CN220910282U

CN220910282U - Wet clutch

Info

Publication number: CN220910282U
Application number: CN202320839070.0U
Authority: CN
Inventors: 王磊; 郭华; 程少奇; 贺洋洋
Original assignee: Changzhou Changfa Agriculture Equipment Engineering Technology Research Co ltd; Jiangsu Changfa Agricultural Equipment Co Ltd
Current assignee: Changzhou Changfa Agriculture Equipment Engineering Technology Research Co ltd; Jiangsu Changfa Agricultural Equipment Co Ltd
Priority date: 2023-04-15
Filing date: 2023-04-15
Publication date: 2024-05-07
Anticipated expiration: 2033-04-15

Abstract

The present utility model provides a wet clutch, comprising: the piston is sleeved on the output shaft and can move along the axial direction of the output shaft, and a first cavity is arranged between the piston and the driven hub; the pressure plate is sleeved on the output shaft, is arranged between the piston and the power output box body, and is provided with a second cavity; the connecting pin is arranged between the piston and the pressure plate, and the piston and the pressure plate synchronously rotate; the output shaft comprises a first oil duct connected with the first cavity and a second oil duct connected with the second cavity. According to the utility model, by arranging the connecting pin, the piston and the pressure plate are kept relatively static, and serious abrasion caused by overlarge speed difference is avoided, so that oil leakage is caused.

Description

Wet clutch

Technical Field

The utility model relates to the technical field of transmission, in particular to a wet clutch.

Background

In the prior art, there is a rotational speed difference between the piston and the output shaft of the wet clutch, resulting in a long time in a high rotational speed operating state of the seal for the piston seal, accelerating wear and aging of the seal. The sealing performance of the piston is deteriorated, the pressure of the lubricating oil is unstable, the response speed of the wet clutch is lowered, and accidents are easily caused. Accordingly, it is desirable to provide a wet clutch that overcomes the above-described drawbacks.

Disclosure of utility model

The utility model aims to provide a wear-resistant wet clutch.

According to one aspect of the present utility model, there is provided a wet clutch comprising: a power output box; an input shaft and a drive hub that rotate synchronously; an output shaft and a driven hub which rotate synchronously; establish the friction disc subassembly between initiative hub and driven hub, initiative hub power passes through the friction disc subassembly and transmits to driven hub when the friction disc subassembly combines, and transmission between initiative hub and the driven hub is disconnected when the friction disc subassembly separates, still includes:

The piston is sleeved on the output shaft and can move along the axial direction of the output shaft, and a first cavity is arranged between the piston and the driven hub;

the pressure plate is sleeved on the output shaft, is arranged between the piston and the power output box body, and is provided with a second cavity;

The connecting pin is arranged between the piston and the pressure plate, and the piston and the pressure plate synchronously rotate;

The output shaft comprises a first oil duct connected with the first cavity and a second oil duct connected with the second cavity.

Preferably, a brake pad is arranged on the end face of the power output box body, which is close to one side of the piston, the piston comprises a main body part extending along the radial direction of the output shaft and an extension part extending from the main body part towards one side of the pressure plate along the axial direction of the output shaft, and the extension part comprises a brake surface which is parallel to the brake pad.

Preferably, the extension further comprises a sealing surface adjacent the braking surface, the radially outer end of the pressure plate being provided with a seal, the seal being provided between the pressure plate and the sealing surface.

Preferably, a baffle is arranged at one end of the driven hub, which is close to the input shaft, the friction plate assembly is arranged between the baffle and the piston, an elastic element is arranged in the first cavity, one end of the elastic element is in contact with the driven hub, and the other end of the elastic element is in contact with the piston.

Preferably, the piston further includes a connecting portion extending from the main body portion in a direction of the friction plate assembly, the connecting portion being located radially outside of the driven hub, the connecting portion and the driven hub being connected by a spline, the piston and the driven hub being rotated synchronously.

Preferably, a first sealing ring and a second sealing ring are respectively arranged on two sides of the second cavity, the first sealing ring is arranged between the output shaft and the piston, and the second sealing ring is arranged between the output shaft and the pressure plate.

Preferably, the end face of the pressure plate is provided with a groove part, the groove part is concavely arranged from the end face close to one side of the input shaft to the direction of the power output box body, and the second oil duct is communicated with the groove part.

Preferably, a deep groove ball bearing is arranged between the output shaft and the driving hub, and a tapered roller bearing is arranged between the output shaft and the power output box body.

Preferably, the driving hub comprises an inclined oil duct extending from the deep groove ball bearing to the outside of the driving hub, and a limiting block is arranged between the pressure plate and the tapered roller bearing.

Preferably, a limiting plate is arranged at one end, close to the input shaft, of the output shaft, the limiting plate is fixed at the end of the output shaft through a bolt and used for fixing the deep groove ball bearing, and the brake plate is fixed on the power output box body through a bolt.

Compared with the prior art, the wet clutch provided by the utility model has the following beneficial effects:

In the process of transmitting power by the clutch, the driven hub, the piston, the pressure plate and the output shaft always keep synchronous rotation without rotating speed difference, thereby solving the problem of accelerated abrasion of the sealing element of the piston due to relative rotation.

Drawings

The utility model is described in further detail below with reference to the attached drawings and detailed description:

FIG. 1 is a cross-sectional view of a wet clutch of the present utility model;

FIG. 2 is an enlarged view of a portion of the wet clutch of the present utility model;

fig. 3 is an exploded view of the wet clutch of the present utility model.

Detailed Description

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

For the sake of simplicity of the drawing, the parts relevant to the present utility model are shown only schematically in the figures, which do not represent the actual structure thereof as a product. Additionally, in order to simplify the drawing for ease of understanding, components having the same structure or function in some of the drawings are shown schematically with only one of them, or only one of them is labeled. Herein, "a" means not only "only this one" but also "more than one" case.

It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

In this context, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In addition, in the description of the present application, the terms "first," "second," and the like are used merely to distinguish between descriptions and are not to be construed as indicating or implying relative importance.

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following description will explain the specific embodiments of the present utility model with reference to the accompanying drawings. It is evident that the drawings in the following description are only examples of the utility model, from which other drawings and other embodiments can be obtained by a person skilled in the art without inventive effort.

Referring to fig. 1 and 2, the present utility model provides a wet clutch including: the power output box 1, the input shaft 2, the driving hub 3, the output shaft 4, the driven hub 5, the friction plate assembly 6, the piston 7, the pressure plate 8 and the connecting pin 9. The input shaft 2 and the output shaft 4 are coaxially arranged, and the input shaft 2 and the driving hub 3 are connected through a spline and synchronously rotate. The output shaft 4 and the driven hub 5 are also spline-connected and rotate synchronously.

The end of the driven hub 5, which is close to the input shaft 2, is provided with a baffle plate 52, and the other end of the driven hub 5, which is close to the power output box 1, is provided with a piston 7. The friction plate assembly 6 is disposed between the baffle 52 and the piston 7. The friction plate assembly 6 comprises a friction plate and a driven plate, wherein the friction plate is fixed with the driving hub 3, and the driven plate is fixed with the driven hub 5; or the friction plate is fixed with the driven hub 5, and the driven disc is fixed with the driving hub 3. The piston 7 moves to the left to tighten the friction plate and the driven disc, and the power of the driving hub 3 is transmitted to the driven hub 5.

Referring to fig. 3, the piston 7 is sleeved on the output shaft 4, and a first sealing ring 43 is arranged between the piston 7 and the output shaft 4. The piston 7 includes a main body portion 73 extending in the radial direction of the output shaft 4, an extension portion 74 extending from the main body portion 73 in the direction of the power output case 1, and a connection portion 75 extending from the main body portion 73 in the direction of the friction plate assembly 6. The connecting part 75 is sleeved on the radial outer side of the driven hub 5, the connecting part 75 is connected with the driven hub 5 through a spline, and the piston 7, the driven hub 5 and the output shaft 4 synchronously rotate.

The pressure plate 8 is fitted over the output shaft 4 and is disposed within the extension 74. Extension 74 includes a sealing surface 742 that contacts the circumferential surface of platen 8. The circumferential surface of the pressure plate 8 is provided with an annular groove, in which a seal 82 is provided, the seal 82 being located between the sealing surface 742 and the circumferential surface of the pressure plate 8. A connecting pin 9 is arranged between the piston 7 and the pressure plate 8, counter bores are arranged on the piston 7 and the pressure plate 8, the connecting pin 9 is arranged in the counter bores, and the axis of the connecting pin 9 is parallel to the axis of the output shaft 4. Due to the provision of the connecting pin 9, the piston 7 and the pressure plate 8 can be rotated synchronously.

A first cavity 71 is arranged between the driven hub 5 and the piston 7, and a second cavity 72 is arranged between the piston 7 and the pressure plate 8. The output shaft 4 includes a first oil passage 41 communicating with the first cavity 71 and a second oil passage 42 communicating with the second cavity 72. The first chamber 71 is provided with an elastic member 51, and one end of the elastic member 51 is in contact with the driven hub 5 and the other end is in contact with the piston 7. The elastic element 51 is a spring in this embodiment. The lubricating oil of the first oil passage 41 flows outward after entering the first cavity 71 to lubricate the piston 7, the main hub 3, and the like.

The platen 8 is provided with a groove 81 on an end surface thereof adjacent to the input shaft 2, and the groove 81 is recessed from the driven hub 5 in a direction of the power output housing 1. The second oil passage 42 communicates with the groove portion 81. The oil in the second oil passage 42 flows into the second chamber 72, and the second chamber 72 expands due to the increase in oil pressure, pushing the piston 7 to move toward the friction disc assembly 6 and gradually pressing the friction disc assembly 6, and the friction disc assembly 6 is transmitted to the driven hub 5 in combination with the power of the driving hub 3.

The oil in the second chamber 72 flows out of the second oil passage 42, and as the oil pressure in the second chamber 72 gradually decreases, the force of the elastic element 51 is greater than the pressure of the oil in the second chamber 72, the elastic element 51 pushes the piston 7 in the direction of the pressure plate 8, the pressure of the piston 7 applied to the friction plate assembly 6 decreases, and the friction plate assembly 6 separates the power between the driving hub 3 and the driven hub 5 from each other.

According to the utility model, the piston 7 and the pressure plate 8 synchronously rotate through the arrangement of the connecting pin 9, so that the abrasion of the sealing element 82 caused by the rotation speed difference generated between the piston 7 and the pressure plate 8 is avoided, and the tightness of the second cavity 72 and the performance of the wet clutch are influenced.

The end face of the power output box body 1, which is close to one side of the piston 7, is provided with a brake block 11. Extension 74 includes a stop surface 71 radially outward of pressure plate 8 and perpendicular to sealing surface 742. When the clutch is disengaged, the piston 7 moves in the direction of the power output housing 1 until the braking surface 741 comes into contact with the brake pad 11. The brake pad 11 is fixed to the power output housing 1 by bolts, and when the brake surface 741 is in contact with the brake pad 11, the brake pad 11 provides a large friction force to stop the rotation of the piston 7. The driven hub 5, the piston 7, the pressure plate 8 and the output shaft 4 always keep rotating synchronously or stop rotating simultaneously.

Referring to fig. 1, a first sealing ring 43 is arranged between the piston 7 and the output shaft 4, and a second sealing ring 44 is arranged between the pressure plate 8 and the output shaft 4, so that good sealing performance of the second cavity 72 is ensured. Tapered roller bearings 12 are arranged between the output shaft 4 and the power output box body 1, and deep groove ball bearings 32 are arranged between the output shaft 4 and the driving hub 3. The driving hub 3 is also provided with an inclined oil passage 31 extending obliquely outwards from the deep groove ball bearing 32. The end of the output shaft 4, which is close to the input shaft 2, is provided with a limiting plate 45, the limiting plate 45 is fixed on the output shaft 4 through bolts, and the limiting plate 45 is used for fixing the deep groove ball bearing 32.

The driven hub 5 is provided with a baffle plate 52 at one end close to the input shaft 2, the friction plate assembly 6 is arranged between the baffle plate 52 and the piston 7, and the friction plate assembly 6 is pressed by the piston 7 and the baffle plate 52 together when moving towards the direction of the input shaft 2. A limiting block 121 is arranged between the pressure plate 8 and the tapered roller bearing 12, and the limiting block 121 is used for fixing the pressure plate 8, ensuring that the pressure plate 8 is not contacted with the power output box body 1 and fixing the tapered roller bearing 121.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present utility model without departing from the spirit and scope of the utility model. Therefore, it is intended that the present utility model cover the modifications and variations of this utility model provided they come within the scope of the appended claims and their equivalents.

Claims

1. A wet clutch, comprising: a power output box; an input shaft and a drive hub that rotate synchronously; an output shaft and a driven hub which rotate synchronously; establish the friction disc subassembly between initiative hub and driven hub, initiative hub power passes through the friction disc subassembly and transmits to driven hub when the friction disc subassembly combines, and transmission between initiative hub and the driven hub is disconnected when the friction disc subassembly separates, its characterized in that still includes:

2. The wet clutch according to claim 1, wherein the power output housing is provided with a brake pad on an end face of a side thereof adjacent to the piston, the piston includes a main body portion extending in a radial direction of the output shaft and an extension portion extending from the main body portion toward the pressure plate side in an axial direction of the output shaft, and the extension portion includes a braking surface disposed in parallel with the brake pad.

3. The wet clutch of claim 2 wherein the extension further comprises a sealing surface adjacent the braking surface, the radially outer end of the pressure plate being provided with a seal, the seal being disposed between the pressure plate and the sealing surface.

4. A wet clutch as described in claim 3 wherein a baffle is provided at an end of the driven hub adjacent the input shaft, the friction plate assembly is provided between the baffle and the piston, an elastic member is provided in the first chamber, one end of the elastic member is in contact with the driven hub, and the other end of the elastic member is in contact with the piston.

5. The wet clutch of claim 4 wherein the piston further comprises a connecting portion extending from the main body portion in the direction of the friction plate assembly, the connecting portion being radially outward of the driven hub, the connecting portion and the driven hub being connected by a spline, the piston and the driven hub rotating in unison.

6. The wet clutch of claim 5, wherein a first seal ring and a second seal ring are disposed on both sides of the second cavity, respectively, the first seal ring being disposed between the output shaft and the piston, and the second seal ring being disposed between the output shaft and the pressure plate.

7. The wet clutch according to claim 6, wherein an end surface of the pressure plate is provided with a groove portion recessed from an end surface on a side close to the input shaft toward the power output case, and the second oil passage communicates with the groove portion.

8. The wet clutch of claim 7 wherein a deep groove ball bearing is disposed between the output shaft and the drive hub and a tapered roller bearing is disposed between the output shaft and the power take-off housing.

9. The wet clutch of claim 8 wherein the drive hub includes a canted oil passage extending from the deep groove ball bearing obliquely outward of the drive hub, and a stopper is provided between the pressure plate and the tapered roller bearing.

10. The wet clutch of claim 9, wherein a limiting plate is arranged at one end of the output shaft close to the input shaft, the limiting plate is fixed at the end of the output shaft through a bolt for fixing the deep groove ball bearing, and the brake plate is fixed on the power output box through a bolt.