Motor vehicle brake performance testing drum brake device

Abstract

The utility model discloses motor vehicle braking performance detection drum brake device, including detection stage, the movable groove is seted up in detection stage, the middle part of movable groove is fixed with the partition block, the drum that is symmetrically arranged on the partition block is relatively rotated in movable groove, still including the horizontal setting of guide groove in the partition block, the support shaft that is penetrated through the lateral wall of guide groove and is connected with one end of drum is relatively rotated and is equipped with in guide groove, the extrusion block is movably arranged in guide groove, be equipped with the friction assembly on extrusion block, be used for the friction deceleration of support shaft, the drive groove that is perpendicular to guide groove and is communicated with the bottom wall of guide groove in the partition block, be equipped with the drive assembly in drive groove, is used for the movement of extrusion block provides drive, the utility model belongs to motor vehicle detection technical field, and specifically refers to motor vehicle braking performance detection drum brake device.

Description

Technical Field

[0001] This utility model belongs to the field of motor vehicle testing technology, specifically referring to a roller brake device for testing the braking performance of motor vehicles. Background Technology

[0002] In the field of motor vehicle braking performance testing, roller brake devices have become the core equipment of vehicle testing stations due to their advantages of simulating road driving and accurately detecting braking parameters. When a vehicle test is completed or an emergency occurs, the rollers need to be stopped quickly to avoid the continuous rotation of the rollers causing safety hazards or affecting testing efficiency.

[0003] Traditional roller brake devices mostly adopt mechanical lever type or electromagnetic braking structure. Mechanical lever type requires manual operation, and the braking response is slow and the force is uneven, which can easily lead to the roller not stopping in time. Electromagnetic braking type is greatly affected by electromagnetic interference. In humid and dusty testing environments, the braking reliability is easily reduced, and the maintenance cost is high. Utility Model Content

[0004] The present invention aims to propose a roller brake device for testing the braking performance of motor vehicles to solve the above-mentioned technical problems.

[0005] To achieve the above functions, the technical solution adopted by this utility model is as follows: a motor vehicle braking performance testing roller brake device, including a testing platform, a movable groove is provided on the testing platform, a partition block is fixed in the middle of the movable groove, and rollers symmetrically arranged on the partition block are rotatably arranged in the movable groove; it also includes a guide groove horizontally arranged in the partition block, a support shaft rotatably arranged in the guide groove, penetrating the side wall of the guide groove and axially connected to one end of the roller, a pressing block is movably arranged in the guide groove, and a friction component is provided on the pressing block for frictional deceleration of the support shaft; a drive groove is perpendicular to the guide groove and communicates with the bottom wall of the guide groove in the partition block, and a drive component is provided in the drive groove for providing drive for the movement of the pressing block.

[0006] Furthermore, the friction assembly includes a friction sleeve and a friction plate. The friction sleeve is fixedly sleeved on the support shaft, and the friction plate is installed on the side wall of the extrusion block and is located close to the friction sleeve.

[0007] Preferably, the friction plate has an arc-shaped structure, and the curvature of the arc-shaped structure is adapted to the outer circumferential curvature of the friction sleeve.

[0008] Furthermore, the drive assembly includes an electric push rod and a movable block. The electric push rod is vertically mounted on the bottom wall of the drive groove, and the movable block is located at the top output end of the electric push rod. A connecting rod is hinged between the movable block and the extrusion block.

[0009] Furthermore, the side wall of the movable groove is provided with heat dissipation holes that communicate with the guide groove.

[0010] The beneficial effects of the above-mentioned structure of this utility model are as follows: The motor vehicle braking performance testing roller brake device provided by this utility model directly drives the movable block through an electric push rod, and quickly transmits power through a hinged connecting rod, pushing the extrusion block to move precisely in the guide groove, so that the friction plate and the friction sleeve on the support shaft can quickly contact each other; the arc-shaped friction plate and the friction sleeve have a high degree of fit, increasing the friction area. Combined with the stable thrust output of the electric push rod, the roller can be stopped evenly and efficiently, avoiding the problems of slow response and uneven force of traditional mechanical pull rod type. Moreover, compared with the defects of electromagnetic braking type which is easily affected by humid and dusty environments, this solution achieves stopping through mechanical structure transmission and friction braking, which is not affected by electromagnetic interference and is suitable for the complex environment of the testing scene. Attached Figure Description

[0011] Figure 1 This is an overall structural diagram of the motor vehicle braking performance testing roller brake device proposed in this utility model; Figure 2 This is a cross-sectional structural diagram of the roller brake device for testing the braking performance of motor vehicles proposed in this utility model; Figure 3 for Figure 1 Enlarged view of a portion of point A in the middle; Figure 4 This is a structural diagram of the extrusion block of the roller brake device for testing the braking performance of motor vehicles proposed in this utility model.

[0012] The components are as follows: 1. Testing platform, 2. Movable groove, 3. Separator block, 4. Roller, 5. Guide groove, 6. Support shaft, 7. Extrusion block, 8. Friction assembly, 9. Drive groove, 10. Drive assembly, 11. Friction sleeve, 12. Friction plate, 13. Electric push rod, 14. Movable block, 15. Connecting rod, 16. Heat dissipation hole. Detailed Implementation

[0013] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0014] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance, unless otherwise explicitly specified and limited. The terms "set," "install," "connect," and "link" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0015] The present invention will be further described in detail below with reference to the accompanying drawings.

[0016] like Figure 1 As shown, the motor vehicle braking performance testing roller brake device proposed in this utility model includes a testing platform 1, a movable groove 2 is provided on the testing platform 1, a partition block 3 is fixedly provided in the middle of the movable groove 2, and rollers 4 symmetrically arranged on the partition block 3 are rotatably arranged in the movable groove 2; the two sets of rollers 4 are used to support the motor vehicle tires for testing.

[0017] like Figure 2 and 4 As shown, it also includes a guide groove 5 horizontally arranged within the partition block 3. A support shaft 6, which passes through the side wall of the guide groove 5 and is axially connected to one end of the roller 4, is rotatably arranged within the guide groove 5. An extrusion block 7 is movably arranged within the guide groove 5. A friction assembly 8 is provided on the extrusion block 7 for frictional deceleration of the support shaft 6. The friction assembly 8 includes a friction sleeve 11 and a friction plate 12. The friction sleeve 11 is fixedly sleeved on the support shaft 6. The friction plate 12 is installed on the side wall of the extrusion block 7 and is located close to the friction sleeve 11. The friction plate 12 has an arc-shaped structure, and the curvature of the arc-shaped structure matches the outer circumferential curvature of the friction sleeve 11. When it is necessary to brake the roller 4, the drive assembly 10 is activated through the electronic control system, which drives the extrusion block 7 to move along the guide groove 5 and approach the support shaft 6, so that the friction plate 12 contacts the friction sleeve 11, and the support shaft 6 is braked by the friction sleeve 11.

[0018] like Figure 2As shown, a drive groove 9 is perpendicular to the guide groove 5 and communicates with the bottom wall of the guide groove 5 within the partition block 3. A drive assembly 10 is provided in the drive groove 9 to provide drive for the movement of the extrusion block 7. The drive assembly 10 includes an electric push rod 13 and a movable block 14. The electric push rod 13 is vertically installed on the bottom wall of the drive groove 9, and the movable block 14 is located at the top output end of the electric push rod 13. A connecting rod 15 is hinged between the movable block 14 and the extrusion block 7. The electric push rod 13 is started by the electric control system, which pushes the movable block 14 to move. The movable block 14 drives the connecting rod 15 to move and uses the connecting rod 15 to push the extrusion block 7 to move, thereby stopping the support shaft 6.

[0019] like Figure 1 and 3 As shown, the side wall of the movable groove 2 is provided with heat dissipation holes 16 that communicate with the guide groove 5. Multiple heat dissipation holes 16 can be provided to facilitate the dissipation of heat generated during friction braking and extend the service life of the friction plate 12.

[0020] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A roller brake device for testing the braking performance of motor vehicles, comprising a testing platform (1), wherein a movable groove (2) is provided on the testing platform (1), a partition block (3) is fixedly provided in the middle of the movable groove (2), and rollers (4) symmetrically arranged on the partition block (3) are rotatably disposed within the movable groove (2); characterized in that: It also includes a guide groove (5) horizontally arranged in the partition block (3), a support shaft (6) that rotates through the side wall of the guide groove (5) and is axially connected to one end of the roller (4) is provided in the guide groove (5), and an extrusion block (7) is movably arranged in the guide groove (5), and a friction component (8) is provided on the extrusion block (7) for frictional deceleration of the support shaft (6); The partition block (3) has a drive groove (9) that is perpendicular to the guide groove (5) and communicates with the bottom wall of the guide groove (5). The drive groove (9) is provided with a drive assembly (10) for providing drive for the movement of the extrusion block (7).

2. The motor vehicle braking performance testing roller brake device according to claim 1, characterized in that: The friction assembly (8) includes a friction sleeve (11) and a friction plate (12). The friction sleeve (11) is fixedly sleeved on the support shaft (6), and the friction plate (12) is installed on the side wall of the extrusion block (7) and is located close to the friction sleeve (11).

3. The motor vehicle braking performance testing roller brake device according to claim 2, characterized in that: The friction plate (12) has an arc-shaped structure, and the curvature of the arc-shaped structure is adapted to the outer circumferential curvature of the friction sleeve (11).

4. The motor vehicle braking performance testing roller brake device according to claim 1, characterized in that: The drive assembly (10) includes an electric push rod (13) and a movable block (14). The electric push rod (13) is vertically mounted on the bottom wall of the drive groove (9). The movable block (14) is located at the top output end of the electric push rod (13). A connecting rod (15) is hinged between the movable block (14) and the extrusion block (7).

5. The motor vehicle braking performance testing roller brake device according to any one of claims 1-4, characterized in that: The side wall of the movable groove (2) is provided with heat dissipation holes (16) that communicate with the guide groove (5).

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