Mounting structure for parking brake and vehicle

Abstract

The utility model provides a parking brake mounting structure and a vehicle, and belongs to the technical field of automobile braking, the parking brake mounting structure comprises a speed reducer and a brake, the speed reducer comprises a speed reducer shell and a speed reduction transmission shaft, and the speed reduction transmission shaft extends out of the speed reducer shell; the brake is arranged on the speed reducer shell and comprises a brake drum and a shoe arranged corresponding to the brake drum, the shoe is connected with the speed reducer shell and provided with a releasing position and a clamping position, the brake drum is connected with the speed reduction transmission shaft, and when the shoe is located at the releasing position, the brake drum is connected with the speed reduction transmission shaft. The shoe and the brake drum are arranged in a spaced mode, and when the shoe is located at the clamping position, the shoe is tightly attached to the brake drum. The speed reduction transmission shaft extending out of the speed reducer shell is braked, and the brake is arranged on the speed reducer shell, so that a vehicle can be effectively braked. Meanwhile, the parking brake and the driving brake are independently arranged at different positions of the vehicle, so that the safety of the vehicle is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of vehicle braking, and particularly relates to an installation structure of a parking brake and a vehicle. Background Art

[0002] When the total mass of a vehicle is large, a central brake is usually adopted to realize parking braking. When the vehicle is driven by a direct drive of a transmission shaft, the central brake can be connected in series on the transmission shaft. However, when the vehicle adopts an electric drive axle, there is no transmission shaft between the motor and the drive axle, so the traditional central brake is difficult to use. At present, wheel-end braking is usually adopted to realize parking braking.

[0003] Compared with central braking, the rotation effect of wheel-end braking is weak, and it is difficult to meet the performance requirements of vehicles with a large total mass. In addition, wheel-end braking needs to distribute the actuating force of the handbrake cable, which requires additional mechanical structures, thus affecting the consistency of braking performance and putting forward higher requirements for the rationality of the overall vehicle layout space. Moreover, wheel-end braking usually shares a set of braking systems with service braking. If the above braking system fails, the parking braking and service braking may fail simultaneously, posing a safety hazard. Summary of the Utility Model

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present utility model is to provide an installation structure of a parking brake and a vehicle, which is used to solve the problems such as easy occurrence of safety accidents when wheel-end braking and service braking share a set of brakes in the prior art.

[0005] To achieve the above purpose and other related purposes, the present utility model provides a parking brake, including:

[0006] A speed reducer, including a speed reducer housing and a reduction drive shaft, and the reduction drive shaft extends out of the speed reducer housing;

[0007] A brake, disposed on the speed reducer housing, the brake including a brake drum and brake shoes corresponding to the brake drum, the brake shoes being connected to the speed reducer housing, the brake shoes having an open position and a clamping position, and the brake drum being connected to the reduction drive shaft,

[0008] wherein, when the brake shoes are in the open position, a gap is provided between the brake shoes and the brake drum, and when the brake shoes are in the clamping position, the brake shoes are in close contact with the brake drum.

[0009] Optionally, the brake further includes a flange, and the brake drum is connected to the reduction drive shaft through the flange.

[0010] Optionally, the flange and the reduction drive shaft are connected through internal and external splines.

[0011] Optionally, an extension hole for extending the reduction drive shaft is provided on the reducer housing, and an oil seal is provided between the extension hole and the reduction drive shaft.

[0012] Optionally, there are two brake shoes, and the two brake shoes are symmetrically arranged corresponding to the brake drum.

[0013] Optionally, the brake further includes a linkage assembly for driving the two brake shoes to move together. The linkage assembly includes a driving member, a paddle, and a connecting rod. The paddle is strip-shaped. One end of the paddle is connected to the driving member, and the other end of the paddle is connected to one of the brake shoes. One end of the connecting rod is arranged between the two ends of the brake shoe connected to the paddle among the two brake shoes, and the other end of the connecting rod abuts against the other brake shoe among the two brake shoes.

[0014] Optionally, the driving member is a cable. One end of the cable is arranged on the paddle, and the other end of the cable is arranged on a controller for pulling or releasing the cable.

[0015] Optionally, the brake further includes a bottom plate and a self-adjusting rod arranged on the bottom plate. The bottom plate is arranged on the reducer housing, and the self-adjusting rod is used to adjust the distance between each brake shoe and the brake drum.

[0016] Optionally, a resilient member is arranged between the two brake shoes, and the two brake shoes approach each other under the action of the resilient member.

[0017] A vehicle of the present invention includes the installation structure of the parking brake as described above.

[0018] As described above, an installation structure of a parking brake and a vehicle of the present invention have the following beneficial effects:

[0019] By braking the reduction drive shaft extending from the reducer housing and arranging the brake on the reducer housing, the vehicle can be effectively braked. At the same time, the parking brake and the service brake are independently arranged at different positions of the vehicle, which can increase the safety and applicability of the vehicle braking system. When one of the parking brakes fails, the other parking brake can be used for parking operations. Moreover, the installation structure of this parking brake is simple, safe and reliable. At the same time, the brake is arranged outside the reducer housing, which can avoid the debris during the braking process of the brake from affecting the normal operation of the reducer. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the installation structure of the parking brake according to an embodiment of the present invention.

[0021] Figure 2Explosion diagram of the installation structure of the parking brake according to an embodiment of the present utility model.

[0022] Figure 3 Schematic side view of the installation structure of the parking brake according to an embodiment of the present utility model.

[0023] Figure 4 Schematic cross-sectional view of the installation structure of the parking brake according to an embodiment of the present utility model.

[0024] Figure 5 Schematic diagram of the structure of the brake according to an embodiment of the present utility model.

[0025] Reference numerals: 1, motor; 2, second transmission gear; 3, first transmission gear; 4, reducer housing; 5, first shaft; 6, second shaft; 7, brake; 8, third transmission gear; 9, third shaft; 10, fourth transmission gear; 11, wheel; 12, external spline; 13, flange; 14, gasket; 15, lock nut; 16, bottom plate; 17, brake drum; 18, brake shoe; 19, fixing bolt; 20, fixing nut; 21, oil seal; 22, paddle; 23, connecting pin; 24, connecting rod; 25, self-adjusting rod; 26, return spring. Detailed implementation manners

[0026] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification.

[0027] Please refer to Figures 1 to 5 Note that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope that can be covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope that the present utility model can implement.

[0028] In order to be able to describe the present utility model in detail, first, a specific description of an installation structure of a parking brake of the present utility model will be given as follows:

[0029] Please refer to Figures 1 to 4As shown in the figure, the present utility model provides an installation structure for parking brake, which includes a reducer and a brake 7. The reducer includes a reducer housing 4 and a reduction drive shaft that extends out of the reducer housing 4. The brake 7 is disposed on the reducer housing 4. The brake 7 includes a brake drum 17 and a brake shoe 18 corresponding to the brake drum 17. The brake shoe 18 is connected to the reducer housing 4. The brake shoe 18 has a release position and a clamping position. The brake drum 17 is connected to the reduction drive shaft. Wherein, when the brake shoe 18 is in the release position, a gap is provided between the brake shoe 18 and the brake drum 17. When the brake shoe 18 is in the clamping position, the brake shoe 18 closely adheres to the brake drum 17. By braking the reduction drive shaft extending out of the reducer housing 4 and disposing the brake 7 on the reducer housing 4, the vehicle can be effectively braked. At the same time, the parking brake and the service brake are independently disposed at different positions of the vehicle, which can increase the safety and applicability of the vehicle braking system. When one of the parking brakes fails, the other parking brake can be used for parking operation. And the installation structure of this parking brake is simple in structure, safe and reliable. The brake 7 includes a base plate 16. The brake shoe 18 of the brake 7 is connected to the base plate 16 through a connecting pin 23. The base plate 16 is disposed on the reducer housing 4.

[0030] It should be noted here that in this embodiment, the reducer housing 4 encloses all the drive shafts other than the gears and the reduction drive shaft inside the reducer. The reducer is a two-stage reducer, which includes a first shaft 5, a second shaft 6 and a third shaft 9. The motor 1 is connected to the first shaft 5. A first transmission gear 3 is disposed on the first shaft 5. In this embodiment, the reduction drive shaft is the second shaft 6. A second transmission gear 2 and a third transmission gear 8 are disposed on the second shaft 6. The second transmission gear 2 meshes with the first transmission gear 3. A fourth transmission gear 10 is disposed on the third shaft 9. The fourth transmission gear 10 meshes with the third transmission gear 8. The third shaft 9 is the output shaft of the vehicle in this embodiment and is connected to the wheel 11.

[0031] Wherein, the brake 7 further includes a flange 13. The brake drum 17 is connected to the reduction drive shaft through the flange 13. The brake drum 17 is connected to the reducer drive shaft through the flange 13, which has a simple structure, good connection effect, and is convenient for inspection and maintenance.

[0032] Wherein, the flange 13 and the reduction drive shaft are connected through internal and external splines. The spline connection has high bearing capacity, high centering accuracy and good guiding performance. In this embodiment, an external spline 12 matching the flange is disposed on the reduction drive shaft, and an internal spline corresponding to the above external spline 12 is also disposed on the flange 13. In some embodiments, the flange 13 and the reduction drive shaft are adhered with glue. The connection method between the flange 13 and the reduction drive shaft can be adjusted according to actual needs.

[0033] In this embodiment, the reduction transmission shaft is provided with a limiting step arranged along the circumference of the reduction transmission shaft, a gasket 14 is provided at the limiting step, and the flange 13 is firmly connected to the reduction transmission shaft through the limiting nut 15 cooperating with the external thread on the reduction transmission shaft. The brake drum is firmly connected to the flange 13 through the fixing bolt 19 and the fixing nut 20.

[0034] Specifically, the reducer housing 4 is provided with an extension hole for extending the reduction transmission shaft, and an oil seal 21 is provided between the extension hole and the reduction transmission shaft. The oil seal 21 seals the extension hole to prevent the lubricating oil inside the reducer from leaking, and can also prevent dust and impurities outside the reducer from entering the reducer to affect the normal operation of the reducer.

[0035] Among them, the shoe 18 is two pieces, and the two shoe pieces 18 are symmetrically arranged corresponding to the brake drum 17. The two shoe pieces 18 can increase the contact surface between the brake drum 17, thereby increasing the friction force and enhancing the braking effect of the brake 7.

[0036] like Figure 5 As shown, specifically, the brake 7 also includes a linkage assembly, which is used to drive the two shoes 18 to move together. The linkage assembly includes a driving member, a paddle 22 and a connecting rod 24. The paddle 22 is in a long strip shape, one end of the paddle 22 is connected to the driving member, and the other end of the paddle 22 is connected to a shoe 18. One end of the connecting rod 24 is arranged between the two ends of the shoe connected to the paddle 22, and the other end of the connecting rod 24 is in contact with the other shoe 18 of the two shoes 18. In this embodiment, the driving member is a cable, one end of the cable is arranged on the paddle 22, and the other end of the cable is arranged on the controller, and the controller is used to pull or release the cable. The braking principle of the brake 7 is as follows:

[0037] When the controller pulls the cable, the cable drives one end of the shoe 18 to move through the paddle 22. At the same time, since the middle part of the shoe 18 is connected to one end of the connecting rod 24, the shoe 18 uses the part that abuts the connecting rod as a fulcrum. When one end of the shoe 18 moves under the drive of the paddle 22, the other end of the shoe 18 moves in the opposite direction, so that the shoe 18 contacts the brake drum 17 to generate friction and trigger the brake. The other shoe 18 is pushed to contact the brake drum 17 through the connecting rod 24 to generate friction, so that the two shoes 18 trigger the brake at the same time. In this embodiment, a rebound member 26 is provided between the two shoes 18, and the two shoes 18 approach each other under the action of the rebound member 26, and the rebound member 26 is a torsion spring. When the controller releases the cable, the two shoes 18 approach each other under the drive of the torsion spring, and leave the brake drum 17, releasing the brake. By arranging the resilient member 26 between the two shoe pieces 18, the two shoe pieces 18 can automatically return to their original positions after the braking contact, waiting for the triggering of the next braking. The structure in the brake 7 is simple, and it is convenient to install and assemble.

[0038] Specifically, the brake 7 further includes a bottom plate 16 and a self-adjusting rod 25 disposed on the bottom plate 16. The bottom plate 16 is disposed on the reducer housing 4, and the self-adjusting rod 25 is used to adjust the distance between each brake shoe 18 and the brake drum 17. By providing the self-adjusting rod 25, a reasonable distance can still be maintained between the brake shoe 18 and the brake drum 17 after multiple frictional losses between the brake shoe 18 and the brake drum 17, ensuring the braking effect of the brake 7.

[0039] The present utility model further provides a vehicle, including the mounting structure for the parking brake as described above.

[0040] In summary, by braking the reduction transmission shaft extending from the reducer housing 4 and disposing the brake 7 on the reducer housing 4, the vehicle can be effectively braked. At the same time, the parking brake and the service brake are independently disposed at different positions of the vehicle, which can increase the safety and applicability of the vehicle braking system. When one of the parking brakes fails, the other parking brake can be used for parking operations. Moreover, the mounting structure of the present parking brake is simple in structure, safe and reliable.

[0041] The above embodiments are only illustrative of the principles and effects of the present utility model, and are not intended to limit the present utility model. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present utility model. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present utility model should still be covered by the claims of the present utility model.

Claims

1. An installation structure of a parking brake, characterized in that, include: A reducer, comprising a reducer housing and a reduction transmission shaft, wherein the reduction transmission shaft extends out of the reducer housing; The brake is arranged on the reducer housing, the brake comprises a brake drum and a shoe arranged corresponding to the brake drum, the shoe is connected to the reducer housing, the shoe has a release position and a clamping position, and the brake drum is connected to the reduction transmission shaft. Wherein, when the shoe is located at the releasing position, the shoe and the brake drum are spaced apart, and when the shoe is located at the clamping position, the shoe is in close contact with the brake drum.

2. The installation structure of the parking brake according to claim 1, wherein: The brake further comprises a flange, and the brake drum is connected to the reduction transmission shaft via the flange.

3. The installation structure of the parking brake according to claim 2, characterized in that: The flange is connected to the reduction transmission shaft via internal and external splines.

4. The installation structure of the parking brake according to claim 1, characterized in that: The reducer housing is provided with a protruding hole for protruding the reduction transmission shaft, and an oil seal is provided between the protruding hole and the reduction transmission shaft.

5. The installation structure of the parking brake according to claim 1, characterized in that: The shoe plates are two in number, and the two shoe plates are symmetrically arranged corresponding to the brake drum.

6. The installation structure of the parking brake according to claim 5, characterized in that: The brake also includes a linkage component, which is used to drive the two shoes to move together. The linkage component includes a driving member, a paddle and a connecting rod. The paddle is in a long strip shape, one end of the paddle is connected to the driving member, and the other end of the paddle is connected to one of the shoes. One end of the connecting rod is arranged between the two ends of the shoe connected to the paddle, and the other end of the connecting rod is in contact with the other shoe of the two shoes.

7. The installation structure of the parking brake according to claim 6, characterized in that: The driving member is a cable, one end of which is arranged on the paddle, and the other end of which is arranged on a controller, and the controller is used to pull or release the cable.

8. The installation structure of the parking brake according to claim 4, characterized in that: The brake also includes a bottom plate and a self-adjusting rod arranged on the bottom plate. The bottom plate is arranged on the reducer housing. The self-adjusting rod is used to adjust the distance between each shoe and the brake drum.

9. The installation structure of the parking brake according to claim 4, characterized in that: A resilient member is arranged between the two shoe plates, and the two shoe plates are moved closer to each other under the action of the resilient member.

10. A vehicle, characterized in that, The invention comprises a parking brake installation structure as claimed in any one of claims 1 to 9.

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