Brake for mine truck wheel edge

Abstract

The invention relates to a mine truck wheel edge brake and belongs to the field of automobile brakes, the mine truck wheel edge brake comprises a fixed base, a driving piston and a friction plate, an oil pressure cavity and a driving groove are formed in the fixed base, the driving piston is located in the driving groove in a sliding mode, and the oil pressure cavity communicates with the groove bottom of the driving groove; the friction plate is located on the side, facing the brake disc, of the driving piston, sealing rings are arranged between the driving piston and the groove wall of the driving groove, a plurality of embedded annular grooves are formed in the groove wall of the driving groove, the sealing rings are embedded in the embedded annular grooves, each sealing ring comprises an elastic ring and a supporting ring, and the supporting rings are arranged on the elastic rings. The elastic ring is made of rubber, and the supporting ring is made of polytetrafluoroethylene. The sealing performance between the driving piston in the driving groove and the groove wall of the driving groove is improved, and operation and movement of the driving piston are more stable.

Description

Technical Field

[0001] The present application relates to the field of automobile brakes, and in particular to a wheel brake for a mining truck. Background Art

[0002] The brake is a device that has the function of slowing down, stopping or keeping the moving parts (or moving machinery) stopped. It is a mechanical part that stops or slows down the moving parts in the machinery. It is commonly known as brakes or gates. The brake is mainly composed of a frame, brake parts and operating devices.

[0003] In the related art, the disc brake used on the wheel side of a mining truck includes a fixed base, a hydraulic control system, a driving piston and a friction plate. The fixed base is mounted on the vehicle chassis, the friction plate is slidably disposed on the fixed base and is located next to the wheel brake disc, the driving piston is also slidably disposed on the fixed base, and the hydraulic control system is used to drive the driving piston to move, and the moving direction is parallel to the axis of the wheel. When the friction plate moves to abut against the brake disc, the friction force generated by the two acts as the rotational resistance of the wheel, thereby achieving the braking purpose.

[0004] An oil pressure chamber and a driving groove for sliding of the driving piston are provided on the fixed base. The oil pressure chamber and the driving groove are connected to each other. There is a small gap between the side wall of the driving piston and the groove wall of the driving groove. A sealing ring and a wear-resistant ring are embedded on the groove wall of the driving groove. Both are coaxial with the driving piston and abut against the side wall of the driving piston. The sealing ring is used to improve the sealing performance of the space on one side of the oil pressure chamber. The wear-resistant ring is also called a guide ring, which is used to improve the stability of the driving piston during movement.

[0005] It can be seen from the above structural features that there is only one sealing ring used to seal the oil pressure chamber, and the sealing effect is limited and the fault tolerance is low. Summary of the invention

[0006] In order to improve the above problems, the present application provides a brake for the wheel side of a mining truck.

[0007] The invention provides a mining truck wheel brake which adopts the following technical solution: A brake for the wheel side of a mining truck comprises a fixed base, a driving piston and a friction plate. The fixed base is provided with an oil pressure chamber and a driving groove. The driving piston is slidably arranged in the driving groove. The oil pressure chamber is connected to the bottom of the driving groove. The friction plate is located on the side of the driving piston facing the brake disc. A sealing ring is provided between the driving piston and the groove wall of the driving groove. A plurality of embedded annular grooves are provided on the groove wall of the driving groove. The sealing ring is provided with a plurality of embedded annular grooves for the sealing ring to be embedded. The sealing ring comprises an elastic ring and a supporting ring. The elastic ring is made of rubber and the supporting ring is made of polytetrafluoroethylene.

[0008] By adopting the above technical solution, the provision of multiple sealing rings improves the sealing effect and fault tolerance. At the same time, some of the sealing rings are made of polytetrafluoroethylene with relatively high hardness, which also has a certain stabilizing guiding effect on the sliding of the driving piston.

[0009] Preferably, a protective ring is further provided in the embedded ring groove in which the elastic ring is placed. The protective ring is coaxial with the elastic ring and is located on a side of the elastic ring close to the friction plate.

[0010] By adopting the above technical solution, when the driving piston moves rapidly toward the structural groove, its side wall exerts a certain pushing and squeezing force on the elastic ring. The protective ring is located on one side of the elastic ring to abut and protect the elastic ring, thereby reducing the structural damage of the groove wall of the embedded ring groove to the elastic ring.

[0011] Preferably, a connecting magnetic block is fixedly connected to a side of the driving piston facing the friction plate, and a magnetic metal block is fixedly provided to a side of the friction plate facing the driving piston.

[0012] By adopting the above technical solution, the connection and fixation of the end of the piston and the friction plate are achieved during the movement of the driving piston, and the two move synchronously.

[0013] Preferably, a dustproof isolation ring gasket is connected between the driving piston and the fixed base, the dustproof isolation ring gasket is coaxial with the driving piston, a sealing arch surface is formed on the side of the dustproof isolation ring gasket facing the friction plate, and the sealing arch surface abuts against the friction plate.

[0014] By adopting the above technical solution, the dustproof isolation ring gasket closes the slot gap of the driving slot. During the reciprocating movement of the driving piston, the dustproof isolation ring gasket reduces the probability of dust entering the driving slot.

[0015] Preferably, an auxiliary rubber ring is further provided in the embedded ring groove of the support ring, the auxiliary rubber ring is coaxial with the support ring, and the auxiliary rubber ring is located on the side of the support ring facing the oil pressure chamber. The support ring includes a plurality of unit blocks, and the unit blocks are movably connected to the fixed base. A control component is provided in the fixed base, and the control component is used to control the movement of each unit block. The movement direction of the unit block is close to or away from the driving piston.

[0016] Preferably, a plurality of the unit blocks are arranged in a circumferential array around the driving piston, the unit blocks are slidably connected to a fixed base, the sliding direction is the radial direction of the driving piston, and the control assembly is used to make the unit blocks approach and abut the driving piston when the driving piston moves relative to the fixed base.

[0017] By adopting the above technical solution, when the unit block is not in contact with the driving piston, there is no interaction force between the two; after the control component makes each unit block move close to the driving piston, the unit block and the driving piston are in contact, and the unit block can play a supporting and guiding role for the sliding driving piston.

[0018] Preferably, the control component includes a propulsion wave ring, which is rotatably connected to the fixed base, and the propulsion wave ring is coaxially sleeved outside the support ring. A plurality of propulsion protrusions are formed on the inner edge of the propulsion wave ring, and the propulsion protrusions abut against the side of the unit block away from the driving piston.

[0019] By adopting the above technical solution, when the propulsion wave ring rotates, the propulsion protrusion generates a moving propulsion force on the unit block, thereby realizing the function of the unit block.

[0020] Preferably, the control component includes a sensing valve plate, a control gear, a control rack and a reversing gear set. The sensing valve plate is located in the oil pressure chamber and is rotatably connected to a fixed base. The control gear is coaxially fixedly connected to the rotating shaft of the sensing valve plate. The control rack is slidably connected to the fixed base. The reversing gear set is located on the fixed base. The control rack transmits torque to the propulsion wave ring through the reversing gear set.

[0021] Preferably, the control component also includes an initial position spring, one end of which is connected to a fixed base, and the other end is connected to a sensing valve plate. When the oil pressure in the oil pressure chamber remains stable, the sensing valve plate blocks the passage in the oil pressure chamber.

[0022] By adopting the above technical solution, when the oil pressure in the oil pressure chamber changes and the oil flows, the sensing valve plate is pushed to flip, and finally under the action of the gear pair, the wave ring is driven to rotate, and the protrusion is driven to generate abutment force on the unit block, and each unit block moves synchronously close to the driving piston.

[0023] Preferably, the auxiliary rubber ring is provided with a plurality of transition grooves on one side facing the unit blocks, the number of the transition grooves is consistent with the number of the unit blocks, the length direction of the transition grooves is the radial direction of the driving piston, and a single transition groove is located between two adjacent unit blocks.

[0024] By adopting the above technical solution, when each unit block moves synchronously toward the driving piston, the gap between each two adjacent unit blocks gradually decreases. The setting of the transition groove is intended to reduce the squeezing of the unit block on the auxiliary rubber ring, thereby reducing the obstruction of the auxiliary rubber ring to the movement of the unit block.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The sealing effect and fault tolerance are improved by setting multiple sealing rings. At the same time, some of the sealing rings are made of polytetrafluoroethylene with higher hardness, which also has a certain stable guiding effect on the sliding of the driving piston; 2. The support ring includes multiple unit blocks, auxiliary rubber rings, and a control component. When the driving piston remains stationary, each unit block is relatively far away from the driving piston and does not contact the driving piston. The auxiliary rubber ring seals the space here. When the oil pressure in the oil pressure chamber changes and the driving piston moves, the control component controls all the unit blocks to approach the driving piston and abut against its side wall, thereby supporting and guiding its movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the wheel brake of a mining truck in the first embodiment of the present application.

[0027] Figure 2 yes Figure 1 A partial enlarged view of part A in the middle.

[0028] Figure 3 It is a schematic diagram of the matching structure of the wave ring and the unit block in the second embodiment of the present application.

[0029] Figure 4 It is a structural cross-sectional schematic diagram used to illustrate the operating principle of the control component in Example 2 of the present application.

[0030] Explanation of the reference numerals in the accompanying drawings: 1. Fixed base; 11. Structural groove; 12. Oil pressure chamber; 13. Driving groove; 131. Embedded ring groove; 2. Sealing ring; 21. Elastic ring; 22. Protective ring; 23. Support ring; 231. Unit block; 24. Auxiliary rubber ring; 241. Transition groove; 3. Driving piston; 31. Connecting magnetic block; 32. Dustproof isolation ring gasket; 321. Sealing arch surface; 4. Friction plate; 41. Magnetic metal block; 5. Control assembly; 51. Propelling wave ring; 511. Propelling protrusion; 52. Induction valve plate; 521. Initial spring; 53. Control gear; 54. Control rack; 55. Reversing gear set. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] Embodiment 1: The present application embodiment discloses a brake for a mining truck wheel side, such as Figure 1 and 2As shown, the fixed base 1 includes a fixed base 1, a driving piston 3 and a friction plate 4. The fixed base 1 is fixed to the chassis of the vehicle by bolt connection. The fixed base 1 is provided with an oil pressure chamber 12 and a driving groove 13. The groove bottoms of the oil pressure chamber 12 and the driving groove 13 are connected. The driving piston 3 is slidably arranged in the driving groove 13. A structural groove 11 is formed on the fixed base 1. The brake disc of the wheel is located in the structural groove 11. The notch of the driving groove 13 is located on the groove wall of the structural groove 11. The friction plate 4 is located at the notch of the driving groove 13. In this embodiment, the number of the driving grooves 13 is six, the number of the friction plates 4 is two, and the brake disc of the wheel is located between the two friction plates 4. The number of the driving grooves 13 on the single side groove wall of the structural groove 11 is three. Every three driving grooves 13 are connected to one oil pressure chamber 12. A single driving groove 13 corresponds to one driving piston 3, that is, three driving pistons 3 correspond to one friction plate 4.

[0033] like Figure 1 and 2 As shown, the oil pressure chambers 12 on both sides of the structural groove 11 are connected through the oil supply pipeline, so as to realize the synchronous movement control of all the driving pistons 3. The cross-sections of the driving piston 3 and the driving groove 13 are both circular, and two embedded ring grooves 131 are provided on the groove wall of the driving groove 13. A sealing ring 2 is embedded between the driving piston 3 and the groove wall of the driving groove 13 through the embedded ring groove 131. The sealing ring 2 includes an elastic ring 21, a support ring 23 and an auxiliary rubber ring 24. The elastic ring 21 is made of rubber and is located in the embedded ring groove 131 relatively close to the notch of the driving groove 13. A protective ring 22 is also provided in the embedded ring groove 131; the inner edge of the elastic ring 21 abuts against the side wall of the driving piston 3, and the outer edge abuts against the groove bottom of the embedded ring groove 131. The material of the protection ring 22 is polytetrafluoroethylene. The protection ring 22 and the elastic ring 21 are coaxial. The protection ring 22 is located on the side of the elastic ring 21 close to the friction plate 4. When the driving piston 3 moves rapidly toward the structural groove 11, its side wall has a certain pushing and squeezing force on the elastic ring 21. The protection ring 22 is located on one side of the elastic ring 21 to abut and protect the elastic ring 21, thereby reducing the structural damage of the groove wall of the embedded annular groove 131 to the elastic ring 21.

[0034] like Figure 1 and 2As shown, the support ring 23 is located in the embedded ring groove 131 relatively far from the notch of the driving groove 13, and an auxiliary rubber ring 24 is also arranged in the embedded ring groove 131. The material of the support ring 23 is polytetrafluoroethylene. In this embodiment, the auxiliary rubber ring 24 is coaxial with the support ring 23 and is located outside the support ring 23. The outer edge of the auxiliary rubber ring 24 abuts against the bottom of the embedded ring groove 131, and the inner edge of the support ring 23 abuts against the side wall of the driving piston 3. The auxiliary rubber ring 24 always applies a clamping force to the support ring 23, thereby improving the clamping effect of the support ring 23 on the driving piston 3, that is, improving the sealing effect of the abutment between the support ring 23 and the driving piston 3. Due to the high hardness of the support ring 23, when the driving piston 3 moves, the support ring 23 also has a certain stable guiding effect on the sliding of the driving piston 3.

[0035] like Figure 1 and 2 As shown, a connecting magnetic block 31 is fixedly connected to the side of the driving piston 3 facing the friction plate 4, and a magnetic metal block 41 is fixedly arranged on the side of the friction plate 4 facing the driving piston 3. In this embodiment, the material of the magnetic metal block 41 is iron, so that the end of the driving piston 3 and the friction plate 4 are connected and fixed during the movement of the driving piston 3, and the two move synchronously. A dustproof isolation ring gasket 32 ​​is connected between the driving piston 3 and the fixed base 1 through a snap connection. The dustproof isolation ring gasket 32 ​​is coaxial with the driving piston 3. A sealing arch surface 321 is formed on the side of the dustproof isolation ring gasket 32 ​​facing the friction plate 4, and the sealing arch surface 321 abuts against the friction plate 4; during the reciprocating movement of the driving piston 3, the dustproof isolation ring gasket 32 ​​reduces the probability of dust entering the driving groove 13.

[0036] Embodiment 2: like Figure 3 and 4 As shown, the auxiliary rubber ring 24 in this embodiment is located on the side of the support ring 23 facing the oil pressure chamber 12, that is, the auxiliary rubber ring 24 and the support ring 23 are arranged along the axial direction of the driving groove 13, and the inner edge of the auxiliary rubber ring 24 is tightly abutted against the side wall of the driving piston 3, which can play a sealing effect. The support ring 23 includes a plurality of unit blocks 231, and the plurality of unit blocks 231 are arranged in a circumferential array along the embedded ring groove 131. The unit blocks 231 are movably connected to the fixed base 1. The fixed base 1 is provided with a control component 5, and the control component 5 is used to control the movement of each unit block 231. The movement direction of the unit block 231 is to approach or move away from the driving piston 3. The movement of the unit block 231 can change whether it abuts against the driving piston 3.

[0037] like Figure 3 and 4As shown, in this embodiment, the unit block 231 is slidably connected with the fixed base 1, and the sliding direction is the radial direction of the driving piston 3, and there is a gap between each two adjacent unit blocks 231. The control assembly 5 includes a propulsion wave ring 51, a sensing valve plate 52, a control gear 53, a control rack 54, a reversing gear set 55 and an initial position spring 521. The propulsion wave ring 51 is located at the bottom of the embedded ring groove 131 and is rotatably connected with the fixed base 1, and the rotation axis coincides with the axis of the driving groove 13. The propulsion wave ring 51 is coaxially sleeved outside the support ring 23, and the inner edge of the propulsion wave ring 51 is formed with a plurality of propulsion protrusions 511, and the contour of the propulsion protrusion 511 is arc-shaped, that is, the inner edge contour of the propulsion wave ring 51 is wavy. When the propulsion wave ring 51 rotates, the propulsion protrusion 511 abuts against the side of the unit block 231 away from the driving piston 3 and applies abutting force thereto, thereby generating a thrust on the unit block 231 and causing it to move closer to the driving piston 3. There is a gap between every two adjacent unit blocks 231 , and the number of the unit blocks 231 is consistent with the number of the pushing protrusions 511 .

[0038] like Figure 3 and 4 As shown, the sensing valve plate 52 is rotatably connected to the fixed base 1, the control gear 53 is coaxially fixedly connected to the rotating shaft of the sensing valve plate 52, and the control rack 54 is slidably connected to the fixed base 1, and the sliding direction is parallel to the moving direction of the driving piston 3. The outer edge of the propulsion wave ring 51 is formed with a sawtooth structure, and the reversing gear set 55 is located on the fixed base 1. The control rack 54 transmits torque to the propulsion wave ring 51 through the reversing gear set 55, that is, the movement of the control rack 54 can drive the rotation of the propulsion wave ring 51. The sensing valve plate 52 is located in the oil pressure chamber 12, one end of the initial position spring 521 is fixedly connected to the fixed base 1, and the other end is fixedly connected to the sensing valve plate 52. When the oil pressure in the oil pressure chamber 12 remains stable in a natural state, the sensing valve plate 52 blocks the passage in the oil pressure chamber 12, and at this time, each unit block 231 is respectively located at the trough between two adjacent propulsion protrusions 511; when the oil pressure in the oil pressure chamber 12 changes and the oil flows, the sensing valve plate 52 is pushed to flip, and finally, under the action of the gear pair, the wave ring 51 is pushed to rotate, and the propulsion protrusion 511 generates abutment force on the unit block 231, and each unit block 231 moves synchronously close to the driving piston 3 and presses against the side wall of the driving piston 3, so as to achieve the purpose of lateral support for the driving piston 3.

[0039] like Figure 3 and 4As shown, in this embodiment, the number of unit blocks 231 of a single support ring 23 is twelve, and the maximum flip angle of the sensing valve plate 52 is 60°. When the sensing valve plate 52 flips 60°, the propulsion wave ring 51 rotates 15° accordingly, and each unit block 231 also changes from the trough of the inner side of the propulsion wave ring 51 to the crest, and the unit block 231 is located closest to the driving piston 3. During the long-term operation of the brake, in the initial stage, when the sensing valve plate 52 only flips 25°-36°, the unit block 231 can be pressed against the driving piston 3; with long-term use, the wear of the unit block 231 becomes more serious, and the flip angle required for the sensing valve plate 52 gradually increases; when the sensing valve plate 52 needs to flip more than 50° to make the unit block 231 abut against the driving piston 3, the original part needs to be replaced.

[0040] like Figure 3 and 4 As shown, the auxiliary rubber ring 24 is provided with a plurality of transition grooves 241 on one side facing the unit block 231. The number of the transition grooves 241 is the same as the number of the unit blocks 231. The length direction of the transition groove 241 is the radial direction of the driving piston 3. A single transition groove 241 is located between two adjacent unit blocks 231. When each unit block 231 moves synchronously toward the driving piston 3, the gap between each two adjacent unit blocks 231 gradually decreases. The provision of the transition groove 241 is intended to reduce the squeezing of the unit block 231 on the auxiliary rubber ring 24, thereby reducing the obstruction of the auxiliary rubber ring 24 to the movement of the unit block 231.

[0041] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A brake for a wheel side of a mining truck, comprising a fixed base (1), a driving piston (3) and a friction plate (4), wherein the fixed base (1) is provided with an oil pressure chamber (12) and a driving groove (13), the driving piston (3) is slidably arranged in the driving groove (13), the oil pressure chamber (12) and the bottom of the driving groove (13) are communicated, the friction plate (4) is located on the side of the driving piston (3) facing the brake disc, a sealing ring (2) is provided between the driving piston (3) and the groove wall of the driving groove (13), and the characteristics are as follows: A plurality of embedded annular grooves (131) are provided on the groove wall of the driving groove (13), the sealing ring (2) is provided with a plurality of embedded annular grooves (131) for the sealing ring (2) to be embedded, the sealing ring (2) comprises an elastic ring (21) and a support ring (23), the elastic ring (21) is made of rubber, and the support ring (23) is made of polytetrafluoroethylene.

2. A brake for a mining truck wheel according to claim 1, characterized in that: A protective ring (22) is also provided in the embedded annular groove (131) in which the elastic ring (21) is placed. The protective ring (22) and the elastic ring (21) are coaxial, and the protective ring (22) is located on a side of the elastic ring (21) close to the friction plate (4).

3. A wheel brake for a mining truck according to claim 1 or 2, characterized in that: A connecting magnetic block (31) is fixedly connected to the side of the driving piston (3) facing the friction plate (4), and a magnetic metal block (41) is fixedly provided to the side of the friction plate (4) facing the driving piston (3).

4. A wheel brake for a mining truck according to claim 1 or 2, characterized in that: A dustproof isolation ring gasket (32) is connected between the driving piston (3) and the fixed base (1); the dustproof isolation ring gasket (32) and the driving piston (3) are coaxial; a sealing arch surface (321) is formed on a side of the dustproof isolation ring gasket (32) facing the friction plate (4); the sealing arch surface (321) abuts against the friction plate (4).

5. The wheel brake for a mining truck according to claim 1, characterized in that: An auxiliary rubber ring (24) is also provided in the embedded ring groove (131) of the support ring (23). The auxiliary rubber ring (24) and the support ring (23) are coaxial. The auxiliary rubber ring (24) is located on the side of the support ring (23) facing the oil pressure chamber (12). The support ring (23) comprises a plurality of unit blocks (231). The unit blocks (231) are movably connected to the fixed base (1). A control component (5) is provided in the fixed base (1). The control component (5) is used to control the movement of each unit block (231). The movement direction of the unit block (231) is to move towards or away from the driving piston (3).

6. A brake for a mining truck wheel according to claim 5, characterized in that: A plurality of the unit blocks (231) are arranged in a circumferential array around the driving piston (3); the unit blocks (231) are slidably connected to the fixed base (1); the sliding direction is the radial direction of the driving piston (3); and the control component (5) is used to make the unit blocks (231) approach and abut against the driving piston (3) when the driving piston (3) moves relative to the fixed base (1).

7. A wheel brake for a mining truck according to claim 6, characterized in that: The control assembly (5) comprises a propulsion wave ring (51), the propulsion wave ring (51) being rotatably connected to the fixed base (1), the propulsion wave ring (51) being coaxially sleeved outside the support ring (23), a plurality of propulsion protrusions (511) being formed on the inner edge of the propulsion wave ring (51), the propulsion protrusions (511) being in abutment with a side of the unit block (231) facing away from the drive piston (3).

8. The wheel brake for a mining truck according to claim 7, characterized in that: The control assembly (5) comprises a sensing valve plate (52), a control gear (53), a control rack (54) and a reversing gear set (55); the sensing valve plate (52) is located in the oil pressure chamber (12) and is rotatably connected to the fixed base (1); the control gear (53) is coaxially fixedly connected to the rotating shaft of the sensing valve plate (52); the control rack (54) is slidably connected to the fixed base (1); the reversing gear set (55) is located on the fixed base (1); and the control rack (54) transmits torque to the propulsion wave ring (51) through the reversing gear set (55).

9. A wheel brake for a mining truck according to claim 8, characterized in that: The control component (5) further comprises an initial position spring (521), one end of the initial position spring (521) being connected to the fixed base (1), and the other end of the initial position spring (521) being connected to the sensing valve plate (52). When the oil pressure in the oil pressure chamber (12) remains stable, the sensing valve plate (52) blocks the passage in the oil pressure chamber (12).

10. A wheel brake for a mining truck according to any one of claims 6 to 9, characterized in that: A plurality of transition grooves (241) are formed on a side of the auxiliary rubber ring (24) facing the unit block (231); the number of the transition grooves (241) is the same as the number of the unit blocks (231); the length direction of the transition groove (241) is the radial direction of the driving piston (3); and a single transition groove (241) is located between two adjacent unit blocks (231).

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