Mining vehicle and its parking brake arrangement

Abstract

The utility model discloses a mine vehicle and parking brake device thereof, the parking brake device is arranged on the power transmission path upstream of main reducer of mine vehicle, the parking brake device includes parking brake disc, caliper brake and drive mechanism, the power input path of parking brake disc is fixed in main reducer, the caliper brake is fixed in the side of parking brake disc, and the disc surface of parking brake disc is located in the jaw of caliper brake, drive mechanism is fixedly connected with caliper brake, is used for exerting pressure to caliper brake to clamp parking brake disc. Application scheme, through the speed ratio of main reducer, the amplification torque effect is obtained, the brake force provided by parking brake device is amplified, and the maintenance cost of whole life cycle is reduced. In addition, the brake force difference between the wheels can also be reduced, and the safety and reliability of parking brake are further improved.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, specifically to a mining vehicle and its parking brake device. Background Technology

[0002] As mining vehicles increasingly move towards larger tonnage and higher load capacity, parking brake systems face increasingly stringent technical requirements. In the application scenarios of large-tonnage mining vehicles, traditional wheel-side parking brake devices suffer from insufficient braking force, high maintenance costs, and installation space limitations imposed by the wheel-side space.

[0003] Wheel-side brakes share the wheel-side space with the service brake system. The size of the brake disc or brake drum is limited by the wheel-side space. At the same time, the introduction of components such as wheel-side motors further squeezes the installation space of wheel-side brakes, resulting in a bottleneck in the braking force provided by the wheel-side parking brake device. This makes it impossible to meet the parking needs of heavy-duty vehicles. In particular, under slope conditions, insufficient braking force may cause the vehicle to roll downhill, posing a safety problem.

[0004] Furthermore, during mining truck operation, wheel-side brakes are constantly exposed to harsh working environments such as mud, water, and gravel, making the brake drums or discs highly susceptible to corrosion and accelerating the wear of the friction linings, requiring more frequent replacements. Moreover, the disassembly and assembly of wheel-side brakes involves components such as wheels and wheel hub bearings, making maintenance and replacement time-consuming and labor-intensive, thus increasing vehicle operating costs.

[0005] In view of this, it is urgent to optimize the parking brake architecture of mining vehicles in order to effectively improve braking force and reduce maintenance costs. Utility Model Content

[0006] To address the aforementioned technical problems, this utility model provides a mining vehicle and its parking brake device. Through structural optimization, it can effectively improve braking force and reduce maintenance costs, providing a good technical guarantee for meeting the stringent working conditions of large-tonnage mining vehicles.

[0007] This utility model provides a parking brake device for a mining vehicle. The parking brake device is located upstream of the power transmission path of the main reducer of the mining vehicle. The parking brake device includes a parking brake disc, a caliper brake, and a drive mechanism. The parking brake disc is fixed on the power input path of the main reducer. The caliper brake is fixed to the side of the parking brake disc, and the disc surface of the parking brake disc is located within the caliper jaws of the caliper brake. The drive mechanism is fixedly connected to the caliper brake and is used to apply pressure to the caliper brake to clamp the parking brake disc.

[0008] Optionally, the parking brake disc is fixed to the input flange of the main reducer, and the caliper brake is fixed to the housing on the input side of the main reducer.

[0009] Optionally, the parking brake device further includes a fixed bracket, which is fixedly mounted on the housing on the input end side of the main reducer, and the caliper brake is fixedly mounted on the fixed bracket.

[0010] Optionally, the fixed bracket is welded to the housing on the input end side of the main reducer, and the caliper brake is fixed to the fixed bracket by threaded fasteners.

[0011] Optionally, the adapted caliper brake and the drive mechanism are configured in multiple sets and are evenly distributed circumferentially relative to the parking brake disc.

[0012] Optionally, the matching caliper brakes and drive mechanisms are configured in two sets and are arranged symmetrically with respect to the parking brake disc.

[0013] Optionally, the drive mechanism is a hydraulic drive mechanism.

[0014] Optionally, a friction pad is embedded inside the jaws of the caliper brake, and the friction pad is made of a friction material.

[0015] This utility model also provides a mining vehicle, which adopts the parking brake device of the mining vehicle as described above.

[0016] Compared with existing technologies, this utility model innovatively proposes a parking brake device for mining vehicles. Specifically, the parking brake device is positioned upstream of the power transmission path of the main reducer, i.e., before the main reducer. The amplified torque effect is achieved through the speed ratio of the main reducer, thereby amplifying the braking force provided by the parking brake device. Furthermore, the arrangement of this parking brake device is not limited by wheel space, allowing for larger brake discs and calipers to be configured according to application needs, such as, but not limited to, larger working diameters and thicker discs, to reliably withstand higher braking torques. Simultaneously, the parking brake device is kept away from mud, water, and gravel in harsh working conditions, effectively avoiding corrosion and unnecessary wear, and reducing unsprung mass to extend suspension life, thus significantly reducing the overall life-cycle maintenance cost. In addition, the parking brake disc is located in the middle of the frame, reducing the difference in braking force between wheels and further improving the safety and reliability of the parking brake. Overall, this design aligns with the evolving trend of mining vehicles towards larger tonnage and higher loads.

[0017] In an optional embodiment of this invention, multiple sets of compatible caliper brakes and drive mechanisms are configured and evenly distributed circumferentially relative to the parking brake disc. This allows the multiple sets of caliper brakes and drive mechanisms to effectively balance the lateral forces during braking. During parking braking, under hydraulic pressure, multiple caliper brakes can operate synchronously, ensuring a uniform distribution of braking force and preventing uneven wear of the brake disc. Simultaneously, the circumferentially distributed caliper brakes reduce uneven bearing stress caused by unilateral braking and avoid the risk of deformation due to excessive clamping force on one side of the caliper, making it particularly suitable for the high inertia loads of heavy-duty mining vehicles. Attached Figure Description

[0018] Figure 1 A schematic diagram illustrating the assembly relationship of a parking brake device for a mining vehicle, provided as an embodiment of this application;

[0019] Figure 2 for Figure 1 Enlarged schematic diagram of part A in the diagram.

[0020] Explanation of reference numerals in the attached figures:

[0021] Parking brake device 10, parking brake disc 1, caliper brake 2, drive mechanism 3, input end flange 4, fixed bracket 5, main reducer 20, drive axle 30, drive shaft 40, drive motor 50. Detailed Implementation

[0022] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] In related technologies, traditional wheel-side brakes share the wheel-side space with the service braking system, and the size of the brake disc or drum is limited by this space. Furthermore, the introduction of components such as wheel-side motors further restricts the installation space for wheel-side brakes, resulting in a bottleneck in the braking force provided by the wheel-side parking brake device, which cannot meet the parking needs of large-tonnage vehicles. In particular, insufficient braking force may cause the vehicle to roll away on slopes, posing a safety risk.

[0024] Furthermore, during mining truck operation, wheel-side brakes are constantly exposed to harsh working environments such as mud, water, and gravel, making the brake drums or discs highly susceptible to corrosion and accelerating the wear of the friction linings, requiring more frequent replacements. Moreover, the disassembly and assembly of wheel-side brakes involves components such as wheels and wheel hub bearings, making maintenance and replacement time-consuming and labor-intensive, thus increasing vehicle operating costs.

[0025] Based on this, this application provides a parking brake device for a mining vehicle. The parking brake device is located upstream of the power transmission path of the main reducer. The parking brake device includes a parking brake disc, a caliper brake, and a drive mechanism. The parking brake disc is fixed on the power input path of the main reducer, the caliper brake is fixed beside the parking brake disc, and the disc surface of the parking brake disc is located inside the caliper jaws of the caliper brake. The drive mechanism is fixedly connected to the caliper brake and is used to apply pressure to the caliper brake to clamp the parking brake disc.

[0026] This configuration places the parking brake upstream of the main reducer's power transmission path, i.e., before the main reducer. The increased torque effect, achieved through the main reducer's speed ratio, amplifies the braking force provided by the parking brake. Furthermore, the parking brake's placement is not limited by wheel-side space, allowing for larger brake discs and calipers to be configured according to application needs—for example, but not limited to larger working diameters and thicker discs—to reliably withstand higher braking torques. Simultaneously, the parking brake is protected from mud, water, and gravel in harsh operating conditions, effectively preventing corrosion and unnecessary wear, and reducing unsprung mass to extend suspension life. This significantly reduces overall lifespan maintenance costs.

[0027] Furthermore, the parking brake disc is located in the middle of the frame, reducing the difference in braking force between wheels and further improving the safety and reliability of the parking brake. Overall, this aligns with the evolving trend of mining vehicles towards larger tonnage and higher load capacity.

[0028] To better understand the technical solution and effects of this application, specific embodiments are described in detail below with reference to the accompanying drawings. Please refer to... Figure 1 and Figure 2 ,in, Figure 1 This is a schematic diagram illustrating the assembly relationship of a parking brake device for a mining vehicle, provided in an embodiment of this application. Figure 2 for Figure 1 Enlarged schematic diagram of part A in the diagram.

[0029] like Figure 1 As shown, the drive axle 30 is driven by the drive motor 50, and the drive shaft 40 and the main reducer 20 are configured independently accordingly. For mining vehicles with multiple drive axles, each drive axle can use the same motor drive system.

[0030] In a specific implementation, the main reducer 20 can be integrated with the differential in the drive axle 30 housing, and connected to the two wheels respectively through the differential and the left and right half-shafts (not shown in the figure). Of course, the main reducer 20 and the differential can also be configured separately, depending on the overall product design requirements, and this application embodiment does not limit this.

[0031] In this embodiment, the parking brake device 10 is located on the upstream side of the power transmission path of the main reducer 20. Here, "upstream" is defined based on the power transmission path, with the side closer to the drive motor 50 being the upstream side and the side closer to the drive axle 30 being the downstream side. It should be understood that the use of the above directional terms is only for clearly describing the relative positional relationship of the corresponding components in this embodiment, and does not constitute a substantial limitation on the parking brake device for which protection is sought in this application.

[0032] Based on the inherent speed ratio of the main reducer 20, the braking torque of the parking brake device 10 can be amplified. Compared with traditional wheel-side brakes, a brake with the same configuration can achieve a greater braking torque and improve the difference in braking force between wheels. In addition, the installation space of the parking brake device 10 no longer depends on the wheel-side space. The parking brake disc 1 can be designed with a larger diameter and thickness to provide a greater braking torque. The parking brake device 10 is free from the influence of complex environments such as mud, water, and gravel around the wheels. While providing higher braking reliability, it reduces unsprung mass, increases suspension life, and significantly reduces the maintenance cost over the entire life cycle.

[0033] In addition, the space around the wheel hub is freed up, which can be used to install components such as intelligent monitoring systems, thus improving the overall vehicle layout.

[0034] Combination Figure 2 As shown, the parking brake device 10 includes a parking brake disc 1, a caliper brake 2, and a drive mechanism 3. The parking brake disc 1 is fixed to the input flange 4 of the main reducer 20, i.e., it is located on the power input path of the main reducer 20. The parking brake disc 1 and the input flange 4 can be reliably fixed using threaded fasteners; the specific fastener can be determined according to the overall product design requirements, and this embodiment does not impose such limitations.

[0035] Correspondingly, the caliper brake 2, which is adapted to the parking brake disc 1, is fixed to the housing on the input end side of the main reducer 20 and maintains a clearance fit with the disc surface of the parking brake disc 1; the drive mechanism 3 is fixed to the caliper brake 2 and is used to apply pressure to the caliper brake 2 to clamp the parking brake disc 1, thus forming a complete brake clamping system.

[0036] In this caliper brake 2, friction pads made of friction material are embedded inside the caliper jaws to ensure stable clamping of the parking brake disc 1 during operation, achieving reliable braking. It is understood that the choice of friction material can be determined according to actual needs, such as, but not limited to, using high-strength friction materials; this embodiment does not impose such limitations.

[0037] Among them, the drive mechanism 3 can be a hydraulic drive mechanism. When the parking brake is applied, high-pressure oil is supplied to the hydraulic drive mechanism through the hydraulic system (not shown in the figure). Its output end can apply force to push the caliper brake 2, so that the friction pad on its inner side contacts the disc body of the parking brake disc 1. By clamping the parking brake disc 1, a frictional torque that can realize parking brake is generated between the friction pad and the parking brake disc 1. Conversely, when the pressure applied by the hydraulic drive mechanism is removed, the caliper brake 2 separates from the parking brake disc 1, and the parking brake is released.

[0038] In a specific implementation, a fixed bracket 5 is fixedly mounted on the housing of the input end side of the main reducer 20, and the caliper brake 2 is fixedly mounted on the fixed bracket 5, thus securing it to the input end side of the main reducer 20. Here, the caliper brake 2 can be connected to the fixed bracket 5 via threaded fasteners, achieving reliable fixation while meeting the functional requirements for compatibility with the parking brake disc 1. The fixed bracket 5, serving as the mounting base for the device, can be welded to the housing of the main reducer 20, or it can be fixedly connected to the housing of the main reducer 20 via threaded fasteners. The specific method can be determined according to the overall product design requirements, and this embodiment does not impose any limitations.

[0039] To prevent uneven wear of the parking brake disc 1, in practical implementations, multiple sets of compatible caliper brakes 2 and drive mechanisms 3 can be configured. For example... Figure 2 As shown, two sets of caliper brakes 2 and drive mechanisms 3 are symmetrically arranged on both sides of the parking brake disc 1 to effectively balance the lateral forces during braking. During parking braking, under the action of hydraulic pressure, the two caliper brakes 2 can operate synchronously to ensure a uniform distribution of braking force and avoid uneven wear of the brake disc. At the same time, the symmetrical arrangement of the caliper brakes 2 can reduce the problem of uneven bearing force caused by unilateral braking and avoid the risk of deformation caused by excessive clamping force of the caliper on one side, which is especially suitable for the high inertia load of large-tonnage mining vehicles.

[0040] In other possible implementations, the matching caliper brake 2 and drive mechanism 3 can be configured as other multiple sets, such as three or four sets. Multiple sets of caliper brakes 2 and drive mechanisms 3 are evenly distributed circumferentially relative to the parking brake disc 1, which can also avoid uneven wear of the brake disc.

[0041] Alternatively, in other possible implementations, the parking brake device 10 can also be located on the power transmission path between the drive shaft 40 and the drive motor 50, which can also amplify the braking torque of the parking brake device 10 based on the inherent speed ratio of the main reducer 20. Further details will not be elaborated here.

[0042] In addition to the aforementioned parking brake device 10 for mining vehicles, this application also provides a mining vehicle that employs the parking brake device 10 as described above. It should be understood that other functional components of this mining vehicle are not the core inventive point of this application, and can be implemented by those skilled in the art using existing technology; therefore, they will not be elaborated upon herein.

[0043] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A parking brake device for a mining vehicle, characterized in that, The parking brake device is located upstream of the power transmission path of the main reducer of the mining vehicle. The parking brake device includes a parking brake disc, a caliper brake, and a drive mechanism. The parking brake disc is fixed on the power input path of the main reducer. The caliper brake is fixed to the side of the parking brake disc, and the disc surface of the parking brake disc is located in the jaws of the caliper brake. The drive mechanism is fixedly connected to the caliper brake and is used to apply pressure to the caliper brake to clamp the parking brake disc.

2. The parking brake device for mining vehicles according to claim 1, characterized in that, The parking brake disc is fixed to the input flange of the main reducer, and the caliper brake is fixed to the housing on the input side of the main reducer.

3. The parking brake device for mining vehicles according to claim 2, characterized in that, The parking brake device also includes a fixed bracket, which is fixedly mounted on the housing on the input end side of the main reducer, and the caliper brake is fixedly mounted on the fixed bracket.

4. The parking brake device for mining vehicles according to claim 3, characterized in that, The fixed bracket is welded and fixed to the housing on the input end side of the main reducer, and the caliper brake is fixed to the fixed bracket by threaded fasteners.

5. The parking brake device for a mining vehicle according to any one of claims 1 to 4, characterized in that, The caliper brake and the drive mechanism are configured in multiple sets and are evenly distributed circumferentially relative to the parking brake disc.

6. The parking brake device for mining vehicles according to claim 5, characterized in that, The caliper brake and the drive mechanism are configured in two sets and are arranged symmetrically with respect to the parking brake disc.

7. The parking brake device for a mining vehicle according to any one of claims 1 to 4, characterized in that, The drive mechanism is a hydraulic drive mechanism.

8. The parking brake device for a mining vehicle according to any one of claims 1 to 4, characterized in that, The caliper brake has a friction pad embedded inside the caliper jaws, and the friction pad is made of friction material.

9. A mining vehicle, characterized in that, The mining vehicle adopts the parking brake device of any one of claims 1 to 8.

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