Closed multi-disc clutch

Abstract

The utility model discloses a closed multi-disc clutch, and aims to overcome the defect that pollutants are easy to enter the existing clutch with an open structure, so that friction failure is caused. The device comprises a spline shaft and a driving claw which are adjustably connected, a top cover and a shell are arranged outside the spline shaft and the driving claw, a closed piston cavity is formed by the top cover and the shell, a piston driven by a pressure medium is arranged in the piston cavity and moves in the axial direction of the spline shaft, and the driving claw is provided with a positioning seat defined by claw bodies. Friction plates are arranged on the positioning seat at equal intervals, friction steel sheets are arranged between the friction plates, the friction steel sheets are elastically connected, the friction steel sheets are elastically connected with the piston, and the friction steel sheets and the spline shaft can move relatively in the axial direction and rotate synchronously. And the friction plate and the friction steel sheet are arranged in the closed piston cavity, so that the probability of being polluted is reduced, and the clutch has high anti-pollution capacity.

Description

Technical Field

[0001] The utility model relates to a transmission structure, and more particularly to a closed multi-plate clutch. Background Art

[0002] The multi-plate friction clutch currently used in the industrial transmission field on the market is based on the principle that the clutch is fixedly installed on the equipment, the power input is installed on the flange, the pulley can be installed, and the power output shaft is installed in the hollow through-axle tube.

[0003] This type of clutch adopts an open structure and has certain requirements for the working environment. No pollutants such as oil, dust, and water stains can enter the gap between the clutch brake plate and the friction plate. Otherwise, the friction coefficient will be reduced during braking, or the engagement will not be complete, resulting in a decrease in the clutch transmission torque, high temperature or insufficient output torque, leading to problems such as burning plates. Summary of the Invention

[0004] The utility model overcomes the shortcomings of existing open-structure clutches that are easily infiltrated by pollutants, resulting in friction failure, and provides a closed multi-plate clutch, which reduces the probability of pollutants entering through the closed structure and improves the performance and life of the clutch in harsh environments.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A closed multi-plate clutch includes an adjustably connected spline shaft and a driving claw, a top cover and a shell are provided outside the spline shaft and the driving claw, the top cover and the shell form a closed piston chamber, a piston driven by a pressure medium is provided in the piston chamber, the piston moves along the axial direction of the spline shaft, the driving claw is provided with a positioning seat formed by a claw body, friction plates are provided on the positioning seat at equal intervals, friction steel plates are provided between the friction plates, the friction steel plates and the friction steel plates and the piston are elastically connected, the friction steel plates and the spline shaft can move relative to each other in the axial direction and rotate synchronously.

[0007] This application improves upon the existing open multi-plate clutch by placing the friction plate and friction steel plate within a closed piston chamber, thereby creating a more favorable environment and reducing the probability of contamination. Specifically, the top cover and housing form the first outer shell, while the positioning seat formed by the driving claw forms the second outer shell, thereby significantly reducing the probability of contaminants entering between the friction plate and friction steel plate.

[0008] Preferably, the piston cavity is separated by the piston to form an air intake chamber. The air intake chamber is located on the side of the piston away from the friction steel plate, and the housing is provided with an air intake hole that communicates with the air intake chamber. The piston moves only when air enters the air intake chamber, overcoming the elastic force and causing the friction plate and friction steel plate to abut against each other to transmit torque. Because the friction plate and friction steel plate are located on the side of the piston away from the air intake chamber, air entering the air intake chamber does not enter between the friction plate and friction steel plate, further reducing material exchange between the cavity containing the friction plate and friction steel plate and the outside world, thereby reducing the possibility of contamination.

[0009] Preferably, a driving flange is further included, and the driving flange is key-connected to the driving shaft.

[0010] Preferably, an axial retaining ring for positioning and a bearing for relative rotation are provided between the inner wall of the piston cavity and the spline shaft and drive shaft. The top cover and housing serve as non-rotating members, while the spline shaft and drive shaft serve as rotating members. The axial retaining ring limits axial displacement between the two, while the bearing provides circumferential rotation between the two.

[0011] Preferably, a baffle is fixedly connected to one end of the spline shaft close to the driving claw, and a friction steel plate adjacent to the baffle is elastically connected to the baffle.

[0012] Preferably, the friction steel plates are elastically connected to each other and to the piston via wave springs.

[0013] Preferably, both ends of the spline shaft are provided with splines, one end of the spline shaft being located in the piston cavity and the other end extending out of the piston cavity, and the friction steel plate and the piston being engaged with the splines in the piston cavity. This structure enables the friction steel plate and the piston to move axially relative to the spline shaft and to rotate synchronously.

[0014] Preferably, oil seals are provided at both ends of the piston cavity to improve the sealing performance of the piston cavity and prevent pollutants from entering the piston cavity and contaminating the friction steel sheet and the steel sheet.

[0015] Preferably, the piston comprises a piston body and an inner toothed disc, the inner toothed disc meshing with the spline shaft, and the piston body and the inner toothed disc are provided with bearings. The piston body and the housing are non-rotating bodies, and the inner toothed disc and the spline shaft are rotating bodies, and the two are connected by bearings.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) The friction plate and friction steel plate are placed in a closed piston cavity to reduce the probability of contamination, making the clutch highly resistant to contamination;

[0018] (2) The clutch is a normally open structure. When the pressure medium is no longer supplied or becomes unstable, the friction plate and friction steel plate are reset under the action of the elastic member, so that the power is cut off to avoid accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an axial sectional view of the utility model;

[0020] Figure 2 This is an axial side cross-sectional view of the spline shaft, driving claw, top cover and housing of the utility model;

[0021] Figure 3 It is a schematic diagram of the driving claw and friction plate of the utility model;

[0022] Figure 4 It is a schematic diagram of the spline shaft and friction steel plate of the utility model;

[0023] Figure 5 It is a schematic diagram of the piston of the utility model;

[0024] In the picture:

[0025] Spline shaft 1, inner spline 11, outer spline 12, baffle 13, drive claw 2, claw body 21, positioning seat 22, drive flange 23, top cover 3, housing 4, air intake cavity 41, air intake hole 42, friction plate 5, friction steel plate 6, wave spring 61, piston 7, piston body 71, inner gear disc 72, bearing 8, oil seal 9. DETAILED DESCRIPTION

[0026] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.

[0027] It should be noted that the following detailed descriptions are illustrative and intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present application belongs.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0029] In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "side", "bottom", etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are merely relational words determined for the convenience of describing the structural relationships of the various parts or elements of the present disclosure, and do not specifically refer to any part or element in the present disclosure, and should not be understood as limitations on the present disclosure.

[0030] In this disclosure, terms such as "fixed connection," "connected," and "connection" should be interpreted broadly to mean a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediary. Relevant researchers or technicians in this field may determine the specific meaning of these terms in this disclosure based on specific circumstances, and they should not be construed as limiting this disclosure.

[0031] Example:

[0032] A closed multi-plate clutch, Figure 1 As shown, the spline shaft 1 and driving pawl 2 are adjustably connected, with a top cover 3 and housing 4 disposed outside the spline shaft 1 and driving pawl 2. The top cover 3 and housing 4 form a closed piston 7 cavity, which houses a piston 7 driven by a pressure medium, as well as a friction plate 5 and a friction steel plate 6. The friction plate 5 is fixedly connected to the driving pawl 2, and the friction steel plate 6 is fixedly connected to the spline shaft 1. When the piston 7 pushes the friction plate 5 and friction steel plate 6 into contact, the friction force causes the spline shaft 1 and driving pawl 2 to transmit torque, achieving a clutching action.

[0033] Ginseng Figure 2 The spline shaft 1, the driving claw 2, the top cover 3 and the housing 4 are all coaxial rotating bodies. The spline shaft 1 and the driving claw 2 constitute the internal rotating body, and the top cover 3 and the housing 4 constitute the external non-rotating body.

[0034] An axial retaining ring for positioning and a bearing 8 for relative rotation are provided between the inner wall of the piston 7 cavity and the spline shaft 1 and drive shaft. The top cover 3 and housing 4 serve as non-rotating bodies, while the spline shaft 1 and drive shaft serve as rotating bodies. The axial retaining ring limits axial displacement between the two, while the bearing 8 provides circumferential rotation between the two.

[0035] Both ends of the top cover 3 and the housing 4 are open for passing the spline shaft 1 and the drive flange 23 fixedly connected to the drive claw 2. Oil seals 9 are provided at both ends to separate the rotating body and the non-rotating body, provide sealing performance, and limit the mixing of external pollutants.

[0036] The aforementioned drive flange 23 fixedly connected to the drive claw 2 is specifically fixedly connected using a key connection in some embodiments, but this is not limited to such a connection. Those skilled in the art may configure it to use a fastener connection or a threaded connection based on actual positioning requirements. The drive flange 23 is connected to a workpiece to be driven or a power source to output or input torque.

[0037] Splined shaft 1 is equipped with splines at both ends. One end of the splined shaft 1 is located in the cavity of piston 7, while the other end extends out of the cavity. The friction plate 6 and piston 7 engage with the splines in the cavity of piston 7. This structure enables the friction plate 6 and piston 7 to move axially relative to the splined shaft 1 and rotate synchronously. For ease of distinction, they are referred to as the internal spline 11 and external spline 12, respectively.

[0038] The piston 7 engages with the spline 11 in the cavity and moves along the axial direction of the spline shaft 1.

[0039] Ginseng Figure 3 The driving claw 2 includes a claw body 21, which is located at the outer edge of the driving claw 2 and extends axially at equal intervals. The claw body 21 encloses a positioning seat 22, on which friction plates 5 are provided at equal intervals along the axial direction. The friction plates 5 are fixedly connected to the claw body 21 by an interference fit, but this is not limited to this. Those skilled in the art may choose to configure other structures based on the teachings of this invention and actual usage requirements. For example, grooves may be provided on the friction plate 5 to correspond to the claw body 21 to achieve circumferential positioning.

[0040] Ginseng Figure 4 Friction steel plates 6 are disposed between the friction plates 5, and wave springs 61 are disposed between the friction steel plates 6. The friction steel plate 6 closest to the piston 7 is elastically connected to the piston 7 via the wave spring 61. The friction steel plate 6 meshes with the spline 11 within the cavity. A baffle 13 is fixedly connected to the end of the spline shaft 1 near the driving pawl 2. The friction steel plate 6 adjacent to the baffle 13 is connected to the baffle 13 via a wave spring 61. Other elastic members may also be used, and the present invention is not limited to this.

[0041] Ginseng Figure 5 The piston 7 includes a piston body 71 and an internal gear disc 72. The internal gear disc 72 engages with the spline shaft 1. The piston body 71 and the internal gear disc 72 are provided with bearings 8. The piston body 71 and the housing 4 are non-rotating bodies, while the internal gear disc 72 and the spline shaft 1 are rotating bodies. The two are connected by bearings 8. The internal gear disc 72 engages with the spline 11 in the cavity.

[0042] The piston 7 cavity is separated by the piston 7 to form an air intake chamber 41. Air intake chamber 41 is located on the side of the piston 7 away from the friction plate 6. The housing 4 is provided with an air intake hole 42 that communicates with the air intake chamber 41. Only when air enters the air intake chamber 41 does the piston 7 move, overcoming the elastic force and bringing the friction plate 5 and friction plate 6 into contact, thereby transmitting torque. Because the friction plate 5 and friction plate 6 are located on the side of the piston 7 away from the air intake chamber 41, air entering the air intake chamber 41 does not enter between the friction plate 5 and friction plate 6. This further reduces the exchange of substances between the cavity containing the friction plate 5 and friction plate 6 and the outside world, thereby reducing the possibility of contamination.

[0043] How this application works is:

[0044] When the air inlet 42 is not ventilated and the air inlet chamber 41 is at normal pressure, the friction plate 5 and the friction steel plate 6 are separated by the elastic force of the wave spring 61, and the power between the driving claw 2 and the spline shaft 1 is cut off;

[0045] When air is supplied from the air inlet 42, the pressure in the air inlet chamber 41 increases, and the pressure applied to the piston 7 is greater than the elastic force of the wave spring 61. The piston 7 moves, driving the friction plate 5 and the friction steel plate 6 to fit together, and the driving claw 2 and the spline shaft 1 transmit torque through the friction force.

[0046] This application improves upon an existing open multi-plate clutch by placing the friction plate 5 and friction steel plate 6 within a closed piston 7 cavity, thereby creating a more favorable environment and reducing the likelihood of contamination. Specifically, the top cover 3 and housing 4 form a first outer shell, while the positioning seat 22 formed by the driving claw 2 forms a second outer shell, thereby significantly reducing the likelihood of contaminants entering between the friction plate 5 and friction steel plate 6.

[0047] The above-described embodiments are only preferred solutions of the present invention and do not limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A closed multi-plate clutch comprising an adjustably connected spline shaft and a drive pawl, characterized in that: A top cover and a shell are provided outside the spline shaft and the driving claw. The top cover and the shell form a closed piston cavity. A piston driven by a pressure medium is provided in the piston cavity. The piston moves along the axial direction of the spline shaft. The driving claw is provided with a positioning seat formed by the claw body. Friction plates are provided at equal intervals on the positioning seat. Friction steel plates are provided between the friction plates. The friction steel plates and the piston are elastically connected. The friction steel plates and the spline shaft can move relative to each other in the axial direction and rotate synchronously.

2. A closed multi-plate clutch according to claim 1, characterized in that: Oil seals are provided at both ends of the piston cavity.

3. A closed multi-plate clutch according to claim 1, characterized in that: The piston cavity is divided by the piston to form an air intake cavity, the air intake cavity is arranged on a side of the piston away from the friction steel plate, and the housing is provided with an air intake hole connected to the air intake cavity.

4. A closed multi-plate clutch according to claim 3, characterized in that: The piston comprises a piston body and an inner gear disc, the inner gear disc is engaged with the spline shaft, and the piston body and the inner gear disc are provided with bearings.

5. A closed multi-plate clutch according to claim 1 or 4, characterized in that: An axial retaining ring for positioning and a bearing for achieving relative rotation are provided between the inner wall of the piston cavity and the spline shaft and the drive shaft.

6. A closed multi-plate clutch according to claim 1, characterized in that: The utility model also comprises a driving flange, which is key-connected to the driving shaft.

7. A closed multi-plate clutch according to claim 1, characterized in that: One end of the spline shaft close to the driving claw is fixedly connected with a baffle, and the friction steel sheet adjacent to the baffle is elastically connected to the baffle.

8. The closed multi-plate clutch according to claim 1, characterized in that: The friction steel plates are elastically connected to each other and to the piston via wave springs.

9. The closed multi-plate clutch according to claim 1, characterized in that: Both ends of the spline shaft are provided with splines, one end of the spline shaft is located in the piston cavity, and the other end extends out of the piston cavity, and the friction steel sheet and the piston are engaged with the splines in the piston cavity.

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