A parking brake for a mining truck

Abstract

The present invention discloses a parking brake for mining trucks, belonging to the technical field of brakes, which includes a base, a piston body, a brake pad, a brake disc spring and a hydraulic drive system, wherein two piston bodies are arranged opposite to each other, and both piston bodies are slidably matched with the base body, two brake pads are arranged and the two brake pads are respectively installed on the opposite side of the two piston bodies, and a pan-seal ring is arranged between the two piston bodies and the base body, and two brake disc springs are arranged corresponding to the piston body, and the two brake disc springs respectively apply elastic forces to the two piston bodies to move toward each other, and the hydraulic drive system is used to apply driving forces to the two piston bodies to move away from each other. The present application has the effect of ensuring the sealing between the piston body and the base body, thereby facilitating the hydraulic drive system to achieve stable driving of the piston body.

Description

Technical Field

[0001] The invention relates to the field of brakes, in particular to a parking brake for a mining truck. Background Art

[0002] The mining truck parking brake is a parking brake device specially used for mining trucks, i.e. mining trucks. It is mainly used to keep the vehicle stationary and ensure that the mining truck will not slide or move due to external forces (such as wind, slope, etc.) when parked.

[0003] The parking brake for a mining truck usually includes a base, brake pads, springs and a hydraulic drive system, wherein a brake disc is fixedly mounted on the wheel hub of the mining truck, and two brake pads are provided and are located at both ends of the brake disc. When the vehicle is parked, the two brake pads press the brake disc under the elastic force of the spring. When the vehicle is released from parking, the two brake pads are driven by the hydraulic drive system to move away from the brake disc, thereby releasing the pressure on the brake disc.

[0004] Brake pads are usually fixedly installed on the piston body, and the piston body and the base are slidably matched. The hydraulic drive system drives the brake pads to move synchronously by driving the movement of the piston body. A rubber ring is usually arranged between the piston body and the base to reduce the wear caused by friction between the piston body and the base. The rubber ring is prone to wear after long-term use and has poor sealing performance, which makes it difficult for the hydraulic drive system to stably drive the piston body. Summary of the invention

[0005] In order to ensure the sealing between the piston body and the base body, and thus facilitate the hydraulic drive system to achieve stable driving of the piston body, the present application provides a parking brake for a mining truck.

[0006] In the first aspect, the present application provides a parking brake for a mining truck, which adopts the following technical solution:

[0007] A parking brake for a mining truck comprises a base, a piston body, a brake pad, a brake disc spring and a hydraulic drive system. Two piston bodies are arranged opposite each other, and both piston bodies are slidably fitted on the base body. Two brake pads are arranged and the two brake pads are respectively installed on the opposite sides of the two piston bodies. A universal seal ring is arranged between the two piston bodies and the base body. Two brake disc springs are arranged corresponding to the piston bodies. The two brake disc springs respectively apply elastic forces to the two piston bodies to move toward each other, and the hydraulic drive system is used to apply driving forces to the two piston bodies to move away from each other.

[0008] By adopting the above technical solution, the Variseal seal has excellent high temperature and high pressure resistance, long service life and low friction coefficient, which is conducive to the Variseal seal to effectively achieve long-term sealing between the piston body and the base, and facilitate the repeated sliding of the piston body relative to the base under the elastic force of the brake disc spring and the driving action of the hydraulic drive system, that is, it is convenient for the hydraulic drive system and the return spring to cooperate to achieve stable driving of the piston body, thereby ensuring the performance of the brake.

[0009] Optionally, the pan-seal sealing ring includes a sealing spring and a sealing jacket, the sealing jacket is made of polytetrafluoroethylene, the sealing spring is an O-type spring, and the sealing spring is made of stainless steel. A sealing installation groove is provided on one side of the sealing jacket, and the O-type spring is embedded in the sealing installation groove.

[0010] By adopting the above technical solution, the sealing jacket made of polytetrafluoroethylene and the sealing spring made of stainless steel are conducive to ensuring the stability and reliability of the Variseal sealing ring under various harsh working conditions, and have strong applicability; the cooperation between the sealing spring and the sealing installation groove facilitates the rapid installation of the sealing spring between the sealing jacket while ensuring the performance of the Variseal sealing ring.

[0011] Optionally, the piston body includes an installation sliding part and an installation braking part, the installation sliding part is fixedly installed at one end of the installation braking part and the cross-sectional size of the installation sliding part is larger than the cross-sectional size of the installation braking part; the base is provided with two installation sliding grooves corresponding to the two piston bodies respectively, the installation sliding groove includes a first sliding section and a second sliding section, the installation sliding part slides and fits in the first sliding section, and the installation braking part slides and fits in the second sliding section; the Pan-Seal sealing ring is provided with two groups corresponding to the piston body, each group of the Pan-Seal sealing rings is provided with two, one of the Pan-Seal sealing rings in each group is embedded and installed in the outer peripheral surface of the installation sliding part, and the other Pan-Seal sealing ring is embedded and installed in the groove wall of the second sliding section, and the sealing installation groove notches of the two Pan-Seal sealing rings in each group are arranged opposite to each other.

[0012] By adopting the above technical solution, it is convenient to further ensure the sealing between the piston body and the base when it slides, so that when the hydraulic drive system drives the piston body to slide, the hydraulic oil is less likely to leak from the first sliding section, thereby facilitating the hydraulic drive system to drive the piston body more stably.

[0013] Optionally, the base includes a caliper body and a fixed seat, the caliper body is provided with a fixed groove, the fixed seat is slidably fitted in the fixed groove, the two piston bodies are slidably fitted in the caliper body, the caliper body is provided with an adjustment groove that penetrates and is connected to the fixed groove, the adjustment groove extends along the length direction of the fixed groove, the fixed seat is threaded with an adjustment bolt, and the adjustment bolt is slidably fitted in the adjustment groove.

[0014] By adopting the above technical solution, by loosening or tightening the adjusting bolt, the adjusting bolt can be pressed or loosened against the caliper body to achieve the fixing or loosening of the position of the caliper body, which is convenient and quick, and by moving the adjusting bolt to different positions in the adjusting groove, it is easy to adjust the elastic force of the two brake disc springs, which is convenient to ensure the uniformity of the elastic force applied by the two brake disc springs, which is beneficial to further ensure the overall service life of the brake.

[0015] Optionally, a reinforcement plate and a reinforcement screw are provided in the adjustment groove, the reinforcement plate is located on one side of the adjustment bolt in the horizontal direction, the reinforcement plate is equal in length to the adjustment groove and is slidably fitted in the adjustment groove, the reinforcement screw is rotatably installed on the reinforcement plate, and the reinforcement screw is passed through and threadedly fitted in the clamp body.

[0016] By adopting the above technical solution, when force is applied to rotate the reinforcing screw, the reinforcing plate moves towards or away from the adjusting bolt under the limiting action of the adjusting groove. When the reinforcing plate tightens the adjusting bolt, it is helpful to further ensure the stability of the position of the adjusting bolt after adjustment.

[0017] Optionally, the caliper body is installed with two adjusting blocks, and the two brake disc springs are respectively located between the two adjusting blocks and the two piston bodies. The caliper body is provided with a driving assembly for driving one of the adjusting blocks to move toward or away from the other adjusting block. The driving assembly includes a driving screw and a driving nut. One end of the driving screw is rotatably engaged with a side of one of the adjusting blocks away from the other adjusting block. The driving screw is penetrated and threadedly engaged with the caliper body, and the driving nut is threadedly engaged with the driving screw.

[0018] By adopting the above technical scheme, when the driving screw is rotated by applying force, one of the adjusting blocks moves towards or away from the other adjusting block under the drive of the driving screw, and the driving nut is tightened against the caliper body by screwing the driving nut, which is beneficial to fully ensure the stability of the position of the driving screw and the adjusting block after movement; by adjusting the position of the adjusting block, it is convenient to synchronously adjust the elastic force of the brake disc spring, thereby facilitating adaptation to different braking conditions, and the applicability is strong.

[0019] Optionally, the adjustment block includes an adjustment sliding part and an adjustment fixed plate, the adjustment sliding part is passed through and slidably engaged with the adjustment fixed plate, the adjustment sliding part is provided with a fixing component for fixing or not fixing the adjustment fixed plate, and a spare disc spring is provided between the adjustment fixed plate and the adjustment sliding part.

[0020] By adopting the above technical solution, when the brake disc spring becomes insufficiently elastic due to other factors such as prolonged use or external force, the fixing of the adjusting fixing plate can be released by the fixing component so that the spare disc spring can supplement the original elastic force through the elastic action on the adjusting fixing plate, thereby helping to ensure the braking effect of the brake and extend the service life of the brake.

[0021] Optionally, the fixing assembly includes a fixed driving rod, a fixed clamping block and a fixing spring, the fixed driving rod is passed through and slidably engaged with the adjusting sliding part, the fixed driving rods of the two adjusting blocks are respectively passed through and threadedly engaged with the driving screw and the clamp body, a fixed driving surface is obliquely arranged at the bottom of the fixed driving rod, one end of the fixed clamping block abuts against the fixed driving surface, the fixed clamping block is passed through radially of the adjusting sliding part and slidably engaged with the adjusting sliding part, the fixing spring applies an elastic force to the fixed clamping block to move toward the axial direction of the adjusting sliding part, the adjusting fixing plate is provided with a fixing clamping hole corresponding to the fixed clamping block, and the fixed clamping block is plugged into the fixing clamping hole.

[0022] By adopting the above technical solution, when force is applied to rotate the fixed driving rod, the fixed driving rod moves in a direction close to or away from the fixed clamping block, thereby driving the fixed clamping block to move in a direction close to or away from the axis of the adjusting sliding part through the cooperation of the fixed driving surface and the elastic force of the fixed spring. When the fixed clamping block is disengaged from the fixed clamping hole, the fixation between the adjusting fixing plate and the adjusting sliding part is released. The setting of the fixed driving rod makes the operation of releasing the fixation between the adjusting fixing plate and the adjusting sliding part convenient and quick.

[0023] Optionally, a plurality of the fixed blocks, fixed holes and fixed springs are distributed around the axis of the adjusting sliding portion.

[0024] By adopting the above technical solution, the cooperation of multiple groups of fixed card blocks and fixed card holes is conducive to fully ensuring the stability of the position between the adjustment fixing plate and the adjustment sliding part when they are fixed.

[0025] Optionally, the adjustment block further includes an adjustment guide portion, which is fixedly mounted on one end of the adjustment sliding portion, and the adjustment guide portion penetrates and slidably fits in the piston body.

[0026] By adopting the above technical solution, the setting of the adjustment guide part plays a role in limiting and guiding the piston body and the adjustment guide part during movement, which is beneficial to further ensure the stability of the piston body or the adjustment guide part during movement.

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

[0028] 1. The Variseal seal has excellent high temperature and high pressure resistance, long service life and low friction coefficient. Therefore, the Variseal seal can effectively seal the piston body and the base body for a long time, and facilitate the repeated sliding of the piston body relative to the base body under the elastic force of the brake disc spring and the driving action of the hydraulic drive system. That is, it is convenient for the hydraulic drive system and the return spring to cooperate to achieve stable driving of the piston body and ensure the performance of the brake.

[0029] 2. By moving the adjusting bolt to different positions in the adjusting slot, it is convenient to adjust the elastic force of the two brake disc springs, so as to ensure the uniformity of the elastic force applied by the two brake disc springs, thereby further ensuring the overall service life of the brake.

[0030] 3. By adjusting the position of the adjustment block, it is convenient to adjust the elastic force of the brake disc spring synchronously, so as to adapt to different braking conditions and has strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of Example 1 of the present application.

[0032] Figure 2 It is a partial cross-sectional schematic diagram of the overall structure in Example 1 of the present application.

[0033] Figure 3 It is a schematic diagram of the main structure of the flow channel in Example 1 of the present application.

[0034] Figure 4 It is a schematic diagram of the top view structure in Example 2 of the present application.

[0035] Figure 5 yes Figure 4 Schematic diagram of the partial cross-section of AA.

[0036] Figure 6 yes Figure 5 A partial enlarged schematic diagram of part A.

[0037] Figure 7 yes Figure 4 Schematic diagram of a partial cross-section of the BB.

[0038] Description of reference numerals:

[0039] 1. Base; 101. Caliper body; 102. Fixed seat; 2. Piston body; 201. Install sliding part; 202. Install brake part; 3. Brake pad; 4. Brake disc spring; 5. Fixed groove; 6. Adjustment groove; 7. Adjustment bolt; 8. Gasket; 9. Install slide groove; 901. First sliding section; 902. Second sliding section; 10. Pan seal ring; 1001. Sealing spring; 1002. Sealing jacket; 11. Sealing installation groove; 12. Flow channel; 121. Liquid inlet section; 122. Driving section; 13. Liquid inlet pipe; 14. Adjusting block; 141. First adjusting block; 142. Second adjusting block; 15. Dust cover; 16. Driving screw; 17. Driving nut; 18. Adjusting guide; 19. Adjusting sliding part; 20. Adjusting fixing plate; 21. Spare disc spring; 22. Fixed driving rod; 23. Fixed clamping block; 24. Fixed spring; 25. Fixed driving surface; 26. Fixed fitting surface; 27. Fixed slide groove; 28. Fixed clamping hole; 29. ​​Reinforcing plate; 30. Reinforcing screw. DETAILED DESCRIPTION

[0040] The following is combined with Figure 1-7 This application is described in further detail.

[0041] The embodiment of the present application discloses a parking brake for a mining truck.

[0042] Example 1.

[0043] Reference Figure 1 and Figure 2 The parking brake for a mining truck includes a base 1, a piston body 2, a brake pad 3, a brake disc spring 4 and a hydraulic drive system, wherein the base 1 includes a caliper body 101 and a fixing seat 102, wherein a fixing groove 5 is opened on one side of the caliper body 101, the fixing groove 5 extends along the height direction of the caliper body 101, and the fixing groove 5 is arranged along the width direction of the caliper body 101, and the fixing seat 102 is slidably fitted in the caliper body 101 along the height direction of the caliper body 101.

[0044] Reference Figure 2 The bottom wall of the fixing groove 5 is provided with an adjustment groove 6 which is arranged through the fixing groove 5. The adjustment groove 6 extends along the length direction of the fixing groove 5, that is, the height direction of the caliper body 101. The fixing seat 102 is threadedly matched with an adjustment bolt 7. The adjustment bolt 7 is slidably matched with the adjustment groove 6. When the adjustment bolt 7 is screwed against the caliper body 101, the position of the caliper body 101 is firmly fixed. A gasket 8 is arranged between the adjustment bolt 7 and the caliper body 101 to increase the contact area between the adjustment bolt 7 and the caliper body 101 when they are fixed, and to reduce the pressure between the adjustment bolt 7 and the caliper body 101 when the caliper body 101 is fixed.

[0045] Reference Figure 1 and Figure 2There are two piston bodies 2 facing each other. Both piston bodies 2 slide and fit in the fixed seat 102 along the height direction of the caliper body 101. Specifically, the piston body 2 includes a mounting sliding part 201 and a mounting brake part 202. The mounting sliding part 201 is integrally fixedly installed at one end of the mounting brake part 202 and the cross-sectional size of the mounting sliding part 201 is larger than the cross-sectional size of the mounting brake part 202. The fixed seat 102 is provided with two mounting slide grooves 9 corresponding to the two piston bodies 2 respectively. The notches of the two mounting slide grooves 9 are facing each other. The mounting slide grooves 9 include a first sliding section 901 and a second sliding section 902. The mounting sliding part 201 slides and fits in the first sliding section 901, and the mounting brake part 202 slides and fits in the second sliding section 902.

[0046] Reference Figure 2 A Variseal seal ring 10 is arranged between the piston body 2 and the base body 1. Two groups of Variseal seal rings 10 are arranged corresponding to the piston body 2, and each group of Variseal seal rings 10 is provided with two. Specifically, the Variseal seal ring 10 includes a sealing spring 1001 and a sealing jacket 1002, wherein the material of the sealing jacket 1002 is selected as polytetrafluoroethylene in the embodiment of the present application, the sealing spring 1001 is selected as an O-type spring, and the material of the sealing spring 1001 is selected as stainless steel in the embodiment of the present application. A sealing installation groove 11 is opened on one side of the sealing jacket 1002, and the O-type spring is embedded and installed in the sealing installation groove 11 to ensure the performance of the Variseal seal ring 10 and facilitate the stability and reliability of the Variseal seal ring 10 under various harsh working conditions.

[0047] Continue to refer to Figure 2 In each group, one of the Variseal seal rings 10 is set as the first seal ring, and the other Variseal seal ring 10 is set as the second seal ring, wherein the first seal ring is embedded and installed on the outer peripheral surface of the installation sliding portion 201, and the second seal ring is embedded and installed on the groove wall of the second sliding section 902, and the sealing installation grooves 11 of the first seal ring and the second seal ring are arranged opposite to each other, so as to fully ensure the sealing between the piston body 2 and the base body 1 when sliding.

[0048] Reference Figure 2 and Figure 3 A flow channel 12 is provided on one side of the fixed seat 102. The flow channel 12 includes a liquid inlet section 121 and two drive sections 122. One end of the two drive sections 122 is connected to the liquid inlet section 121, and one end of the two drive sections 122 away from the liquid inlet section 121 is respectively connected to the two second sliding sections 902. The hydraulic drive system includes a liquid inlet pipe 13 and a hydraulic cylinder (not shown in the figure), wherein one end of the liquid inlet pipe 13 is connected to the hydraulic cylinder and the other end is connected to the opening installed in the liquid inlet section 121, so as to realize the liquid inlet or liquid discharge in the second sliding section 902 through the hydraulic cylinder, thereby realizing the sliding of the piston body 2 in the installation slide groove 9.

[0049] Reference Figure 2In order to facilitate the resetting of the two piston bodies 2 when they move toward each other, two brake disc springs 4 are provided corresponding to the piston bodies 2. The two brake disc springs 4 are respectively rotated on the side of the two piston bodies 2 that are away from each other, so as to exert elastic forces on the two piston bodies 2 to move toward each other. Two brake pads 3 are provided corresponding to the piston bodies 2. The two brake pads 3 are respectively installed on the side facing the two piston bodies 2 by bolts, so as to realize the parking of the mining truck by pressing the brake disc with the two brake pads 3.

[0050] Continue to refer to Figure 2 In order to facilitate the adjustment of the elastic force of the brake disc spring 4 to adapt to different parking conditions, the caliper body 101 is equipped with two adjustment blocks 14, and the two adjustment blocks 14 are respectively located on the side away from the two piston bodies 2, and the two brake disc springs 4 are respectively located between the two adjustment blocks 14 and the two piston bodies 2. The two adjustment blocks 14 are respectively set to a first adjustment block 141 and a second adjustment block 142, wherein the first adjustment block 141 is fixedly connected to the caliper body 101, and the caliper body 101 is provided with a driving component for driving the second adjustment block 142 to move toward or away from the second adjustment block 142. After the second adjustment block 142 is driven to move by the driving component, combined with the adjustment of the position of the fixing seat 102 in the fixing groove 5, it is convenient to ensure the uniformity of the two brake pads 3 when pressing the brake disc after the elastic force of the brake disc spring 4 is adjusted. Elastic dust covers 15 are provided between the first adjusting block 141 and the second adjusting block 142 and the fixing seat 102 . The two elastic dust covers 15 cover the two brake disc springs 4 respectively to further ensure the performance of the brake disc springs 4 .

[0051] Reference Figure 1 and Figure 2 The driving assembly includes a driving screw 16 and a driving nut 17, wherein one end of the driving screw 16 is rotatably engaged with a side of the second adjustment block 142 away from the other first adjustment block 141, the driving screw 16 is penetrated and threadedly engaged with the pliers body 101, and the driving nut 17 is threadedly engaged with the driving screw 16, so that the position of the second adjustment block 142 can be adjusted by rotating the driving screw 16. After the position of the second adjustment block 142 is adjusted, the driving nut 17 is screwed so that the driving nut 17 is pressed against the pliers body 101, which is conducive to further ensuring the stability of the position of the second adjustment block 142 after adjustment.

[0052] Reference Figure 2 The first adjustment block 141 and the second adjustment block 142 are each provided with an adjustment guide portion 18 on one side thereof, and the two adjustment guide portions 18 are respectively coaxially arranged and slidably fitted on the two piston bodies 2, so as to play a limiting and guiding role in the relative movement of the piston body 2 and the adjustment block 14, thereby facilitating further ensuring the stability of the piston body 2 or the adjustment guide portion 18 during movement.

[0053] The implementation principle of Example 1 is as follows: in the embodiment of the present application, since the Variseal seal ring 10 has excellent high temperature and high pressure resistance, long service life and low friction coefficient, it is beneficial for the Variseal seal ring 10 to effectively achieve long-term sealing between the piston body 2 and the base body 1, and facilitate the piston body 2 to repeatedly slide relative to the base body 1 under the elastic force of the brake disc spring 4 and the driving action of the hydraulic drive system, that is, it is convenient for the hydraulic drive system and the return spring to cooperate to achieve stable driving of the piston body 2, thereby ensuring the performance of the brake.

[0054] Example 2.

[0055] Reference Figure 4 and Figure 5 The main difference between this embodiment and embodiment 1 is that the structure of the adjustment block 14 is different. Figure 6 The two adjustment blocks 14 in the embodiment of the present application both include an adjustment sliding portion 19, an adjustment guide portion 18 and an adjustment fixed plate 20, wherein the two guide portions are fixedly installed at one end of the two adjustment sliding portions 19 that are close to each other, and the two adjustment guide portions 18 are respectively coaxially penetrated and slidably matched with the two piston bodies 2 to play a limiting and guiding role when the piston body 2 and the adjustment block 14 move relative to each other.

[0056] Reference Figure 5 and Figure 6 The adjusting sliding part 19 is passed through and slidably matched with the adjusting fixing plate 20. The adjusting sliding part 19 is provided with a fixing component for fixing or not fixing the adjusting fixing plate 20. The brake disc spring 4 is arranged between the adjusting fixing plate 20 and the piston body 2. A spare disc spring 21 is also arranged between the adjusting fixing plate 20 and the adjusting sliding part 19, so that when the brake disc spring 4 has insufficient elasticity due to other factors such as long-term use or external force, the fixing of the adjusting fixing plate 20 can be released by the fixing component, so that the spare disc spring 21 can supplement the original elastic force through the elastic effect on the adjusting fixing plate 20, which is beneficial to ensure the braking effect of the brake and extend the service life of the brake.

[0057] Continue to refer to Figure 5 and Figure 6 Specifically, the fixing assembly includes a fixed driving rod 22, a fixed clamping block 23 and a fixed spring 24. The fixed driving rod 22 is coaxially penetrated and slidably engaged with the adjusting sliding portion 19. The fixed driving rod 22 of the first adjusting block 141 is penetrated and threadedly engaged with the caliper body 101. The fixed driving rod 22 of the second adjusting block 142 is coaxially penetrated and threadedly engaged with the driving screw 16, so that when the fixed driving rod 22 is screwed, the fixed driving rod 22 moves in a direction close to or away from the adjusting block 14.

[0058] Reference Figure 6, the end of the fixed driving rod 22 facing the adjusting block 14 is in a truncated cone shape, that is, the outer peripheral surface of the end of the fixed driving rod 22 facing the adjusting block 14 is an inclined fixed driving surface 25. There are multiple fixed clamping blocks 23 evenly distributed around the axis of the adjusting block 14. In the embodiment of the present application, there are two fixed clamping blocks 23. Both fixed clamping blocks 23 are radially penetrated and slidably matched with the adjusting sliding portion 19. The ends of the two fixed clamping blocks 23 close to the adjusting sliding portion 19 are provided with fixed fitting surfaces 26 that are in conflict with the fixed driving surface 25, so that when the fixed driving rod 22 moves in a direction close to the adjusting block 14, the two fixed clamping blocks 23 are driven to move in a direction away from the adjusting sliding portion 19 through the cooperation of the fixed driving surface 25 and the fixed fitting surface 26.

[0059] Continue to refer to Figure 6 Specifically, a fixed slide groove 27 extending along its own radial direction is provided on the outer circumferential surface of the adjusting sliding part 19, and two fixed slide grooves 27 are correspondingly arranged on the fixed block 23. The two fixed blocks 23 are respectively slidably fitted in the two fixed slide grooves 27, and two fixed springs 24 are correspondingly arranged on the fixed block 23. One end of the fixed spring 24 is installed on the groove wall of the fixed slide groove 27, and the other end is installed on the fixed block 23, so that the fixed spring 24 applies an elastic force to the fixed block 23 to move toward the axial direction of the adjusting sliding part 19, so that when the fixed driving rod 22 moves in the direction away from the adjusting block 14, the two fixed blocks 23 move toward the axial direction of the adjusting sliding part 19 under the action of the elastic force of the fixed spring 24.

[0060] Reference Figure 5 and Figure 6 The adjustment fixing plate 20 is provided with two fixing holes 28 corresponding to the two fixing blocks 23. The two fixing blocks 23 are respectively plugged into the two fixing holes 28. When one end of the two fixing blocks 23 is located away from the axis of the adjustment sliding portion 19 and inserted into the fixing holes 28, the adjustment fixing plate 20 is fixed; when one end of the two fixing blocks 23 is located close to the axis of the adjustment sliding portion 19 and is separated from the fixing holes 28, the adjustment fixing plate 20 is released.

[0061] In addition, refer to Figure 4 and Figure 7 In order to further ensure the stability of the position of the adjusting bolt 7 and the fixing seat 102 when they are fixed in the embodiment of the present application, a reinforcing plate 29 and a reinforcing screw 30 are also provided in the adjusting groove 6. The reinforcing plate 29 is located on one side of the horizontal direction of the adjusting bolt 7, that is, the width direction of the caliper body 101. The reinforcing screw 30 is rotatably installed on the side of the reinforcing plate 29 away from the adjusting bolt 7. The reinforcing screw 30 is annularly arranged and threadedly engaged with the caliper body 101. When the reinforcing screw 30 is screwed so that the reinforcing screw 30 is pressed against the adjusting bolt 7, the position of the adjusting bolt 7 is further limited.

[0062] The implementation principle of Example 2 of the present application is the same as that of Example 1, so it will not be repeated here.

[0063] 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 parking brake for a mining truck, characterized in that: The invention comprises a base body (1), a piston body (2), a brake pad (3), a brake disc spring (4) and a hydraulic drive system, wherein two piston bodies (2) are arranged opposite each other, and the two piston bodies (2) are both slidably matched with the base body (1), two brake pads (3) are arranged and the two brake pads (3) are respectively installed on the opposite side of the two piston bodies (2), and a universal seal ring (10) is arranged between the two piston bodies (2) and the base body (1), and two brake disc springs (4) are arranged corresponding to the piston body (2), and the two brake disc springs (4) respectively apply elastic force to the two piston bodies (2) to move in a direction toward each other, and the hydraulic drive system is used to apply a driving force to the two piston bodies (2) to move in a direction away from each other; The base (1) comprises a caliper body (101) and a fixing seat (102); the caliper body (101) is provided with a fixing groove (5); the fixing seat (102) is slidably fitted in the fixing groove (5); the two piston bodies (2) are slidably fitted in the caliper body (101); the caliper body (101) is provided with an adjustment groove (6) penetrating and connected with the fixing groove (5); the adjustment groove (6) extends along the length direction of the fixing groove (5); the fixing seat (102) is threadedly fitted with an adjustment bolt (7); the adjustment bolt (7) is slidably fitted in the adjustment groove (6); The caliper body (101) is installed with two adjustment blocks (14), and the two brake disc springs (4) are respectively located between the two adjustment blocks (14) and the two piston bodies (2). The caliper body (101) is provided with a driving component for driving one of the adjustment blocks (14) to move toward or away from the other adjustment block (14), and the driving component includes a driving screw (16) and a driving nut (17). One end of the driving screw (16) is rotatably engaged with a side of one of the adjustment blocks (14) away from the other adjustment block (14), the driving screw (16) is penetrated and threadedly engaged with the caliper body (101), and the driving nut (17) is threadedly engaged with the driving screw (16).

2. A parking brake for a mining truck according to claim 1, characterized in that: The Variseal seal ring (10) comprises a sealing spring (1001) and a sealing jacket (1002), wherein the sealing jacket (1002) is made of polytetrafluoroethylene, the sealing spring (1001) is an O-type spring, and the sealing spring (1001) is made of stainless steel. A sealing installation groove (11) is provided on one side of the sealing jacket (1002), and the O-type spring is embedded and installed in the sealing installation groove (11).

3. A parking brake for a mining truck according to claim 2, characterized in that: The piston body (2) comprises a mounting sliding portion (201) and a mounting braking portion (202); the mounting sliding portion (201) is fixedly mounted on one end of the mounting braking portion (202) and the cross-sectional dimension of the mounting sliding portion (201) is larger than the cross-sectional dimension of the mounting braking portion (202); the base (1) is provided with two mounting sliding grooves (9) corresponding to the two piston bodies (2) respectively, the mounting sliding groove (9) comprises a first sliding section (901) and a second sliding section (902), the mounting sliding portion (201) is slidably matched with the first sliding section The movable section (901) is provided with a mounting brake portion (202) which is slidably matched with the second sliding section (902); two groups of the Variseal sealing ring (10) and the piston body (2) are provided correspondingly, and each group of the Variseal sealing ring (10) is provided with two groups, one of the Variseal sealing rings (10) in each group is embedded and installed on the outer peripheral surface of the mounting sliding portion (201), and the other Variseal sealing ring (10) is embedded and installed on the groove wall of the second sliding section (902), and the sealing installation grooves (11) of the two Variseal sealing rings (10) in each group are arranged opposite to each other.

4. The parking brake for a mining truck according to claim 1, characterized in that: A reinforcing plate (29) and a reinforcing screw rod (30) are arranged in the adjusting groove (6); the reinforcing plate (29) is located on one side of the adjusting bolt (7) in the horizontal direction; the reinforcing plate (29) is equal in length to the adjusting groove (6) and is slidably fitted in the adjusting groove (6); the reinforcing screw rod (30) is rotatably mounted on the reinforcing plate (29); and the reinforcing screw rod (30) is passed through and threadedly fitted in the caliper body (101).

5. The parking brake for a mining truck according to claim 1, characterized in that: The adjusting block (14) comprises an adjusting sliding part (19) and an adjusting fixing plate (20), wherein the adjusting sliding part (19) is inserted through and slidably engaged with the adjusting fixing plate (20), the adjusting sliding part (19) is provided with a fixing component for fixing or not fixing the adjusting fixing plate (20), and a spare disc spring (21) is provided between the adjusting fixing plate (20) and the adjusting sliding part (19).

6. A parking brake for a mining truck according to claim 5, characterized in that: The fixing assembly comprises a fixed driving rod (22), a fixed clamping block (23) and a fixing spring (24); the fixed driving rod (22) is inserted through and slidably engaged with the adjusting sliding part (19); the fixed driving rods (22) of the two adjusting blocks (14) are respectively inserted through and threadedly engaged with the driving screw (16) and the clamp body (101); a fixed driving surface (25) is obliquely arranged at the bottom of the fixed driving rod (22); one end of the fixed clamping block (23) abuts against the fixed driving surface (25); the fixed clamping block (23) is inserted through and slidably engaged with the adjusting sliding part (19) along the radial direction of the adjusting sliding part (19); the fixing spring (24) applies an elastic force to the fixed clamping block (23) to move toward the axial direction of the adjusting sliding part (19); the adjusting fixing plate (20) is provided with a fixing clamping hole (28) corresponding to the fixing clamping block (23); the fixing clamping block (23) is plugged into the fixing clamping hole (28).

7. A parking brake for a mining truck according to claim 6, characterized in that: A plurality of the fixed clamping blocks (23), fixed clamping holes (28) and fixed springs (24) are distributed around the axis of the adjusting sliding portion (19).

8. The parking brake for a mining truck according to claim 5, characterized in that: The adjustment block (14) further comprises an adjustment guide portion (18), wherein the adjustment guide portion (18) is fixedly mounted on one end of the adjustment sliding portion (19), and the adjustment guide portion (18) penetrates and slidably fits the piston body (2).

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