An automatic trailer system in dynamic wheel-turning test of new energy vehicles

Abstract

The present invention discloses an automatic towing system in a dynamic hub rotating test of a new energy vehicle, and the present invention relates to the technical field of automatic towing systems, comprising: a towing assembly, rails and a safe house assembly. When an emergency occurs in an environmental chamber, the vehicle can be transported to the safe house assembly for corresponding treatment, thereby reducing vehicle losses and the risk of dangerous accidents. When an emergency occurs in the environmental chamber, the towing assembly lifts the trolley and moves it above a lifting support plate, and at this time, an electric lifting cylinder is started, so that the electric lifting cylinder drives the lifting support plate and the trolley to descend to the interior of a safety house body, and then the upper end of the safety house body is sealed by a sealing cover, thereby achieving the purpose of safely storing the trolley and avoiding accidents.

Description

Technical Field

[0001] The present invention relates to the technical field of automatic towing systems, and in particular to an automatic towing system in a dynamic hub rotating test of a new energy vehicle. Background Art

[0002] New energy vehicles need to undergo dynamic hub-turning tests in an environmental chamber. When an emergency occurs in the chamber, such as short circuit, smoke, fire, etc., danger may easily occur.

[0003] To this end, we provide an automatic towing system in the dynamic hub test of new energy vehicles to solve the above problems. Summary of the invention

[0004] In view of the problems existing in the above-mentioned prior art, the present invention provides an automatic towing system for dynamic hub rotating test of new energy whole vehicle, which solves the problem that new energy needs to conduct dynamic hub rotating test of whole vehicle in an environmental chamber, and when the vehicle encounters an emergency in the environmental chamber, such as short circuit, smoke, fire, etc., dangerous problems may easily occur.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts an automatic towing system in a dynamic hub rotating test of a new energy vehicle, comprising:

[0006] A trolley assembly, the trolley assembly includes a vehicle plate, both sides of the middle part of the vehicle plate are fixedly connected with electric push rods, the telescopic ends of the two electric push rods are opposite, and the telescopic ends of the electric push rods are rotatably connected with a connecting plate through a first rotating shaft, weighing rollers are arranged at both ends of the connecting plate, a mounting seat is arranged at the end of the weighing roller away from the connecting plate, a weighing universal wheel is rotatably connected to the mounting seat, a connecting seat is fixedly arranged at the end of the weighing roller close to the connecting plate, a groove is arranged inside the connecting seat, the bottom of the connecting seat is rotatably connected to the upper surface of the vehicle plate through a second rotating shaft, a sliding groove is arranged at the end of the connecting plate close to the connecting seat, a sliding shaft is fixedly arranged at the end of the connecting seat away from the weighing roller, the sliding shaft is slidably arranged in the sliding groove, and guide steel wheels are arranged at the four corners of the bottom of the trolley assembly;

[0007] Steel rails, the steel rails are used for the rolling of the guide steel wheels to realize the movement of the trolley assembly;

[0008] A safe house component includes a safe house main body, a lift support plate is provided on the top of the safe house main body, an electric lift cylinder is fixedly connected to the bottom of the lift support plate, and the electric lift cylinder is fixedly installed on the bottom surface of the safe house main body; a sealing cover is provided on one side of the safe house main body in an openable and closable manner, and the sealing cover corresponds to the upper end of the safe house main body.

[0009] As a further optimization of the above solution, a support plate is provided in the upper middle part of the vehicle plate, an electric telescopic rod is fixedly connected between the lower surface of the support plate and the upper surface of the vehicle plate, an electromagnet is fixedly connected to the lower surface of the support plate, and a plurality of electromagnets are provided and distributed at equal distances.

[0010] As a further optimization of the above solution, the trolley assembly lifts the tire position at the bottom of the trolley.

[0011] As a further optimization of the above solution, the trolley assembly lifts the battery compartment at the bottom of the trolley, and a second self-locking structure and a first self-locking structure are provided between the battery compartment and the chassis of the trolley assembly.

[0012] As a further optimization of the above solution, two groups of towing assemblies are provided, and the two groups of towing assemblies are respectively lifted at the front and rear wheel positions of the tire position at the bottom of the trolley.

[0013] As a further optimization of the above solution, the rails are laid extending from the inside of the test plant to the outside of the test plant.

[0014] As a further optimization of the above solution, the main body of the safety house is arranged outside the test plant, and the main body of the safety house is buried underground.

[0015] As a further optimization of the above solution, ventilation holes are fixedly provided on the upper surface of the lifting support plate, and a plurality of ventilation holes are provided, and the plurality of ventilation holes are distributed at equal distances.

[0016] As a further optimization of the above solution, when the sealing cover is engaged on the top of the safety house body, the sealing cover and the safety house body are sealed by a mechanical structure.

[0017] As a further optimization of the above solution, a vacuum generator for evacuating the safe house body is provided on one side of the safe house body.

[0018] As a further optimization of the above scheme, a control unit is provided on the upper surface of the vehicle plate, a first channel is provided inside the connecting seat, an annular groove is provided at the inner ring of the weighing roller, a second gear tooth is fixedly provided on the inner wall of the outer ring of the annular groove, an airbag is fixedly provided at the outer ring of the connecting seat, a first gear tooth is fixedly provided at the outer ring of the airbag, a plurality of the first gear teeth and a plurality of the second gear teeth are provided, and the first gear teeth correspond to the second gear teeth, a second channel connecting the first channel and the inside of the airbag is provided on the connecting seat, a connecting hose is provided at the end of the connecting seat away from the weighing roller, one end of the connecting hose is connected to the first channel, and the other end of the connecting hose is connected to the control unit.

[0019] As a further optimization of the above solution, a plurality of annular grooves are provided, and the plurality of annular grooves are distributed at equal distances along the length direction of the weighing roller.

[0020] The automatic trailer system in the dynamic hub rotating test of a new energy vehicle of the present invention has the following beneficial effects:

[0021] 1. The automatic towing system in the dynamic hub test of a new energy vehicle of the present invention can transport the vehicle to the safe house assembly for corresponding treatment when an emergency occurs in the environmental chamber, thereby reducing the risk of vehicle loss and dangerous accidents;

[0022] 2. In the automatic towing system in the dynamic hub test of a new energy vehicle of the present invention, when an emergency occurs in the vehicle in the environmental chamber, the towing assembly lifts the trolley and moves it above the lifting support plate. At this time, the electric lifting cylinder is started, so that the electric lifting cylinder drives the lifting support plate and the trolley to descend to the inside of the safety house body, and then the upper end of the safety house body is sealed by a sealing cover, thereby achieving the purpose of safely storing the trolley and avoiding accidents;

[0023] 3. In the automatic towing system in the dynamic hub turning test of a new energy vehicle of the present invention, the main body of the safety house is buried underground, and the ambient temperature inside the main body of the safety house is relatively low, which is conducive to extinguishing the fire of the car and avoiding explosion. The main body of the safety house adopts an explosion-proof steel plate structure. Even if the car explodes, the power of the explosion can be reduced due to the soil barrier around the main body of the safety house. Only an explosion-proof steel plate structure of a certain strength is needed to ensure the safety of use, and the thickness and strength of the sealing cover only need to be set slightly higher, which greatly saves materials;

[0024] 4. The automatic towing system in the dynamic hub test of a new energy vehicle of the present invention can fit the support plate to the chassis position of the vehicle when the electric telescopic rod is started, thereby increasing the lifting area, reducing the wear between the structures, and extending the service life of the vehicle plate as a whole;

[0025] 5. If smoke or fire is detected only at the battery compartment or the vehicle body, the pallet can be lifted and attached to the bottom of the battery compartment, and the battery compartment can be taken out separately, thereby removing the carrier with the fire source separately, avoiding large losses of the entire vehicle and greatly reducing losses during movement.

[0026] 6. The connecting seat with the airbag provided in the present invention can realize the rapid braking of the vehicle wheels to avoid further danger.

[0027] 7. When using liquid such as coolant to pass into the airbag, the control unit can use a water pump and a coolant tank, etc. The water pump passes the coolant in the coolant tank into the airbag to accelerate the braking of the weighing roller, and the coolant has the function of cooling the first gear teeth, the second gear teeth, the weighing roller, and the connecting seat, thereby avoiding the phenomenon of brake failure caused by excessive temperature.

[0028] 8. Based on the fact that there are multiple annular grooves and multi-point braking, the weighing roller can brake faster and more stably, and it is not easy to cause the weighing roller to tilt when braking from one side, thus reducing the wear between the structures and the occurrence of non-directional inertial force. At the same time, since there are multiple annular grooves in the present invention, it is also ensured that there is a sufficient contact area between the weighing roller and the connecting seat, so that the weighing roller rotates stably.

[0029] With reference to the following description and drawings, a specific embodiment of the present invention is disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the scope of the embodiments of the present invention is not limited thereby, and within the spirit and scope of the appended claims, the embodiments of the present invention include many changes, modifications and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a structural schematic diagram of the automatic trailer system in the dynamic hub rotating test of the new energy vehicle of the present invention;

[0031] Figure 2 This is a structural schematic diagram of a trailer assembly from one perspective in Embodiment 1 of the present invention;

[0032] Figure 3 This is a schematic structural diagram of the trailer assembly in another perspective in Embodiment 1 of the present invention;

[0033] Figure 4 A top view of the weighing roller in the embodiment 1 of the present invention when it is unfolded and used;

[0034] Figure 5 This is a schematic diagram of the structure of a trailer assembly in Example 2 of the present invention;

[0035] Figure 6 It is a cross-sectional view of a trailer assembly in Embodiment 2 of the present invention;

[0036] Figure 7 It is a structural schematic diagram of the embodiment 2 of the present invention in which the support plate is raised and the weighing roller is in a retracted state;

[0037] Figure 8 It is a structural schematic diagram of the embodiment 2 of the present invention in which the support plate is raised and the weighing roller is in an unfolded state;

[0038] Fig. 9It is a structural schematic diagram of the towing assembly of the present invention when used in conjunction with a trolley;

[0039] Fig.10 It is a structural schematic diagram of the towing assembly of the present invention when the battery compartment on the trolley is taken out.

[0040] Fig.11 This is a schematic diagram of the structure of the trailer assembly in Example 3 of the present invention.

[0041] Fig.12 This is a schematic diagram of the structure of the connecting seat and the weighing roller in Example 3 of the present invention.

[0042] Fig.13 For the present invention Fig.12 A schematic diagram of the enlarged structure in the middle.

[0043] In the figure: a trolley assembly 1, a rail 2, a trolley 3, a safety house body 4, a lifting support plate 5, a sealing cover 6, a ventilation hole 7, an electric lifting cylinder 8, a vacuum generator 9, a vehicle plate 10, a lifting ring 11, a first rotating shaft 12, an electric push rod 13, a connecting plate 14, a sliding shaft 15, a second rotating shaft 16, a connecting seat 17, a groove 18, a weighing roller 19, a mounting seat 20, a weighing universal wheel 21, a guide steel wheel 22, a sliding groove 23, a supporting plate 24, an electric telescopic rod 25, an electromagnet 26, a first self-locking structure 27, a battery compartment 28, a second self-locking structure 29, a control unit 30, a first channel 31, a connecting hose 32, a second channel 33, an annular groove 34, an airbag 35, a first gear tooth 36, and a second gear tooth 37. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention.

[0045] It should be noted that when an element is referred to as being "disposed on, provided with" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected, connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. "Fixed connection" means a fixed connection. There are many ways of fixed connection, which are not within the scope of protection of this article. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only and do not represent the only implementation method.

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs. The terms used in the specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0047] In Example 1, please refer to the attached Figure 1-10 The present invention provides a technical solution: an automatic towing system in a dynamic hub test of a new energy vehicle. In order to solve the problem that new energy vehicles need to conduct dynamic hub test of the vehicle in an environmental chamber, when a vehicle encounters an emergency in the environmental chamber, such as a short circuit in the line, smoke, fire, etc., dangerous problems may easily occur. The present invention provides a towing assembly 1, a rail 2 and a safe house assembly. When the rail 2 is laid, it extends from the inside of the test plant to the outside of the test plant. The towing assembly 1 can be lifted on the bottom of the vehicle, so as to achieve the purpose of the vehicle entering and exiting the environmental chamber; the rail 2 can provide direction for the towing assembly 1 when lifting the vehicle to move; when a vehicle encounters an emergency in the environmental chamber, it can be transported to the safe house assembly for corresponding processing, thereby reducing the risk of vehicle loss and dangerous accidents.

[0048] The specific structure of the trolley assembly 1 includes a vehicle plate 10, and electric push rods 13 are fixedly connected to both sides of the middle of the vehicle plate 10. The telescopic ends of the two electric push rods 13 are opposite to each other, and the telescopic ends of the electric push rods 13 are rotatably connected to a connecting plate 14 through a first rotating shaft 12. Both ends of the connecting plate 14 are provided with weighing rollers 19, and a mounting seat 20 is provided at one end of the weighing roller 19 away from the connecting plate 14. A weighing universal wheel 21 is rotatably connected to the mounting seat 20. A connecting seat 17 is fixedly provided at one end of the weighing roller 19 close to the connecting plate 14, and a groove 18 is provided inside the connecting seat 17. The connecting seat 1 The bottom of the trolley assembly 1 is rotatably connected to the upper surface of the vehicle plate 10 through the second rotating shaft 16, a sliding groove 23 is provided at one end of the connecting plate 14 close to the connecting seat 17, and a sliding shaft 15 is fixedly provided at one end of the connecting seat 17 away from the weighing roller 19, and the sliding shaft 15 is slidably set in the sliding groove 23, and guide steel wheels 22 are provided at the four corners of the bottom of the trolley assembly 1; when working, the trolley assembly 1 lifts the tire position at the bottom of the trolley 3, so as to carry out a dynamic hub test of the whole vehicle; wherein, the trolley assembly 1 is provided with two groups, and the two groups of trolley assemblies 1 are respectively lifted at the front and rear wheel positions of the tire position at the bottom of the trolley 3.

[0049] The method of lifting the vehicle by the towing component 1 is as follows:

[0050] In the first step, a traction mechanism is connected to the trolley assembly 1, such as a winch, etc. The winch is not shown in the figure and is a common existing technology, so it is not described here. A lifting ring 11 for connecting a connecting rope or a hook on the winch is fixedly provided on the upper surface of the vehicle plate 10. When the winch is started, the trolley assembly 1 is dragged to move by the connecting rope. At this time, the guide steel wheel 22 at the bottom of the vehicle plate 10 is located in the steel rail 2 and rolls, thereby realizing the movement of the trolley assembly 1.

[0051] The second step is to start the electric push rod 13 on the vehicle plate 10, and the telescopic end of the electric push rod 13 contracts, so that the connecting plate 14 moves toward the position close to the fixed end of the electric push rod 13. At this time, the sliding shaft 15 slides in the sliding groove 23 to drive the connecting seat 17 to rotate. The connecting seat 17 rotates around the second rotating shaft 16 to a state parallel to the length direction of the vehicle plate 10. The weighing rollers 19 on both sides of the vehicle plate 10 remain parallel to each other and enter the bottom of the trolley 3.

[0052] The third step is to move the two trolley assemblies 1 to the front and rear wheel positions at the bottom of the trolley 3 respectively, and then start the electric push rod 13 to extend the telescopic end of the electric push rod 13. At this time, the two connecting plates 14 are close to each other, the sliding shaft 15 slides in the sliding groove 23, and the connecting seat 17 rotates with the second rotating shaft 16 as the axis to a state parallel to the width direction of the vehicle plate 10. The weighing rollers 19 on both sides of the vehicle plate 10 remain in the same straight line state, and the corresponding weighing rollers 19 are respectively blocked at the front and rear sides of the wheel to form a safety protection. At this time, the tire can be supported on the corresponding weighing roller 19, which is convenient for the dynamic hub test of the whole vehicle.

[0053] Power calculation in actual use:

[0054] Considering the characteristics of the trailer system, such as long distance, heavy load, and linear reciprocating motion, it is planned to adopt chain drive, steel wheel, and rail support and guidance to achieve it.

[0055] Vehicle mass: about 2t;

[0056] Estimated mass of trailer system (moving part): about 100kg;

[0057] The rolling friction coefficient between the guide steel wheel 22 and the steel rail 2 is 0.2-0.4, with a maximum value of 0.4;

[0058] Then the maximum rolling friction torque is: 0.4*(2000+100)*9.8=823.2Nm;

[0059] In order to allow the trailer assembly 1 to enter the trolley 3, the diameter of the guide steel wheel 22 should not be too large, and the diameter of the guide steel wheel 22 is 80 mm;

[0060] The drag force is 823.2Nm / 40mm=20580N;

[0061] Dragging speed 1m / s.

[0062] The specific structure of the safe house assembly includes a safe house body 4, a lifting support plate 5 that can be raised and lowered is arranged on the top of the safe house body 4, an electric lifting cylinder 8 is fixedly connected to the bottom of the lifting support plate 5, and the electric lifting cylinder 8 is fixedly installed on the bottom surface of the safe house body 4, and a sealing cover 6 that can be opened and closed is arranged on one side of the safe house body 4, and the sealing cover 6 corresponds to the upper end of the safe house body 4; when an emergency occurs to the vehicle in the environmental chamber, the towing assembly 1 lifts and moves the trolley 3 to the top of the lifting support plate 5, and at this time, the electric lifting cylinder 8 is started, so that the electric lifting cylinder 8 drives the lifting support plate 5 and the trolley 3 to descend to the inside of the safe house body 4, and then the upper end of the safe house body 4 is sealed by the sealing cover 6, thereby achieving the purpose of safely storing the trolley 3 and avoiding accidents.

[0063] When the sealing cover 6 is engaged on the top of the safety house body 4, the sealing cover 6 and the safety house body 4 are sealed by a mechanical structure, such as a sealing ring, to ensure that the atmospheric environment inside the safety house body 4 is completely isolated from the outside, without oxygen supply, and the fire generated on the trolley 3 can be easily and quickly extinguished.

[0064] In order to further increase the fire extinguishing efficiency, a vacuum generator 9 for evacuating the safety house main body 4 is also arranged on one side of the safety house main body 4. When the vacuum generator 9 is started, the safety house main body 4 can be quickly evacuated. In actual use, the vacuum generator 9 with appropriate power is set according to the space size inside the safety house main body 4 to ensure that the safety house main body 4 is evacuated in the shortest time, thereby increasing the fire extinguishing efficiency.

[0065] It should be noted that the safety house body 4 is arranged outside the test plant, and the safety house body 4 is buried underground. The ambient temperature inside the safety house body 4 is relatively low, which is conducive to extinguishing the fire of the trolley 3 and avoiding explosion. The safety house body 4 adopts an explosion-proof steel plate structure. Even if the trolley 3 explodes, the power of the explosion can be reduced due to the soil barrier around the safety house body 4. Only an explosion-proof steel plate structure of a certain strength is needed to ensure safety of use. Only the thickness and strength of the sealing cover 6 need to be set slightly higher, which greatly saves materials.

[0066] Taking environmental protection requirements into consideration, in actual use, a smoke purification system is also provided on the main body 4 of the safe house to process the smoke generated by the trolley 3 to avoid pollution to the environment.

[0067] In Example 2, reference Figure 5-10In order to extend the service life of the vehicle plate 10, a support plate 24 is provided in the upper middle part of the vehicle plate 10, and an electric telescopic rod 25 is fixedly connected between the lower surface of the support plate 24 and the upper surface of the vehicle plate 10; when the electric telescopic rod 25 is started, the support plate 24 can be attached to the chassis position of the trolley 3, thereby increasing the lifting area, reducing the wear between the structures, and extending the overall service life of the vehicle plate 10.

[0068] Furthermore, an electromagnet 26 is fixedly connected to the lower surface of the support plate 24, and a plurality of electromagnets 26 are provided, and the plurality of electromagnets 26 are distributed at equal distances; when the support plate 24 is attached to the chassis of the trolley 3, the electromagnet 26 can be adsorbed and fixed on the steel structure at the bottom of the chassis, thereby increasing stability during the lifting process.

[0069] If smoke or fire is detected only at the battery compartment 28, the pallet 24 can be lifted and attached to the bottom of the battery compartment 28, and the battery compartment 28 can be taken out separately, thereby removing the carrier with the fire source separately, avoiding large losses of the entire vehicle and greatly reducing losses during movement.

[0070] Furthermore, if a fire occurs on the vehicle body, the battery compartment 28 can be taken out separately to prevent the fire from spreading to the battery compartment 28 and causing explosions and other accidents. This has strong safety and correspondingly avoids large losses of the entire vehicle and large losses during movement.

[0071] A second self-locking structure 29 and a first self-locking structure 27 are provided between the battery compartment 28 and the chassis of the trolley assembly 1. The second self-locking structure 29 and the first self-locking structure 27 are common electrically controlled self-locking structures in the prior art and are not described in detail herein. When the battery compartment 28 needs to be lifted and taken out, the first self-locking structure 27 and the second self-locking structure 29 are opened to open the battery compartment 28, thereby separating the battery compartment 28 from the trolley 3, making it easier to transport the battery compartment 28 out separately.

[0072] It should be noted that the rails 2 extend to the upper surface of the lifting support plate 5, and the rails 2 on the upper surface of the lifting support plate 5 and the rails 2 on the ground are connected in a spliced ​​manner, which does not affect the lifting and lowering of the lifting support plate 5. Ventilation holes 7 are also fixedly arranged on the upper surface of the lifting support plate 5. There are multiple ventilation holes 7, and the multiple ventilation holes 7 are equidistantly distributed. The lifting support plate 5 is arranged so that when the lifting support plate 5 is lifted or lowered, the air at the bottom of the lifting support plate 5 is discharged upward from the ventilation holes 7, and the vacuum generator 9 is also connected to the interior of the safety house main body 4 under the lifting support plate 5, which can facilitate the extraction of air inside the safety house main body 4 to achieve the purpose of vacuuming.

[0073] In Example 3, reference Figure 11-13Considering that when the trailer assembly 1 lifts the car to move, the car may still be in a state of wheel rotation, and the car is prone to detach from the trailer assembly 1, a control unit 30 is provided on the upper surface of the vehicle plate 10 in the present invention, a first channel 31 is provided inside the connecting seat 17, an annular groove 34 is provided at the inner ring of the weighing roller 19, and a plurality of annular grooves 34 are provided, and the plurality of annular grooves 34 are distributed at equal distances along the length direction of the weighing roller 19, and a second gear tooth 37 is fixedly provided on the inner wall of the outer ring of the annular groove 34, An airbag 35 is fixedly provided at the outer ring of the connecting seat 17, and a first gear tooth 36 is fixedly provided at the outer ring of the airbag 35. A plurality of first gear teeth 36 and a plurality of second gear teeth 37 are provided, and the first gear teeth 36 correspond to the second gear teeth 37. A second channel 33 connected between the first channel 31 and the inside of the airbag 35 is provided on the connecting seat 17. A connecting hose 32 is provided at one end of the connecting seat 17 away from the weighing roller 19. One end of the connecting hose 32 is connected to the first channel 31, and the other end of the connecting hose 32 is connected to the control unit 30.

[0074] In the present invention, when a car breaks down and the wheels of the car need to be quickly braked, usually due to the failure of the brake system, the car can only wait for the car wheels to automatically run for a period of time before stopping, which makes it easy for the car to break away from the towing assembly 1 and cause danger; therefore, the connecting seat 17 with the airbag 35 provided in the present invention can achieve rapid braking of the car wheels to avoid further danger.

[0075] The specific working principle is: liquid or gas is filled into the connecting hose 32 through the control unit 30, and the liquid or gas enters the interior of the airbag 35 after passing through the connecting hose 32, the first channel 31, and the second channel 33 in sequence, so that the airbag 35 expands. When the airbag 35 expands, the first gear 36 is used to block the second gear 37, thereby increasing the resistance to the rotation of the weighing roller 19, so that the weighing roller 19 gradually stops, and the resistance of the wheel supported between the corresponding two weighing rollers 19 is increased, so that the car wheel is braked faster.

[0076] It should be noted that the control unit 30 is a common power circulation mechanism, and those skilled in the art can select it according to actual needs.

[0077] For example, when gas is introduced into the airbag 35, the control unit 30 may use an air pump.

[0078] When liquid such as coolant is passed into the airbag 35, the control unit 30 can use a water pump and a coolant tank, etc. The water pump passes the coolant in the coolant tank into the airbag 35 to accelerate the braking of the weighing roller 19, and the coolant has the function of cooling the first gear teeth 36, the second gear teeth 37, the weighing roller 19, and the connecting seat 17, thereby avoiding the phenomenon of brake failure caused by excessive temperature.

[0079] And based on the fact that the annular groove 34 is provided with multiple, multi-point brakes, the weighing roller 19 can brake faster and more stably, and it is not easy to cause the weighing roller 19 to tilt when braking from one side, and the inertial force is uneven, thereby reducing the wear between the structures and the occurrence of non-directional inertial force. At the same time, in the present invention, since the annular groove 34 is provided with multiple, it is also ensured that there is a sufficient contact area between the weighing roller 19 and the connecting seat 17, so that the weighing roller 19 rotates stably.

[0080] It is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic trailer system in a dynamic hub test of a new energy vehicle, characterized in that: include: A trolley assembly (1), the trolley assembly (1) comprising a vehicle plate (10), both sides of the middle of the vehicle plate (10) being fixedly connected to electric push rods (13), the telescopic ends of the two electric push rods (13) being opposite to each other, and the telescopic ends of the electric push rods (13) being rotatably connected to a connecting plate (14) via a first rotating shaft (12), both ends of the connecting plate (14) being provided with a weighing roller (19), an end of the weighing roller (19) away from the connecting plate (14) being provided with a mounting seat (20), a weighing universal wheel (21) being rotatably connected to the mounting seat (20), and the weighing roller (19) being close to the connecting plate (14) and the weighing universal wheel (21) being rotatably connected to the mounting seat (20), A connecting seat (17) is fixedly provided at one end near the connecting plate (14), a groove (18) is provided inside the connecting seat (17), the bottom of the connecting seat (17) is rotatably connected to the upper surface of the vehicle plate (10) via a second rotating shaft (16), a sliding groove (23) is provided at one end of the connecting plate (14) near the connecting seat (17), a sliding shaft (15) is fixedly provided at one end of the connecting seat (17) away from the weighing roller (19), the sliding shaft (15) is slidably provided in the sliding groove (23), and guide steel wheels (22) are provided at the four corners of the bottom of the trolley assembly (1); A steel rail (2), wherein the steel rail (2) is used for the guide steel wheel (22) to roll to achieve movement of the trolley assembly (1); A safe house assembly, comprising a safe house body (4), the top of the safe house body (4) being provided with a lift support plate (5) which can be lifted and lowered, the bottom of the lift support plate (5) being fixedly connected with an electric lift cylinder (8), the electric lift cylinder (8) being fixedly mounted on the bottom surface of the safe house body (4), one side of the safe house body (4) being provided with a sealing cover (6) which can be opened and closed, the sealing cover (6) corresponding to the upper end of the safe house body (4); The trolley assembly (1) lifts the tire position at the bottom of the trolley (3), thereby performing a dynamic wheel rotation test on the entire vehicle; the trolley assembly (1) is provided with two groups, and the two groups of trolley assemblies (1) are lifted at the front and rear wheel positions of the tire position at the bottom of the trolley (3), respectively; The method for the vehicle lifting component (1) to lift the vehicle is as follows: In the first step, a traction mechanism is connected to the trolley assembly (1), the traction mechanism uses a winch, and a lifting ring (11) is fixedly provided on the upper surface of the vehicle plate (10) for connecting a connecting rope or a hook on the winch. When the winch is started, the trolley assembly (1) is dragged to move by the connecting rope, and the guide steel wheel (22) at the bottom of the vehicle plate (10) is located in the steel rail (2) and rolls, thereby realizing the movement of the trolley assembly (1); In the second step, the electric push rod (13) on the vehicle plate (10) is started, and the telescopic end of the electric push rod (13) is contracted, so that the connecting plate (14) moves toward a position close to the fixed end of the electric push rod (13). At this time, the sliding shaft (15) slides in the sliding groove (23) to drive the connecting seat (17) to rotate. The connecting seat (17) rotates around the second rotating shaft (16) to a state parallel to the length direction of the vehicle plate (10). The weighing rollers (19) on both sides of the vehicle plate (10) maintain a parallel state and enter the bottom of the trolley (3); In the third step, the two trolley assemblies (1) are respectively moved to the front and rear wheel positions at the bottom of the trolley (3), and then the electric push rod (13) is started to extend the telescopic end of the electric push rod (13). At this time, the two connecting plates (14) are close to each other, the sliding shaft (15) slides in the sliding groove (23), and the connecting seat (17) rotates around the second rotating shaft (16) to a state parallel to the width direction of the vehicle plate (10). The weighing rollers (19) on both sides of the vehicle plate (10) are kept in the same straight line state, and the corresponding weighing rollers (19) are respectively blocked at the front and rear sides of the wheel to form a safety protection. At this time, the tire is supported on the corresponding weighing roller (19), which is convenient for the dynamic hub test of the whole vehicle.

2. The automatic towing system in the dynamic hub test of a new energy vehicle according to claim 1 is characterized by: A support plate (24) is provided in the middle of the upper portion of the vehicle plate (10); an electric telescopic rod (25) is fixedly connected between the lower surface of the support plate (24) and the upper surface of the vehicle plate (10); an electromagnet (26) is fixedly connected to the lower surface of the support plate (24); a plurality of electromagnets (26) are provided, and the plurality of electromagnets (26) are distributed at equal distances.

3. The automatic towing system in the dynamic hub test of a new energy vehicle according to claim 1 is characterized by: The trolley assembly (1) lifts the battery compartment (28) at the bottom of the trolley (3), and a second self-locking structure (29) and a first self-locking structure (27) are provided between the battery compartment (28) and the chassis of the trolley assembly (1).

4. The automatic towing system in the dynamic hub test of a new energy vehicle according to claim 1 is characterized by: When the steel rail (2) is laid, it extends from the inside of the test plant to the outside of the test plant. The safety house body (4) is arranged outside the test plant, and the safety house body (4) is buried underground.

5. The automatic towing system in the dynamic hub test of a new energy vehicle according to claim 1 is characterized by: A ventilation hole (7) is fixedly provided on the upper surface of the lifting support plate (5), and a plurality of the ventilation holes (7) are provided, and the plurality of ventilation holes (7) are distributed at equal distances.

6. The automatic towing system in the dynamic hub test of a new energy vehicle according to claim 1 is characterized by: When the sealing cover (6) is engaged on the top of the safety house body (4), the sealing cover (6) and the safety house body (4) are sealed via a mechanical structure.

7. The automatic towing system in the dynamic hub test of a new energy vehicle according to claim 1 is characterized by: A vacuum generator (9) for evacuating the safe house body (4) is provided on one side of the safe house body (4).

8. The automatic towing system in the dynamic hub test of a new energy vehicle according to claim 1 is characterized by: A control unit (30) is provided on the upper surface of the vehicle plate (10); a first channel (31) is provided inside the connecting seat (17); an annular groove (34) is provided at the inner ring of the weighing roller (19); a second gear tooth (37) is fixedly provided on the inner wall of the outer ring of the annular groove (34); an air bag (35) is fixedly provided at the outer ring of the connecting seat (17); a first gear tooth (36) is fixedly provided at the outer ring of the air bag (35); a plurality of the first gear teeth (36) and the second gear teeth (37) are provided, and the first gear teeth (36) correspond to the second gear teeth (37); a second channel (33) is provided on the connecting seat (17) and is connected between the first channel (31) and the inside of the air bag (35); a connecting hose (32) is provided at one end of the connecting seat (17) away from the weighing roller (19); one end of the connecting hose (32) is connected to the first channel (31); and the other end of the connecting hose (32) is connected to the control unit (30).

9. The automatic towing system in the dynamic hub test of a new energy vehicle according to claim 8 is characterized by: A plurality of the annular grooves (34) are provided, and the plurality of annular grooves (34) are distributed at equal distances along the length direction of the weighing roller (19).

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