CN216199978U

CN216199978U - Wet-type main clutch assembly and tractor

Info

Publication number: CN216199978U
Application number: CN202122634388.9U
Authority: CN
Inventors: 张迎军; 张卫亮; 陈亚欢; 戍月升; 李兴和
Original assignee: Guangdong Haoyun Technology Co Ltd
Current assignee: Guangdong Haoyun Technology Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-04-05
Anticipated expiration: 2031-10-29

Abstract

The utility model relates to the field of agricultural machinery, in particular to a wet main clutch assembly and a tractor, wherein the wet main clutch assembly comprises a driving shaft, a driving shell, a piston, a friction plate component and a driven hub which are coaxially arranged; the driving shell is fixedly connected with the driving shaft, a clutch cavity is arranged in the driving shell, and the piston, the friction plate assembly and the driven hub are arranged in the clutch cavity; the friction plate assembly is connected with the driving shell so as to drive the driving shell to synchronously rotate and axially move relative to the rotating shaft of the driving shell; the piston is fixedly connected with the driven hub; the tip of driving shaft is equipped with first output spline, is equipped with the second output spline with the coaxial setting of first output spline on the driven hub. The wet main clutch assembly adopts a double-spline power output structure, so that the connection structure is more compact, and the maintenance performance is improved. The tractor applies the wet main clutch assembly, thereby having corresponding beneficial effects.

Description

Wet-type main clutch assembly and tractor

Technical Field

The utility model relates to the field of agricultural machinery, in particular to a wet main clutch assembly and a tractor.

Background

For special equipment (such as a tractor), power needs to be provided to drive the tractor to move forward and power needs to be provided to drive the rotation of an agricultural implement, so that at least one power input and two power outputs are required, wherein a plurality of wet clutches are needed, and two power outputs of the existing wet clutch mechanism are usually connected through a spline and a gear, the gear is arranged on the outer side of a shell of the wet clutch mechanism, and the spline is arranged on a central shaft, so that a connecting structure with the outside is too bulky and is not convenient to maintain.

Disclosure of Invention

The utility model aims to provide a wet main clutch assembly, which adopts a double-spline power output structure, the power output positions are close to the center of a rotating shaft of the wet main clutch assembly, the connection structure is more compact, and the assembly operation is simpler and the maintenance performance is improved due to the same type of transmission connection.

Based on the above, the utility model provides a wet main clutch assembly, which comprises a driving shaft, a driving shell, a piston, a friction plate component and a driven hub, wherein the driving shaft, the driving shell, the piston, the friction plate component and the driven hub are coaxially arranged;

the driving shell is fixedly connected with the driving shaft, a clutch cavity is arranged in the driving shell, and the piston, the friction plate assembly and the driven hub are arranged in the clutch cavity;

the friction plate assembly is connected with the driving shell so as to drive the driving shell to synchronously rotate and axially move relative to a rotating shaft of the driving shell;

the piston is fixedly connected with the driven hub and can push the friction plate assembly to be in contact with the driving shell through axial movement, so that the driven hub is driven to rotate along with the rotation of the driving shell;

the end of the driving shaft is provided with a first output spline, and the driven hub is provided with a second output spline which is coaxial with the first output spline.

In the wet main clutch assembly, the driving housing is provided with a first mounting hole and a second mounting hole at opposite axial ends, the driving shaft is embedded in the first mounting hole, and the driven hub is embedded in the second mounting hole.

In the wet main clutch assembly, the driven hub includes a first step portion and a second step portion having a radial dimension smaller than that of the first step portion, the second step portion is located in the second mounting hole and is connected to the driving housing through a bearing, and the first step portion is located in the clutch cavity.

According to the wet-type main clutch assembly, the driving shell is fixedly connected with the driving shaft through the first bolt.

The wet main clutch assembly as described above, the driving housing includes a driving hub and a blocking cover support, the driving hub and the blocking cover support are connected by a second bolt, and the friction plate assembly is in contact with the blocking cover support under the action of the piston.

The wet main clutch assembly is characterized in that the driving shaft is provided with a mounting flange connected with the driving shell and a blocking protrusion located at one end close to the clutch cavity, the piston is sleeved on the driving shaft and located between the mounting flange and the blocking protrusion, and a return spring used for jacking the piston towards the direction far away from the friction plate assembly is arranged between the piston and the blocking protrusion.

In the wet master clutch assembly as described above, the friction plate assembly includes steel plates and friction plates which are alternately stacked.

According to the wet-type main clutch assembly, a first sealing ring is arranged between the driving shell and the piston, a second sealing ring is arranged between the piston and the driving shaft, a third sealing ring is arranged between the driving shaft and the driving shell, so that a driving hydraulic cavity is formed by enclosing the driving shell, the piston and the driving shaft, and a driving oil path communicated with the driving hydraulic cavity is arranged on the driving shaft.

According to the wet-type main clutch assembly, a lubricating oil cavity is further formed among the driving shell, the piston and the driving shaft, an oil injection port facing the friction plate assembly is formed in the lubricating oil cavity, and a lubricating oil way communicated with the lubricating oil cavity is formed in the driving shaft.

The embodiment of the utility model has the following beneficial effects:

1. this wet-type main clutch assembly adopts the power take off structure that is the double spline, and the power take off position all is close to the pivot center of wet-type main clutch assembly, and connection structure is compacter, and the transmission of the same type is connected and is made assembly operation simpler, has improved and has maintained the performance.

2. The driving shell and the driving shaft are of a split bolt connection structure, and compared with a traditional integrated welding structure, the driving shell and the driving shaft are reduced in processing difficulty and production cost and more convenient to maintain.

3. For traditional circlip is spacing, adopt the fender lid support to carry on spacingly to the friction disc subassembly, the intensity of locating part is higher, and the friction disc clearance adjustment in the friction disc subassembly is more convenient, is convenient for maintain.

The embodiment also provides a tractor, which comprises a tractor body, wherein the tractor body is provided with the wet main clutch assembly. The wet main clutch assembly is applied, and therefore, the wet main clutch assembly has corresponding beneficial effects.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic cross-sectional view of a wet master clutch assembly according to an embodiment of the present invention.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Fig. 3 is another sectional view schematically showing the driving shaft of fig. 1.

Fig. 4 is a schematic cross-sectional view of the active hub of fig. 1.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 and 2, the embodiment of the utility model provides a wet main clutch assembly, which is particularly suitable for a tractor, and comprises a driving shaft 1, a driving shell 2, a piston 3, a friction plate assembly 4 and a driven hub 5 which are coaxially arranged.

The driving shell 2 is fixedly connected with the driving shaft 1, a clutch cavity 21 is arranged in the driving shell 2, and the piston 3, the friction plate assembly 4 and the driven hub 5 are arranged in the clutch cavity 21.

The friction plate assembly 4 is connected with the driving shell 2 so as to drive the driving shell 2 to synchronously rotate and axially move relative to the rotating shaft of the driving shell 2.

The piston 3 is fixedly connected with the driven hub 5, and the piston 3 can push the friction plate assembly 4 to contact with the driving shell 2 through axial movement, so that the driven hub 5 is driven to rotate along with the rotation of the driving shell 2.

The end of the driving shaft 1 is provided with a first output spline 11, and the driven hub 5 is provided with a second output spline 50 coaxially arranged with the first output spline 11.

The first output spline 11 may be disposed on one end or both ends of the driving shaft 1, the friction plate assembly 4 includes steel plates 41 and friction plates 42 stacked alternately, the steel plates 41 are connected with the driving housing 2, and the friction plates 42 are connected with the driven hub 5.

The wet main clutch assembly is provided with two groups of power outputs, wherein one group of power outputs through the second output spline 50, and the other group of power outputs through the first output spline 11 on the driving shaft 1 directly. Specifically, during operation, the driving shaft 1 continuously rotates, the first output spline 11 on the driving shaft 1 directly outputs power for the part connected with the driving shaft, and the second output spline 50 on the driven hub 5 drives the driven hub 5 to rotate along with the driving shell 2 when the piston 3 pushes the friction plate assembly 4 to fully contact with the driving shell 2, and then the second output spline 50 rotates and outputs power for the part connected with the driven hub. It should be noted that, in order to avoid interference, the diameter of the second output spline 50 is larger than the diameter of the first output spline 11, and the second transmission member connected to the second output spline 50 needs to have a hollow structure, so that the first transmission member can conveniently pass through the hollow part of the second transmission member to be connected to and driven by the first output spline 11.

This wet-type main clutch assembly adopts the power take off structure of double spline, and the power take off position all is close to the pivot center of wet-type main clutch assembly, and connection structure is compacter, and the transmission of the same type is connected and is made assembly operation simpler, has improved and has maintained the maintenance performance. In addition, after the double-spline design is adopted, all moving parts become a module, the whole moving parts can be replaced, the modular design is convenient, and the maintenance convenience of the clutch assembly is obviously improved.

Further, the first output spline 11 is located in the clutch cavity 21, and the second output spline 50 is located on the same axial side of the first output spline 11 and has a radial dimension larger than that of the first output spline 11, so that the first output spline 11 and the second output spline 50 are respectively connected with the transmission member without mutual interference.

Further, the driving housing 2 is respectively provided with a first mounting hole 22 and a second mounting hole 23 at opposite axial ends, the driving shaft 1 is embedded in the first mounting hole 22, and the driven hub 5 is embedded in the second mounting hole 23. The structure is more compact.

Further, the driven hub 5 includes a first step portion 51 and a second step portion 52 having a smaller radial dimension than the first step portion 51, the second step portion 52 is located in the second mounting hole 23 and connected to the driving housing 2 through a bearing 6, and the first step portion 51 is located in the clutch chamber 21. The driven hub 5 with the stepped structure is connected with the driving shell 2 through the bearing 6, so that the connection is more compact, and the driven hub 5 can reliably rotate relative to the driving shell 2.

Wherein, the bearing 6 can be a ball bearing, and one side of the bearing 6 is provided with a retaining ring 61 for limiting the axial position of the driven hub 5.

As shown in fig. 3 and 4, the driving housing 2 and the driving shaft 1 are designed to be separated from each other, and are fixedly connected with each other by a first bolt. The driving shell 2 and the driving shaft 1 are of a split bolt connection structure, compared with a traditional integrated welding structure, the processing difficulty and the production cost are reduced, the maintenance is more convenient, and certainly, in order to further improve the positioning precision, a positioning pin can be added between the driving shell 2 and the driving shaft 1 to be connected.

Preferably, the driving housing 2 includes a driving hub 201 and a cover stop support 202, the driving hub 201 and the cover stop support 202 are connected by a second bolt, and the friction plate assembly 4 is in contact with the cover stop support 202 under the action of the piston 3.

For traditional circlip is spacing, this technical scheme adopts fender cover support 202 to carry on spacingly to friction disc subassembly 4, and the intensity of locating part is higher, and the friction disc clearance adjustment in the friction disc subassembly 4 is more convenient, is convenient for maintain, and adopts bolted connection between initiative hub 201 and the fender cover support 202, and accumulative error is less, and positioning accuracy is high, and production and processing precision is high. Of course, in order to further improve the positioning accuracy, a positioning pin may be added between the driving hub 201 and the shield support 202 for connection.

In this embodiment, be equipped with on the driving shaft 1 with the mounting flange 12 that the initiative casing 2 is connected and be located the fender arch 13 that is close to clutch chamber 21 one end, the cover of piston 3 is established on the driving shaft 1 and be located mounting flange 12 with keep off between the arch 13, piston 3 with keep off and be equipped with the reset spring 7 that is used for keeping away from piston 3 top pressure towards the direction of friction disc subassembly 4 between the arch 13. Specifically, the return spring 7 may be a belleville spring.

For realizing the hydraulic drive of wet-type main clutch assembly, initiative casing 2 with be equipped with first sealing washer 81 between the piston 3, piston 3 with be equipped with second sealing washer 82 between the driving shaft 1, driving shaft 1 with be equipped with third sealing washer 83 between the initiative casing 2, so that enclose between initiative casing 2, piston 3 and the driving shaft 1 and establish and form drive hydraulic pressure chamber 9, be equipped with on the driving shaft 1 with drive oil circuit 91 that drives hydraulic pressure chamber 9 intercommunication. The hydraulic system is communicated with the driving hydraulic cavity 9 through a driving oil path 91 to realize hydraulic driving.

Further, a lubricating oil cavity 92 is formed among the driving shell 2, the piston 3 and the driving shaft 1, an oil injection port 921 facing the friction plate assembly 4 is formed in the lubricating oil cavity 92, and a lubricating oil path 922 communicated with the lubricating oil cavity 92 is formed in the driving shaft 1. During lubrication, the lubricating oil cavity 92 is opened, low-pressure lubricating oil enters the lubricating oil cavity 92 through the lubricating oil channel 922 and is obliquely sprayed to the friction plate 42 through the oil spray opening 921 for lubrication. This lubricated oil circuit 922 reasonable in design, when the clutch assembly does not work, lubricated oil circuit 922 closes, reduces lubricating oil flow loss, improves the lubricating property of other positions.

To better understand the technical solution of the present embodiment, the working principle is further explained as follows:

the clutch combining process:

high-pressure hydraulic oil enters the driving hydraulic cavity 9 through the driving oil path 91, the pressure of the driving hydraulic cavity 9 is increased, the piston 3 is pushed to advance, the piston 3 presses the steel sheet 41 and the friction sheet 42 of the friction sheet assembly 4, power is transmitted to the steel sheet 41 from the driving hub 201, then is transmitted to the friction sheet 42, then is transmitted to the driven hub 5, and the power is transmitted out by the second output spline 50 in the driven hub 5; meanwhile, the driving shaft 1 continuously rotates, and the first output spline 11 on the driving shaft 1 directly outputs power.

The clutch separation process:

after the hydraulic oil of the driving oil path 91 is closed, the pressure of the driving hydraulic cavity 9 is reduced, the piston 3 moves leftwards under the action of the blocking protrusion 13 and the return spring 7, the steel sheet 41 is separated from the friction sheet 42, and the power is cut off.

It should be understood that the terms "first", "second", etc. are used herein to describe various information, but the information should not be limited to these terms, which are only used to distinguish one type of information from another. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention. Furthermore, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The foregoing is directed to the preferred embodiment of the present invention, and it is understood that various changes and modifications may be made by one skilled in the art without departing from the spirit of the utility model, and it is intended that such changes and modifications be considered as within the scope of the utility model.

Claims

1. A wet main clutch assembly is characterized by comprising a driving shaft (1), a driving shell (2), a piston (3), a friction plate component (4) and a driven hub (5) which are coaxially arranged;

the driving shell (2) is fixedly connected with the driving shaft (1), a clutch cavity (21) is formed in the driving shell (2), and the piston (3), the friction plate assembly (4) and the driven hub (5) are arranged in the clutch cavity (21);

the friction plate assembly (4) is connected with the driving shell (2) so as to drive the driving shell (2) to synchronously rotate and axially move relative to a rotating shaft of the driving shell (2);

the piston (3) is fixedly connected with the driven hub (5), and the piston (3) can push the friction plate assembly (4) to be in contact with the driving shell (2) through axial movement, so that the driven hub (5) is driven to rotate along with the rotation of the driving shell (2);

the end of the driving shaft (1) is provided with a first output spline (11), and the driven hub (5) is provided with a second output spline (50) which is coaxial with the first output spline (11).

2. The wet main clutch assembly according to claim 1, wherein the driving housing (2) is formed with a first mounting hole (22) and a second mounting hole (23) at opposite axial ends thereof, the driving shaft (1) is fitted into the first mounting hole (22), and the driven hub (5) is fitted into the second mounting hole (23).

3. A wet main clutch assembly according to claim 2, characterized in that the driven hub (5) comprises a first step portion (51) and a second step portion (52) having a smaller radial dimension than the first step portion (51), the second step portion (52) being located in the second mounting hole (23) and being connected with the driving housing (2) by a bearing (6), the first step portion (51) being located in the clutch chamber (21).

4. Wet master clutch assembly according to claim 1, characterized in that the drive housing (2) is fixedly connected with the drive shaft (1) by means of a first bolt.

5. Wet master clutch assembly according to claim 1, characterized in that the active housing (2) comprises an active hub (201) and a shield cover seat (202), the active hub (201) and the shield cover seat (202) being connected by a second bolt, the friction plate pack (4) being in contact with the shield cover seat (202) under the action of the piston (3).

6. The main wet clutch assembly according to claim 1, characterized in that the driving shaft (1) is provided with a mounting flange (12) connected to the driving housing (2) and a retaining protrusion (13) located at an end close to the clutch cavity (21), the piston (3) is sleeved on the driving shaft (1) and located between the mounting flange (12) and the retaining protrusion (13), and a return spring (7) for pressing the piston (3) in a direction away from the friction plate assembly (4) is arranged between the piston (3) and the retaining protrusion (13).

7. A wet master clutch assembly according to any one of claims 1 to 6, characterized in that the friction plate pack (4) comprises steel plates (41) and friction plates (42) stacked alternately.

8. The wet main clutch assembly according to any one of claims 1 to 6, wherein a first seal ring (81) is arranged between the driving housing (2) and the piston (3), a second seal ring (82) is arranged between the piston (3) and the driving shaft (1), a third seal ring (83) is arranged between the driving shaft (1) and the driving housing (2) so as to form a driving hydraulic cavity (9) by enclosing the driving housing (2), the piston (3) and the driving shaft (1), and a driving oil path (91) communicated with the driving hydraulic cavity (9) is arranged on the driving shaft (1).

9. The wet main clutch assembly according to claim 8, characterized in that a lubricating oil chamber (92) is formed between the piston (3) and the driving shaft (1), an oil injection port (921) facing the friction plate assembly (4) is formed on the lubricating oil chamber (92), and a lubricating oil passage (922) communicated with the lubricating oil chamber (92) is formed on the driving shaft (1).

10. A tractor comprising a tractor body, wherein the tractor body is provided with a wet main clutch assembly as claimed in any one of claims 1 to 9.