Brake return function detection device

Abstract

The utility model discloses a brake return function detection device. The brake return function detection device comprises a detection device, a cylinder, a transmission device and a cross beam, the transmission device is movably installed at the front end of the air cylinder, the cross beam is installed between the transmission device and the air cylinder, the detection device comprises a movable end and a fixed end, the fixed end is fixedly installed at a fixed position under a vehicle, the movable end is detachably installed at any position on the transmission device, and the cross beam is installed on the movable end. The brake return function is detected by detecting the relative position of the movable end and the fixed end; during detection, detection can be carried out through the mutual relation between the displacement sensor and the positioning block, slight deviation of the brake return function can be known, compared with a traditional detection mode, direct detection can be carried out, feedback after temperature rises does not need to be waited, and compared with a traditional device, the device is quicker and more convenient to use. In addition, a driver can be reminded when friction is about to occur, and rapidness and safety are achieved.

Description

Technical Field

[0001] This utility model belongs to the field of brake testing technology, specifically relating to a brake return function testing device. Background Technology

[0002] Car braking, also known as braking, refers to the process of slowing down or stopping a moving vehicle, primarily relying on braking to stop. The brake return function refers to the ability of the braking system's components to automatically return to their initial state after braking. Brake return is a function based on the action of braking and is equally important to the braking system.

[0003] However, under various conditions, existing braking systems often experience insufficient air or hydraulic pressure in the hydraulic or air pumps, or the presence of moisture or oil contaminants in the air circuit can cause abnormal brake return function. Abnormal return function may cause the brake pads to continuously rub and generate high temperatures, which can lead to fire, causing serious economic losses or even life-threatening situations for the driver. Therefore, it is essential to test the brake return function.

[0004] Currently, the brake return function is generally detected by a temperature sensor to detect the temperature at the corresponding position and then feed the temperature back to the driver to reflect the brake status. However, this method is often based on the condition that the temperature rises, meaning that it can only be detected when the temperature rises to a certain value. By the time the reaction is made, the brake pads have often been rubbing for a certain period of time, which still poses a certain danger.

[0005] Therefore, a brake return function detection device is needed to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, on the one hand, this utility model designs a brake return function detection device, including: a detection device, a cylinder, a transmission device, and a crossbeam; the transmission device is movably mounted at the front end of the cylinder, the crossbeam is installed between the transmission device and the cylinder, the detection device includes a movable end and a fixed end, the fixed end is fixedly installed at a fixed position under the vehicle, and the movable end is detachably installed at any position on the transmission device, and the brake return function is detected by detecting the relative position of the movable end and the fixed end.

[0007] Furthermore, the mobile end includes an inclined plate, a vertical plate, and a displacement sensor; the vertical plate has an L-shaped structure, the lower end of the vertical plate is fixedly connected to the inclined plate, and the upper end of the vertical plate is fixedly mounted on one side biased towards the cylinder output shaft, with the transmission line on the displacement sensor passing through the other side of the vertical plate; the brake return status is detected by detecting the relative position of the positioning block mounted on the fixed end through the sensor on the mobile end.

[0008] Furthermore, the fixed end includes a clamping cylinder and an arc-shaped slider; the clamping cylinder has a semi-annular structure, and an arc-shaped groove is provided in the middle of the clamping cylinder. The arc-shaped slider is movably mounted on the arc-shaped groove, and a fixing block is fixedly mounted in the middle of the arc-shaped slider. A small cam is rotatably mounted on the fixing block, and a pull rod is fixedly mounted on the small cam; the rotation of the pull rod is controlled in a forward or reverse direction to fix or release the cylinder output shaft.

[0009] Furthermore, a support plate is fixedly installed at the front end of the cylinder. The support plate has a U-shaped structure. A power supply and a control unit are fixedly installed on the left and right outer sides of the support plate, respectively. The control unit and the sensor are electrically connected. Hanging holes are opened on one side of the upper end of the two side walls of the support plate.

[0010] Furthermore, the transmission device includes a spring, a U-shaped block, a large cam, a U-shaped plate, and an output shaft; the U-shaped block is fixedly installed at the end of the output shaft, the large cam is movably installed on the U-shaped block, a limit hole is opened at the upper end of the large cam, the spring is hung on the limit hole, and the other end of the spring is hung on the hanging hole; the end of the large cam is rotatably connected to the U-shaped plate, and a transmission shaft is fixedly connected to the position where the large cam rotates, and the transmission shaft is connected to the brake of the car.

[0011] Furthermore, the movable end can be installed on the cam, drive shaft, or cylinder output shaft, and the fixed end can be installed on the crossbeam or load-bearing plate. The installation method can be welding, bolting, or bonding.

[0012] The beneficial effects of this utility model are:

[0013] This utility model designs a brake return function detection device, including: a detection device, a cylinder, a transmission device, and a crossbeam; the transmission device is movably mounted at the front end of the cylinder, and the crossbeam is installed between the transmission device and the cylinder; the detection device includes a movable end and a fixed end, the fixed end is fixedly installed at a fixed position under the vehicle, and the movable end is detachably installed at any position on the transmission device; the brake return function is detected by detecting the relative position of the movable end and the fixed end; during detection, the relationship between the displacement sensor and the positioning block can be used for detection, which can detect even a slight deviation in the brake return function. Compared with traditional detection methods, it can detect directly without waiting for feedback after the temperature rises, making it faster than traditional devices, and can remind the driver when friction is about to occur, making it quicker and safer;

[0014] Furthermore, the fixed end can be clamped and released to adjust the position of the positioning block on it. The fixed end can be used to calibrate the sensor's working position, resulting in more accurate detection. This is especially useful when the output shaft itself has a problem but there is no brake pad friction; the fixed end allows for quick calibration, making it convenient and practical. Additionally, the movable end can be installed at any position on the transmission device to test the brake's return function. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0016] Figure 1 This is a schematic diagram of the overall structure of a brake return function detection device;

[0017] Figure 2 This is a side view of a brake return function detection device;

[0018] Figure 3 This is a top view of a brake return function detection device;

[0019] Figure 4 This is a schematic diagram of the overall structure of a brake return function detection device from another perspective.

[0020] Figure 5 This is a schematic diagram of the overall structure of the fixed end of a brake return function detection device.

[0021] The attached diagram lists the components represented by each number as follows:

[0022] 1-Drive shaft, 2-Large cam, 21-Round hole, 22-U-shaped plate, 3-Cylinder, 31-Bearing plate, 311-Limiting hole, 312-Through groove, 313-Hanging hole, 314-Spring, 315-Fixing nut, 32-Output shaft, 33-U-shaped block, 4-Support device, 41-Control unit, 42-Power supply, 43-Moving end, 431-Inclined plate, 432-Vertical plate, 433-Transmission line, 434-Displacement sensor, 44-Fixed end, 441-Positioning block, 442-Clamping cylinder, 443-Arc-shaped slide groove, 444-Arc-shaped slider, 445-Fixed block, 446-Small cam, 447-Pull rod, 5-Crossbeam. Detailed Implementation Example 1

[0023] This utility model discloses a brake return function detection device, comprising: a detection device, a cylinder 3, a transmission device, and a crossbeam 5; the transmission device is movably mounted at the front end of the cylinder 3, and the crossbeam 5 is installed between the transmission device and the cylinder 3; the detection device includes a movable end and a fixed end, the fixed end is fixedly installed at a fixed position under the vehicle, and the movable end is detachably installed at any position on the transmission device; the brake return function is detected by detecting the relative position of the movable end and the fixed end.

[0024] The mobile end includes an inclined plate 431, a vertical plate 432, and a displacement sensor 434. The vertical plate 432 has an L-shaped structure, with the lower end of the vertical plate 432 fixedly connected to the inclined plate 431. The upper end of the vertical plate 432 is biased towards the output shaft 32 of the cylinder 3, and the displacement sensor 434 is fixedly installed on one side. The transmission line 433 on the displacement sensor 434 passes through the other side of the vertical plate 432. The relative position of the positioning block 441 on the fixed end 44 is detected by the sensor on the mobile end 43 to detect the brake return function. The mobile end 43 can detect the brake return function, and the detection can be performed using the relationship between the displacement sensor 434 and the positioning block 441. This allows for detection even when there is a slight deviation in the brake return function. Traditionally, feedback is provided through temperature detection, which requires the temperature line to rise to a specified temperature. For example, at 60 degrees Celsius, the temperature sensor detects this and issues a warning signal to remind the driver, which to some extent achieves the effect of detecting the brake return function. However, as is well known, braking decelerates through friction. When the driver uses the brakes continuously, the temperature will still rise, but this does not necessarily indicate a malfunction in the brake return function. Although a warning signal is received, it may be due to the high temperature of the brake itself. Therefore, the traditional method has significant drawbacks. In this embodiment, the relationship between the displacement sensor 434 and the positioning block 441 is used to detect the brake return function. By directly acting on the cylinder 3 (or air pump) in the brake assist system, a warning can be issued directly when there is a problem with the return of the cylinder 3 (air pump). The warning is issued in the first state when the return function occurs, which can minimize the probability of danger.

[0025] In this embodiment, to ensure the normal control and use of the displacement sensor 434, the support plate 31 is made into a U-shaped structure. A power supply 42 and a control unit 41 are fixedly installed on the left and right outer sides of the support plate 31, respectively. The control unit 41 is electrically connected to the sensor. Hanging holes 313 are provided on one side of the upper end of each side wall of the support plate 31. The power supply 42 supplies power to the entire device. The control unit 41 controls the operation of the sensor and receives the sensor's analog signals, which are then converted and transmitted as electrical signals to the driver in the cab for display. The control unit 41 can be controlled by a microcontroller. The power supply 42 can be externally connected or powered by the vehicle's power supply 42 (however, a converter is needed to convert it to a form usable by the microcontroller; this method is achievable with existing technology and will not be discussed further here). Example 2

[0026] In this embodiment, the working position of the sensor is calibrated through the fixed end 44, making the detection more accurate. This is especially useful when the output shaft 32 itself has a problem but there is no brake pad friction; the fixed end 44 allows for quick calibration. Specifically, the fixed end 44 includes a clamping cylinder 442 and an arc-shaped slider 444. The clamping cylinder 442 has a semi-annular structure, with an arc-shaped groove 443 in its center. The arc-shaped slider 444 is movably mounted on the arc-shaped groove 443. A fixing block 445 is fixedly mounted in the center of the arc-shaped slider 444. A small cam 446 is rotatably mounted on the fixing block 445, and a... Pull rod 447; the rotation of pull rod 447 controls the small cam 446 to fix or loosen the output shaft 32 of cylinder 3 by forward or reverse control of pull rod 447; in use, when the position needs to be adjusted, pull rod 447 is pulled counterclockwise, which drives the small cam 446 to rotate counterclockwise, so that the clamping effect of small cam 446 on output shaft 32 disappears, and the fixed end 44 can be moved at this time. When clamping is needed, rotate pull rod 447 clockwise, and small cam 446 can fix it again; in addition, when disassembly and replacement are required, after releasing the handle, the arc-shaped slider 444 can be slid to one side to remove the clamping cylinder 442 of the semi-cylindrical ring. Example 3

[0027] In this embodiment, the transmission device includes a spring 314, a U-shaped block 33, a large cam 2, a U-shaped plate 22, and an output shaft 32. The U-shaped block 33 is fixedly installed at the end of the output shaft 32, and the large cam 2 is movably installed on the U-shaped block 33. The output shaft 32 of the cylinder 3 (or air pump) drives the large cam 2 to rotate in the forward or reverse direction. A limit hole 311 is opened at the upper end of the large cam 2, and the spring 314 is hung on the limit hole 311. The other end of the spring 314 is hung on the hanging hole 313. The end of the large cam 2 is rotatably connected to the U-shaped plate 22, and the position of the large cam 2 is fixedly connected to the transmission shaft 1. The transmission shaft 1 is connected to the brake of the car. The rotation of the large cam 2 will drive the rotation of the transmission shaft 1, which in turn drives the brake to work. The spring 314 can strengthen the return of the brake, so that the rotated cam will reset. By cooperating with the return function detection device to detect the return function and issue a warning, it can effectively remind the driver of the brake return status and effectively reduce the situation of brake pads overheating due to lack of return, which may lead to fire.

[0028] In this embodiment, based on the moving end and fixed end described in Embodiment 1, the moving end can be installed on the large cam 2, the drive shaft 1, and the cylinder output shaft 21, and the fixed end can be installed on the crossbeam 5 or the bearing plate 31. The installation method can be welding, bolting, or bonding.

[0029] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific implementation methods described.

Claims

1. A brake return function detection device, characterized in that, include: The device comprises a detection device, a cylinder, a transmission device, and a crossbeam. The transmission device is movably mounted at the front end of the cylinder, and the crossbeam is installed between the transmission device and the cylinder. The detection device includes a movable end and a fixed end. The fixed end is fixedly installed at a fixed position under the vehicle, and the movable end is detachably installed at any position on the transmission device. The brake return function is detected by detecting the relative position of the movable end and the fixed end.

2. The brake return function detection device according to claim 1, characterized in that, The mobile end includes an inclined plate, a vertical plate, and a displacement sensor; the vertical plate has an L-shaped structure, with the lower end of the vertical plate fixedly connected to the inclined plate, and the upper end of the vertical plate fixedly mounted on one side biased towards the cylinder output shaft, with the transmission line on the displacement sensor passing through the other side of the vertical plate; the brake's return status is detected by the sensor on the mobile end detecting the relative position of the positioning block mounted on the fixed end.

3. The brake return function detection device according to claim 1, characterized in that, The fixed end includes a clamping cylinder and an arc-shaped slider; the clamping cylinder has a semi-circular structure, and an arc-shaped groove is opened in the middle of the clamping cylinder. The arc-shaped slider is movably installed on the arc-shaped groove. A fixing block is fixedly installed in the middle of the arc-shaped slider. A small cam is rotatably installed on the fixing block. A pull rod is fixedly installed on the small cam. By controlling the rotation of the pull rod in the forward or reverse direction, the small cam is controlled to fix or release the cylinder output shaft.

4. The brake return function detection device according to claim 1, characterized in that, A support plate is fixedly installed at the front end of the cylinder. The support plate has a U-shaped structure. A power supply and a control unit are fixedly installed on the left and right outer sides of the support plate, respectively. The control unit and the sensor are electrically connected. Hanging holes are opened on one side of the upper end of the two side walls of the support plate.

5. The brake return function detection device according to claim 4, characterized in that, The transmission device includes a spring, a U-shaped block, a large cam, a U-shaped plate, and an output shaft. The U-shaped block is fixedly installed at the end of the output shaft, and the large cam is movably installed on the U-shaped block. A limit hole is opened at the upper end of the large cam, and the spring is hung on the limit hole. The other end of the spring is hung on the hanging hole. The end of the large cam is rotatably connected to the U-shaped plate, and a transmission shaft is fixedly connected to the position where the large cam rotates. The transmission shaft is connected to the brake of the car.

6. The brake return function detection device according to claim 1, characterized in that, The movable end can be installed on the cam, drive shaft, or cylinder output shaft, and the fixed end can be installed on the crossbeam or load-bearing plate. The installation methods include welding, bolting, and bonding.

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