Brake pad wear detection device

Abstract

The utility model discloses a brake pad wear detection device, which comprises a supporting base, a fixed shell and an annular toothed plate are arranged at the top of the supporting base, and two supporting pieces which are distributed up and down are connected to the side surface of the annular toothed plate in a sliding manner; the clamping plate is used for clamping and fixing the brake pad; the detection assembly is used for detecting the brake pad; and the rotating assembly is used for rotating the annular toothed plate. According to the utility model, the annular toothed plate can be rotated by using the rotating assembly so as to rotate the brake pad, and meanwhile, the thickness of different positions of the brake pad can be detected by cooperating with the movable detection assembly, so that the wear degrees of different positions of the brake pad can be confirmed, and the wear degree detection accuracy of the brake pad is improved.

Description

Technical Field

[0001] The utility model relates to the field of brake pad detection, in particular to a brake pad wear detection device. Background Art

[0002] Brake pads are typically constructed of steel plates, an adhesive insulation layer, and friction blocks. The steel plates are coated to prevent rust, and the coating process is monitored using an SMT-4 oven temperature tracker to monitor temperature distribution and ensure quality. In a car's braking system, brake pads are the most critical safety component, decisive for braking performance. Therefore, they are considered the protectors of both drivers and vehicles. Braking primarily relies on friction, utilizing the friction between the brake pads and the brake disc (drum), and between the tires and the road, to convert the vehicle's kinetic energy into frictional heat, ultimately stopping the vehicle. A well-functioning brake system must provide stable, sufficient, and controllable braking force, as well as possess excellent hydraulic transmission and heat dissipation capabilities. This ensures that the driver's brake pedal force is effectively transmitted to the master and slave cylinders, preventing hydraulic failure and brake fade caused by excessive heat.

[0003] Wear of the brake pads will have an adverse effect on braking. When the brake pads are severely worn, they will not have a braking effect. In the authorized Chinese utility model patent "Announcement No.: CN221325402U, Name: A Brake Pad Wear Detector", it uses a laser rangefinder to emit laser, and then the reflective sheet reflects the laser back, which can automatically calculate the thickness of the brake pad and feed the thickness data back to the control panel. The brake pad thickness data detected by the laser rangefinder can be used to determine the wear status of the brake pad, so that personnel can understand the degree of wear of the brake pad. However, in the above application, the laser rangefinder can only detect the thickness of the thickest part of the brake pad, that is, it is difficult to detect the degree of wear of other parts of the brake pad that are smaller than the thickest part, which makes the detection accuracy of the brake pad low, affecting the judgment of the degree of wear of the brake pad. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a brake pad wear detection device in order to overcome the defect in the prior art that the thickness of the brake pad at different positions is difficult to detect one by one.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] The utility model provides a brake pad wear detection device, comprising a support base, a fixed shell is installed on the top of the support base,

[0007] An annular tooth plate, the annular tooth plate is arranged in the inner cavity of the fixed shell, and the side of the annular tooth plate is slidably connected to two supporting members distributed up and down;

[0008] Clamping plates: two clamping plates distributed up and down are provided on the inner side of the annular gear plate, and the clamping plates are used to clamp and fix the brake pads;

[0009] A power assembly, wherein the two clamping plates are respectively connected to the power assembly, the power assembly is installed in the annular gear plate, and the power assembly is used to adjust the position of the clamping plates;

[0010] A detection component is installed on the top of the support base, and the detection component is used to detect the brake pad;

[0011] A rotating assembly is connected to the bottom of the annular gear plate and is installed on the top of the supporting base. The rotating assembly is used to rotate the annular gear plate.

[0012] In this technical solution, the position of the clamping plate can be adjusted by using a power component, so that the brake pad can be clamped and fixed by using the clamping plates on both sides. The annular gear plate can be rotated by using a rotating component, so as to rotate the brake pad. At the same time, the thickness of the brake pad can be detected at different positions in conjunction with the movable detection component, so as to confirm the degree of wear of the brake pad at different positions and improve the accuracy of the brake pad wear detection.

[0013] Preferably, the power assembly includes a bidirectional threaded column, and the inner cavity side wall of the annular gear plate is rotatably connected to two symmetrically distributed bidirectional threaded columns;

[0014] The surface of the bidirectional threaded column is threadedly connected to two movable plates symmetrically distributed up and down, one side of the movable plate is connected to a connecting column, and the connecting column is slidably connected to the inner side of the annular gear plate;

[0015] One end of the connecting column away from the movable plate is connected to the side surface of the clamping plate.

[0016] In this technical solution, the position of the clamping plate can be adjusted by using a power assembly, so that the brake pad can be installed and removed.

[0017] Preferably, a bidirectional driving source is installed on the inner cavity side wall of the annular gear plate, and both output ends of the bidirectional driving source are connected to a transmission shaft;

[0018] One end of the transmission shaft away from the bidirectional driving source is connected to a transmission part, and the transmission part is connected to the bottom end of the bidirectional threaded column.

[0019] In this technical solution, a bidirectional driving source can be used to provide driving force for the rotation of the transmission shaft.

[0020] Preferably, the transmission part includes two bevel gears, and the two bevel gears are meshed and connected with each other;

[0021] One of the bevel gears is connected to an end of the transmission shaft away from a bidirectional driving source, and the other bevel gear is connected to the bottom end of the bidirectional threaded column.

[0022] In this technical solution, the transmission part can be used to connect the transmission shaft and the bidirectional threaded column.

[0023] Preferably, the detection component includes a laser distance measuring instrument, and the laser distance measuring instrument is provided on both the left and right sides of the annular gear plate, and the laser distance measuring instrument is installed on the top of the mounting plate;

[0024] The bottom of the mounting plate is connected to a fixed plate, the bottom of the fixed plate is connected to the top of the sliding plate, and the sliding plate is slidably connected to the top surface of the support base;

[0025] The sliding plate is threadedly connected to the surface of the one-way threaded column, and the one-way threaded column is rotatably connected to the side wall of the inner cavity of the support base;

[0026] A plurality of limiting bars are connected to the inner wall of the support base, and the limiting bars are slidably connected to the side surfaces of the sliding plate.

[0027] In this technical solution, the thickness of the brake pad can be detected by using the detection component.

[0028] Preferably, the one-way threaded columns on both sides are connected by a transmission assembly, and the transmission assembly includes a mounting shell, and the mounting shell is mounted on one side of the support base;

[0029] Two symmetrically distributed sprockets are provided on the inner side of the mounting shell. The side surfaces of the sprockets are engaged with the chain. The two sprockets are connected through chain transmission. The two sprockets are respectively connected to one end of the one-way threaded column.

[0030] In this technical solution, the transmission assembly can be used to make the one-way threaded columns on both sides rotate synchronously, so that the laser distance measuring instruments on both sides can be in the same straight line.

[0031] Preferably, the support member includes a connecting plate, and two connecting plates are provided on both sides of the annular gear plate and distributed vertically;

[0032] A plurality of anti-slip columns are connected to one side opposite to the two connecting plates, and the anti-slip columns are slidably connected to the side surfaces of the annular tooth plate.

[0033] In this technical solution, the annular gear plate can be supported by the support member, thereby facilitating the rotation of the annular gear plate.

[0034] Preferably, both sides of the annular tooth plate are provided with sliding grooves, and the anti-slip columns slide in the sliding grooves;

[0035] The connecting plate located at the top is connected to the inner wall of the top surface of the fixed shell, and the connecting plate located at the bottom is connected to the top of the supporting base.

[0036] In this technical solution, when the annular gear plate rotates, the anti-slip column slides in the sliding groove.

[0037] Preferably, the rotating assembly includes a rotating gear, and the side surface of the rotating gear is meshedly connected with the bottom side of the annular gear plate;

[0038] The rotating gear is fixed to the surface of the rotating shaft, and both ends of the rotating shaft are rotatably connected to support side plates, and the support side plates are installed on the top of the support base;

[0039] One end of the rotating shaft is connected to the output end of a power source, and the power source is installed on one side of the supporting side plate.

[0040] In this technical solution, the rotating assembly can be used to rotate the annular gear plate, thereby rotating the brake pad.

[0041] Preferably, one end of the rotating shaft is rotatably connected to one side of a supporting side plate, and the other end of the rotating shaft is rotatably connected to the other supporting side plate;

[0042] The surface of the rotating shaft is fixedly connected to the rotating gear.

[0043] In this technical solution, the rotating shaft can be supported by the supporting side plates.

[0044] On the basis of conforming to the common sense in this field, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present utility model.

[0045] The positive progress effect of this utility model is:

[0046] The utility model utilizes a power component to adjust the position of the clamping plate, thereby utilizing the clamping plates on both sides to secondary clamp and fix the brake pad, utilizes a rotating component to rotate the annular gear plate, thereby rotating the brake pad, and simultaneously cooperates with a movable detection component to perform thickness detection on different positions of the brake pad, thereby confirming the degree of wear of different positions of the brake pad and improving the accuracy of brake pad wear detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 This is a structural schematic diagram of a brake pad wear detection device according to an embodiment of the present utility model.

[0048] Figure 2 for Figure 1 The internal structure diagram of the brake pad wear detection device is shown.

[0049] Figure 3 for Figure 1The side structural schematic diagram of the brake pad wear detection device shown.

[0050] Figure 4 for Figure 1 The diagram shows the transmission component structure of the brake pad wear detection device.

[0051] Figure 5 for Figure 2 The diagram shows a partial enlarged structural diagram of the brake pad wear detection device at point A.

[0052] Description of Reference Numerals

[0053] 1. Support base;

[0054] 2. Fix the shell;

[0055] 3. Annular gear plate;

[0056] 4. Clamping plate;

[0057] 5. Power assembly; 51. Bidirectional threaded column; 52. Moving plate; 53. Connecting column; 54. Bidirectional driving source; 55. Transmission shaft; 56. Transmission unit;

[0058] 6. Detection assembly; 61. Laser rangefinder; 62. Mounting plate; 63. Fixed plate; 64. Sliding plate; 65. One-way threaded column; 66. Limit strip;

[0059] 7. Support member; 71. Connecting plate; 72. Anti-fall column;

[0060] 8. Rotating assembly; 81. Rotating gear; 82. Rotating shaft; 83. Supporting side plate; 84. Power source;

[0061] 9. Transmission assembly; 91. Mounting housing; 92. Sprocket; 93. Chain; 94. One-way drive source. DETAILED DESCRIPTION

[0062] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0063] Figures 1 to 5 The figure shows the structure of the embodiment of the brake pad wear detection device of the present invention. The brake pad wear detection device comprises a support base 1, a fixed housing 2 is mounted on the top of the support base 1,

[0064] An annular toothed plate 3 is provided in the inner cavity of the fixed housing 2, and two upper and lower supporting members 7 are slidably connected to the side of the annular toothed plate 3;

[0065] Clamping plates 4: Two clamping plates 4 are arranged on the inner side of the annular gear plate 3 and are distributed up and down. The clamping plates 4 are used to clamp and fix the brake pads.

[0066] A power assembly 5, wherein the two clamping plates 4 are respectively connected to the power assembly 5, and the power assembly 5 is installed in the annular gear plate 3, and the power assembly 5 is used to adjust the position of the clamping plates 4;

[0067] A detection component 6 is installed on the top of the support base 1, and the detection component 6 is used to detect the brake pad;

[0068] The rotating assembly 8 is connected to the bottom of the annular gear plate 3 and is installed on the top of the supporting base 1 . The rotating assembly 8 is used to rotate the annular gear plate 3 .

[0069] In this technical solution, the power component 5 can be used to adjust the position of the clamping plate 4, so that the clamping plates 4 on both sides can be used to clamp and fix the brake pad. The rotating component 8 can be used to rotate the annular gear plate 3, thereby rotating the brake pad. At the same time, the movable detection component 6 can be used to detect the thickness of different positions of the brake pad, so as to confirm the degree of wear of different positions of the brake pad and improve the accuracy of the brake pad wear detection.

[0070] The power assembly 5 includes a bidirectional threaded column 51, and the inner cavity side wall of the annular gear plate 3 is rotatably connected to two symmetrically distributed bidirectional threaded columns 51;

[0071] The surface of the bidirectional threaded column 51 is threadedly connected to two movable plates 52 symmetrically distributed up and down. One side of the movable plate 52 is connected to a connecting column 53, and the connecting column 53 is slidably connected to the inner side of the annular gear plate 3;

[0072] One end of the connecting post 53 away from the moving plate 52 is connected to the side surface of the clamping plate 4 .

[0073] In this technical solution, the position of the clamping plate 4 can be adjusted by using the power assembly 5, so that the brake pad can be installed and removed.

[0074] A bidirectional driving source 54 is installed on the inner side wall of the annular gear plate 3, and both output ends of the bidirectional driving source 54 are connected to a transmission shaft 55;

[0075] One end of the transmission shaft 55 away from the bidirectional driving source 54 is connected to a transmission part 56 , and the transmission part 56 is connected to the bottom end of the bidirectional threaded column 51 .

[0076] In this technical solution, a bidirectional driving source 54 can be used to provide driving force for the rotation of the transmission shaft 55 .

[0077] The transmission part 56 includes two bevel gears, which are meshed and connected with each other;

[0078] One of the bevel gears is connected to an end of the transmission shaft 55 away from the bidirectional driving source 54 , and the other bevel gear is connected to the bottom end of the bidirectional threaded column 51 .

[0079] In this technical solution, the transmission part 56 can be used to connect the transmission shaft 55 and the bidirectional threaded column 51.

[0080] When in use, the brake pad is placed between the two clamping plates 4, and then the bidirectional driving source 54 is used to drive the transmission shaft 55 to rotate, thereby driving the transmission part 56 to rotate, and at this time, the bidirectional threaded column 51 can be driven to rotate;

[0081] When the bidirectional threaded column 51 rotates, it can drive the moving plate 52 of the incoming test to move in the opposite direction, thereby driving the connecting column 53 to move in the same direction, and then driving the clamping plate 4 to move in the same direction, so that the clamping plates 4 on both sides can be close to the two sides of the brake pad, thereby clamping and fixing the brake pad;

[0082] After the inspection is completed, the brake pads can be removed using the reverse method.

[0083] The detection assembly 6 includes a laser distance measuring instrument 61. The laser distance measuring instrument 61 is provided on both sides of the annular gear plate 3. The laser distance measuring instrument 61 is installed on the top of the mounting plate 62.

[0084] The bottom of the mounting plate 62 is connected to a fixed plate 63, the bottom of the fixed plate 63 is connected to the top of the sliding plate 64, and the sliding plate 64 is slidably connected to the top surface of the support base 1;

[0085] The sliding plate 64 is threadedly connected to the surface of the one-way threaded column 65, and the one-way threaded column 65 is rotatably connected to the side wall of the inner cavity of the support base 1;

[0086] A plurality of limiting bars 66 are connected to the inner wall of the support base 1 , and the limiting bars 66 are slidably connected to the side surfaces of the sliding plate 64 .

[0087] In this technical solution, the thickness of the brake pad can be detected by using the detection component 6.

[0088] The one-way threaded columns 65 on both sides are connected by a transmission assembly 9. The transmission assembly 9 includes a mounting housing 91. The mounting housing 91 is mounted on one side of the support base 1.

[0089] Two symmetrically distributed sprockets 92 are provided inside the mounting housing 91 , and the sides of the sprockets 92 are meshed with the chain 93 . The two sprockets 92 are connected through the chain 93 , and the two sprockets 92 are respectively connected to one end of the one-way threaded column 65 .

[0090] In this technical solution, the transmission assembly 9 can be used to make the one-way threaded columns 65 on both sides rotate synchronously, so that the laser distance measuring instruments 61 on both sides can be located in the same straight line.

[0091] When in use, the laser distance measuring instruments 61 on both sides can be used to measure the distance between the laser distance measuring instruments 61 and the brake pad respectively. Then, the distance between the two laser distance measuring instruments 61 minus the length data measured by the two laser distance measuring instruments 61 is the thickness of the brake pad at this location. This is compared with the data of the intact brake pad to determine the degree of wear of the brake pad.

[0092] During testing, the rotating assembly 8 can drive the annular gear plate 3 to rotate, thereby driving the brake pad to rotate;

[0093] At the same time, the transmission assembly 9 can be used to make the one-way threaded columns 65 on both sides rotate synchronously, thereby driving the sliding plate 64 to move along the limit bar 66, thereby driving the fixed plate 63 and the mounting plate 62 to move in the same direction, and then driving the laser distance measuring instrument 61 to move in the same direction. The position of the laser distance measuring instruments 61 on both sides can be adjusted, and in conjunction with the rotation of the brake pad, the thickness of the brake pad at different positions can be detected.

[0094] When in use, the one-way driving source 94 drives the corresponding sprocket 92 to rotate, thereby driving the chain 93 to rotate, and then driving the other sprocket 92 to rotate. When the sprockets 92 on both sides rotate, they can synchronously drive the two one-way threaded columns 65 to rotate.

[0095] The support member 7 includes a connecting plate 71, and two connecting plates 71 are provided on both sides of the annular gear plate 3;

[0096] A plurality of anti-slip columns 72 are connected to opposite sides of the two connecting plates 71 , and the anti-slip columns 72 are slidably connected to the side surfaces of the annular gear plate 3 .

[0097] In this technical solution, the support member 7 can be used to support the annular gear plate 3, thereby facilitating the rotation of the annular gear plate 3.

[0098] Sliding grooves are provided on both sides of the annular gear plate 3, and the anti-slip columns 72 slide in the sliding grooves;

[0099] The upper connecting plate 71 is connected to the inner wall of the top surface of the fixed shell 2 , and the lower connecting plate 71 is connected to the top of the supporting base 1 .

[0100] In this technical solution, when the annular gear plate 3 rotates, the anti-slip column 72 slides in the sliding groove.

[0101] The rotating assembly 8 includes a rotating gear 81, the side of which is meshed with the bottom side of the annular gear plate 3;

[0102] The rotating gear 81 is fixed to the surface of the rotating shaft 82. Both ends of the rotating shaft 82 are rotatably connected to the supporting side plates 83. The supporting side plates 83 are installed on the top of the supporting base 1.

[0103] One end of the rotating shaft 82 is connected to the output end of a power source 84 , and the power source 84 is installed on one side of the supporting side plate 83 .

[0104] In this technical solution, the rotating assembly 8 can be used to rotate the annular gear plate 3, thereby rotating the brake pad.

[0105] One end of the rotating shaft 82 is rotatably connected to one side of a supporting side plate 83, and the other end of the rotating shaft 82 is rotatably connected to the other supporting side plate 83;

[0106] The surface of the rotating shaft 82 is fixedly connected to the rotating gear 81 through the surface.

[0107] In this technical solution, the supporting side plates 83 can be used to support the rotating shaft 82 .

[0108] During use, the power source 84 drives the rotating shaft 82 to rotate, thereby driving the rotating gear 81 to rotate, and then driving the annular gear plate 3 to rotate, and at this time, the clamping plate 4 and the brake pad can be driven to rotate.

[0109] The bidirectional driving source 54 is a biaxial motor or other equipment that can output bidirectional rotational kinetic energy.

[0110] The unidirectional drive source 94 and the power source 84 are motors or other devices that can output rotational kinetic energy.

[0111] Although specific embodiments of the present invention have been described above, those skilled in the art will appreciate that these are merely illustrative and that the scope of protection of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, and such changes and modifications are intended to fall within the scope of protection of the present invention.

Claims

1. A brake pad wear detection device, comprising a support base (1), a fixed housing (2) mounted on the top of the support base (1), characterized in that: The brake pad wear detection device further comprises: an annular tooth plate (3), the annular tooth plate (3) being arranged in the inner cavity of the fixed housing (2), and two supporting members (7) distributed up and down being slidably connected to the side of the annular tooth plate (3); A clamping plate (4), wherein two clamping plates (4) are arranged on the inner side of the annular gear plate (3) and are distributed up and down, and the clamping plates (4) are used to clamp and fix the brake pads; A power assembly (5), wherein the two clamping plates (4) are respectively connected to the power assembly (5), the power assembly (5) is installed in the annular gear plate (3), and the power assembly (5) is used to adjust the position of the clamping plates (4); A detection component (6), the detection component (6) is installed on the top of the support base (1), and the detection component (6) is used to detect the brake pad; A rotating assembly (8) is connected to the bottom of the annular gear plate (3), and the rotating assembly (8) is installed on the top of the supporting base (1), and the rotating assembly (8) is used to rotate the annular gear plate (3).

2. The brake pad wear detection device according to claim 1, wherein: The power assembly (5) includes a bidirectional threaded column (51), and the inner cavity side wall of the annular gear plate (3) is rotatably connected to two symmetrically distributed bidirectional threaded columns (51); The surface of the bidirectional threaded column (51) is threadedly connected to two movable plates (52) symmetrically distributed up and down, and one side of the movable plate (52) is connected to a connecting column (53), and the connecting column (53) is slidably connected to the inner side surface of the annular gear plate (3); One end of the connecting column (53) away from the movable plate (52) is connected to the side surface of the clamping plate (4).

3. The brake pad wear detection device according to claim 2, wherein: A bidirectional driving source (54) is installed on the inner cavity side wall of the annular gear plate (3), and both output ends of the bidirectional driving source (54) are connected to a transmission shaft (55); One end of the transmission shaft (55) away from the bidirectional driving source (54) is connected to a transmission part (56), and the transmission part (56) is connected to the bottom end of the bidirectional threaded column (51).

4. The brake pad wear detection device according to claim 3, wherein: The transmission part (56) includes two bevel gears, and the two bevel gears are meshed and connected with each other; One of the bevel gears is connected to an end of the transmission shaft (55) away from the bidirectional driving source (54), and the other bevel gear is connected to the bottom end of the bidirectional threaded column (51).

5. The brake pad wear detection device according to claim 1, wherein: The detection assembly (6) includes a laser distance measuring instrument (61), and the laser distance measuring instrument (61) is provided on both the left and right sides of the annular gear plate (3), and the laser distance measuring instrument (61) is installed on the top of the mounting plate (62); The bottom of the mounting plate (62) is connected to a fixed plate (63), the bottom of the fixed plate (63) is connected to the top of a sliding plate (64), and the sliding plate (64) is slidably connected to the top surface of the support base (1); The sliding plate (64) is threadedly connected to the surface of the one-way threaded column (65), and the one-way threaded column (65) is rotatably connected to the side wall of the inner cavity of the support base (1); The inner wall of the support base (1) is connected to a plurality of limit bars (66), and the limit bars (66) are slidably connected to the side of the sliding plate (64).

6. The brake pad wear detection device according to claim 5, characterized in that: The one-way threaded columns (65) on both sides are connected by a transmission assembly (9), wherein the transmission assembly (9) comprises a mounting housing (91), and the mounting housing (91) is mounted on one side of the support base (1); Two symmetrically distributed sprockets (92) are provided inside the mounting housing (91), the side surfaces of the sprockets (92) are meshed and connected with a chain (93), the two sprockets (92) are connected by transmission through the chain (93), and the two sprockets (92) are respectively connected to one end of a one-way threaded column (65).

7. The brake pad wear detection device according to claim 1, wherein: The support member (7) includes a connecting plate (71), and two connecting plates (71) are provided on both the left and right sides of the annular gear plate (3) and are distributed up and down; A plurality of anti-slip columns (72) are connected to opposite sides of the two connecting plates (71), and the anti-slip columns (72) are slidably connected to the side surfaces of the annular tooth plate (3).

8. The brake pad wear detection device according to claim 7, wherein: Sliding grooves are provided on both sides of the annular tooth plate (3), and the anti-slip columns (72) slide in the sliding grooves; The connecting plate (71) located at the top is connected to the inner wall of the top surface of the fixed shell (2), and the connecting plate (71) located at the bottom is connected to the top of the supporting base (1).

9. The brake pad wear detection device according to claim 1, wherein: The rotating assembly (8) includes a rotating gear (81), and the side surface of the rotating gear (81) is meshedly connected with the bottom side of the annular gear plate (3); The rotating gear (81) is fixed to the surface of the rotating shaft (82), and both ends of the rotating shaft (82) are rotatably connected to support side plates (83), and the support side plates (83) are installed on the top of the support base (1); One end of the rotating shaft (82) is connected to the output end of a power source (84), and the power source (84) is installed on one side of the supporting side plate (83).

10. The brake pad wear detection device according to claim 9, wherein: One end of the rotating shaft (82) is rotatably connected to one side of a supporting side plate (83), and the other end of the rotating shaft (82) is rotatably connected to the other supporting side plate (83); The surface of the rotating shaft (82) is fixedly connected to the rotating gear (81).

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