Telescopic supporting device for underframe of aerial work vehicle

Abstract

The telescopic supporting device comprises two connecting plates, the two connecting plates are fixedly installed at the two ends of the overhead working truck respectively, adjusting assemblies are arranged at the two ends of each connecting plate, fixing columns are arranged below the adjusting assemblies, and the adjusting assemblies are used for adjusting the distance between the fixing columns and the ground. Each fixing column is ensured to abut against the ground through the adjusting assembly, at the moment, each fixing column plays a role in supporting the overhead working truck, and the supporting force borne by the overhead working truck is increased. The hydraulic aerial cage has the effect of improving the stability of the hydraulic aerial cage on the uneven ground.

Description

Technical Field

[0001] The present application relates to the technical field of aerial work vehicles, and in particular to a telescopic support device for an aerial work vehicle chassis. Background Art

[0002] An aerial work vehicle refers to a vehicle that is controlled by a hydraulic or electric system and has multiple hydraulic cylinders that can be lifted up and down to perform operations. As the operating height of aerial work vehicles continues to increase, the requirements for the stability of aerial work vehicles are becoming more and more stringent. The commonly used support method now is to directly support the four fixed columns of the aerial work vehicle against the ground, using the aerial work vehicle's own gravity to prevent sliding.

[0003] During use, the aerial work vehicle will stay in different ground environments. If it stays on uneven ground, the fixed columns on the aerial work vehicle will not be in contact with the ground and will be suspended in the air. The supporting force of the suspended fixed columns on the aerial work vehicle will disappear, the overall supporting force of the aerial work vehicle will be reduced, and the stability of the aerial work vehicle will be reduced, which is an obvious shortcoming. Utility Model Content

[0004] In order to improve the stability of an aerial work vehicle on uneven ground, the present application provides a retractable support device for an aerial work vehicle chassis.

[0005] The present application provides a retractable support device for an aerial work vehicle chassis using the following technical solution:

[0006] A telescopic support device for an aerial work vehicle chassis comprises two connecting plates, which are respectively fixedly mounted at both ends of the aerial work vehicle, and both ends of the connecting plates are provided with adjustment components, and a fixing column is provided under the adjustment component, and the adjustment component is used to adjust the distance between the fixing column and the ground.

[0007] By adopting the above technical solution, when the aerial work vehicle stays on an uneven bottom surface, the worker adjusts the distance between the bottom surface of each fixed column and the ground in turn through the adjustment component. When the bottom surfaces of all the fixed columns are in contact with the ground, the adjustment work is completed. At this time, each fixed column plays a supporting role for the aerial work vehicle, and the supporting force of the aerial work vehicle is increased, thereby improving the stability of the aerial work vehicle on uneven ground.

[0008] Optionally, the adjustment component includes a top plate arranged under the connecting plate, two relatively arranged movable plates are arranged under the top plate, a bottom plate is arranged under the movable plate, the bottom plate is arranged on the fixed column, multiple groups of support frames are arranged between the top plate and the bottom plate, the support frames are diamond-shaped, adjacent side edges of the support frames are hinged to each other, the top end of the support frame is hinged to the top plate, the bottom end of the support frame is hinged to the bottom plate, the opposite sides of the support frame are respectively hinged to the two movable plates, and a driving component for driving the two movable plates to move toward or away from each other is arranged under the connecting plate.

[0009] By adopting the above technical solution, when the fixed column is suspended in the air, the two movable plates are driven by the driving assembly to move in a direction close to each other. During the movement, the two movable plates gradually tend to be vertical with the support frames hinged to the movable plates, that is, the length of a diagonal line of the support frame becomes longer, and the support frame drives the bottom plate to move toward the ground, and the bottom plate drives the fixed column to move toward the ground. When the fixed column abuts against the bottom surface, the driving assembly is stopped.

[0010] Optionally, the driving assembly includes a bidirectional screw, and the two movable plates are respectively threadedly connected to the two end rods of the bidirectional screw with opposite thread rotation directions. A handwheel is provided at one end of the bidirectional screw, and the handwheel is fixedly connected to the bidirectional screw.

[0011] By adopting the above technical solution, under the action of the two-way screw rod, the two movable plates can only move in opposite directions. When the fixed column needs to be adjusted, the worker rotates the two-way screw rod forward, and the two movable plates move in the direction of approaching each other, the distance between the two movable plates becomes smaller, the diagonal length on the support frame becomes longer, and the bottom plate drives the fixed column to move toward the ground. When the aerial work is completed, the worker rotates the two-way screw rod in the opposite direction, the distance between the two movable plates becomes larger, the diagonal length on the support frame becomes shorter, and the bottom plate drives the fixed column to lift up and separate from the ground. At this time, the driving of the aerial work vehicle will not be interfered with by the fixed column.

[0012] Optionally, a limit block is provided at one end of the bidirectional lead screw away from the hand wheel.

[0013] By adopting the above technical solution, the setting of the limit block limits the movable plate, preventing the movable plate away from the handwheel from detaching from the bidirectional screw when the worker rotates the bidirectional screw in the opposite direction, thereby ensuring the normal operation of the adjustment component.

[0014] Optionally, a support platform is provided at the bottom end of the fixed column, and the support platform is cone-shaped and fixedly sleeved on the fixed column, and the end surface of the support platform with a large area abuts against the ground.

[0015] By adopting the above technical solution, the setting of the support platform expands the contact area between the fixed column and the ground, increases the supporting force of the ground on the fixed column, thereby increasing the supporting force of the fixed column on the aerial work vehicle, and further improving the stability of the aerial work vehicle.

[0016] Optionally, a plurality of counterweight blocks are provided inside the support platform.

[0017] By adopting the above technical solution, the setting of the counterweight block has a pressing effect on the end surface of the support platform with a large area, ensuring close contact between the end surface of the support platform and the ground, thereby further improving the stability of the aerial work vehicle.

[0018] Optionally, a plurality of anti-skid convex grooves are arranged on the bottom surface of the support platform, the cross-section of the anti-skid convex grooves is triangular, and the top angles of the anti-skid convex grooves touch the ground.

[0019] By adopting the above technical solution, the provision of anti-skid convex patterns increases the friction between the fixed column and the ground, reducing the possibility of the fixed column sliding when the ground is smooth, thereby further improving the stability of the aerial work vehicle.

[0020] Optionally, a pressure sensor is disposed on the bottom surface of each support platform, and a signal light corresponding to the pressure sensor is disposed on the outer surface of each fixing column, and the signal light is electrically connected to the pressure sensor.

[0021] By adopting the above technical solution, when the end surface of the support platform with a larger area contacts the ground, an interactive pressure is generated between the ground and the end surface of the support platform. After the pressure sensor detects the pressure, it transmits an electrical signal to the signal light. At this time, the signal light lights up, and the workers can observe whether the fixed column is in contact with the ground by the flashing state of the signal light, which is convenient for the workers to carry out leveling work.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. This application provides adjustment components and fixed columns. When the aerial work vehicle stops on an uneven ground, workers use the adjustment components to adjust the distance between the fixed columns and the ground, so that all the fixed columns can be stably supported on the ground, thereby improving the stability of the aerial work vehicle;

[0024] 2. The present application can better adapt to uneven ground by providing a support platform and anti-slip convex patterns, increase the friction between the support platform and the ground, prevent the support platform from sliding on the ground, and further improve the support stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of this application.

[0026] Figure 2It is a schematic diagram of the structure of the adjustment component in the embodiment of the present application.

[0027] Figure 3 It is a cross-sectional view of a fixing column in an embodiment of the present application.

[0028] Explanation of the accompanying drawings: 1. Connecting plate; 2. Adjusting assembly; 21. Top plate; 22. Moving plate; 23. Bottom plate; 24. Support frame; 3. Fixed column; 4. Driving assembly; 41. Bidirectional screw rod; 42. Handwheel; 5. Limiting block; 6. Support platform; 7. Counterweight block; 8. Anti-slip ridges; 9. Pressure sensor; 10. Signal light. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 This application is described in further detail.

[0030] The embodiment of the present application discloses a telescopic support device for an underframe of an aerial work vehicle.

[0031] Reference Figure 1 A telescopic support device for an aerial work vehicle chassis comprises two connecting plates 1, which are respectively arranged at both ends of the aerial work vehicle, and the bottom surfaces of the two connecting plates 1 are respectively fixedly mounted on the top surface of the aerial work vehicle frame by welding, and adjusting components 2 are arranged at both ends of the connecting plates 1, and a fixing column 3 is arranged under the adjusting component 2. The four fixing columns 3 are respectively distributed at the four end corners of the aerial work vehicle frame, and the adjusting component 2 is used to adjust the distance between the fixing column 3 and the ground.

[0032] Reference Figure 2 Specifically, the adjusting component 2 includes a top plate 21 arranged under the connecting plate 1, the top plate 21 is fixedly connected to the connecting plate 1 by welding, and two oppositely arranged movable plates 22 are arranged under the top plate 21, and the distribution direction of the two movable plates 22 is perpendicular to the length direction of the fixed column 3. The two movable plates 22 can move freely under the top plate 21, and a bottom plate 23 is arranged under the movable plate 22, and the bottom plate 23 is fixedly arranged on the fixed column 3 by welding. A plurality of groups of support frames 24 are arranged between the top plate 21 and the bottom plate 23. In this embodiment, the number of the support frames 24 is four groups, and the four groups of support frames 24 are distributed on both sides of the top plate 21 in pairs. The support frames 24 are rhombus-shaped, and the adjacent side edges of the support frames 24 are hinged to each other. The top end of the support frame 24 is hinged to the top plate 21, and the bottom end of the support frame 24 is hinged to the bottom plate 23. The opposite sides of the support frame 24 are respectively hinged to the two movable plates 22, and a driving component 4 for driving the two movable plates 22 to move toward or away from each other is arranged under the connecting plate 1.

[0033] When the aerial work vehicle stays on an uneven ground and the fixed column 3 appears to be suspended, the driving assembly 4 is started. Under the drive of the driving assembly 4, the two movable plates 22 move in a direction close to each other. During the movement, the two movable plates 22 gradually tend to be vertical with the support frame 24 hinged to the movable plates 22, that is, the length of a diagonal line of the support frame 24 becomes longer, and the support frame 24 drives the bottom plate 23 to move toward the ground, and the bottom plate 23 drives the fixed column 3 to move toward the ground. When the fixed column 3 abuts against the bottom surface, the driving assembly 4 is closed. At this time, the adjustment work is completed, each fixed column 3 abuts against the ground and supports the aerial work vehicle, and the supporting force on the aerial work vehicle is increased, thereby improving the stability of the aerial work vehicle on uneven ground.

[0034] Reference Figure 2 The driving assembly 4 includes a two-way screw rod 41, which is rotatably arranged between the top plate 21 and the bottom plate 23. The two-way screw rod 41 is horizontally arranged and passes through the two moving plates 22. The two moving plates 22 are respectively threadedly connected to the rod bodies at both ends of the two-way screw rod 41 with threads rotating in opposite directions. One end of the two-way screw rod 41 is provided with a hand wheel 42, and the hand wheel 42 is coaxially fixedly connected with the two-way screw rod 41. When the fixed column 3 needs to be adjusted, the worker rotates the hand wheel 42 forward, and the hand wheel 42 drives the two-way screw rod 41 to rotate. The two moving plates 22 move in a direction close to each other under the action of the two-way screw rod 41. When the aerial work is completed, the worker rotates the hand wheel 42 in the opposite direction, and the distance between the two moving plates 22 becomes larger, the diagonal length on the support frame 24 becomes shorter, and the bottom plate 23 drives the fixed column 3 to lift upward and separate from the ground. At this time, the driving of the aerial work vehicle will not be disturbed by the fixed column 3.

[0035] Reference Figure 2 and Figure 3 In order to prevent the movable plate 22 away from the hand wheel 42 from being separated from the bidirectional screw rod 41 when the worker rotates the hand wheel 42 in the reverse direction, the end of the bidirectional screw rod 41 away from the hand wheel 42 is fixedly connected to the limiting block 5 by welding. The setting of the limiting block 5 plays a limiting role on the movable plate 22.

[0036] Reference Figure 3 The bottom end of the fixed column 3 is fixedly connected to a support platform 6 by welding. The support platform 6 is conically sleeved on the fixed column 3. The cross-sectional area of ​​the end surface of the support platform 6 with a large area is larger than the cross-sectional area of ​​the fixed column 3. The end surface of the support platform 6 with a large area abuts against the ground. The setting of the support platform 6 expands the contact area between the fixed column 3 and the ground, increases the supporting force of the ground on the fixed column 3, and thus improves the stability of the aerial work vehicle.

[0037] Reference Figure 3A plurality of counterweight blocks 7 are arranged inside the support platform 6. The counterweight blocks 7 are arranged to press the end surface of the support platform 6 with a large area, thereby ensuring close contact between the end surface of the support platform 6 and the ground.

[0038] Reference Figure 3 The end surface of the support platform 6 with a large area is provided with a plurality of anti-skid ridges 8. The cross-section of the anti-skid ridges 8 is triangular. The top angles of the anti-skid ridges 8 touch the ground. The anti-skid ridges 8 can increase the friction between the support platform 6 and the ground to prevent the support platform 6 from sliding on the ground.

[0039] Reference Figure 3 A pressure sensor 9 is installed on the bottom surface of each support platform 6, and a signal light 10 corresponding to the pressure sensor 9 is arranged on the outer surface of each fixing column 3, and the signal light 10 is electrically connected to the corresponding pressure sensor 9.

[0040] When the end surface with a larger area of ​​the support platform 6 contacts the ground, an interactive pressure is generated between the ground and the end surface of the support platform 6. After the pressure sensor 9 detects the pressure, it transmits an electrical signal to the signal light 10. At this time, the signal light 10 lights up, and the workers can observe whether the fixed column 3 is in contact with the ground by the flashing state of the signal light 10, which is convenient for the workers to perform leveling work.

[0041] The implementation principle of a retractable support device for an aerial work vehicle underframe in an embodiment of the present application is as follows: when the aerial work vehicle stays on an uneven bottom surface, the worker turns the hand wheel 42, and under the drive of the hand wheel 42, the two movable plates 22 move in a direction close to each other. During the movement, the two movable plates 22 gradually tend to be vertical with the support frame 24 hinged to the movable plates 22, that is, the length of a diagonal line of the support frame 24 becomes longer, and the support frame 24 drives the bottom plate 23 to move toward the ground, and the bottom plate 23 drives the fixed column 3 to move toward the ground. When the signal light 10 is on, the support platform 6 abuts against the ground, and the adjustment work is completed at this time. Each fixed column 3 supports the aerial work vehicle, and the supporting force of the aerial work vehicle is increased, thereby improving the stability of the aerial work vehicle on uneven ground.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A telescopic support device for an aerial work vehicle chassis, characterized in that: The invention comprises two connecting plates (1), wherein the two connecting plates (1) are respectively fixedly mounted at two ends of an aerial work vehicle, and adjustment components (2) are arranged at both ends of the connecting plates (1). A fixing column (3) is arranged under the adjusting component (2), and the adjusting component (2) is used to adjust the distance between the fixing column (3) and the ground.

2. A telescopic support device for an aerial work vehicle chassis according to claim 1, characterized in that: The adjustment component (2) comprises a top plate (21) arranged under the connecting plate (1); two movable plates (22) arranged opposite to each other are arranged under the top plate (21); a bottom plate (23) is arranged under the movable plate (22); the bottom plate (23) is arranged on the fixed column (3); a plurality of support frames (24) are arranged between the top plate (21) and the bottom plate (23); the support frames (24) are in a rhombus shape; adjacent sides of the support frames (24) are hinged to each other; the top end of the support frame (24) is hinged to the top plate (21); the bottom end of the support frame (24) is hinged to the bottom plate (23); opposite sides of the support frame (24) are respectively hinged to the two movable plates (22); and a driving component (4) for driving the two movable plates (22) to move toward or away from each other is arranged under the connecting plate (1).

3. A telescopic support device for an aerial work vehicle underframe according to claim 2, characterized in that: The driving assembly (4) comprises a bidirectional screw rod (41), the two movable plates (22) are respectively threadedly connected to the two end rods of the bidirectional screw rod (41) with threads rotating in opposite directions, a hand wheel (42) is provided at one end of the bidirectional screw rod (41), and the hand wheel (42) is fixedly connected to the bidirectional screw rod (41).

4. A telescopic support device for an aerial work vehicle underframe according to claim 3, characterized in that: A limit block (5) is provided at one end of the bidirectional screw rod (41) away from the hand wheel (42).

5. The telescopic support device for the underframe of an aerial work vehicle according to claim 1, characterized in that: A support platform (6) is provided at the bottom end of the fixed column (3); the support platform (6) is fixedly sleeved on the fixed column (3) in a conical shape; the end surface of the support platform (6) with a large area abuts against the ground.

6. A telescopic support device for an aerial work vehicle underframe according to claim 5, characterized in that: A plurality of counterweight blocks (7) are arranged inside the support platform (6).

7. The telescopic support device for the underframe of an aerial work vehicle according to claim 5, characterized in that: The bottom surface of the support platform (6) is provided with a plurality of anti-skid convex patterns (8), the cross section of the anti-skid convex patterns (8) is triangular, and the top corners of the anti-skid convex patterns (8) touch the ground.

8. The telescopic support device for the underframe of an aerial work vehicle according to claim 5, characterized in that: A pressure sensor (9) is provided on the bottom surface of each support platform (6), and a signal light (10) corresponding to the pressure sensor (9) is provided on the outer surface of each fixing column (3), and the signal light (10) is electrically connected to the pressure sensor (9).

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