Parking brake

Abstract

The utility model relates to the field of speed reducer braking equipment, in particular to a parking brake which comprises a motor flange, a brake oil pressure unit, a disc type sleeve, a center shaft sleeve and other key assemblies through an elaborately-designed oil way structure. A unique closed oil way loop of the brake cavity, the communicating hole, the communicating groove, the oil passing channel and the brake cavity is constructed. By means of the design, effective circulating flow of lubricating oil in the braking process is achieved, the balance of the pressure of the inner space of the brake is remarkably improved, and therefore the braking effect of the brake is greatly improved. Besides, through a series of innovative measures such as additional arrangement of a buffer oil groove, optimization of a transition flange structure and ingenious arrangement of an oil overflow port and an exhaust valve connector, the overall performance of the brake is further enhanced, the risk of lubricating oil leakage is effectively reduced, and the stability and safety of the brake in the long-time operation process are ensured.

Description

Technical Field

[0001] This application relates to the field of speed reducer braking equipment, and particularly to a parking brake. Background Art

[0002] The parking brake of a speed reducer is a safety device used to keep the speed reducer stationary when it stops running, preventing accidental rotation due to gravity or external forces. It is usually installed on the output shaft of the speed reducer. When the speed reducer needs to stop and remain stationary, the parking brake prevents the rotation of the output shaft through friction or other braking forces. It plays an important role in ensuring the safe operation of the equipment and improving production efficiency.

[0003] Commonly used parking brakes usually adopt hydraulic control. When no hydraulic oil is injected into the brake, the spring inside the brake pushes the sliding block to press the brake pads, thus putting the speed reducer in a braking state; when hydraulic oil is injected into the hydraulic oil cavity through the oil injection port of the brake, the hydraulic oil pushes the sliding block back and releases the brake pads, and the speed reducer can operate;

[0004] And most brakes can be divided into dry brakes and wet brakes according to whether there is lubricating oil inside. For dry brakes, when the motor speed is high, the heat generated by the brake pads during braking is high, making the brake pads easy to sinter and stick together. The difference between wet brakes and dry brakes is that wet brakes have a complete lubrication structure, so that the brakes have better working performance.

[0005] However, for wet brakes, during braking at an instant, the sliding block will push the internal lubricating oil and compress the internal space, so a situation of unbalanced pressure will occur, affecting the braking effect of the brake. Summary of the Utility Model

[0006] This application provides a parking brake with better braking effect.

[0007] The parking brake provided by this application adopts the following technical solutions:

[0008] A parking brake includes a motor flange, a brake oil pressure unit, a disc sleeve and a central shaft sleeve; the motor flange, the brake oil pressure unit and the disc sleeve are all sleeved outside the central shaft sleeve and are coaxially fixedly connected in sequence;

[0009] The disc sleeve has a braking cavity inside, which is used to set the brake pads; an oil injection port communicating with the braking cavity is also opened on the side wall of the disc sleeve;

[0010] The brake oil pressure unit includes an annular cylinder block and an annular sliding block disposed inside the cylinder block. The circumferential side of the sliding block abuts against the inner wall of the cylinder block. An oil passage is provided between the inside of the sliding block and the central shaft sleeve, and the oil passage communicates with the braking cavity.

[0011] A communication hole is opened on the cylinder block. One end of the communication hole communicates with the braking cavity. A communication groove communicating with the other end of the communication hole is opened on the motor flange, and the communication groove communicates with the oil passage.

[0012] By adopting the above technical solution, through the arrangement of the communication hole and the communication groove, a complete loop of braking cavity - communication hole - communication groove - oil passage - braking cavity can be formed, so that a complete communication structure is formed in the internal space of the brake. Therefore, when the sliding block pushes the brake pad, the lubricating oil can flow in the loop, thereby improving the balance of the internal space pressure and further improving the braking effect of the brake.

[0013] Preferably, it further includes a connecting flange. The connecting flange is disposed at the end of the disc sleeve and fixedly connected thereto. A buffer oil groove is opened at one end of the connecting flange facing the disc sleeve, and the buffer oil groove communicates with the braking cavity.

[0014] By adopting the above technical solution, the arrangement of the buffer oil groove can increase the air compression space inside the brake, reduce the internal pressure generated during compression, thereby reducing the risk of lubricating oil leakage and improving the working performance of the brake.

[0015] Preferably, the buffer oil groove is annular and arranged around the center of the connecting flange.

[0016] By adopting the above technical solution, the buffer groove can provide a large enough space and can match the shape of the braking cavity, thereby reducing the internal pressure when the brake works.

[0017] Preferably, a transition flange is provided between the connecting flange and the disc sleeve. An oil passage groove is opened on the transition flange, and the braking cavity communicates with the buffer oil groove through the oil passage groove.

[0018] By adopting the above technical solution, the braking cavity and the buffer oil groove are isolated by the transition flange, and the two are communicated by arranging the oil passage groove, so as to guide the flow of the lubricating oil and relieve the imbalance of the internal pressure.

[0019] Preferably, an oil overflow port communicating with the braking cavity is further opened on the side wall of the disc sleeve. An oil overflow valve is provided at the oil overflow port. The oil injection port and the oil overflow port are respectively located on both sides in the diameter direction of the disc sleeve.

[0020] By adopting the above technical solutions, the setting of the oil overflow port can ensure that the lubricating oil can be fully filled in the braking cavity, and the selection of the positions of the oil injection port and the oil overflow port facilitates the injection of the lubricating oil.

[0021] Preferably, the communication hole communicates with the oil overflow port, and the communication hole communicates with the braking cavity through the oil overflow port.

[0022] By adopting the above technical solutions, the communication hole is connected with the oil overflow port to realize the connection between the communication hole and the braking cavity, which can simplify the internal oil circuit of the brake and ensure the high efficiency of the lubricating oil flow.

[0023] Preferably, an exhaust valve interface is provided on the motor flange for connecting an exhaust valve, and the exhaust valve interface communicates with the communication groove.

[0024] By adopting the above technical solutions, by providing the exhaust valve interface, it is convenient to discharge the air inside the brake. At the same time, by connecting the exhaust valve interface with the communication groove, the internal structure of the brake can be simplified and the processing cost can be reduced.

[0025] Preferably, a plurality of the communication holes are provided and are arranged around the cylinder block, and a plurality of the communication grooves are correspondingly provided for the communication holes.

[0026] By adopting the above technical solutions, the setting of a plurality of communication holes can improve the uniformity of the lubricating oil flow and facilitate the improvement of the balance of the internal pressure of the brake.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] 1. Since the present application adopts a specific oil circuit design, including the precise layout of components such as the motor flange, the brake oil pressure unit, and the disc sleeve, a complete oil circuit loop is formed, so that the effective flow of the lubricating oil is realized during the braking process, and the braking effect of the brake and the balance of the internal pressure are significantly improved;

[0029] 2. In the present application, structures such as a buffer oil tank and a transition flange are preferably adopted. By increasing the internal air compression space and guiding the flow of the lubricating oil, the risk of lubricating oil leakage is further reduced, and the working performance of the brake is improved. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of the parking brake in the embodiment of the present application;

[0031] Figure 2 is a cross-sectional view of the parking brake in the embodiment of the present application, used to show the internal structure of the brake.

[0032] Reference numerals in the drawings: 1, motor flange; 11, communication groove; 12, exhaust valve interface; 2, brake oil pressure unit; 21, cylinder block; 211, communication hole; 22, sliding block; 23, oil passage; 3, disc sleeve; 31, braking cavity; 32, brake pad; 33, oil injection port; 34, oil overflow port; 35, oil overflow valve; 4, central shaft sleeve; 5, connecting flange; 51, buffer oil groove; 6, transition flange. Detailed implementation mode

[0033] The following further elaborates on this application in conjunction with the attached Figure 1-2 drawings.

[0034] This embodiment discloses a wet parking brake, which mainly consists of a motor flange 1, a brake oil pressure unit 2, a disc sleeve 3, and a central shaft sleeve 4. These components are all sleeved outside the central shaft sleeve 4 and are coaxially fixedly connected in sequence to form a stable overall structure. The disc sleeve 3 has a braking cavity 31 inside for setting the brake pad 32. At the same time, an oil injection port 33 communicating with the braking cavity 31 is provided on the side wall of the disc sleeve 3 to facilitate the injection of lubricating oil. The brake oil pressure unit 2 includes an annular cylinder block 21 and an annular sliding block 22 arranged inside the cylinder block 21. The periphery of the sliding block 22 is in close contact with the inner wall of the cylinder block 21. An oil passage 23 is provided between the inside of the sliding block 22 and the central shaft sleeve 4, and this oil passage 23 communicates with the braking cavity 31 to form a part of the oil circuit. A communication hole 211 is also provided on the cylinder block 21. One end of the communication hole 211 communicates with the braking cavity 31, and the other end communicates with the communication groove 11 provided on the motor flange 1. The communication groove 11 further communicates with the oil passage 23, thereby forming a complete oil circuit loop of braking cavity 31 - communication hole 211 - communication groove 11 - oil passage 23 - braking cavity 31. During braking, the lubricating oil can effectively flow in this loop, thereby improving the balance of the internal space pressure and further enhancing the braking effect of the brake.

[0035] When the brake needs to be braked, the sliding block 22 moves under hydraulic pressure and presses the brake pad 32 tightly. At this time, due to the design of the oil circuit loop, the lubricating oil can effectively flow between the braking cavity 31, the communication hole 211, the communication groove 11, and the oil passage 23, thereby maintaining the balance of the internal space pressure. This balanced state helps to ensure the uniform pressure on the brake pad 32, thereby improving the braking effect. At the same time, the flow of the lubricating oil can also play a role in cooling and lubrication, extending the service life of the brake.

[0036] The wet parking brake further includes a connecting flange 5. The connecting flange 5 is arranged at the end of the disc sleeve 3 and fixedly connected thereto. One end of the connecting flange 5 facing the disc sleeve 3 is provided with a buffer oil groove 51, and the buffer oil groove 51 communicates with the braking cavity 31. This design can increase the air compression space inside the brake, thereby reducing the change of internal pressure during braking and reducing the risk of lubricating oil leakage.

[0037] During braking, when the slider 22 pushes the lubricating oil, part of the lubricating oil will flow into the buffer oil groove 51. Since the buffer oil groove 51 provides additional space, it can absorb part of the pressure fluctuation and maintain the stability of the internal pressure. This stable state helps to prevent the lubricating oil from leaking due to excessive pressure, thus ensuring the normal operation of the brake.

[0038] This embodiment further optimizes the design of the buffer oil groove 51. Specifically, the buffer oil groove 51 is annular and arranged around the center of the connecting flange 5. This layout can match the shape of the braking cavity 31, provide a larger space to accommodate the lubricating oil, and further reduce the internal pressure during the operation of the brake.

[0039] Due to the adoption of the annular buffer oil groove 51, the pressure distribution is more uniform and the ability to absorb pressure fluctuations is stronger, thereby further improving the performance stability of the brake.

[0040] Furthermore, the embodiment of the present application also adopts a transition flange 6. Specifically, the transition flange 6 is arranged between the connecting flange 5 and the disc sleeve 3, and an oil passage groove is provided thereon. The braking cavity 31 communicates with the buffer oil groove 51 through the oil passage groove, realizing effective communication between the two. The introduction of the transition flange 6 can isolate the braking cavity 31 and the buffer oil groove 51, and at the same time guide the flow of the lubricating oil, thereby more effectively alleviating the situation of internal pressure imbalance.

[0041] During braking, the lubricating oil can not only flow in the braking cavity 31, but also enter the buffer oil groove 51 through the oil passage groove. This design makes the flow of the lubricating oil more orderly and can better balance the internal pressure. At the same time, the isolation effect of the transition flange 6 also helps to keep the braking cavity 31 and the buffer oil groove 51 clean and extend the service life of the brake.

[0042] The present application further improves the disc sleeve 3. Specifically, an oil overflow port 34 communicating with the braking cavity 31 is added to the side wall of the disc sleeve 3. An oil overflow valve 35 is arranged at the oil overflow port 34 for controlling the injection amount of the lubricating oil. The oil injection port 33 and the oil overflow port 34 are respectively located on both sides of the diameter direction of the disc sleeve 3, and this layout is convenient for the injection and overflow of the lubricating oil.

[0043] When lubricating oil is injected into the braking cavity 31 through the oil filling port 33, the excess lubricating oil will flow out through the oil overflow port 34. This design can ensure that an appropriate amount of lubricating oil is always maintained in the braking cavity 31, which will neither affect the braking effect due to excessive lubricating oil nor cause increased wear due to insufficient lubricating oil. At the same time, the setting of the oil overflow valve 35 can also precisely control the injection amount of the lubricating oil, further improving the reliability of the brake during use.

[0044] The above is a preferred embodiment of the present application, and the protection scope of the present application is not limited thereby. Any equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application. For example, the number, shape, and layout of the communication holes 211 and the communication grooves 11 can be adjusted according to actual needs; the setting position and connection method of the exhaust valve interface 12 can also be optimized according to specific circumstances. These equivalent changes shall be regarded as being included within the protection scope of the present application.

Claims

1. A parking brake, characterized in that: It comprises a motor flange (1), a brake oil pressure unit (2), a disc sleeve (3) and a central shaft sleeve (4); the motor flange (1), the brake oil pressure unit (2) and the disc sleeve (3) are all sleeved on the outside of the central shaft sleeve (4) and are coaxially fixedly connected in sequence; The disc sleeve (3) has a brake cavity (31) inside, in which a brake pad (32) is arranged; an oil filling port (33) communicating with the brake cavity (31) is also provided on the side wall of the disc sleeve (3); The brake oil pressure unit (2) comprises an annular cylinder (21) and an annular sliding block (22) arranged inside the cylinder (21), the peripheral side of the sliding block (22) abutting against the inner wall of the cylinder (21); an oil passage (23) is arranged between the inside of the sliding block (22) and the central shaft sleeve (4), and the oil passage (23) is communicated with the brake cavity (31); The cylinder body (21) is provided with a communication hole (211), one end of which is in communication with the brake cavity (31), and the motor flange (1) is provided with a communication groove (11) in communication with the other end of the communication hole (211), and the communication groove (11) is in communication with the oil passage (23).

2. The parking brake according to claim 1, characterized in that: It also comprises a connecting flange (5), which is arranged at the end of the disc sleeve (3) and fixedly connected thereto; a buffer oil groove (51) is formed at one end of the connecting flange (5) facing the disc sleeve (3), and the buffer oil groove (51) is communicated with the brake cavity (31).

3. The parking brake according to claim 2, characterized in that: The buffer oil groove (51) is annular and is arranged around the center of the connecting flange (5).

4. The parking brake according to claim 2, characterized in that: A transition flange (6) is provided between the connecting flange (5) and the disc sleeve (3), an oil groove is provided on the transition flange (6), and the brake cavity (31) is communicated with the buffer oil groove (51) through the oil groove.

5. The parking brake according to claim 1, characterized in that: An oil overflow port (34) communicating with the brake cavity (31) is also provided on the side wall of the disc sleeve (3), and an oil overflow valve (35) is provided at the oil overflow port (34); the oil filling port (33) and the oil overflow port (34) are respectively located on both sides of the disc sleeve (3) in the diameter direction.

6. The parking brake according to claim 5, characterized in that: The communicating hole (211) is in communication with the oil overflow port (34), and the communicating hole (211) is in communication with the brake cavity (31) through the oil overflow port (34).

7. The parking brake according to claim 1, characterized in that: An exhaust valve interface (12) is provided on the motor flange (1) for connecting an exhaust valve, and the exhaust valve interface (12) is in communication with the communication groove (11).

8. The parking brake according to claim 1, characterized in that: The communicating holes (211) are provided in plurality and are arranged around the cylinder body (21), and the communicating grooves (11) are provided in plurality corresponding to the communicating holes (211).

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