Bearing and hydraulic pump seat assembly

Abstract

The utility model relates to the technical field of bearings, in particular to a bearing and a hydraulic pump seat assembly. The bearing comprises an inner ring, an outer ring, cylindrical roller assemblies and rolling ball assemblies, the cylindrical roller assemblies and the rolling ball assemblies are arranged between the inner ring and the outer ring, and the cylindrical roller assemblies and the rolling ball assemblies are arranged in a spaced mode in the axis direction of the inner ring and the axis direction of the outer ring. The bearing comprises the cylindrical roller assembly and the rolling ball assembly, the cylindrical roller bearing and the rolling ball assembly are integrated, the bearing load can be increased, the press fitting time is shortened, the service life is prolonged, and the labor cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of bearings, in particular to a bearing and a hydraulic pump seat assembly. Background Art

[0002] As a transmission mechanism between an engine and a gear pump, the power of the engine is output to the gear pump through the hydraulic pump seat. In the prior art, a deep groove ball bearing and a cylindrical roller bearing are provided in the hydraulic pump seat. The deep groove ball bearing and the cylindrical roller bearing are used to drive the hydraulic pump gear shaft. Among them, the deep groove ball bearing and the cylindrical roller bearing are respectively and independently matched with the hydraulic pump gear shaft. This results in the deep groove ball bearing and the cylindrical roller bearing having a relatively small load-bearing capacity. As the working cycle becomes longer, the wear of the deep groove ball bearing and the cylindrical roller bearing will reduce the service life of the hydraulic pump seat. At the same time, the separate installation process of the bearings is complex, the pressing time is long, and the labor cost increases. Summary of the Utility Model

[0003] In view of this, the embodiments of the present utility model provide a bearing and a hydraulic pump seat assembly. The bearing includes a cylindrical roller assembly and a rolling ball assembly. By integrating the cylindrical roller bearing and the rolling ball bearing, the bearing load can be increased, the pressing time can be reduced, the service life can be extended, and the labor cost can be reduced.

[0004] In a first aspect, the bearing provided by the embodiments of the present utility model includes an inner ring, an outer ring, a cylindrical roller assembly, and a rolling ball assembly. The cylindrical roller assembly and the rolling ball assembly are both disposed between the inner ring and the outer ring. Along the axial direction of the inner ring and the outer ring, the cylindrical roller assembly and the rolling ball assembly are arranged at intervals.

[0005] The bearing in this application includes a cylindrical roller assembly and a rolling ball assembly, and both the cylindrical roller assembly and the rolling ball assembly are disposed between the inner ring and the outer ring. It can be understood that the bearing in this application integrates the cylindrical roller bearing and the rolling ball bearing, thereby improving the load of the bearing in this application, and also ensuring the concentricity of the cylindrical roller bearing and the rolling ball bearing, balancing the problem that the cylindrical roller bearing cannot bear axial loads, extending the service life of the hydraulic pump seat assembly with the bearing in this application, and reducing the failure rate.

[0006] In one embodiment, the cylindrical roller assembly includes a first retainer and a plurality of cylindrical rollers. The plurality of cylindrical rollers are disposed on the first retainer, and the plurality of cylindrical rollers are distributed along the circumferential direction of the inner ring and the outer ring.

[0007] In one embodiment, the rolling ball assembly includes a second retainer and a plurality of rolling balls. The plurality of rolling balls are disposed on the second retainer, and the plurality of rolling balls are distributed along the circumferential direction of the inner ring and the outer ring.

[0008] In one embodiment, a plurality of first rolling ball grooves are provided on the outer surface of the inner ring, and the plurality of first rolling ball grooves are distributed along the circumferential direction of the inner ring.

[0009] In one embodiment, a plurality of second rolling ball grooves are provided on the inner surface of the outer ring, and the plurality of second rolling ball grooves are distributed along the circumferential direction of the outer ring.

[0010] In a second aspect, the present application provides a hydraulic pump seat assembly, including the bearing in any technical solution of the first aspect. The hydraulic pump seat has a receiving cavity, and the bearing is disposed in the receiving cavity. Among them, since the hydraulic pump seat assembly has the bearing in the first aspect, the service life of the hydraulic pump seat assembly can be improved, and the installation of the hydraulic pump seat assembly can also be simplified.

[0011] In one embodiment, the hydraulic pump seat assembly further includes at least one retaining ring. One end of the retaining ring is embedded in the hydraulic pump seat, and the other end of the retaining ring is used to abut against the outer ring of the bearing.

[0012] In one embodiment, the hydraulic pump seat includes at least one mating hole, the mating hole communicates with the receiving cavity, and one end of the retaining ring is embedded in the mating hole.

[0013] In one embodiment, the hydraulic pump seat assembly further includes a hydraulic pump gear shaft, and one end of the hydraulic pump gear shaft is fitted with the inner ring of the bearing.

[0014] In one embodiment, the hydraulic pump seat further includes a sealing groove for installing a sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of a hydraulic pump seat assembly provided by an embodiment of the present invention;

[0016] Figure 2 is a schematic structural diagram of a bearing provided by an embodiment of the present invention.

[0017] Reference numerals: 10 - hydraulic pump seat; 20 - bearing; 21 - inner ring; 22 - outer ring; 23 - cylindrical roller assembly; 230 - cylindrical roller; 231 - first retainer; 24 - rolling ball assembly; 240 - rolling ball; 241 - second retainer; 30 - retaining ring; 40 - hydraulic pump gear shaft; 50 - sealing groove; 60 - sealing ring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in 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 making creative efforts shall fall within the protection scope of the present utility model.

[0019] Next, a hydraulic pump seat assembly and a bearing provided in the embodiments of the present utility model will be specifically described in conjunction with the accompanying drawings.

[0020] Figure 1 It is a schematic structural diagram of a hydraulic pump seat assembly provided in an embodiment of the present utility model. Refer to Figure 1 , in the hydraulic pump seat assembly provided in the embodiment of the present utility model, it includes a hydraulic pump seat 10, a hydraulic pump gear shaft 40 and a bearing 20. The hydraulic pump seat 10 has a receiving cavity, the axis of the receiving cavity is parallel to the axis of the bearing 20, the bearing 20 is arranged in the receiving cavity, one end of the hydraulic pump gear shaft 40 is arranged in the receiving cavity, and one end of the hydraulic pump gear shaft 40 is engaged with the inner ring 21 of the bearing 20. During the rotation of the hydraulic pump gear shaft 40, it will drive the bearing 20 to move. Since the bearing 20 in this application integrates a cylindrical roller 230 bearing and a deep groove ball bearing, it can increase the load of the bearing 20 and ensure the concentricity of the bearing 20, so as to reduce the failure rate of the hydraulic pump seat 10 assembly and extend the service life of the hydraulic pump seat 10 assembly.

[0021] In order to ensure the stability of the bearing 20 installed in the space of the receiving cavity, the hydraulic pump seat 10 assembly further includes at least one mating hole, at least one mating hole communicates with the receiving cavity, and a retaining ring 30 is installed in each mating hole. One end of the retaining ring 30 is embedded in the hydraulic pump seat 10 through the mating hole, and the other end of the retaining ring 30 extends into the receiving cavity and abuts against the outer ring 22 of the bearing 20 located in the receiving cavity to lock and fix the bearing 20.

[0022] It is worth mentioning that the extending directions of the respective mating holes can be the same, and the respective mating holes can be distributed in the circumferential direction of the bearing 20 on the inner wall of the receiving cavity.

[0023] Among them, the hydraulic pump gear shaft 40 has an internal spline, and the internal spline is used to cooperate with the external spline of the gear pump to drive the rotation of the hydraulic pump gear shaft 40. Among them, one end of the internal spline of the hydraulic pump gear shaft 40 is located in the receiving cavity, and one end of the internal spline of the hydraulic pump gear shaft 40 is sleeved on the inner ring 21 of the bearing 20. In order to improve the stability of the movement of the hydraulic pump gear shaft 40, the hydraulic pump seat 10 assembly further includes a hexagon nut, and the hexagon nut is used to cooperate with one side of the internal spline of the hydraulic pump gear shaft 40 to further lock and fix the hydraulic pump gear shaft 40.

[0024] The hydraulic pump seat 10 further includes a sealing groove 50 which is arranged on the outer surface of the hydraulic pump seat 10. A sealing ring 60 is installed in the sealing groove 50 to improve the stability when the hydraulic pump seat 10 is installed.

[0025] The above-mentioned bearing 20 will be introduced in detail below.

[0026] Figure 2 FIG. is a schematic structural diagram of the bearing 20 provided by an embodiment of the present invention. Referring to Figure 2 , Figure 2 , the solid line with an arrow in it is the axial direction of the inner ring 21 and the outer ring 22. The bearing 20 provided by the embodiment of the present application includes an inner ring 21, an outer ring 22, a cylindrical roller assembly 23 and a rolling ball assembly 24. The cylindrical roller assembly 23 and the rolling ball assembly 24 are both arranged between the inner ring 21 and the outer ring 22. Along the axial direction of the inner ring 21 and the outer ring 22, the cylindrical roller assembly 23 and the rolling ball assembly 24 are arranged at intervals. In the bearing 20 of the present application, the cylindrical roller assembly 23 and the rolling ball assembly 24 are arranged between the inner ring 21 and the outer ring 22, that is, the bearing 20 integrates the cylindrical roller 230 bearing and the rolling ball 240 bearing. In this way, the load of the bearing 20 in the present application can be increased, and the concentricity of the cylindrical roller 230 bearing and the rolling ball 240 bearing can be ensured, balancing the problem that the cylindrical roller 230 bearing 20 cannot bear axial load, extending the service life of the hydraulic pump seat 10 assembly with the bearing 20 in the present application, and reducing the failure rate.

[0027] In one embodiment, the cylindrical roller assembly 23 includes a first retainer 231 and a plurality of cylindrical rollers 230. The plurality of cylindrical rollers 230 are arranged on the first retainer 231 and are distributed along the circumferential direction of the inner ring 21 and the outer ring 22. Among them, the first retainer 231 is used to relatively fix the positions of the respective cylindrical rollers 230.

[0028] The rolling ball assembly 24 includes a second retainer 241 and a plurality of rolling balls 240. The plurality of rolling balls 240 are arranged on the second retainer 241 and are distributed along the circumferential direction of the inner ring 21 and the outer ring 22. The second retainer 241 is used to relatively fix the positions of the respective rolling balls 240. Among them, the first retainer 231 and the second retainer 241 can be cages.

[0029] In one embodiment, a plurality of first rolling ball 240 grooves are arranged on the outer surface of the inner ring 21 and are distributed along the circumferential direction of the inner ring 21. Among them, the outer surfaces of the plurality of first rolling ball 240 grooves are smooth arcs, and the first rolling ball 240 grooves can have better rolling contact with the cylindrical rollers 230.

[0030] In one embodiment, a plurality of second rolling ball 240 grooves are provided on the inner surface of the outer ring 22, and the plurality of second rolling ball 240 grooves are distributed along the circumferential direction of the outer ring 22. Among them, the number of the second rolling ball 240 grooves may be the same as the number of the first rolling ball 240 grooves, and the plurality of second rolling ball 240 grooves and the plurality of first rolling ball 240 grooves are arranged in one-to-one correspondence. The outer surfaces of the plurality of second rolling ball 240 grooves are smooth arcs, and the second rolling ball 240 grooves can have better rolling contact with the cylindrical rollers 230.

[0031] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A bearing, characterized in that: include: An inner ring, an outer ring, a cylindrical roller assembly and a rolling ball assembly, wherein the cylindrical roller assembly and the rolling ball assembly are both arranged between the inner ring and the outer ring, and along the axis direction of the inner ring and the outer ring, the cylindrical roller assembly and the rolling ball assembly are arranged at intervals; The outer surface of the inner ring is provided with a plurality of first rolling ball grooves, and the plurality of first rolling ball grooves are distributed along the circumferential direction of the inner ring. The inner surface of the outer ring is provided with a plurality of second rolling ball grooves, and the plurality of second rolling ball grooves are distributed along the circumferential direction of the outer ring. The plurality of second rolling ball grooves are arranged one-to-one correspondingly to the plurality of first rolling ball grooves.

2. The bearing according to claim 1, characterized in that The cylindrical roller assembly includes a first retainer and a plurality of cylindrical rollers. The plurality of cylindrical rollers are disposed in the first retainer and are distributed along the circumferential direction of the inner ring and the outer ring.

3. The bearing according to claim 1, characterized in that: The rolling ball assembly includes a second retainer and a plurality of rolling balls. The plurality of rolling balls are disposed in the second retainer and are distributed along the circumferential direction of the inner ring and the outer ring.

4. A hydraulic pump seat assembly, characterized in that: The invention comprises a hydraulic pump seat and a bearing as claimed in any one of claims 1 to 3, wherein the hydraulic pump seat has a receiving cavity, and the bearing is arranged in the receiving cavity.

5. The hydraulic pump seat assembly according to claim 4, characterized in that: The hydraulic pump seat assembly further comprises at least one retaining ring, one end of which is embedded in the hydraulic pump seat, and the other end of which is used to abut against the outer ring of the bearing.

6. The hydraulic pump seat assembly according to claim 5, characterized in that: The hydraulic pump seat comprises at least one matching hole, the matching hole is communicated with the accommodating cavity, and one end of the retaining ring is embedded in the matching hole.

7. The hydraulic pump seat assembly according to claim 4, characterized in that: The hydraulic pump seat assembly also includes a hydraulic pump gear shaft, one end of which is matched with the inner ring of the bearing.

8. The hydraulic pump seat assembly according to claim 4, characterized in that: The hydraulic pump seat also includes a sealing groove, and the sealing groove is used for installing a sealing ring.

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