bearing shells according to any one of claims 1 to 6, which are spaced apart and whose bearing shell bodies (1) have their axes coincident;

the hydraulic pump further comprises a shell (30) and a swash plate (20), the outer peripheral surface of the bearing shell body (1) is attached to the shell (30), the swash plate (20) is rotatably supported on the inner peripheral surface of the bearing shell body (1), the first positioning surface (11) is abutted to the swash plate (20), and the second positioning surface (12) is abutted to the shell (30); one end of the first positioning piece (2) far away from the bearing bush body (1) and one end of the second positioning piece (3) far away from the bearing bush body (1) are both abutted to the shell (30).

8. The hydraulic pump according to claim 7, characterized in that the surface of the swash plate (20) that is attached to the bearing shell body (1) is provided with a second oil groove (201).

9. The hydraulic pump according to claim 7, characterized in that the end of the first locating tab (2) remote from the bearing shell body (1) and the end of the second locating tab (3) remote from the bearing shell body (1) are both higher than the swash plate (20).

10. A vehicle comprising a hydraulic pump according to any one of claims 7 to 9.