A clutch for vehicle air compressor

Abstract

The utility model discloses a vehicle air compressor clutch, comprising a clutch housing and a bearing seat, wherein a pre-tightening spring sheet is arranged between the clutch housing and the bearing seat; an inner spline friction sheet and an outer spline friction sheet arranged at intervals are arranged in the clutch housing, and a plurality of disc springs connected in series or in parallel are compressed by axial movement of the bearing seat to combine or separate the inner spline friction sheet and the outer spline friction sheet; the vehicle air compressor clutch provided by the utility model can effectively reduce the probability of fatigue failure of the spring due to high-frequency compression rebound through the structure of the arranged multi-disc disc spring, thereby reducing the failure rate of the air compressor clutch, and further improving the reliability of the air compressor clutch.

Description

Technical Field

[0001] The utility model belongs to the technical field of clutches, and in particular relates to a clutch for a vehicle air compressor. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Automotive air compressors provide compressed air for the entire vehicle as a power source for various pneumatic systems, but automotive air compressors are often directly driven by the engine through gears, and the storage of compressed air has a pressure limit. When the compressed air pressure value exceeds the limit of air storage, the compressed air will be discharged into the atmosphere through the pressure limiting valve, resulting in energy waste.

[0004] According to the demand for controlling the working state of the air compressor, the air compressor clutch has been used to a certain extent, especially the wet friction plate air compressor clutch. For example, Chinese utility model patent CN 220320140U discloses a wet clutch, including an integral spring assembly consisting of a spring seat and a plurality of springs. The control of the separation and engagement of the clutch friction plate is achieved by setting the integral spring assembly. However, this structure has the following problems: when a spring fails due to the high-frequency separation and engagement process of the clutch, the friction plate will be subjected to uneven force, resulting in uneven wear of the clutch plate, causing the friction plate to tilt, and generating jitter during clutch operation, thereby causing the air compressor clutch to fail, affecting the normal use of the vehicle-mounted air compressor or reducing the service life of the air compressor. Utility Model Content

[0005] The utility model aims to provide a vehicle air compressor clutch, which can effectively reduce the probability of fatigue failure caused by high-frequency compression and rebound of the spring, thereby reducing the failure rate of the air compressor clutch and further improving the reliability of the air compressor clutch.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] In the first aspect, an embodiment of the utility model provides a vehicle air compressor clutch, comprising a clutch housing and a bearing seat, wherein a pre-tightening spring plate is arranged between the clutch housing and the bearing seat; inner spline friction plates and outer spline friction plates are arranged at intervals in the clutch housing, and the inner spline friction plates and the outer spline friction plates are combined or separated by compressing a plurality of disc springs connected in series or in parallel through axial movement of the bearing seat.

[0008] As a further technical solution, the outer spline friction plate is connected to the clutch housing via the outer splines of the outer spline friction plate, and the inner spline friction plate is connected to the spline shaft via the inner splines of the inner spline friction plate.

[0009] As a further technical solution, the spline shaft is connected to the sleeve via a needle bearing.

[0010] As a further technical solution, the spline shaft is rigidly connected to the input gear through the threaded hole on the end face, and the engine transmits the torque to the air compressor clutch through the input gear for power input.

[0011] As a further technical solution, a plurality of disc springs and bearing seats connected in series or in parallel are mounted on a friction plate base, and the friction plate base is rigidly connected to the crankshaft of the air compressor for power output.

[0012] As a further technical solution, the friction plate base is connected to the clutch outer shell through a spline.

[0013] As a further technical solution, the number of the disc springs is set to 2-6.

[0014] As a further technical solution, the inner spline friction plate adopts a paper-based friction plate, and the outer spline friction plate includes a first outer spline friction plate, a second outer spline friction plate and a third outer spline friction plate, wherein the first outer spline friction plate adopts a non-paper-based friction plate, and the second outer spline friction plate and the third outer spline friction plate adopt a paper-based friction plate or a non-paper-based friction plate.

[0015] As a further technical solution, when a plurality of disc springs are arranged in parallel, two adjacent disc springs are arranged in parallel.

[0016] As a further technical solution, when a plurality of disc springs are arranged in series, two adjacent disc springs are arranged symmetrically on the left and right.

[0017] The beneficial effects of the above-mentioned embodiments of the utility model are as follows:

[0018] The vehicle air compressor clutch provided by the utility model can effectively reduce the probability of fatigue failure of the spring due to high-frequency compression and rebound through the structure of the multi-plate disc spring, thereby reducing the failure rate of the air compressor clutch and further improving the reliability of the air compressor clutch.

[0019] The vehicle air compressor clutch provided by the utility model compresses a plurality of disc springs connected in parallel or in series through axial movement of a bearing seat to combine or separate an inner spline friction plate and an outer spline friction plate, thereby realizing control of the on-off state of power transmission from an engine to an air compressor, which can reduce the working time of the air compressor and improve the safety and service life of the air compressor.

[0020] The vehicle air compressor clutch provided by the utility model realizes the return of the bearing seat by means of a pre-tightening spring sheet. The entire vehicle air compressor clutch has a compact structure and is easy to install. During use, jitter during clutch operation can be avoided, thereby reducing the probability of failure of the air compressor clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] Figure 1 It is a structural schematic diagram of a vehicle air compressor clutch according to Embodiment 1 of the utility model;

[0023] Figure 2 It is a schematic structural diagram of a vehicle air compressor clutch according to Embodiment 2 of the utility model.

[0024] The schematic diagram is for illustrative purposes only;

[0025] Among them, 1. clutch outer shell; 2. preload spring; 3. bearing seat; 4. thrust bearing; 5. elastic retaining ring for shaft; 6. friction plate base; 7. disc spring; 8. second external spline friction plate; 9. internal spline friction plate; 10. first external spline friction plate; 11. third external spline friction plate; 12. elastic retaining ring for hole; 13. spline shaft; 14. bearing locating sleeve; 15. needle roller bearing; 16. shaft sleeve. DETAILED DESCRIPTION

[0026] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0027] Example 1

[0028] In a typical implementation of the present invention, Figure 1 As shown, a vehicle air compressor clutch is provided, comprising a clutch housing 1 and a bearing seat 3, wherein a preload spring 2 is arranged between the clutch housing 1 and the bearing seat 3; the clutch housing is provided with an inner spline friction plate 9 and an outer spline friction plate arranged at intervals, and the inner spline friction plate 9 and the outer spline friction plate are combined or separated by compressing a plurality of parallel disc springs 7 through the axial movement of the bearing seat 3, thereby realizing the control of the on-off state of the power transmission from the engine to the air compressor. The bearing seat 3 can move in the axial direction, and when the clutch is disengaged, the bearing seat 3 moves to the left under the action of the cylinder of the air compressor, and when the clutch is re-engaged, the bearing seat 3 is reset to the right through the preload spring 2.

[0029] In this embodiment, the external spline friction plate includes a first external spline friction plate 10, a second external spline friction plate 8 and a third external spline friction plate 11, and the thickness of the three external spline friction plates is different. The first external spline friction plate 10 is connected to the clutch housing 1 through the external spline of the first external spline friction plate 10, and the third external spline friction plate 11 is limited by an elastic retaining ring for the shaft. The internal spline friction plate 9 is connected to the spline shaft 13 through the internal spline of the internal spline friction plate 9. The spline shaft 13 is coaxially connected to the shaft sleeve 16 through a needle roller bearing 15. Two needle roller bearings 15 are symmetrically arranged on the left and right, and the two needle roller bearings 15 are positioned by a bearing positioning sleeve 14.

[0030] Furthermore, the spline shaft 13 is rigidly connected to the input gear through the threaded hole on the end face, and the engine transmits the torque to the air compressor clutch through the input gear for power input.

[0031] In this embodiment, a plurality of parallel disc springs 7 and a bearing seat 3 are installed on a friction plate base 6. The bearing seat 3 is limited by an elastic retaining ring 12 through a hole. The left end face of the friction plate base 6 is butted against the right end face of the shaft sleeve 16 and are coaxially arranged to achieve axial positioning of the friction plate base 6. The friction plate base 6 is rigidly connected to the crankshaft of the air compressor for power output, and the friction plate base 6 is connected to the clutch outer shell 1 through an external spline.

[0032] In this embodiment, the inner spline friction plate 9 adopts a paper-based friction plate, which has the advantages of high friction coefficient, stable performance, heat resistance and good anti-shake performance. The first outer spline friction plate 10 adopts a non-paper-based friction plate, and the remaining outer spline friction plates can use paper-based friction plates or non-paper-based friction plates.

[0033] In this embodiment, the number of disc springs can be selectively set to 2-6 pieces according to the performance and thickness of different spring sheet materials, preferably two pieces. When multiple disc springs are arranged in parallel, two adjacent disc springs are arranged in parallel. A multi-disc disc spring structure is formed by multiple parallel disc springs. The probability of fatigue failure of the spring due to high-frequency compression and rebound can be effectively reduced, thereby reducing the failure rate of the air compressor clutch and further improving the reliability of the air compressor clutch.

[0034] When in use, the friction plate base of the vehicle air compressor clutch is rigidly connected to the crankshaft of the air compressor, and the two maintain synchronous rotation speed to achieve power output; a power input mechanism is installed in the threaded hole on the end face of the spline shaft to achieve power input; the power input mechanism can be a gear installed coaxially with the clutch, or it can be a coupling installed coaxially with the clutch, a connecting flange or other rotating parts that can transmit torque.

[0035] Example 2

[0036] In a typical implementation of the present invention, Figure 2 As shown, a vehicle air compressor clutch is provided, comprising a clutch housing 1 and a bearing seat 3, wherein a preload spring plate 2 is arranged between the clutch housing 1 and the bearing seat 3; an inner spline friction plate 9 and an outer spline friction plate 10 are arranged at intervals in the clutch housing, and a plurality of disc springs 7 connected in series are compressed by axial movement of the bearing seat 3 to combine or separate the inner spline friction plate 9 and the outer spline friction plate 10.

[0037] Furthermore, the number of the disc springs can be selectively set to 2-6 pieces according to the performance and thickness of different spring sheet materials, preferably two pieces. When multiple disc springs 7 are arranged in series, two adjacent disc springs are arranged symmetrically on the left and right. The structure of a multi-disc disc spring is formed by multiple disc springs connected in series. The probability of fatigue failure of the spring due to high-frequency compression and rebound can be effectively reduced, thereby reducing the failure rate of the air compressor clutch and further improving the reliability of the air compressor clutch.

[0038] In some other embodiments, the multi-leaf disc spring may also be composed of single-leaf disc springs connected in parallel, stacked and connected in series.

[0039] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A vehicle air compressor clutch, characterized in that: It includes a clutch housing and a bearing seat, wherein a pre-tightening spring plate is arranged between the clutch housing and the bearing seat; an inner spline friction plate and an outer spline friction plate are arranged at intervals in the clutch housing, and the inner spline friction plate and the outer spline friction plate are combined or separated by compressing a plurality of disc springs connected in series or in parallel through the axial movement of the bearing seat.

2. The vehicle air compressor clutch according to claim 1, characterized in that: The outer spline friction plate is connected to the clutch housing through the outer splines of the outer spline friction plate, and the inner spline friction plate is connected to the spline shaft through the inner splines of the inner spline friction plate.

3. The vehicle air compressor clutch according to claim 2, characterized in that: The spline shaft is connected to the shaft sleeve through a needle bearing.

4. The vehicle air compressor clutch according to claim 2, characterized in that: The spline shaft is rigidly connected to the input gear through the threaded hole on the end face, and the engine transmits the torque to the air compressor clutch through the input gear to input power.

5. The vehicle air compressor clutch according to claim 1, characterized in that: A plurality of disc springs and bearing seats connected in series or in parallel are mounted on a friction plate base, and the friction plate base is rigidly connected to a crankshaft of an air compressor for power output.

6. The vehicle air compressor clutch according to claim 5, characterized in that: The friction plate base is connected to the clutch outer shell through a spline.

7. The vehicle air compressor clutch according to claim 1, characterized in that: The number of the disc springs is set to 2-6.

8. The vehicle air compressor clutch according to claim 1, characterized in that: The inner spline friction plate adopts a paper-based friction plate, and the outer spline friction plate includes a first outer spline friction plate, a second outer spline friction plate and a third outer spline friction plate, wherein the first outer spline friction plate adopts a non-paper-based friction plate, and the second outer spline friction plate and the third outer spline friction plate adopt a paper-based friction plate or a non-paper-based friction plate.

9. The vehicle air compressor clutch according to claim 1, characterized in that: When a plurality of disc springs are arranged in parallel, two adjacent disc springs are arranged in parallel.

10. The vehicle air compressor clutch according to claim 1, characterized in that: When a plurality of disc springs are arranged in series, two adjacent disc springs are arranged symmetrically on the left and right.

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