A double-screw three-layer telescopic plate device

Abstract

This invention belongs to the field of vehicle inspection technology, specifically relating to a dual-screw three-layer telescopic plate device, including a front telescopic plate, a middle telescopic plate, and a rear telescopic plate, as well as a telescopic drive assembly and two parallel guide rails. The rear and middle telescopic plates are slidably mounted on the guide rails. The telescopic drive assembly includes a power mechanism, a first screw, and a second screw. The power mechanism is drivenly connected to the first screw, and the second screw is connected to the first screw via a coupling. The rear telescopic plate is fixedly connected to the screw nut seat of the first screw, and the middle telescopic plate is fixedly connected to the screw nut seat of the second screw. The lead of the first screw is greater than the lead of the second screw. This invention ensures that the middle telescopic plate is always maintained between the front and rear telescopic plates, achieving high-precision wheelbase adjustment.

Description

Technical Field

[0001] This invention relates to a double-screw three-layer telescopic plate device, belonging to the field of vehicle inspection technology. Background Technology

[0002] With the rapid development of new energy vehicles, and to cater to customers with different driving needs, the range of vehicle wheelbases is becoming increasingly wider, with mainstream wheelbases ranging from 1.6 meters to 3.2 meters. Due to the large variation in vehicle wheelbases, existing inspection platforms on vehicle testing production lines cannot accommodate such a wide range of wheelbases. Appropriate inspection platforms need to be adjusted according to the different wheelbases of the vehicles; otherwise, it will be impossible to ensure that vehicles with different wheelbases can be inspected and processed on the same production line.

[0003] To address this issue, a common approach is to use multi-layered traveling plates to meet the inspection needs of vehicles with varying wheelbases. Another solution is to create a three-layer telescopic plate structure, where all three layers can be fully retracted or extended to accommodate different types of vehicles with varying wheelbases. However, existing three-layer telescopic plates only have two rigid stops at the front and rear of the middle telescopic plate. While limiting plates at the front and rear ends of the middle plate restrict movement by blocking the roller bearings on the rear telescopic plate, the middle plate can slide freely on the rails. Although it extends or retracts using corresponding mechanical stops on the rear plate, it cannot be locked in place. This prevents synchronized extension and retraction. Furthermore, starting or braking of the vehicle's wheels on the telescopic plate causes it to shift, leading to abnormal noises or fatigue failure. If this shifting causes gaps between adjacent plates, it could even cause the vehicle's wheels to fall off or become stuck, significantly impacting the efficiency of the production line. Summary of the Invention

[0004] To address the aforementioned problems in the prior art, this invention provides a double-screw three-layer telescopic plate device. This device can achieve a wide range of shaft pitch adjustment and can lock the position of the telescopic plate to ensure that the telescopic plate does not easily move.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0006] A dual-screw three-layer telescopic plate device includes a front telescopic plate, a middle telescopic plate, and a rear telescopic plate, as well as a telescopic drive assembly and two parallel guide rails. The rear telescopic plate and the middle telescopic plate are slidably mounted on the guide rails. The telescopic drive assembly includes a power mechanism, a first screw, and a second screw. The power mechanism is drivenly connected to the first screw, and the second screw is connected to the first screw via a coupling. The rear telescopic plate is fixedly connected to the screw nut seat of the first screw, and the middle telescopic plate is fixedly connected to the screw nut seat of the second screw. The lead of the first screw is greater than the lead of the second screw.

[0007] Based on the above technical solution, the present invention can also be improved as follows:

[0008] Furthermore, both the first lead screw and the second lead screw are ball screws.

[0009] The beneficial effects of adopting the above-mentioned further solutions are: the ball screw has high efficiency, which improves the adjustment efficiency of the device.

[0010] Furthermore, the ratio of the lead of the first lead screw to the lead of the second lead screw is 2:1.

[0011] The beneficial effects of adopting the above-mentioned further solution are as follows: the ratio of the lead of the first lead screw to the lead of the second lead screw is 2:1, and the first lead screw and the second lead screw are connected by a coupling and driven by the same power mechanism. Under the same rotation speed of the power mechanism, the stroke of the intermediate telescopic plate is always half that of the rear telescopic plate, which ensures that the intermediate telescopic plate is always kept in the middle of the front telescopic plate and the rear telescopic plate, ensuring the uniform extension or retraction of the telescopic plate, realizing the movement and locking of the intermediate telescopic plate at any position, and enabling high-precision shaft distance adjustment.

[0012] Furthermore, it also includes a safety protection component, which includes an L-shaped plate, a movable pulley, and a wire rope. The L-shaped plate is fixedly installed on the outside of the housing of the power mechanism. The movable pulley is installed on the screw nut seat of the second screw. The wire rope passes around the movable pulley. One end of the wire rope is installed on the L-shaped plate, and the other end of the wire rope is fixedly installed on the screw nut seat of the first screw.

[0013] The beneficial effects of adopting the above-mentioned further solution are as follows: If either the second lead screw or the coupling malfunctions during the deployment of the telescopic plate, and the vehicle is traveling on the equipment while the intermediate telescopic plate is not fully deployed, the vehicle's wheels may fall off or get stuck. The steel wire rope and movable pulley of the safety protection component can ensure that the intermediate telescopic plate can be deployed normally. Since the power mechanism is still running at this time, the first lead screw rotates, and the lead screw nut of the first lead screw continues to move linearly along the first lead screw. The lead screw nut of the first lead screw will continue to pull the steel wire rope, thereby pulling the movable pulley to continue moving. The movable pulley is fixedly installed on the lead screw nut seat of the second lead screw. Therefore, the intermediate telescopic plate can be pulled to continue to deploy, ensuring driving safety.

[0014] Furthermore, the safety protection component also includes a tensioner, a spring, and a proximity switch. The proximity switch is mounted on the L-shaped plate. One end of the steel wire rope passes through the L-shaped plate and is connected to the tensioner. The tensioner is pressed against the L-shaped plate by a spring. The spring is pre-compressed to half of its travel during installation. The proximity switch detects the tension of the spring.

[0015] The beneficial effects of adopting the above-mentioned further solutions are as follows: by setting up tensioners, springs, and proximity switches, an alarm can be set in time when the telescopic drive assembly fails and causes the telescopic plate to fail to extend or retract normally. Since the wire rope is in a taut state, and the spring is pre-compressed to half of its stroke during installation, if the telescopic drive assembly fails and causes any telescopic plate to fail to move, the wire rope will also experience uncoordinated movement. For example, the wire rope may be further tightened to compress the spring, or the wire rope may be loosened to allow the spring to unfold. Thus, the proximity switch detects the spring's action and sets an alarm in time.

[0016] Furthermore, the intermediate telescopic plate includes a front panel, side panels, and a bottom plate. The bottom plate is located below the front panel, and the width of the bottom plate is greater than the width of the front panel. The side panels are located on both sides of the front panel, and the bottom of the side panels is fixedly connected to the bottom plate. The bottom plate is fixedly connected to the lead screw nut seat of the second lead screw, and the two sides of the bottom plate are slidably connected to the guide rail.

[0017] Furthermore, a mounting bracket is provided at the bottom of the end of the rear telescopic plate away from the middle telescopic plate. The two sides of the mounting bracket are slidably connected to the guide rail. The mounting bracket is fixedly connected to the detection hub device.

[0018] Furthermore, the bottom of the side plate of the intermediate telescopic plate is bent inward to form a slide, and the two sides of the rear telescopic plate near the end of the intermediate telescopic plate are provided with rear rollers, which are rotatably mounted on the slide.

[0019] The beneficial effect of adopting the above-mentioned further solutions is that the setting of the rear roller reduces the friction between the intermediate telescopic plate and the rear telescopic plate, making the extension and retraction of the rear telescopic plate smoother.

[0020] Furthermore, it also includes a fixed bracket, on which the front telescopic plate is fixedly mounted, and the fixed bracket is fixedly connected to the front detection hub device.

[0021] Furthermore, front rollers are provided on both sides of the front telescopic plate, and the bottom of the front rollers is flush with the top surface of the bottom plate of the middle telescopic plate.

[0022] The beneficial effect of adopting the above-mentioned further solutions is that the setting of the front roller reduces the friction between the middle telescopic plate and the front telescopic plate, making the extension and retraction of the middle telescopic plate smoother.

[0023] The beneficial effects of this invention are as follows:

[0024] This invention drives the expansion and contraction of the intermediate telescopic plate and the rear telescopic plate through a first lead screw and a second lead screw, and connects the two lead screws through a coupling. The lead of the first lead screw is greater than the lead of the second lead screw, so that the stroke of the rear telescopic plate is always greater than the stroke of the intermediate telescopic plate. This ensures that the intermediate telescopic plate is always kept between the front telescopic plate and the rear telescopic plate, and enables high-precision wheelbase adjustment. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the double lead screw three-layer telescopic plate device of the present invention;

[0026] Figure 2 for Figure 1 Enlarged view of point A;

[0027] Figure 3 This is a front view of the double lead screw three-layer telescopic plate device of the present invention;

[0028] Figure 4 This is a left view of the double lead screw three-layer telescopic plate device of the present invention;

[0029] Figure 5 This is a three-dimensional structural view of the double lead screw three-layer telescopic plate device of the present invention from another angle.

[0030] The attached diagram is labeled as follows: 1. Front telescopic plate; 2. Middle telescopic plate; 3. Rear telescopic plate; 4. Guide rail; 5. Power mechanism; 6. First lead screw; 7. Second lead screw; 8. Coupling; 9. L-shaped plate; 10. Moving pulley; 11. Steel wire rope; 12. Tensioner; 13. Spring; 14. Proximity switch; 15. Rear roller; 16. Front roller; 17. Mounting bracket; 18. Fixed bracket; 19. Rear detection hub device; 20. Front detection hub device. Detailed Implementation

[0031] The principles and features of the present invention are described below with reference to the accompanying drawings. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0032] like Figure 1-5 The aforementioned dual-screw three-layer telescopic plate device includes a front telescopic plate 1, a middle telescopic plate 2, and a rear telescopic plate 3. The middle telescopic plate 2 and the rear telescopic plate 3 can retract to below the front telescopic plate 1. It also includes a telescopic drive assembly and two parallel guide rails 4. The rear telescopic plate 3 and the middle telescopic plate 2 are slidably mounted on the guide rails 4. The telescopic drive assembly includes a power mechanism 5, a first lead screw 6, and a second lead screw 7. The power mechanism 5 is driven by the first lead screw 6 and is a servo motor. The output rod of the servo motor is driven by the first lead screw 6. The second lead screw 7 is connected to the first lead screw 6 via a coupling 8. The rear telescopic plate 3 is fixedly connected to the lead screw nut seat of the first lead screw 6, and the middle telescopic plate 2 is fixedly connected to the lead screw nut seat of the second lead screw 7. The lead of the first lead screw 6 is greater than the lead of the second lead screw 7.

[0033] Both the first lead screw 6 and the second lead screw 7 are ball screws, which are highly efficient and improve the adjustment efficiency of the device.

[0034] The ratio of the lead of the first lead screw 6 to the lead of the second lead screw 7 is 2:1. The first lead screw 6 and the second lead screw 7 are connected by a coupling 8 and driven by the same power mechanism 5. Under the same rotation speed of the power mechanism 5, the stroke of the intermediate telescopic plate 2 is always half that of the rear telescopic plate 3, which ensures that the intermediate telescopic plate 2 is always kept in the middle between the front telescopic plate 1 and the rear telescopic plate 3, ensuring the uniform extension or retraction of the telescopic plate, realizing the movement and locking of the intermediate telescopic plate 2 at any position, and enabling high-precision shaft distance adjustment.

[0035] See Figure 2It also includes a safety protection component, which includes an L-shaped plate 9, a movable pulley 10, a wire rope 11, a tensioner 12, a spring 13, and a proximity switch 14. The L-shaped plate 9 is fixedly installed on the outside of the housing of the power mechanism 5. The movable pulley 10 is installed on the screw nut seat of the second screw 7. The wire rope 11 passes around the movable pulley 10. One end of the wire rope 11 passes through the L-shaped plate 9 and is connected to the tensioner 12. The other end of the wire rope 11 is fixedly installed on the screw nut seat of the first screw 6. The tensioner 12 is pressed against the L-shaped plate 9 by the spring 13. The spring 13 is pre-compressed to half of its stroke during installation. The proximity switch 14 detects the tension of the spring 13. If either the second lead screw 7 or the coupling 8 malfunctions during the deployment of the telescopic plate, and the vehicle is traveling on the equipment while the intermediate telescopic plate 2 is not fully deployed, the vehicle's wheels may fall off or get stuck. The steel wire rope 11 and the movable pulley 10 of the safety protection component can ensure that the intermediate telescopic plate 2 can be deployed normally. Since the power mechanism 5 is still running at this time, the first lead screw 6 rotates, and the lead screw nut of the first lead screw 6 continues to move linearly along the first lead screw 6. The lead screw nut of the first lead screw 6 will continue to pull the steel wire rope 11, thereby pulling the movable pulley 10 to continue moving. The movable pulley 10 is fixedly installed on the lead screw nut seat of the second lead screw 7. Therefore, the intermediate telescopic plate 2 can be pulled to continue to deploy, ensuring driving safety. By using the tensioner 12, spring 13, and proximity switch 14, an alarm can be triggered in time when the telescopic drive assembly malfunctions, causing the telescopic plate to fail to extend or retract normally. Since the wire rope 11 is in a taut state, the spring 13 is pre-compressed to half of its stroke during installation. If the telescopic drive assembly malfunctions, causing any telescopic plate to fail to move, the wire rope 11 will also experience uncoordinated movement. For example, the wire rope 11 may further tighten and compress the spring 13, or the wire rope 11 may loosen and cause the spring 13 to unfold. Thus, the proximity switch 14 detects the action state of the spring 13 and triggers an alarm in time.

[0036] The intermediate telescopic plate 2 includes a front panel, side panels, and a bottom plate. The bottom plate is located below the front panel, and its width is greater than that of the front panel. The side panels are located on both sides of the front panel, and the bottom of the side panels is fixedly connected to the bottom plate. The bottom plate is fixedly connected to the lead screw nut seat of the second lead screw 7. The two sides of the bottom plate are slidably connected to the guide rail 4. A slider is provided at the bottom of the bottom plate, and the slider is slidably engaged with the guide rail 4. The bottom of the side panels of the intermediate telescopic plate 2 is bent inward to form a slide platform. The rear telescopic plate 3 has rear rollers 15 on both sides near one end of the intermediate telescopic plate 2. The rear rollers 15 are rotatably mounted on the slide platform (see...). Figure 4Multiple sets of rear rollers 15 can be set according to the length of the intermediate telescopic plate 2 and the rear telescopic plate 3. The setting of the rear rollers 15 reduces the friction between the intermediate telescopic plate 2 and the rear telescopic plate 3, making the extension and retraction of the rear telescopic plate 3 smoother.

[0037] See Figure 5 The bottom of the rear telescopic plate 3 away from the middle telescopic plate 2 is provided with a mounting bracket 17. The two sides of the mounting bracket 17 are slidably connected to the guide rail 4. The mounting bracket 17 is fixedly connected to the rear detection hub device 19.

[0038] See Figure 5 It also includes a fixed bracket 18, on which the front telescopic plate 1 is fixedly installed, and the fixed bracket 18 is fixedly connected to the front detection hub device 20.

[0039] The main function of the detection hub is to support the wheel and rotate with the wheel, providing the necessary detection environment for detecting the car wheel in a rolling state. The device of the present invention connects the rear detection hub device 19 and the front detection hub device 20 through the mounting bracket 17 and the fixing bracket 18 respectively, so that the device of the present invention can adapt to the wheel detection needs of car models with different wheelbases and realize the purpose of simultaneously detecting the front and rear wheels of the vehicle on the device.

[0040] The front telescopic plate 1 is provided with front rollers 16 on both sides, and the bottom of the front rollers 16 is flush with the top surface of the bottom plate of the middle telescopic plate 2. Multiple sets of front rollers 16 can be provided according to the length of the front telescopic plate 1 and the middle telescopic plate 2. The provision of front rollers 16 reduces the friction between the middle telescopic plate 2 and the front telescopic plate 1, making the extension and retraction of the middle telescopic plate 2 smoother.

[0041] The double-screw three-layer telescopic plate device of the present invention can meet the needs of vehicles with large wheelbase variations for detection and passage. It adopts a three-layer telescopic plate structure and uses two screws with different leads and the same motor for driving, which can realize functions such as precise control, positioning and self-locking. It can achieve uniform and synchronous extension and retraction of the three-layer telescopic plate. Compared with the existing multi-layer telescopic plates that use non-standard methods such as connecting rods or sliding limits, the present invention has the advantages of simple structure, low cost, reliable structure and simple assembly.

[0042] The device of the present invention is also equipped with a safety protection component, which can issue an alarm when the telescopic drive component malfunctions, and can also withstand a certain load to ensure that the intermediate telescopic plate 2 and the rear telescopic plate 3 do not detach, thus protecting the entire telescopic plate mechanism and making the equipment more intelligent, safe and reliable.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A double screw three layer telescopic plate device comprising a front telescopic plate, a middle telescopic plate and a rear telescopic plate, characterized in that, It also includes a telescopic drive assembly and two parallel guide rails. The rear telescopic plate and the middle telescopic plate are slidably mounted on the guide rails. The telescopic drive assembly includes a power mechanism, a first lead screw, and a second lead screw. The power mechanism is drivenly connected to the first lead screw, and the second lead screw is connected to the first lead screw via a coupling. The rear telescopic plate is fixedly connected to the lead screw nut seat of the first lead screw, and the middle telescopic plate is fixedly connected to the lead screw nut seat of the second lead screw. The lead of the first lead screw is greater than the lead of the second lead screw. The ratio of the lead of the first lead screw to the lead of the second lead screw is 2:1; The intermediate telescopic plate includes a front panel, side panels, and a bottom plate. The bottom plate is located below the front panel, and the side panels are located on both sides of the front panel. The bottom of the side panels is fixedly connected to the bottom plate. The bottom plate is fixedly connected to the lead screw nut seat of the second lead screw, and the two sides of the bottom plate are slidably connected to the guide rail. The bottom of the side plate of the intermediate telescopic plate is bent inward to form a slide. The rear telescopic plate is provided with rear rollers on both sides of the end near the intermediate telescopic plate. The rear rollers are rotatably mounted on the slide.

2. The double-screw three-layer telescopic plate device according to claim 1, characterized in that, Both the first lead screw and the second lead screw are ball screws.

3. The double-screw three-layer telescopic plate device according to claim 2, characterized in that, It also includes a safety protection component, which includes an L-shaped plate, a movable pulley, and a wire rope. The L-shaped plate is fixedly installed on the outside of the housing of the power mechanism. The movable pulley is installed on the screw nut seat of the second screw. The wire rope passes around the movable pulley. One end of the wire rope is installed on the L-shaped plate, and the other end of the wire rope is fixedly installed on the screw nut seat of the first screw.

4. The double-screw three-layer telescopic plate device according to claim 3, characterized in that, The safety protection component also includes a tensioner, a spring, and a proximity switch. The proximity switch is mounted on the L-shaped plate. One end of the steel wire rope passes through the L-shaped plate and is connected to the tensioner. The tensioner is pressed against the L-shaped plate by the spring. The proximity switch detects the tension of the spring.

5. The double-screw three-layer telescopic plate device according to claim 1, characterized in that, The bottom of the rear telescopic plate away from the middle telescopic plate is provided with a mounting bracket, and the two sides of the mounting bracket are slidably connected to the guide rail.

6. The double-screw three-layer telescopic plate device according to claim 1, characterized in that, It also includes a fixed bracket, on which the front telescopic plate is fixedly mounted.

7. The double-screw three-layer telescopic plate device according to claim 6, characterized in that, The front telescopic plate is provided with front rollers on both sides, and the bottom of the front rollers is flush with the top surface of the bottom plate of the middle telescopic plate.

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