Split type automobile brake detection device

Abstract

The utility model discloses a split type automobile brake detection device in the field of motor vehicle detection devices, which is characterized in that a main roller and an auxiliary roller are rotatably arranged on a base, and the shaft ends of the main roller and the auxiliary roller are in transmission connection through a first chain transmission assembly; a driving motor is arranged on the front side of the machine base, the main shaft end of the driving motor is in transmission connection with the shaft end of the main roller through a second chain transmission assembly, the first chain transmission assembly and the second chain transmission assembly are arranged at the two ends of the main roller respectively, and the main roller, the auxiliary roller and the axis of the driving motor are parallel. A bearing support is arranged above the driving motor, the two sides of the bearing support are fixed to the machine base, protection plates are vertically arranged on the two sides of the first chain transmission assembly and the two sides of the second chain transmission assembly respectively, side edge covering parts are arranged above the protection plates, and a middle covering part is arranged above the bearing support. According to the device, the arrangement size in the width direction can be reduced, so that the device can be arranged in a width-limited space, and the device is suitable for detection of large-scale and heavy-load vehicles.

Description

Technical Field

[0001] The utility model relates to a motor vehicle detection device, in particular to a detection device for detecting the braking performance of a vehicle. Background Art

[0002] In the prior art, there is a kind of automobile brake testing bench, which has the publication number: CN209764438U; publication date: 2019-12-10, and the device includes a body and two groups of roller groups symmetrically arranged in the body, and the upper surface of the body is provided with two grooves for placing the two groups of roller groups respectively, and the two groups of roller groups each include a main roller and a secondary roller with axes parallel to each other and a third roller located between the main roller and the secondary roller, the main roller is rotatably connected to the inner wall of the groove through a first rotating shaft, and the secondary roller is rotatably connected to the inner wall of the groove through a second rotating shaft, a first sleeve is sleeved on the circumferential side wall of the second rotating shaft at both ends of the secondary roller, and a cylinder for driving the second rotating shaft to slide along the width direction of the body is fixedly connected to the circumferential side wall of the first sleeve, and a sliding port for slidingly cooperating with the second rotating shaft is provided on the inner wall of the groove, and an adjustment box is provided on the body at both ends of the roller group, and a drive assembly for driving the roller group to rotate is provided in the adjustment box. The drive assembly includes a drive motor located within the adjustment box, a driving gear driven by the drive motor, a first driven gear and a second driven gear respectively meshed with the driving gear at both ends. A first transmission assembly is disposed between the first driven gear and the first rotating shaft, and a second transmission assembly is disposed between the second driven gear and the second rotating shaft. Before performing a brake test, the vehicle is driven onto a vehicle brake test bench, with the left and right front or rear wheels of the vehicle simultaneously resting on the corresponding main rollers and auxiliary rollers on both sides of the vehicle body. The vehicle's brake mechanism (foot brake and hand brake) is released. During the test, the drive motor drives the wheels to rotate. When a certain speed is reached, the foot brake is manually depressed or the hand brake is applied. The magnitude of the vehicle's braking force can be detected by changes in the drive motor load or by detecting the regenerative current generated by the drive motor. The braking performance can be tested by measuring the time it takes to stop the wheels.

[0003] The shortcomings of this method are as follows: First, the two roller groups are symmetrically arranged within the device. Although this allows for testing the braking force of the wheels on both sides, it also results in a relatively large width of the device, making its layout inflexible and inconvenient for testing vehicles with large wheelbase variations. Second, the drive motor is arranged at the end of the main roller shaft, which itself increases the lateral dimensions of the device, making its layout inconvenient, especially in locations where the width is restricted by the dimensions of the building structure. Third, the drive motor of the existing testing device cannot achieve self-locking, so a third roller must be mounted on a lifting device. After the test is completed, the wheel must be lifted by the lifting device before the vehicle can be properly driven out of the testing platform. Otherwise, the main roller and auxiliary roller will rotate, preventing the vehicle from leaving the testing position. Existing automobile brake testing platforms are suitable for testing small vehicles. However, for large vehicles, the drive motor required is larger, resulting in a larger width dimension required to accommodate two sets of main rollers, auxiliary rollers, and the drive motor. Utility Model Content

[0004] The purpose of the utility model is to provide a split automobile brake detection device, which can reduce the layout size in the width direction so that it can be arranged in a space with limited width, making it suitable for the detection of large and heavy-loaded vehicles.

[0005] The purpose of the utility model is achieved as follows: a split automobile brake detection device comprises a machine base, on which a main roller and a secondary roller are rotatably arranged, and one end shaft end of the main roller and the secondary roller are connected via a first chain transmission assembly; a driving motor is provided on the front side of the machine base, and the main shaft end of the driving motor and the other end shaft end of the main roller are connected via a second chain transmission assembly, the first chain transmission assembly and the second chain transmission assembly are respectively arranged at both ends of the main roller, and the axes of the main roller, the secondary roller and the driving motor are arranged parallel to each other; a bearing bracket is provided above the driving motor, and both sides of the bearing bracket are fixed to the machine base, and protective plates are respectively vertically arranged above both sides of the first chain transmission assembly and the second chain transmission assembly, and side covers are provided above the protective plates. The protective plates and the side covers are fixedly arranged relative to the machine base as a whole, and a middle cover is provided above the bearing bracket.

[0006] The present invention adopts a second chain drive assembly to change the position of the drive motor, placing the drive motor in front of the main roller. At the same time, only two sets of main rollers and auxiliary rollers are used, which greatly reduces the width of the entire device. By placing the drive motor in front of the main roller, the size of the drive motor itself can be larger, which can adapt to the detection of large and heavy-loaded vehicles. At the same time, the motor housing and both ends of the main shaft can be supported and reinforced, so that it can bear greater torque. The support bracket is used to protect the motor, the side cover is used to protect the first and second chain drive assemblies, so that they can operate reliably, and the middle cover is used to prevent dust from falling on the moving parts of the drive motor, so that they can operate reliably. Compared with the prior art: the present invention only sets one set of brake detection devices for one wheel on one side, which can detect the braking performance of the single wheel. When it is necessary to detect both wheels at the same time, two sets of devices can be set in parallel, so it is called a split-type automobile brake detection device. Due to its small size in the width direction, it is flexible to arrange and can be easily installed even in places with limited building structure size. This structure makes the power and size of the drive motor almost unlimited, so that the entire device is particularly suitable for testing the braking performance of large and heavy-loaded vehicles.

[0007] Furthermore, a motor locking mechanism is connected to one end of the drive motor housing for locking the main shaft of the drive motor. Since the drive motor is positioned in front of the main roller, there is ample space for the motor locking mechanism, thereby eliminating the third roller in the prior art and resolving the drawback of the prior art where the car must be lifted up by the third roller before it can be driven away. Due to the motor's large size, the torque it can generate is also high. Therefore, even without a motor locking mechanism, the motor's electronic control design alone can ensure that the drive motor generates sufficient braking torque when the car leaves the brake detection device, preventing the drive motor from rotating with the wheels and ensuring that the car can normally leave the detection position.

[0008] Furthermore, a third roller is provided between the main roller and the auxiliary roller. The two axial ends of the third roller are rotatably connected to one end of a crank arm, and the other end of the crank arm is rotatably connected to a crank arm support. The crank arm support is fixed to the machine base, and the crank arms on both sides are connected via a connecting plate. The connecting plate is located on the lower side of the third roller. A spring connecting seat is also provided on one side of the machine base. The spring connecting seat and one end of the crank arm are connected via a tension spring. A limit plate is connected to the crank arm support. The tension spring pulls the crank arm to rotate and rise upward, causing the crank arm to contact the lower side of the limit plate. A speed sensor for measuring the rotation speed of the third roller is provided on the connecting plate. In this solution, when the vehicle is in the detection position, the tension of the tension spring pulls the third roller to contact the wheel, and the third roller rotates with the wheel. The wheel rotation speed can be measured by the speed sensor. Compared with the prior art, although both are provided with a third roller, the third roller of the utility model is a follow-up roller, which does not need to support the entire wheel and body when necessary. Therefore, its lifting and lowering only requires a tension spring with small tension, and its size can be very small. Its function is different from that of the third roller in the prior art.

[0009] A further improvement is that the crank arm support is equipped with a sensing bracket, which is equipped with a proximity switch. When the car wheel is supported on the main roller and the auxiliary roller, the wheel presses down the third roller, causing the crank arm to rotate and triggering the proximity switch. The proximity switch can detect whether the wheel is in place, thus realizing automatic control.

[0010] Furthermore, the main roller and the auxiliary roller, together with the bearing seats at their ends, are mounted on a roller support beam, and a load cell is provided between the roller support beam and the machine base, through which wheel pressure data can be collected.

[0011] Furthermore, motor bearing seats are provided at both ends of the main shaft of the drive motor, and the motor bearing seats are installed on the machine base through the motor mounting beam. A torque connecting frame is fixed on the housing of the drive motor, and a pressure rod is connected to the torque connecting frame. A brake sensor is provided on the machine base corresponding to the position of the pressure rod. The torque generated when the car brakes triggers the brake sensor to operate through the torque connecting frame and the pressure rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model.

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of the utility model after the side covers and the middle cover are removed.

[0014] Figure 3 A three-dimensional diagram of the internal structure of the utility model Figure 1 .

[0015] Figure 4 For Figure 3Corresponding plan view of the internal structure of the present invention.

[0016] Figure 5 A three-dimensional diagram of the internal structure of the utility model Figure 2 , which is in Figure 3 Some parts were further removed from the foundation.

[0017] Figure 6 A three-dimensional diagram of the partial structure of the third roller and its connecting parts Figure 1 .

[0018] Figure 7 A three-dimensional diagram of the partial structure of the third roller and its connecting parts Figure 2 .

[0019] In the figure, 1 is a secondary roller, 2 is a third roller, 3 is a main roller, 4 is a middle cover, 5 is a machine base, 6 is a side cover, 7 is a second chain transmission assembly, 8 is a driving motor, 8a is a motor locking mechanism, 9 is a load-bearing bracket, 10 is a protective plate, 11 is a first chain transmission assembly, 12 is a crank arm, 13 is a crank arm support, 14 is a spring connecting seat, 15 is a limit plate, 16 is a speed sensor, 17 is a proximity switch, 18 is a connecting plate, 19 is a tension spring, 20 is an induction bracket, 21 is a weighing sensor, 22 is a roller support beam, 23 is a pressure rod, 24 is a brake sensor, 25 is a torque connecting frame, and 26 is a motor mounting beam. DETAILED DESCRIPTION

[0020] like Figure 1-7 As shown, a split-type automobile brake detection device includes a base 5, on which a main drum 3 and an auxiliary drum 1 are rotatably provided. One end of the shaft of the main drum 3 and the auxiliary drum 1 are connected to each other via a first chain transmission assembly 11; a drive motor 8 is provided on the front side of the base 5, and the main shaft end of the drive motor 8 is connected to the other end of the shaft of the main drum 3 via a second chain transmission assembly 7. The first chain transmission assembly 11 and the second chain transmission assembly 7 are respectively arranged at both ends of the main drum 3, and the axes of the main drum 3, the auxiliary drum 1 and the drive motor 8 are arranged parallel to each other; a supporting bracket 9 is provided above the drive motor 8, and both sides of the supporting bracket 9 are fixed to the base 5, and protective plates 10 are respectively vertically provided above both sides of the first chain transmission assembly 11 and the second chain transmission assembly 7. A side cover 6 is provided above the protective plate 10. The protective plate 10 and the side cover 6 are fixed relative to the base 5 as a whole, and can be directly fixed to the base 5 or fixed to other fixing members extending from the base 5. A middle cover 4 is provided above the supporting bracket 9.

[0021] The present invention utilizes a second chain drive assembly 7 to reposition the drive motor 8, placing it in front of the main roller 3. Simultaneously, by utilizing only two sets of main rollers 3 and auxiliary rollers 1, the entire device is significantly reduced in width. Placing the drive motor 8 in front of the main roller 3 allows the motor 8 to be larger, making it suitable for testing large, heavy-loaded vehicles. Furthermore, the motor housing and both ends of the main shaft are supported and reinforced, allowing it to carry greater torque. A support bracket 9 protects the motor, while a side cover 6 protects the first and second chain drive assemblies 11 and 7, ensuring reliable operation. A center cover 4 prevents dust from settling on the moving parts of the drive motor 8, ensuring reliable operation. The device only provides one set of brake detection devices for a single wheel, enabling testing of the braking performance of that wheel. When testing both wheels simultaneously is required, two sets of devices can be arranged in parallel. Due to its small width, it offers flexible deployment and can be easily installed even in locations restricted by building dimensions. This structure makes the power and size of the drive motor 8 almost unlimited, so that the entire device is particularly suitable for testing the braking performance of large and heavy-loaded vehicles.

[0022] Furthermore, one end of the housing of the drive motor 8 is connected to a motor locking mechanism 8a for locking the main shaft of the drive motor 8. The motor locking mechanism 8a can be a brake clutch or a motor shaft brake device. Since the drive motor 8 is arranged in front of the main drum 3, there is sufficient space to set the motor locking mechanism 8a. Since the motor size can be larger, the torque generated by the motor is also larger. Therefore, even if the motor locking mechanism 8a is not adopted, only through the electronic control design of the motor, when the car leaves the brake detection device, the drive motor 8 can generate sufficient braking torque to prevent the drive motor 8 from rotating with the wheel, thereby ensuring that the car normally leaves the detection position.

[0023] Furthermore, a third roller 2 is provided between the main roller 3 and the auxiliary roller 1. The two axial ends of the third roller 2 are rotatably connected to one end of a crank arm 12, and the other end of the crank arm 12 is rotatably connected to a crank arm support 13. The crank arm support 13 is fixed to the base 5. The crank arms 12 on both sides are connected by a connecting plate 18, which is located on the lower side of the third roller 2. A spring connecting seat 14 is also provided on one side of the base 5. The spring connecting seat 14 is connected to one end of the crank arm 12 by a tension spring 19. A limit plate 15 is connected to the crank arm support 13. The tension spring 19 pulls the crank arm 12 to rotate and rise upward, causing the crank arm 12 to contact the lower side of the limit plate 15. A speed sensor 16 for measuring the rotation speed of the third roller 2 is provided on the connecting plate 18. In this solution, when the vehicle is in the detection position, the tension of the tension spring 19 pulls the third roller 2 to contact the wheel, and the third roller 2 rotates with the rotation of the wheel. The speed sensor 16 can measure the rotation speed of the wheel. Compared with the prior art, although the third roller 2 is provided, the third roller 2 of the present device is a follow-up roller and does not need to support the entire wheel and body when necessary. Therefore, its lifting and lowering only requires a small tension spring 19, and its size can be very small. Its function is different from that of the third roller 2 in the prior art.

[0024] A further improvement is that a sensing bracket 20 is mounted on the crank arm support 13, and a proximity switch 17 is mounted on the sensing bracket 20. When the vehicle wheel is supported on the main roller 3 and the auxiliary roller 1, the wheel presses down the third roller 2, causing the crank arm 12 to rotate and trigger the proximity switch 17. The proximity switch 17 can detect whether the wheel is in place, thereby realizing automatic control.

[0025] Furthermore, the main roller 1 and the auxiliary roller 3 together with the bearing seats at their ends are mounted on the roller support beam 22, and a weighing sensor 21 is provided between the roller support beam 22 and the machine base. The wheel pressure data can be collected by the weighing sensor 21.

[0026] Furthermore, motor bearing seats are provided at both ends of the main shaft of the drive motor 8, and the motor bearing seats are installed on the machine base 5 through the motor mounting beam 26. A torque connecting frame 25 is fixed on the housing of the drive motor 8, and a pressure rod is connected to the torque connecting frame 25. A brake sensor 24 is provided on the machine base 5 corresponding to the position of the pressure rod 23. The torque generated when the car brakes triggers the brake sensor 24 to operate through the torque connecting frame 25 and the pressure rod 23.

[0027] The present invention is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the present invention, technicians in this field can make some substitutions and deformations of some technical features therein according to the disclosed technical content without creative labor, and these substitutions and deformations are all within the protection scope of the present invention.

Claims

1. A split-type automobile brake detection device, comprising a base, on which a main roller and a secondary roller are rotatably mounted, wherein one end of the main roller and the secondary roller are connected to each other by a first chain transmission assembly; characterized in that: A driving motor is provided on the front side of the machine base, and the main shaft end of the driving motor is connected to the other shaft end of the main roller via a second chain transmission assembly. The first chain transmission assembly and the second chain transmission assembly are respectively arranged at both ends of the main roller, and the axes of the main roller, auxiliary roller and driving motor are arranged parallel to each other; a bearing bracket is provided above the driving motor, and both sides of the bearing bracket are fixed to the machine base, and protective plates are respectively vertically provided above both sides of the first chain transmission assembly and the second chain transmission assembly, and side covers are provided above the protective plates. The protective plates and the side covers are fixed relative to the machine base as a whole, and a middle cover is provided above the bearing bracket.

2. A split-type automobile brake detection device according to claim 1, characterized in that: One end of the housing of the drive motor is connected to a motor locking mechanism for locking the main shaft of the drive motor.

3. The split-type automobile brake detection device according to claim 1, characterized in that: A third roller is arranged between the main roller and the auxiliary roller, and the two axial ends of the third roller are rotatably connected to one end of the crank arm, and the other end of the crank arm is rotatably connected to the crank arm support. The crank arm support is fixed on the machine base, and the crank arms on both sides are connected via a connecting plate, and the connecting plate is located at the lower side of the third roller; a spring connecting seat is also provided on one side of the machine base, and the spring connecting seat and the crank arm at one end are connected via a tension spring, and a limiting plate is connected to the crank arm support, and the tension spring pulls the crank arm to rotate and rise upward, and makes the crank arm contact the lower side of the limit plate, and a speed sensor for measuring the rotational speed of the third roller is provided on the connecting plate.

4. A split-type automobile brake detection device according to claim 3, characterized in that: An induction bracket is installed on the crank arm support, and a proximity switch is installed on the induction bracket. When the car wheel is supported on the main roller and the auxiliary roller, the wheel presses down the third roller, causing the crank arm to rotate and just trigger the proximity switch.

5. A split-type automobile brake detection device according to any one of claims 1 to 4, characterized in that: The main roller and the auxiliary roller together with the bearing seats at their ends are installed on the roller support beam, and a weighing sensor is provided between the roller support beam and the machine base.

6. A split-type automobile brake detection device according to any one of claims 1 to 4, characterized in that: Motor bearing seats are provided at both ends of the main shaft of the drive motor, and the motor bearing seats are installed on the machine base through the motor mounting beam. A torque connecting frame is fixed on the housing of the drive motor, and a pressure rod is connected to the torque connecting frame. A brake sensor is provided on the machine base corresponding to the position of the pressure rod. The torque generated when the car brakes triggers the brake sensor to operate through the torque connecting frame and the pressure rod.

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