New energy chassis dynamometer working face safety detection device

Abstract

The utility model relates to the technical field of automobile detection, in particular to a new energy chassis dynamometer working face safety detection device which comprises a bottom plate, a fixed plate and a sliding plate are arranged on the bottom plate, the fixed plate is fixedly connected with the bottom plate, and the sliding plate is in sliding fit with the bottom plate in the length direction of an automobile. The bottom plate is further provided with a first driving mechanism used for driving the sliding plate to act. A front vehicle-feeding vehicle-guiding plate is arranged on the bottom plate and located above the fixed plate, a rear vehicle-discharging vehicle-guiding plate is arranged on the sliding plate, the front vehicle-feeding vehicle-guiding plate and the rear vehicle-discharging vehicle-guiding plate are located on the same horizontal plane, and supporting rods are arranged on the opposite side faces between the front vehicle-feeding vehicle-guiding plate and the rear vehicle-discharging vehicle-guiding plate in a crossed mode; telescopic stand columns are arranged at the two corners of the front side of the front bicycle guiding plate and the two corners of the rear side of the rear bicycle guiding plate correspondingly, and correlation switches are arranged on the opposite side faces of the adjacent telescopic stand columns. Through the correlation switches arranged at different heights, an electronic fence function is formed, and an alarm can be given out in time for the mistaken entering situation in the detection process.

Description

Technical Field

[0001] This utility model relates to the field of automotive testing technology, specifically a safety testing device for the working surface of a new energy chassis dynamometer. Background Technology

[0002] An automotive chassis dynamometer is a specialized device that tests vehicle performance by simulating road resistance indoors. It is mainly used to measure the output power of the drive wheels, calibrate speedometers, and test acceleration performance.

[0003] Currently, dynamometers used in the market require at least one person to supervise the testing process to prevent accidental entry. Dynamometers have limited functionality and lack an accidental entry warning function. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a safety detection device for the working surface of a new energy chassis dynamometer.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A safety inspection device for the working surface of a new energy chassis dynamometer includes a base plate, on which a fixed plate and a sliding plate are provided. The fixed plate is fixedly connected to the base plate, and the sliding plate slides along the length of the vehicle with the base plate. The base plate is also provided with a first drive mechanism for driving the sliding plate. A forward vehicle guide plate is provided on the base plate and above the fixed plate, and a rear vehicle guide plate is provided on the sliding plate. The forward vehicle guide plate and the rear vehicle guide plate are on the same horizontal plane, and support rods are intersecting on the opposite sides of the forward vehicle guide plate and the rear vehicle guide plate.

[0007] Telescopic columns are installed at the two front corners of the leading plate of the forward vehicle and the two rear corners of the leading plate of the rear vehicle. Opposite-to-opposite switches are installed on the opposite sides of adjacent telescopic columns.

[0008] A first roller group is slidably arranged on a fixed plate along the length of the vehicle. A first window is opened on the leading plate of the forward vehicle, which is opposite to the first roller group, so that the roller surface of the first roller group protrudes upward from the leading plate of the forward vehicle by a certain height. A second roller group is slidably arranged on a sliding plate along the length of the vehicle. A second window is opened on the leading plate of the rear vehicle, which is opposite to the second roller group, so that the roller surface of the second roller group protrudes upward from the leading plate of the rear vehicle by a certain height.

[0009] As a preferred embodiment, a further technical solution of this utility model is:

[0010] Preferably, multiple sets of photoelectric switches are installed at different height positions on the telescopic column.

[0011] Preferably, the first roller group includes a first sliding support frame and a second sliding support frame arranged opposite to each other. A positive and negative threaded screw is threadedly connected between the first and second sliding support frames, and the positive and negative threaded screw is driven by a roller gap adjustment servo motor. A first rotating shaft is rotatably mounted on the first sliding support frame, and a left front roller and a right front roller are mounted on the first rotating shaft. A second rotating shaft is rotatably mounted on the second sliding support frame, and a left rear roller and a right rear roller are mounted on the second rotating shaft. An eddy current motor is provided on the first sliding support frame and driven by the first rotating shaft. Both the first and second sliding support frames are provided with electromagnetic brakes for braking the rotating shafts.

[0012] Preferably, a first support rod is provided horizontally forward on the upper part of the first sliding support frame, a first support plate is provided vertically on the first support rod, the top surface of the first support plate is flush with the upper surface of the forward vehicle guide plate, and a first transition plate is provided horizontally on the top surface of the first support plate, the first transition plate is placed on the upper surface of the forward vehicle guide plate.

[0013] The second sliding support frame extends horizontally backward at its upper part and is provided with a second support rod. A second support plate is vertically provided on the second support rod. The top surface of the second support plate is flush with the upper surface of the forward vehicle guide plate. A second transition plate is horizontally provided on the top surface of the second support plate and is placed on the upper surface of the forward vehicle guide plate.

[0014] Preferably, the structure of the second roller group is the same as that of the first roller group.

[0015] Preferably, a lifting mechanism is provided on both the fixed plate and the sliding plate located at the middle position of the first roller group.

[0016] Preferably, the lifting mechanism includes a lifting fixed seat, a lifting cylinder is vertically arranged on the lifting fixed seat, and fixed sleeves are vertically arranged on both sides of the lifting cylinder on the lifting fixed seat. A guide sleeve is slidably inserted in the fixed sleeve, and a support beam is horizontally arranged between the top end of the guide sleeve and the top end of the piston rod of the lifting cylinder.

[0017] Preferably, the top surface of the support beam is a concave arc surface.

[0018] Preferably, a support column is provided on the leading plate of the forward vehicle, a connecting frame is horizontally provided at the top of the support column, a sliding rod is slidably provided on the connecting frame along the length of the vehicle, a spray pipe is installed at the bottom of the sliding rod, and a second drive mechanism for driving the sliding rod is provided on the connecting frame.

[0019] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0020] By using photoelectric switches set at different heights, an electronic fence function is formed, which can promptly alarm for unauthorized entry during the detection process. In addition, by adjusting the distance between the first roller group and the second roller group, the wheelbase size of different vehicle models can be adapted. By adjusting the spacing between the first sliding support frame and the second sliding support frame, the spacing between the rollers can be adjusted to adapt to the tire size of different vehicle models. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the safety detection device for the working surface of the new energy chassis dynamometer in this embodiment of the utility model. Figure 1 ;

[0022] Figure 2 This is a three-dimensional structural diagram of the safety detection device for the working surface of the new energy chassis dynamometer in this embodiment of the utility model. Figure 2 ;

[0023] Figure 3 This is a top view of the safety detection device for the working surface of the new energy chassis dynamometer in this embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the main structure of the safety detection device for the working surface of the new energy chassis dynamometer in this embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the roller assembly in an embodiment of this utility model;

[0026] Figure 6 This is a schematic diagram of the lifting mechanism in an embodiment of this utility model;

[0027] Figure 7 This is a structural schematic diagram of the telescopic column part in an embodiment of this utility model.

[0028] Explanation of reference numerals in the attached drawings: 1. Base plate; 2. Fixed plate; 3. Sliding plate; 4. First drive mechanism; 5. Forward vehicle guide plate; 6. Rear vehicle guide plate; 7. Support rod; 8. Telescopic column; 9. Through-beam switch; 10. First roller group; 11. First window; 12. Second roller group; 13. Second window; 14. Portal support frame; 15. First sliding support frame; 16. Second sliding support frame; 17. Positive and negative threaded screw; 18. Roller gap adjustment servo motor; 19. First 20. Rotating shaft; 21. Left front roller; 22. Right front roller; 23. Second rotating shaft; 24. Left rear roller; 25. Right rear roller; 26. Eddy current machine; 27. Electromagnetic brake; 28. First support rod; 29. ​​First support plate; 30. First transition plate; 31. Second support rod; 32. Second transition plate; 33. Lifting mechanism; 34. Lifting fixed seat; 35. Lifting cylinder; 36. Fixed sleeve; 37. Guide sleeve; 38. Support beam. Detailed Implementation

[0029] The present invention will be further described below with reference to specific embodiments. The purpose of this description is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0030] like Figures 1 to 7 As shown in the figure, this embodiment provides a safety inspection device for the working surface of a new energy chassis dynamometer, including a base plate 1, a fixed plate 2 and a sliding plate 3 on the base plate 1, the fixed plate 2 being fixedly connected to the base plate 1, the sliding plate 3 slidingly engaging with the base plate 1 along the vehicle length direction, and a first drive mechanism 4 for driving the sliding plate 3 to move on the base plate 1; a forward vehicle guide plate 5 is provided on the base plate 1 and above the fixed plate 2, and a rear vehicle guide plate 6 is provided on the sliding plate 3, the forward vehicle guide plate 5 and the rear vehicle guide plate 6 are on the same horizontal plane, and support rods 7 are cross-arranged on the opposite sides between the forward vehicle guide plate 5 and the rear vehicle guide plate 6;

[0031] Telescopic columns 8 are installed at the two front corners of the forward vehicle guide plate 5 and the two rear corners of the rear vehicle guide plate 6. Opposite-to-opposite switches 9 are installed on the opposite sides of adjacent telescopic columns 8.

[0032] A first roller group 10 is slidably arranged on the fixed plate 2 along the length of the vehicle. A first window 11 is opened on the forward guide plate 5 opposite to the first roller group 10, so that the roller surface in the first roller group 10 protrudes upward from the forward guide plate 5 by a certain height. A second roller group 12 is slidably arranged on the sliding plate 3 along the length of the vehicle. A second window 13 is opened on the rear exit guide plate 6 opposite to the second roller group 12, so that the roller surface in the second roller group 12 protrudes upward from the rear exit guide plate 6 by a certain height.

[0033] In implementation, the first drive mechanism 4 can be implemented using a conventional servo motor to drive a lead screw pair structure. During the adjustment process, the wheelbase can be determined based on the distance between the middle position of the first roller group 10 and the middle position of the second roller group 12. After the wheelbase is adjusted, the distance between the front and rear rollers in the first roller group 10 and the distance between the front and rear rollers in the second roller group 12 are adjusted to adapt to different tire sizes. Sliding fit can be achieved through conventional slide rail and slider structure. A portal support frame 14 can also be set on the base plate 1 and located below the support rod 7 to enhance the support strength; the main body of the telescopic column 8 can adopt a hollow structure with an open bottom, and the through-beam switch 9 is embedded in the surface of the telescopic column 8. The main body of the telescopic column is driven by the telescopic column cylinder.

[0034] In implementation, multiple sets of photoelectric switches 9 are installed at different heights on the telescopic column 8. Specifically, the telescopic column 8 is designed to be 1 meter high, with photoelectric switches 9 installed in three sections. The photoelectric switches 9 are linked to the audible and visual alarms based on conventional electrical control principles, and will promptly sound an alarm when a person or object accidentally enters during the detection process. The photoelectric switches 9 at different heights form an electronic fence function, which can promptly alarm for accidental entry during the detection process. In implementation, when not being detected, the telescopic column 8 is hidden in the guide plate. When started, it automatically rises, blocking different sections of the photoelectric switches from triggering different effects. For example, simultaneously triggering the lower two sections will trigger an audible alarm, while triggering the highest section of the photoelectric switch indicates that someone has accidentally entered, triggering both an audible and visual alarm. The photoelectric switches at all four positions are linked to independent audible and visual alarms, so that managers can determine which direction the accidental entry is from based on the location of the audible and visual alarms.

[0035] In practice, the market offers a wide range of car models, from microcars to large cars, to meet the needs of different car owners. Different car sizes have different wheelbases and tire sizes. For example, the smallest existing microcars have a wheelbase of around 2 meters and 12-inch tires; large cars can have a wheelbase of 3 meters and tires of 22 inches or even larger. Small tires may be suspended or have poor contact on wide-spacing rollers, resulting in poor power transmission. Large tires may experience severe compression and deformation on narrow-spacing rollers, with additional resistance masking the true power and affecting detection accuracy. Furthermore, mismatched tire-roller spacing can easily lead to slippage. To address this, the first roller group 10 and the second roller group 12 in this invention employ an adjustable roller spacing structure. Specifically:

[0036] The first roller assembly 10 includes a first sliding support frame 15 and a second sliding support frame 16 arranged opposite to each other. A positive and negative threaded screw 17 is threaded between the first sliding support frame 15 and the second sliding support frame 16. The positive and negative threaded screw 17 is driven by a roller gap adjustment servo motor 18. A first rotating shaft 19 is rotatably arranged on the first sliding support frame 15. A left front roller 20 and a right front roller 21 are mounted on the first rotating shaft 19. A second rotating shaft 22 is rotatably arranged on the second sliding support frame 16. A left rear roller 23 and a right rear roller 24 are mounted on the second rotating shaft 22. An eddy current motor 25 is arranged on the first sliding support frame 15 and driven by the first rotating shaft 19. An electromagnetic brake 26 for braking the rotating shaft is arranged on both the first sliding support frame 15 and the second sliding support frame 16.

[0037] The roller diameter is designed to be 200-300mm. During adjustment, the roller gap adjustment servo motor 18 drives the positive and negative threaded screws 17 to rotate, thereby causing the first sliding support frame 15 and the second sliding support frame 16 to move closer or further apart synchronously to complete the adjustment. The degree of adjustment can be determined according to the tire size; for example, the distance between the centers of the front and rear rollers is approximately 0.8-0.9 times the tire diameter. The electromagnetic brake 26 can be fitted in the middle of the rotating shaft to brake and stop the rollers when the vehicle enters or exits the roller assembly.

[0038] Eddy current machine 25 is a device that uses the principle of electromagnetic induction to generate torque and power consumption. Eddy current dynamometer is based on the eddy current effect, that is, when a block metal conductor is placed in a changing magnetic field or when a block metal conductor cuts magnetic lines of force in a magnetic field, a vortex-shaped induced current will be generated in the block metal conductor, which is called eddy current.

[0039] In practice, a first support rod 27 is horizontally extended forward on the upper part of the first sliding support frame 15, and a first support plate 28 is vertically arranged on the first support rod 27. The top surface of the first support plate 28 is flush with the upper surface of the forward vehicle guide plate 5, and a first transition plate 29 is horizontally arranged on the top surface of the first support plate 28. The first transition plate 29 is placed on the upper surface of the forward vehicle guide plate 5.

[0040] The second sliding support frame 16 extends horizontally backward at its upper part and is provided with a second support rod 30. A second support plate 31 is vertically provided on the second support rod 30. The top surface of the second support plate 31 is flush with the upper surface of the forward vehicle guide plate 5. A second transition plate 32 is horizontally provided on the top surface of the second support plate 31. The second transition plate 32 is placed on the upper surface of the forward vehicle guide plate 5.

[0041] Adding a transition plate structure can fill the space between the roller and the guide plate, making it easier for vehicles to enter or exit the roller assembly (especially for vehicles with small tires).

[0042] The structure of the second roller group 12 is the same as that of the first roller group 10, and will not be described again here.

[0043] In practice, lifting mechanisms 33 are provided on the fixed plate 2 and located in the middle of the first roller group 10, and on the sliding plate 3 and located in the middle of the second roller group 12.

[0044] Specifically, the lifting mechanism 33 includes a lifting fixed base 34, on which a lifting cylinder 35 is vertically mounted. Fixed sleeves 36 are vertically mounted on both sides of the lifting cylinder 35 on the lifting fixed base 34. A guide rod 37 is slidably inserted into the fixed sleeve 36. A support beam 38 is horizontally mounted between the top of the guide rod 37 and the top of the piston rod of the lifting cylinder 35. The top surface of the support beam 38 is a concave arc surface, and an anti-slip rubber pad can be attached to the top surface to prevent slippage.

[0045] The lifting mechanism 33 can be used to slightly lift the vehicle to a certain height before it drives out of the roller assembly, making it easier for the vehicle to drive out.

[0046] During vehicle inspection, after determining the wheelbase and tire size based on the vehicle model, the first drive mechanism 4 moves the sliding plate 3, thereby adapting the distance between the first roller group 10 and the second roller group 12 to the wheelbase size. Specifically, the distance between the midpoint of the first sliding support frame 15 and the second sliding support frame 16 in the first roller group 10 and the midpoint of the first sliding support frame 15 and the second sliding support frame 16 in the second roller group 12 matches the wheelbase size. Subsequently, the roller gap adjustment servo motor 18 drives the positive and negative threaded screws 17 to rotate, from... Simultaneously, the first sliding support frame 15 and the second sliding support frame 16 move closer or further apart, so that the roller spacing is adapted to the tire size. After the adjustment is completed, the vehicle drives in, specifically the front wheels drive into the first roller group 10 and the rear wheels drive into the second roller group 12. After driving in, a conventional anti-climb roller structure is placed in front of the tires to further prevent the vehicle from accidentally falling out and causing danger. Then, the telescopic column 8 is raised and the photoelectric switch 9 is activated. Finally, the vehicle is inspected. After the inspection is completed, the lifting mechanism 33 slightly lifts the vehicle to a certain height, making it easier for the vehicle to drive out and complete the inspection.

[0047] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A safety detection device for the working surface of a new energy chassis dynamometer, characterized in that, The vehicle includes a base plate, on which a fixed plate and a sliding plate are provided. The fixed plate is fixedly connected to the base plate, and the sliding plate slides along the length of the vehicle with the base plate. The base plate is also provided with a first drive mechanism for driving the sliding plate. A forward vehicle guide plate is provided on the base plate and above the fixed plate, and a rear vehicle guide plate is provided on the sliding plate. The forward vehicle guide plate and the rear vehicle guide plate are on the same horizontal plane, and support rods are intersecting on the opposite sides of the forward vehicle guide plate and the rear vehicle guide plate. Telescopic columns are installed at the two front corners of the leading plate of the forward vehicle and the two rear corners of the leading plate of the rear vehicle. Opposite-to-opposite switches are installed on the opposite sides of adjacent telescopic columns. A first roller group is slidably arranged on a fixed plate along the length of the vehicle. A first window is opened on the leading plate of the forward vehicle, which is opposite to the first roller group, so that the roller surface of the first roller group protrudes upward from the leading plate of the forward vehicle by a certain height. A second roller group is slidably arranged on a sliding plate along the length of the vehicle. A second window is opened on the leading plate of the rear vehicle, which is opposite to the second roller group, so that the roller surface of the second roller group protrudes upward from the leading plate of the rear vehicle by a certain height.

2. The safety detection device for the working surface of the new energy chassis dynamometer according to claim 1, characterized in that, Multiple sets of photoelectric switches are installed at different heights on the telescopic column.

3. The safety detection device for the working surface of the new energy chassis dynamometer according to claim 1, characterized in that, The first roller assembly includes a first sliding support frame and a second sliding support frame arranged opposite to each other. A screw threaded with positive and negative threads is threaded between the first and second sliding support frames, and the screw threaded with positive and negative threads is driven by a roller gap adjustment servo motor. A first rotating shaft is rotatably mounted on the first sliding support frame, and a left front roller and a right front roller are mounted on the first rotating shaft. A second rotating shaft is rotatably mounted on the second sliding support frame, and a left rear roller and a right rear roller are mounted on the second rotating shaft. An eddy current motor is provided on the first sliding support frame and driven by the first rotating shaft. Both the first and second sliding support frames are provided with electromagnetic brakes for braking the rotating shafts.

4. The safety detection device for the working surface of the new energy chassis dynamometer according to claim 3, characterized in that, A first support rod is provided horizontally forward on the upper part of the first sliding support frame. A first support plate is provided vertically on the first support rod. The top surface of the first support plate is flush with the upper surface of the forward vehicle guide plate. A first transition plate is provided horizontally on the top surface of the first support plate. The first transition plate is placed on the upper surface of the forward vehicle guide plate. The second sliding support frame extends horizontally backward at its upper part and is provided with a second support rod. A second support plate is vertically provided on the second support rod. The top surface of the second support plate is flush with the upper surface of the forward vehicle guide plate. A second transition plate is horizontally provided on the top surface of the second support plate and is placed on the upper surface of the forward vehicle guide plate.

5. The safety detection device for the working surface of the new energy chassis dynamometer according to claim 4, characterized in that, The structure of the second roller group is the same as that of the first roller group.

6. The safety detection device for the working surface of the new energy chassis dynamometer according to claim 3, characterized in that, Lifting mechanisms are provided on the fixed plate and in the middle of the first roller group, and on the sliding plate and in the middle of the second roller group.

7. The safety detection device for the working surface of the new energy chassis dynamometer according to claim 6, characterized in that, The lifting mechanism includes a lifting fixed base, a lifting cylinder is vertically mounted on the lifting fixed base, and fixed sleeves are vertically mounted on both sides of the lifting cylinder on the lifting fixed base. A guide sleeve is slidably inserted into the fixed sleeve, and a support beam is horizontally mounted between the top of the guide sleeve and the top of the piston rod of the lifting cylinder.

8. The safety detection device for the working surface of the new energy chassis dynamometer according to claim 7, characterized in that, The top surface of the supporting beam is a concave arc surface.

Images