Positioning aid for checking a motor vehicle speedometer

Abstract

The utility model relates to the field of motor vehicle calibration, disclose a kind of positioning auxiliary device for motor vehicle speedometer calibration, including detection table, the upper surface of the detection table is slidably connected with support seat, the upper surface of the support seat is fixedly connected with non-slip mat, the upper portion of the detection table is provided with support assembly, the top of the support seat is provided with speed roller shaft, the inside of the support seat is provided with positioning assembly;The support assembly includes motor, and the motor is arranged on the right surface of detection table.In the utility model, by setting support frame in support seat, tire can naturally fall into support frame recess when vehicle calibration, can intuitively prompt staff that vehicle has moved to measurement site, without frequent adjustment vehicle position, improve the measurement efficiency, support frame can be flexible longitudinal movement simultaneously, will not affect the calibration of vehicle speed, and roof can lift tire, facilitate car drive away, ensure the convenience of device.

Description

Technical Field

[0001] This utility model relates to the field of motor vehicle inspection, and in particular to a positioning auxiliary device for motor vehicle speedometer inspection. Background Technology

[0002] As a key measuring component in vehicle operation, the speedometer's accuracy directly affects the driver's judgment of speed, thus impacting road safety and compliance with traffic regulations. In scenarios such as vehicle production line testing, periodic safety inspections, and post-repair performance calibration, speedometers must be precisely calibrated using specialized equipment to ensure that the deviation between the displayed value and the vehicle's actual speed meets relevant national standards.

[0003] Currently, vehicle speedometer calibration mostly relies on a testing platform with a speed measuring roller. After the vehicle drives onto the testing platform, the drive wheels are placed above the speed measuring roller. The actual speed of the vehicle is calculated by the rotational speed of the roller and compared with the speedometer reading to complete the calibration process.

[0004] In this process, to ensure the accuracy of the verification results, the vehicle position needs to be fixed by a positioning auxiliary device to prevent the vehicle from shifting during the detection process, while ensuring that the drive wheel and the speed measuring roller shaft always maintain stable contact.

[0005] However, conventional vehicle speedometer calibration and positioning auxiliary devices still have shortcomings and cannot meet diverse calibration needs and efficient operation requirements. On the one hand, conventional devices do not have a positioning device to prompt the staff, which makes it difficult for the staff to judge whether to move to the measurement location. This leads to the need for frequent adjustments to the vehicle's position during measurement, thus affecting the detection efficiency. On the other hand, the support spacing of traditional positioning auxiliary devices is mostly a fixed structure, which cannot be flexibly adjusted according to the wheel track differences of different vehicle models, thus limiting the applicability of the device. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides a positioning auxiliary device for calibrating motor vehicle speedometers, which aims to improve the problems of the lack of positioning prompts in the prior art, which leads to frequent vehicle adjustments and the limited applicability of fixed support spacing.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a positioning auxiliary device for calibrating a motor vehicle speedometer, comprising a testing platform, a support base slidably connected to the upper surface of the testing platform, an anti-slip pad fixedly connected to the upper surface of the support base, a support assembly provided on the upper part of the testing platform, a speed measuring roller shaft provided at the top of the support base, and a positioning assembly provided inside the support base.

[0008] The support assembly includes a motor, which is mounted on the right surface of the testing platform. The output shaft of the motor is fixedly connected to a bidirectional threaded rod. A positioning block is threadedly connected to the outer wall of the bidirectional threaded rod. A hydraulic rod is provided on the inner wall of the bottom end of the positioning block. A connecting plate is fixedly connected to the upper surface of the hydraulic rod. A support plate is fixedly connected to the upper surface of the connecting plate. A top plate is fixedly connected to the upper surface of the support plate.

[0009] As a further description of the above technical solution:

[0010] The positioning component includes a support frame that is slidably connected to the inner wall of the support base. The lower surface of the support frame is elastically connected to the inner wall of the bottom end of the support base via a compression spring. Connecting rods are fixedly connected to the bottom ends of both sides of the support plate. Guide blocks are fixedly connected to the rear surfaces of the connecting rods. A guide plate is slidably connected to the inner wall of the support base, and a guide groove is formed through the inner wall of the guide plate.

[0011] As a further description of the above technical solution:

[0012] Both the front and rear ends of the testing platform are set as inclined surfaces, with the end closer to the testing platform facing upwards and the end farther away from the testing platform facing downwards.

[0013] As a further description of the above technical solution:

[0014] The positioning block is T-shaped and is slidably connected to the inner wall of the testing platform. The upper surface of the positioning block is fixedly connected to the lower surface of the support base.

[0015] As a further description of the above technical solution:

[0016] The output shaft of the hydraulic rod passes through the lower surface of the support base.

[0017] As a further description of the above technical solution:

[0018] The support frame is designed as a U-shape with the opening facing upwards, and the support plate is slidably connected to the inner wall of the support frame.

[0019] As a further description of the above technical solution:

[0020] The guide block is slidably connected to the inner wall of the guide groove.

[0021] As a further description of the above technical solution:

[0022] The lower half of the guide groove is vertical, and the upper half of the guide groove is gradually inclined downward from the end away from the support plate to the end close to the support plate.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, by setting a support frame inside the support base, the tires can naturally fall into the recess of the support frame during vehicle calibration, which can intuitively indicate to the staff that the vehicle has moved to the measurement location, eliminating the need for frequent adjustments to the vehicle position and improving measurement efficiency. At the same time, the support frame can move flexibly longitudinally without affecting the vehicle speed calibration, and the top plate can lift the tires, making it convenient for the car to drive away, ensuring the convenience of the device.

[0025] 2. In this utility model, the bidirectional threaded rod is driven by a motor to rotate, which drives two sets of positioning blocks and support seats to move in opposite directions or away from each other. The distance between the support seats can be flexibly adjusted to adapt to the wheel track differences of different vehicle models, thus improving the applicability of the device. Attached Figure Description

[0026] Figure 1 This is a front view of the three-dimensional structure of the overall device in this utility model;

[0027] Figure 2 This is a three-dimensional cross-sectional view of the testing platform in this utility model;

[0028] Figure 3 This is a three-dimensional cross-sectional view of the support base in this utility model;

[0029] Figure 4 This is a three-dimensional cross-sectional diagram of the support components and support frame in this utility model.

[0030] Legend:

[0031] 1. Testing table; 2. Support base; 3. Anti-slip mat; 4. Support assembly; 41. Motor; 42. Two-way threaded rod; 43. Positioning block; 44. Hydraulic rod; 45. Connecting plate; 46. Support plate; 47. Top plate; 5. Positioning assembly; 51. Support frame; 52. Compression spring; 53. Connecting rod; 54. Guide plate; 55. Guide groove; 56. Guide block; 6. Speed ​​measuring roller shaft. Detailed Implementation

[0032] 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.

[0033] Reference Figures 1-2This utility model provides an embodiment of a positioning auxiliary device for calibrating a motor vehicle speedometer, comprising a testing platform 1, which supports the overall device. A support base 2 is slidably connected to the upper surface of the testing platform 1, and an anti-slip pad 3 is fixedly connected to the upper surface of the support base 2. The anti-slip pad 3 can prevent the wheel from slipping and improve stability. The upper surfaces of the testing platform 1 and the support base 2 are flush. A support component 4 is provided on the upper part of the testing platform 1, which can support the wheel. A speed measuring roller 6 is provided at the top of the support base 2. The speed measuring roller 6 is prior art and can be implemented by those skilled in the art. Since it is prior art, it will not be described in detail in this case. The speed measuring roller 6 can rotate with the rotation of the wheel. The speed of the motor vehicle can be measured by the rotation speed of the speed measuring roller 6. A positioning component 5 is provided inside the support base 2.

[0034] Reference Figures 2-4 The support component 4 includes a motor 41, which is existing technology and can be implemented by those skilled in the art. As it is existing technology, it will not be described in detail in this case. The motor 41 is set on the right surface of the testing table 1. The output shaft of the motor 41 is fixedly connected to a bidirectional threaded rod 42. The outer wall of the bidirectional threaded rod 42 is threadedly connected to a positioning block 43. The outer wall of the bidirectional threaded rod 42 has two threaded grooves, which are symmetrically distributed about the center line of the bidirectional threaded rod 42. The inner wall of the bottom end of the positioning block 43 is provided with a hydraulic rod 44, which is existing technology and can be implemented by those skilled in the art. As it is existing technology, it will not be described in detail in this case. The upper surface of the hydraulic rod 44 is fixedly connected to a connecting plate 45. The upper surface of the connecting plate 45 is fixedly connected to a support plate 46. The upper surface of the support plate 46 is fixedly connected to a top plate 47 for lifting the tire.

[0035] Reference Figures 2-4 The front and rear ends of the testing platform 1 are both set as inclined surfaces to facilitate the driving of motor vehicles onto the testing platform 1. This device can measure the speed of front-wheel drive or rear-wheel drive vehicles. When measuring the speed, the driving wheel of the vehicle is placed on the speed measuring roller shaft 6, and the other tires are supported or fixed. The inclined surface is set so that the end closer to the testing platform 1 faces upward and the end farther away from the testing platform 1 faces downward. The positioning block 43 is set as a T-shape and is slidably connected to the inner wall of the testing platform 1. The upper surface of the positioning block 43 is fixedly connected to the lower surface of the support base 2. The positioning block 43 and the support base 2 can move left and right. The two sets of support bases 2 will move towards each other or away from each other to accommodate tires with different spacing. The output shaft of the hydraulic rod 44 passes through the lower surface of the support base 2.

[0036] Reference Figures 2-4The positioning component 5 includes a support frame 51. The lower surface of the top plate 47 contacts the bottom end of the inner surface of the support frame 51. The support frame 51 is slidably connected to the inner wall of the support base 2. The support frame 51 moves in the up and down direction. The lower surface of the support frame 51 is elastically connected to the inner wall of the bottom end of the support base 2 through a compression spring 52. When the support frame 51 moves down, it will squeeze the compression spring 52 to generate a reaction force. The bottom ends of the left and right sides of the support plate 46 are fixedly connected to connecting rods 53. The rear surface of the connecting rods 53 is fixedly connected to guide blocks 56. The inner wall of the support base 2 is slidably connected to a guide plate 54. The guide plate 54 is initially located directly below the support frame 51 and can provide support for the support frame 51. The inner wall of the guide plate 54 is provided with a guide groove 55. The guide block 56 and the guide groove 55 fit together.

[0037] Reference Figures 2-4 The support frame 51 is designed as an upward-facing U-shape, which can position the tire. When the car tire travels to the support frame 51, the tire will move to the recess on the support frame 51, which can remind the driver that the car has reached the correct position. The support plate 46 is slidably connected to the inner wall of the support frame 51. The guide block 56 is slidably connected to the inner wall of the guide groove 55. The lower half of the guide groove 55 is set to be vertical, and the upper half of the guide groove 55 is set to gradually slope downward from the end away from the support plate 46 to the end close to the support plate 46. When the guide block 56 moves longitudinally, it will squeeze the guide groove 55 and drive the guide plate 54 to move.

[0038] Working principle: When using this device, first adjust the distance between the two sets of support seats 2 according to the distance between the car tires. During adjustment, start the motor 41 to drive the bidirectional threaded rod 42 to rotate, which in turn drives the two sets of positioning blocks 43 and support seats 2 to expand or move closer together, so as to adjust the distance between the two sets of support seats 2.

[0039] After adjustment, drive the car to a suitable position so that the measured tire rests on the support frame 51. Then, fix the remaining tires. Then, activate the hydraulic rod 44 to move the connecting plate 45, support plate 46, and top plate 47 downwards. When the support plate 46 moves downwards, it will move the connecting rod 53 and guide block 56 simultaneously. When the guide block 56 moves downwards, it will first squeeze the inclined section of the guide groove 55, causing the two sets of guide plates 54 to open. When the lower surface of the top plate 47 contacts the bottom end of the inner surface of the support frame 51, the guide plate 54 will be misaligned with the support frame 51. At this time, the support frame 51 can move downwards. As the top plate 47 continues to move downwards, it will drive the guide block 56 to move downwards along the vertical section of the guide groove 55, and will also drive the support frame 51 to move downwards to compress the spring. Spring 52 generates a reaction force, causing the tire to fall onto the speed measuring roller 6. At this point, starting the car causes the tire to rotate, which in turn causes the speed measuring roller 6 to rotate, thus achieving speed measurement. After the speed measurement is completed, the hydraulic rod 44 is activated to move the connecting plate 45, support plate 46, and top plate 47 upward. The upward movement of the support plate 46 causes the connecting rod 53 and guide block 56 to move upward. The guide block 56 presses against the guide groove 55, causing the guide plate 54 to move in the opposite direction. Under the pushing action of the compressed spring 52, the support frame 51 gradually moves upward and contacts the tire. When in contact, the lower surface of the support frame 51 is flush with the upper surface of the guide plate 54, and gradually the top plate 47 lifts the tire, causing the tire to separate from the speed measuring roller 6. Then, the car can be driven off the testing platform 1.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A positioning auxiliary device for calibrating a motor vehicle speedometer, comprising a testing platform (1), characterized in that: The upper surface of the testing platform (1) is slidably connected to a support base (2), the upper surface of the support base (2) is fixedly connected to an anti-slip pad (3), the upper part of the testing platform (1) is provided with a support assembly (4), the top of the support base (2) is provided with a speed measuring roller shaft (6), and the inside of the support base (2) is provided with a positioning assembly (5). The support assembly (4) includes a motor (41), which is located on the right surface of the testing table (1). The output shaft of the motor (41) is fixedly connected to a bidirectional threaded rod (42). A positioning block (43) is threadedly connected to the outer wall of the bidirectional threaded rod (42). A hydraulic rod (44) is provided on the inner wall of the bottom end of the positioning block (43). A connecting plate (45) is fixedly connected to the upper surface of the hydraulic rod (44). A support plate (46) is fixedly connected to the upper surface of the connecting plate (45). A top plate (47) is fixedly connected to the upper surface of the support plate (46).

2. A positioning aid for checking a motor vehicle speedometer according to claim 1, characterized in that The positioning component (5) includes a support frame (51), which is slidably connected to the inner wall of the support base (2). The lower surface of the support frame (51) is elastically connected to the inner wall of the bottom end of the support base (2) through a compression spring (52). The bottom ends of the left and right sides of the support plate (46) are fixedly connected to connecting rods (53). The rear surface of the connecting rods (53) is fixedly connected to guide blocks (56). The inner wall of the support base (2) is slidably connected to a guide plate (54), and the inner wall of the guide plate (54) is provided with a guide groove (55).

3. A positioning aid for checking a motor vehicle speedometer according to claim 1, characterized in that: The front and rear ends of the testing platform (1) are both set as inclined surfaces, with the end closer to the testing platform (1) facing upwards and the end farther away from the testing platform (1) facing downwards.

4. A positioning aid for checking a motor vehicle speedometer according to claim 1, characterized in that: The positioning block (43) is T-shaped and is slidably connected to the inner wall of the detection table (1). The upper surface of the positioning block (43) is fixedly connected to the lower surface of the support base (2).

5. The positioning aid for checking a motor vehicle speedometer according to claim 1, characterized in that: The output shaft of the hydraulic rod (44) passes through the lower surface of the support base (2).

6. A positioning aid for checking a motor vehicle speedometer according to claim 2, characterized in that: The support frame (51) is configured as a U-shape with the opening facing upwards, and the support plate (46) is slidably connected to the inner wall of the support frame (51).

7. A positioning aid for checking a motor vehicle speedometer according to claim 2, characterized in that: The guide block (56) is slidably connected to the inner wall of the guide groove (55).

8. The positioning auxiliary device for calibrating a motor vehicle speedometer according to claim 2, characterized in that: The lower half of the guide groove (55) is vertical, and the upper half of the guide groove (55) is gradually inclined downward from the end away from the support plate (46) to the end close to the support plate (46).

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