Internal structure of pneumatic clutch

Abstract

An internal structure of a pneumatic clutch comprises a shell, an input shaft, an output shaft, a friction plate assembly and a pushing and pressing assembly. The side, facing the output shaft, of the input shaft is provided with a circular ring part, and a plurality of inner grooves are formed in the circumferential inner side wall of the circular ring part at intervals. And a plurality of outer grooves are formed in the circumferential outer side wall, corresponding to the circular ring part, of the output shaft at intervals. The friction plate assembly comprises an outer friction plate and an inner friction plate. According to the internal structure of the pneumatic clutch, the outer teeth on the outer friction plates are clamped in the inner grooves in the input shaft, the inner teeth on the inner friction plates are clamped in the outer grooves, and under pushing or resetting of the pushing and pressing assembly, the outer friction plates and the inner friction plates which are arranged at intervals abut against each other or are disconnected. Therefore, power transmission between the engine and the gearbox is connected or disconnected. According to the internal structure of the pneumatic clutch, the service life of the clutch is prolonged through the arrangement of the outer friction plates and the inner friction plates.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of pneumatic clutch parts, in particular to an internal structure of a pneumatic clutch. BACKGROUND

[0002] In the heavy vehicle starting system, the pneumatic clutch plays a key role, and its main task is to transmit power when the engine starts, and effectively connect the engine and gearbox. As disclosed in Chinese patent CN202120911390.3, a pneumatic clutch and a series pneumatic clutch are disclosed, which comprises a hollow through shaft pipe and a cylinder body, a piston, a driving disc, a flange disc and an output wheel which are sequentially sleeved on the hollow through shaft pipe. The cylinder body is rotatably sleeved on the input end of the hollow through shaft pipe and is provided with a pressure source inlet, and the output wheel is rotatably sleeved on the output end of the hollow through shaft pipe. The piston is arranged to communicate with the pressure source inlet, so that when the pressure source is connected, the driving disc is pushed to move towards the flange disc, thereby rotating the output wheel through the flange disc, converting the axial rotation of the hollow through shaft pipe into the radial rotation of the output wheel. The driving disc and the flange disc are elastically connected by a separation spring, so that when the pressure source disappears, the driving disc automatically resets to stop outputting power to the outside. The pneumatic clutch is implemented as a main gear and a secondary gear by the main transmission member and the secondary transmission member, to realize the effect of gear transmission of the pneumatic clutch. However, the gear transmission will produce "shaking" phenomenon at the moment when the two gears mesh with each other, and cannot realize smooth clutch operation. SUMMARY

[0003] Therefore, the utility model provides an internal structure of a pneumatic clutch to solve the above problems.

[0004] The internal structure of a pneumatic clutch comprises a housing, an input shaft arranged on one side of the housing, an output shaft arranged on one side of the input shaft, a friction plate assembly arranged between the input shaft and the output shaft, and a push assembly arranged on one side of the friction plate assembly. The side of the input shaft facing the output shaft has a circular ring part, and a plurality of inner grooves are arranged on the inner side wall of the circular ring part in a spaced manner, and the length direction of the inner grooves is parallel to the arrangement direction of the input shaft and the output shaft. A plurality of outer grooves are arranged on the outer side wall of the circular ring part in a spaced manner, and the length direction of the outer grooves is parallel to the length direction of the inner grooves. The friction plate assembly comprises a plurality of outer friction plates arranged in a spaced manner, and a plurality of inner friction plates arranged on one side of the outer friction plates in a spaced manner. The outer friction plates and the inner friction plates are arranged in an interlaced and spaced manner, that is, one inner friction plate is arranged between every two adjacent outer friction plates. A plurality of outer teeth are arranged on the outer side wall of the outer friction plate in a spaced manner, and the plurality of outer teeth are correspondingly arranged in and clamped in the inner grooves on the input shaft. A plurality of inner teeth are arranged on the outer side wall of the inner friction plate in a spaced manner, and the plurality of inner teeth are correspondingly arranged in and clamped in the outer grooves on the output shaft.

[0005] Further, a cavity for placing the input shaft and the output shaft is formed in the housing, and the end of the input shaft away from the output shaft penetrates through the housing and is connected with an external engine.

[0006] Further, the end of the output shaft away from the input shaft is connected with an external gearbox.

[0007] Further, a plurality of bearings are arranged on the input shaft, and the outer side wall of the bearing abuts against the inner side wall of the housing.

[0008] Further, a reset groove is formed on the side of the output shaft facing the push assembly, and the length direction of the reset groove is parallel to the length direction of the inner groove.

[0009] Further, the push assembly comprises an air nozzle arranged on the housing, a pneumatic piston arranged on one side of the air nozzle, a pressure plate arranged on one side of the pneumatic piston, and at least two springs arranged on one side of the pressure plate, wherein the springs are arranged in the reset groove, one end of the spring abuts against the end of the pneumatic piston facing the pressure plate, and the other end of the spring abuts against the bottom surface in the reset groove.

[0010] Further, the air nozzle is connected with an external air supply module, and a closed air channel is formed between the output end of the air nozzle and the pneumatic piston, and the air channel is located on the side of the pneumatic piston away from the pressure plate.

[0011] Furthermore, the pressure plate has a protruding part on the side away from the pneumatic piston, and the end of the protruding part away from the pressure plate faces the friction plate assembly.

[0012] Compared with the prior art, the pneumatic clutch provided by this utility model has an internal structure in which the external teeth on the external friction plate are engaged in the inner groove on the input shaft, and the internal teeth on the internal friction plate are engaged in the outer groove on the output shaft. Under the pushing or resetting of the pushing assembly, the multiple spaced-apart external and internal friction plates abut or disengage with each other, thereby completing the connection or disconnection of power transmission between the engine and the transmission. The clutch operation of the internal structure of the pneumatic clutch is smooth and stable, and the arrangement of multiple external and internal friction plates greatly improves the service life of the clutch. Attached Figure Description

[0013] Figure 1 A schematic diagram of the internal structure of the pneumatic clutch provided by this utility model.

[0014] Figure 2 for Figure 1 A disassembled schematic diagram of the input shaft, output shaft, and friction plate assembly of the internal structure of the pneumatic clutch. Detailed Implementation

[0015] The specific embodiments of this utility model are described in further detail below. It should be understood that the description of the embodiments of this utility model herein is not intended to limit the scope of protection of this utility model.

[0016] like Figure 1 The diagram shows the internal structure of the pneumatic clutch provided by this invention. The internal structure of the pneumatic clutch includes a housing 10, an input shaft 20 disposed on one side of the housing 10, an output shaft 30 disposed on one side of the input shaft 20, a friction plate assembly 40 disposed between the input shaft 20 and the output shaft 30, and a pushing assembly 50 disposed on one side of the friction plate assembly 40. It is conceivable that the internal structure of the pneumatic clutch also includes other functional modules, such as an air supply module, a screw module, etc., which are technologies known to those skilled in the art and will not be described in detail here.

[0017] The housing 10 has a cavity inside for placing the input shaft 20 and the output shaft 30. The end of the input shaft 20 away from the output shaft 30 passes through the housing 10 and is connected to an external engine. The end of the output shaft 30 away from the input shaft 20 is connected to an external gearbox.

[0018] The input shaft 20 is sleeved with several bearings 21, the circumferential outer wall of the bearing 21 abuts against the inner wall of the shell 10, so that the input shaft 20 has a supporting force to achieve the function of free rotation of the input shaft 20.

[0019] Please refer to Figure 2 The side of the input shaft 20 towards the output shaft 30 has a circular ring part 22, the circumferential inner wall of the circular ring part 22 is spaced apart and provided with several inner grooves 23, the length direction of the inner grooves 23 is parallel to the arrangement direction of the input shaft 20 and the output shaft 30. The inner grooves 23 are used for clamping part of the friction plate assembly 40 to cooperate with the function of the friction plate 40 to cut off or connect the power transmission between the engine and the gearbox. The specific cooperation will be described below.

[0020] The output shaft 30 is correspondingly provided with several outer grooves 31 on the circumferential outer wall of the circular ring part 22, the length direction of the outer grooves 31 is parallel to the length direction of the inner grooves 23. The outer grooves 31 are used for clamping part of the friction plate assembly 40 to cooperate with the function of the friction plate 40 to cut off or connect the power transmission between the engine and the gearbox. The specific cooperation will be described below.

[0021] The output shaft 30 is provided with a reset groove 32 on the side towards the push assembly 50, the length direction of the reset groove 32 is parallel to the length direction of the inner grooves 23, which is used for placing part of the push assembly 50 to achieve the function of resetting the push assembly 50, the specific installation will be described below.

[0022] The friction plate assembly 40 includes several spaced apart outer friction plates 41, and several inner friction plates 42 spaced apart on one side of the outer friction plates 41.

[0023] The outer friction plates 41 and the inner friction plates 42 are staggered and spaced apart, that is, between every two adjacent outer friction plates 41, an inner friction plate 42 is arranged. The circumferential outer wall of the outer friction plate 41 is spaced apart and provided with several outer teeth 43, several outer teeth 43 are correspondingly clamped in the inner grooves 23 on the input shaft 20, so that the outer friction plate 41 can only move along the length direction of the inner grooves 23, and can rotate together with the input shaft 20.

[0024] The circumferential outer wall of the inner friction plate 42 is spaced apart and provided with several inner teeth 44, several inner teeth 44 are correspondingly clamped in the outer grooves 31 on the output shaft 30, so that the inner friction plate 42 can only move along the length direction of the outer grooves 31, and the inner friction plate 42 and the output shaft 30 cannot rotate relative to each other.

[0025] Under the action of the push assembly 50, the outer and inner friction plates 41, 42 abut against each other, so that the rotation of the input shaft 20 drives the rotation of the outer and inner friction plates 41, 42 and the output shaft 30, thereby transmitting the power of the input shaft 20 to the output shaft 30 to connect the power transmission between the engine and the gearbox. When it is necessary to disconnect the power transmission between the engine and the gearbox, the air supply of the push assembly 50 is only needed to be disconnected, the clutch operation is smooth and smooth, and the arrangement of the plurality of outer and inner friction plates 41, 42 greatly improves the service life of the clutch. The specific action of the push assembly 50 will be described below.

[0026] The push assembly 50 comprises an air nozzle 51 arranged on the housing 10, a pneumatic piston 52 arranged on one side of the air nozzle 51, a pressure plate 53 arranged on one side of the pneumatic piston 52, and at least two springs 54 arranged on one side of the pressure plate 53.

[0027] The air nozzle 51 is connected with an external air supply module, and the air nozzle 51 has a closed air passage between the output end and the pneumatic piston 52, which is located on the side of the pneumatic piston 52 away from the pressure plate 53. The pressure plate 53 is arranged with a ejection portion 55 on the side away from the pneumatic piston 52, and the end of the ejection portion 55 away from the pressure plate 53 faces the friction plate assembly 40. Thus, when the air supply module supplies air, the pneumatic piston 52 pushes the pressure plate 53 to move, so that the ejection portion 55 abuts against the friction plate assembly 40 and pushes the outer and inner friction plates 41, 42 to abut against each other, thereby connecting the power transmission between the engine and the gearbox.

[0028] The spring 54 is arranged in the reset groove 32, one end of the spring 51 abuts against the end of the pneumatic piston 52 facing the pressure plate 53, and the other end abuts against the bottom surface in the reset groove 32. Thus, when the pneumatic piston 52 pushes the pressure plate 53 to move, the pneumatic piston 52 presses the spring 54 to store elastic potential energy. When it is necessary to disconnect the power transmission between the engine and the gearbox, the air supply of the air supply module is disconnected, so that the elastic potential energy of the spring 54 is released and pushes the pneumatic piston 52 and the pressure plate 53 away from the friction plate assembly 40. The pushing force of the outer and inner friction plates 41, 42 abutting against each other disappears, so as to disconnect the outer and inner friction plates 41, 42, thereby making the input shaft 20 idle and disconnecting the power transmission between the engine and the gearbox.

[0029] Compared with the prior art, the internal structure of the pneumatic clutch is characterized in that the outer teeth 43 on the outer friction plate 41 are clamped in the inner groove 23 on the input shaft 20, the inner teeth 44 on the inner friction plate 42 are clamped in the outer groove 31 on the output shaft 30, and under the pushing or resetting of the pushing assembly 50, the plurality of interval arranged outer and inner friction plates 41 and 42 abut or disconnect each other, thereby completing the connection or disconnection of the power transmission between the engine and the gearbox. The clutch operation of the internal structure of the pneumatic clutch is smooth, and the plurality of outer and inner friction plates 41 and 42 greatly improve the service life of the clutch.

[0030] The above is only the preferred embodiment of the utility model, and is not used for limiting the protection scope of the utility model, and any modification, equivalent replacement or improvement etc. within the utility model spirit are covered in the claim range of the utility model.

Claims

1. An internal structure of a pneumatic clutch, characterized by: The internal structure of the pneumatic clutch comprises a shell, an input shaft arranged on one side of the shell, an output shaft arranged on one side of the input shaft, a friction plate assembly arranged between the input shaft and the output shaft, and a pushing assembly arranged on one side of the friction plate assembly, the side of the input shaft facing the output shaft has a circular ring part, a plurality of inner grooves are arranged on the circumferential inner side wall of the circular ring part at intervals, the length direction of the inner grooves is parallel to the arrangement direction of the input shaft and the output shaft, a plurality of outer grooves are arranged on the circumferential outer side wall of the output shaft corresponding to the circular ring part at intervals, the length direction of the outer grooves is parallel to the length direction of the inner grooves, the friction plate assembly comprises a plurality of outer friction plates arranged at intervals, and a plurality of inner friction plates arranged on one side of the outer friction plates at intervals, the outer friction plates and the inner friction plates are staggered and arranged at intervals, that is, one inner friction plate is arranged between every two adjacent outer friction plates, a plurality of outer teeth are arranged on the circumferential outer side wall of the outer friction plate at intervals, and the plurality of outer teeth are correspondingly and clampingly arranged in the inner grooves on the input shaft, a plurality of inner teeth are arranged on the circumferential outer side wall of the inner friction plate at intervals, and the plurality of inner teeth are correspondingly and clampingly arranged in the outer grooves on the output shaft.

2. The internal structure of a pneumatic clutch according to claim 1, characterized in that: A cavity for placing the input shaft and the output shaft is formed in the shell, and the end of the input shaft away from the output shaft penetrates through the shell and is connected with an external engine.

3. The internal structure of a pneumatic clutch according to claim 1, characterized in that: The end of the output shaft away from the input shaft is connected with an external gearbox.

4. The internal structure of a pneumatic clutch according to claim 1, characterized in that: A plurality of bearings are arranged on the input shaft, and the circumferential outer side wall of the bearing abuts against the inner side wall of the shell.

5. The internal structure of a pneumatic clutch according to claim 1, characterized in that: A reset groove is formed on the side of the output shaft facing the pushing assembly, and the length direction of the reset groove is parallel to the length direction of the inner groove.

6. The internal structure of a pneumatic clutch according to claim 5, characterized in that: The pushing assembly comprises an air nozzle arranged on the shell, a pneumatic piston arranged on one side of the air nozzle, a pressure plate arranged on one side of the pneumatic piston, and at least two springs arranged on one side of the pressure plate, the springs are arranged in the reset groove, one end of the spring abuts against the end of the pneumatic piston facing the pressure plate, and the other end abuts against the bottom surface in the reset groove.

7. The internal structure of a pneumatic clutch according to claim 6, characterized in that: The air nozzle is connected with an external air supply module, a closed air channel is formed between the output end of the air nozzle and the pneumatic piston, and the air channel is located on the side of the pneumatic piston away from the pressure plate.

8. The internal structure of a pneumatic clutch according to claim 6, characterized in that: A ejection part is protrusively arranged on the side of the pressure plate away from the pneumatic piston, and the end of the ejection part away from the pressure plate faces the friction plate assembly.

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