Damping type brake box

Abstract

The invention belongs to the technical field of mechanical braking, and provides a damping type brake box which comprises a key sleeve installed in a box body, a damper shaft movably connected with the key sleeve is arranged in the key sleeve, a driving disc is arranged on the damper shaft, a threaded part is arranged at the end, extending out of the box body, of the damper shaft, and an adjusting nut matched with the threaded part is arranged on the threaded part. The damper shaft is provided with driving friction plates which are distributed at intervals and connected with the key sleeve, a driven friction plate which moves synchronously with the damper shaft is arranged between every two adjacent driving friction plates, and the driving friction plates and the driven friction plates are movably located on the damper shaft. The pressure assembly is located on the damper shaft and located on the side, close to the driven friction plate, of the driving disc, and the pressure assembly enables the driving friction plate and the driven friction plate to be close to each other; through the arranged adjusting device, the friction plate can be controlled.

Description

Technical Field

[0001] The present invention belongs to the technical field of mechanical braking, and more specifically, it is a damping brake box. Background Art

[0002] A damping brake box is a device that combines damping technology and braking function, and is usually used in industrial scenarios that require smooth deceleration or precise braking. It absorbs or dissipates the kinetic energy of moving parts through damping elements (such as hydraulic dampers, friction dampers, etc.) to achieve deceleration or stop.

[0003] It is mainly applied to industrial machinery: used in equipment such as cranes, elevators, and conveyor belts to achieve smooth stop or prevent overshoot.

[0004] Transportation: In rail transit (such as subways, high-speed rails), it is used in the vehicle braking system to improve braking smoothness and safety.

[0005] Energy equipment: Used for speed regulation and braking of equipment such as wind turbines and water turbines to protect the equipment from impact.

[0006] Precision instruments: In equipment such as numerical control machine tools and robots, it is used to precisely control the stop position of moving parts.

[0007] Among them, in a friction damping brake box, resistance is mainly generated by the relative movement of friction plates or friction pairs. Since braking is mainly achieved by the frictional force between friction plates, it is easy to cause high-temperature wear during friction braking, resulting in shortened service life of the friction plates and frequent maintenance requirements. Summary of the Invention

[0008] In order to solve the above technical problems, the present invention provides a damping brake box to solve the problems in the prior art that in a friction damping box, the friction plates are prone to wear, resulting in shortened service life, etc.

[0009] The damping brake box includes a key sleeve installed inside the box body. The key sleeve internally has a damping shaft connected movably. The damping shaft has a driving disk. One end of the damping shaft extending out of the box body has a threaded portion. An adjusting nut that cooperates with it is provided on the threaded portion. The damping shaft is provided with active friction plates that are spaced apart and connected to the key sleeve. A driven friction plate that moves synchronously with the damping shaft is provided between two adjacent active friction plates. The active friction plates and the driven friction plates are movably located on the damping shaft.

[0010] It further includes a pressure assembly. The pressure assembly is located on the damping shaft and on the side of the driving disk close to the driven friction plate. The pressure assembly makes the active friction plates and the driven friction plates approach each other.

[0011] Preferably, the cross-sectional profile of the damper shaft is hexagonal, and the hole in the driven friction plate sleeve on the damper shaft is also hexagonal. Bearings are symmetrically arranged near both ends inside the key sleeve, and flange covers are provided at both ends of the key sleeve. The flange covers are locked to the key sleeve by screws.

[0012] Preferably, hexagonal shaft sleeves are symmetrically arranged on the key sleeve in a sliding connection manner. The hexagonal shaft sleeves pass through the flange covers and enter the inside of the key sleeve. The vertical cross-sectional profile of the hexagonal shaft sleeves is stepped and they cooperate with the bearings. The adjusting nut is located on the side of the hexagonal shaft sleeve away from the flange cover. A fixing plate is provided on the side of the hexagonal shaft sleeve away from the flange cover. The fixing plate is connected to the hexagonal shaft sleeve by screws, and the adjusting nut passes through the fixing plate. A gap is reserved between the inner wall of the fixing plate and the outer wall of the adjusting nut.

[0013] Preferably, the active friction plate is made of a carbon fiber reinforced ceramic matrix composite material. Annularly distributed mating grooves are provided on the inner circular wall of the key sleeve. Annularly distributed mating parts are provided on the outer circular wall of the active friction plate, and the mating parts are inserted into the mating grooves. Ventilation holes I are provided on the left and right outer walls of the active friction plate in an inwardly concave annular distribution.

[0014] Preferably, the pressure assembly includes a disc spring and an equalizing pressure plate. The equalizing pressure plates are symmetrically and movably connected to the damper shaft. The active friction plate and the driven friction plate are between the two equalizing pressure plates. The disc spring is located between the driving disc and the equalizing pressure plate at the end away from the threaded part.

[0015] Preferably, the driven friction plate is composed of a wear-resistant plate and a heat-conducting plate. The wear-resistant plates are distributed on both sides of the heat-conducting plate. The wear-resistant plates are also made of a carbon fiber reinforced ceramic matrix composite material. The heat-conducting plate is made of a graphene-copper alloy composite material. The number of wear-resistant plates on one side of the heat-conducting plate is two and they are symmetrically distributed.

[0016] Preferably, the vertical cross-sectional profile of the two wear-resistant plates on the same side after combination is annular. A mating hole is provided inside the heat-conducting plate. The mating hole is a hexagonal hole and cooperates with the damper shaft. Shock-absorbing rubber rings fixedly connected to the heat-conducting plate are provided on both sides of the mating hole. Retaining rings are provided on both sides of the heat-conducting plate and near the outer ring wall. The wear-resistant plates are installed between the shock-absorbing rubber rings and the retaining rings, and the thickness of the wear-resistant plates is greater than the thickness of the shock-absorbing rubber rings and the retaining rings.

[0017] Preferably, positioning disks are provided on both sides of the heat conducting plate, the height of the positioning disks is less than the thickness of the wear-resistant plates, positioning holes are provided on the wear-resistant plates in a circular distribution, and the positions of the positioning holes are opposite to those of the positioning disks. Limiting card slots are symmetrically provided on the outer ring wall of the wear-resistant plates, a limiting card plate is provided outside the heat conducting plate, the vertical cross-sectional profile of the limiting card plate is a horizontally placed "concave" shape, and the "concave" openings of the two limiting card plates on both sides are opposite to each other.

[0018] Preferably, a locking ring is fixedly connected to the outer wall of the heat conducting plate. After the two wear-resistant plates on one side are assembled, the two vertical sections of the limiting card plate are inserted into the limiting card slots, and fastening screws are symmetrically provided on the limiting card plate in a threaded connection, and the fastening screws pass through the limiting card plate and are locked in the locking ring.

[0019] Preferably, retaining ring bands are symmetrically provided on the outer wall of the key sleeve, and gear rings are detachably connected to the opposite sides of the two retaining ring bands.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. In the present invention, a key sleeve is installed inside the box body. There is a damping shaft movably connected inside the key sleeve. The head of the damping shaft extends out of the key sleeve and has a threaded portion. Active friction plates and driven friction plates are arranged on the key sleeve at alternating intervals. When braking is required, the damping shaft is moved, so that the driving disk drives the pressure assembly to move towards the active friction plate and the driven friction plate, gradually reducing the gap between the two until they fit together. The active friction plate reduces the rotation speed of the driven friction plate through friction, and then realizes the braking of the key sleeve through the linkage relationship between the damping shaft and the key sleeve, achieving the braking effect;

[0022] Moreover, an adjusting nut is arranged on the threaded portion. By rotating the adjusting nut, the moving distance of the driving disk on the damping shaft can be controlled, thereby realizing the adjustment of the braking force. Different braking effects can be adjusted according to different situations, reducing the damage to the friction plates and improving the service life of the friction plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a schematic structural diagram of the external components of the overall key sleeve of the present invention;

[0024] Figure 2 is a cross-sectional view of the overall internal components of the key sleeve of the present invention;

[0025] Figure 3 is a schematic structural diagram of components such as the damping shaft and the driving disk of the present invention;

[0026] Figure 4 is a schematic exploded view of components such as the hexagonal shaft sleeve and the adjusting nut of the present invention;

[0027] Figure 5 Schematic diagram of the structure of a single active friction plate and a driven friction plate component of the present invention;

[0028] Figure 6 Schematic diagram of the structure inside the key sleeve and the active friction plate component of the present invention;

[0029] Figure 7 Schematic diagram of the disassembled structure of components such as the wear-resistant plate and the heat-conducting plate of the present invention;

[0030] Figure 8 Schematic diagram of the structure of components such as the heat-conducting plate and the limit clamping plate of the present invention.

[0031] In the figure:

[0032] 1. Key sleeve; 2. Damper shaft; 3. Driving disc; 4. Threaded part; 5. Adjusting nut; 6. Active friction plate; 6-1. Fitting part; 7. Driven friction plate; 7-1. Wear-resistant plate; 7-2. Heat-conducting plate; 8. Bearing; 9. Flange cover; 10. Hexagonal bushing; 11. Fixed disc; 12. Fitting card slot; 13. Vent hole 1; 14. Disc spring; 15. Equalizing pressure disc; 16. Vent hole 2; 17. Fitting hole; 18. Shock-absorbing rubber ring; 19. Retaining ring; 20. Positioning disc; 21. Positioning hole; 22. Limit card slot; 23. Limit clamping plate; 24. Locking ring; 25. Fastening screw; 26. Retaining disc band; 27. Gear ring. Specific embodiments

[0033] The following further describes in detail the embodiments of the present invention in conjunction with the drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0034] As shown in Figure 1 to Figure 8 shown:

[0035] Embodiment 1: The present invention provides a damping brake box, which includes a key sleeve 1 installed inside the box body. The key sleeve 1 is internally provided with a damping shaft 2 connected movably. The damping shaft 2 has a driving disc 3 thereon. One end of the damping shaft 2 extending out of the box body has a threaded part 4, and an adjusting nut 5 that cooperates with it is provided on the threaded part 4. The damping shaft 2 is provided with active friction plates 6 that are spaced apart and connected to the key sleeve 1. A driven friction plate 7 that moves synchronously with the damping shaft 2 is provided between two adjacent active friction plates 6. The active friction plate 6 and the driven friction plate 7 are movably located on the damping shaft 2;

[0036] It further includes a pressure assembly. The pressure assembly is located on the damping shaft 2 and on the side of the driving disc 3 close to the driven friction plate 7. The pressure assembly makes the active friction plate 6 and the driven friction plate 7 approach each other.

[0037] It should be noted that through the key sleeve 1 installed inside the box body, there is a damping shaft 2 movably connected inside the key sleeve 1. The head of the damping shaft 2 extends out of the key sleeve 1 and has a threaded part 4. Active friction plates 6 and driven friction plates 7 are arranged on the key sleeve 1 at alternating intervals. When braking is required, the damping shaft 2 is moved, so that the driving disk 3 drives the pressure assembly to move towards the active friction plate 6 and the driven friction plate 7, gradually reducing the gap between the two until they fit together. The active friction plate 6 reduces the rotational speed of the driven friction plate 7 through friction, and then realizes the braking of the key sleeve 1 through the linkage relationship between the damping shaft 2 and the key sleeve 1, achieving the braking effect;

[0038] Moreover, an adjusting nut 5 is arranged on the threaded part 4. By rotating the adjusting nut 5, the moving distance of the driving disk 3 on the damping shaft 2 can be controlled, thereby realizing the adjustment of the braking force. Different braking effects can be adjusted according to different situations, reducing the damage to the friction plates and increasing the service life of the friction plates.

[0039] In this embodiment, the cross-sectional profile of the damping shaft 2 is hexagonal, and the holes of the driven friction plate 7 sleeved on the damping shaft 2 are also hexagonal. Bearings 8 are symmetrically arranged near both ends inside the key sleeve 1. Flange covers 9 are arranged at both ends of the key sleeve 1, and the flange covers 9 are locked on the key sleeve 1 by screws.

[0040] It should be noted that through the arranged bearings 8, the outer rings of the bearings 8 are connected to the key sleeve 1, and the damping shaft 2 passes through the inner rings of the bearings 8. Thus, when the key sleeve 1 rotates, due to the connection of the bearings 8, the damping shaft 2 will not rotate together with the key sleeve 1, so that the key sleeve 1 can be better braked. The arranged flange covers 9 limit the positions of the bearings 8 to prevent them from coming out of the inside of the key sleeve 1.

[0041] In this embodiment, hexagonal shaft sleeves 10 are symmetrically arranged on the key sleeve 1 in a sliding connection manner. The hexagonal shaft sleeves 10 pass through the flange covers 9 and enter the inside of the key sleeve 1. The vertical cross-sectional profile of the hexagonal shaft sleeves 10 is step-shaped and passes through the bearings 8 to cooperate with them. The adjusting nut 5 is located on the side of the hexagonal shaft sleeve 10 away from the flange cover 9. A fixing disk 11 is arranged on the side of the hexagonal shaft sleeve 10 away from the flange cover 9. The fixing disk 11 is connected to the hexagonal shaft sleeve 10 by screws, and the adjusting nut 5 passes through the fixing disk 11. A gap is reserved between the inner wall of the fixing disk 11 and the outer wall of the adjusting nut 5.

[0042] It should be noted that if the rotation direction of the key sleeve 1 is counterclockwise, the adjusting nut 5 can be driven to rotate the damping shaft 2 in the clockwise direction, so as to provide a force opposite to the rotation direction during the braking process and further improve the braking effect.

[0043] The provided hexagonal bushing 10 rotates together with the damper shaft 2. The hexagonal bushing 10 cooperates with the inner ring of the bearing 8. At the same time, the number of hexagonal bushings 10 is two, so that the damper shaft 2 can be installed inside the key sleeve 1 to support the damper shaft 2. The fixing disk 11 can limit the adjusting nut 5 on the threaded part 4, and there is a gap between them, enabling the adjusting nut 5 to achieve displacement changes on the threaded part 4, and finally achieving braking through the pressure assembly.

[0044] In this embodiment, the active friction plate 6 is made of a carbon fiber reinforced ceramic matrix composite material. The inner circular wall of the key sleeve 1 is provided with annularly distributed mating grooves 12. The outer circular wall of the active friction plate 6 is provided with annularly distributed mating parts 6-1, and the mating parts 6-1 are inserted into the mating grooves 12. The left and right outer walls of the active friction plate 6 are provided with inwardly concave annularly distributed vent holes 13.

[0045] It should be noted that by designing the active friction plate 6 as a carbon fiber reinforced ceramic matrix composite material, it has the characteristics of high temperature resistance and stable friction coefficient. Since the active friction plate 6 and the driven friction plate 7 reduce the rotation speed through friction when they come into contact, friction generates heat, so designing it as a high temperature resistant material can reduce wear and improve the service life of the active friction plate 6 and the driven friction plate 7.

[0046] The inner circular wall of the key sleeve 1 is provided with mating grooves 12, and the mating parts 6-1 on the active friction plate 6 are inserted into the mating grooves 12. Thus, when the key sleeve 1 needs to be braked during rotation, by contacting the active friction plate 6 with the driven friction plate 7, after reducing the rotation speed of the active friction plate 6, the rotation speed of the key sleeve 1 can be controlled.

[0047] In this embodiment, the pressure assembly includes a disc spring 14 and an equalizing pressure plate 15. The equalizing pressure plates 15 are symmetrically and movably connected to the damper shaft 2. The active friction plate 6 and the driven friction plate 7 are between the two equalizing pressure plates 15, and the disc spring 14 is located between the driving disc 3 and the equalizing pressure plate 15 at the end away from the threaded part 4.

[0048] It should be noted that through the provided pressure assembly, when braking is required, the movement of the driving disc 3 will compress the disc spring 14, causing the disc spring 14 to exert a force on the equalizing pressure plate 15, thereby pushing the equalizing pressure plate 15 to move towards the active friction plate 6 and the driven friction plate 7. The equalizing pressure plate 15 moves axially on the damper shaft 2, so that its side wall is completely attached to the driven friction plate 7, reducing the situation of uneven force.

[0049] In this embodiment, the driven friction plate 7 is composed of a wear-resistant plate 7-1 and a heat-conducting plate 7-2. The wear-resistant plates 7-1 are distributed on both sides of the heat-conducting plate 7-2. The wear-resistant plates 7-1 are also made of carbon fiber reinforced ceramic-based composite materials. The heat-conducting plate 7-2 is made of graphene-copper alloy composite materials. There are two wear-resistant plates 7-1 on one side of the heat-conducting plate 7-2 and they are symmetrically distributed. The wear-resistant plate 7-1 is provided with an annularly distributed air vent 16 on the side close to the active friction plate 6.

[0050] It should be noted that by designing the heat conducting plate 7-2 to adopt a graphene-copper alloy composite material, when the wear-resistant plate 7-1 generates heat by friction, the heat can be transferred to the heat conducting plate 7-2, thereby quickly extracting the friction heat and reducing the risk of thermal decay.

[0051] A vent hole 13 is provided on the active friction plate 6, and a vent hole 2 16 is provided on the wear-resistant plate 7-1. During the contact and friction process between the two, the heat generated can also be discharged from the vent hole 13 and the vent hole 2 16, further improving the heat dissipation capacity and avoiding the situation where the active friction plate 6 and the driven friction plate 7 are overheated due to friction.

[0052] In this embodiment, the two wear-resistant plates 7-1 on the same side are formed into a ring-shaped vertical cross-sectional profile, and a matching hole 17 is provided inside the heat conducting plate 7-2. The matching hole 17 is a hexagonal hole and cooperates with the damper shaft 2. Shock-absorbing rubber rings 18 fixedly connected to the heat conducting plate 7-2 are provided on both sides of the matching hole 17. Snap rings 19 are provided on both sides of the heat conducting plate 7-2 and close to the outer ring wall. The wear-resistant plate 7-1 is installed between the shock-absorbing rubber ring 18 and the snap ring 19, and the thickness of the wear-resistant plate 7-1 is greater than the thickness of the shock-absorbing rubber ring 18 and the snap ring 19.

[0053] It should be noted that, through the setting of the matching hole 17, the matching hole 17 is hexagonal, and the damper shaft 2 will drive the driven friction plate 7 to rotate together during the rotation process. The shock-absorbing rubber ring 18 is set on the driven friction plate 7 to absorb high-frequency vibrations during the contact braking process with the active friction plate 6.

[0054] The position of the wear-resistant plate 7-1 can be limited by the cooperation between the retaining ring 19 and the shock-absorbing rubber ring 18. The thickness of the two is designed to be smaller than the thickness of the wear-resistant plate 7-1. Therefore, during the braking process, only the wear-resistant plate 7-1 and the active friction plate 6 will be squeezed out from each other without affecting other components.

[0055] In this embodiment, annular positioning plates 20 are provided on both sides of the heat conducting plate 7-2, the height of the positioning plates 20 is less than the thickness of the wear-resistant plate 7-1, annular positioning holes 21 are provided on the wear-resistant plate 7-1, and the positioning holes 21 are opposite to the positioning plates 20, and limiting grooves 22 are symmetrically provided on the outer ring wall of the wear-resistant plate 7-1. A limiting card plate 23 is provided on the outside of the heat conducting plate 7-2, and the vertical cross-sectional profile of the limiting card plate 23 is a horizontally placed "concave" shape, and the "concave" openings of the limiting card plates 23 on both sides are opposite.

[0056] It should be noted that the wear-resistant plate 7-1 on one side is designed to be divided into two parts, upper and lower. During long-term braking, if the wear-resistant plate 7-1 is worn and the friction force is reduced, the fastening screw 25 can be removed from the limit card plate 23, and the limit card plate 23 is pulled out from the limit card groove 22 in the wear-resistant plate 7-1. At this time, the wear-resistant plate 7-1 is moved outward to be separated from the positioning plate 20. Since the wear-resistant plate 7-1 is separated into upper and lower parts, it can be removed. When a large number of active friction plates 6 and driven friction plates 7 are placed together, one of the driven friction plates 7 can be replaced without disassembling the entire plate, thereby reducing maintenance time.

[0057] In this embodiment, a fixedly connected locking ring 24 is provided on the outer wall of the heat conducting plate 7-2. After the two wear-resistant plates 7-1 on one side are assembled, the two vertical sections of the limiting clamp 23 are inserted into the limiting clamp groove 22. The limiting clamp 23 is symmetrically provided with threaded fastening screws 25, and the fastening screws 25 pass through the limiting clamp 23 and are locked in the locking ring 24.

[0058] In this embodiment, baffle plates 26 are symmetrically arranged on the outer wall of the key sleeve 1 , and detachably connected gear rings 27 are arranged on opposite sides of the two baffle plates 26 .

[0059] It should be noted that the baffle belt 26 is fixedly connected to the key sleeve 1, and there are gear teeth on the outer ring wall of the ring gear 27. The ring gear 27 can cooperate with the external gear, so that by reducing the key sleeve 1, the rotation speed of the ring gear 27 can also be reduced, thereby braking the externally connected equipment.

[0060] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. Damping type brake box, characterized in that: Comprising: A key sleeve (1) installed inside a box body. Inside the key sleeve (1), there is a damping shaft (2) connected movably. A driving disc (3) is provided on the damping shaft (2). One end of the damping shaft (2) extending out of the box body has a threaded portion (4). An adjusting nut (5) that cooperates with it is provided on the threaded portion (4). Active friction plates (6) that are spaced apart and connected to the key sleeve (1) are provided on the damping shaft (2). A driven friction plate (7) that moves synchronously with the damping shaft (2) is provided between two adjacent active friction plates (6). The active friction plates (6) and the driven friction plates (7) are movably located on the damping shaft (2). It further includes a pressure assembly. The pressure assembly is located on the damping shaft (2) and on the side where the driving disc (3) is close to the driven friction plate (7). The pressure assembly makes the active friction plates (6) and the driven friction plates (7) approach each other.

2. The damping brake box according to claim 1, wherein: The cross-sectional profile of the damping shaft (2) is hexagonal. The hole in the driven friction plate (7) sleeved on the damping shaft (2) is also hexagonal. Bearings (8) are symmetrically provided at positions close to both ends inside the key sleeve (1). Flange covers (9) are provided at both ends of the key sleeve (1). The flange covers (9) are locked on the key sleeve (1) by screws.

3. The damping brake box according to claim 2, wherein: Hexagonal shaft sleeves (10) that are slidably connected are symmetrically provided on the key sleeve (1). The hexagonal shaft sleeves (10) pass through the flange covers (9) and enter the inside of the key sleeve (1). The vertical cross-sectional profile of the hexagonal shaft sleeves (10) is stepped and cooperates with the bearings (8) through them. The adjusting nut (5) is located on the side of the hexagonal shaft sleeves (10) away from the flange covers (9). A fixing disc (11) is provided on the side of the hexagonal shaft sleeves (10) away from the flange covers (9). The fixing disc (11) is connected to the hexagonal shaft sleeves (10) by screws, and the adjusting nut (5) passes through the fixing disc (11). A gap is reserved between the inner wall of the fixing disc (11) and the outer wall of the adjusting nut (5).

4. The damped brake box according to claim 1, wherein: The active friction plates (6) are made of a carbon fiber reinforced ceramic matrix composite material. Annularly distributed mating grooves (12) are provided on the inner circular wall of the key sleeve (1). Annularly distributed mating portions (6-1) are provided on the outer circular wall of the active friction plates (6), and the mating portions (6-1) are inserted into the mating grooves (12). Annularly distributed vent holes one (13) that are concave are provided on the left and right outer walls of the active friction plates (6).

5. The damped brake box according to claim 1, characterized in that: The pressure assembly includes a disc spring (14) and an equalizing pressure disc (15). The equalizing pressure discs (15) are symmetrically and movably connected to the damping shaft (2). The active friction plates (6) and the driven friction plates (7) are between the two equalizing pressure discs (15). The disc spring (14) is located between the driving disc (3) and the equalizing pressure disc (15) at the end away from the threaded portion (4).

6. The damping brake box according to claim 1, wherein: The driven friction plate (7) is composed of a wear-resistant plate (7-1) and a heat-conducting plate (7-2). The wear-resistant plates (7-1) are distributed on both sides of the heat-conducting plate (7-2). The wear-resistant plates (7-1) are also made of carbon fiber reinforced ceramic matrix composites. The heat-conducting plate (7-2) is made of graphene-copper alloy composite material. The number of wear-resistant plates (7-1) on one side of the heat-conducting plate (7-2) is two and they are symmetrically distributed. The wear-resistant plates (7-1) are provided with annularly distributed vent holes II (16) on the side close to the driving friction plate (6).

7. The damped brake box according to claim 6, characterized in that: The vertical cross-sectional profile of the two wear-resistant plates (7-1) on the same side after combination is annular. The heat-conducting plate (7-2) is internally provided with a mating hole (17). The mating hole (17) is a hexagonal hole and is in mutual cooperation with the damper shaft (2). Shock-absorbing rubber rings (18) fixedly connected to the heat-conducting plate (7-2) are provided on both sides of the mating hole (17). Retaining rings (19) are provided on both sides of the heat-conducting plate (7-2) and close to the outer ring wall. The wear-resistant plates (7-1) are installed between the shock-absorbing rubber rings (18) and the retaining rings (19), and the thickness of the wear-resistant plates (7-1) is greater than the thickness of the shock-absorbing rubber rings (18) and the retaining rings (19).

8. The damping brake box according to claim 7, characterized in that: Annularly distributed positioning discs (20) are provided on both sides of the heat-conducting plate (7-2). The height of the positioning discs (20) is less than the thickness of the wear-resistant plates (7-1). Annularly distributed positioning holes (21) are provided on the wear-resistant plates (7-1), and the positions of the positioning holes (21) are opposite to those of the positioning discs (20). Limiting card slots (22) are symmetrically provided on the outer ring wall of the wear-resistant plates (7-1). Limiting card plates (23) are provided on the outside of the heat-conducting plate (7-2). The vertical cross-sectional profile of the limiting card plates (23) is horizontally placed "concave", and the "concave" openings of the two limiting card plates (23) on both sides are opposite to each other.

9. The damping brake box according to claim 8, characterized in that: A locking ring (24) is fixedly connected to the outer wall of the heat-conducting plate (7-2). After the two wear-resistant plates (7-1) on one side are assembled, the two vertical sections of the limiting card plate (23) are inserted into the limiting card slots (22). Threaded fastening screws (25) are symmetrically provided on the limiting card plate (23), and the fastening screws (25) pass through the limiting card plate (23) and are locked in the locking ring (24).

10. The damping brake box according to claim 1, characterized in that: Disk belts (26) are symmetrically provided on the outer wall of the key sleeve (1). Gear rings (27) with detachable connections are provided on the opposite sides of the two disk belts (26).

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