Multifunctional road crack repairing integrated equipment

Abstract

The invention discloses multifunctional road crack repairing integrated equipment, which comprises a self-propelled consignment vehicle, an electric filling mechanism, a storage battery pack and an electric control system, and is characterized in that the self-propelled consignment vehicle can automatically walk along a linear path and is provided with the electric filling mechanism, the storage battery pack and the electric control system; and the electric filling mechanism comprises an electric suction assembly and a second supporting seat, the second supporting seat is fixed to the self-propelled consignment vehicle, a second sliding block is connected to the second supporting seat in a front-back sliding mode, and a second servo motor is fixed to the front end of the second supporting seat. According to the device, data of a crack part are collected, the specific position of the crack on a pavement can be determined, then a second servo motor can be reversely controlled to rotate properly through calculation and judgment, namely, a filling pipe moves to the position over the crack, then an electric suction assembly is controlled to suck repairing liquid (such as asphalt), and the repairing effect is achieved. The asphalt can be discharged from the filling pipe to be filled into the crack, and compared with manual filling.

Description

Technical Field

[0001] This invention relates to the field of road maintenance technology, and in particular to a multifunctional integrated road crack repair device. Background Technology

[0002] Road surfaces develop cracks due to various issues (such as quality problems and overloading). The shape of these cracks varies depending on their cause and can generally be categorized into regular and irregular types. Regardless of type, cracks are generally strip-shaped. If not repaired promptly, cracks may widen, negatively impacting traffic flow. To address this, asphalt crack sealing machines have emerged. However, existing machines are ill-suited for irregular cracks. Repairing irregular cracks still requires manual control of the sealing position, which, limited by the precision and stability of manual control, often results in poor sealing quality and effectiveness. Furthermore, existing machines offer little protection for the working environment; the odor from asphalt is often directly emitted, negatively impacting the health and sensory experience of workers, highlighting the shortcomings of current technology. Summary of the Invention

[0003] The purpose of this invention is to provide a multifunctional integrated road crack repair device to solve the technical problems of low automation, poor crack filling quality and effect, and significant odor interference and impact in existing technologies.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A multifunctional integrated road crack repair device includes a self-propelled transport vehicle, an electric injection mechanism, a battery pack, and an electronic control system. The self-propelled transport vehicle can automatically travel along a straight path and is equipped with the electric injection mechanism, battery pack, and electronic control system. The electric injection mechanism includes an electric suction assembly and a second support base. The second support base is fixed to the self-propelled transport vehicle. A second slider is slidably connected to the second support base, and a second servo motor is fixed to its front end. A second distance sensor is fixed to the rear of the second support base, and a second lead screw is rotatably connected to it in the front-back direction. The second lead screw is coaxially fixed to the second servo motor and threadedly connected to the second slider. The second distance sensor can measure the front-back distance of the rear end of the second slider. An injection pipe is fixed to the bottom of the second slider, and the injection pipe is connected to the discharge port of the electric suction assembly. The outlet is connected via a high-temperature resistant hose. A No. 4 support base is fixed to the right side of the self-propelled transport vehicle. A No. 4 slider is slidably connected to the No. 4 support base, and a No. 4 servo motor is fixed to the front end. A No. 4 lead screw is rotatably connected to the No. 4 support base in the front-back direction, and a No. 4 distance sensor is fixed to the rear end. The No. 4 distance sensor can measure the distance to the rear end of the No. 4 slider. The No. 4 lead screw is coaxially fixed with the shaft of the No. 4 servo motor and is threadedly connected to the No. 4 slider. Multiple vertically downward laser distance sensors are fixed sequentially from front to back at the bottom end of the No. 4 slider. The electric filling mechanism, battery pack, electronic control system, No. 2 servo motor, No. 2 distance sensor, No. 4 servo motor, No. 4 distance sensor, and laser distance sensor are electrically connected. The electronic control system is a known existing technology, such as a microcontroller and an industrial control computer.

[0006] Based on the above technical solution, the electric suction assembly includes a mixing tank, a first support frame, a first geared motor, a stirring paddle, an electric heating device, an aluminum alloy gear pump, and an electric valve. The self-propelled transport vehicle is fixed with a vertical mixing tank, and a vertical first support frame is fixed at the top. A vertical first geared motor is fixed at the top of the first support frame. The stirring paddle is coaxially fixed to the shaft of the first geared motor and is located inside the mixing tank. The self-propelled transport vehicle is also fixed with an electric heating device surrounding the mixing tank. The self-propelled transport vehicle is also fixed with an aluminum alloy gear pump and an electric valve. Both the aluminum alloy gear pump and the electric valve are located below the mixing tank. The suction port of the aluminum alloy gear pump is connected to the bottom of the mixing tank. The discharge port of the aluminum alloy gear pump is connected to one port of the electric valve. The other port of the electric valve is connected to the injection pipe through a high-temperature resistant hose. The first geared motor, the electric heating device, the aluminum alloy gear pump, the electric valve, and the electric control system are electrically connected.

[0007] Based on the above technical solution, the bottom of the self-propelled transport vehicle is fixed with a vertical No. 3 support frame, and the bottom of the No. 3 support frame is fixed with a No. 1 fan. The air outlet of the No. 1 fan faces downward. The No. 1 fan is connected to the electronic control system and is located to the left of the No. 2 support base.

[0008] Based on the above technical solution, the air inlet of the No. 1 fan is fixedly connected to the No. 1 air inlet pipe, and the self-propelled transport vehicle is also fixed with an electric refrigeration device. The electric refrigeration device is electrically connected to the electric control system, and the No. 1 air inlet pipe exchanges heat through the refrigeration end of the electric refrigeration device.

[0009] Based on the above technical solution, two vertical electric push rods are fixed to the top of the first support frame. The two electric push rods are jointly fixed with a flow guide. An air inlet is penetrating through the middle of the flow guide. The air inlet is intermittently connected to the stirring paddle. The part of the flow guide near the outer circumference and the air inlet is lower and the rest is higher. A suction pipe is fixed to the top. The suction pipe runs through the top and bottom and can be connected to the first air inlet pipe through an external hose. The electric push rod is electrically connected to the electronic control system. After passing through the cooling end of the electric cooling device, the first suction pipe also passes through an air filter. The air filter includes a housing, an air filter element, and inlet and outlet ports. The self-propelled transport vehicle is fixed with a bracket. The bracket holds a horizontal housing. The housing is encapsulated with a dry air filter element and is fixedly connected to two inlet and outlet ports. The two inlet and outlet ports are respectively connected to the first air inlet pipe. The flow guide can enter the stirring tank so that the outer edge fully contacts the inner wall of the stirring tank.

[0010] Based on the above technical solution, the self-propelled transport vehicle has a No. 3 support base fixed at its bottom. A No. 3 slider is slidably connected to the No. 3 support base, and a No. 3 lead screw is rotatably connected to it in the horizontal direction. A No. 3 servo motor is fixed to the front end of the No. 3 support base, and a No. 3 distance sensor is fixed to its rear end. The shaft of the No. 3 servo motor is coaxially fixed with the No. 3 lead screw. The No. 3 lead screw is threadedly connected to the No. 3 slider. The No. 3 distance sensor can measure the front-to-back distance of the rear end of the No. 3 slider. A vertical No. 5 servo motor and a No. 1 support cylinder are fixed to the bottom end of the No. 3 slider. The shaft of the No. 5 servo motor is coaxially fixed with… A rotating base is rotatably connected to a first support cylinder. A vertical frame is fixed to the bottom left of the rotating base, and a soft interception net is fixedly enclosed within the frame. A storage tank is fixed along the edge of the lower right side of the frame. An air jet pipe inclined to the lower left is fixed to the right side of the rotating base. A second fan is fixed to the right side of the self-propelled transport vehicle. The air inlet of the second fan faces right, and the air outlet of the second fan is fixedly connected to a first air outlet pipe. The first air outlet pipe can be fixedly connected to the upper part of the air jet pipe through an external hose. The third servo motor, the third ranging sensor, the fifth servo motor, the second fan, and the electrical control system are electrically connected.

[0011] Based on the above technical solution, the electric cooling device adopts semiconductor cooling. The heating end of the electric cooling device is on top and the cooling end is on the bottom. The No. 1 air outlet pipe passes through the heating end of the electric cooling device and is fixedly connected to the upper part of the jet pipe through an external hose. The self-propelled transport vehicle has a No. 1 support seat fixed at the left front and left rear. The two No. 1 support seats are respectively slidably connected to two No. 1 sliders, and are respectively rotatably connected to bidirectional lead screws in the left and right directions. The left part of the two No. 1 support seats is fixed with a No. 1 servo motor. The rotating shafts of the two No. 1 servo motors are respectively fixed to the same axis as the two bidirectional lead screws. The two No. 1 sliders slidably connected to the same No. 1 support seat form a group. The two groups of No. 1 sliders are respectively fixed with a traction belt. The middle part of the two traction belts is respectively fixed with a vertical electric vibratory compactor. The No. 1 servo motor and the electric vibratory compactor are electrically connected to the electric control system.

[0012] Based on the above technical solution, a guide plate is fixed at the bottom of the guide shroud, and the guide plate and the guide shroud form a frustoconical flow channel. The suction pipe is connected to the flow channel. There are two suction pipes, and each is fixedly connected to a No. 1 electric three-way valve. The No. 1 outlet pipe is fixedly connected to a No. 2 electric three-way valve after passing through the heating end of the electric cooling device. The other port of the No. 2 electric three-way valve is fixedly connected to a No. 2 outlet pipe. The other two ports of the No. 1 electric three-way valve are respectively connected to the No. 2 outlet pipe and the No. 1 inlet pipe through flexible hoses. The No. 1 electric three-way valve and the No. 2 electric three-way valve are electrically connected to the electric control system.

[0013] Based on the above technical solution, the self-propelled transport vehicle includes a vehicle body, a second support frame, a second support shaft, an auxiliary roller, a second electric push rod, a fifth distance sensor, a handle, a fourth support frame, a third support shaft, a main roller, and a second reduction motor. The second support frame is rotatably connected to the left side of the vehicle body. The virtual rotation axis of the second support frame is vertically arranged. The second support shaft is fixed at the bottom of the second support frame along the front-rear direction. The auxiliary roller is coaxially rotatably connected to the middle of the second support shaft. The second electric push rod and the fifth distance sensor are fixed to the left front and left rear of the vehicle body respectively along the left-right direction. The two second electric push rods are respectively positioned opposite the right end of the second support frame. The front and rear parts make contact by pushing. The two No. 5 distance measuring sensors measure the left and right distances of the front and rear parts of the right end of the No. 2 support frame. A handle is fixed to the left end of the vehicle body. Two No. 4 support frames are fixed to the bottom right end of the vehicle body. The two No. 4 support frames are connected to the No. 3 support shaft by rotating together in the front and rear direction. The No. 3 support shaft has main rollers fixed coaxially at both ends of the front and rear ends. The No. 2 reduction motor is fixed to the bottom right end of the vehicle body. The shaft of the No. 2 reduction motor is parallel to the No. 2 support shaft and is connected to the No. 2 support shaft by gear meshing. The No. 2 electric push rod, the No. 5 distance measuring sensor, the No. 2 reduction motor and the electronic control system are electrically connected.

[0014] Based on the above technical solution, each of the two bottom ends of the second support frame is fixed with a vertical third electric push rod, and each of the two ends is slidably connected to a sliding seat. The push rods of the two third electric push rods are respectively fixed to the sliding seats. The two sliding seats are respectively fixed with second support cylinders along the front-back direction. When the sliding seats move up and down to a certain position, the second support cylinders are made coaxial with the second support shaft. The two second support cylinders are respectively rotatably connected to guide rings, and the two guide rings are respectively slidably connected to rollers. The adjacent ends of the two rollers are respectively fixed with support plates. The two support plates are fixed with permanent magnets at their opposite ends. Electromagnets are coaxially fixed to the inner walls of the two second support cylinders. The electromagnets and permanent magnets are aligned front to back. The outer circumference of the two support plates is conical and can be in contact with the front and rear parts of the auxiliary roller of the second support shaft to form a rolling roller. Vertical sixth distance sensors are fixed to the front and rear parts of the second support frame. The two sixth distance sensors are used to measure the distance to the top of the two sliding seats. The third electric push rod, electromagnets and sixth distance sensors are electrically connected to the electronic control system.

[0015] Compared with the prior art, the present invention has the following advantages: The present invention realizes the acquisition of partial data of the crack, that is, the specific location of the crack on the road surface can be determined. Then, through calculation and judgment, the No. 2 servo motor can be controlled to rotate appropriately, so that the injection pipe is moved directly above the crack. Then, the electric suction component is controlled to suck up the repair fluid (such as asphalt), so that the asphalt can be discharged from the injection pipe and injected into the crack. Compared with manual injection, it can automatically perform injection according to the direction of the crack, improve the degree of automation, greatly reduce the probability of injection onto the road surface, reduce the labor intensity of workers, and improve the quality and effect of injection.

[0016] By using a No. 1 fan, an electric refrigeration unit, an air filter, and a deflector, cold air can be blown onto the poured asphalt, which can quickly cool and harden the poured asphalt, reducing interference and impact on the working environment. At the same time, it can also filter the fumes generated by the asphalt, further reducing interference and impact on the working environment.

[0017] The No. 2 blower and jet pipe can effectively clean the two sides of the crack, improving the cleaning effect and blowing out mud, sand and other debris from the crack. This improves the effect and quality of subsequent asphalt grouting. In conjunction with the heating end of the electric cooling device, the crack can be dried to reduce the moisture content, making it easier for the crack and asphalt to bond, thereby improving the quality and effect of crack repair. The electric vibratory compactor can vibrate the road surface, which can be further transmitted to the asphalt in the crack, making the asphalt more compact and improving the quality and effect of crack repair.

[0018] The No. 1 electric three-way valve, the No. 2 electric three-way valve, the guide plate, and the flow channel enable hot air to blow against the inner wall of the mixing tank, which facilitates the downward flow and even removal of the asphalt adhering to the inner wall of the mixing tank. Then, in conjunction with the downward movement of the guide shroud to scrape the inner wall of the mixing tank, the effect of cleaning the inner wall of the mixing tank is achieved, thereby improving the degree of automation. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the isometric structure of the present invention.

[0020] Figure 2 This is a schematic diagram of the bottom structure of the present invention.

[0021] Figure 3 This is a partially enlarged structural diagram of point A in the present invention.

[0022] Figure 4 This is a schematic diagram of air circulation according to the present invention.

[0023] Figure 5 This is a partial cross-sectional view of the present invention.

[0024] Figure 6 This is a schematic diagram showing the cooperation between the auxiliary roller and the drum of the present invention.

[0025] Figure 7 This is a schematic diagram showing the interaction between the electric refrigeration device of the present invention and the No. 1 outlet pipe and the No. 1 inlet pipe.

[0026] Figure 8 This is a partially enlarged structural diagram of point B in the present invention.

[0027] In the diagram: 1. Self-propelled transport vehicle; 3. Battery pack; 4. Electronic control system; 6. Support base No. 2; 7. Slider No. 2; 8. Servo motor No. 2; 9. Distance sensor No. 2; 10. Lead screw No. 2; 11. Injection pipe; 12. Support base No. 4; 13. Slider No. 4; 14. Servo motor No. 4; 15. Lead screw No. 4; 16. Distance sensor No. 4; 17. Laser distance sensor; 18. Mixing tank; 19. Support frame No. 1; 20. Gear motor No. 1; 21. Agitator; 22. Electric... Heating device, 23. Aluminum alloy gear pump, 24. Electric valve, 25. Support frame No. 3, 26. Fan No. 1, 27. Inlet pipe No. 1, 28. Electric push rod No. 1, 29. Flow guide, 30. Air inlet, 31. Suction pipe, 32. Air filter, 33. Housing, 34. Air filter element, 35. Inlet / outlet port, 36. Bracket, 37. Support base No. 3, 38. Slider No. 3, 39. Lead screw No. 3, 40. Servo motor No. 3, 41. Distance sensor No. 3, 42. No. 5 43. Servo motor, 44. Support cylinder No. 1, 45. Rotary seat, 46. Frame, 47. Interception net, 48. Storage tank, 49. Jet pipe, 50. Fan No. 2, 51. Air outlet pipe No. 1, 52. Support base No. 1, 53. Slider No. 1, 54. Two-way lead screw, 55. Servo motor No. 1, 56. Traction belt, 57. Electric vibratory compactor, 58. Guide plate, 59. Flow channel, 60. Electric three-way valve No. 1, 61. Electric three-way valve No. 2, 62. Air outlet pipe No. 2, 63. Vehicle body 63. Support frame No. 2; 64. Support shaft No. 2; 65. Auxiliary roller; 66. Electric push rod No. 2; 67. Distance sensor No. 5; 68. Handle; 69. Support frame No. 4; 70. Support shaft No. 3; 71. Main roller; 72. Gear motor No. 2; 73. Electric push rod No. 3; 74. Sliding seat; 75. Support cylinder No. 2; 76. Guide ring; 77. Roller; 78. Support plate; 79. Permanent magnet; 80. Electromagnet; 82. Distance sensor No. 6; 83. Electric cooling device. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0029] like Figures 1-8As shown, a multifunctional integrated road crack repair device includes a self-propelled transport vehicle 1, an electric injection mechanism, a battery pack 3, and an electronic control system 4. The self-propelled transport vehicle 1 can automatically travel along a straight path and is equipped with the electric injection mechanism, battery pack 3, and electronic control system 4. The electric injection mechanism includes an electric suction component and a second support base 6. The second support base 6 is fixed to the self-propelled transport vehicle 1. A second slider 7 is slidably connected to the second support base 6, and a second servo motor 8 is fixed to its front end. A second distance sensor 9 is fixed to the rear of the second support base 6, and a second lead screw 10 is rotatably connected to it in the front-back direction. The second lead screw 10 is coaxially fixed with the second servo motor 8 and threadedly connected to the second slider 7. The second distance sensor 9 can measure the front-back distance of the rear end of the second slider 7. An injection pipe 11 is fixed to the bottom of the second slider 7. The injection pipe 11 is connected to the discharge end of the electric suction component via a heat-resistant... A high-temperature hose is connected to the self-propelled transport vehicle 1. A fourth support base 12 is fixed to the right side of the vehicle. A fourth slider 13 is slidably connected to the fourth support base 12. A fourth servo motor 14 is fixed to the front end of the fourth support base 12. A fourth lead screw 15 is rotatably connected to the fourth support base 12 in the front-back direction. A fourth distance sensor 16 is fixed to the rear end of the fourth slider 13. The fourth lead screw 15 is coaxially fixed with the shaft of the fourth servo motor 14 and is threadedly connected to the fourth slider 13. Multiple vertically downward laser distance sensors 17 are fixed sequentially from front to back at the bottom end of the fourth slider 13. The electric filling mechanism, battery pack 3, electronic control system 4, second servo motor 8, second distance sensor 9, fourth servo motor 14, fourth distance sensor 16 and laser distance sensor 17 are electrically connected. The electronic control system 4 is a known existing technology, such as a microcontroller and an industrial control computer.

[0030] In use, the device is moved to the repair site, and then the self-propelled transport vehicle 1 moves at a low and constant speed in a straight line (assuming it moves from left to right), so that its travel path covers the crack as much as possible. During the movement, the electronic control system 4 controls the fourth servo motor 14 to rotate in a uniform and regular forward and reverse direction, so that the fourth slider 13 slides back and forth along the fourth support base 12. During this time, the laser range sensor 17 works continuously, so that it can "scan" downwards to determine the vertical distance between the object and the object below, thereby determining the front and back position and depth of the crack. Then, in conjunction with the fourth range sensor 16, the width and position of the crack in the front and back direction can be determined. Because the self-propelled transport vehicle 1 moves at a low and constant speed in a straight line, it can cover the crack as much as possible when passing through. By performing calculations, the location of the crack in the left-right direction can be deduced, thus achieving the acquisition of partial data on the crack and determining its specific location on the road surface. As the self-propelled transport vehicle 1 moves, the calculation determines when the second slider 7 moves above the crack. Based on the acquired crack data and the distance measurement of the second slider 7 by the second distance sensor 9, the second servo motor 8 can be controlled to rotate appropriately, so that the injection pipe 11 moves directly above the crack. Then, the electric suction component is controlled to suck up the repair fluid (such as asphalt), allowing the asphalt to be discharged from the injection pipe 11 and injected into the crack. Compared with manual injection, it can automatically perform injection according to the direction of the crack, greatly reducing the probability of injection onto the road surface, reducing the labor intensity of workers, and improving the quality and effect of injection.

[0031] The electric suction assembly includes a mixing tank 18, a primary support frame 19, a primary geared motor 20, a stirring paddle 21, an electric heating device 22, an aluminum alloy gear pump 23, and an electric valve 24. The self-propelled transport vehicle 1 is fixed with a vertical mixing tank 18, and a vertical primary support frame 19 is fixed to its top. A vertical primary geared motor 20 is fixed to the top of the primary support frame 19. The stirring paddle 21 is coaxially fixed to the shaft of the primary geared motor 20 and is located within the mixing tank 18. The self-propelled transport vehicle 1 is also fixed with an electric heating device 22, which surrounds the mixing tank 18. Around the mixing tank 18, the self-propelled transport vehicle 1 is also fixed with an aluminum alloy gear pump 23 and an electric valve 24. The aluminum alloy gear pump 23 and the electric valve 24 are both located below the mixing tank 18. The suction port of the aluminum alloy gear pump 23 is connected to the bottom of the mixing tank 18. The discharge port of the aluminum alloy gear pump 23 is connected to one port of the electric valve 24. The other port of the electric valve 24 is connected to the injection pipe 11 through a high-temperature resistant hose. The first gear motor 20, the electric heating device 22, the aluminum alloy gear pump 23, the electric valve 24 and the electrical control system 4 are electrically connected.

[0032] Furthermore, before the self-propelled transport vehicle 1 moves, asphalt is poured into the mixing tank 18. The electric heating device 22 heats the mixing tank 18 to a suitable temperature, so that the asphalt can be softened by heating to a suitable temperature before pouring (such as 120℃ to 200℃). During this process, the first geared motor 20 is controlled to rotate, and the mixing paddle 21 can stir the asphalt in the mixing tank 18, thereby improving its softening effect and rate. When pouring, the aluminum alloy gear pump 23 is controlled to work, and then the electric valve 24 is opened. When stopping pouring, the aluminum alloy gear pump 23 and the electric valve 24 are closed at the same time.

[0033] The self-propelled transport vehicle 1 has a vertical No. 3 support frame 25 fixed at its bottom. A No. 1 fan 26 is fixed at the bottom of the No. 3 support frame 25. The air outlet of the No. 1 fan 26 faces downward. The No. 1 fan 26 is connected to the electronic control system 4 and is located to the left of the No. 2 support seat 6.

[0034] During the movement of the self-propelled transport vehicle 1, the No. 1 fan 26 is controlled to blow air downwards, thereby enabling the injected asphalt to harden quickly, shortening the duration of traffic disruption, and also achieving the purpose of dissipating odors, reducing interference and impact on the working environment.

[0035] The air inlet of the No. 1 fan 26 is fixedly connected to the No. 1 air inlet pipe 27. The self-propelled transport vehicle 1 is also fixedly equipped with an electric refrigeration device 83. The electric refrigeration device 83 is electrically connected to the electric control system 4. The No. 1 air inlet pipe 27 exchanges heat through the refrigeration end of the electric refrigeration device 83.

[0036] Furthermore, when the No. 1 fan 26 uses the No. 1 air intake pipe 27 to draw air, it is cooled by the electric cooling device 83. After blowing, it can quickly cool and harden the injected asphalt, thereby shortening the duration of traffic disruption. The hardened (cooled) asphalt has less odor than the hot asphalt, which can also reduce interference and impact on the working environment.

[0037] Two vertical electric push rods 28 are fixed to the top of the first support frame 19. Both electric push rods 28 are jointly fixed to a flow guide shroud 29. An air inlet 30 passes through the center of the flow guide shroud 29 and is intermittently connected to the stirring paddle 21. The portion of the flow guide shroud 29 near the outer circumference and the air inlet 30 is lower than the rest, and a suction pipe 31 is fixed to its top. The suction pipe 31 extends vertically and can be connected to the first air inlet pipe 27 via an external flexible hose. The electric push rods 28 are electrically connected to the four-phase electrical control system. The first suction... After passing through the cooling end of the electric cooling device 83, pipe 31 also passes through an air filter 32. The air filter 32 includes a housing 33, an air filter element 34, and inlet / outlet ports 35. The self-propelled transport vehicle 1 is fixed with a bracket 36, on which a horizontal housing 33 is placed. The housing 33 contains a dry air filter element 34 and is fixedly connected to two inlet / outlet ports 35. The two inlet / outlet ports 35 are respectively connected to the first air intake pipe 27. The guide shroud 29 can enter the mixing tank 18 so that its outer edge is fully in contact with the inner wall of the mixing tank 18.

[0038] Furthermore, by controlling the extension and retraction of the first electric push rod 28, the guide shroud 29 can move up and down. When filling asphalt into the mixing tank 18, the guide shroud 29 is controlled to move upward; when grouting asphalt, the guide shroud 29 is controlled to move downward and enter the mixing tank 18. When the first blower 26 is working, it can draw air from below the guide shroud 29 through the first air inlet pipe 27 and the suction pipe 31, thereby allowing outside air to enter the guide shroud 29 through the air inlet 30 and then mix with the asphalt in the mixing tank 18. The odors and smoke generated by the odor are drawn in by the No. 1 air intake pipe 27 and the suction pipe 31. After cooling, they enter the air filter 32, are filtered by the air filter element 34, and are then discharged from the No. 1 fan 26. When the odors are cooled and filtered by the air filter element 34, the water molecules inside the filter condense due to the cold, making it easier for the mixed smoke and dust to adhere to them. This makes it easier for the air filter element 34 to intercept the odors, thereby improving the purification effect of the air discharged by the No. 1 fan 26 and reducing the interference and impact of odors on the working environment.

[0039] The self-propelled transport vehicle 1 has a No. 3 support base 37 fixed at its bottom. A No. 3 slider 38 is slidably connected to the No. 3 support base 37, and a No. 3 lead screw 39 is rotatably connected to it in the horizontal direction. A No. 3 servo motor 40 is fixed to the front end of the No. 3 support base 37, and a No. 3 distance sensor 41 is fixed to its rear end. The shaft of the No. 3 servo motor 40 is coaxially fixed with the No. 3 lead screw 39. The No. 3 lead screw 39 is threadedly connected to the No. 3 slider 38. The No. 3 distance sensor 41 can measure the front-to-back distance of the rear end of the No. 3 slider 38. A vertical No. 5 servo motor 42 and a No. 1 support cylinder 43 are fixed to the bottom end of the No. 3 slider 38. A rotating seat 44 is coaxially fixed to the shaft of the No. 5 servo motor 42. The base 44 is rotatably connected to the first support cylinder 43. A vertical frame 45 is fixed to the bottom left of the rotating base 44. A soft intercepting net 46 is fixedly enclosed in the frame 45. A storage tank 47 is fixed along the edge of the lower right part of the frame 45. An air jet pipe 48 inclined to the lower left is fixed to the right part of the rotating base 44. A second fan 49 is fixed to the right part of the self-propelled transport vehicle 1. The air inlet of the second fan 49 faces to the right. The air outlet of the second fan 49 is fixedly connected to the first air outlet pipe 50. The first air outlet pipe 50 can be fixedly connected to the upper part of the air jet pipe 48 through an external hose. The third servo motor 40, the third distance sensor 41, the fifth servo motor 42, the second fan 49 are electrically connected to the electronic control system 4.

[0040] Furthermore, after acquiring the crack data, the No. 3 servo motor 40 is controlled to rotate accordingly. Using the No. 3 lead screw 39 and the No. 3 slider 38, the jet pipe 48 can be moved above the crack. Then, by controlling the No. 5 servo motor 42 to rotate back and forth (the amplitude should not exceed 90 degrees), the rotating seat 44 can be driven to rotate back and forth, which can make the jet pipe 48 swing back and forth. During this period, the No. 2 fan 49 keeps rotating, which can input air into the No. 1 air outlet pipe 50, and then spray it out through the jet pipe 48 to clean the crack. Its back and forth swing can effectively clean the two sides of the crack, improve the cleaning effect, and blow out the mud and sand and other debris in the crack, thereby improving the effect and quality of subsequent asphalt grouting. The mud and sand generated by cleaning are intercepted by the interception net 46 after being discharged from the crack, and finally fall into the storage tank 47, reducing the amount scattered and reducing the interference and impact on the asphalt grouting area.

[0041] The electric cooling device 83 uses semiconductor cooling, with the heating end of the electric cooling device 83 at the top and the cooling end at the bottom. The first air outlet pipe 50 passes through the heating end of the electric cooling device 83 and is fixedly connected to the upper part of the jet pipe 48 through an external hose. The self-propelled transport vehicle 1 has a support seat 51 fixed at the left front and left rear. The two support seats 51 are slidably connected to two sliders 52, and are rotatably connected to bidirectional lead screws 53 in the left and right directions, respectively. The left part of the two support seats 51 is fixed to a servo motor 54. The rotating shafts of the two servo motors 54 are coaxially fixed to the two bidirectional lead screws 53. The two sliders 52 slidably connected to the same support seat 51 form a group. The two groups of sliders 52 are respectively fixed to a traction belt 55. The middle part of the two traction belts 55 is fixed to a vertical electric vibratory compactor 56. The servo motors 54 and the electric vibratory compactors 56 are electrically connected to the electronic control system 4.

[0042] Furthermore, during the process of moving and injecting asphalt while the self-propelled transport vehicle 1 is in motion, by controlling the first servo motor 54 to rotate forward and using the bidirectional lead screw 53, the two first sliders 52 in a set can be brought closer to each other, thereby causing the electric vibratory compactor 56 to descend and contact the road surface. Then, the electric vibratory compactor 56 is controlled to work, which can vibrate the road surface, thereby further transmitting the vibration to the asphalt in the crack, making the asphalt more compact and improving the repair quality and effect of the crack. If it is not injecting asphalt, controlling the first servo motor 54 to rotate in reverse will cause the electric vibratory compactor 56 to move upward and detach from the road surface. After passing through the heating end of the electric cooling device 83, the air discharged from the first jet pipe 48 has a high temperature. When cleaning the crack, it can dry the crack, reduce the moisture content, and facilitate the bonding between the crack and the asphalt, thereby improving the repair quality and effect of the crack.

[0043] A guide plate 57 is fixed to the bottom of the guide shroud 29. The guide plate 57 and the guide shroud 29 form a frustoconical flow channel 58. The suction pipe 31 is connected to the flow channel 58. There are two suction pipes 31, and they are fixedly connected to a first electric three-way valve 59. The first exhaust pipe 50 is fixedly connected to a second electric three-way valve 60 after passing through the heating end of the electric cooling device 83. The other port of the second electric three-way valve 60 is fixedly connected to a second exhaust pipe 61. The other two ports of the first electric three-way valve 59 are connected to the second exhaust pipe 61 and the first intake pipe 27 respectively through flexible hoses. The first electric three-way valve 59 and the second electric three-way valve 60 are electrically connected to the four-phase electric control system.

[0044] Furthermore, during the filling process, a portion of the air enters the mixing tank 18 through the air inlet 30, and then is discharged as cold air through the flow channel 58, the first electric three-way valve 59, the first air inlet pipe 27, the cooling end of the electric refrigeration device 83, the air filter 32, and the first fan 26. The remaining air is discharged as hot air through the second fan 49, the first air outlet pipe 50, the heating end of the electric refrigeration device 83, the second electric three-way valve 60, and the jet pipe 48. After filling is completed, the first fan 26 is turned off, and the second electric three-way valve 60 and the first electric three-way valve are adjusted. At valve 59, air enters the flow channel 58 via fan 49, outlet pipe 50, heating end of electric cooling device 83, electric three-way valve 60, outlet pipe 61, electric three-way valve 59, and suction pipe 31. Then, guided by guide plate 57 and guide hood 29, air blows onto the inner wall of mixing tank 18, facilitating the downward flow and even removal of asphalt adhering to the inner wall of mixing tank 18. Combined with the downward movement of guide hood 29, the inner wall of mixing tank 18 is scraped, thereby achieving the effect of cleaning the inner wall of mixing tank 18 and improving the degree of automation.

[0045] The self-propelled transport vehicle 1 includes a body 62, a second support frame 63, a second support shaft 64, an auxiliary roller 65, a second electric push rod 66, a fifth distance sensor 67, a handle 68, a fourth support frame 69, a third support shaft 70, a main roller 71, and a second reduction motor 72. The second support frame 63 is rotatably connected to the left side of the body 62. The virtual rotation axis of the second support frame 63 is vertically arranged. The second support shaft 64 is fixed to the bottom of the second support frame 63 along the front-rear direction. The auxiliary roller 65 is coaxially rotatably connected to the middle of the second support shaft 64. The second electric push rod 66 and the fifth distance sensor 67 are fixed to the left-right direction at the front left and rear left sides of the body 62, respectively. The two second electric push rods 66 are respectively positioned opposite the front right end of the second support frame 63. The two parts are pushed into contact, and the two No. 5 distance measuring sensors 67 respectively measure the left and right distances of the front and rear parts of the right end of the No. 2 support frame 63. The left end of the body 62 is fixed with a handle 68, and the bottom right end of the body 62 is fixed with two No. 4 support frames 69. The two No. 4 support frames 69 are connected to the No. 3 support shaft 70 by rotating together in the front and rear direction. The front and rear ends of the No. 3 support shaft 70 are each fixed with a main roller 71 on the same axis. The bottom right end of the body 62 is fixed with a No. 2 reduction motor 72. The shaft of the No. 2 reduction motor 72 is parallel to the No. 2 support shaft 64, and the No. 2 support shaft 64 is connected by gear meshing. The No. 2 electric push rod 66, the No. 5 distance measuring sensor 67, the No. 2 reduction motor 72 and the electronic control system are electrically connected in four phases.

[0046] During the automatic movement of the self-propelled transport vehicle 1, the second electric push rod 66 is extended to push the second support frame 63. The distance between the front and rear ends of the second support frame 63 is detected by the fifth distance sensor 67, which can be used to calculate whether the second support shaft 64 is parallel to the third support shaft 70. Based on this feedback, the second electric push rod 66 is adjusted until it is parallel. Then, the second reduction motor 72 is controlled to rotate, which causes the third support shaft 70 to rotate through gear transmission. This allows the main roller 71 to drive the device to move in a straight line. When straight-line movement is not required, by controlling the extension of the second electric push rod 66 to different degrees, the second support frame 63 can be made to present different angles relative to the vehicle body 62, thus enabling the corresponding trajectory movement.

[0047] The bottom of the second support frame 63 is fixed with two vertical electric push rods 73 at the front and rear ends, and each of the front and rear ends is slidably connected to a sliding seat 74. The push rods of the two electric push rods 73 are fixed to the sliding seats 74 respectively. The two sliding seats 74 are fixed with second support cylinders 75 along the front-rear direction. When the sliding seats 74 move up and down to a certain position, the second support cylinders 75 are coaxial with the second support shaft 64. The two second support cylinders 75 are rotatably connected to guide rings 76 on the same axis. The two guide rings 76 are slidably connected to rollers 77 on the same axis. The adjacent ends of the two rollers 77 are fixed with support plates 78 respectively. Permanent magnets 79 are fixed to the opposite ends of the plates 78 respectively. Electromagnets 80 are coaxially fixed to the inner walls of the two second support cylinders 75 respectively. The electromagnets 80 and permanent magnets 79 correspond to each other front and back. The outer circumference of the two support plates 78 is conical and can be in close contact with the front and rear parts of the auxiliary rollers 65 of the second support shaft 64 to form a rolling roller. Vertical sixth distance sensors 82 are fixed to the front and rear parts of the second support frame 63 respectively. The two sixth distance sensors 82 are used to measure the distance to the top of the two sliding seats 74 respectively. The third electric push rod 73, electromagnets 80 and sixth distance sensors 82 are electrically connected to the four phases of the electric control system respectively.

[0048] Furthermore, during the pouring process, the self-propelled transport vehicle 1 travels in a straight line. At this time, the third electric push rod 73 is extended, and the position of the second support cylinder 75 is determined using data measured by the sixth distance sensor 82, until the second support cylinder 75 is coaxial with the second support shaft 64. Then, a positive current is supplied to the electromagnet 80, causing magnetic repulsion between the electromagnet 80 and the permanent magnet 79. This allows the roller 77 to approach and contact the auxiliary roller 65, forming a compaction roller. Subsequently, the self-propelled transport vehicle 1... During the movement of the transport vehicle 1, the grouting roller can be used to compact the injected asphalt, improving the repair effect and quality of cracks. After the injection is completed, a reverse current is first passed to the electromagnet 80, which causes the electromagnet 80 and the permanent magnet 79 to attract each other magnetically, thereby moving the roller 77 away from the auxiliary roller 65. Then, the electric push rod 73 is controlled to retract appropriately, which allows the roller 77 to detach from the ground. At this time, it cannot form a grouting roller, but the auxiliary roller 65 is used to contact the ground, which can better steer and reduce wear.

[0049] The above description represents a preferred embodiment of the present invention. For those skilled in the art, any changes, modifications, substitutions, and variations made to the implementation methods without departing from the principles and spirit of the present invention, based on the teachings of the present invention, still fall within the protection scope of the present invention.

Claims

1. A multifunctional integrated road crack repair device, comprising a self-propelled transport vehicle (1), an electric injection mechanism, a battery pack (3), and an electronic control system (4), characterized in that: The self-propelled transport vehicle (1) can automatically travel along a straight path and is equipped with an electric filling mechanism, a battery pack (3) and an electronic control system (4). The electric filling mechanism includes an electric suction component and a second support base (6). The second support base (6) is fixed to the self-propelled transport vehicle (1). The second support base (6) is slidably connected to a second slider (7) at the front and rear, and a second servo motor (8) is fixed at the front end. A second ranging sensor (9) is fixed at the rear of the second support base (6). A second lead screw (10) is rotatably connected in the front-back direction. The second lead screw (10) is fixed on the same axis as the second servo motor (8) and is threadedly connected to the second slider (7). The second distance sensor (9) can measure the front-back distance of the rear end of the second slider (7). An injection pipe (11) is fixed at the bottom of the second slider (7). The injection pipe (11) is connected to the discharge end of the electric suction assembly through a high-temperature resistant hose. A fourth support is fixed on the right side of the self-propelled transport vehicle (1). The support base (12) is slidably connected to the fourth slider (13) and has the fourth servo motor (14) fixed at its front end. The fourth support base (12) is rotatably connected to the fourth lead screw (15) in the front-back direction and has the fourth distance sensor (16) fixed at its rear. The fourth distance sensor (16) can measure the distance to the rear end of the fourth slider (13). The fourth lead screw (15) is coaxially fixed with the shaft of the fourth servo motor (14) and is also fixed to the fourth slider. (13) Through thread connection, the bottom end of the fourth slider (13) is fixed with a number of vertically downward laser ranging sensors (17) in sequence from front to back. The electric filling mechanism, battery pack (3), electronic control system (4), second servo motor (8), second ranging sensor (9), fourth servo motor (14), fourth ranging sensor (16) and laser ranging sensor (17) are electrically connected. The electronic control system (4) is a known existing technology, such as a microcontroller and an industrial control computer.

2. The multifunctional integrated road crack repair equipment according to claim 1, characterized in that: The electric suction assembly includes a mixing tank (18), a first support frame (19), a first geared motor (20), a stirring paddle (21), an electric heating device (22), an aluminum alloy gear pump (23), and an electric valve (24). The self-propelled transport vehicle (1) is fixed with a vertical mixing tank (18), and a vertical first support frame (19) is fixed at the top. A vertical first geared motor (20) is fixed at the top of the first support frame (19). The stirring paddle (21) is coaxially fixed to the shaft of the first geared motor (20). The stirring paddle (21) is located inside the mixing tank (18). The self-propelled transport vehicle (1) is also fixed with an electric heating device (22). The electric heating device (22) surrounds... Around the mixing tank (18), the self-propelled transport vehicle (1) is also fixed with an aluminum alloy gear pump (23) and an electric valve (24). The aluminum alloy gear pump (23) and the electric valve (24) are both located below the mixing tank (18). The suction port of the aluminum alloy gear pump (23) is connected to the bottom of the mixing tank (18). The discharge port of the aluminum alloy gear pump (23) is connected to one port of the electric valve (24). The other port of the electric valve (24) is connected to the injection pipe (11) through a high-temperature resistant hose. The first gear motor (20), the electric heating device (22), the aluminum alloy gear pump (23), the electric valve (24) and the electrical control system (4) are electrically connected.

3. The multifunctional integrated road crack repair equipment according to claim 2, characterized in that: The self-propelled transport vehicle (1) has a vertical No. 3 support frame (25) fixed at the bottom. A No. 1 fan (26) is fixed at the bottom of the No. 3 support frame (25). The air outlet of the No. 1 fan (26) faces downward. The No. 1 fan (26) is connected to the electrical control system (4) and is located to the left of the No. 2 support seat (6).

4. The multifunctional integrated road crack repair equipment according to claim 3, characterized in that: The air inlet of the No. 1 fan (26) is fixedly connected to the No. 1 air inlet pipe (27). The self-propelled transport vehicle (1) is also fixed with an electric refrigeration device (83). The electric refrigeration device (83) is electrically connected to the electric control system (4). The No. 1 air inlet pipe (27) exchanges heat through the refrigeration end of the electric refrigeration device (83).

5. The multifunctional integrated road crack repair equipment according to claim 4, characterized in that: The top of the first support frame (19) is fixed with two vertical first electric push rods (28). The two first electric push rods (28) are jointly fixed with a flow guide (29). An air inlet (30) runs through the middle of the flow guide (29). The air inlet (30) is interlocked with the stirring paddle (21). The part of the flow guide (29) near the outer circumference and the air inlet (30) is low and the rest is high. A suction pipe (31) is fixed at the top. The suction pipe (31) runs through the top and bottom and can be connected to the first air inlet pipe (27) through an external hose. The first electric push rod (28) is electrically connected to the electrical control system (4). The first suction pipe (31) After passing through the cooling end of the electric cooling device (83), it also passes through the air filter (32). The air filter (32) includes a housing (33), an air filter element (34), and an inlet / outlet port (35). The self-propelled transport vehicle (1) is fixed with a bracket (36). The bracket (36) holds a horizontal housing (33). The housing (33) contains a dry air filter element (34) and is fixedly connected to two inlet / outlet ports (35). The two inlet / outlet ports (35) are respectively connected to the first air intake pipe (27). The guide shroud (29) can enter the mixing tank (18) so that its outer edge is fully in contact with the inner wall of the mixing tank (18).

6. The multifunctional integrated road crack repair device according to claim 5, characterized in that: The self-propelled transport vehicle (1) has a No. 3 support base (37) fixed at its bottom. The No. 3 support base (37) is slidably connected to a No. 3 slider (38) and is rotatably connected to a No. 3 lead screw (39) in the horizontal direction. The No. 3 support base (37) has a No. 3 servo motor (40) fixed at its front end and a No. 3 distance sensor (41) fixed at its rear end. The shaft of the No. 3 servo motor (40) is coaxially fixed with the No. 3 lead screw (39). The No. 3 lead screw (39) is threadedly connected to the No. 3 slider (38). The No. 3 distance sensor (41) can measure the front-to-back distance of the rear end of the No. 3 slider (38). The bottom end of the No. 3 slider (38) is fixed with a vertical No. 5 servo motor (42) and a No. 1 support cylinder (43). The shaft of the No. 5 servo motor (42) is coaxially fixed with a rotating seat (44). 4) Rotary connection with the first support cylinder (43), the bottom left of the rotating seat (44) is fixed with a vertical frame (45), the frame (45) is closed and fixed with a soft interception net (46), the lower right part of the frame (45) is fixed with a storage tank (47), the right side of the rotating seat (44) is fixed with a jet pipe (48) tilted to the lower left, the right side of the self-propelled transport vehicle (1) is fixed with a second fan (49), the air inlet of the second fan (49) faces to the right, the air outlet of the second fan (49) is fixedly connected to the first air outlet pipe (50), the first air outlet pipe (50) can be fixedly connected to the upper part of the jet pipe (48) through an external hose, the third servo motor (40), the third distance sensor (41), the fifth servo motor (42), the second fan (49) are electrically connected to the electrical control system (4).

7. The multifunctional integrated road crack repair device according to claim 6, characterized in that: The electric cooling device (83) uses semiconductor cooling. The heating end of the electric cooling device (83) is on top and the cooling end is on the bottom. The first air outlet pipe (50) passes through the heating end of the electric cooling device (83) and is fixedly connected to the upper part of the jet pipe (48) through an external hose. The self-propelled transport vehicle (1) has a first support seat (51) fixed on the left front and left rear. The two first support seats (51) are respectively slidably connected to two first sliders (52) on the left and right sides, and are respectively connected to bidirectional screws (53) rotating in the left and right directions. A servo motor (54) is fixed to the left side of the support (51). The shafts of the two servo motors (54) are fixed to the same axis as the two bidirectional lead screws (53). Two sliders (52) slidably connected to the same support (51) form a group. The two groups of sliders (52) are respectively fixed with traction belts (55). Vertical electric vibratory compactors (56) are fixed to the middle of the two traction belts (55). The servo motors (54) and electric vibratory compactors (56) are electrically connected to the electrical control system (4).

8. The multifunctional integrated road crack repair equipment according to claim 7, characterized in that: The bottom end of the flow guide (29) is fixed with a flow guide plate (57). The flow guide plate (57) and the flow guide (29) form a frustum-shaped flow channel (58). The suction pipe (31) is connected to the flow channel (58). There are two suction pipes (31), and they are fixedly connected to a first electric three-way valve (59). The first air outlet pipe (50) is fixedly connected to a second electric three-way valve (60) after passing through the heating end of the electric cooling device (83). The other port of the second electric three-way valve (60) is fixedly connected to a second air outlet pipe (61). The other two ports of the first electric three-way valve (59) are connected to the second air outlet pipe (61) and the first air inlet pipe (27) respectively through hoses. The first electric three-way valve (59) and the second electric three-way valve (60) are electrically connected to the electric control system (4).

9. A multifunctional integrated road crack repair device according to any one of claims 1-8, characterized in that: The self-propelled transport vehicle (1) includes a body (62), a second support frame (63), a second support shaft (64), an auxiliary roller (65), a second electric push rod (66), a fifth distance sensor (67), a handle (68), a fourth support frame (69), a third support shaft (70), a main roller (71), and a second geared motor (72). The second support frame (63) is rotatably connected to the left side of the body (62). The virtual rotation axis of the second support frame (63) is vertically set. The second support shaft (64) is fixed at the bottom of the second support frame (63) along the front-rear direction. The auxiliary roller (65) is coaxially rotatably connected to the middle of the second support shaft (64). The second electric push rod (66) and the fifth distance sensor (67) are fixed at the left front and left rear of the body (62) respectively along the left-right direction. The two second electric push rods (66) are respectively connected to the second support frame (69), the second support shaft (60), the third support shaft (70), the main roller (71), and the second geared motor (72). 3) The front and rear parts of the right end make contact by pushing. The two No. 5 distance measuring sensors (67) respectively measure the left and right distances of the front and rear parts of the right end of the No. 2 support frame (63). The left end of the vehicle body (62) is fixed with a handle (68). The bottom right end of the vehicle body (62) is fixed with two No. 4 support frames (69). The two No. 4 support frames (69) rotate together in the front and rear direction and are connected to the No. 3 support shaft (70). The front and rear ends of the No. 3 support shaft (70) are each fixed with a main roller (71). The bottom right end of the vehicle body (62) is fixed with a No. 2 reduction motor (72). The shaft of the No. 2 reduction motor (72) is parallel to the No. 2 support shaft (64) and is connected to the No. 2 support shaft (64) by gear meshing. The No. 2 electric push rod (66), the No. 5 distance measuring sensor (67), the No. 2 reduction motor (72) and the electronic control system (4) are electrically connected.

10. A multifunctional integrated road crack repair device according to claim 9, characterized in that: The bottom of the second support frame (63) is fixed with two vertical electric push rods (73) at the front and rear ends, and each of the front and rear ends is slidably connected to a sliding seat (74). The push rods of the two electric push rods (73) are fixed to the sliding seats (74). The two sliding seats (74) are fixed with second support cylinders (75) along the front and rear directions. When the sliding seats (74) move up and down to a certain position, the second support cylinders (75) can be coaxial with the second support shaft (64). The two second support cylinders (75) are rotatably connected to guide rings (76) on the same axis. The two guide rings (76) are slidably connected to rollers (77) on the same axis. The adjacent ends of the two rollers (77) are fixed with support plates (78). (78) Permanent magnets (79) are fixed to opposite ends respectively. Electromagnets (80) are coaxially fixed to the inner walls of the two second support cylinders (75). The electromagnets (80) and permanent magnets (79) are corresponding to each other. The outer circumference of the two support plates (78) is conical and can be in contact with the front and rear parts of the auxiliary rollers (65) of the second support shaft (64) to form a rolling roller. Vertical sixth distance sensors (82) are fixed to the front and rear parts of the second support frame (63). The two sixth distance sensors (82) are used to measure the distance to the top of the two sliding seats (74) respectively. The third electric push rod (73), electromagnets (80) and sixth distance sensors (82) are electrically connected to the electric control system (4).

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