CN218408235U

CN218408235U - Wet-type PTO clutch assembly

Info

Publication number: CN218408235U
Application number: CN202222803299.7U
Authority: CN
Inventors: 常超; 唐瑜
Original assignee: Rongcheng Huanghai Clutch Co ltd
Current assignee: Rongcheng Huanghai Clutch Co ltd
Priority date: 2022-10-24
Filing date: 2022-10-24
Publication date: 2023-01-31
Anticipated expiration: 2032-10-24

Abstract

The utility model provides a wet-type PTO clutch assembly, including input shaft, cylinder body, box, working oil circuit, lubricated oil circuit, input shaft one end is established in the box, the cylinder body suit is in the input shaft outside, the cylinder body is equipped with the inner chamber, be equipped with the piston in the inner chamber, the piston right side is equipped with the drive friction subassembly, the piston left side is equipped with the braking friction subassembly, the braking friction subassembly is established between the cylinder body and the box, be equipped with wheel hub on the input shaft, the drive friction subassembly is established between the cylinder body and wheel hub; the right side of the piston is provided with a return spring, a working oil cavity is arranged between the piston and the inner cavity of the cylinder body, the working oil way is communicated with the working oil cavity, and the lubricating oil way is communicated with the driving friction assembly. The technical problems that an existing dry clutch is large in size and short in service life of a friction pair are solved. The utility model discloses but wide application is in agricultural machine.

Description

Wet-type PTO clutch assembly

Technical Field

The utility model relates to a clutch assembly especially relates to a wet-type PTO clutch assembly.

Background

In the traditional dry friction type clutch assembly of an automobile, engineering machinery, a tractor and the like, a clutch pedal is stepped to operate a separating mechanism to push and pull a separating system so as to realize the output and interruption of the torque of a transmission system, particularly in the aspects of agricultural equipment and engineering machinery, an operator needs frequent operation, and the operation steps in a short time are various, so that the physical consumption is large. And after the clutch is separated and torque output is cut off, because the moment of inertia of the load part is large, the time consumed for the load mechanism to stop is long, safety accidents are easily caused in the process, in addition, the service life is short due to friction temperature rise in the running process, and the use cost is improved. In addition, the input end and the output end of the existing clutch assembly are in different directions, and the structural installation requirement can be met only by a larger arrangement space.

Disclosure of Invention

The utility model discloses a for the technical problem that current clutch assembly operating procedure is various, operator's physical demands is big, braking time is long, life is short, and the incorgruous structure of input and output need occupy great space, provide a wet-type PTO clutch assembly that easy operation, operation physical demands are little, braking time is short, long service life, the syntropy occupation space of input and output is little.

Therefore, the technical scheme of the utility model is that, a wet-type PTO clutch assembly, including input shaft, cylinder body, box, working oil circuit, lubricating oil circuit, input shaft one end is established in the box, the cylinder body suit is in the input shaft outside, the cylinder body is equipped with the inner chamber, be equipped with the piston in the inner chamber, the piston right side is equipped with the drive friction subassembly, the piston left side is equipped with the braking friction subassembly, the braking friction subassembly is established between the cylinder body and the box, be equipped with wheel hub on the input shaft, the drive friction subassembly is established between the cylinder body and wheel hub; the right side of the piston is provided with a return spring, a working oil cavity is arranged between the piston and the inner cavity of the cylinder body, the working oil way is communicated with the working oil cavity, and the lubricating oil way is communicated with the driving friction assembly.

Preferably, the cylinder body includes an output shaft and a clutch hub, the output shaft and the clutch hub are fixedly connected, a gap is formed between the output shaft and the input shaft to enable the output shaft and the input shaft to rotate relative to each other, an elastic retainer ring D is arranged on the input shaft to limit axial outer side movement of the output shaft, a thrust needle roller bearing is arranged between the output shaft and the hub, and a thrust washer is arranged between the thrust needle roller bearing and the output shaft to limit axial inner side movement of the output shaft.

Preferably, the box body is provided with a working oil inlet and a lubricating oil inlet.

Preferably, the driving friction assembly comprises steel sheets a and friction sheets a, the friction sheets a and the steel sheets a are arranged in a staggered manner, the number of the steel sheets a and the number of the friction sheets a are adjustable, the steel sheets a are radially fixed relative to the cylinder body, the friction sheets a are radially fixed relative to the hub, and the hub is radially fixed relative to the input shaft; the brake friction assembly comprises brake friction plates B and brake steel sheets B, the brake friction plates B and the brake steel sheets B are alternately arranged, and the brake friction plates B are radially fixed relative to the box body; the friction plate A, the steel plate A, the brake friction plate B and the brake steel plate B can axially move.

Preferably, the hub is connected with the input shaft through a spline, and the hub is connected with the friction plate a of the driving friction assembly through a spline.

Preferably, paper-based materials or copper-based powder metallurgy materials are arranged on two sides of the friction plate A and the brake friction plate B.

Preferably, the cylinder body is provided with a retaining ring, an elastic retaining ring A for a shaft and an elastic retaining ring B for the shaft, the right side of the driving friction assembly is provided with a baffle plate, and the retaining ring is arranged on the right side of the baffle plate and used for limiting the driving friction assembly; the elastic retainer ring A for the shaft is arranged on the left side of the braking friction assembly and used for limiting the braking friction assembly; a spring baffle is arranged at the right end of the return spring and the left end of the elastic retainer ring B, and the elastic retainer ring B is used for limiting the spring baffle; the input shaft is provided with a circlip C for the shaft, and the circlip C for the shaft is positioned on the left side of the hub and used for limiting the axial inner side of the hub to move.

Preferably, a sealing ring A is arranged at the joint of the inner hole of the piston and the inner cavity of the cylinder body, and a sealing ring B is arranged at the joint of the excircle of the piston and the inner hole of the cylinder body; and a sealing ring A is arranged between the cylinder body and the input shaft, and a sealing ring B is arranged between the cylinder body and the box body.

The utility model discloses beneficial effect is:

(1) The cylinder body comprises the output shaft and the clutch hub, and the output shaft does not need to be additionally arranged, so that the cost is reduced, the structure is simplified, the assembly procedures are reduced, and the production efficiency is improved;

(2) The output shaft and the input shaft of the cylinder body are arranged in the same direction, so that the input and the output can be simultaneously input and output, the structure is compact, the space is saved to a great extent, and the maintenance is more convenient;

(3) Through the arrangement of the sealing ring and the sealing ring, a closed lubricating oil path and a closed working oil path are formed, and the safety and reliability of oil supply of a system are ensured.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is a schematic view of the brake friction plate B and the box body according to the embodiment of the present invention.

The symbols in the drawings illustrate that:

1. an input shaft; 2. a cylinder body; 3. a sealing ring A;4. a seal ring B;5. a piston; 6. a sealing ring A;7. a seal ring B;8. braking a steel sheet B;9. a brake friction plate B;10. a steel sheet A;11. a friction plate A;12. a baffle plate; 13. a retainer ring; 14; a return spring; 15. a spring baffle; 16. a hub; 17. a deep groove ball bearing; 18. a thrust washer; 19. a thrust needle bearing; 20. a circlip for a shaft A;21. a circlip B for shaft; 22. a circlip for shaft C;23. a circlip D for shaft; 24. a sealing plug; 25. a box body; 26. a lubricating oil cavity; 27. a working oil chamber; 28. deep holes A;29. deep holes B;30. a lubricating oil hole A;31. a lubricating oil hole B;32. a lubricating oil hole C;33. an oil discharge hole D;34. a lubricating oil hole E;35. an oil hole A;36. an oil hole B;37. an oil hole C;38. a lubricant inlet; 39. a working oil inlet; 40. a six-lug boss; 41. a boss A;42. and (4) a groove.

Detailed Description

The present invention will be further described with reference to the following examples.

As shown in fig. 1-2, a wet PTO clutch assembly includes a working oil path, a lubrication oil path, a driving friction member, and a braking friction member, and further includes a case 25, an input shaft 1, a cylinder 2, a piston 5, and a hub 16.

The cylinder body 2 comprises an output shaft and a clutch hub, the clutch hub is provided with an inner cavity, the piston 5 is arranged in the inner cavity of the clutch hub, a driving friction assembly is arranged on the right side of the piston 5 and comprises a steel sheet A10 and friction sheets A11, the steel sheet A10 and the friction sheets A11 are alternately arranged, the number of the steel sheet A10 and the number of the friction sheets A11 are adjustable, and the capacity of transmitting torque can be improved by increasing the number of the driving friction assemblies under the condition that the working pressure is unchanged. The right side of the driving friction assembly is provided with a baffle plate 12, the driving friction assembly and the baffle plate 12 are fixed on the cylinder body 2 by a retainer ring 13, and the gap between the steel sheet A10 and the friction sheet A11 can be adjusted by adjusting the thickness of the baffle plate 12. Since the friction plate a11 is fixed to the hub 16 in the radial direction and the hub 16 is fixed to the input shaft 1 in the radial direction, the friction plate a11 is fixed to the input shaft 1 in the radial direction.

The braking friction assembly is arranged on the left side of the piston 5 and the outer circle of the cylinder body 2 and comprises a braking steel sheet B8 and a braking friction sheet B9, the braking steel sheet B8 and the braking friction sheet B9 are alternately arranged, and the number of the braking friction assemblies is adjustable. And the left side of the brake steel sheet B8 is provided with an elastic retainer ring A20 for a shaft, and the elastic retainer ring is used for limiting the brake friction assembly. The brake friction plate B9 is provided with a boss A41, the box body 25 is provided with a groove 42, and the boss A41 is matched with the groove 42 to ensure that the brake friction plate B9 only can move axially and cannot rotate along with the cylinder body 2. The two sides of the friction plate A11 and the brake friction plate B9 are both provided with paper-based materials or copper-based powder metallurgy materials with larger friction factors.

The external spline of the input shaft 1 is connected with the internal spline of the hub 16, the output shaft of the cylinder body 2 is used for outputting torque, the driving friction assembly is used for connecting the hub 16 and the cylinder body 2, and the braking friction assembly is used for connecting the cylinder body 2 and the box body 25.

The input shaft 1 is provided with a shaft elastic retainer ring C22 and two shaft elastic retainer rings D23 which are respectively used for limiting the hub 16, the cylinder body 2 and the deep groove ball bearing 17; the cylinder body 2 is positioned on the right side of an elastic retainer ring D23 for one shaft; the wheel hub 16 and the deep groove ball bearing 17 are positioned between the elastic retainer ring C22 for the shaft and the elastic retainer ring D23 for the other shaft, and the deep groove ball bearing 17 is positioned on the right side of the wheel hub 16; two thrust washers 18 and a set of thrust needle bearings 19 are provided between the cylinder block 2 and the hub 16, and the thrust needle bearings 19 are provided between the two thrust washers 18.

The input shaft 1 is provided with a sealing device, and the sealing device comprises a sealing plug 24, a sealing ring A6 and a sealing ring B7 which are used for sealing a working oil path. The sealing ring A6 is positioned at the joint of the excircle of the input shaft 1 and the inner cavity of the cylinder body 2, and the sealing ring B7 is positioned at the joint of the excircle of the input shaft 1 and the inner cavity of the box body 25.

The inner end of the right side of the cylinder body 2 is provided with a shaft elastic retainer B21 for fixing a spring baffle 15 and a return spring 14, the baffle 15 is positioned on the left side of the shaft elastic retainer B21, and the return spring 14 is positioned between the baffle 15 and the piston 5; a sealing ring B4 and a sealing ring A3 are arranged between the piston 5 and the cylinder body 2, the sealing ring B4 is positioned at the joint of the excircle of the piston 5 and the inner cavity of the cylinder body 2, the sealing ring A3 is positioned at the joint of the inner cavity of the cylinder body 2 and the inner hole of the piston 5, and sealing is ensured by sealing devices at the two positions, so that the piston 5 and the cylinder body 2 form a closed working oil cavity 27 which is communicated with a working oil circuit. The working oil path inlet 39 and the lubricating oil path inlet 38 are both provided on the case 25, and the lubricating oil path is communicated with the driving friction assembly and the braking friction assembly.

The working principle of the wet PTO clutch assembly is as follows: the hydraulic control system gives an electric signal combined with the clutch, and the electromagnetic valve is controlled by the electric signal to supply oil to the working oil way; hydraulic oil enters the working oil cavity 27 from a working oil path inlet 39 through the oil hole A35, the deep hole B29, the oil hole B36 and the oil hole C37, the piston 5 is pushed to move rightwards against the pressing force of the return spring 14, the steel sheet A10, the friction sheet A11 and the baffle plate 12 are pressed tightly to be in a combined state, the input shaft 1 is connected with the cylinder body 2 into a whole through the hub 16 due to the friction force between the steel sheet A10 and the friction sheet A11, torque is transmitted to the cylinder body 2 through the input shaft 1 via the hub 16 and then via the driving friction assembly, and the cylinder body 2 outputs power.

When the clutch is required to be separated, an electric signal for separating the clutch is given by a hydraulic control system, the electromagnetic valve is controlled by the electric signal to stop supplying oil to the working oil way, the pressure in the working oil cavity 27 is relieved, the piston 5 moves leftwards under the action of the spring force of the return spring 14, the steel sheet A10 and the friction sheet A11 generate a gap to be separated, so that the separation state is realized, no friction exists between the steel sheet A10 and the friction sheet A11, and the torque transmission is interrupted.

The piston 5 is provided with a six-lug boss 40, the six-lug boss 40 is arranged at the left side close to the brake friction plate B9, when the six-lug boss moves rightwards, the brake steel sheet B8 and the brake friction plate B9 are not pressed, and the brake steel sheet B8 and the brake friction plate B9 are separated; when the piston 5 moves leftward to press the brake pad B8, a frictional force is generated between the brake pad B8 and the brake pad B9, thereby providing a braking torque to the driven portion.

No matter the clutch is in a separation state or a combination state, the hydraulic oil of the lubricating oil path is continuously supplied, and the method specifically comprises the following steps: hydraulic oil passes through the deep hole a28 along the lubricating oil path inlet 38 of the box 25, one part of the hydraulic oil passes through the lubricating oil hole B31 to lubricate the deep groove ball bearing 17, and the other part of the hydraulic oil enters the lubricating oil cavity 26 through the lubricating oil hole a30 and the lubricating oil hole C32 and then passes through the lubricating oil hole E34 to lubricate the driving friction assembly. Lubricating oil grooves with certain depths are formed in the surfaces of the friction materials on the two sides of the friction plate A11, and the lubricating oil passes through gaps in the friction plate A11 and the steel sheet A10 to exchange heat. And then the lubricating oil flows back to the bottom of the oil pool, so that one lubricating and cooling cycle is completed. The method and the device are repeated, the temperature of the clutch steel sheet A10 and the friction sheet A11 is always kept within a reasonable range, the phenomena of ablation and the like caused by overhigh temperature of a friction element under the condition that the clutch is frequently switched can be effectively avoided, and the service life of the clutch is prolonged.

The utility model provides a transmission structure supports input, output with advancing with going out and compact structure, and occupation space is less, and the output shaft has also been saved in the time of the cost is practiced thrift to the direct substitution output shaft of cylinder body 2.

However, the above description is only an example of the present invention, and the scope of the present invention should not be limited thereto, so that the replacement of the equivalent component or the equivalent change and modification made according to the protection scope of the present invention should be included in the scope of the present invention.

Claims

1. A wet-type PTO clutch assembly is characterized by comprising an input shaft, a cylinder body, a box body, a working oil way and a lubricating oil way, wherein one end of the input shaft is arranged in the box body, the cylinder body is sleeved outside the input shaft, the cylinder body is provided with an inner cavity, a piston is arranged in the inner cavity, a driving friction component is arranged on the right side of the piston, a braking friction component is arranged on the left side of the piston, the braking friction component is arranged between the cylinder body and the box body, a hub is arranged on the input shaft, and the driving friction component is arranged between the cylinder body and the hub; the right side of the piston is provided with a return spring, a working oil cavity is arranged between the piston and the inner cavity of the cylinder body, the working oil way is communicated with the working oil cavity, and the lubricating oil way is communicated with the driving friction assembly.

2. The wet PTO clutch assembly of claim 1, wherein the cylinder block comprises an output shaft and a clutch hub, the output shaft and the clutch hub are fixedly coupled, a gap is provided between the output shaft and the input shaft to enable the output shaft and the input shaft to rotate relative to each other, a circlip D is provided on the input shaft to limit the axial outer movement of the output shaft, a thrust needle bearing is provided between the output shaft and the hub, and a thrust washer is provided between the thrust needle bearing and the output shaft to limit the axial inner movement of the output shaft.

3. The wet PTO clutch assembly of claim 1, wherein the housing defines a working oil inlet and a lubrication oil inlet.

4. The wet PTO clutch assembly of claim 1, wherein the driving friction component comprises a steel disc a and a friction disc a, the friction disc a being interleaved with the steel disc a, the steel disc a and the friction disc a being adjustable in number, the steel disc a being radially fixed with respect to the cylinder block, the friction disc a being radially fixed with respect to the hub, the hub being radially fixed with respect to the input shaft; the brake friction assembly comprises brake friction plates B and brake steel sheets B, the brake friction plates B and the brake steel sheets B are alternately arranged, and the brake friction plates B are radially fixed relative to the box body; the friction plate A, the steel sheet A, the brake friction plate B and the brake steel sheet B can axially move.

5. The wet PTO clutch assembly of claim 1, wherein the hub is splined to the input shaft and the hub is splined to friction plate a of the driving friction assembly.

6. The wet PTO clutch assembly of claim 4, wherein both sides of the friction pad a and the brake friction pad B are provided with a paper-based material or a copper-based powder metallurgy material.

7. The wet PTO clutch assembly of claim 1, wherein the cylinder block is provided with a retainer ring, a circlip a for a shaft, and a circlip B for a shaft, wherein a stopper is provided on a right side of the driving friction member, and the retainer ring is provided on the right side of the stopper and is used for limiting the driving friction member; the elastic retainer ring A for the shaft is arranged on the left side of the braking friction assembly and used for limiting the braking friction assembly; a spring baffle is arranged at the right end of the return spring, and the elastic retainer ring B is used for limiting the spring baffle; the input shaft is provided with a shaft elastic check ring C, and the shaft elastic check ring C is located on the left side of the hub and used for limiting the hub.

8. The wet PTO clutch assembly of claim 1, wherein a seal ring a is disposed at a junction of the piston bore and the cylinder bore, and a seal ring B is disposed at a junction of the piston outer circumference and the cylinder bore; and a sealing ring A is arranged between the cylinder body and the input shaft, and a sealing ring B is arranged between the cylinder body and the box body.