Pivot steering bridge expansion control and aerial work platform

Abstract

The invention discloses a pivot steering bridge expansion control and aerial work platform. The tires, the walking motors, the steering oil cylinders, the supporting legs and the bridge expanding oil cylinders are connected with one another. According to the invention, a hydraulic principle of steering and walking of the tire with four wheels acting independently is designed, a reversing control valve is designed on a hydraulic pipeline for walking and steering of each wheel, and the direction of the hydraulic pipeline is controlled by the valves, so that the action control of the walking and steering of the tire is realized; therefore, the functions of steering and axle expansion of the whole vehicle can be realized in situ.

Description

Technical Field

[0001] This invention relates to an in-situ turning bridge expansion control and aerial work platform. Background Technology

[0002] Aerial work platforms mainly consist of a work basket, boom, arm, turntable, chassis, hydraulic system, electrical and control system, and power system. The aerial work platform is powered by a diesel engine or battery, and its movement, including walking and boom extension / retraction, is achieved through the electrical and hydraulic systems. Currently, the steering process of aerial work platforms involves one pair of tires moving to the same side while simultaneously moving and steering. The current bridge-expanding process involves the vehicle moving slowly forward and backward without the tires turning; the outriggers are extended by the expansion cylinders. This process results in significant tire friction and wear. In summary, the disadvantages are: in existing technology, the front and rear pairs of tires turn synchronously and cannot be independently controlled; during bridge expansion, the outriggers are extended by the expansion cylinders, resulting in tire slippage and significant wear. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to provide an aerial work platform that enables the vehicle to perform steering and bridge widening functions on the spot through on-the-spot steering and on-the-spot steering bridge widening control, while reducing tire wear.

[0004] The technical solution of the present invention is as follows: The present invention provides an in-situ steering and bridge-expanding control and aerial work platform, which includes a steering and bridge-expanding structure. The steering and bridge-expanding structure includes an aerial work platform. Outriggers are installed at the four corners of one side of the aerial work platform. A steering cylinder is installed at one end of each outrigger. A travel motor is installed at one end of each steering cylinder. A tire is installed on the travel motor.

[0005] Furthermore, an expansion cylinder is installed between two adjacent support legs.

[0006] Furthermore, a directional control valve is installed on the hydraulic lines for both the walking and steering actions of each tire. The valve controls the direction of the hydraulic lines to achieve the movement control of the tire.

[0007] Furthermore, steering is achieved by extending and retracting the steering cylinder to rotate the tires to both sides.

[0008] Furthermore, the retraction and expansion of the outriggers are achieved by controlling the extension and retraction of the bridge-expanding cylinder.

[0009] Furthermore, the aerial work platform consists of a work basket, boom, arm, turntable, chassis, hydraulic system, electrical and control system, and power system.

[0010] Furthermore, the aerial work platform is also equipped with a diesel engine or battery.

[0011] Furthermore, the outriggers are movably mounted on the four corners of the aerial work platform by bolts.

[0012] Furthermore, the two ends of the bridge expansion cylinder are bolted to the middle position of the two side legs.

[0013] Furthermore, the two outriggers of the connecting expansion cylinder are oriented in the same direction.

[0014] Beneficial Effects: Compared with existing technologies, this invention has the following significant advantages: This invention enables the vehicle to turn and widen its axle while stationary, with almost no tire slippage friction and minimal wear. Specifically, this invention independently controls 18 actions, including steering, walking, and axle retraction / widening, and logically combines these actions to ultimately achieve four-wheel steering and axle retraction / widening while stationary. Because the vehicle can be operated while stationary, it occupies little space and can complete the actions within a small area. Furthermore, there is almost no slippage friction between the tires and the ground throughout the process, resulting in minimal tire wear. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the steering and bridge expansion structure of the present invention; Figure 2 This is a schematic diagram of the steering hydraulic system in this invention; Figure 3 This is a schematic diagram of the steering and bridge expansion hydraulic system in this invention; Among them, 1 is the tire, 2 is the travel motor, 3 is the steering cylinder, 4 is the outrigger, and 5 is the bridge expansion cylinder. Detailed Implementation

[0016] The specific technical solution of the present invention will be further described in detail below with reference to specific examples.

[0017] As shown in the figure, the present invention discloses a stationary steering and bridge widening control and aerial work platform, which is designed with a hydraulic principle of independent four-wheel action tire 1 steering and walking. Each wheel's walking and steering hydraulic line is designed with a reversing control valve. By controlling the direction of the hydraulic line through the valve, the walking and steering actions of the tire 1 are controlled, thereby enabling the vehicle to achieve steering and bridge widening functions in place, reducing the space occupied by the vehicle operation and reducing tire wear. The steering and axle expansion structure of the present invention consists of the following main components: tire 1, travel motor 2, steering cylinder 3, outrigger 4, and axle expansion cylinder 5; Steering is achieved by controlling the extension and retraction of the steering cylinder 3 to make the tire 1 rotate to both sides, and steering is achieved by controlling the extension and retraction of the bridge expansion cylinder 5 to make the outrigger 4 retract and expand.

[0018] The hydraulic principle of this invention is as follows: Figure 2 As shown: In the steering control principle, the oil pump sends hydraulic oil to the steering valve group control pipeline, which controls the opening and closing of solenoid valves Y20, Y21, Y22, and Y23 to achieve the rotation direction control of the four tires 1. In the walking control principle, the oil pump sends hydraulic oil to the walking valve group control pipeline, which controls the opening and closing of solenoid valves Y24, Y25, Y26, and Y27 to realize the forward and reverse walking control of the four tires 1.

[0019] In this invention, the control logic for steering, driving, and axle retraction / expansion is shown in the table below; by controlling the combined action of the solenoid valves, four-wheel steering and axle retraction / expansion actions can be achieved in place.

[0020] This invention independently controls 18 actions, including steering, walking, and axle retraction and expansion, and designs logical combinations for each action, ultimately realizing four-wheel steering and axle retraction and expansion on the spot. Because the vehicle can be operated on the spot, it occupies little space and can complete the action in a small space. Furthermore, there is almost no sliding friction between tire 1 and the ground during the entire process, resulting in minimal wear on tire 1.

[0021] This invention sets up control valves to independently control the hydraulic lines for 18 actions, including steering, traveling, and retracting / expanding the axle, and designs a control program to realize the logical combination of each action.

Claims

1. A platform for in-situ steering and bridge widening control, comprising a steering and bridge widening structure, characterized in that, The steering and bridge expansion structure includes an aerial work platform, with outriggers (4) installed at the four corners of one side of the aerial work platform. A steering cylinder (3) is installed at one end of each outrigger (4), and a travel motor (2) is installed at one end of each steering cylinder (3). A tire (1) is installed on the travel motor (2).

2. The in-situ turning bridge widening control and high-altitude work platform according to claim 1, characterized in that, An expansion cylinder (5) is installed between two adjacent support legs (4).

3. The in-situ turning bridge widening control and high-altitude work platform according to claim 1, characterized in that, A reversing control valve is installed on the hydraulic line for the walking and steering actions of each tire (1). The movement and steering actions of the tire (1) are controlled by controlling the direction of the hydraulic line through the valve.

4. The in-situ turning bridge widening control and high-altitude work platform according to claim 1, characterized in that, Steering is achieved by extending and retracting the steering cylinder (3) to rotate the tire (1) to both sides.

5. The in-situ turning bridge widening control and aerial work platform according to claim 2, characterized in that, The extension and retraction of the outrigger (4) are achieved by controlling the extension and retraction of the bridge expansion cylinder (5).

6. The in-situ turning bridge widening control and aerial work platform according to claim 1, characterized in that, The aerial work platform consists of a work basket, boom, arm, turntable, chassis, hydraulic system, electrical and control system, and power system.

7. The in-situ turning bridge widening control and high-altitude work platform according to claim 6, characterized in that, The aerial work platform is also equipped with a diesel engine or battery.

8. The in-situ turning bridge widening control and aerial work platform according to claim 1, characterized in that, The outriggers (4) are movably mounted on the four corners of the aerial work platform by bolts.

9. The in-situ turning bridge widening control and high-altitude work platform according to claim 2, characterized in that, The two ends of the bridge expansion cylinder (5) are bolted to the middle position of the two side legs (4).

10. The in-situ turning bridge widening control and high-altitude work platform according to claim 9, characterized in that, The two legs (4) of the connecting expansion cylinder (5) are oriented in the same direction.

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