Split friction type brake

Abstract

The utility model discloses a split friction type brake, and belongs to the technical field of industrial brakes. Comprising a pressing plate fixedly installed on equipment, a friction disc fixedly installed on one side of the pressing plate and connected to the outer side of an extending shaft of the equipment in a sleeving mode, and a friction plate fixedly arranged on the friction disc. The pushing disc is arranged on the side, away from the pressing plate, of the friction disc and moves in the axial direction of an equipment extending shaft, and the driving piece is arranged outside the pushing disc and the friction disc and used for enabling the pushing disc to move to be close to or away from the friction plate. And the screw is arranged on the driving piece and is used for connecting the push disc with the driving piece. According to the split friction type brake, split design is adopted, the structure is compact, the size is small, the split friction type brake is suitable for a narrow space, the maintenance difficulty and cost are reduced, the number of the friction plates is small, replacement is convenient after abrasion, meanwhile, the reset spring is pre-pressed through the screw, the brake is normally closed in the natural state, and the working condition requirement for keeping combination for a long time can be met.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of industrial brake, in particular to a split friction brake. BACKGROUND

[0002] Friction clutch is widely used in industrial transmission field, such as Figure 4 As shown in the figure, the traditional friction clutch includes hollow through shaft pipe 1', coupling disc 2', separation disc spring 3', driving pressure plate 4', piston 5', cylinder body 6', steel sheet 7' and friction plate 8' and other groups of components, and the friction plate 8' adopts a multi-group stacked type. When combined, the piston 5' pushes the driving pressure plate 4' to compress the multiple groups of steel sheets 7' and friction plates 8' after air supply by the pressure source, to realize torque transmission; when separated, the driving pressure plate 4' is pushed by the separation disc spring 3' to move in the direction away from the friction plate 8' along the axial direction after air cut-off, so that the steel sheet 7' and the friction plate 8' are reset and separated.

[0003] The traditional friction clutch has many components and complex structure, resulting in high processing cost, and the friction plate adopts a multi-group type, which needs to be replaced by professional manufacturers after wear, so the maintenance cost is high and inconvenient, in addition, the whole is designed in an integrated manner, which is not conducive to installation and maintenance, and the volume is large, so it cannot be used in narrow space, and the traditional friction clutch is in a normally open working mode, which is in a separated state in a natural state, and needs to be continuously supplied with air to maintain combination, which is difficult to meet the working condition that needs to be combined for a long time.

[0004] Therefore, the present application provides a split friction brake to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] The present application provides a split friction brake, which aims to solve the problems of the existing friction brake in the background art, such as many components, complex structure resulting in high processing cost, high maintenance cost and inconvenience of replacing the friction plate after wear, integrated design not conducive to installation and maintenance, large volume difficult to use in narrow space, and normally open working mode difficult to meet the working condition that needs to be combined for a long time.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a split friction brake, comprising a pressure plate fixedly installed on a device, a friction disc fixedly installed on one side of the pressure plate and sleeved on the outside of a device extension shaft, a friction plate fixedly arranged on the friction disc, a push disc arranged on the side of the friction disc away from the pressure plate and moving along the axial direction of the device extension shaft, and a driving member arranged outside the push disc and the friction disc for moving the push disc to approach or move away from the friction plate.

[0007] The split friction brake further comprises a screw arranged on the driving member for connecting the push disc and the driving member, and a reset spring arranged in the driving member and pre-pressed by the screw to press the push disc against the friction plate in a natural state; by designing the pressure plate, friction disc, push disc, driving member and other components as independent modules, the brake can be assembled and disassembled through the screw, realizing the split design of the brake, which not only makes the entire brake compact in structure and small in size, is suitable for installation in a narrow space, improves the space utilization and flexibility of the equipment, but also reduces the maintenance difficulty and cost as the brake adopts the split design, and when a component fails or needs to be replaced, the component can be individually disassembled and replaced without the need to disassemble the entire brake, when the friction plate wears out, the number of friction plates is small and the structure is simple, so the friction plate can be conveniently replaced, the time and cost for replacing the friction plate are reduced, and the operation efficiency and reliability of the equipment are improved.

[0008] Preferably, in order to facilitate the connection of the friction disc and the equipment extending shaft, a coupling hole is arranged on the friction disc, and the friction disc is fixedly sleeved on the equipment extending shaft through the coupling hole; the design of the coupling hole enables the friction disc to be directly sleeved on the equipment extending shaft and fixedly connected through the close fit of the shaft and the hole, which simplifies the connection process of the friction disc and the equipment extending shaft, improves the installation efficiency, and ensures the stability of the connection.

[0009] Preferably, in order to further facilitate the connection of the friction disc and the equipment extending shaft, the coupling hole is hexagonal or splined; the design of the coupling hole as hexagonal or splined provides a larger contact area and better torsional resistance to improve the connection strength, installation accuracy and transmission stability, and adapt to different torque working conditions.

[0010] Preferably, in order to realize the movement of the push disc, the driving member comprises a cylinder body arranged outside the push disc and the friction disc, a piston ring slidingly connected in the cylinder body for pushing the push disc to move, an air inlet hole opened on the cylinder body, and an air chamber arranged between the cylinder body and the piston ring and communicating with the air inlet hole, and the piston ring and the push disc are fixedly connected; by inflating the air chamber through the air inlet hole, the piston ring is pushed to slide in the cylinder body by the gas pressure, so that the push disc moves close to or away from the friction plate, and braking or releasing can be realized.

[0011] Preferably, in order to ensure sealing, a sealing ring is fixedly arranged between the outer wall of the piston ring and the inner wall of the cylinder body; the design of the sealing ring ensures the sealing between the cylinder body and the piston ring, preventing gas leakage and ensuring the stable operation of the brake.

[0012] Preferably, in order to ensure the movement of the push disc, the driving member further comprises at least four boss structures fixedly arranged on the outer wall of the push disc and groove structures opened in the cylinder body for guiding the sliding of the boss structures; the cooperation of the boss structures and the groove structures provides guidance for the movement of the push disc, ensuring the stability and accuracy of the push disc during movement and improving the engagement and disengagement precision of the brake.

[0013] Preferably, in order to realize the normally closed state of the brake, a spring mounting hole is arranged on the cylinder body, the return spring is pre-pressed in the spring mounting hole through the screw, and the end of the screw away from the spring mounting hole is screwed with the push disc; in this way, in the natural state, the elastic force of the return spring can push the push disc to move close to the friction plate on the friction disc, realizing the normally closed state of the brake, i.e., the brake is in the engaged state in the natural state, which is suitable for working conditions that require long-term engagement.

[0014] The split friction brake adopts a split design, with the pressing plate, friction disc, push disc, driving member and other components designed as independent modules and assembled through screws, which not only makes the structure compact and small in size, but also reduces the maintenance difficulty and cost.

[0015] The split friction brake has a small number of friction plates and a simple structure, and the replacement is convenient after wear;

[0016] The split friction brake pre-presses the return spring through the screw, and in the natural state, the return spring pushes the push disc to press the friction plate by using the elastic force, so that the brake presents a normally closed state, which is suitable for working conditions that require long-term engagement. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a sectional view of a split friction brake;

[0018] Figure 2 is a partial structure diagram of a driving member in a split friction brake;

[0019] Figure 3 is a structure diagram of a boss structure in a split friction brake;

[0020] Figure 4 is a sectional view of a traditional friction clutch.

[0021] In the drawings:

[0022] 1. Pressure plate;

[0023] 2. Friction disc; 21. Connecting hole;

[0024] 3. Friction plates;

[0025] 4. Pushing the plate;

[0026] 5. Drive component; 51. Cylinder body; 511. Spring mounting hole; 52. Air inlet; 53. Piston ring; 531. Sealing ring; 54. Air chamber; 55. Boss structure; 56. Groove structure;

[0027] 6. Screws;

[0028] 7. Return spring. Detailed Implementation

[0029] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0030] This embodiment provides a split friction brake, such as Figures 1-4 As shown, the split friction brake includes a pressure plate 1 fixedly installed on the equipment, a friction disc 2 fixedly installed on one side of the pressure plate 1 and sleeved on the outside of the equipment's extension shaft, a friction pad 3 fixedly installed on the friction disc 2, a push plate 4 installed on the side of the friction disc 2 away from the pressure plate 1 and moving axially along the equipment's extension shaft, and a drive member 5 installed outside the push plate 4 and the friction disc 2 for moving the push plate 4 closer to or away from the friction pad 3; the split friction brake also includes a screw 6 installed on the drive member 5 for connecting the push plate 4 and the drive member 5, and a return spring 7 installed inside the drive member 5 and preloaded by the screw 6 for pressing the push plate 4 against the friction pad 3 in a natural state.

[0031] When in use, under natural state, the push disc 4 is pushed and pressed on the friction plate 3 of the friction disc 2 due to the elastic force generated by the pre-pressing of the reset spring 7 through the screw 6, at this time, the brake is in the combined state, i.e. the normally closed state, and the rotation of the equipment extension shaft can be effectively limited by the friction force between the friction plate 3 and the push disc 4, which is suitable for the working condition that needs to keep braking for a long time. When the driving part 5 is aerated, the gas enters the inside of the driving part 5 to generate pressure to push the push disc 4 to move closer to the friction plate 3 and press the friction plate 3, so as to enhance the friction force between them and realize the combination of the brake, so that the brake is in the braking state. When the driving part 5 is de-aerated, the pressure in the inside of the driving part 5 disappears, at this time, the driving part 5 drives the push disc 4 to move away from the friction plate 3 against the elastic force of the reset spring 7, so as to realize the separation of the push disc 4 and the friction plate 3 and make the brake in the open state, so that the equipment extension shaft can rotate freely. Then, under the elastic force of the reset spring 7, the push disc 4 is pushed and pressed on the friction plate 3 again, so that the brake returns to the combined state and the rotation of the equipment extension shaft is limited again.

[0032] Specifically, the driving part 5 includes a cylinder body 51 arranged outside the push disc 4 and the friction disc 2, a piston ring 53 slidably connected in the cylinder body 51 for pushing the push disc 4 to move, an air inlet hole 52 arranged on the cylinder body 51, and an air chamber 54 arranged between the cylinder body 51 and the piston ring 53 and communicated with the air inlet hole 52, and the piston ring 53 and the push disc 4 are fixedly connected.

[0033] Under natural state, the push disc 4 is pressed on the friction plate 3 by the reset spring 7 pre-pressed through the screw 6, so that the brake is in the combined state. When the air is aerated from the air inlet hole 52 of the cylinder body 51, the gas enters the air chamber 54 communicated with the air inlet hole 52, the pressure in the air chamber 54 increases, the piston ring 53 slidably connected in the cylinder body 51 is driven to move towards the push disc 4, and the piston ring 53 drives the push disc 4 to move further close to the friction plate 3 in the process. In this process, the push disc 4 drives the screw 6 to compress the reset spring 7 towards the side close to the friction plate 3, and after the push disc 4 is pressed and combined with the friction plate 3, a strong friction force is generated to realize the braking function of the brake. When the air source is disconnected, the pressure in the air chamber 54 disappears, at this time, under the elastic force recovery of the reset spring 7, the push disc 4 moves away from the friction plate 3 and drives the piston ring 53 to reset, so as to realize the separation of the push disc 4 and the friction plate 3 and make the brake open. At this time, the movement of the push disc 4 drives the screw 6 to compress the reset spring 7 away from the friction plate 3, and after the push disc 4 stops moving, the reset spring 7 again drives the push disc 4 to move close to and press the friction plate 3 under the elastic force recovery, so that the brake returns to the combined state.

[0034] In order to ensure sealing, a sealing ring 531 is fixedly arranged between the outer wall of the piston ring 53 and the inner wall of the cylinder body 51; the design of the sealing ring 531 ensures the sealing between the cylinder body 51 and the piston ring 53, so as to prevent gas leakage and ensure the stable work of the brake.

[0035] Further, the driving member 5 further comprises at least four boss structures 55 fixedly arranged on the outer wall of the push disc 4 and a groove structure 56 opened in the cylinder body 51 for sliding guiding of the boss structures 55;

[0036] When the driving member 5 works, the piston ring 53 pushes the push disc 4 to move or reset the push disc 4, and the boss structures 55 on the outer wall of the push disc 4 slide along the groove structure 56 of the cylinder body 51; through the cooperation of the boss structures 55 and the groove structure 56, the movement of the push disc 4 can be guided, the accurate movement of the push disc 4 along the equipment extending shaft is ensured, and the rotation of the push disc 4 is limited, so that the combination and separation precision of the brake is improved.

[0037] Further, the cylinder body 51 is provided with a spring mounting hole 511, the reset spring 7 is pre-pressed in the spring mounting hole 511 through the screw 6, and the end of the screw 6 away from the spring mounting hole 511 is screwed with the push disc 4;

[0038] In the natural state, the screw 6 is screwed with the push disc 4, the reset spring 7 is pre-pressed in the spring mounting hole 511, the reset spring 7 is compressed to the side away from the friction plate 3, then under the elastic recovery of the reset spring 7, the elastic force can directly act on the push disc 4 and push the push disc 4 to compress the friction plate 3, so that the brake is in the combined state; when the brake is braked, the push disc 4 drives the screw 6 to compress the reset spring 7 in the spring mounting hole 511 to the side close to the friction plate 3, so as to provide elastic force when the air is cut off; when the air is cut off, the piston ring 53 and the push disc 4 move away from the friction plate 3 under the elastic recovery of the reset spring 7, with the movement of the push disc 4, the screw 6 is driven to compress the reset spring 7 in the spring mounting hole 511 to the side away from the friction plate 3, so as to separate the push disc 4 and the friction plate 3, so that the brake is opened, then the push disc 4 stops moving, the push disc 4 is driven to move close to and compress the friction plate 3 under the elastic recovery of the reset spring 7, so that the brake returns to the combined state.

[0039] In addition, in order to facilitate the connection of the friction disc 2 and the equipment extension shaft, the friction disc 2 is provided with a coupling hole 21, and the friction disc 2 is fixedly sleeved on the equipment extension shaft through the coupling hole 21; the coupling hole 21 is designed so that the friction disc 2 can be directly sleeved on the equipment extension shaft, and fixed connection is achieved through the close fit of the shaft and the hole. This design simplifies the connection process of the friction disc 2 and the equipment extension shaft, improves the installation efficiency, and at the same time ensures the stability of the connection.

[0040] It can be understood that, in order to further facilitate the connection of the friction disc 2 and the equipment extension shaft, the coupling hole 21 is hexagonal or splined; the coupling hole 21 is designed to be hexagonal or splined, which provides a larger contact area and better torsional performance to improve the connection strength, installation accuracy and transmission stability, and is suitable for different torque working conditions.

[0041] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes to the technical solution and concept of the present application within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A split-type friction brake, characterized in that: It includes a pressure plate (1) fixedly installed on the equipment, a friction disc (2) fixedly installed on one side of the pressure plate (1) and sleeved on the outside of the equipment extension shaft, a friction plate (3) fixedly disposed on the friction disc (2), a push plate (4) disposed on the side of the friction disc (2) away from the pressure plate (1) and moving axially along the equipment extension shaft, and a drive unit (5) disposed outside the push plate (4) and the friction disc (2) for moving the push plate (4) closer to or away from the friction plate (3); The split friction brake also includes a screw (6) disposed on the drive member (5) for connecting the push plate (4) and the drive member (5), and a return spring (7) disposed in the drive member (5) and preloaded by the screw (6) for pressing the push plate (4) against the friction plate (3) in the natural state.

2. The split friction brake according to claim 1, characterized in that: The friction disc (2) is provided with a connecting hole (21), and the friction disc (2) is fixedly sleeved on the extension shaft of the equipment through the connecting hole (21).

3. The split friction brake according to claim 2, characterized in that: The connecting hole (21) is hexagonal or splined.

4. The split friction brake according to claim 1, characterized in that: The drive unit (5) includes a cylinder body (51) disposed outside the push plate (4) and the friction plate (2), a piston ring (53) slidably connected inside the cylinder body (51) for pushing the push plate (4) to move, an air inlet (52) opened on the cylinder body (51), and an air chamber (54) disposed between the cylinder body (51) and the piston ring (53) and communicating with the air inlet (52). The piston ring (53) and the push plate (4) are fixedly connected.

5. The split friction brake according to claim 4, characterized in that: A sealing ring (531) is fixedly provided between the outer wall of the piston ring (53) and the inner wall of the cylinder body (51).

6. The split friction brake according to claim 4, characterized in that: The drive unit (5) also includes at least four boss structures (55) fixedly disposed on the outer wall of the push plate (4) and a groove structure (56) formed in the cylinder body (51) for sliding guidance of the boss structures (55).

7. The split friction brake according to claim 4, characterized in that: The cylinder body (51) is provided with a spring mounting hole (511). The return spring (7) is pre-pressed into the spring mounting hole (511) by the screw (6). The end of the screw (6) away from the spring mounting hole (511) is screwed to the push plate (4).

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