Automobile loading lifting brake test bench

Abstract

The utility model discloses a kind of automobile loading lifting brake test benches in the motor vehicle detection technical field, including machine base, brake platform and loading lifting device, the loading lifting device is arranged in machine base, for lifting brake platform, the brake platform includes the drive motor being arranged in machine base, chain transmission assembly, main cylinder and auxiliary cylinder, the drive motor is located in main cylinder and auxiliary cylinder directly below, the shaft end of main cylinder and auxiliary cylinder is drivenly connected with drive motor output shaft through chain transmission assembly transmission.The utility model is in the height integrated design of vertical direction, so that equipment is more suitable for narrow workshop or underground detection station and other space limited places.

Description

Technical Field

[0001] This utility model relates to the field of motor vehicle testing technology, and in particular to a vehicle loading, lifting, and braking test bench. Background Technology

[0002] A split-type vehicle brake testing device is disclosed in the prior art (Publication No.: CN223259265U, Application Date: 2024-12-02). It includes a base, on which a main roller and an auxiliary roller are rotatably mounted. The shaft ends of the main roller and auxiliary roller are connected via a first chain drive assembly. A drive motor is located on the front side of the base, and the main shaft end of the drive motor is connected to the shaft end of the main roller via a second chain drive assembly. The first and second chain drive assemblies are located at opposite ends of the main roller, and the axes of the main roller, auxiliary roller, and drive motor are parallel to each other. A support bracket is located above the drive motor, with both sides of the support bracket fixed to the base. Protective plates are vertically mounted on both sides of the first and second chain drive assemblies, with side covers above the protective plates and a central cover above the support bracket. This device can reduce the width dimension of the arrangement, allowing for placement in space with limited width, making it suitable for testing large, heavy-duty vehicles. Its shortcomings are: the drive motor is located on the front side of the main drum and the auxiliary drum, which reduces the width dimension but increases the layout requirements in the length direction. The distributed layout increases the size of the equipment base and is difficult to adapt to narrow workshops or underground testing stations; the dual-chain drive system is complex and can easily lead to deviations in the speed of the main / auxiliary drum, affecting the accuracy of braking torque measurement. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides an automotive loading, lifting, and braking test bench with a highly integrated design in the vertical direction, making the equipment more suitable for space-constrained locations such as narrow workshops or underground testing stations.

[0004] The purpose of this utility model is achieved as follows: A vehicle loading, lifting, and braking test bench includes a base, a braking platform, and a loading and lifting device. The loading and lifting device is installed inside the base and is used to lift the braking platform. The braking platform includes a drive motor, a chain drive assembly, a main roller, and an auxiliary roller installed inside the base. The drive motor is located directly below the main roller and the auxiliary roller. The shaft ends of the main roller and the auxiliary roller are connected to the output shaft of the drive motor via the chain drive assembly.

[0005] In use, when a vehicle enters, its wheels are placed on the main and auxiliary rollers. During the no-load testing phase, the drive motor rotates the roller assembly via a chain drive component to simulate driving. The vehicle brakes during this time, and the system records the no-load braking force data. Subsequently, the loading and lifting device is activated, lifting the brake platform upwards to apply a vertical load to the wheels, simulating a vehicle under load. The drive motor then runs again to test the load braking force, ultimately outputting braking performance parameters under both no-load and load conditions simultaneously. Compared to existing technologies, the advantages of this invention are: placing the drive motor directly below the main and auxiliary rollers achieves high vertical integration, avoiding the additional lateral space required for the side-mounted drive motor layout in existing technologies, thus significantly reducing the overall footprint of the equipment, making it suitable for locations with limited building structures; and using a single chain drive component to synchronously drive the main and auxiliary rollers greatly reduces the number of parts and improves transmission synchronization and anti-interference capabilities.

[0006] As a further improvement of this utility model, the chain drive assembly includes a roller chain, a first sprocket, a second sprocket, a third sprocket, and a fourth sprocket. The roller chain sequentially meshes with the lower meshing tooth surface of the first sprocket, the upper meshing tooth surface of the second sprocket, the lower meshing tooth surface of the third sprocket, and the upper meshing tooth surface of the fourth sprocket to form a closed drive chain. The first sprocket is coaxially and fixedly connected to the output shaft of the drive motor. The second sprocket is coaxially and fixedly connected to the shaft end of the main roller. The third sprocket is rotatably mounted on a fixed base. The fourth sprocket is coaxially and fixedly connected to the shaft end of the auxiliary roller.

[0007] As a further improvement of this utility model, the brake platform also includes a sloping platform, the sloping platform having windows corresponding to the main roller and the auxiliary roller, an adjusting screw being provided on the upper side of the fixed seat, the adjusting screw being threadedly connected to the fixed sleeve, the fixed sleeve being provided on the lower side of the sloping platform, the main roller being located at the high slope of the sloping platform, and the auxiliary roller being located at the low slope of the sloping platform.

[0008] As a further improvement of this utility model, the loading and lifting device includes four hydraulic cylinders arranged in a rectangular shape. The piston rod ends of the four hydraulic cylinders are fixedly connected to the frame. The housing of the drive motor is fixed on the frame. The two shaft ends of the main roller and the auxiliary roller are rotatably mounted on the frame through bearing seats.

[0009] As a further improvement of this utility model, the frame includes two symmetrically distributed main frames. The output shaft of the drive motor is rotatably mounted on either main frame via a bearing seat. The drive motor housing is connected to either main frame as a whole via a connecting frame. Two symmetrically distributed crossbeams are provided between the two main frames. Support columns for abutting against the base are provided on the lower side of the crossbeams. Several connecting plates for fixed connection with the sloping platform are provided on the upper side of the crossbeams.

[0010] As a further improvement of this utility model, the base includes a base and a housing surrounding the base. The cylinder bodies of the four hydraulic cylinders are all fixed on the base. The lower side of the housing extends horizontally inward to form a bottom plate. The upper side of the bottom plate is fixedly connected to the lower side of the base. The upper side of the housing extends horizontally outward to form a top plate. Support feet are provided on the lower sides of the four corners of the top plate. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0012] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Figure 2 This is a three-dimensional structural diagram of the braking platform in this utility model.

[0014] Figure 3 This is a front view of the loading and lifting device in this utility model.

[0015] Figure 4 This is a side view of the loading and lifting device in this utility model.

[0016] The components include: 1. Base, 101. Base, 102. Housing, 103. Support feet, 2. Loading and lifting device, 201. Hydraulic cylinder, 202. Frame, 202a. Main frame, 202b. Connecting frame, 202c. Crossbeam, 202d. Support column, 202e. Connecting plate, 3. Braking platform, 301. Sloping platform, 301a. Window, 302. Drive motor, 303. Chain drive assembly, 303a. Roller chain, 303b. First sprocket, 303c. Second sprocket, 303d. Third sprocket, 303e. Fourth sprocket, 304. Main roller, 305. Auxiliary roller, 306. Fixed seat, 307. Adjusting screw, 308. Fixed sleeve. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1-2The vehicle loading and lifting braking test bench shown includes a base 1, a braking platform 3, and a loading and lifting device 2. The loading and lifting device 2 is installed inside the base 1 and is used to lift the braking platform 3. The braking platform 3 includes a sloping platform 301, a drive motor 302, a chain drive assembly 303, a main roller 304, and an auxiliary roller 305. The sloping platform 301 has windows 301a corresponding to the main roller 304 and the auxiliary roller 305. The drive motor 302, the chain drive assembly 303, the main roller 304, and the auxiliary roller 305 are all installed inside the base 1. The drive motor 302 is located directly below the main roller 304 and the auxiliary roller 305. The shaft ends of the main roller 304 and the auxiliary roller 305 are connected to the output shaft of the drive motor 302 via the chain drive assembly 303.

[0019] The chain drive assembly 303 includes a roller chain 303a, a first sprocket 303b, a second sprocket 303c, a third sprocket 303d, and a fourth sprocket 303e. The roller chain 303a sequentially meshes with the lower meshing tooth surface of the first sprocket 303b, the upper meshing tooth surface of the second sprocket 303c, the lower meshing tooth surface of the third sprocket 303d, and the upper meshing tooth surface of the fourth sprocket 303e to form a closed drive chain. The central shaft of the first sprocket 303b is coaxial with the output shaft of the drive motor 302. The second sprocket 303c is coaxially keyed to the shaft end of the main roller 304, the third sprocket 303d is rotatably mounted on the fixed base 306 via a rotating shaft, and the fourth sprocket 303e is coaxially keyed to the shaft end of the auxiliary roller 305. The sprockets are arranged in an alternating meshing manner, which makes the transmission system fold in the vertical plane, reducing the horizontal space occupied, and compactly integrating the chain drive assembly 303 inside the base 1 to adapt to the limited space of the test bench.

[0020] An adjusting screw 307 is provided on the upper side of the fixed seat 306. The adjusting screw 307 is threadedly connected to the fixed sleeve 308. The fixed sleeve 308 is located on the lower side of the sloped platform 301. The main roller 304 is located at the high point of the sloped platform 301, and the auxiliary roller 305 is located at the low point of the sloped platform 301. By tilting the platform, the slope scenario of the actual road is simulated, which makes up for the deficiency that the horizontal platform cannot simulate the slope. The test results are closer to the real vehicle use scenario, and the reference value is significantly improved. The threaded connection design between the adjusting screw 307 and the fixed sleeve 308 allows the chain to be tensioned by adjusting the position of the third sprocket 303d, which solves the problem of chain loosening after long-term use and reduces the difficulty of maintenance.

[0021] like Figure 3 and 4As shown, the loading and lifting device 2 includes four rectangularly distributed hydraulic cylinders 201. The piston rod ends of the four hydraulic cylinders 201 are fixedly connected to the frame 202 through joints. The housing of the drive motor 302 is fixed on the frame 202. The two shaft ends of the main roller 304 and the auxiliary roller 305 are rotatably mounted on the frame 202 through bearing seats. The four rectangularly distributed cylinders form a planar statically determinate support system. During lifting, the weight of the brake platform 3 and the simulated load during testing are evenly transmitted to the four cylinders through the frame 202, ensuring that the brake platform 3 always maintains vertical lifting and lowering, providing a stable reference platform for braking force testing.

[0022] Specifically, the frame 202 includes two symmetrically distributed main frames 202a. The output shaft of the drive motor 302 is rotatably mounted on either main frame 202a via a bearing seat. The housing of the drive motor 302 is connected to either main frame 202a as a whole via a connecting frame 202b. Two symmetrically distributed crossbeams 202c are provided between the two main frames 202a. A support column 202d is provided on the lower side of the crossbeams 202c to abut against the base 1 when the hydraulic cylinder retracts. Four connecting plates 202e are provided on the upper side of the crossbeams 202c to be fixedly connected to the sloping platform 301.

[0023] The base 1 includes a base 101 and a housing 102 surrounding the base 101. The housing 102 constrains the base 101 on all four sides, which can counteract the torsional moment generated by the off-center load of the frame 202 during lifting and prevent the base 101 from twisting and deforming. The cylinder bodies of the four hydraulic cylinders 201 are all fixed on the base 101. The lower side of the housing 102 extends horizontally inward to form a bottom plate. The upper side of the bottom plate is fixedly connected to the lower side of the base 101, which can improve the connection strength between the housing 102 and the base 101. The upper side of the housing 102 extends horizontally outward to form a top plate. Support feet 103 are provided on the lower side of the four corners of the top plate to form a four-point support structure and improve the anti-overturning ability.

[0024] In use, this utility model uses four hydraulic cylinders 201, which are rectangularly distributed on the base 101, to extend and retract synchronously. This drives the piston rod to lift the frame 202 vertically and smoothly. The sloped platform 301, main roller 304, and auxiliary roller 305 simulate the actual ramp conditions. The drive motor 302 is rigidly integrated with the main frame 202a of the frame 202 via the connecting frame 202b. Its output shaft drives the main and auxiliary rollers 305 to rotate synchronously via the chain drive assembly 303. When a vehicle enters, the tires press into the rollers, and the lifting device 2 applies a simulated load. The braking performance is tested by the roller speed change and braking force sensor. The advantages of this utility model are as follows: a single roller chain 303a connects the main roller 304 and the auxiliary roller 305, and is driven by the same drive motor 302, ensuring that the linear speeds of the two rollers are strictly synchronized, avoiding errors in braking force testing caused by speed differences; the third sprocket 303d is displaced vertically by adjusting the screw 307, accurately adapting to the height difference at the roller shaft end caused by the slope, ensuring a smooth chain loop; the four cylinders are rectangularly distributed to form a planar statically determinate system with symmetrical support at the four corners, so that the weight and load of the frame 202 are evenly distributed during lifting, avoiding tilting and swaying, and the load is divided into four equal parts to reduce the risk of single-cylinder overload and extend service life. On the other hand, the vertical lifting accuracy reaches the millimeter level, ensuring accurate contact position between the tire and the roller, direct load transmission, fast response speed, and easy switching of working conditions.

[0025] The above description of the embodiments is only for the purpose of helping to understand the structure and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A vehicle loading, lifting, and braking test bench, comprising a base, a braking platform, and a loading and lifting device, characterized in that, The loading and lifting device is installed inside the base and is used to lift the braking platform. The braking platform includes a drive motor, a chain drive assembly, a main roller and an auxiliary roller installed inside the base. The drive motor is located directly below the main roller and the auxiliary roller. The shaft ends of the main roller and the auxiliary roller are connected to the output shaft of the drive motor via the chain drive assembly.

2. The vehicle loading, lifting, and braking test bench according to claim 1, characterized in that, The chain drive assembly includes a roller chain, a first sprocket, a second sprocket, a third sprocket, and a fourth sprocket. The roller chain sequentially engages with the lower meshing tooth surface of the first sprocket, the upper meshing tooth surface of the second sprocket, the lower meshing tooth surface of the third sprocket, and the upper meshing tooth surface of the fourth sprocket to form a closed drive chain. The first sprocket is coaxially and fixedly connected to the output shaft of the drive motor. The second sprocket is coaxially and fixedly connected to the shaft end of the main roller. The third sprocket is rotatably mounted on a fixed base. The fourth sprocket is coaxially and fixedly connected to the shaft end of the auxiliary roller.

3. The vehicle loading, lifting, and braking test bench according to claim 2, characterized in that, The braking platform also includes a sloping platform, which has windows corresponding to the main roller and the auxiliary roller. An adjusting screw is provided on the upper side of the fixed seat, and the adjusting screw is threadedly connected to the fixed sleeve. The fixed sleeve is provided on the lower side of the sloping platform. The main roller is located at the high slope of the sloping platform, and the auxiliary roller is located at the low slope of the sloping platform.

4. A vehicle loading, lifting, and braking test bench according to claim 1 or 3, characterized in that, The loading and lifting device includes four hydraulic cylinders arranged in a rectangular shape. The piston rod ends of the four hydraulic cylinders are fixedly connected to the frame. The housing of the drive motor is fixed on the frame. The two shaft ends of the main roller and the auxiliary roller are rotatably mounted on the frame through bearing seats.

5. The vehicle loading, lifting, and braking test bench according to claim 4, characterized in that, The frame includes two symmetrically distributed main frames. The output shaft of the drive motor is rotatably mounted on either main frame via a bearing seat. The drive motor housing is connected to either main frame as a whole via a connecting frame. Two symmetrically distributed crossbeams are provided between the two main frames. Support columns for abutting against the base are provided on the lower side of the crossbeams. Several connecting plates for fixed connection to the sloping platform are provided on the upper side of the crossbeams.

6. The vehicle loading, lifting, and braking test bench according to claim 4, characterized in that, The base includes a base and a housing surrounding the base. The cylinder bodies of the four hydraulic cylinders are all fixed on the base. The lower side of the housing extends horizontally inward to form a bottom plate. The upper side of the bottom plate is fixedly connected to the lower side of the base. The upper side of the housing extends horizontally outward to form a top plate. Support feet are provided on the lower sides of the four corners of the top plate.

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