Wheel base adjusting assembly used for automobile detection bench

Abstract

According to the axle distance adjusting assembly for the automobile detection platform, the supporting end of the automobile detection platform is installed in a foundation pit below a reference plane, a lifting platform is installed at the supporting end, and two sets of front roller supports and two sets of rear roller supports are arranged on the lifting platform; roller groups corresponding to the wheels are mounted in the front roller bracket and the rear roller bracket; a first telescopic cylinder and a second telescopic cylinder are arranged on the two sides of the sliding table, the first telescopic cylinder is connected with the front roller support, and the second telescopic cylinder is connected with the sliding table. The adjusting range of the front and rear roller groups of the detection table is expanded, so that axle distance detection can also be performed on a long-axle-distance vehicle type, and short-distance adjustment of the two telescopic cylinders is more stable than long-distance adjustment of one telescopic cylinder; finally, a distance measuring assembly is arranged on the front side of the front roller support, non-contact long-distance measurement can be achieved, a telescopic cylinder is automatically controlled to work according to the measurement result to adjust the distance between the front roller set and the rear roller set, and convenience and rapidness are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile testing platforms, in particular to a wheelbase adjustment component used for an automobile testing platform. Background Art

[0002] At present, vehicle braking tests are divided into road tests and bench tests. Although road tests have faster test speeds and are closer to authenticity, road tests are required to be conducted on professional roads, which occupies a large area and has a high construction cost. They are also very susceptible to environmental impacts and have poor repeatability. They are only suitable for matching tests of certain models or random inspections of some cars, but not suitable for batch and regular inspections of cars. Compared with road tests, bench tests have a small footprint, low cost, and high safety performance, and are not affected by the environment during the inspection process.

[0003] The bench test usually uses a vehicle driving state simulation test bench, including two groups of roller devices arranged in front and behind, and each group of roller devices includes two groups of roller groups arranged at intervals, which are used to support the four wheels of the vehicle to be tested. The front and rear groups of roller devices are connected by a linkage assembly. For example, patent No. CN218330600U is a motor direct-driven internal gear rotary intelligent networked vehicle ABS test bench previously designed by the inventor. It can adjust the distance between the front roller group frame 3 and the rear roller group frame 4 through the retractable device 14 and the synchronous adjustment device 17, so as to adapt to the detection of vehicles with different wheelbases. However, there are certain limitations in use, the adjustment range is small, the wheelbase requirements of the tested vehicle are high, and vehicles with a larger wheelbase cannot be tested. There are certain limitations. Utility Model Content

[0004] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a wheelbase adjustment component for an automobile testing platform.

[0005] The technical solution of this utility model is as follows:

[0006] A wheelbase adjustment assembly for an automobile inspection platform, wherein the support end of the automobile inspection platform is installed in a foundation pit below a reference plane.

[0007] A lifting platform is installed on the support end, and two groups of front roller brackets and two groups of rear roller brackets are arranged on the lifting platform, and the front roller brackets and the rear roller brackets are both installed with roller groups corresponding to the wheels;

[0008] A sliding platform is arranged on the lifting platform between the front roller bracket and the rear roller bracket, and a first telescopic cylinder and a second telescopic cylinder are arranged on both sides of the sliding platform, the first telescopic cylinder is connected to the front roller bracket, and the second telescopic cylinder is connected to the sliding platform;

[0009] All roller groups are connected through a universal transmission assembly, and the universal transmission assembly can drive the roller groups to rotate synchronously and can extend or shorten along with the first telescopic cylinder and the second telescopic cylinder.

[0010] In order to facilitate the vehicle to enter and exit the test bench, the side of the front roller bracket away from the second telescopic cylinder is connected to the front axle, and the side of the rear roller bracket away from the second telescopic cylinder is connected to the rear axle, and both the front axle and the rear axle overlap the reference plane.

[0011] In order to improve the supporting strength of the front axle, a supporting frame is arranged at the bottom of the front axle, and the supporting frame is movably connected to the lifting platform.

[0012] In order to reduce the friction between the front axle and the reference plane and between the support frame and the lifting platform and improve the smoothness when adjusting the spacing, guide wheels are provided at the overlap position of the front axle and the reference plane and at the bottom of the support frame.

[0013] In order to extend the test bench after adjusting the wheelbase and facilitate the entry and exit of the car, the upper end of the front roller bracket close to the first telescopic cylinder is fixedly connected to a front sliding plate, and a front support plate for the sliding of the front sliding plate is fixedly connected to one side of the sliding table. The upper end of the sliding table away from the front support plate is fixedly connected to a rear sliding plate, and a rear support plate for the sliding of the rear sliding plate is fixedly connected to one side of the rear roller bracket.

[0014] In order to reduce the friction when the front sliding plate and the rear sliding plate slide and ensure smooth movement, guide wheels are installed on the side of the front sliding plate and the rear sliding plate away from the fixed end.

[0015] The specific design of the universal transmission assembly is that the universal transmission assembly includes two retractable universal joints, which are respectively connected to the front and rear roller groups through a T-shaped steering box, the two retractable universal joints are connected by a sprocket, and the retractable end of the universal joint close to the rear roller bracket is fixed to the sliding table.

[0016] In order to improve the stability when adjusting the spacing, two of the first telescopic cylinder and the second telescopic cylinder are provided and are symmetrically located on both sides of the universal transmission assembly.

[0017] In order to automatically detect the wheelbase of the vehicle and automatically control the extension of the telescopic cylinder to adjust the spacing between the roller groups, the wheelbase adjustment component also includes a controller. A distance measuring component is arranged above the reference plane close to the side of the front roller bracket, which can measure the wheelbase information of the vehicle passing thereunder and feed it back to the controller, and the first telescopic cylinder and the second telescopic cylinder are electrically connected to the controller.

[0018] The beneficial effects of the utility model are as follows: the utility model is a wheelbase adjustment component for an automobile inspection platform, which firstly, by setting four groups of roller groups installed in roller brackets, can be adapted to the four wheels of the vehicle to be inspected, and is used to support the wheels for automobile inspection; secondly, by setting the second telescopic cylinder, it is possible to drive the sliding platform and the front roller bracket to move, thereby realizing the primary adjustment of the distance between the front and rear roller groups; then, by setting the first telescopic cylinder, it is possible to drive the front roller bracket to move, thereby realizing the secondary adjustment of the distance between the front and rear roller groups, thereby expanding the adjustment range of the front and rear roller groups of the inspection platform, thereby allowing long-wheelbase vehicles to also be able to perform wheelbase inspection, and the short-distance adjustment of two telescopic cylinders is more stable than the long-distance adjustment of one telescopic cylinder; finally, by setting a distance measuring component on the front side of the front roller bracket, non-contact long-distance measurement can be realized, and the telescopic cylinder is automatically controlled to work according to the measurement result to adjust the distance between the front and rear roller groups, which is convenient and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0020] In the attached picture:

[0021] Figure 1 This is the first cross-sectional view of this scheme;

[0022] Figure 2 This is the second cross-sectional view of this scheme;

[0023] Figure 3 for Figure 2 Partial view;

[0024] Figure 4 This is a top view of the scheme;

[0025] Figure 5 A top view of the installation of the sliding plate and the support plate;

[0026] The components represented by the reference numerals in the figure are:

[0027] 1. Support end; 2. Reference plane; 3. Foundation pit; 4. Lifting platform; 5. Front roller bracket; 6. Rear roller bracket; 7. Roller group; 8. Sliding table; 9. First telescopic cylinder; 10. Second telescopic cylinder; 11. Universal transmission assembly; 111. Universal joint; 112. T-type steering box; 113. Sprocket; 12. Front axle; 13. Rear axle; 14. Support frame; 15. Guide wheel; 16. Front sliding plate; 17. Front support plate; 18. Rear sliding plate; 19. Rear support plate; 20. Distance measurement assembly. DETAILED DESCRIPTION

[0028] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings.

[0029] Example

[0030] As mentioned in the background technology, for the sake of convenience and cost saving, most of the tests on automobile performance use bench tests, specifically simulation test benches. The inventor has previously designed a test bench that can basically solve the problems existing in existing test benches, but there are still some defects. For example, the adjustable spacing between the front and rear roller groups 7 is small, and the wheelbase requirements for the vehicle to be tested are high, so that vehicles with larger wheelbases cannot be tested, and the scope of application is relatively small. Therefore, the inventor has improved on his previous technology and designed a new test bench, which is explained in detail below with reference to the drawings.

[0031] This embodiment provides a wheelbase adjustment assembly for an automobile test bench, see Figure 1-Figure 3 The support end 1 of the automobile testing platform is installed in a foundation pit 3 below the reference plane 2. The support end 1 is the base of the entire device and is used to support the test part. The specific description has been detailed in the previous patent of the inventor in the background technology, and no unnecessary details are given here. A lifting platform 4 is installed on the support end 1. The lifting platform 4 is driven by a lifting cylinder and can adjust the height of the test part. Two groups of front roller brackets 5 and two groups of rear roller brackets 6 are arranged on the lifting platform 4, and roller groups 7 corresponding to the wheels are installed in the front roller brackets 5 and the rear roller brackets 6. There are four groups of roller groups 7 in total, and each group has two rollers, which rotate synchronously.

[0032] What is different from the prior art, and also one of the main design points of this solution, is that a sliding platform 8 is arranged on the lifting platform 4 between the front roller bracket 5 and the rear roller bracket 6, and a first telescopic cylinder 9 and a second telescopic cylinder 10 are arranged on both sides of the sliding platform 8. The first telescopic cylinder 9 is connected to the front roller bracket 5, and can drive the front roller bracket 5 to move along the upper surface of the lifting platform 4. The second telescopic cylinder 10 is connected to the sliding platform 8, and can drive the sliding platform 8 to move, and then drive the sliding platform 8 through the universal transmission assembly 11.

[0033] Specifically, the front and rear four roller groups 7 are connected by a universal transmission assembly 11. Figure 3 and Figure 4, and the universal transmission assembly 11 can drive the roller group 7 to rotate synchronously and can be extended or shortened along with the first telescopic cylinder 9 and the second telescopic cylinder 10, wherein the universal transmission assembly 11 includes two telescopic universal joints 111, which are HA type telescopic precision universal joints, fixed by supporting bearings, and the two are respectively connected to the front and rear roller groups 7 through T-shaped steering boxes 112, and the two telescopic universal joints 111 are connected by sprockets 113, and the adjacent ends of the two are fixed to the sliding table 8, that is, the telescopic end of the universal joint 111 close to the rear roller bracket 6 is fixed to the sliding table 8, and the fixed end of the universal joint 111 close to the front roller bracket 5 is fixed to the sliding table 8, extending out The end is fixed to the front roller bracket 5, that is, the sliding table 8 is set to be hollow, the connecting ends of the two universal joints 111 are located in the sliding table 8, and the extended end of the universal joint 111 close to the rear roller bracket 6 is fixed to the sliding table 8. When the second telescopic cylinder 10 drives the sliding table 8 to move, it can drive the extended end of the universal joint 111 to extend, thereby realizing the adjustment of the distance of the sliding table 8, and then driving the front roller bracket 5 to move synchronously, realizing the first-level adjustment. Through the setting of the first telescopic cylinder 9, in conjunction with the universal joint 111, the movement of the front roller bracket 5 is realized, that is, the second-level adjustment. Compared with the setting of one telescopic cylinder, the extended ends of the two telescopic cylinders are shorter, and the strength and stability are higher.

[0034] It should be noted that, combined with Figure 5 The first telescopic cylinder 9 and the second telescopic cylinder 10 are both provided with two, and are symmetrically located on both sides of the universal transmission assembly 11, which can improve the stability and balance performance when adjusting the spacing.

[0035] On the basis of the above structure, a front axle 12 is connected to the side of the front roller bracket away from the second telescopic cylinder 10, and a rear axle 13 is connected to the side of the rear rollers away from the second telescopic cylinder 10, and the front axle 12 and the rear axle 13 are both overlapped with the reference plane 2, which facilitates the car to enter and exit the test bench, and a support frame 14 is arranged at the bottom of the front axle 12, and the support frame 14 is movably connected to the lifting platform 4, and guide wheels 15 are arranged at the overlap position of the front axle 12 and the reference plane 2 and at the bottom of the support frame 14, so as to improve the smoothness of the support frame 14 and the lifting platform and the front axle 12 and the reference plane 2 and reduce friction.

[0036] In addition, a front sliding plate 16 is fixedly connected to the upper end of the side of the front roller bracket 5 close to the first telescopic cylinder 9, a front supporting plate 17 for the sliding of the front sliding plate 16 is fixedly connected to one side of the sliding platform 8, a rear sliding plate 18 is fixedly connected to the upper end of the side of the sliding platform 8 away from the front supporting plate 17, and a rear supporting plate 19 for the sliding of the rear sliding plate 18 is fixedly connected to one side of the rear roller bracket 6. By providing two groups of sliding plates and two groups of supporting plates, when the sliding platform 8 moves, the rear sliding plate 18 can be driven to move along the rear supporting plate 19, and no gap will be generated between the two to affect the entry and exit of the vehicle. When the front roller bracket 5 moves, it can drive the front sliding plate 16 to move along the front supporting plate 17. In the horizontal direction, the two are always in an overlapping state to ensure the normal passage of the vehicle.

[0037] Based on the above structure, guide wheels 15 are installed on the side of the front sliding plate 16 and the rear sliding plate 18 away from the fixed end, which can reduce the friction when the front sliding plate 16 and the rear sliding plate 18 slide, ensure smooth movement, and adjust the spacing more quickly and conveniently.

[0038] In this embodiment, in order to automatically detect the wheelbase of the vehicle and automatically adjust the distance between the front and rear roller groups 7 to adapt to the wheelbase of the vehicle, the wheelbase adjustment component also includes a controller. A distance measuring component 20 is arranged above the reference plane 2 near the side of the front roller bracket 5. The distance measuring component 20 adopts a laser distance measuring unit and an infrared tester. The laser distance measuring unit is fixedly installed in front of the detection platform. A KTC linear displacement sensor is adopted and installed in front of the detection platform at a height of Ls (m) and Hs (m) from the ground. The infrared tester is installed on the front and rear sides of the detection platform, respectively. The two on the same side are arranged oppositely, and are equivalent to the laser distance measuring unit away from the detection platform. It can measure the wheelbase information of the vehicle passing below it and feed it back to the controller, and the first telescopic cylinder 9 and the second telescopic cylinder 10 are electrically connected to the controller, and the controller can control the start and shutdown of the first telescopic cylinder 9 and the second telescopic cylinder 10.

[0039] Specifically, before the car enters the test bench, the distance (p) between the most protruding point of the front of the vehicle and the distance measuring component 20 is obtained through the distance measuring component 20, and the rectangular coordinates are converted by the distance (polar radius) and the angle (polar angle). L=p*sin(θ) is the functional relationship between the direct coordinates and the polar coordinates, where θ is the angle between the extension direction of the distance p measured by the distance measuring component 20 and the vertical direction. Specifically, before the vehicle enters the test bench, the infrared tester scans the front wheel information and records the data when the front wheel contacts the infrared tester at this moment. The data measured by the laser distance measuring unit is specifically p and θ at this moment. L1 is calculated through the relationship, and the measurement continues. When the infrared tester scans the rear wheel information, L2 is calculated, and the vehicle wheelbase is calculated as L=L1-L2. After calculating the wheelbase of the vehicle, the received data is sent to the system controller, and the measurement and control system automatically sends instructions to the wheelbase adjustment component of the test bench, and adjusts the increase and decrease of the wheelbase by controlling the extension or retraction of the first telescopic cylinder 9 and the second telescopic cylinder 10. If L<5m, the measurement and control system controls the motor to move the second telescopic cylinder 10; if L>5m, the measurement and control system controls the second telescopic cylinder 10 to move to the maximum distance, and then calculates the distance that the first telescopic cylinder 9 needs to move: L'=L-5. The measurement and control system controls the first telescopic cylinder 9 to move the displacement of L'. Subsequently, the distance sensor information is collected to check whether the adjusted distance is equal to the current wheelbase. If not, continue to adjust until it is equal. Then start the performance test of the car.

Claims

1. A wheelbase adjustment assembly for an automobile inspection platform, wherein the support end (1) of the automobile inspection platform is installed in a foundation pit (3) below a reference plane (2), characterized in that: A lifting platform (4) is installed on the support end (1), and two groups of front roller brackets (5) and two groups of rear roller brackets (6) are arranged on the lifting platform (4), and the front roller brackets (5) and the rear roller brackets (6) are both installed with roller groups (7) corresponding to the wheels; A sliding platform (8) is arranged on the lifting platform (4) between the front roller bracket (5) and the rear roller bracket (6), and a first telescopic cylinder (9) and a second telescopic cylinder (10) are arranged on both sides of the sliding platform (8), the first telescopic cylinder (9) is connected to the front roller bracket (5), and the second telescopic cylinder (10) is connected to the sliding platform (8); All roller groups (7) are connected via a universal transmission assembly (11), and the universal transmission assembly (11) can drive the roller groups (7) to rotate synchronously and can extend or shorten along with the first telescopic cylinder (9) and the second telescopic cylinder (10).

2. The wheelbase adjustment assembly for a vehicle testing platform according to claim 1, characterized in that: A front axle (12) is connected to the side of the front roller bracket (5) away from the second telescopic cylinder (10), and a rear axle (13) is connected to the side of the rear rollers away from the second telescopic cylinder (10), and both the front axle (12) and the rear axle (13) overlap the reference plane (2).

3. The wheelbase adjustment assembly for a vehicle inspection platform according to claim 2, characterized in that: A support frame (14) is provided at the bottom of the front axle (12), and the support frame (14) is movably connected to the lifting platform (4).

4. The wheelbase adjustment assembly for a vehicle testing platform according to claim 3, characterized in that: Guide wheels (15) are provided at the overlap position between the front axle (12) and the reference plane (2) and at the bottom of the support frame (14).

5. The wheelbase adjustment assembly for a vehicle testing platform according to claim 1, characterized in that: A front sliding plate (16) is fixedly connected to the upper end of one side of the front roller bracket (5) close to the first telescopic cylinder (9), and a front supporting plate (17) for sliding of the front sliding plate (16) is fixedly connected to one side of the sliding platform (8).

6. The wheelbase adjustment assembly for a vehicle testing platform according to claim 5, characterized in that: A rear sliding plate (18) is fixedly connected to the upper end of the sliding platform (8) away from the front supporting plate (17), and a rear supporting plate (19) for sliding the rear sliding plate (18) is fixedly connected to one side of the rear roller bracket (6).

7. The wheelbase adjustment assembly for a vehicle testing platform according to claim 6, characterized in that: A guide wheel (15) is installed on one side of the front sliding plate (16) and the rear sliding plate (18) away from the fixed end.

8. The wheelbase adjustment assembly for a vehicle testing platform according to claim 1, characterized in that: The universal transmission assembly (11) comprises two telescopic universal joints (111), which are respectively connected to the front and rear roller groups (7) via a T-shaped steering box (112), the two universal joints (111) are connected via a sprocket (113), and the adjacent ends of the two are fixed to the sliding platform (8).

9. The wheelbase adjustment assembly for a vehicle testing platform according to claim 1, characterized in that: The first telescopic cylinder (9) and the second telescopic cylinder (10) are both provided in two pieces and are symmetrically located on both sides of the universal transmission assembly (11).

10. The wheelbase adjustment assembly for a vehicle testing platform according to claim 1, characterized in that: The wheelbase adjustment component also includes a controller. A distance measuring component (20) is arranged above the reference plane (2) on one side close to the front roller bracket (5), which can measure the wheelbase information of the vehicle passing below and feed it back to the controller. The first telescopic cylinder (9) and the second telescopic cylinder (10) are electrically connected to the controller.

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