A fixed device for testing a drum speedometer

Abstract

The utility model relates to the technical field of automobile speed measurement, disclose a kind of roller type speedometer inspection fixing device, including shell, the inner wall middle part of shell is fixedly connected with multiple hydraulic poles, the output end of the hydraulic pole is fixedly connected with support plate, the top of support plate is fixedly connected with lifting plate, the bottom of lifting plate is fixedly connected with piston rod, the outer wall sliding connection of piston rod is connected with piston cylinder, the inner wall of piston cylinder is fixedly connected with inner rod, the outer wall middle part of inner rod is fixedly connected with flow-through disc.In the utility model, by lifting plate descending, extruding piston rod slides down, make hydraulic oil overflow, block hole is blocked by block moving down, control lifting plate moving down speed, when lifting plate does not contact with wheel, flow-through disc lower side hydraulic oil pressure is greater than upper end, hydraulic oil flows upwards, drive sliding plate two to move up, block corresponding hole, reduce lifting plate ascending speed, reach the purpose of protecting lifting plate.

Description

Technical Field

[0001] This utility model relates to the field of automotive speed measurement technology, and in particular to a roller-type speedometer testing and fixing device. Background Technology

[0002] Vehicle speed measurement, or speedometer calibration, directly affects a driver's judgment of speed. When a speedometer has a significant error, a driver may unknowingly exceed the speed limit, posing a significant traffic safety hazard. Vehicle speed measurement accurately detects speedometer errors, prompting vehicle owners to promptly calibrate and repair inaccurate speedometers. This allows drivers to control their speed reasonably based on an accurate speedometer, preventing traffic accidents caused by speeding due to speedometer malfunction. Furthermore, it ensures the reliability of the vehicle's speed indication system, providing accurate reference for traffic enforcement in determining speeding violations and contributing to a safe and orderly traffic environment.

[0003] When measuring vehicle speed, in order to simulate actual conditions and reduce interference from external conditions, roller-type speedometer testing devices are often used. This device has the advantage of convenient centralized testing, as vehicles can drive onto the device in an orderly manner for testing, facilitating centralized and batch speed measurement and improving testing efficiency. However, in long-term use, due to the lack of protective measures for the lifting platform, the lifting platform is subjected to high loads for a long time, making it prone to damage, resulting in a reduced service life of the lifting platform and an increased cost of speed measurement. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a roller-type speedometer inspection and fixing device, which aims to improve the problem of easy damage to the lifting plate in the prior art.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a roller-type speedometer testing and fixing device, comprising a housing, a plurality of hydraulic rods fixedly connected to the middle of the inner wall of the housing, a support plate fixedly connected to the output end of the hydraulic rods, a lifting plate fixedly connected to the top of the support plate, a piston rod fixedly connected to the bottom of the lifting plate, a piston cylinder slidably connected to the outer wall of the piston rod, an inner rod fixedly connected to the inner wall of the piston cylinder, a flow plate fixedly connected to the middle of the outer wall of the inner rod, a sliding plate one slidably connected to the upper middle part of the outer wall of the inner rod, a plurality of blocking blocks one fixedly connected to the bottom of the sliding plate one, a sliding plate two slidably connected to the lower middle part of the outer wall of the inner rod, a plurality of blocking blocks two fixedly connected to the top of the sliding plate two, a sliding disc slidably connected to the outer wall of the inner rod near the edge, and an adjusting mechanism rotatably connected to the rear side of the inner wall of the housing, the adjusting mechanism being used to adjust the roller spacing.

[0006] As a further description of the above technical solution:

[0007] The adjusting mechanism includes multiple rear rollers, with the far ends of each rear roller rotatably connected to the rear side of the inner wall of the outer casing. Multiple sliding grooves are provided on the front side of the inner wall of the outer casing, and sliders are slidably connected to the inner walls of the sliding grooves. Front rollers are rotatably connected to adjacent sides of each slider, and connecting blocks are rotatably connected to adjacent ends of each front roller. A positioning hole is provided at the top of the connecting block, and a screw is rotatably connected to the front side of the connecting block. A screw hole is provided on the front side of the outer wall of the outer casing, and multiple limiting grooves are provided at the top of the outer casing. Limiting rods are engaged with the inner walls of the limiting grooves.

[0008] As a further description of the above technical solution:

[0009] A rotating ring is fixedly connected to the top of the limiting rod, and a rotating handle is fixedly connected to the front end of the screw.

[0010] As a further description of the above technical solution:

[0011] Each of the adjacent ends of the multiple rear rollers is fixedly connected to a coupling, and the inner wall of the positioning hole is slidably connected to the outer wall of the limiting rod near the edge.

[0012] As a further description of the above technical solution:

[0013] The outer wall of the outer shell has multiple positioning holes on the left side, and the inner wall of the outer shell has a connecting hole near the edge.

[0014] As a further description of the above technical solution:

[0015] The inner wall of the second positioning hole is threaded with a threaded rod, and a nameplate is slidably connected to the outer wall of the threaded rod near the edge.

[0016] As a further description of the above technical solution:

[0017] The nameplate has multiple threaded holes on its outer wall, and a gasket is slidably connected to the middle of the outer wall of the threaded rod.

[0018] As a further description of the above technical solution:

[0019] A support block is fixedly connected to the bottom end of the piston cylinder, and the bottom of the support block is fixedly connected to the inner wall of the outer shell.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, the lifting plate is raised by a hydraulic rod, the car is started and driven to the speed measuring position, and then the lifting plate descends and squeezes the piston rod to slide down in the piston cylinder, so that the hydraulic oil flows from the upper side of the circulation plate through the hole to the lower side. At the same time, the sliding plate moves down and the block block blocks the hole to control the flow speed of the hydraulic oil, thereby controlling the downward speed of the lifting plate. When the lifting plate moves down to the point where it is no longer in contact with the wheel, the hydraulic oil pressure on the lower side of the circulation plate is greater than that on the upper side, and the hydraulic oil flows upward, driving the sliding plate to move upward and block the corresponding hole, reducing the rising speed of the lifting plate. This achieves the purpose of preventing sudden changes in local force and thus protecting the lifting plate, extending the service life of the lifting plate, and reducing the speed measuring cost.

[0022] 2. In this utility model, when it is necessary to measure the speed of different vehicles, the distance adjustment mechanism is used to adjust the distance between the rollers to achieve the best speed measurement result. First, the limiting rod is slid upward by the rotating ring to disengage it from the positioning hole and the limiting groove. Then, by rotating the rotating handle, the screw on its rear side is driven. Through the cooperation between the screw and the limiting groove, the screw moves backward on the inner wall of the limiting groove, thereby driving the connecting block at the rear end of the screw to move backward synchronously. This causes the front rollers on both sides of the connecting block to move backward, shortening the distance between the front roller and the rear roller, thus achieving the purpose of adjusting the distance and increasing the practicality of the device. Attached Figure Description

[0023] Figure 1 This is a front perspective view of a roller-type speedometer testing and fixing device proposed in this utility model;

[0024] Figure 2 This is a partial structural exploded view of the outer shell of a roller-type speedometer testing and fixing device proposed in this utility model;

[0025] Figure 3 This is a partial structural diagram of the lifting plate of a roller-type speedometer testing and fixing device proposed in this utility model;

[0026] Figure 4 This is a partial structural diagram of the inner rod of a roller-type speedometer testing and fixing device proposed in this utility model;

[0027] Figure 5 This is a partial structural diagram of the limiting rod of a roller-type speedometer testing and fixing device proposed in this utility model;

[0028] Figure 6 This is a partial structural diagram of the nameplate of a roller-type speedometer testing and fixing device proposed in this utility model.

[0029] Legend:

[0030] 1. Outer shell; 2. Adjustment mechanism; 201. Rear roller; 202. Front roller; 203. Connecting block; 204. Positioning hole one; 205. Screw; 206. Slider; 207. Slide groove; 208. Limiting groove; 209. Screw hole; 210. Limiting rod; 3. Lifting plate; 4. Support plate; 5. Piston rod; 6. Piston cylinder; 7. Hydraulic rod; 8. Sliding plate one; 9. Block one; 10. Circulating plate; 11. Inner rod; 12. Sliding plate two; 13. Block two; 14. Slide plate; 15. Support block; 16. Rotary ring; 17. Nameplate; 18. Threaded rod; 19. Washer; 20. Threaded hole; 21. Positioning hole two; 22. Rotating handle; 23. Coupling; 24. Connecting hole. Detailed Implementation

[0031] 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.

[0032] Please see the appendix Figure 2 Appendix Figure 3 and attached Figure 4 This utility model provides an embodiment of a roller-type speedometer testing and fixing device, comprising a housing 1, a plurality of hydraulic rods 7 fixedly connected to the middle of the inner wall of the housing 1, a support plate 4 fixedly connected to the output end of the hydraulic rods 7, a lifting plate 3 fixedly connected to the top of the support plate 4, a piston rod 5 fixedly connected to the bottom of the lifting plate 3, a piston cylinder 6 slidably connected to the outer wall of the piston rod 5, an inner rod 11 fixedly connected to the inner wall of the piston cylinder 6, a flow plate 10 fixedly connected to the middle of the outer wall of the inner rod 11, a sliding plate 8 slidably connected to the upper middle part of the outer wall of the inner rod 11, a plurality of blocking blocks 9 fixedly connected to the bottom of the sliding plate 8, a sliding plate 12 slidably connected to the lower middle part of the outer wall of the inner rod 11, a plurality of blocking blocks 13 fixedly connected to the top of the sliding plate 12, a sliding disc 14 slidably connected to the outer wall of the inner rod 11 near the edge, and an adjusting mechanism 2 rotatably connected to the rear side of the inner wall of the housing 1, the adjusting mechanism 2 being used to adjust the roller spacing;

[0033] Specifically, four sets of hydraulic rods 7 are fixedly connected to the middle of the inner wall of the outer casing 1. The output ends of these hydraulic rods 7 are firmly and stably fixedly connected to the support plate 4, ensuring that the connection between the two will not loosen due to external forces. The top area of ​​the support plate 4 is tightly connected to the lifting plate 3 through a reliable fixing method. This connection method ensures the stability of the lifting plate 3 during movement. The bottom part of the lifting plate 3 is connected to the piston rod 5. The outer wall surface of the piston rod 5 and the piston cylinder 6 are in a sliding connection state. This sliding connection design ensures that the piston rod 5 can slide freely and smoothly in the piston cylinder 6 without affecting its movement performance due to excessive friction. The inner wall of the piston cylinder 6 is tightly connected to the inner rod 11 through a fixed method, ensuring that the connection between the two is firm and reliable. The middle of the outer wall of the inner rod 11 is firmly and stably fixedly connected to the circulation plate 10, ensuring the stability of the circulation plate 10 during movement. The upper part of the outer wall of the inner rod 11 is in a sliding connection with the sliding plate 8. This sliding connection design ensures that the sliding plate 8 can slide smoothly on the inner rod 11.

[0034] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 5 The adjusting mechanism 2 includes multiple rear rollers 201. The far ends of the multiple rear rollers 201 are rotatably connected to the rear side of the inner wall of the outer shell 1. Multiple sliding grooves 207 are provided on the front side of the inner wall of the outer shell 1. Sliding blocks 206 are slidably connected to the inner wall of the sliding grooves 207. Front rollers 202 are rotatably connected to the adjacent side of the multiple sliding blocks 206. Connecting blocks 203 are rotatably connected to the adjacent end of the multiple front rollers 202. A positioning hole 204 is provided on the top of the connecting block 203. A screw 205 is rotatably connected to the front side of the connecting block 203. A screw hole 209 is provided on the front side of the outer wall of the outer shell 1. Multiple limiting grooves 208 are provided on the top of the outer shell 1. A limiting rod 210 is engaged with the inner wall of the limiting groove 208.

[0035] Specifically, the adjusting mechanism 2 includes two rear rollers 201, which are spaced a certain distance apart. Their ends, which are far apart, are both securely rotatably connected to the rear inner wall of the outer casing 1. This connection ensures that the rear rollers 201 can rotate flexibly while maintaining overall stability. Multiple grooves 207 are provided on the front inner wall of the outer casing 1. The inner walls of these grooves 207 are slidably connected to the slider 206, allowing the slider 206 to slide freely within the grooves 207, thereby achieving the adjusting function. Multiple sliders 206 are connected to the corresponding front rollers 202 on their adjacent sides via a rotatable connection. This design ensures that the front rollers 202 rotate under the drive of the sliders 206. Multiple front rollers 202 are connected to the connecting block 203 on their adjacent sides via a rotatable connection, ensuring coordinated movement between the front rollers 202 and the connecting block 203. The top of the connecting block 203 is provided with a positioning hole 204, which is used to precisely fix the position of the connecting block 203 and ensure the precise adjustment of the entire adjusting mechanism 2.

[0036] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 3 A rotating ring 16 is fixedly connected to the top of the limiting rod 210, a rotating handle 22 is fixedly connected to the front end of the screw 205, a coupling 23 is fixedly connected to the adjacent ends of multiple rear rollers 201, the inner wall of the positioning hole 204 is slidably connected to the outer wall of the limiting rod 210 near the edge, and a support block 15 is fixedly connected to the bottom end of the piston cylinder 6, and the bottom of the support block 15 is fixedly connected to the inner wall of the outer shell 1.

[0037] Specifically, the top part of the limiting rod 210 is connected to a cleverly designed rotating ring 16 through a robust fixing method. The rotating ring 16 is designed to facilitate the operation of the limiting rod 210. The front end of the screw 205 is connected to a convenient rotating handle 22 through a reliable fixing method. The rotating handle 22 is ergonomically designed, making it easier and more comfortable for the user to operate. The adjacent ends of the multiple rear rollers 201 are all connected to efficient couplings 23 through a robust fixing method. These couplings 23 can ensure that the rear rollers 201 remain synchronized and stable during operation. The bottom part of the piston cylinder 6 is connected to a support block 15 through a robust fixing method. The support block 15 is designed to provide stable support force. The bottom of the support block 15 is connected to the inner wall of the outer casing 1 through a robust fixing method, ensuring that the entire device remains stable and reliable during operation.

[0038] Please see the appendix Figure 1 Appendix Figure 2 and attached Figure 6Multiple positioning holes 21 are provided on the left side of the outer wall of the outer shell 1. A connecting hole 24 is provided on the inner wall of the outer shell 1 near the edge. A threaded rod 18 is threadedly connected to the inner wall of the positioning hole 21. A nameplate 17 is slidably connected to the outer wall of the threaded rod 18 near the edge. Multiple threaded holes 20 are provided on the outer wall of the nameplate 17. A gasket 19 is slidably connected to the middle of the outer wall of the threaded rod 18.

[0039] Specifically, the outer casing 1 has two sets of positioning holes 21 on the left side of its outer wall. These positioning holes 21 are evenly distributed and designed for specific positioning functions. The inner wall of the outer casing 1 has a connecting hole 24 near its edge. This connecting hole 24 is mainly used to realize the connection of the internal structure. The positioning hole 21 is connected to the threaded rod 18 by a threaded connection on its inner wall, ensuring that the threaded rod 18 can be firmly fixed in the positioning hole 21. The outer wall of the threaded rod 18 is connected to the nameplate 17 near its edge, so that the position of the nameplate 17 is fixed. The outer wall of the nameplate 17 has two sets of threaded holes 20, which are used to connect with the threaded rod 18.

[0040] Working principle: When this device is needed to measure the speed of a car, the lifting plate 3 is first raised to a certain height by the hydraulic rods 7 on both sides of the bottom of the lifting plate 3. Then, the car is started and driven until the wheels pass through the lifting plate 3 and are between the rear roller 201 and the front roller 202. At this point, the speed measurement position is met. Then, the lifting plate 3 is lowered by activating the hydraulic rods 7. The descent of the lifting plate 3 compresses the piston rod 5 and makes it slide downward on the inner wall of the piston cylinder 6. The piston rod 5 slides down and compresses the hydraulic oil on the inner wall of the piston cylinder 6, causing it to flow from the upper side of the circulation plate 10 through the holes of the circulation plate 10 to the lower side of the circulation plate 10. The downward movement of the piston rod 5... The sliding plate 8 moves downward, causing the block 9 to block the corresponding hole on the flow plate 10, thereby controlling the speed of hydraulic oil flow and thus controlling the speed of the lifting plate 3 downward movement. This prevents the wheels from damaging the lifting plate 3 due to excessive downward movement. When the lifting plate 3 moves down to the point where it is no longer in contact with the wheels, the lifting plate 3 stops squeezing the piston rod 5, making the hydraulic oil pressure on the lower side of the flow plate 10 greater than that on the upper side. This allows the hydraulic oil to flow upward through the flow plate 10 and move the sliding plate 12 upward, blocking the corresponding hole on the flow plate 10 and reducing the upward speed. This prevents sudden changes in local force on the lifting plate 3 and protects the lifting plate 3 from damage.

[0041] When it is necessary to measure the speed of different vehicles, the distance adjustment mechanism 2 is used to adjust the distance between the rollers to achieve the best speed measurement result. First, the limiting rod 210 is slid upward by the rotating ring 16 to disengage it from the positioning hole 204 and the limiting groove 208. Then, by rotating the rotating handle 22, the screw 205 on its rear side is driven. Through the cooperation between the screw 205 and the limiting groove 208, the screw 205 moves backward on the inner wall of the limiting groove 208, thereby driving the connecting block 203 at the rear end of the screw 205 to move backward synchronously. This causes the front rollers 202 on both sides of the connecting block 203 to move backward, shortening the distance between the front rollers 202 and the rear rollers 201, thus achieving the purpose of adjusting the distance.

[0042] 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 roller-type speedometer testing and fixing device, comprising a housing (1), characterized in that: Multiple hydraulic rods (7) are fixedly connected to the middle of the inner wall of the outer shell (1). A support plate (4) is fixedly connected to the output end of the hydraulic rod (7). A lifting plate (3) is fixedly connected to the top of the support plate (4). A piston rod (5) is fixedly connected to the bottom of the lifting plate (3). A piston cylinder (6) is slidably connected to the outer wall of the piston rod (5). An inner rod (11) is fixedly connected to the inner wall of the piston cylinder (6). A flow plate (10) is fixedly connected to the middle of the outer wall of the inner rod (11). 1) A sliding plate 1 (8) is slidably connected to the upper part of the outer wall. Multiple blocking blocks 1 (9) are fixedly connected to the bottom of the sliding plate 1 (8). A sliding plate 2 (12) is slidably connected to the lower part of the outer wall of the inner rod (11). Multiple blocking blocks 2 (13) are fixedly connected to the top of the sliding plate 2 (12). A sliding disc (14) is slidably connected to the outer wall of the inner rod (11) near the edge. An adjusting mechanism (2) is rotatably connected to the rear side of the inner wall of the outer shell (1). The adjusting mechanism (2) is used to adjust the roller spacing.

2. The roller-type speedometer testing and fixing device according to claim 1, characterized in that: The adjusting mechanism (2) includes multiple rear rollers (201), with the far ends of the multiple rear rollers (201) rotatably connected to the rear side of the inner wall of the outer shell (1). Multiple sliding grooves (207) are provided on the front side of the inner wall of the outer shell (1). Sliding blocks (206) are slidably connected to the inner wall of the sliding grooves (207). Front rollers (202) are rotatably connected to the adjacent side of the multiple sliding blocks (206). Connecting blocks (203) are rotatably connected to the adjacent end of the multiple front rollers (202). A positioning hole (204) is provided on the top of the connecting block (203). A screw (205) is rotatably connected to the front side of the connecting block (203). A screw hole (209) is provided on the front side of the outer wall of the outer shell (1). Multiple limiting grooves (208) are provided on the top of the outer shell (1). A limiting rod (210) is engaged with the inner wall of the limiting groove (208).

3. The roller-type speedometer testing and fixing device according to claim 2, characterized in that: The top end of the limiting rod (210) is fixedly connected to a swivel ring (16), and the front end of the screw (205) is fixedly connected to a rotating handle (22).

4. The roller-type speedometer testing and fixing device according to claim 2, characterized in that: Each of the multiple rear rollers (201) is fixedly connected to a coupling (23) at one adjacent end, and the inner wall of the positioning hole (204) is slidably connected to the outer wall of the limiting rod (210) near the edge.

5. The roller-type speedometer testing and fixing device according to claim 1, characterized in that: The outer wall of the outer shell (1) has multiple positioning holes (21) on the left side, and the inner wall of the outer shell (1) has a connecting hole (24) near the edge.

6. The roller-type speedometer testing and fixing device according to claim 5, characterized in that: The inner wall of the second positioning hole (21) is threaded with a threaded rod (18), and the outer wall of the threaded rod (18) is slidably connected with a nameplate (17) near the edge.

7. The roller-type speedometer testing and fixing device according to claim 6, characterized in that: The nameplate (17) has multiple threaded holes (20) on its outer wall, and a gasket (19) is slidably connected to the middle of the outer wall of the threaded rod (18).

8. The roller-type speedometer testing and fixing device according to claim 1, characterized in that: The bottom end of the piston cylinder (6) is fixedly connected to a support block (15), and the bottom of the support block (15) is fixedly connected to the inner wall of the outer shell (1).

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