Brake with forced ventilation and heat dissipation functions

Abstract

The invention relates to the field of brakes, and discloses a forced ventilation and heat dissipation brake which comprises a brake caliper body arranged on the outer side of a brake disc, a first containing groove formed in the side wall of an inner cavity of the brake caliper body and a friction plate movably arranged on the inner side of the first containing groove. The brake caliper body is provided with a forced heat dissipation assembly, the forced heat dissipation assembly comprises a second containing groove formed in the inner side of the end of the brake caliper body, the second containing groove is movably provided with a support, and the support is rotationally provided with a first rotating shaft. According to the brake with the forced ventilation and heat dissipation functions, displacement of a friction wheel and a friction plate in the forced heat dissipation assembly is synchronous, rotation of the friction wheel is achieved by using rotation of a brake disc as power, and then forced heat dissipation of the brake disc through rotation of heat dissipation fan blades is achieved; and due to the arrangement of the one-way rotating assembly, the heat dissipation fan blades can continue to rotate for a period of time when the friction wheel stops, the heat dissipation effect is improved, and the overall service life is prolonged.

Description

Technical Field

[0001] The invention relates to the field of brakes, and in particular to a brake with forced ventilation and heat dissipation. Background Art

[0002] As a widely used braking system, the core function of non-motor vehicle mechanical disc brakes is to slow down or stop the wheels through friction. The system usually consists of a brake handle, a steel cable / cable, a brake caliper, a friction pad and a brake disc. When the user operates the brake handle, the steel cable pulls the moving parts in the brake caliper, pushing the friction pads on both sides to clamp the rotating brake disc, and converting kinetic energy into heat energy through the friction between the contact surfaces, thereby generating braking force.

[0003] Non-motor vehicles often need to brake frequently or stop urgently under complex road conditions, which causes continuous accumulation of high temperature at the friction interface. Since such brakes generally rely on natural convection of air to dissipate heat, the heat dissipation efficiency is limited. Long-term exposure of the brake disc to thermal stress cycles can easily cause thermal degradation of the material, surface deformation and even micro cracks, which not only reduces the stability of the braking response, but also accelerates the wear of the friction pad and the brake disc, shortening the overall service life. This technical pain point has become a key factor restricting the reliability and economy of the mechanical disc brake system.

[0004] Therefore, it is necessary to propose a brake with forced ventilation and heat dissipation to solve the above problems. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the defects of the prior art. The present invention proposes a brake with forced ventilation and heat dissipation, which solves the problem of poor heat dissipation effect of the brake disc of the prior art in the background technology.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A brake with forced ventilation and heat dissipation, comprising a brake caliper body arranged outside a brake disc, a first receiving groove arranged on the side wall of the inner cavity of the brake caliper body, and a friction plate movably arranged inside the first receiving groove; The brake caliper body is provided with a forced heat dissipation component, and the forced heat dissipation component includes a second accommodating groove arranged on the inner side of the end portion of the brake caliper body, the second accommodating groove is movably provided with a bracket, the first rotating shaft is rotatably provided on the bracket, and a friction wheel corresponding to the brake disc and used for rolling with the surface of the brake disc is fixed on the first rotating shaft, and the end of the friction plate is provided with a connecting plate extending into the inner cavity of the second accommodating groove and used for pulling the bracket to follow the displacement of the friction plate, and the side wall of the brake caliper body is provided with an air collecting hood connected with the second accommodating groove, and the air collecting hood is provided with a hollow heat dissipation ring on the side close to the brake disc, and the heat dissipation ring is connected with the air collecting hood, and an air outlet is provided on one side of the heat dissipation ring, and a second rotating shaft is rotatably provided inside the air collecting hood, and a heat dissipation fan blade is provided at one end of the second rotating shaft, one end of the second rotating shaft is connected to a connecting shaft through a one-way rotating component, and one end of the connecting shaft is connected to one end of the first rotating shaft through a movable connecting piece, and a cylinder for air intake is penetrated through the air collecting hood; The one-way rotating assembly comprises an outer sleeve arranged at one end of the connecting shaft, a one-way bearing is fixedly arranged on the inner wall of the outer sleeve, and one end of the second rotating shaft is fixed to the inner wall of the one-way bearing.

[0007] Preferably, the movable connecting part includes a movable hole arranged at one end of the first rotating shaft, a movable shaft is movably connected to the inner side of the movable hole along the axial direction of the first rotating shaft, a universal joint is arranged at one end of the movable shaft away from the first rotating shaft, and the end of the universal joint away from the movable shaft is fixed to one end of the connecting shaft.

[0008] Preferably, the movable axis is in the shape of a regular polygonal prism.

[0009] Preferably, a flywheel is fixedly disposed on the outer side of one end of the second rotating shaft.

[0010] Preferably, the heat dissipation ring is arranged in parallel with the brake disc, and the air outlet holes are evenly arranged around the side of the heat dissipation ring facing the brake disc.

[0011] Preferably, it also includes an elastic adaptive component, which includes a guide plate that is slidably guided and connected to the inner side of the second accommodating groove at one end away from the brake disc, and the end of the connecting plate away from the friction plate is fixedly connected to the side wall of the guide plate, and a first spring is arranged between the guide plate and the bracket.

[0012] Preferably, a T-shaped guide rod is provided on the bracket, and one end of the T-shaped guide rod passes through the guide plate and cooperates with the guide plate for movable guidance, and the first spring is sleeved on the outside of the T-shaped guide rod.

[0013] Preferably, a filter cartridge is movably provided inside the cylinder, one end of the filter cartridge extends to the inside of the wind collecting hood, the other end extends to the outside of the wind collecting hood, and the outer end of the filter cartridge is closed.

[0014] Preferably, the air collecting hood is provided with a centrifugal driving member for pushing the filter cartridge to move outward, the centrifugal driving member includes a hollow rod evenly arranged around the side wall of the second rotating shaft and corresponding to the filter cartridge, the inner side of one end of the hollow rod close to the filter cartridge is movably connected with a T-shaped rod along the radial direction of the second rotating shaft, a third spring is sleeved on the part of the T-shaped rod located on the inner side of the hollow rod, the end of the T-shaped rod away from the hollow rod is provided with a driving plate corresponding to the filter cartridge and in an arc shape, the end of the filter cartridge close to the second rotating shaft is rotatably provided with a roller corresponding to the driving plate, and the roller is used for rolling cooperation with the side of the driving plate away from the second rotating shaft; The inner side of the outer end of the cylinder is provided with an annular brush strip in contact with the outer wall of the filter cylinder; The filter cartridge is provided with a reset assembly, which includes a convex ring arranged on the outer side of one end of the filter cartridge close to the second rotating shaft, the convex ring corresponds to the cylinder body, and a second spring is arranged between the convex ring and the cylinder body.

[0015] Compared with the prior art, the beneficial effects of the present invention include: The brake with forced ventilation and heat dissipation synchronizes the displacement of the friction wheel and the friction plate in the forced heat dissipation component, and uses the rotation of the brake disc as power to realize the rotation of the friction wheel, thereby realizing the forced heat dissipation of the brake disc by the rotation of the heat dissipation fan blades. In addition, due to the setting of the one-way rotating component, the heat dissipation fan blades can continue to rotate for a period of time when the friction wheel stops, thereby improving the heat dissipation effect. The structure is compact, practical and convenient, and the overall service life is increased. The setting of the flywheel can use its rotational inertia to store kinetic energy, which is convenient for ensuring the rotation effect and time of the heat dissipation fan blades after the friction wheel stops, thereby ensuring the heat dissipation effect. The forced ventilation and heat dissipation brake can compensate for the wear of the friction wheel and the brake disc by means of the elastic adaptive component, thereby extending the service life of the friction wheel. The brake with forced ventilation and heat dissipation can prevent foreign impurities from entering the air collecting hood and affecting its use through the filter cartridge. The filter cartridge can be automatically cleaned by cooperating with the centrifugal drive component, the reset component and the brush strip to prevent blockage on the back and affect ventilation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them: Figure 1 The schematic diagram of the structure of the brake caliper body and the brake disc of the present invention in the assembled state is shown; Figure 2 The schematic diagram of the structure of the brake caliper body and the brake disc of the present invention in a disassembled state is shown; Figure 3The schematic diagram shows the structure of the brake caliper body, friction plate, heat dissipation ring and air collecting cover of the present invention in a disassembled state; Figure 4 A schematic diagram of a partial cross-sectional structure of a brake caliper body of the present invention is shown; Figure 5 Schematically shows Figure 4 Schematic diagram of the structure after the friction plate and air collecting cover on the foundation are removed; Figure 6 The schematic diagram of the structure of the wind collecting cover and the friction wheel of the present invention in the matching state is shown schematically; Figure 7 Schematically shows Figure 6 A structural diagram from another perspective based on the above; Figure 8 The schematic diagram shows the structure of the movable shaft and the first rotating shaft in a disassembled state; Fig. 9 The cross-sectional structure diagram of the air collecting hood of the present invention is schematically shown; Fig.10 The schematic diagram of the structure of the cylinder, filter cylinder, hollow rod and driving plate of the present invention in a disassembled state is shown; Fig.11 Schematically shows Fig.10 A structural diagram from another perspective based on the above; Fig.12 The cross-sectional structure diagram of the connection between the outer sleeve and the second rotating shaft is schematically shown.

[0017] Numbers in the figure: 1. brake caliper body; 2. piston rod; 3. heat dissipation ring; 4. air collecting cover; 5. friction plate; 6. friction wheel; 7. first accommodating groove; 8. air outlet; 9. second accommodating groove; 10. guide plate; 11. connecting plate; 12. one-way bearing; 13. connecting groove; 14. extension hole; 15. universal joint; 16. first rotating shaft; 17. movable shaft; 18. cylinder; 19. filter cylinder; 20. bracket; 21. first spring; 22. movable hole; 23. support plate; 24. T-shaped guide rod; 25. second rotating shaft; 26. connecting shaft; 27. outer sleeve; 28. flywheel; 29. ​​heat dissipation fan blade; 30. pipeline; 31. drive plate; 32. hollow rod; 33. brush strip; 34. convex ring; 35. second spring; 36. T-shaped rod; 37. third spring; 38. roller. DETAILED DESCRIPTION

[0018] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0019] In this embodiment, Figure 1-Figure 9 , Fig.12As shown, a brake with forced ventilation and heat dissipation includes a brake caliper body 1 arranged on the outside of a brake disc, a first receiving groove 7 arranged on the side wall of the inner cavity of the brake caliper body 1, a friction plate 5 movably arranged on the inner side of the first receiving groove 7, and a piston column 2 arranged on the back of the friction plate 5. When the rider pulls the brake handle, the steel cable or cable transmits force to the piston column 2 to push the friction plate 5 to move. A forced heat dissipation component is arranged on the brake caliper body 1, and the forced heat dissipation component includes a second receiving groove 9 arranged on the inner side of the end of the brake caliper body 1, and the second receiving groove 9 is movably provided with a bracket 20. The bracket 20 is rotatably provided with a first rotating shaft 16, and the first rotating shaft 16 is fixed with a friction wheel 6 corresponding to the brake disc and used for rolling with the surface of the brake disc. Specifically, the brake The inner cavity side wall of the caliper body 1 is provided with an extension hole 14 which is connected with the second accommodating groove 9 and is used for the friction wheel 6 to enter and exit. The friction wheel 6 extends toward the brake disc through the extension hole 14. The end of the friction plate 5 is provided with a connecting plate 11 which extends to the inner cavity of the second accommodating groove 9 and is used for the traction bracket 20 to follow the displacement of the friction plate 5. Specifically, the end of the first accommodating groove 7 close to the second accommodating groove 9 is provided with a connecting groove 13 which is connected with the second accommodating groove 9. The connecting plate 11 extends to the inner side of the second accommodating groove 9 through the connecting groove 13, and the connecting plate 11 is movably connected with the connecting groove 13. The side of the brake caliper body 1 close to the axis of the brake disc is provided with an air collecting hood 4 which is connected with the second accommodating groove 9. The side of the air collecting hood 4 close to the brake disc is provided with a hollow heat dissipation ring 3. In order to avoid heat dissipation Ring 3 affects the displacement of friction plate 5, and the heat dissipation ring 3 is corresponded to the inner periphery of the brake disc. The heat dissipation ring 3 is arranged parallel to the brake disc, and the heat dissipation ring 3 is connected with the air collecting cover 4. Specifically, a pipe 30 is arranged at one end of the air collecting cover 4, and the end of the pipe 30 away from the air collecting cover 4 is connected with the heat dissipation ring 3. One side of the heat dissipation ring 3 is provided with air outlet holes 8, and the air outlet holes 8 are evenly arranged around the side of the heat dissipation ring 3 facing the brake disc. The air outlet holes 8 are circular or arc-shaped strips, inclined toward the outer direction of the brake disc, to ensure that the heat dissipation ring 3 located on the inner periphery of the brake disc can blow the gas along the inclined direction of the air outlet holes 8 to the heating area outside the brake disc when the brake disc is purged through the air outlet holes 8. A second rotating shaft 25 is rotatably arranged inside the air collecting cover 4, and one end of the second rotating shaft 25 A heat dissipation fan blade 29 is provided, and one end of the second rotating shaft 25 is connected to the connecting shaft 26 through a one-way rotating component. Specifically, as a preferred embodiment, the one-way rotating component includes a sleeve 27 provided at one end of the connecting shaft 26, and the inner wall of the sleeve 27 is fixedly provided with a one-way bearing 12. One end of the second rotating shaft 25 is fixed to the inner wall of the one-way bearing 12, and one end of the connecting shaft 26 is connected to one end of the first rotating shaft 16 through a movable connecting piece. Specifically, as a preferred embodiment, the movable connecting piece includes a movable hole 22 provided at one end of the first rotating shaft 16, and the inner side of the movable hole 22 is movably connected with a movable shaft 17 along the axial direction of the first rotating shaft 16. The movable shaft 17 is a regular polygonal column, which can prevent the first rotating shaft 16 and the movable shaft 17 from rotating relative to each other.A universal joint 15 is provided at one end of the movable shaft 17 away from the first rotating shaft 16. The end of the universal joint 15 away from the movable shaft 17 is fixed to one end of the connecting shaft 26. A support plate 23 for blocking the air collecting hood 4 is provided at one end of the inner side of the air collecting hood 4 close to the brake caliper body 1. The connecting shaft 26 is rotatably connected to the support plate 23. The arrangement of the universal joint 15 and the movable shaft 17 can realize the driving rotation of the heat dissipation blade 29 when the bracket 20 drives the friction wheel 6 to move. In order to further improve the rotation effect and time of the heat dissipation blade 29, a flywheel 28 is fixedly provided on the outer side of one end of the second rotating shaft 25. A cylinder 18 for air intake is provided through the air collecting hood 4.

[0020] like Figure 6-Figure 8 As shown, in order to compensate for the wear of the friction wheel 6, it also includes an elastic adaptive component, which includes a guide plate 10 that is slidingly guided and connected to the inner side of the second accommodating groove 9 at one end away from the brake disc, and the end of the connecting plate 11 away from the friction plate 5 is fixedly connected to the side wall of the guide plate 10, and a first spring 21 is arranged between the guide plate 10 and the bracket 20. In order to increase the stability of the bracket 20, a T-shaped guide rod 24 is arranged on the bracket 20, and one end of the T-shaped guide rod 24 passes through the guide plate 10 and cooperates with the movable guide of the guide plate 10, and the first spring 21 is sleeved on the outside of the T-shaped guide rod 24.

[0021] In addition, if Figure 6-Figure 11 As shown, in order to prevent foreign matter from entering the interior of the wind collecting hood 4 through the cylinder 18, a filter cylinder 19 is movably arranged inside the cylinder 18, one end of the filter cylinder 19 extends to the inside of the wind collecting hood 4, and the other end extends to the outside of the wind collecting hood 4, and the outer end of the filter cylinder 19 is closed; Furthermore, in order to automatically clean the filter cartridge 19, a brush strip 33 in an annular shape that contacts the outer wall of the filter cartridge 19 is provided on the inner side of the outer end of the cylinder body 18, and a centrifugal drive member for pushing the filter cartridge 19 to move outward is provided on the wind collecting cover 4, and the centrifugal drive member includes a hollow rod 32 that is evenly arranged around the side wall of the second rotating shaft 25 and corresponds to the filter cartridge 19, and a T-shaped rod 36 is movably connected to the inner side of one end of the hollow rod 32 close to the filter cartridge 19 along the radial direction of the second rotating shaft 25, and a third elastic member is sleeved on the part of the T-shaped rod 36 located on the inner side of the hollow rod 32 Spring 37, the end of the T-shaped rod 36 away from the hollow rod 32 is provided with an arc-shaped driving plate 31 corresponding to the filter cartridge 19, and the end of the filter cartridge 19 close to the second rotating shaft 25 is rotatably provided with a roller 38 corresponding to the driving plate 31, and the roller 38 is used for rolling cooperation with the side of the driving plate 31 away from the second rotating shaft 25. A reset assembly is provided on the filter cartridge 19, and the reset assembly includes a convex ring 34 arranged on the outer side of one end of the filter cartridge 19 close to the second rotating shaft 25, the convex ring 34 corresponds to the cylinder 18, and a second spring 35 is provided between the convex ring 34 and the cylinder 18.

[0022] When in use, the piston column 2 drives the friction plate 5 to move when braking, and the friction plate 5 drives the guide plate 10 and the bracket 20 to move as a whole through the connecting plate 11, and the bracket 20 drives the friction wheel 6 to approach the brake disc, and the friction plate 5 performs friction braking on the brake disc. When the friction wheel 6 fits the brake disc, the friction wheel 6 will drive the first rotating shaft 16 to rotate due to the effect of friction, and due to the effect of the universal joint 15, the movable shaft 17, and the movable hole 22, the connecting shaft 26 can be driven to rotate, and the connecting shaft 26 drives the second rotating shaft 25 to rotate through the outer sleeve 27 and the one-way bearing 12, and the second rotating shaft 25 drives the heat dissipation fan blades 29, the flywheel 28, and the hollow rod 32 to rotate synchronously. The rotation of the heat dissipation fan blades 29 generates negative pressure at one end of the wind collecting cover 4, and the rotation of the flywheel 28 can use its rotational inertia to store kinetic energy. The rotation of the hollow rod 32 will drive the driving plate 31 to rotate, and under the action of centrifugal force, the T-shaped rod 36 drives the driving plate 31 to move outward, and the third spring 37 is compressed. When the air passes through the filter cartridge 19, it pushes the roller 38, and the roller 38 is pressed to drive the filter cartridge 19 to move outward, and the second spring 35 is compressed. The external air enters the wind collecting cover 4 after being filtered by the filter cartridge 19, and then enters the heat dissipation ring 3, and finally blows to the brake disc through the air outlet 8. When the friction plate 5 drives the friction wheel 6 to separate from the brake disc or the friction plate 5 stops the brake disc, the friction wheel 6 will slow down and stop. At this time, due to the action of the flywheel 28 and the one-way bearing 12, the heat dissipation fan blades 29 will continue to rotate for a period of time, and then continue to force ventilation and heat dissipation for the brake disc, thereby improving the heat dissipation effect and extending the service life of the brake disc. In addition, when the second rotating shaft 25 gradually slows down to stop, the third spring 37 drives the T-bar 36 and the driving plate 31 to reset, and the second spring 35 drives the filter cartridge 19 to reset. When the filter cartridge 19 is recovered, it will pass through the brush strip 33, and then the brush strip 33 can clean the surface of the filter cartridge 19. Impurities attached to the back side will block the subsequent ventilation and heat dissipation.

[0023] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A brake with forced ventilation and heat dissipation, characterized in that: It comprises a brake caliper body (1) arranged on the outside of a brake disc, a first receiving groove (7) arranged on the side wall of the inner cavity of the brake caliper body (1), and a friction plate (5) movably arranged on the inside of the first receiving groove (7); The brake caliper body (1) is provided with a forced heat dissipation component, the forced heat dissipation component comprising a second receiving groove (9) provided on the inner side of the end of the brake caliper body (1), the second receiving groove (9) being movably provided with a bracket (20), the bracket (20) being rotatably provided with a first rotating shaft (16), the first rotating shaft (16) being fixed with a friction wheel (6) corresponding to the brake disc and used for rolling with the surface of the brake disc, the end of the friction plate (5) being provided with a connecting plate (11) extending into the inner cavity of the second receiving groove (9) and used for pulling the bracket (20) to follow the displacement of the friction plate (5), the side wall of the brake caliper body (1) being provided with a connecting plate (11) connected to the second receiving groove ( 9) a wind collecting hood (4) connected thereto, wherein a hollow heat dissipation ring (3) is arranged on one side of the wind collecting hood (4) close to the brake disc, and the heat dissipation ring (3) is connected to the wind collecting hood (4), and an air outlet (8) is arranged on one side of the heat dissipation ring (3), and a second rotating shaft (25) is rotatably arranged inside the wind collecting hood (4), and a heat dissipation fan blade (29) is arranged at one end of the second rotating shaft (25), and one end of the second rotating shaft (25) is connected to a connecting shaft (26) through a one-way rotating component, and one end of the connecting shaft (26) is connected to one end of the first rotating shaft (16) through a movable connecting piece, and a cylinder (18) for air intake is arranged through the wind collecting hood (4); The one-way rotating assembly comprises an outer sleeve (27) arranged at one end of the connecting shaft (26), a one-way bearing (12) being fixedly arranged on the inner wall of the outer sleeve (27), and one end of the second rotating shaft (25) is fixed to the inner wall of the one-way bearing (12).

2. A brake with forced ventilation and heat dissipation according to claim 1, characterized in that: The movable connecting member comprises a movable hole (22) arranged at one end of the first rotating shaft (16); a movable shaft (17) is movably connected to the inner side of the movable hole (22) along the axial direction of the first rotating shaft (16); a universal joint (15) is arranged at one end of the movable shaft (17) away from the first rotating shaft (16); and the end of the universal joint (15) away from the movable shaft (17) is fixed to one end of the connecting shaft (26).

3. A brake with forced ventilation and heat dissipation according to claim 2, characterized in that: The movable shaft (17) is in the shape of a regular polygonal column.

4. A brake with forced ventilation and heat dissipation according to claim 1, characterized in that: A flywheel (28) is fixedly disposed on the outer side of one end of the second rotating shaft (25).

5. The brake with forced ventilation and heat dissipation according to claim 1, characterized in that: The heat dissipation ring (3) is arranged in parallel with the brake disc, and the air outlet holes (8) are evenly arranged around the side of the heat dissipation ring (3) facing the brake disc.

6. A brake with forced ventilation and heat dissipation according to claim 1, characterized in that: It also includes an elastic self-adaptive component, the elastic self-adaptive component including a guide plate (10) slidably connected to an end of the inner side of the second receiving groove (9) away from the brake disc, the end of the connecting plate (11) away from the friction plate (5) is fixedly connected to the side wall of the guide plate (10), and a first spring (21) is provided between the guide plate (10) and the bracket (20).

7. A brake with forced ventilation and heat dissipation according to claim 6, characterized in that: The bracket (20) is provided with a T-shaped guide rod (24), one end of which passes through the guide plate (10) and is movably guided by the guide plate (10), and the first spring (21) is sleeved on the outside of the T-shaped guide rod (24).

8. The brake with forced ventilation and heat dissipation according to claim 1, characterized in that: A filter cartridge (19) is movably disposed inside the cylinder (18), one end of the filter cartridge (19) extends to the inside of the wind collecting hood (4), and the other end extends to the outside of the wind collecting hood (4), and the outer end of the filter cartridge (19) is in a closed shape.

9. A brake with forced ventilation and heat dissipation according to claim 8, characterized in that: The wind collecting cover (4) is provided with a centrifugal driving member for pushing the filter cartridge (19) to move outward, the centrifugal driving member comprising a hollow rod (32) evenly arranged around the side wall of the second rotating shaft (25) and corresponding to the filter cartridge (19); the inner side of one end of the hollow rod (32) close to the filter cartridge (19) is movably connected with a T-shaped rod (36) along the radial direction of the second rotating shaft (25); a third spring (37) is sleeved on the part of the T-shaped rod (36) located on the inner side of the hollow rod (32); an arc-shaped driving plate (31) corresponding to the filter cartridge (19) is provided at one end of the T-shaped rod (36) away from the hollow rod (32); a roller (38) corresponding to the driving plate (31) is rotatably provided at one end of the filter cartridge (19) close to the second rotating shaft (25); the roller (38) is used for rolling cooperation with the side of the driving plate (31) away from the second rotating shaft (25); An annular brush strip (33) in contact with the outer wall of the filter cartridge (19) is provided on the inner side of the outer end of the cylinder (18); The filter cartridge (19) is provided with a reset assembly, the reset assembly comprising a convex ring (34) arranged on the outside of one end of the filter cartridge (19) close to the second rotating shaft (25), the convex ring (34) corresponding to the cartridge body (18), and a second spring (35) arranged between the convex ring (34) and the cartridge body (18).

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