Aerial work platform chassis outrigger self-adaptive leveling system

Abstract

The utility model relates to a kind of self-adapting leveling system of aerial work platform chassis supporting leg, including work vehicle chassis, supporting leg system, hydraulic system, double-shaft inclination sensor, controller, four groups of the supporting leg system are respectively arranged in the four corners of the work vehicle chassis, the double-shaft inclination sensor is arranged in the positive center of the work vehicle chassis, the controller is electrically connected with the hydraulic system and the double-shaft inclination sensor. The utility model sets up supporting leg system in the four corners of work vehicle chassis, first rotating supporting leg and second rotating supporting leg form parallelogram mechanism, so that vertical supporting leg keeps vertical movement deployment, support disc is hinged with vertical supporting leg bottom, allowing support surface to adapt to ground inclination;Stroke sensor is set on hydraulic cylinder, double-shaft inclination sensor is set on work vehicle chassis, and the signal transmitted by stroke sensor, double-shaft inclination sensor, pressure sensor is operated using PLC controller, and the signal is operated, and the body platform is properly leveled.

Description

Technical Field

[0001] This utility model relates to the field of aerial work platform technology, and in particular to an adaptive leveling system for the outriggers of an aerial work platform chassis. Background Technology

[0002] A scissor lift aerial work platform is a mobile work platform that uses a cross-telescopic boom to achieve vertical lifting and lowering. It is widely used in high-altitude operations in construction, municipal engineering, power, warehousing, and other fields. Its core advantages lie in its strong load-bearing capacity, large working range, and compact structure. After the scissor lift platform is raised, its center of gravity increases. Even a slight tilt of the ground can amplify the platform's tilt angle, posing a risk of tipping over. Leveling compensation using outriggers is necessary to ensure the platform remains level at all times. The compact structure of the scissor lift aerial work platform requires that the outriggers be easily folded while mounted on the chassis without affecting the scissor lift platform itself. It also needs to automatically and synchronously drive the outriggers to achieve adaptive leveling of the chassis. Utility Model Content

[0003] This utility model aims to address the shortcomings of existing technologies by providing an adaptive leveling system for the outriggers of an aerial work platform chassis.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: an adaptive leveling system for outriggers of an aerial work platform chassis, comprising an aerial work platform chassis, an outrigger system, a hydraulic system, a dual-axis tilt sensor, and a controller. The four outrigger systems are respectively disposed at the four corners of the aerial work platform chassis, and the dual-axis tilt sensor is disposed at the center of the aerial work platform chassis. The controller is electrically connected to the hydraulic system and the dual-axis tilt sensor.

[0005] The outrigger system includes a hydraulic cylinder, a first rotating outrigger, a second rotating outrigger, a vertical outrigger, and a support plate. Several rotating seats are provided at both ends of the work vehicle chassis. One end of the first rotating outrigger is hinged to the upper rotating seat, and the other end is hinged to the piston rod of the hydraulic cylinder and the top of the vertical outrigger. The second rotating outrigger is arranged parallel to the first rotating outrigger, with one end hinged to the lower rotating seat and the other end hinged to the middle portion of the vertical outrigger. The cylinder body of the hydraulic cylinder is hinged between the lower rotating seats, and the bottom of the vertical outrigger is hinged to the support plate.

[0006] Furthermore, the support plate has a sliding groove, a pressure sensor is installed at the top of the sliding groove, a spring is fixed at the upper end of the sliding groove, a slider is fixedly installed at the lower end of the spring, and the pressure sensor is electrically connected to the dual-axis tilt sensor.

[0007] Furthermore, the hydraulic system includes: a hydraulic oil tank, a hydraulic pump, and four sets of proportional directional valves. The hydraulic oil tank is connected to the suction port of the hydraulic pump. The hydraulic pump is connected to the inlet port of the proportional directional valves through an oil delivery pipeline. The proportional directional valves are connected to the hydraulic cylinders. A stroke sensor is installed in the hydraulic cylinders. The hydraulic cylinders are connected to the proportional directional valves and the hydraulic oil tanks in sequence through a return oil pipeline.

[0008] Furthermore, the hydraulic system also includes a relief valve, the inlet of which is connected to the oil port branch of the hydraulic pump, and the outlet of which is connected to the hydraulic oil tank.

[0009] Furthermore, the hydraulic pump is driven by an electric motor, and a hydraulic lock and a shut-off valve are also provided between the proportional directional valve and the hydraulic cylinder.

[0010] Furthermore, the controller is a PLC controller.

[0011] The beneficial effects of this utility model are as follows: This utility model sets out a support leg system at the four corners of the work vehicle chassis. The first rotating support leg and the second rotating support leg form a parallelogram mechanism, which allows the vertical support leg to move and unfold vertically. The support plate is hinged to the bottom of the vertical support leg, allowing the support surface to adapt to the ground tilt angle. A stroke sensor is set on the hydraulic cylinder, and a dual-axis tilt sensor is set on the work vehicle chassis. The PLC controller is used to process the signals from the stroke sensor, the dual-axis tilt sensor, and the pressure sensor. The PID algorithm is used to accurately control the extension and retraction of the hydraulic cylinder to properly level the vehicle platform. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a cross-sectional schematic diagram of the outrigger system.

[0014] Figure 3 This is a top view of the first rotating leg and the second rotating leg;

[0015] Figure 4 This is a cross-sectional view of the support plate;

[0016] Figure 5 This is a schematic diagram of a hydraulic system;

[0017] In the diagram: 1-Work vehicle chassis; 2-Outrigger system; 20-Hydraulic cylinder; 21-First rotating outrigger; 22-Second rotating outrigger; 23-Vertical outrigger; 24-Support plate; 25-Pressure sensor; 26-Spring; 27-Slider; 3-Hydraulic system; 30-Hydraulic oil tank; 31-Hydraulic pump; 32-Proportional directional valve; 33-Stroke sensor; 34-Relief valve; 4-Dual-axis tilt sensor;

[0018] The accompanying drawings in this utility model are all schematic diagrams and their sizes do not represent actual dimensions.

[0019] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0021] like Figures 1-5 As shown, an adaptive leveling system for outriggers of an aerial work platform chassis includes an aerial work platform chassis 1, outrigger systems 2, hydraulic systems 3, dual-axis tilt sensors 4, and a controller. Four sets of outrigger systems 2 are respectively located at the four corners of the aerial work platform chassis 1, and the dual-axis tilt sensors 4 are located at the center of the aerial work platform chassis 1. The controller is electrically connected to the hydraulic systems 3 and the dual-axis tilt sensors 4.

[0022] The outrigger system 2 includes: a hydraulic cylinder 20, a first rotating outrigger 21, a second rotating outrigger 22, a vertical outrigger 23, and a support plate 24. The chassis 1 of the work vehicle is provided with several rotating seats at both ends. One end of the first rotating outrigger 21 is hinged to the upper rotating seat, and the other end is hinged to the piston rod of the hydraulic cylinder 20 and the top of the vertical outrigger 23. The second rotating outrigger 22 is arranged parallel to the first rotating outrigger 21, with one end hinged to the lower rotating seat and the other end hinged to the middle part of the vertical outrigger 23. The cylinder end of the hydraulic cylinder 20 is hinged between the lower rotating seats, and the bottom of the vertical outrigger 23 is hinged to the support plate 24.

[0023] Specifically, the first rotating outrigger 21 and the second rotating outrigger 22 form a parallelogram mechanism. With the extension and retraction of the hydraulic cylinder 20, the outrigger system 2 can retract to both ends of the work vehicle chassis 1, so that the vertical outrigger 23 can move and unfold vertically. The support plate 24 is hinged to the bottom of the vertical outrigger 23, allowing the support plate 24 to adapt to the ground tilt angle and avoid the problem of the outrigger being ineffective due to hard contact.

[0024] The support plate 24 has a sliding groove, a pressure sensor 25 is provided at the top of the sliding groove, a spring 26 is fixed at the upper end of the sliding groove, and a slider 27 is fixedly installed at the lower end of the spring 26. The pressure sensor 25 is electrically connected to the dual-axis tilt sensor 4.

[0025] Specifically, the support plate 24 is equipped with a spring slider system. When the support plate 24 contacts the ground, the slider 27 slides in the groove to compress the spring 26. The pressure sensor 25 monitors the pressure of the spring 26 in real time, feeds back the ground reaction force, and determines whether the support plate 24 contacts the ground.

[0026] The hydraulic system 3 includes: a hydraulic oil tank 30, a hydraulic pump 31, and four sets of proportional directional valves 32. The hydraulic oil tank 30 is connected to the oil suction port of the hydraulic pump 31. The hydraulic pump 31 is connected to the oil inlet of the proportional directional valve 32 through an oil delivery pipeline. The proportional directional valve 32 is connected to the hydraulic cylinder 20. A stroke sensor 33 is installed in the hydraulic cylinder 20. The hydraulic cylinder 20 is connected to the proportional directional valve 32 and the hydraulic oil tank 30 in sequence through a return oil pipeline.

[0027] Specifically, the stroke sensor 33 detects the extension and retraction of the hydraulic cylinder 20 in real time and transmits the signal to the controller. After receiving the signal and performing calculations, the controller outputs an electrical signal to control the proportional directional valve 32. The opening of the throttling window of the proportional directional valve 32 changes continuously with the magnitude of the input electrical signal. By controlling the magnitude of the input electrical signal, the flow rate through the valve port can be precisely and continuously adjusted, thereby steplessly controlling the movement speed of the hydraulic cylinder 20 and realizing closed-loop control.

[0028] The hydraulic system 3 also includes a relief valve 34, the inlet of which is connected to the oil port branch of the hydraulic pump 31, and the outlet of which is connected to the hydraulic oil tank 30. The relief valve 34 provides overload protection.

[0029] The hydraulic pump 31 is driven by an electric motor, and a hydraulic lock and a shut-off valve are also provided between the proportional directional valve 32 and the hydraulic cylinder 20. The hydraulic lock and shut-off valve allow the hydraulic cylinder 20 to stop at any position within a specified stroke range and lock itself to maintain the working condition.

[0030] The controller is a PLC controller. The PLC controller model is Siemens S7-200 SMART. The PLC controller processes the signals from the stroke sensor, dual-axis tilt sensor, and pressure sensor, and transmits electrical signals to the proportional directional valve 32 to precisely control the extension and retraction of the hydraulic cylinder 20.

[0031] This utility model sets up a PLC controller to control the hydraulic system. First, it controls the four hydraulic cylinders 20 to retract synchronously, so that the first rotating leg 21 and the second rotating leg 22 rotate synchronously, the vertical leg 23 moves down, the support plate 24 contacts the ground, and the pressure sensor 25 transmits the pressure signal to the controller to confirm that all four sets of support leg systems 2 have touched the ground before proceeding with the adaptive leveling process.

[0032] The controller uses a PID algorithm to acquire the values ​​of the dual-axis tilt sensor 4 and the stroke sensor 33 in real time. The dual-axis tilt sensor 4, as a levelness detection element, acquires tilt angle data in two directions and transmits it to the controller via the CAN channel. The controller calculates the spatial coordinates of a certain support point on the chassis 1 of the work vehicle. When the vehicle platform tilts, the highest support point among the four sets is used as the reference and kept stationary. The other three sets of hydraulic cylinders 20 are shortened to level the support point towards the highest support point until the dual-axis tilt sensor 4 sends a feedback signal that the vehicle platform is level.

[0033] The stroke sensor 33 detects the extension and retraction of the hydraulic cylinder 20 in real time and transmits the signal to the controller. After receiving the signal, the controller performs calculations and outputs an electrical signal to control the proportional directional valve 32, thereby precisely and steplessly controlling the movement speed of the hydraulic cylinder 20; realizing dual closed-loop control and adaptive adjustment control.

[0034] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. An adaptive leveling system for the outriggers of an aerial work platform chassis, characterized in that, The system includes a work vehicle chassis (1), outrigger system (2), hydraulic system (3), dual-axis tilt sensor (4), and controller. The four outrigger systems (2) are respectively located at the four corners of the work vehicle chassis (1), and the dual-axis tilt sensor (4) is located at the center of the work vehicle chassis (1). The controller is electrically connected to the hydraulic system (3) and the dual-axis tilt sensor (4). The outrigger system (2) includes: a hydraulic cylinder (20), a first rotating outrigger (21), a second rotating outrigger (22), a vertical outrigger (23), and a support plate (24). The chassis (1) of the work vehicle is provided with several rotating seats at both ends. One end of the first rotating outrigger (21) is hinged to the upper rotating seat, and the other end is hinged to the piston rod of the hydraulic cylinder (20) and the top of the vertical outrigger (23). The second rotating outrigger (22) is arranged parallel to the first rotating outrigger (21), with one end hinged to the lower rotating seat and the other end hinged to the middle part of the vertical outrigger (23). The cylinder end of the hydraulic cylinder (20) is hinged between the lower rotating seats, and the bottom of the vertical outrigger (23) is hinged to the support plate (24).

2. The adaptive leveling system for the outriggers of an aerial work platform chassis according to claim 1, characterized in that, The support plate (24) has a sliding groove, a pressure sensor (25) is provided at the top of the sliding groove, a spring (26) is fixed at the upper end of the sliding groove, a slider (27) is fixedly installed at the lower end of the spring (26), and the pressure sensor (25) is electrically connected to the dual-axis tilt sensor (4).

3. The adaptive leveling system for the outriggers of an aerial work platform chassis according to claim 1, characterized in that, The hydraulic system (3) includes: a hydraulic oil tank (30), a hydraulic pump (31), and four sets of proportional directional valves (32). The hydraulic oil tank (30) is connected to the oil inlet of the hydraulic pump (31). The hydraulic pump (31) is connected to the oil inlet of the proportional directional valve (32) through an oil supply pipeline. The proportional directional valve (32) is connected to the hydraulic cylinder (20). A stroke sensor (33) is installed in the hydraulic cylinder (20). The hydraulic cylinder (20) is connected to the proportional directional valve (32) and the hydraulic oil tank (30) in sequence through a return oil pipeline.

4. The adaptive leveling system for the outriggers of an aerial work platform chassis according to claim 3, characterized in that, The hydraulic system (3) also includes a relief valve (34), the inlet of which is connected to the oil port branch of the hydraulic pump (31), and the outlet of which is connected to the hydraulic oil tank (30).

5. The adaptive leveling system for the outriggers of an aerial work platform chassis according to claim 4, characterized in that, The hydraulic pump (31) is driven by an electric motor, and a hydraulic lock and a shut-off valve are also provided between the proportional directional valve (32) and the hydraulic cylinder (20).

6. The adaptive leveling system for the outriggers of an aerial work platform chassis according to claim 1, characterized in that, The controller is a PLC controller.

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