A brake detection mechanism and detection method

Abstract

The present invention relates to the field of detection, and specifically to a brake detection mechanism and a test method for an electric vehicle. The brake detection mechanism includes a frame, a triggering device, and a feedback device. The frame is used to place the electric vehicle. The triggering device is configured on the frame and is located at the brake handle of the electric vehicle to push the brake handle of the electric vehicle to actuate. The feedback device is configured on the frame. The feedback device includes a rotatable test roller, which is driven by a servo motor. The circumferential rolling surface of the test roller contacts the rolling surface of the wheel of the electric vehicle, and the movement trajectory of the test roller and the movement trajectory of the wheel of the electric vehicle are formed in the same plane. It solves the technical problem of time-consuming and laborious caused by the insufficient automation of the existing brake detection of electric vehicles.

Description

Technical Field

[0001] The present invention relates to the field of detection, and specifically to a brake detection mechanism and a detection method. Background Art

[0002] During the production process of electric vehicles, many different tests need to be carried out on them. Among them, the test of braking performance is an essential item. However, in existing tests, manual testing methods are mostly used, which are time-consuming, laborious, and inaccurate. Summary of the Invention

[0003] In order to solve the technical problems of time-consuming and laborious caused by the insufficient automation of the brake detection of existing electric vehicles, the present invention provides a solution to the above technical problems.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows:

[0005] The present invention provides a brake detection mechanism for an electric vehicle, including: a frame for placing the electric vehicle; a triggering device configured on the frame and located at the brake handle of the electric vehicle to push the brake handle of the electric vehicle to act; a feedback device configured on the frame, the feedback device including a rotatable test roller driven by a servo motor, the circumferential rolling surface of the test roller contacting the rolling surface of the wheel of the electric vehicle, and the movement trajectory of the test roller and the movement trajectory of the wheel of the electric vehicle being formed in the same plane.

[0006] Further, the triggering device includes a clamping cylinder and two clamping plates driven by the clamping cylinder. The two clamping plates clamp the handle and the brake handle of the electric vehicle. When the two clamping plates move and approach under the drive of the clamping cylinder, the brake handle is pushed to achieve the braking action.

[0007] Further, the feedback device further includes a slewing bearing module, and the slewing bearing module includes: a box body, the test roller being rotatably configured in the box body; a fixed sleeve configured on the frame; a rotating sleeve fixedly connected to the bottom of the box body and rotatably fitted on the fixed sleeve; a return spring, the first end of the return spring being connected to the box body, and the second end of the return spring being fixedly arranged relative to the box body.

[0008] Further, a first connecting plate is fixed to the bottom of the box body, and the rotating sleeve is connected to the bottom of the box body through the first connecting plate.

[0009] Further, the return spring is horizontally arranged, and the second end of the return spring is connected to the side of the first connecting piece.

[0010] Further, it further includes an adjustment module, and the adjustment module includes: a slide rail, which is fixed on the frame, and the extending direction of the slide rail is parallel to the axial direction of the test roller; a slider, which is slidably fitted on the slide rail, and the slider is fixed to the second connecting plate; a second connecting plate, the fixed sleeve is fixedly connected to the second connecting plate through a bottom plate, and the second connecting plate is connected to the first connecting plate through the fixed sleeve; an adjustment cylinder, the cylinder body of the adjustment cylinder is fixedly connected to the frame, and the driving end of the piston rod of the adjustment cylinder is connected to the second connecting plate.

[0011] Further, the adjustment module further includes a shock absorber for buffering the second connecting plate pushed out by the piston rod of the adjustment cylinder. The shock absorber is fixed on the frame through a first connecting member, and the shock head of the shock absorber faces the second connecting plate.

[0012] Further, the first end of the return spring is fixedly connected to the second connecting plate through a second connecting member.

[0013] The present invention also provides a brake test method, including: providing a frame for placing an electric vehicle; providing a feedback device configured on the frame, the feedback device includes a rotatable test roller driven by a servo motor, the circumferential rolling surface of the test roller contacts the rolling surface of the wheel of the electric vehicle, and the movement track of the test roller and the movement track of the wheel of the electric vehicle are formed in the same plane; the servo motor outputs a driving torque to drive the test roller to roll, and the driving torque is equal to the effective brake torque value provided by the manufacturer; providing a triggering device configured on the frame and located at the brake handle of the electric vehicle to push the brake handle of the electric vehicle to act; after the triggering device triggers the brake action of the electric vehicle, observing whether the test roller is braked to a stop. If the test roller is braked to a stop, the brake system of the electric vehicle is qualified.

[0014] Based on the above technical solutions, the technical effects that the present invention can achieve are:

[0015] To completely brake the moving wheels of an electric vehicle, the brake pads are required to lock the wheels. At this time, an effective braking torque will be generated on the locked wheels. The electric vehicle manufacturer needs to ensure that for each electric vehicle on the production line, the actual braking torque value on its wheels is greater than or equal to the effective braking torque value when the braking action is completed. The design principle of the braking detection mechanism in this application is to use the driving torque of the servo motor to replace the effective braking torque and compare the driving torque with the actual braking torque of each electric vehicle. Specifically, for the braking detection mechanism in this application, after placing the electric vehicle on the frame, first start the triggering device to brake the electric vehicle. After the braking action is completed and the actual braking torque value of the electric vehicle stabilizes, start the servo motor to drive the test roller on the feedback device to rotate. Here, when setting the driving torque of the servo motor, it should be ensured that the set driving torque value of the servo motor is the same as the effective braking torque value provided by the electric vehicle manufacturer. Since the circumferential rolling surface of the test roller contacts the rolling surface of the electric vehicle's wheel, and the movement trajectory of the test roller and the movement trajectory of the electric vehicle's wheel are in the same plane, the driving torque of the servo motor will act on the electric vehicle's wheel through the test roller, and the driving torque acting on the electric vehicle's wheel will counteract the actual braking torque also applied to the wheel. At this time, if the actual braking torque value is greater than or equal to the driving torque value of the servo motor, the wheels of the electric vehicle remain in the braked state, the test roller cannot rotate, and the signal of the encoder of the servo motor recognized by the detection system does not change. The detection system will determine that the braking system of the electric vehicle is qualified; if the actual braking torque value is less than the driving torque value of the servo motor, the wheels of the electric vehicle will be driven by the test roller, and the test roller is also in a rotating state. The detection system recognizes that the signal of the encoder of the servo motor changes normally and regularly, and the detection system determines that the braking system of the electric vehicle is unqualified. In summary, the braking detection mechanism in this application solves the technical problem of time-consuming and laborious caused by the insufficient automation of the braking detection of electric vehicles in the prior art.

[0016] The present invention also provides a braking test method. First, place the electric vehicle on the frame, turn on the driving motor, and the output torque value of the driving motor is the same as the effective braking torque value provided by the manufacturer. The driving motor drives the test roller to roll, and the rolling of the test roller drives the wheels of the electric vehicle to rotate. After the wheels of the electric vehicle rotate stably, use the triggering device to trigger the braking function of the electric vehicle, and observe whether the test roller can be braked after braking. If the test roller is braked, it is determined that the braking system of the electric vehicle is qualified; otherwise, if the test roller is not braked, it is determined that the braking system of the electric vehicle is unqualified, so that the braking test method in this application can relatively automatically and quickly determine whether the braking system of the electric vehicle is qualified. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the braking detection mechanism of the present invention;

[0018] Figure 2 Schematic diagram of another perspective of the brake detection mechanism of the present invention;

[0019] Figure 3 Schematic diagram of yet another perspective of the brake detection mechanism of the present invention;

[0020] Figure 4 Cross-sectional view of the slewing support module of the brake detection mechanism of the present invention;

[0021] Figure 5 Partial schematic diagram of the slewing support module of the brake detection mechanism of the present invention.

[0022] Wherein: 1 - frame; 2 - triggering device, 21 - clamping cylinder, 22 - clamping plate; 3 - feedback device, 31 - test roller, 32 - servo motor, 33 - slewing support module, 331 - box body, 332 - fixed sleeve, 333 - rotating sleeve, 334 - return spring, 335 - first connecting plate, 336 - second connecting member, 34 - adjustment module, 341 - slide rail, 342 - slider, 343 - second connecting plate, 344 - bottom plate, 345 - adjustment cylinder, 346 - shock absorber, 347 - first connecting member; 4 - electric vehicle. Specific embodiments

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The description of at least one exemplary embodiment is actually only illustrative and in no way restrictive of the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0025] Unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc., is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be construed as limiting the protection scope of the present invention; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0027] For ease of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above-mentioned", etc. can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientation of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0028] In addition, it should be noted that the use of words such as "first", "second", etc. to limit components is only for the convenience of differentiating the corresponding components. Without otherwise stating, the above words have no special meaning, and thus cannot be construed as limiting the protection scope of the present invention.

[0029] Such as Figures 1-5As shown in the figure, the present application provides a brake detection mechanism for an electric vehicle 4, which is characterized by including a frame 1, a trigger device 2 and a feedback device 3. The frame 1 is used to place the electric vehicle 4. The trigger device 2 is configured on the frame 1, and the trigger device 2 is located at the brake handle of the electric vehicle 4 to push the brake handle of the electric vehicle 4 to act. The feedback device 3 is configured on the frame 1. The feedback device 3 includes a rotatable test roller 31. The test roller 31 is driven by a servo motor 32. The circumferential rolling surface of the test roller 31 contacts the rolling surface of the wheel of the electric vehicle 4, and the movement trajectory of the test roller 31 and the movement trajectory of the wheel of the electric vehicle 4 are formed in the same plane.

[0030] To completely brake the moving wheels of the electric vehicle 4, the brake pads are required to lock the wheels. At this time, an effective braking torque will be generated on the locked wheels. The manufacturer of the electric vehicle 4 needs to ensure that for each electric vehicle 4 on the production line, the actual braking torque value on its wheels is greater than or equal to the effective braking torque value when the braking action is completed. The design principle of the brake detection mechanism of the present application is to replace the effective braking torque with the driving torque of the servo motor 32 and compare the driving torque with the actual braking torque of each electric vehicle 4. Specifically, for the brake detection mechanism of the present application, after placing the electric vehicle 4 on the frame 1, first start the trigger device 2 to brake the electric vehicle 4. After the braking action is completed and the actual braking torque value of the electric vehicle 4 stabilizes, start the servo motor 32 to drive the test roller 31 on the feedback device 3 to rotate. Here, when setting the driving torque of the servo motor 32, it should be ensured that the set driving torque value of the servo motor 32 is the same as the effective braking torque value provided by the manufacturer of the electric vehicle 4. Since the circumferential rolling surface of the test roller 31 contacts the rolling surface of the wheel of the electric vehicle 4, and the movement trajectory of the test roller 31 and the movement trajectory of the wheel of the electric vehicle 4 are formed in the same plane, the driving torque of the servo motor 32 will act on the wheel of the electric vehicle 4 through the test roller 31. The driving torque acting on the wheel of the electric vehicle 4 will counteract the actual braking torque also applied to the wheel. At this time, if the actual braking torque value is greater than or equal to the driving torque value of the servo motor 32, the wheels of the electric vehicle 4 remain in the braked state, the test roller 31 cannot rotate, and the signal of the encoder of the servo motor 32 recognized by the detection system does not change. The detection system will determine that the braking system of the electric vehicle 4 is qualified; if the actual braking torque value is less than the driving torque value of the servo motor 32, the wheels of the electric vehicle 4 will be driven by the test roller 31, and the test roller 31 is also in a rotating state. The detection system recognizes that the signal change of the encoder of the servo motor 32 is normal and regular, and the detection system determines that the braking system of the electric vehicle 4 is unqualified. In summary, the brake detection mechanism of the present application solves the technical problem of time-consuming and laborious caused by the insufficient automation of the brake detection of the electric vehicle 4 in the prior art.

[0031] To achieve the braking action of the electric vehicle 4, the triggering device 2 of the present application includes a clamping cylinder 21 and two clamping plates 22 driven by the clamping cylinder 21. The two clamping plates 22 clamp the handle and the brake handle of the electric vehicle 4. When the two clamping plates 22 move and approach under the drive of the clamping cylinder 21, the brake handle is pushed to achieve the braking action.

[0032] During braking, since the electric vehicle 4 is instantly braked to a stop, a lateral torque will be generated on the test roller 31, which is extremely likely to cause the electric vehicle 4 to deflect. To eliminate the deflection caused by the braking lateral torque, the present application designs a slewing bearing module 33 in the feedback device 3. The slewing bearing module 33 includes a box body 331, a fixed sleeve 332, a rotating sleeve 333, and a return spring 334. The test roller 31 is rotatably disposed in the box body 331. The fixed sleeve 332 is disposed on the frame 1. The rotating sleeve 333 is fixedly connected to the bottom of the box body 331, and the rotating sleeve 333 is rotatably fitted on the fixed sleeve 332. The first end of the return spring 334 is connected to the box body 331, and the second end of the return spring 334 is fixedly arranged relative to the box body 331. In this way, when the braking lateral torque is generated, the test roller 31 can rotate with the assistance of the slewing bearing module 33 to buffer the lateral torque. After buffering, the test roller 31 can be reset under the action of the return spring 334.

[0033] Further, for the convenience of assembly, a first connecting plate 335 is fixed to the bottom of the box body 331, and the rotating sleeve 333 is connected to the bottom of the box body 331 through the first connecting plate 335.

[0034] In a preferred embodiment of the present application, the return spring 334 is horizontally arranged, and the second end of the return spring 334 is connected to the side of the first connecting plate 335. In this way, the acting force direction of the horizontally arranged return spring 334 and the acting force direction of the lateral torque are in the same plane, and the reset effect is better.

[0035] Before the test, there will be left and right offsets in the fixed position of the electric vehicle 4, and the position of the test roller 31 needs to be adjusted. The present application designs an adjustment module 34 in the feedback device 3. The adjustment module 34 includes a slide rail 341, a slider 342, a second connecting plate 343, and an adjustment cylinder 345. The slide rail 341 is fixed on the frame 1, and the extending direction of the slide rail 341 is parallel to the axial direction of the test roller 31. The slider 342 is slidably fitted on the slide rail 341, and the slider 342 is fixed to the second connecting plate 343. The fixed sleeve 332 is fixedly connected to the second connecting plate 343 through a bottom plate 344. The second connecting plate 343 is connected to the first connecting plate 335 through the fixed sleeve 332. The cylinder body of the adjustment cylinder 345 is fixedly connected to the frame 1, and the driving end of the piston rod of the adjustment cylinder 345 is connected to the second connecting plate 343. In this way, the position of the test roller 31 can be adjusted to adapt to the electric vehicle 4.

[0036] In a preferred embodiment of the present application, the adjustment module 34 further includes a shock absorber 346 for buffering the second connecting plate 343 pushed out by the piston rod of the adjusted cylinder 345. The shock absorber 346 is fixed to the frame 1 through a first connecting member 347, and the shock head of the shock absorber 346 faces the second connecting plate 343.

[0037] In a preferred embodiment of the present application, the first end of the return spring 334 is fixedly connected to the second connecting plate 343 through a second connecting member 336.

[0038] The present application also provides a brake test method, including: providing a frame 1 for placing an electric vehicle 4, providing a feedback device 3 disposed on the frame 1. The feedback device 3 includes a rotatable test roller 31 driven by a servo motor 32. The circumferential rolling surface of the test roller 31 is in contact with the rolling surface of the wheel of the electric vehicle 4, and the movement trajectory of the test roller 31 and the movement trajectory of the wheel of the electric vehicle 4 are formed in the same plane. The servo motor 32 outputs a driving torque to drive the test roller 31 to roll, and the driving torque is equal to the effective brake torque value provided by the manufacturer. Providing a trigger device 2 disposed on the frame 1 and located at the brake handle of the electric vehicle 4 to push the brake handle of the electric vehicle 4 to act. After the trigger device 2 triggers the braking action of the electric vehicle 4, observe whether the test roller 31 is braked. If the test roller 31 is braked, it is determined that the brake system of the electric vehicle 4 is qualified.

[0039] For the brake test method provided by the present invention, first place the electric vehicle 4 on the frame 1, start the driving motor 32, and the output torque value of the driving motor 32 is the same as the effective brake torque value provided by the manufacturer. The driving motor 32 drives the test roller 31 to roll. After the test roller 31 rolls, it drives the wheel of the electric vehicle 4 to rotate. After the wheel of the electric vehicle 4 rotates stably, use the trigger device 2 to trigger the braking function of the electric vehicle 4, and observe whether the electric vehicle 4 after braking can brake the test roller 31. If the test roller 31 is braked, it is determined that the brake system of the electric vehicle 4 is qualified. On the contrary, if the test roller 31 is not braked, it is determined that the brake system of the electric vehicle 4 is unqualified, so that the brake test method of the present application can relatively automatically and quickly determine whether the brake system of the electric vehicle 4 is qualified.

[0040] It should be understood that the specific embodiments described above are only used to explain the present invention and are not used to limit the present invention. Obvious changes or variations derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A brake detection mechanism for an electric vehicle (4), characterized in that, Comprising; A frame (1) for placing an electric vehicle (4); A triggering device (2) configured on the frame (1) and located at the brake handle of the electric vehicle (4) to push the brake handle of the electric vehicle (4) to actuate; A feedback device (3) configured on the frame (1), the feedback device (3) includes a rotatable test roller (31) driven by a servo motor (32), the circumferential rolling surface of the test roller (31) contacts the rolling surface of the wheel of the electric vehicle (4), and the movement trajectory of the test roller (31) and the movement trajectory of the wheel of the electric vehicle (4) are formed in the same plane; Wherein, the triggering device (2) includes a clamping cylinder (21) and two clamping plates (22) driven by the clamping cylinder (21), the two clamping plates (22) clamp the handle and the brake handle of the electric vehicle (4), and when the two clamping plates (22) move and approach under the drive of the clamping cylinder (21), the brake handle is pushed to achieve a braking action; Wherein, the feedback device (3) further includes a slewing bearing module (33), and the slewing bearing module (33) includes: A box body (331) in which the test roller (31) is rotatably configured; A fixed sleeve (332) configured on the frame (1); A rotating sleeve (333) fixedly connected to the bottom of the box body (331) and rotatably fitted on the fixed sleeve (332); A return spring (334) with its first end connected to the box body (331) and its second end fixedly arranged relative to the box body (331).

2. The brake detection mechanism according to claim 1, characterized in that, A first connecting plate (335) is fixed to the bottom of the box body (331), and the rotating sleeve (333) is connected to the bottom of the box body (331) through the first connecting plate (335).

3. The brake detection mechanism according to claim 2, wherein, The return spring (334) is horizontally arranged, and the second end of the return spring (334) is connected to the side of the first connecting piece.

4. The brake detection mechanism according to claim 3, characterized in that, It further includes an adjustment module (34), and the adjustment module (34) includes: A slide rail (341) fixed on the frame (1) and the extending direction of the slide rail (341) is parallel to the axial direction of the test roller (31); A slider (342) slidably fitted on the slide rail (341) and the slider (342) is fixed to a second connecting plate (343); A second connecting plate (343), the fixed sleeve (332) is fixedly connected to the second connecting plate (343) through a bottom plate (344), and the second connecting plate (343) is connected to the first connecting plate (335) through the fixed sleeve (332); An adjusting cylinder (345) is provided, the cylinder body of the adjusting cylinder (345) is fixedly connected to the frame (1), and the driving end of the piston rod of the adjusting cylinder (345) is connected to the second connecting plate (343).

5. The brake detection mechanism according to claim 4, wherein, The adjusting module (34) further includes a shock absorber (346) for buffering the second connecting plate (343) pushed out by the piston rod of the adjusting cylinder (345). The shock absorber (346) is fixed to the frame (1) through a first connecting member (347), and the shock head of the shock absorber (346) faces the second connecting plate (343).

6. The brake detection mechanism according to claim 4, characterized in that, The first end of the return spring (334) is fixedly connected to the second connecting plate (343) through a second connecting member (336).

7. A braking test method, characterized in that, Performing detection by using the brake detection mechanism according to any one of claims 1-6, including: Providing a frame (1) for placing an electric vehicle (4); Providing a feedback device (3) configured on the frame (1). The feedback device (3) includes a rotatable test roller (31) driven by a servo motor (32). The circumferential rolling surface of the test roller (31) contacts the rolling surface of the wheel of the electric vehicle (4), and the movement trajectory of the test roller (31) and the movement trajectory of the wheel of the electric vehicle (4) are in the same plane. The servo motor (32) outputs a driving torque to drive the test roller (31) to roll, and the driving torque is equal to the effective brake torque value provided by the manufacturer. Providing a triggering device (2) configured on the frame (1) and located at the brake handle of the electric vehicle (4) to push the brake handle of the electric vehicle (4) to actuate. After the triggering device (2) triggers the braking action of the electric vehicle (4), observe whether the test roller (31) is stopped. If the test roller (31) is stopped, the braking system of the electric vehicle (4) is qualified.

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