Two-stage telescopic vehicle-mounted platform leveling system

Abstract

The invention discloses a two-stage telescopic vehicle-mounted platform leveling system, and belongs to the technical field of vehicle-mounted leveling, the two-stage telescopic vehicle-mounted platform leveling system comprises four leveling devices, a vehicle-mounted platform and loading equipment arranged on the vehicle-mounted platform, the four leveling devices are respectively arranged at four corners below the vehicle-mounted platform, an electric control box is arranged on the upper surface of the vehicle-mounted platform, and the electric control box is arranged on the lower surface of the vehicle-mounted platform. The lower surface of the vehicle-mounted platform is provided with a horizontal sensor, the horizontal sensor is electrically connected with the electric cabinet, the leveling device comprises a servo motor, a two-stage leveling supporting leg, a gear box and a landing disc, the upper end of the two-stage leveling supporting leg is telescopically connected with the gear box, the lower end of the two-stage leveling supporting leg is hinged to the landing disc, the gear box is connected with the servo motor, and the landing disc is connected with the servo motor. And the servo motor is electrically connected with the electric cabinet. According to the invention, the mechanical transmission level is effectively reduced, the fault risk is reduced, the reliability is improved, and the response speed and precision of dynamic leveling are greatly improved by organically combining the two levels of leveling support legs, the horizontal sensor and the servo motor.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle leveling, and particularly to a two-stage telescopic vehicle platform leveling system. Background Art

[0002] To ensure a stable and reliable working environment for the upper-mounted equipment of a vehicle platform, a leveling device needs to be adopted to lift and level the whole vehicle. The leveling device is installed below the vehicle platform, and the inclination angle of the vehicle platform is adjusted by controlling the elongation of the leveling device.

[0003] However, currently, the leveling device usually adopts a single-stage telescopic form, with limited elongation and insufficient adjustment margin, resulting in the vehicle platform being unable to be applicable to roads with large inclination angles; if the elongation of the leveling device is increased, the overall size of the leveling device needs to be increased to obtain a larger telescopic stroke, but such a device will occupy more space below the vehicle platform, inevitably reducing the passing performance and off-road performance of the whole vehicle.

[0004] Chinese patent document with publication number CN219159443U and publication date of June 9, 2023 discloses a hand-crank electric drive mechanism and an electric two-stage leveling outrigger for a vehicle platform. The hand-crank electric drive mechanism includes a drive box body. Opposite ends of the drive box body are respectively provided with a drive output port and an electric input port. One side of the drive box body different from the drive output port and the electric input port is provided as a hand-crank input port. A connecting shaft is rotatably assembled in the drive box body. One end of the connecting shaft is arranged corresponding to the drive output port, and the other end of the connecting shaft is arranged corresponding to the electric input port. A driven bevel gear is fixedly assembled on the connecting shaft, and the driven bevel gear penetrates through the connecting shaft. An active bevel gear shaft is also rotatably assembled in the drive box body. One end of the active bevel gear shaft is in meshing transmission assembly with the driven bevel gear, and the other end of the active bevel gear shaft is arranged corresponding to the hand-crank input port.

[0005] The electric two-stage leveling outrigger for a vehicle platform includes a hand-crank electric drive mechanism, a telescopic leg, a gear box, a speed reducer, a hand-crank wrench, a servo motor, and a brake. The same side of the gear box is provided with an input part and an output part. The input end of the telescopic leg is connected to the output part. The output end of the speed reducer is connected to the input part. One end of the connecting shaft of the hand-crank electric drive mechanism is connected to the input end of the speed reducer. The output shaft of the servo motor is connected to the other end of the connecting shaft. The brake is installed at one end of the servo motor away from the hand-crank electric drive mechanism. The hand-crank wrench is connected to one end of the active bevel gear shaft of the hand-crank electric drive mechanism.

[0006] The hand-crank electric drive mechanism and the electric two-stage leveling outrigger for a vehicle-mounted platform disclosed in this patent document adopt a direct drive structure. Through the design of the connecting shaft and the driving bevel gear shaft, it avoids multi-stage separated drive, increases the limited position separation of the driven bevel gear and the ball bearing, and improves the stability and wear resistance of the drive structure. However, due to the large number of mechanical drive levels, the failure risk increases and the reliability decreases, affecting the response speed and accuracy of dynamic leveling. Summary of the Invention

[0007] In order to overcome the defects of the above-mentioned prior art, the present invention provides a two-stage telescopic leveling system for a vehicle-mounted platform. The present invention effectively reduces the number of mechanical drive levels, reduces the failure risk, improves the reliability, and greatly improves the response speed and accuracy of dynamic leveling by organically combining the two-stage leveling outrigger, the horizontal sensor and the servo motor.

[0008] The present invention is realized through the following technical solutions: A two-stage telescopic leveling system for a vehicle-mounted platform, comprising a leveling device, a vehicle-mounted platform and an upper-mounted device arranged on the vehicle-mounted platform, characterized in that: there are four leveling devices, and the four leveling devices are respectively installed at the four corners below the vehicle-mounted platform; an electric control box is arranged on the upper surface of the vehicle-mounted platform, a horizontal sensor is arranged on the lower surface of the vehicle-mounted platform, and the horizontal sensor is electrically connected to the electric control box; the leveling device comprises a servo motor, a two-stage leveling outrigger, a gear box and a landing plate; the upper end of the two-stage leveling outrigger is telescopically connected to the gear box, the lower end of the two-stage leveling outrigger is hinged to the landing plate, the gear box is connected to the servo motor, and the servo motor is electrically connected to the electric control box.

[0009] The gear box comprises a first gear, a second gear, a third gear and a lead screw; the first gear is connected to the motor shaft of the servo motor, the second gear is respectively connected to the first gear and the third gear through gear meshing, and the lead screw is connected to the third gear.

[0010] The two-stage leveling outrigger comprises an outer square tube, a middle square tube, an inner square tube, a nut, a pulley, a steel wire rope and a ball head; the middle square tube is slidably connected to the outer square tube, the inner square tube is slidably connected to the middle square tube, the top of the middle square tube is fixedly connected to the nut, the nut is connected to the lead screw, the pulley is hinged to the middle square tube, the steel wire rope is wound around the pulley, one end of the steel wire rope is connected to the outer square tube, the other end of the steel wire rope is connected to the inner square tube, one end of the ball head is fixedly connected to the inner square tube, and the other end of the ball head is hinged to the landing plate.

[0011] A first limit end cover is fixedly connected to the outer square tube, and the first limit end cover is located at the bottom of the outer square tube.

[0012] The first limit end cover is used to limit the vertical movement of the middle square tube in the outer square tube.

[0013] A second limit end cap is fixedly connected to the middle square tube, and the second limit end cap is located at the bottom of the middle square tube.

[0014] The second limit end cap is used to limit the vertical movement of the inner square tube within the middle square tube.

[0015] One end of the lead screw sequentially passes through the outer square tube and the middle square tube and extends into the inner square tube.

[0016] The horizontal sensor is used to collect the vehicle body inclination data of the vehicle-mounted platform and transmit the vehicle body inclination data to the electric control box.

[0017] The electric control box is used to analyze and process the vehicle body inclination data and transmit the control signal to the servo motors of the four leveling devices.

[0018] The beneficial effects of the present invention are mainly manifested in the following aspects: 1. In the present invention, the mechanical transmission levels are effectively reduced, the failure risk is lowered, and the reliability is improved. By organically combining the two-stage leveling legs, the horizontal sensor and the servo motor, the response speed and accuracy of dynamic leveling are greatly improved.

[0019] 2. In the present invention, through the cooperation of the four independently controlled leveling devices with the horizontal sensor and the electric control box, the high-efficiency and high-precision dynamic leveling of the vehicle-mounted platform is realized, which is particularly suitable for mobile device scenarios that require rapid autonomous leveling and have high requirements for horizontal accuracy.

[0020] 3. In the present invention, the two-stage leveling legs include an outer square tube, a middle square tube, an inner square tube, a nut, a pulley, a steel rope and a ball head. The middle square tube is slidably connected to the outer square tube, the inner square tube is slidably connected to the middle square tube, the top of the middle square tube is fixedly connected to the nut, the nut is connected to the lead screw, the pulley is hinged to the middle square tube, the steel rope is wound around the pulley, one end of the steel rope is connected to the outer square tube, the other end of the steel rope is connected to the inner square tube, one end of the ball head is fixedly connected to the inner square tube, and the other end of the ball head is hinged to the landing disc. The two-stage leveling legs with this specific structure not only ensure the leveling range but also enhance the stability. The drive combination of the servo motor and the gearbox ensures the precise telescopic control of the two-stage leveling legs. The articulated landing disc design improves the terrain adaptability. The overall structure significantly improves the leveling accuracy and operation stability of the vehicle-mounted platform in complex environments while maintaining compactness.

[0021] 4. The present invention has a small overall size and sufficient elongation, which can ensure that the vehicle-mounted platform can carry out leveling operations on roads with large inclinations, greatly improving the leveling efficiency and accuracy.

[0022] 5. The leveling system of the present invention is highly integrated, with a simple and compact structure, convenient maintenance. When the leveling device is retracted, the overall size is small, saving the space under the vehicle-mounted platform, effectively improving the passing performance and off-road performance of the whole vehicle.

[0023] 6. In the present invention, the leveling device adopts a two-stage telescopic structure, which has the characteristics of a relatively short overall size, high working efficiency and sufficient elongation. The telescopic adjustment margin is large, which can ensure that the whole vehicle can quickly carry out the leveling operation on the road surface with a large inclination angle, improving the applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention will be further specifically described below in conjunction with the drawings in the specification and the specific embodiments, wherein: Figure 1 is a schematic structural diagram of the vehicle-mounted platform of the present invention in the transportation state; Figure 2 is a schematic structural diagram of the vehicle-mounted platform of the present invention in the lifting state; Figure 3 is a schematic structural diagram of the leveling device of the present invention; Figure 4 is a sectional view of the gearbox of the present invention; Figure 5 is a front sectional view of the two-stage leveling support leg of the present invention; Figure 6 is a side sectional view of the two-stage leveling support leg of the present invention; Reference numerals in the drawings: 100, vehicle-mounted platform; 200, leveling device; 300, upper-mounted equipment; 400, electric control box; 500, horizontal sensor; 201, servo motor; 202, two-stage leveling support leg; 203, gearbox; 204, landing plate; 2031, first gear; 2032, second gear; 2033, third gear; 2034, lead screw; 2021, outer square tube; 2022, middle square tube; 2023, inner square tube; 2024, nut; 2025, first limit end cover; 2026, second limit end cover; 2027, pulley; 2028, steel wire rope; 2029, ball head. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] Embodiment 1 See Figure 1, A two-stage telescopic vehicle-mounted platform leveling system, comprising a leveling device 200, a vehicle-mounted platform 100, and an upper-mounted device 300 provided on the vehicle-mounted platform 100. There are four leveling devices 200, and the four leveling devices 200 are respectively installed at the four corners below the vehicle-mounted platform 100. An electric control box 400 is provided on the upper surface of the vehicle-mounted platform 100, and a horizontal sensor 500 is provided on the lower surface of the vehicle-mounted platform 100. The horizontal sensor 500 is electrically connected to the electric control box 400. The leveling device 200 includes a servo motor 201, a two-stage leveling leg 202, a gearbox 203, and a landing plate 204. The upper end of the two-stage leveling leg 202 is telescopically connected to the gearbox 203, and the lower end of the two-stage leveling leg 202 is hinged to the landing plate 204. The gearbox 203 is connected to the servo motor 201, and the servo motor 201 is electrically connected to the electric control box 400.

[0026] This embodiment is the most basic implementation method, which effectively reduces the mechanical transmission level, reduces the failure risk, and improves the reliability. By organically combining the two-stage leveling leg 202, the horizontal sensor 500, and the servo motor 201, the response speed and accuracy of dynamic leveling are greatly improved.

[0027] Embodiment 2 See Figure 1 , A two-stage telescopic vehicle-mounted platform leveling system, comprising a leveling device 200, a vehicle-mounted platform 100, and an upper-mounted device 300 provided on the vehicle-mounted platform 100. There are four leveling devices 200, and the four leveling devices 200 are respectively installed at the four corners below the vehicle-mounted platform 100. An electric control box 400 is provided on the upper surface of the vehicle-mounted platform 100, and a horizontal sensor 500 is provided on the lower surface of the vehicle-mounted platform 100. The horizontal sensor 500 is electrically connected to the electric control box 400. The leveling device 200 includes a servo motor 201, a two-stage leveling leg 202, a gearbox 203, and a landing plate 204. The upper end of the two-stage leveling leg 202 is telescopically connected to the gearbox 203, and the lower end of the two-stage leveling leg 202 is hinged to the landing plate 204. The gearbox 203 is connected to the servo motor 201, and the servo motor 201 is electrically connected to the electric control box 400.

[0028] The gearbox 203 includes a first gear 2031, a second gear 2032, a third gear 2033, and a lead screw 2034. The first gear 2031 is connected to the motor shaft of the servo motor 201. The second gear 2032 is respectively connected to the first gear 2031 and the third gear 2033 through gear meshing. The lead screw 2034 is connected to the third gear 2033.

[0029] This embodiment is a preferred implementation. Through four independently controlled leveling devices 200 in cooperation with a horizontal sensor 500 and an electric control box 400, high-efficiency and high-precision dynamic leveling of the vehicle-mounted platform 100 is achieved, which is particularly suitable for mobile device scenarios that require rapid autonomous leveling and have high requirements for horizontal accuracy.

[0030] Embodiment 3 See Figure 1 , a two-stage telescopic vehicle-mounted platform leveling system, including a leveling device 200, a vehicle-mounted platform 100, and an upper-mounted device 300 arranged on the vehicle-mounted platform 100. There are four leveling devices 200, and the four leveling devices 200 are respectively installed at the four corners under the vehicle-mounted platform 100. An electric control box 400 is arranged on the upper surface of the vehicle-mounted platform 100, and a horizontal sensor 500 is arranged on the lower surface of the vehicle-mounted platform 100. The horizontal sensor 500 is electrically connected to the electric control box 400. The leveling device 200 includes a servo motor 201, a two-stage leveling leg 202, a gearbox 203, and a landing plate 204. The upper end of the two-stage leveling leg 202 is telescopically connected to the gearbox 203, and the lower end of the two-stage leveling leg 202 is hinged to the landing plate 204. The gearbox 203 is connected to the servo motor 201, and the servo motor 201 is electrically connected to the electric control box 400.

[0031] The gearbox 203 includes a first gear 2031, a second gear 2032, a third gear 2033, and a lead screw 2034. The first gear 2031 is connected to the motor shaft of the servo motor 201, the second gear 2032 is respectively connected to the first gear 2031 and the third gear 2033 through gear meshing, and the lead screw 2034 is connected to the third gear 2033.

[0032] Preferably, the two-stage leveling leg 202 includes an outer square tube 2021, a middle square tube 2022, an inner square tube 2023, a nut 2024, a pulley 2027, a steel rope 2028, and a ball head 2029. The middle square tube 2022 is slidably connected to the outer square tube 2021, the inner square tube 2023 is slidably connected to the middle square tube 2022. The top of the middle square tube 2022 is fixedly connected to the nut 2024, the nut 2024 is connected to the lead screw 2034, the pulley 2027 is hinged to the middle square tube 2022, the steel rope 2028 is wound around the pulley 2027, one end of the steel rope 2028 is connected to the outer square tube 2021, the other end of the steel rope 2028 is connected to the inner square tube 2023, one end of the ball head 2029 is fixedly connected to the inner square tube 2023, and the other end of the ball head 2029 is hinged to the landing plate 204.

[0033] This embodiment is another preferred embodiment. The two-stage leveling leg 202 includes an outer square tube 2021, a middle square tube 2022, an inner square tube 2023, a nut 2024, a pulley 2027, a steel cable 2028, and a ball head 2029. The middle square tube 2022 is slidably connected to the outer square tube 2021, and the inner square tube 2023 is slidably connected to the middle square tube 2022. The top of the middle square tube 2022 is fixedly connected to the nut 2024, and the nut 2024 is connected to the lead screw 2034. The pulley 2027 is hinged to the middle square tube 2022, and the steel cable 2028 is wound around the pulley 2027. One end of the steel cable 2028 is connected to the outer square tube 2021, and the other end of the steel cable 2028 is connected to the inner square tube 2023. One end of the ball head 2029 is fixedly connected to the inner square tube 2023, and the other end of the ball head 2029 is hinged to the landing disc 204. With the two-stage leveling leg 202 of this specific structure, both the leveling range and the stability are ensured. The drive combination of the servo motor 201 and the gearbox 203 ensures precise telescopic control of the two-stage leveling leg 202. The articulated landing disc 204 design improves the terrain adaptability. The overall structure significantly improves the leveling accuracy and operation stability of the vehicle-mounted platform 100 in complex environments while maintaining compactness.

[0034] Embodiment 4 See Figure 1 , a two-stage telescopic vehicle-mounted platform leveling system, includes a leveling device 200, a vehicle-mounted platform 100, and an upper-mounted device 300 provided on the vehicle-mounted platform 100. There are four leveling devices 200, and the four leveling devices 200 are respectively installed at the four corners under the vehicle-mounted platform 100. An electric control box 400 is provided on the upper surface of the vehicle-mounted platform 100, and a horizontal sensor 500 is provided on the lower surface of the vehicle-mounted platform 100. The horizontal sensor 500 is electrically connected to the electric control box 400. The leveling device 200 includes a servo motor 201, a two-stage leveling leg 202, a gearbox 203, and a landing disc 204. The upper end of the two-stage leveling leg 202 is telescopically connected to the gearbox 203, and the lower end of the two-stage leveling leg 202 is hinged to the landing disc 204. The gearbox 203 is connected to the servo motor 201, and the servo motor 201 is electrically connected to the electric control box 400.

[0035] The gearbox 203 includes a first gear 2031, a second gear 2032, a third gear 2033, and a lead screw 2034. The first gear 2031 is connected to the motor shaft of the servo motor 201, the second gear 2032 is respectively connected to the first gear 2031 and the third gear 2033 through gear meshing, and the lead screw 2034 is connected to the third gear 2033.

[0036] The two-stage leveling outrigger 202 includes an outer square tube 2021, a middle square tube 2022, an inner square tube 2023, a nut 2024, a pulley 2027, a steel cable 2028, and a ball head 2029. The middle square tube 2022 is slidably connected to the outer square tube 2021, and the inner square tube 2023 is slidably connected to the middle square tube 2022. The top of the middle square tube 2022 is fixedly connected to the nut 2024, and the nut 2024 is connected to the lead screw 2034. The pulley 2027 is hinged to the middle square tube 2022, and the steel cable 2028 is wound around the pulley 2027. One end of the steel cable 2028 is connected to the outer square tube 2021, and the other end of the steel cable 2028 is connected to the inner square tube 2023. One end of the ball head 2029 is fixedly connected to the inner square tube 2023, and the other end of the ball head 2029 is hinged to the landing disc 204.

[0037] A first limit end cover 2025 is fixedly connected to the outer square tube 2021, and the first limit end cover 2025 is located at the bottom of the outer square tube 2021.

[0038] The first limit end cover 2025 is used to limit the vertical movement of the middle square tube 2022 within the outer square tube 2021.

[0039] This embodiment is another preferred embodiment, which has a small overall size and sufficient elongation, and can ensure that the vehicle-mounted platform 100 can carry out leveling operations on roads with a large inclination angle, greatly improving the leveling efficiency and leveling accuracy.

[0040] Embodiment 5 See Figure 1 , a two-stage telescopic vehicle-mounted platform leveling system, includes a leveling device 200, a vehicle-mounted platform 100, and an upper-mounted device 300 provided on the vehicle-mounted platform 100. There are four leveling devices 200, and the four leveling devices 200 are respectively installed at the four corners below the vehicle-mounted platform 100. An electric control box 400 is provided on the upper surface of the vehicle-mounted platform 100, and a horizontal sensor 500 is provided on the lower surface of the vehicle-mounted platform 100. The horizontal sensor 500 is electrically connected to the electric control box 400. The leveling device 200 includes a servo motor 201, a two-stage leveling outrigger 202, a gear box 203, and a landing disc 204. The upper end of the two-stage leveling outrigger 202 is telescopically connected to the gear box 203, and the lower end of the two-stage leveling outrigger 202 is hinged to the landing disc 204. The gear box 203 is connected to the servo motor 201, and the servo motor 201 is electrically connected to the electric control box 400.

[0041] The gearbox 203 includes a first gear 2031, a second gear 2032, a third gear 2033, and a lead screw 2034. The first gear 2031 is connected to the motor shaft of the servo motor 201. The second gear 2032 is connected to the first gear 2031 and the third gear 2033 respectively through gear meshing. The lead screw 2034 is connected to the third gear 2033.

[0042] The two-stage leveling leg 202 includes an outer square tube 2021, a middle square tube 2022, an inner square tube 2023, a nut 2024, a pulley 2027, a steel cable 2028, and a ball head 2029. The middle square tube 2022 is slidably connected to the outer square tube 2021. The inner square tube 2023 is slidably connected to the middle square tube 2022. The top of the middle square tube 2022 is fixedly connected to the nut 2024. The nut 2024 is connected to the lead screw 2034. The pulley 2027 is hinged to the middle square tube 2022. The steel cable 2028 is wound around the pulley 2027. One end of the steel cable 2028 is connected to the outer square tube 2021, and the other end of the steel cable 2028 is connected to the inner square tube 2023. One end of the ball head 2029 is fixedly connected to the inner square tube 2023, and the other end of the ball head 2029 is hinged to the landing disc 204.

[0043] Further preferably, a first limit end cover 2025 is fixedly connected to the outer square tube 2021, and the first limit end cover 2025 is located at the bottom of the outer square tube 2021.

[0044] The first limit end cover 2025 is used to limit the vertical movement of the middle square tube 2022 within the outer square tube 2021.

[0045] A second limit end cover 2026 is fixedly connected to the middle square tube 2022, and the second limit end cover 2026 is located at the bottom of the middle square tube 2022.

[0046] The second limit end cover 2026 is used to limit the vertical movement of the inner square tube 2023 within the middle square tube 2022.

[0047] One end of the lead screw 2034 sequentially penetrates through the outer square tube 2021 and the middle square tube 2022 and extends into the inner square tube 2023.

[0048] This embodiment is another preferred embodiment. The leveling system is highly integrated, with a simple and compact structure, convenient maintenance. When the leveling device 200 is retracted, the overall size is small, saving the space below the vehicle-mounted platform 100 and effectively improving the vehicle's passing and off-road performance.

[0049] Embodiment 6 See Figure 1, A two-stage telescopic vehicle-mounted platform leveling system, including a leveling device 200, a vehicle-mounted platform 100, and an upper-mounted device 300 provided on the vehicle-mounted platform 100. There are four leveling devices 200, and the four leveling devices 200 are respectively installed at the four corners under the vehicle-mounted platform 100. An electric control box 400 is provided on the upper surface of the vehicle-mounted platform 100, and a horizontal sensor 500 is provided on the lower surface of the vehicle-mounted platform 100. The horizontal sensor 500 is electrically connected to the electric control box 400. The leveling device 200 includes a servo motor 201, a two-stage leveling leg 202, a gear box 203, and a landing plate 204. The upper end of the two-stage leveling leg 202 is telescopically connected to the gear box 203, and the lower end of the two-stage leveling leg 202 is hinged to the landing plate 204. The gear box 203 is connected to the servo motor 201, and the servo motor 201 is electrically connected to the electric control box 400.

[0050] The gear box 203 includes a first gear 2031, a second gear 2032, a third gear 2033, and a lead screw 2034. The first gear 2031 is connected to the motor shaft of the servo motor 201. The second gear 2032 is respectively connected to the first gear 2031 and the third gear 2033 through gear meshing. The lead screw 2034 is connected to the third gear 2033.

[0051] The two-stage leveling leg 202 includes an outer square tube 2021, a middle square tube 2022, an inner square tube 2023, a nut 2024, a pulley 2027, a steel rope 2028, and a ball head 2029. The middle square tube 2022 is slidably connected to the outer square tube 2021. The inner square tube 2023 is slidably connected to the middle square tube 2022. The top of the middle square tube 2022 is fixedly connected to the nut 2024. The nut 2024 is connected to the lead screw 2034. The pulley 2027 is hinged to the middle square tube 2022. The steel rope 2028 is wound around the pulley 2027. One end of the steel rope 2028 is connected to the outer square tube 2021, and the other end of the steel rope 2028 is connected to the inner square tube 2023. One end of the ball head 2029 is fixedly connected to the inner square tube 2023, and the other end of the ball head 2029 is hinged to the landing plate 204.

[0052] A first limit end cover 2025 is fixedly connected to the outer square tube 2021, and the first limit end cover 2025 is located at the bottom of the outer square tube 2021.

[0053] The first limit end cover 2025 is used to limit the vertical movement of the middle square tube 2022 in the outer square tube 2021.

[0054] A second limit end cover 2026 is fixedly connected to the middle square tube 2022, and the second limit end cover 2026 is located at the bottom of the middle square tube 2022.

[0055] The second limit end cap 2026 is used to limit the vertical movement of the inner square tube 2023 within the middle square tube 2022.

[0056] One end of the lead screw 2034 sequentially penetrates through the outer square tube 2021 and the middle square tube 2022 and extends into the inner square tube 2023.

[0057] The horizontal sensor 500 is used to collect the vehicle body inclination data of the vehicle-mounted platform 100 and transmit the vehicle body inclination data to the electric control box 400.

[0058] The electric control box 400 is used to analyze and process the vehicle body inclination data and transmit the control signal to the servo motors 201 of the four leveling devices 200.

[0059] In this embodiment, which is the best implementation mode, the leveling device 200 adopts a two-stage telescopic structure, featuring a relatively short overall size, high working efficiency, sufficient elongation, a large telescopic adjustment margin, and the ability to ensure that the vehicle can quickly carry out the leveling operation on a road surface with a large inclination, thereby improving the applicability.

[0060] The working principle of the present invention is as follows: The upper mounting equipment 300 is installed above the vehicle-mounted platform 100. The upper mounting equipment 300 does not have working conditions during the transportation of the vehicle-mounted platform 100 and can work when the vehicle-mounted platform 100 is in a stable and reliable state.

[0061] As Figure 1 and Figure 2 shown, four leveling devices 200 are installed at the four corners below the vehicle-mounted platform 100. When the vehicle-mounted platform 100 is in transportation, the leveling devices 200 are in the retracted state; when the vehicle-mounted platform 100 is parked, the leveling devices 200 extend, putting the vehicle-mounted platform 100 in a lifting and leveling state to provide stable and reliable working conditions for the upper mounting equipment. The horizontal sensor 500 is installed in the middle of the vehicle-mounted platform 100. The horizontal sensor 500 can continuously and real-time collect the inclination angles of the vehicle-mounted platform 100 in the X-axis direction and the Y-axis direction and transmit the inclination angle data to the PLC controller in the electric control box 400. The PLC controller takes the inclination angle data of the vehicle-mounted platform 100 as the input quantity and the rotation quantity of the servo motors 201 in the four leveling devices 200 as the output control quantity. Based on the inclination angle data of the vehicle-mounted platform 100, it overall controls the rotation quantity of the servo motors 201 in the four leveling devices 200, thereby controlling the elongation amount of the four leveling devices 200, and finally controlling the inclination angles of the vehicle-mounted platform 100 in the X-axis direction and the Y-axis direction within the range of 0 - 0.1°, enabling the vehicle-mounted platform to be in a stable and reliable state under different inclined road surfaces.

[0062] As Figure 3 shown, the servo motor 201 provides the driving torque, and the rotation speed and rotation quantity of the servo motor 201 are controlled by the electric control box 400; As Figure 4 and Figure 5 shown, when the leveling device extends, the driving torque generated by the servo motor 201 is transmitted to the lead screw 2034 through the first gear 2031, the second gear 2032, and the third gear 2033. The lead screw 2034 rotates, causing the nut 2024 to move downward, thereby driving the middle-layer square tube 2022 to move downward; the pulley 2027 is hinged to the middle-layer square tube 2022 and moves downward synchronously; the pulley 2027 also rotates counterclockwise while moving downward; when the pulley 2027 moves, the steel cable 2028 connected to the inner-layer square tube 2023 moves downward, and the movement of the steel cable 2028 drives the inner-layer square tube 2023 to move downward.

[0063] As Figure 6 shown, the working process of the two-stage leveling leg is as follows: The lead screw 2034 rotates, and the nut 2024 cooperating with the lead screw 2034 moves downward. Let the movement speed of the nut 2024 be v; since the nut 2024 is fixedly connected to the middle-layer square tube 2022, it drives the middle-layer square tube 2022 to move downward, and the movement speed is v; since the pulley 2027 is hinged to the middle-layer square tube 2022, the pulley 2027 moves downward synchronously, and the movement speed at the center of the wheel is the same as that of the middle-layer square tube 2022, which is also v. Taking the pulley 2027 and the steel cable 2028 as the research objects, the right side of the steel cable 2028 cannot move, while the left side of the steel cable 2028 has the condition to move. Therefore, the pulley 2027 will rotate counterclockwise. Let the angular velocity of the pulley 2027 be ω. The instantaneous center of motion of the pulley 2027 is at the right tangent point o between the pulley and the steel cable 2028, and the speed is 0. The quantitative relationship between the movement speed v of the center of the pulley 2027, the rotational angular velocity ω, and the radius is v = ω·r.

[0064] The speed of the left tangent point A between the pulley 2027 and the steel cable 2028 is ω·2r = 2v, and the movement direction is vertically downward. The left side of the steel cable 2028 moves downward, pulling the inner-layer square tube 2023 to move downward synchronously, and the speed is 2v.

[0065] Based on the above analysis, it can be known that: during the extension movement of the two-stage leveling leg 202, the outer-layer square tube 2021 remains fixed, the middle-layer square tube 2022 and the inner-layer square tube 2023 move downward. The relative speed v between the middle-layer square tube 2022 and the outer-layer square tube 2021 is equal to the relative speed between the inner-layer square tube 2023 and the middle-layer square tube 2022, which is 2v - v = v. That is, the two-stage square tubes expand and contract synchronously, and the elongation amount relative to the upper stage is the same.

[0066] Compared with the leveling device of the prior art, if the required external dimensions are the same, the elongation of the present invention is significantly greater than that of the conventional first-stage telescopic leveling device. The elongation of the conventional first-stage telescopic leveling device is equal to the length of its leg piston cylinder. The present invention adopts a two-stage telescopic form, and its elongation is twice the length of the leg piston cylinder; if the required elongation is the same, the external dimensions of the present invention are significantly smaller than those of the conventional first-stage telescopic leveling device; if the required elongation is the same, the telescopic speed of the present invention is twice that of the conventional first-stage telescopic leveling device, and the working duration is 50% of that of the conventional first-stage telescopic leveling device, and the working efficiency is doubled.

Claims

1. A two-stage telescopic vehicle-mounted platform leveling system, comprising a leveling device (200), a vehicle-mounted platform (100), and an upper-mounted device (300) provided on the vehicle-mounted platform (100), characterized in that: There are four leveling devices (200), and the four leveling devices (200) are respectively installed at the four corners under the vehicle-mounted platform (100). An electric control box (400) is arranged on the upper surface of the vehicle-mounted platform (100), and a horizontal sensor (500) is arranged on the lower surface of the vehicle-mounted platform (100). The horizontal sensor (500) is electrically connected to the electric control box (400). The leveling device (200) includes a servo motor (201), a two-stage leveling leg (202), a gear box (203) and a landing plate (204). The upper end of the two-stage leveling leg (202) is telescopically connected to the gear box (203), and the lower end of the two-stage leveling leg (202) is hinged to the landing plate (204). The gear box (203) is connected to the servo motor (201), and the servo motor (201) is electrically connected to the electric control box (400).

2. The two-stage telescopic vehicle-mounted platform leveling system according to claim 1, characterized in that: The gear box (203) includes a first gear (2031), a second gear (2032), a third gear (2033) and a lead screw (2034). The first gear (2031) is connected to the motor shaft of the servo motor (201). The second gear (2032) is respectively connected to the first gear (2031) and the third gear (2033) through gear meshing. The lead screw (2034) is connected to the third gear (2033).

3. A two-stage telescopic vehicle-mounted platform leveling system according to claim 2, characterized in that: The two-stage leveling leg (202) includes an outer square tube (2021), a middle square tube (2022), an inner square tube (2023), a nut (2024), a pulley (2027), a steel cable (2028) and a ball head (2029). The middle square tube (2022) is slidably connected to the outer square tube (2021), and the inner square tube (2023) is slidably connected to the middle square tube (2022). The top of the middle square tube (2022) is fixedly connected to the nut (2024), and the nut (2024) is connected to the lead screw (2034). The pulley (2027) is hinged to the middle square tube (2022). The steel cable (2028) is wound around the pulley (2027). One end of the steel cable (2028) is connected to the outer square tube (2021), and the other end of the steel cable (2028) is connected to the inner square tube (2023). One end of the ball head (2029) is fixedly connected to the inner square tube (2023), and the other end of the ball head (2029) is hinged to the landing plate (204).

4. A two-stage telescopic vehicle-mounted platform leveling system according to claim 3, characterized in that: A first limit end cover (2025) is fixedly connected to the outer square tube (2021), and the first limit end cover (2025) is located at the bottom of the outer square tube (2021).

5. A two-stage telescopic vehicle-mounted platform leveling system according to claim 4, characterized in that: The first limit end cover (2025) is used to limit the vertical movement of the middle square tube (2022) in the outer square tube (2021).

6. A two-stage telescopic vehicle-mounted platform leveling system according to claim 3, characterized in that: A second limit end cover (2026) is fixedly connected to the middle square tube (2022), and the second limit end cover (2026) is located at the bottom of the middle square tube (2022).

7. The two-stage telescopic vehicle-mounted platform leveling system according to claim 6, characterized in that: The second limit end cover (2026) is used to limit the vertical movement of the inner square tube (2023) in the middle square tube (2022).

8. A two-stage telescopic vehicle-mounted platform leveling system according to claim 3, characterized in that: One end of the lead screw (2034) sequentially penetrates through the outer square tube (2021) and the middle square tube (2022), and extends into the inner square tube (2023).

9. A two-stage telescopic vehicle-mounted platform leveling system according to claim 1, characterized in that: The horizontal sensor (500) is configured to collect the vehicle body inclination data of the vehicle-mounted platform (100) and transmit the vehicle body inclination data to the electric control box (400).

10. A two-stage telescopic vehicle-mounted platform leveling system according to claim 1, characterized in that: The electric control box (400) is configured to analyze and process the vehicle body inclination data and transmit a control signal to the servo motors (201) of the four leveling devices (200).

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