Clutch for machine tool

Abstract

The clutch for the machine tool comprises a gear shaft, a shaft seat, a flywheel, an air cylinder body, a piston, a clutch cavity, a brake cavity, a plurality of springs, an oil injection port and an end cover, the flywheel is rotationally arranged on the shaft seat, the brake cavity and the clutch cavity communicated with the brake cavity are formed in the flywheel, and the rear end of the clutch cavity penetrates through the rear end of the flywheel; the rear end of the flywheel is provided with an end cover for sealing the rear end of the clutch cavity, the end cover is provided with an oil injection port communicated with the clutch cavity, a gear shaft located in the flywheel is rotationally arranged in the shaft seat, and a clutch mechanism located in the clutch cavity is arranged between the gear shaft and the flywheel. A brake mechanism located in the brake cavity is arranged between the gear shaft and the shaft seat, an air cylinder body located between the clutch mechanisms is arranged on the gear shaft in a sliding and sealing mode, a piston connected with the brake mechanism is arranged in the air cylinder body, and a spring is arranged between the air cylinder body and the clutch mechanisms. Compared with the prior art, the air cylinder has the advantages that the heat dissipation effect can be improved, and the service life can be prolonged.

Description

Technical Field

[0001] This invention relates to the technical field of presses, and in particular to the technical field of a clutch for machine tools. Background Technology

[0002] The clutch of a forging press is an important functional component for power input of forging equipment. At present, the clutch mechanisms mainly used in forging presses can be divided into two types: rigid connection clutch mechanism and friction clutch mechanism.

[0003] An axial pneumatic clutch device, application number CN200710019282.X, which uses pneumatic components to control a pneumatic diaphragm to push a friction plate for engagement and disengagement, includes a pulley, an external gear shaft, an internal gear ring, a forward / reverse disc, a friction plate, an intermediate forward / reverse disc, an air diaphragm, an air diaphragm pressure cap, an inner air diaphragm pressure cap, an air diaphragm seat, a spring, and a guide post. The external gear shaft is installed in the middle of the pulley, with external teeth on the outer periphery of its front part and a shaft hole in its rear part. A friction plate is located in the middle of the external gear shaft. The internal gear ring is installed inside the pulley, and a friction plate is installed inside the internal gear ring. An intermediate forward / reverse disc is installed between the two friction plates. The guide post is fixed on the friction plate in the middle of the external gear shaft. The guide post is equipped with a spring, the advance and retractor disc is fitted on the front of the external gear shaft, the inner pressure cover of the air film is fitted on the front end of the external gear shaft, the air film is fitted on the air film seat, and a sealed air chamber is formed between the air film and the air film seat. The air film seat is fixed to the front end of the external gear shaft. The engagement and disengagement of the axial pneumatic clutch: when compressed air enters the sealed air chamber of the air film seat through the air pipe, solenoid valve and air guide valve, and compressed air connector, the rubber air film will expand axially, pushing the advance and retractor disc to press the friction plate, so that the friction plate is pressed with the intermediate advance and retractor disc and pressed onto the friction plate of the external gear shaft, so that the pulley drives the reducer or other mechanism to rotate instantly. This device has poor heat dissipation and short service life. Summary of the Invention

[0004] The purpose of this invention is to solve the problems in the prior art and to propose a clutch for machine tools that can improve heat dissipation and extend service life.

[0005] To achieve the above objectives, the present invention proposes a clutch for machine tools, comprising a gear shaft, a bearing, a flywheel, a cylinder body, a piston, a clutch chamber, a brake chamber, several springs, an oil inlet, and an end cover. The flywheel is rotatably mounted on the bearing. The flywheel contains a brake chamber and a clutch chamber communicating with the brake chamber. The rear end of the clutch chamber extends through the rear end of the flywheel. An end cover sealing the rear end of the clutch chamber is provided at the rear end of the flywheel. An oil inlet communicating with the clutch chamber is provided on the end cover. A gear shaft is rotatably mounted within the flywheel on the bearing. A clutch mechanism is located within the clutch chamber between the gear shaft and the flywheel. A brake mechanism is located within the brake chamber between the gear shaft and the bearing. A cylinder body is slidably sealed on the gear shaft, located between the clutch mechanisms. A piston connected to the brake mechanism is located within the cylinder body. Springs are provided between the cylinder body and the clutch mechanism. An air intake passage communicating with the interior of the cylinder body is provided at the rear end of the gear shaft.

[0006] Preferably, the clutch mechanism includes an external clutch gear, an internal clutch gear, a plurality of clutch friction plates I and a plurality of clutch friction plates II. The external clutch gear and the internal clutch gear are respectively fixed on the gear shaft and the flywheel. The internal clutch gear is provided with clutch friction plates I that mesh with it and slide along its axial direction. The external clutch gear is provided with clutch friction plates II that mesh with it and slide along its axial direction. The clutch friction plates II and clutch friction plates I are arranged alternately from front to back and their friction portions overlap.

[0007] Preferably, the end cap is provided with an annular protrusion I for contacting the clutch friction plate I at the rear when the clutch mechanism is engaged.

[0008] Preferably, the end cover is connected to the gear shaft via a ball bearing I, and the rear end of the gear shaft is provided with a fixing cover for fixing the ball bearing I, and a skeleton oil seal I is provided between the fixing cover and the end cover.

[0009] Preferably, a rotary joint is provided at the rear end of the gear shaft via a ball bearing II, and a rotary shaft seal is provided between the rotary joint and the gear shaft. The front end of the rotary joint is connected to the air intake channel, and the rear end of the rotary joint is connected to the air supply pipe.

[0010] Preferably, a spring is provided between the front end of the clutch internal gear and the cylinder body in a circumferentially spaced manner, and an annular protrusion II is provided at the rear end of the cylinder body for abutting against the foremost clutch friction plate II when the clutch mechanism is engaged.

[0011] Preferably, the braking mechanism includes an internal braking gear, an external braking gear, braking friction pad I, braking friction pad II, and a fixed seat. The internal braking gear is fixedly mounted on a shaft seat via the fixed seat. The external braking gear is fixedly mounted on a gear shaft and fixedly connected to a piston. The piston and the gear shaft are sealed by a sealing ring. The external braking gear is provided with braking friction pad I that meshes with it and slides along its axial direction. The internal braking gear is provided with braking friction pad II that meshes with it and slides along its axial direction. The braking friction pad II and braking friction pad I are alternately arranged from front to back, and their mutual friction portions overlap.

[0012] Preferably, the front end of the cylinder body is provided with an annular pressing part I for abutting against the rearmost brake friction pad I when the braking mechanism is engaged, and the fixed seat is provided with an annular pressing part II for abutting against the frontmost brake friction pad II when the braking mechanism is engaged.

[0013] Preferably, the gear shaft is rotatably mounted in the bearing housing via a double-row spherical roller bearing, and the gear shaft and the bearing housing are sealed by a skeleton oil seal II.

[0014] Preferably, the flywheel is rotatably mounted on the bearing seat via a rolling bearing, and the flywheel and the bearing seat are sealed by a skeleton oil seal III.

[0015] The beneficial effects of this invention are as follows: This invention provides a brake chamber and a clutch chamber communicating with the brake chamber within the flywheel. The rear end of the clutch chamber extends through the rear end of the flywheel. The rear end of the flywheel is provided with an end cap that seals the rear end of the clutch chamber. The end cap has an oil injection port communicating with the clutch chamber. A gear shaft is rotatably mounted within the flywheel in the bearing seat. A clutch mechanism is located within the clutch chamber between the gear shaft and the flywheel. A braking mechanism is located within the brake chamber between the gear shaft and the bearing seat. By injecting clutch oil into the clutch chamber and the brake chamber, the clutch mechanism and the braking mechanism are cooled and their working wear is reduced. Compared with the prior art, this invention can improve heat dissipation and extend service life.

[0016] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a cross-sectional view of a clutch for a machine tool according to the present invention.

[0018] In the diagram: 1-Gear shaft, 2-Shaft seat, 3-Flywheel, 4-Cylinder body, 5-Piston, 6-Clutch chamber, 7-Brake chamber, 8-Spring, 9-Oil inlet, 10-End cover, 11-Intake passage, 12-Clutch external gear, 13-Clutch internal gear, 14-Clutch friction plate I, 15-Clutch friction plate II, 16-Annular protrusion I, 17-Ball bearing I, 18-Fixed cover, 19-Skeleton oil seal I, 20-Ball bearing II, 21-Rotary joint, 22-Rotary shaft seal, 23-Annular protrusion II, 24-Brake internal gear, 25-Brake external gear, 26-Brake friction plate I, 27-Brake friction plate II, 28-Fixed seat, 29-Annular tightening part I, 30-Annular tightening part II, 31-Double row spherical roller bearing, 32-Skeleton oil seal II, 33-Rolling bearing, 34-Skeleton oil seal III. Detailed Implementation

[0019] See Figure 1 This invention discloses a machine tool clutch, comprising a gear shaft 1, a bearing 2, a flywheel 3, a cylinder body 4, a piston 5, a clutch chamber 6, a braking chamber 7, several springs 8, an oil inlet 9, and an end cover 10. The flywheel 3 is rotatably mounted on the bearing 2. The flywheel 3 contains the braking chamber 7 and a clutch chamber 6 communicating with the braking chamber 7. The rear end of the clutch chamber 6 extends through the rear end of the flywheel 3. An end cover 10, which seals the rear end of the clutch chamber 6, is provided on the rear end of the flywheel 3. An oil inlet 9, communicating with the clutch chamber 6, is threaded onto the oil inlet 9. The sealed plug has a gear shaft 1 rotatably mounted inside the flywheel 3 within the bearing seat 2. A clutch mechanism is located in the clutch chamber 6 between the gear shaft 1 and the flywheel 3. A brake mechanism is located in the brake chamber 7 between the gear shaft 1 and the bearing seat 2. A cylinder body 4 is slidably sealed on the gear shaft 1 between the clutch mechanisms. A piston 5 connected to the brake mechanism is located inside the cylinder body 4. A spring 8 is located between the cylinder body 4 and the clutch mechanism. An air intake channel 11 communicating with the interior of the cylinder body 4 is located at the rear end of the gear shaft 1.

[0020] The clutch mechanism includes an external clutch gear 12, an internal clutch gear 13, a plurality of clutch friction plates I14 and a plurality of clutch friction plates II15. The external clutch gear 12 and the internal clutch gear 13 are respectively fixed on the gear shaft 1 and the flywheel 3. The internal clutch gear 13 is provided with clutch friction plates I14 that mesh with it and slide along its axial direction. The external clutch gear 12 is provided with clutch friction plates II15 that mesh with it and slide along its axial direction. The clutch friction plates II15 and clutch friction plates I14 are arranged alternately from front to back and their friction parts overlap.

[0021] The end cap 10 has an annular protrusion I16 inside, which abuts against the clutch friction plate I14 at the rear when the clutch mechanism is engaged.

[0022] The end cover 10 is connected to the gear shaft 1 by a ball bearing I17. The rear end of the gear shaft 1 is provided with a fixing cover 18 to fix the ball bearing I17. A skeleton oil seal I19 is provided between the fixing cover 18 and the end cover 10.

[0023] A rotating joint 21 is provided in the rear end of the gear shaft 1 through a ball bearing II20. A rotating shaft seal 22 is provided between the rotating joint 21 and the gear shaft 1. The front end of the rotating joint 21 is connected to the air intake channel 11, and the rear end of the rotating joint 21 is connected to the air supply pipe.

[0024] The front end of the clutch internal gear 13 is provided with a spring 8 arranged in a circumferentially spaced manner between it and the cylinder body 4. The rear end of the cylinder body 4 is provided with an annular protrusion II23 for abutting against the foremost clutch friction plate II15 when the clutch mechanism is engaged.

[0025] The braking mechanism includes an internal brake gear 24, an external brake gear 25, brake friction pads I26 and II27, and a fixed seat 28. The internal brake gear 24 is fixedly mounted on the shaft seat 2 via the fixed seat 28. The external brake gear 25 is fixedly mounted on the gear shaft 1 and fixedly connected to the piston 5. The piston 5 and the gear shaft 1 are sealed by a sealing ring. The external brake gear 25 is provided with brake friction pads I26 that mesh with it and slide along its axial direction. The internal brake gear 24 is provided with brake friction pads II27 that mesh with it and slide along its axial direction. The brake friction pads II27 and I26 are alternately arranged from front to back and their mutual friction portions overlap.

[0026] The cylinder body 4 has an annular pressing part I29 at the front end for contacting the rearmost brake friction pad I26 when the braking mechanism is engaged, and the fixed seat 28 has an annular pressing part II30 for contacting the frontmost brake friction pad II27 when the braking mechanism is engaged.

[0027] The gear shaft 1 is rotatably mounted in the bearing seat 2 via a double-row spherical roller bearing 31, and the gear shaft 1 and the bearing seat 2 are sealed by a skeleton oil seal II 32.

[0028] The flywheel 3 is rotatably mounted on the bearing seat 2 via a rolling bearing 33, and the flywheel 3 and the bearing seat 2 are sealed by a skeleton oil seal III 34.

[0029] Working process of this invention: In the operation of the machine tool clutch of the present invention, when power needs to be transmitted, compressed air passes through the rotary joint 21 and the air intake channel 11 in sequence, and finally enters the cylinder body 4. Since the piston 5 is fixed, the cylinder body 4 moves backward under the action of air pressure. The cylinder body 4 compresses the spring 8 and pushes the clutch friction plate backward through the annular protrusion II23 and abuts together to realize the clutch mechanism engagement. At this time, the flywheel 3 drives the gear shaft 1 to rotate through the clutch mechanism.

[0030] When braking is required, the compressed air in the cylinder 4 is discharged sequentially through the intake passage 11 and the rotary joint 21. Since there is no compressed air in the cylinder 4, the cylinder 4 moves forward under the action of the spring 8. The cylinder 4 pushes the brake friction pads forward through the annular pressing part I29 and they abut together to realize the braking mechanism engagement, thereby realizing the braking of the gear shaft 1. Since the clutch friction pads of the clutch mechanism cannot abut together without the action of the cylinder 4, the clutch mechanism is disengaged, and the flywheel 3 does not drive the gear shaft 1 to rotate.

[0031] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the scope of protection of the present invention.

Claims

1. A clutch for a machine tool, characterized in that: Includes a gear shaft (1), a bearing seat (2), a flywheel (3), a cylinder body (4), a piston (5), a clutch chamber (6), a brake chamber (7), several springs (8), an oil inlet (9), and an end cap (10). The flywheel (3) is rotatably mounted on the bearing seat (2). The flywheel (3) has a brake chamber (7) and a clutch chamber (6) communicating with the brake chamber (7). The rear end of the clutch chamber (6) passes through the rear end of the flywheel (3). The rear end of the flywheel (3) is provided with an end cap (10) that closes the rear end of the clutch chamber (6). The end cap (10) has an oil inlet (9) communicating with the clutch chamber (6). The bearing seat (2) 2) The gear shaft (1) is located inside the flywheel (3) and rotates. A clutch mechanism is located in the clutch chamber (6) between the gear shaft (1) and the flywheel (3). A brake mechanism is located in the brake chamber (7) between the gear shaft (1) and the bearing seat (2). A cylinder body (4) is slidably sealed on the gear shaft (1) and located between the clutch mechanism and the clutch mechanism. A piston (5) connected to the brake mechanism is provided inside the cylinder body (4). A spring (8) is provided between the cylinder body (4) and the clutch mechanism. An air intake channel (11) communicating with the inside of the cylinder body (4) is provided at the rear end of the gear shaft (1).

2. A machine tool clutch as described in claim 1, characterized in that: The clutch mechanism includes an external clutch gear (12), an internal clutch gear (13), a plurality of clutch friction plates I (14) and a plurality of clutch friction plates II (15). The external clutch gear (12) and the internal clutch gear (13) are respectively fixed on the gear shaft (1) and the flywheel (3). The internal clutch gear (13) is provided with clutch friction plates I (14) that mesh with it and slide along its axial direction. The external clutch gear (12) is provided with clutch friction plates II (15) that mesh with it and slide along its axial direction. The clutch friction plates II (15) and clutch friction plates I (14) are alternately arranged from front to back and their friction parts overlap.

3. A machine tool clutch as described in claim 2, characterized in that: The end cap (10) has an annular protrusion I (16) inside, which is used to abut against the clutch friction plate I (14) at the rear when the clutch mechanism is engaged.

4. A machine tool clutch as described in claim 3, characterized in that: The end cover (10) is connected to the gear shaft (1) by a ball bearing I (17). The rear end of the gear shaft (1) is provided with a fixing cover (18) for fixing the ball bearing I (17). A skeleton oil seal I (19) is provided between the fixing cover (18) and the end cover (10).

5. A machine tool clutch as described in claim 4, characterized in that: A rotating joint (21) is provided in the rear end of the gear shaft (1) through a ball bearing II (20). A rotating shaft seal (22) is provided between the rotating joint (21) and the gear shaft (1). The front end of the rotating joint (21) is connected to the air intake channel (11), and the rear end of the rotating joint (21) is connected to the air supply pipe.

6. A machine tool clutch as described in claim 2, characterized in that: The front end of the clutch internal gear (13) is provided with a spring (8) arranged in a circumferential pattern between the front end and the cylinder body (4), and the rear end of the cylinder body (4) is provided with an annular protrusion II (23) for contacting the frontmost clutch friction plate II (15) when the clutch mechanism is engaged.

7. A machine tool clutch as described in claim 1, characterized in that: The braking mechanism includes an internal braking gear (24), an external braking gear (25), a braking friction pad I (26), a braking friction pad II (27), and a fixed seat (28). The internal braking gear (24) is fixedly mounted on the shaft seat (2) via the fixed seat (28). The external braking gear (25) is fixedly mounted on the gear shaft (1) and fixedly connected to the piston (5). The piston (5) and the gear shaft (1) are sealed by a sealing ring. The external braking gear (25) is provided with a braking friction pad I (26) that meshes with it and slides along its axial direction. The internal braking gear (24) is provided with a braking friction pad II (27) that meshes with it and slides along its axial direction. The braking friction pad II (27) and the braking friction pad I (26) are alternately arranged from front to back and their friction parts overlap.

8. A machine tool clutch as described in claim 7, characterized in that: The cylinder body (4) has an annular tightening part I (29) at the front end for contacting the rearmost brake friction pad I (26) when the braking mechanism is engaged, and the fixed seat (28) has an annular tightening part II (30) for contacting the frontmost brake friction pad II (27) when the braking mechanism is engaged.

9. A machine tool clutch as described in claim 1, characterized in that: The gear shaft (1) is rotatably mounted in the bearing seat (2) by a double-row spherical roller bearing (31), and the gear shaft (1) and the bearing seat (2) are sealed by a skeleton oil seal II (32).

10. A machine tool clutch as claimed in any one of claims 1 to 9, characterized in that: The flywheel (3) is rotatably mounted on the bearing seat (2) via a rolling bearing (33), and the flywheel (3) and the bearing seat (2) are sealed by a skeleton oil seal III (34).

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