Thin pneumatic clutch

Abstract

The thin type pneumatic clutch comprises a flywheel assembly and a driven assembly, the flywheel assembly comprises a driving base, a flywheel and a pressing disc, a rear axle tube is fixedly arranged on the driving base, the flywheel is fixedly connected with the rear axle tube, a rear ring wall is arranged on one side of the driving base, the flywheel is located in the rear ring wall, and the pressing disc is matched with the rear ring wall in a clamped mode. The driven assembly comprises a driven seat and a friction plate, a driven shaft is arranged on the driven seat and fixedly connected with the friction plate, an air chamber is arranged on the driven seat, a piston structure is arranged in the air chamber and slidably connected with the air chamber, one side of the piston structure is fixedly connected with the pressing disc, and a sensor is arranged in the air chamber. The clutch control system is reasonable in structure, the air pressure in the air chamber and the position of the piston are monitored through the sensor, the state of a clutch can be known in real time, and it is guaranteed that the clutch can be normally used.

Description

Technical Field

[0001] The invention relates to the field of clutches, in particular to a thin-type pneumatic clutch. Background Art

[0002] The clutch is a common component in mechanical transmission, which can separate or engage the transmission system at any time. The basic requirements for it are: smooth engagement, quick and thorough separation; easy adjustment and repair; small size; small mass; good wear resistance and sufficient heat dissipation capacity; easy and labor-saving operation. The commonly used types are tooth type and friction type.

[0003] The pneumatic clutch transmits power by pushing the friction component with air pressure, and releases it with a return spring. The air chamber in the pneumatic clutch needs to be sealed, but since the piston needs to move in the air chamber, after long-term use, the sealing between it and the air chamber will decrease due to wear. Clutch failures often occur during mechanical transmission, so it is particularly important to understand the situation in the air chamber in real time. In response to the above problems, a solution is proposed below. Summary of the invention

[0004] The object of the present invention is to provide a thin-type pneumatic clutch, which has the advantage of being able to understand the situation in the air chamber in real time.

[0005] The above technical objectives of the present invention are achieved through the following technical solutions: A thin-type pneumatic clutch comprises a flywheel assembly and a driven assembly, wherein the flywheel assembly comprises a driving seat, a flywheel and a pressure plate, wherein a rear axle tube is fixedly arranged on the driving seat, and the flywheel is fixedly connected to the rear axle tube, a rear annular wall is arranged on one side of the driving seat, the flywheel is located inside the rear annular wall, a plurality of clamping strips are arranged on the inner wall of the rear annular wall, a plurality of clamping grooves are arranged on the outer edge of the pressure plate, the pressure plate is located inside the rear annular wall and is engaged with the rear annular wall, the driven assembly comprises a driven seat and a friction plate, the friction plate is located inside the rear annular wall, and the friction plate is located between the flywheel and the pressure plate, and a rear annular wall is arranged on the driven seat There is a driven shaft, which is rotatably connected to the driven seat through a release bearing, the driven shaft passes through the center of the pressure plate, and is fixedly connected to the friction plate, an air chamber is arranged on the driven seat, the air chamber is connected to an external air intake device through an air pipe arranged on the driven seat, a piston structure is arranged in the air chamber, the piston structure is slidably connected to the air chamber, one side of the piston structure is fixedly connected to the pressure plate, the piston structure is used to push the pressure plate to move so that the pressure plate pushes the friction plate close to the flywheel, a sensor is arranged in the air chamber, and the sensor is used to detect the position of the piston and the air pressure in the air chamber.

[0006] Preferably, the piston structure includes a movable ring block and a rotating ring block, one end of the rotating ring block is fixed to the front side of the pressure plate, the movable ring block is located in the air chamber and is slidably connected to the air chamber, a rotating groove is provided on the rear side of the movable ring block, the rotating ring block is located in the rotating groove and is rotatably connected to the rotating groove.

[0007] Preferably, a sealing ring is embedded on the outer wall of the moving ring block, and the sealing ring is used to enhance the sealing between the moving ring block and the air chamber.

[0008] Preferably, a plurality of spring grooves are provided on the inner wall of the rear annular wall, and a spring is provided in the spring groove. The spring is located on the side of the pressure plate away from the driven seat, and one end of the spring is fixedly connected to the pressure plate. The spring is used to push the pressure plate away from the driving seat.

[0009] Preferably, the friction plate comprises a base plate and a plurality of friction plates, the rear side surface of the base plate is provided with a plurality of embedding grooves, the shape of the embedding grooves is the same as that of the friction plates, and the plurality of friction plates are respectively embedded in the plurality of embedding grooves and fixedly connected to the embedding grooves.

[0010] Preferably, a plurality of the embedding grooves are arranged around the outer edge of the substrate, the embedding grooves are designed to be arc-shaped, the friction plate is an arc corresponding to a central angle of 60°, the diameter of the arc corresponding to the friction plate is smaller than the diameter of the substrate, and connecting plates consistent with their curvature are provided at the inner and outer edges of the friction plate, the thickness of the connecting plate is smaller than the thickness of the friction plate, and the thickness of the connecting plate is smaller than the depth of the embedding groove, a connecting hole is opened on the connecting plate, and the connecting plate is fixedly connected to the embedding groove by fasteners.

[0011] Preferably, a torsional vibration damper is provided at the inner edge of the substrate, and the height of the torsional vibration damper exposed at the rear side of the substrate is less than the thickness of the friction plate.

[0012] The beneficial effects of the present invention are as follows: the present application divides the piston structure into two parts, a movable ring block and a rotating ring block, wherein the movable ring block is used to ensure the sealing of the air chamber, and there is only axial movement between it and the air chamber, and it will not rotate in the air chamber; the rotating ring block can rotate with the pressure plate, and there will be no wear between the pressure plate; the rotating ring block and the movable ring block will rotate, but objects that reduce the friction coefficient, such as balls, or sleeve bearings, can be set in the rotating groove to reduce the friction between them, thereby reducing wear, and will not affect the functions that the two parts of the structure need to achieve.

[0013] The sensors are air pressure sensors and displacement sensors, which can monitor the air pressure in the air chamber and the distance between the piston end face and the displacement sensor at the appropriate air pressure value, thereby calculating the sealing condition between the piston and the air chamber to prevent accidents caused by clutch damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural cross-sectional view of the embodiment when separated; Figure 2 It is a cross-sectional view of the structure of the embodiment when pressed; Figure 3 It is a structural schematic diagram of the friction plate of the embodiment; Figure 4 It is a structural cross-sectional view of an embodiment used to demonstrate the cooperation between the rear annular wall and the pressure plate.

[0015] Figure numerals: 1. driving seat; 2. flywheel; 3. pressure plate; 4. rear axle tube; 5. rear ring wall; 6. clamping strip; 7. driven seat; 8. friction plate; 9. driven shaft; 10. air chamber; 11. sensor; 12. moving ring block; 13. rotating ring block; 14. sealing ring; 15. spring; 16. base plate; 17. friction plate; 18. connecting plate; 19. torsional damper. DETAILED DESCRIPTION

[0016] The following is only a preferred embodiment of the present invention, and the protection scope is not limited to this embodiment. All technical solutions under the concept of the present invention should belong to the protection scope of the present invention. The same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "bottom" and "top", "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0017] like Figures 1 to 4 As shown, a thin-type pneumatic clutch includes a flywheel 2 assembly and a driven assembly. The flywheel 2 assembly includes a drive seat 1, a flywheel 2 and a pressure plate 3. A rear annular wall 5 is provided on one side of the drive seat 1, and the flywheel 2 and the pressure plate 3 are both located inside the rear annular wall 5. Here, the drive seat 1 is used to protect the rear side of the flywheel 2. The drive seat 1 can also be directly removed, and the rear annular wall 5 originally provided on the drive seat 1 is provided on the flywheel 2. A rear axle tube 4 is fixedly provided on the drive seat 1, and the flywheel 2 is fixedly connected to the rear axle tube 4. The rear axle tube 4 is connected to an external power source, and the external power source drives the drive seat 1 and the flywheel 2 to rotate through the rear axle tube 4.

[0018] The rear annular wall 5 is cylindrical, and a plurality of clamping strips 6 are arranged on the inner wall of the rear annular wall 5. A plurality of clamping grooves are arranged on the outer edge of the pressure plate 3. The diameter of the pressure plate 3 is the same as the inner diameter of the rear annular wall 5. When the clamping grooves correspond to the clamping strips 6, the pressure plate 3 can be put into the rear annular wall 5. The rear annular wall 5 will rotate with the driving seat 1, thereby driving the pressure plate 3 to rotate.

[0019] A plurality of spring grooves are provided on the inner wall of the rear ring wall 5. The spring groove is a depression between two adjacent clip strips 6. A plate is provided at one position of the depression. The space between the plate and the two clip strips 6 is the spring groove. A spring 15 is provided in the spring groove. With the direction where the drive seat 1 is located as the rear and the direction where the pressure plate 3 is located as the front, the spring 15 is located at the rear side of the pressure plate 3 and is fixedly connected to the pressure plate 3. In the initial state, the spring 15 fixes the pressure plate 3 at a position close to the front end of the rear ring wall 5.

[0020] The driven assembly includes a driven seat 7 and a friction plate 8 . The friction plate 8 is located inside the rear annular wall 5 , and the friction plate 8 is located between the flywheel 2 and the pressure plate 3 .

[0021] The friction plate 8 includes a base plate 16 and a plurality of friction plates 17. The base plate 16 is annular. The middle part of the base plate 16 is a torsional vibration damper. The torsional vibration damper 19 is a device in the prior art and has a vibration reduction effect. The rear side of the base plate 16 is provided with a plurality of embedded grooves. The plurality of friction plates 17 are respectively embedded in the plurality of embedded grooves and fixedly connected to the embedded grooves. The height of the torsional vibration damper 19 exposed on the rear side of the base plate 16 is less than the thickness of the friction plate 17, that is, the torsional vibration damper 19 will not generate friction with the flywheel 2.

[0022] The shape of the embedded groove is the same as that of the friction plate 17, and can be designed to be an arc shape, a square shape, a waist shape, etc. In this design, an arc-shaped friction plate 17 is used, and an arc corresponding to a central angle of 60° is used. A plurality of embedded grooves are arranged around the outer edge of the base plate 16, so that the friction plate 17 is also installed on the outer edge of the base plate 16, and will not affect each other with the torsional damper 19.

[0023] The diameter of the circle corresponding to the friction plate 17 used in this design is smaller than the basic diameter, so even if an arc plate corresponding to a 60° central angle is used, more than six friction plates 17 can be arranged on the substrate 16. Several friction plates 17 are evenly distributed on the substrate 16, so that the friction coefficients of the substrate 16 in all directions are basically the same.

[0024] In this design, the inner and outer edges of the friction plate 17 are both provided with connecting plates 18 having the same curvature as the friction plate 17. The thickness of the connecting plate 18 is less than that of the friction plate 17, and the thickness of the connecting plate 18 is less than the depth of the embedded groove. The connecting plate 18 will not be exposed outside the embedded groove, so that there will be no friction with the flywheel 2, and thus no wear, and the friction plate 17 can be fixed. A plurality of connecting holes are provided on the connecting plate 18, and the connecting plate 18 is fixedly connected to the embedded groove by fasteners such as rivets.

[0025] A driven shaft 9 is arranged on the driven seat 7, and the driven shaft 9 is rotatably connected to the driven seat 7 through a release bearing, and the rear end of the driven shaft 9 passes through the pressure plate 3 and is fixedly connected to the center of the friction plate 8, that is, the center of the torsion damper 19. When the friction plate 8 rotates, it drives the driven shaft 9 to rotate, and the front end of the driven shaft 9 is connected to the external machinery to drive it to rotate.

[0026] The driven seat 7 is provided with an air chamber 10, which is connected to an external air intake device through an air pipe provided on the driven seat 7. The driven seat 7 does not rotate and is fixedly connected to the external device. The air pipe is embedded in the driven seat 7, one end of which is connected to an external air intake or air outlet device, such as an air pump, and the other end is communicated with the air chamber 10. The air pipe can both intake and extract the gas in the air chamber 10.

[0027] A piston structure is provided in the air chamber 10, and the piston structure includes a moving ring block 12 and a rotating ring block 13. The moving ring block 12 is located in the air chamber 10 and is slidably connected to the air chamber 10. When the air pressure in the air chamber 10 increases, the moving ring block 12 will move to the rear side of the air chamber 10, and when the air pressure in the air chamber 10 decreases, the moving ring block 12 will move to the front side of the air chamber 10. A sealing ring 14 is provided on the outer wall of the moving ring block 12, and the sealing ring 14 is used to enhance the sealing between the moving ring block 12 and the air chamber 10, and also to prevent the moving ring block 12 from moving randomly in the air chamber 10.

[0028] A rotation groove is provided at the rear side of the moving ring block 12, and the front side of the rotating ring block 13 is located in the rotation groove and is rotationally connected to the rotation groove. In order to reduce the friction between the rotating ring block 13 and the ring groove, a bearing or a ball bearing or other structure can be embedded in the rotation groove, and the structure is arranged at the rear end face of the moving ring block 12, which will not affect the sealing between the moving ring block 12 and the air chamber 10.

[0029] The rear end of the rotating ring block 13 is fixedly connected to the front side of the pressure plate 3. When the air chamber 10 is ventilated and the rotating ring block 13 is pushed backward by the moving ring block 12, the rotating ring block 13 will push the pressure plate 3 to move backward, so that the pressure plate 3 is pressed on the front side of the friction plate 8, and the friction plate 8 is pushed backward until the friction plate 8 is in close contact with the front side of the flywheel 2. At this time, the flywheel 2, the friction plate 8 and the pressure plate 3 rotate synchronously. The friction plate 8 will also drive the driven shaft 9 to rotate.

[0030] When the gas introduced into the air chamber 10 is extracted, the pressure plate 3 will return to the initial position under the action of the spring 15 and will no longer exert pressure on the friction plate 8. At this time, the friction plate 8 will also be separated from the flywheel 2, and the driven shaft 9 will no longer generate power for the external machinery.

[0031] A sensor 11 is arranged in the air chamber 10. The sensor 11 here is an air pressure sensor 11 and a displacement sensor 11. The other sensor 11 is used to detect the air pressure in the air chamber 10, and the displacement sensor 11 is used to detect the position of the piston. The data obtained by the sensor 11 will be processed by an external controller and displayed on a display, so as to facilitate understanding of the sealing of the air chamber 10 inside the clutch, so that hidden dangers can be eliminated in time.

[0032] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A thin-type pneumatic clutch, comprising a flywheel (2) assembly and a driven assembly, characterized in that: The flywheel (2) assembly comprises a driving seat (1), a flywheel (2) and a pressure plate (3); a rear axle tube (4) is fixedly provided on the driving seat (1); the flywheel (2) is fixedly connected to the rear axle tube (4); a rear annular wall (5) is provided on one side of the driving seat (1); the flywheel (2) is located inside the rear annular wall (5); a plurality of clamping strips (6) are provided on the inner wall of the rear annular wall (5); a plurality of clamping grooves are provided on the outer edge of the pressure plate (3); the pressure plate (3) is located inside the rear annular wall (5) and is engaged with the rear annular wall (5); the driven assembly comprises a driven seat (7) and a friction plate (8); the friction plate (8) is located inside the rear annular wall (5) and between the flywheel (2) and the pressure plate (3); a driven shaft (9) is provided on the driven seat (7) The driven shaft (9) is rotatably connected to the driven seat (7) through a release bearing. The driven shaft (9) passes through the center of the pressure plate (3) and is fixedly connected to the friction plate (8). An air chamber (10) is provided on the driven seat (7). The air chamber (10) is connected to an external air intake device through an air pipe provided on the driven seat (7). A piston structure is provided in the air chamber (10). The piston structure is slidably connected to the air chamber (10). One side of the piston structure is fixedly connected to the pressure plate (3). The piston structure is used to push the pressure plate (3) to move so that the pressure plate (3) pushes the friction plate (8) close to the flywheel (2). A sensor (11) is provided in the air chamber (10). The sensor (11) is used to detect the position of the piston and the air pressure in the air chamber (10).

2. A thin-type pneumatic clutch according to claim 1, characterized in that: The piston structure comprises a movable ring block (12) and a rotating ring block (13), one end of the rotating ring block (13) is fixed to the front side of the pressure plate (3), the movable ring block (12) is located in the air chamber (10) and is slidably connected to the air chamber (10), a rotating groove is provided on the rear side of the movable ring block (12), the rotating ring block (13) is located in the rotating groove and is rotatably connected to the rotating groove.

3. A thin-type pneumatic clutch according to claim 2, characterized in that: A sealing ring (14) is embedded on the outer wall of the movable ring block (12), and the sealing ring (14) is used to enhance the sealing performance between the movable ring block (12) and the air chamber (10).

4. A thin-type pneumatic clutch according to claim 1, characterized in that: A plurality of spring grooves are provided on the inner wall of the rear annular wall (5), and a spring (15) is provided in the spring groove. The spring (15) is located on a side of the pressure plate (3) away from the driven seat (7), and one end of the spring (15) is fixedly connected to the pressure plate (3). The spring (15) is used to push the pressure plate (3) away from the driving seat (1).

5. A thin-type pneumatic clutch according to claim 1, characterized in that: The friction plate (8) comprises a base plate (16) and a plurality of friction plates (17). The rear side surface of the base plate (16) is provided with a plurality of embedding grooves, the shape of the embedding grooves is the same as the shape of the friction plates (17), and the plurality of friction plates (17) are respectively embedded in the plurality of embedding grooves and fixedly connected to the embedding grooves.

6. A thin-type pneumatic clutch according to claim 5, characterized in that: A plurality of embedding grooves are arranged around the outer edge of the base plate (16), the embedding grooves are designed to be arc-shaped, the friction plate (17) is an arc corresponding to a central angle of 60°, the diameter of the arc corresponding to the friction plate (17) is smaller than the diameter of the base plate (16), the inner edge and the outer edge of the friction plate (17) are both provided with connecting plates (18) with the same arc, the thickness of the connecting plate (18) is smaller than the thickness of the friction plate (17), and the thickness of the connecting plate (18) is smaller than the depth of the embedding groove, the connecting plate (18) is provided with a connecting hole, and the connecting plate (18) is fixedly connected to the embedding groove by a fastener.

7. A thin-type pneumatic clutch according to claim 6, characterized in that: A torsional vibration damper is arranged at the inner edge of the base plate (16), and the height of the torsional vibration damper (19) exposed at the rear side of the base plate (16) is less than the thickness of the friction plate (17).

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