Wheel brake test bench and test method thereof

Abstract

The invention provides a wheel brake test bench and a test method thereof, the wheel brake test bench comprises an assembling unit (1), the assembling unit (1) is used for assembling a wheel assembly (5) with an independent suspension, and the wheel assembly (5) comprises a wheel and a brake; the driving unit (2) can make contact with or be separated from the wheels in a front-back sliding mode, and when the driving unit (2) makes contact with the wheels, the wheels can be driven to rotate; the braking unit (3) is used for braking the wheels; and the control unit (4) is used for controlling the driving unit (2) to move and monitoring the state information of the wheel assembly (5). By the adoption of the technical scheme, the brake performance can be pre-evaluated, the brake problem can be found in advance, and therefore the risk in the road test process is effectively reduced, and the application prospect is wide.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of brake detection, more particularly, to a wheel brake test bench and a test method thereof. BACKGROUND

[0002] For any vehicle, driving safety is the top priority. Brake performance, as a core parameter affecting driving safety, is directly related to the safety of passengers' life and property, so it is crucial to detect the brake performance of vehicles before they are put into the market.

[0003] A motor home is a special vehicle that combines driving and living, and a towed motor home is a type of motor home that has no power and needs to be towed by a towing vehicle. The brake performance of a towed motor home is generally tested by road testing, which has the following defects: on the one hand, because the brake performance cannot be pre-evaluated, the road test process is dangerous; on the other hand, road testing is a comprehensive test of brake performance, and it is difficult to locate the source of the problem after a problem occurs.

[0004] In view of the above, it is urgent to develop a wheel brake test bench to solve the above technical problems. SUMMARY

[0005] Therefore, the present application provides a wheel brake test bench, which can at least partially solve the problems in the prior art. In order to achieve the above purpose, the technical scheme adopted by the present application is as follows: A wheel brake test bench, characterized in that it comprises: an assembly unit for assembling a wheel assembly with independent suspension, the wheel assembly comprising a wheel and a brake; a drive unit capable of contacting or separating from the wheel by sliding forward and backward, the drive unit being capable of driving the wheel to rotate when the drive unit contacts the wheel; a brake unit for braking the wheel; and a control unit for controlling the movement of the drive unit and monitoring the state information of the wheel assembly.

[0006] Further, the assembly unit comprises a first frame, a first mounting, a second mounting and a support, the first mounting is arranged on one side of the top of the first frame, the second mounting is arranged on the other side of the top of the first frame, and the support is located between the first mounting and the second mounting; the independent suspension can be mounted on the first frame through the first mounting and the second mounting.

[0007] Further, one end of the cantilever is mounted on the first mounting; the second mounting comprises a fixed part and a movable part, the fixed part is fixedly connected to the first frame, the fixed part comprises two fixed plates, each of the fixed plates is provided with a circular hole; the movable part comprises two movable plates, each of the movable plates is provided with a waist-shaped hole and a circular hole, the movable part is connected with the fixed part through the circular hole on the movable part, the other end of the cantilever is mounted on the movable part of the second mounting through the waist-shaped hole. Or, Further, one end of the cantilever is mounted on the first mounting; the second mounting comprises a fixed part and a movable part, the fixed part is fixedly connected to the first frame, the fixed part comprises two fixed plates, each of the fixed plates is provided with a circular hole; the movable part comprises two movable plates, each of the movable plates is provided with a waist-shaped hole and a circular hole, the movable part is connected with the fixed part through the circular hole on the movable part, the other end of the cantilever is mounted on the movable part of the second mounting through the waist-shaped hole.

[0008] Further, the driving unit comprises a second frame, a first driving part, a second driving part and a sliding mechanism, the second frame is mounted on one side of the first frame, the first driving part is slidably connected to the top of the second frame through the sliding mechanism, and the second driving part is mounted on the second frame and can drive the first driving part to slide back and forth relative to the second frame.

[0009] Further, the first driving part comprises a driving motor and a driving wheel, the driving wheel is fixedly connected with a motor shaft of the driving motor; the driving unit drives the wheel to rotate through the driving wheel.

[0010] Further, the assembling unit and the driving unit are both two groups and are symmetrically arranged left and right.

[0011] Further, the brake unit comprises a third frame, a hand brake and a hand brake pull wire, the third frame is mounted on the other side of the first frame, the hand brake is mounted on the top of the third frame, and the hand brake pull wire is connected with the hand brake and the brake.

[0012] Further, the third frame comprises an adjusting rod and a plurality of adjusting rings, the adjusting rod is provided with a plurality of adjusting holes, the adjusting holes are used for adjusting the mounting position of the hand brake, and the adjusting rings are used for adjusting the working length of the hand brake pull wire.

[0013] Further, the control unit comprises a wheel speed sensor and a temperature sensor, and the state information of the wheel assembly comprises the rotating speed of the wheel and the temperature of the brake.

[0014] The application also provides a method for brake test using the wheel brake test bench, comprising the following steps: mounting the wheel assembly with independent suspension: mounting the wheel assembly with independent suspension on the assembly unit; controlling the rotation speed of the wheel: controlling the driving unit to contact the wheel and drive the wheel to rotate to a preset rotation speed through the control unit; braking and evaluating the braking performance: making the driving unit disengage from the wheel, applying a braking force to the wheel through the braking unit, monitoring and recording the state information of the wheel assembly through the control unit to evaluate the braking performance of the brake.

[0015] Compared with the prior art, the present application has the following obvious advantages: 1. The braking performance is pre-evaluated through the test bench, reducing the risk of road test process; 2. Modular design is adopted, the structure is simple, disassembly and assembly are convenient, and the performance is reliable. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a schematic view of the overall structure of the wheel brake test bench of the present application; Figure 2 It is a schematic view of the wheel assembly with independent suspension mounted on the assembly unit of the present application; Figure 3 It is a schematic view of the structure of the assembly unit of the present application; Figure 4 It is a schematic view of the structure of the driving unit of the present application; Figure 5 It is a schematic view of the structure of the driving unit of the present application from another perspective; Figure 6 It is a schematic view of the structure of the braking unit of the present application; Figure 7 It is a schematic view of the structure of the braking unit of the present application from another perspective; Figure 8 It is a schematic view of the structure of the control unit of the present application; Figure 9 It is a schematic view of the structure of the control unit of the present application from another perspective; Figure 7 It is a schematic view of the structure of the control unit of the present application from another perspective; Figure 10 It is a schematic view of the structure of the control unit of the present application from another perspective; Figure 11 Figure 10 It is a schematic view of the structure of the second mounting member in the present application.

[0017] REFERENCE NUMERALS: assembly unit, 11, first frame, 12, first mounting member, 13, second mounting member, 131, fixing member, 132, movable member, 133, sliding part, 134, connecting part, 14, supporting member; ​2. Drive unit; 21. Second frame; 22. First drive part; 221. Drive motor; 222. Drive wheel; 23. Second drive part; 231. Fixed part; 232. Telescopic part; 24. Sliding mechanism; 241. Slide plate; 242. Slide rail. 3. Braking unit; 31. Third frame; 311. Adjusting rod; 312. Adjusting ring; 32. Handbrake; 33. Handbrake cable; 4. Control unit; 5. Wheel assembly with independent suspension. Detailed Implementation

[0018] Embodiments of the present invention are described in detail below. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0019] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0020] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0021] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. Example 1

[0022] like Figures 1 to 9 As shown, a wheel braking test bench includes: an assembly unit 1 for assembling a wheel assembly 5 with independent suspension, wherein the wheel assembly 5 includes a wheel and a brake; a drive unit 2, which can contact or separate from the wheel by sliding back and forth, and can drive the wheel to rotate when in contact with the wheel; a braking unit 3 for braking the wheel; and a control unit 4 for controlling the movement of the drive unit 2 and monitoring the status information of the wheel assembly 5.

[0023] The assembling unit 1 comprises a first frame 11, a first mounting member 12, a second mounting member 13 and a support member 14. The first mounting member 12 is arranged on one side of the top of the first frame 11, and the second mounting member 13 is arranged on the other side of the top of the first frame 11. The first mounting member 12 is arranged opposite to the second mounting member 13. The support member 14 is arranged on the top of the first frame 11 and between the first mounting member 12 and the second mounting member 13, which can provide auxiliary support when mounting the cantilever, save manpower and make operation more convenient. The cantilever can be mounted on the first frame 11 through the first mounting member 12 and the second mounting member 13.

[0024] Preferably, the second mounting member 13 comprises a fixed member 131 and a movable member 132. The fixed member 131 is fixedly connected to one side of the top of the first frame 11, and the movable member 132 is movably connected to the fixed member 131.

[0025] As a further preferred embodiment, the fixed member 131 is two fixed plates, and the movable member 132 is two movable plates. A round hole is arranged on each fixed plate 131, and a waist-shaped hole and a round hole are arranged on each movable plate 132. Each movable plate 132 is rotatably connected to the corresponding fixed plate 131 through the corresponding round hole. The movable member 132 can swing relative to the fixed member 131, so as to adjust the distance between the movable member 132 and the second mounting member 13, and the waist-shaped hole can be used to adapt to cantilevers of different lengths.

[0026] Through the above arrangement, first, the movable plates 132 are mounted on the fixed plates 131 by using bolts or pins to pass through the round holes on the movable plates 132 and the fixed plates 131. When mounting the cantilever, first, one end of the cantilever is mounted on the first mounting member 12 by using bolts or pins, and then the cantilever is leaned on the support member 14. The position of the movable plates 132 is adjusted according to the length of the cantilever. Subsequently, the bolts or pins are sequentially passed through the waist-shaped hole on one movable plate 132, the other end of the cantilever and the waist-shaped hole on the other movable plate 132, so as to complete the mounting of the cantilever. Finally, the wheel assembly 5 can be assembled according to the normal process.

[0027] For the A-shaped cantilever, the other end of the cantilever has two fork arms. The above arrangement only needs to support one of the fork arms. If it is desired to further improve the stability of the structure, a second mounting member 13 can be additionally arranged to support the other fork arm in the same way. In addition, if the length of the cantilever exceeds the current adaptation range, different movable members 132 can be replaced to enhance the adaptability.

[0028] The driving unit 2 comprises a second frame 21, a first driving part 22, a second driving part 23 and a sliding mechanism 24. The second frame 21 is mounted on one side of the first frame 11, the first driving part 22 is slidingly connected to the top of the second frame 21 through the sliding mechanism 24, and the second driving part 23 is arranged at one end of the top of the second frame 21. The second driving part 23 can drive the first driving part 22 to slide forward and backward relative to the second frame 21.

[0029] Further, the first driving part 22 comprises a driving motor 221 and a driving wheel 222. The driving wheel 222 is fixedly connected to the motor shaft of the driving motor 221. The driving unit 2 drives the rotation of the wheel through the driving wheel 222. Further, the sliding mechanism 24 comprises a sliding plate 241 and a sliding rail 242. The sliding plate 241 can slide forward and backward along the sliding rail 242. The sliding plate 241 is fixedly connected to the bottom of the driving motor 221. The sliding rail 242 is fixedly connected to the top of the second frame 21.

[0030] Further, the second driving part 23 comprises a fixed part 231 and an extension part 232. The fixed part 231 is fixedly connected to one end of the second frame 21. The end of the extension part 232 is fixedly connected to the driving motor 221. The second driving part 23 preferably adopts an electric push rod.

[0031] As a preferred embodiment, the assembling unit 1 and the driving unit 2 are both two groups and are arranged symmetrically left and right. This is closer to the real use scenario and improves the accuracy of the test results.

[0032] Through the above arrangement, the first driving part 22 is driven to slide forward and backward by the second driving part 23. The contact or disengagement of the driving wheel 222 and the wheel can be achieved. When the driving wheel 222 and the wheel are in contact, the wheel can be driven to rotate.

[0033] The brake unit 3 comprises a third frame 31, a hand brake 32 and a hand brake pull wire 33. The third frame 31 is mounted on the other side of the first frame 11. The hand brake 32 is arranged on the top of the third frame 31. The hand brake pull wire 33 is connected to the brake of the wheel assembly 5. The hand brake pull wire 33 is pulled by the hand brake 32 to drive the brake to generate a braking force, so as to brake the wheel.

[0034] As a preferred embodiment, the third frame 31 comprises an adjusting rod 311 and a plurality of adjusting rings 312. The adjusting rod 311 is arranged on the top of the third frame 31 and extends in the forward and backward direction. A plurality of adjusting holes are formed in the adjusting rod 311. The hand brake 32 is mounted on the adjusting rod 311 through the adjusting holes. The adjusting rings 312 are used to mount the hand brake pull wire 33.

[0035] Through the above arrangement, the hand brake 32 can be mounted at different positions of the adjusting rod 311 through the adjusting holes. The hand brake pull wire 33 can be adjusted in working length by passing through different adjusting rings 312, such as Figure 7As shown, when the handbrake cable 33 is relatively long, the handbrake 32 can be installed in a relatively forward position. In this case, the handbrake cable 33 passes through more adjusting rings 312 to complete the installation of the handbrake cable 33. When the handbrake cable 33 is relatively short, the handbrake 32 can be installed in a relatively rearward position. In this case, the handbrake cable 33 passes through fewer adjusting rings 312 to complete the installation of the handbrake cable 33. Using this setting, the number of adjusting rings passed through can ensure that the handbrake cable is always in the working state (i.e., in the straightened state).

[0036] The control unit 4 includes wheel speed sensors and temperature sensors, and the status information of the wheel assembly 5 includes the wheel speed and the temperature of the brakes. Example 2

[0037] The similarities with Example 1 will not be repeated here. For example... Figure 10 , Figure 11 As shown, in this embodiment, the second mounting component 13 includes a sliding part 133 and a connecting part 134 provided on the sliding part 133. A waist-shaped hole is provided on one side of the top of the first frame 11. The sliding part 133 is detachably connected to the first frame 11 through the waist-shaped hole and can slide left and right along the waist-shaped hole to adapt to the change of the structural position of the other end of the cantilever. A waist-shaped hole is provided on the connecting part 134 to connect and install with the other end of the cantilever. The waist-shaped hole can adapt to the assembly of cantilevers of different lengths.

[0038] The aforementioned wheel brake test bench can be used in combination with different modules to perform various tests, including: 1. Preliminary braking performance test: Using assembly unit 1 and braking unit 3 together, after assembling the wheel assembly 5 with independent suspension using assembly unit 1, install handbrake 32 and connect handbrake 32 and the brake of wheel assembly 5 through handbrake cable 33; tighten handbrake, manually turn the wheel and observe whether the wheel rotates. If it can rotate, it indicates that there is a problem with the assembly or the parts do not meet the requirements.

[0039] 2. Brake drag test: Using assembly unit 1, drive unit 2 and control unit 4 in combination, after assembling the wheel assembly 5 with independent suspension using assembly unit 1, start drive motor 221 of drive unit 2 to drive the wheel to rotate at a preset speed for a preset time, without braking the wheel; monitor the temperature of the brake through control unit 4 to evaluate whether there is brake drag.

[0040] 3. Comprehensive Braking Performance Test: Using assembly unit 1, drive unit 2, braking unit 3, and control unit 4 in combination, operate according to the following steps: Install the wheel assembly with independent suspension: Install the wheel assembly 5 with independent suspension onto the assembly unit 1. Controlling the rotation speed of the wheel: start the second driving part 23 of the driving unit 2, drive the driving motor 221 of the first driving part 22 to slide along the sliding mechanism 24 to approach the wheel assembly 5 until the driving wheel 222 contacts the wheel, and start the driving motor 221 to drive the wheel to a preset rotation speed; Braking and evaluating the braking performance: drive the driving motor 221 of the first driving part 22 to slide away from the wheel assembly 5 by the second driving part 23 until the driving wheel 222 is separated from the wheel; pull up the hand brake 32 to apply a braking force to the wheel, monitor and record the rotation speed information of the wheel by the control unit 4 to evaluate the braking performance of the brake.

[0041] The above embodiments only illustrate the basic principles and characteristics of the present application, and the present application is not limited by the above embodiments. Various changes and modifications can be made without departing from the spirit and scope of the present application, and these changes and modifications all fall within the scope of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A wheel brake test bench, characterized in that, The wheel brake test bench comprises: an assembling unit (1) for assembling a wheel assembly (5) with a suspension, the wheel assembly (5) comprising a wheel and a brake; a driving unit (2) capable of contacting or separating from the wheel by sliding forward and backward, and capable of driving the wheel to rotate when the driving unit (2) contacts the wheel; a braking unit (3) for braking the wheel; a control unit (4) for controlling the movement of the driving unit (2) and monitoring the state information of the wheel assembly (5).

2. The wheel brake test bench according to claim 1, wherein: the assembling unit (1) comprises a first frame (11), a first mounting member (12), a second mounting member (13) and a support member (14), the first mounting member (12) is arranged on one side of the top of the first frame (11), the second mounting member (13) is arranged on the other side of the top of the first frame (11), and the support member (14) is located between the first mounting member (12) and the second mounting member (13); the suspension is mounted on the first frame (11) through the first mounting member (12) and the second mounting member (13).

3. The wheel brake test bench according to claim 2, wherein: one end of the suspension is mounted on the first mounting member (12); the second mounting member (13) comprises a fixed member (131) and a movable member (132), the fixed member (131) is fixedly connected to the first frame (11), the fixed member (131) comprises two fixed plates, each of which is provided with a circular hole; the movable member (132) comprises two movable plates, each of which is provided with a waist-shaped hole and a circular hole, the movable member (132) is connected to the fixed member (131) through the circular hole thereon, and the other end of the suspension is mounted on the movable member (132) of the second mounting member (13) through the waist-shaped hole; or, one end of the suspension is mounted on the first mounting member (12); the second mounting member (13) comprises a sliding part (133) and a connecting part (134) arranged on the sliding part (133), the sliding part (133) is detachably connected to the first frame (11) and can slide left and right along the first frame (11), and the connecting part (134) is provided with a waist-shaped hole, and the other end of the suspension is mounted on the connecting part (134) of the second mounting member (13) through the waist-shaped hole.

4. The wheel brake test bench according to claim 2, wherein: The driving unit (2) comprises a second frame (21), a first driving part (22), a second driving part (23) and a sliding mechanism (24), the second frame (21) is installed on one side of the first frame (11), the first driving part (22) is slidably connected to the top of the second frame (21) through the sliding mechanism (24), and the second driving part (23) is installed on the second frame (21) and can drive the first driving part (22) to slide forward and backward relative to the second frame (21).

5. The wheel brake test bench according to claim 4, characterized in that, The first driving part (22) comprises a driving motor (221) and a driving wheel (222), and the driving wheel (222) is fixedly connected with a motor shaft of the driving motor (221). The driving unit (2) drives the wheel to rotate through the driving wheel (222).

6. The wheel brake test bench according to claim 4, characterized in that, The assembly unit (1) and the driving unit (2) are both two groups and are symmetrically arranged left and right.

7. The wheel brake test bench according to claim 4, characterized in that, The brake unit (3) comprises a third frame (31), a hand brake (32) and a hand brake pull wire (33), the third frame (31) is installed on the other side of the first frame (11), the hand brake (32) is installed on the top of the third frame (31), and the hand brake pull wire (33) is connected with the hand brake (32) and the brake.

8. The wheel brake test bench according to claim 7, characterized in that, The third frame (31) comprises an adjusting rod (311) and a plurality of adjusting rings (312), a plurality of adjusting holes are formed in the adjusting rod (311), the adjusting holes are used for adjusting the installation position of the hand brake (32), and the adjusting rings (312) are used for adjusting the working length of the hand brake pull wire (33).

9. The wheel brake test bench according to any one of claims 1-8, characterized in that, The control unit (4) comprises a wheel speed sensor and a temperature sensor, and the state information of the wheel assembly (5) comprises the rotating speed of the wheel and the temperature of the brake.

10. A test method for wheel braking, comprising a wheel brake test bench as claimed in any one of claims 1-9, characterized in that, The method comprises the following steps: installing the wheel assembly (5) with independent suspension: installing the wheel assembly (5) with independent suspension on the assembly unit (1); controlling the wheel rotating speed: controlling the driving unit (2) to contact the wheel and drive the wheel to rotate to a preset rotating speed through the control unit (4); braking and evaluating the braking performance: making the driving unit (2) separate from the wheel, applying a braking force to the wheel through the brake unit (3), and monitoring and recording the state information of the wheel assembly (5) through the control unit (4) to evaluate the braking performance of the brake.

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