Double-acting ladder structure and aerial work platform

Abstract

The present invention belongs to the technical field of climbing ladders, and discloses a double-acting climbing ladder structure and an aerial work vehicle. The double-acting climbing ladder structure includes a mounting frame and a rotating body. The mounting frame is arranged on the aerial work vehicle, and a ladder entrance is provided on one side; the rotating body has a climbing ladder state and a protection state relative to the mounting frame. The rotating body includes a main frame body, a foot ladder and a guardrail. The foot ladder and the guardrail are both arranged on the main frame body, and the main frame body is rotatably arranged on the mounting frame. When the main frame body rotates to the climbing ladder state, the foot surface of the foot ladder faces upward, and the main frame body drives the guardrail to rotate to the lower side of the mounting frame to avoid the ladder entrance; when the main frame body rotates to the protection state, the main frame body drives the guardrail to rotate to one side of the mounting frame to block the ladder entrance. For this double-acting climbing ladder structure, the rotating body has two states relative to the mounting frame, so that when in the climbing ladder state, the staff can board the vehicle through the ladder entrance, and when in the protection state, the guardrail can block the ladder entrance.

Description

Technical Field

[0001] The present invention relates to the technical field of climbing ladders, and particularly to a dual-action climbing ladder structure and an aerial work platform vehicle. Background Art

[0002] It is a common way for workers to board an aerial work platform vehicle through a climbing ladder provided on the vehicle. In the prior art, the climbing ladder is fixedly arranged on the vehicle body of the aerial work platform vehicle, and its installation position and structural form are fixed. After the worker boards the vehicle through the climbing ladder, there is no protection at the ladder entrance. This structure not only affects the appearance but also increases the safety of the aerial work platform vehicle during driving. Summary of the Invention

[0003] The purpose of the present invention is to provide a dual-action climbing ladder structure and an aerial work platform vehicle, so that the aerial work platform vehicle has a climbing ladder state and a protection state during work and driving respectively. In the climbing ladder state, it is convenient for workers to board or get off the vehicle, and in the protection state, it can improve safety and aesthetics.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] The dual-action climbing ladder structure includes:

[0006] An installation frame;

[0007] A rotating body, the rotating body has a climbing ladder state and a protection state relative to the installation frame. The rotating body includes a main frame body, a foot ladder, and a guardrail. The foot ladder and the guardrail are respectively arranged on both sides of the main frame body. The main frame body is rotatably arranged on the installation frame to switch the relative positions of the foot ladder, the guardrail and the installation frame, so as to realize the conversion between the climbing ladder state and the protection state.

[0008] Preferably, the guardrail includes a plurality of guard plates, the foot ladder includes a plurality of foot plates, the plurality of guard plates are arranged at intervals on one side of the main frame body, the plurality of foot plates are arranged in a stepped shape on the other side of the main frame body, and the guard plates and the foot surfaces of the foot plates are parallel.

[0009] Preferably, two connecting plates are arranged at intervals on the main frame body. One foot plate and one guard plate are both connected to the two connecting plates. When the rotating body is in the climbing ladder state, the foot plate located on the two connecting plates is lower than the bottom end of the installation frame. When the rotating body is in the protection state, the guard plate located on the two connecting plates is higher than the top end of the installation frame.

[0010] Preferably, a connecting shaft is arranged on the installation frame, and the main frame body is rotatably connected to the connecting shaft.

[0011] Preferably, the connecting shaft penetrates through one end of the main frame body away from the connecting plate.

[0012] Preferably, a clamping plate is arranged on the mounting frame, and a clamping component is arranged on the main frame body. When the rotating body is in the protection state, the clamping plate is clamped in the clamping component.

[0013] Preferably, the clamping component includes a fixed seat, a moving part and a fixing part. The fixed seat and the fixing part are arranged on the main frame body. The moving part can move on the fixed seat to approach or move away from the fixing part. When the rotating body is in the protection state, the moving part can approach the fixing part, and the clamping plate is clamped between the moving part and the fixing part. When the rotating body is in the ladder climbing state, the moving part can move away from the fixing part so that the clamping plate can be separated from the moving part and the fixing part.

[0014] Preferably, a sliding groove is arranged on the moving part, a compression spring is arranged in the sliding groove, a bolt is arranged on the fixed seat, the bolt penetrates through the sliding groove, and two ends of the compression spring respectively abut against the bolt and the inner wall of the sliding groove. The compression spring can make the moving part approach the fixing part.

[0015] Preferably, an inclined surface is arranged at one end of the moving part facing the fixing part. During the process of the rotating body changing from the ladder climbing state to the protection state, the clamping plate abuts against the inclined surface to push the moving part to move away from the fixing part against the acting force of the compression spring.

[0016] An aerial work platform includes the dual-action ladder structure described in any of the above solutions.

[0017] Advantages of the present invention:

[0018] The present invention provides a double-acting ladder structure, which is applied to aerial work vehicles. The double-acting ladder structure includes a mounting frame and a rotating body. The mounting frame is arranged on the aerial work vehicle, and a ladder opening is arranged on the side away from the aerial work vehicle; the rotating body has a ladder climbing state and a protection state relative to the mounting frame, and the rotating body includes a main frame, a foot ladder and a guardrail. The foot ladder and the guardrail are both arranged on the main frame, and the main frame is rotatably arranged on the mounting frame. When the main frame rotates to the ladder climbing state, the foot ladder faces upward, and the main frame drives the guardrail to rotate to the lower side of the mounting frame to avoid the ladder opening, so as to facilitate the staff to board the vehicle; when the main frame rotates to the protection state, the main frame drives the guardrail to rotate to one side of the mounting frame to block the ladder opening. The rotating body in the double-acting ladder structure has two states relative to the mounting frame, so that in the climbing state, the staff can get on the vehicle through the ladder opening, and in the protection state, the guardrail can block the ladder opening. The guardrail can not only improve the aesthetics of the entire vehicle, but also improve the safety during driving. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the installation of the double-acting ladder structure and the vehicle body according to an embodiment of the present invention;

[0020] Figure 2 is a schematic diagram of a rotating body in a double-acting ladder structure according to an embodiment of the present invention being in a protective state relative to a mounting frame;

[0021] Figure 3 It is a schematic diagram of a double-acting ladder structure according to an embodiment of the present invention, in which a rotating body is in a ladder climbing state relative to a mounting frame;

[0022] Figure 4 is a schematic structural diagram of a rotating body according to an embodiment of the present invention;

[0023] Figure 5 is a schematic structural diagram of a mounting frame according to an embodiment of the present invention;

[0024] Figure 6 yes Figure 5 A magnified view of the structure at center A;

[0025] Figure 7 yes Figure 4 A magnified view of the structure at B in the middle;

[0026] Figure 8 is a structural schematic diagram of a clamping assembly according to an embodiment of the present invention;

[0027] Figure 9 It is a schematic diagram of the structure of the moving part described in the embodiment of the present invention.

[0028] In the figure:

[0029] 100. Vehicle body;

[0030] 1. Mounting bracket; 11. Connecting shaft; 111. Pin; 12. Clamping plate; 13. Shift lever; 14. Spacer

[0031] 2. Rotating body; 21. Main frame body; 211. Connecting plate; 212. Gantry; 213. Step frame; 22. Foot ladder; 221. Footrest; 23. Guardrail; 231. Guard plate; 24. Clamping assembly; 241. Fixed seat; 2411. Base; 2412. Upper cover; 242. Moving part; 2421. Slide groove; 2422. Inclined surface; 243. Fixing part; 244. Compression spring; 245. Bolt Detailed implementation mode

[0032] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] In the description of the present invention, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It may be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the description of the present invention, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature not being in direct contact but being in contact through other features between them. Moreover, the first feature being "above", "over" and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "under" and "beneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0035] The technical solutions of the present invention will be further described below with reference to the accompanying drawings and through specific implementation modes.

[0036] As Figures 1 - 4As shown, an embodiment of the present invention provides a double-acting ladder structure, which is arranged on an aerial work vehicle. The double-acting ladder structure includes a mounting frame 1 and a rotating body 2. The mounting frame 1 is fixedly arranged on the middle part of the right side of the body 100 of the aerial work vehicle, and the mounting frame 1 has a ladder opening on the side away from the body 100; the rotating body 2 can rotate on the mounting frame 1, and has a ladder state and a protection state relative to the mounting frame 1; when the staff needs to get on or off the vehicle, the rotating body 2 rotates relative to the mounting frame 1 to the ladder state, and the staff gets on or off the vehicle through the rotating body 2; after the staff gets on the vehicle, the rotating body 2 rotates relative to the mounting frame 1 to the protection state, so that the rotating body 2 blocks the ladder opening. The double-acting ladder structure can convert the rotating body 2 to the ladder state when the aerial work vehicle is working, and the staff can quickly complete the conversion of getting on or off the vehicle and the turntable operation; when the aerial work vehicle is driving, the rotating body 2 is converted to the protection state to block the ladder opening, thereby improving the overall aesthetics and driving safety.

[0037] Continue to refer to Figure 4 The rotating body 2 includes a main frame 21, a step ladder 22 and a guardrail 23. The main frame 21 is rotatably arranged on the mounting frame 1, and the foot ladder 22 and the guardrail 23 are both arranged on both sides of the main frame 21; when the rotating body 2 is converted from the protection state to the ladder state relative to the mounting frame 1, the main frame 21 rotates on the mounting frame 1 and drives the foot ladder 22 and the guardrail 23 to rotate, so that the foot step surface of the foot ladder 22 faces upward, and the guardrail 23 is rotated to the lower side of the mounting frame 1 to avoid the ladder opening, and the staff uses the foot ladder 22 to get on or off the vehicle; when the rotating body 2 is converted from the ladder state to the protection state relative to the mounting frame 1, the main frame 21 rotates in the opposite direction on the mounting frame 1 and drives the guardrail 23 to rotate to one side of the mounting frame 1 to block the ladder opening to ensure the safety of driving. Since the body 100 of the aerial work vehicle is provided with the mounting frame 1, the protective structure of the body 100 is partially missing, and the guardrail 23 can be integrated with the protective structure of the body 100, thereby improving the overall aesthetics of the aerial work vehicle.

[0038] In the double-acting ladder structure, the rotating body 2 has two states relative to the mounting frame 1, so that in the climbing state, the staff can get on the vehicle through the ladder opening, and in the protection state, the guardrail 23 can block the ladder opening. The guardrail 23 can not only improve the aesthetics of the whole vehicle, but also improve the safety during driving; and the double-acting ladder structure is stronger and less prone to deformation.

[0039] The main frame 21 includes a gantry frame 212 and a ladder frame 213. The guardrail 23 is arranged on one side of the gantry frame 212, the ladder frame 213 is arranged on the other side of the gantry frame 212, and the step ladder 22 is arranged on the ladder frame 213. The gantry frame 212 and the ladder frame 213 are welded and fixed to each other.

[0040] Specifically, the guardrail 23 includes a plurality of guard plates 231, and the plurality of guard plates 231 are spaced apart and arranged on the gantry 212. The foot ladder 22 includes a plurality of foot plates 221, and the plurality of foot plates 221 are spaced apart and arranged on the steps of the ladder frame 213, and the guard plates 231 are arranged parallel to the tread surfaces of the foot plates 221. The structural design is simple and convenient to use. The rotation angle of the main frame body 21 relative to the mounting frame 1 is not greater than 90°, and the conversion between the ladder state and the protection state can be realized.

[0041] Since the outriggers will be raised for support during the operation of the aerial work vehicle, the overall height of the vehicle increases. To facilitate the staff to board or alight from the vehicle, further, two connecting plates 211 arranged at intervals are welded on the main frame body 21, and one foot plate 221 and one guard plate 231 are welded on the two connecting plates 211. The foot plate 221 and the guard plate 231 are arranged in parallel. When the rotating body 2 is in the ladder state, the two connecting plates 211 protrude from the bottom end of the mounting frame 1, so that the foot plate 221 located on the two connecting plates 211 is lower than the bottom end of the mounting frame 1, avoiding the foot plate 221 being too high from the ground and being inconvenient to board or alight, which conforms to ergonomics and increases comfort; and when the rotating body 2 is in the protection state, the two connecting plates 211 protrude from the top end of the mounting frame 1, so that the guard plate 231 located on the two connecting plates 211 is higher than the top end of the mounting frame 1, making the safety higher.

[0042] As Figure 5 shown, the mounting frame 1 includes two side brackets, and the two side brackets are spaced apart to form a ladder entrance. The two side brackets are respectively fixedly connected to the vehicle body 100, and a crossbar 13 is welded between the two side brackets. The main frame body 21 is rotatably arranged between the two side brackets, and when the rotating body 2 is in the ladder state, the main frame body 21 abuts against the crossbar 13 after rotating in place to limit the excessive rotation of the main frame body 21.

[0043] As Figures 4 - 6 shown, a connecting shaft 11 is arranged on the mounting frame 1, and the main frame body 21 is rotatably connected to the connecting shaft 11. In this structure, the main frame body 21 is clamped between the two side brackets, and the connecting shaft 11 passes through the main frame body 21 and the two side brackets at the same time, so that the main frame body 21 can rotate relative to the mounting frame 1. The structure is simple and the cost is low.

[0044] Furthermore, in order to prevent the connecting shaft 11 from disengaging from the mounting frame 1, referring to Figure 6 , retaining pins 111 are respectively arranged at both ends of the connecting shaft 11 to limit the axial movement of the connecting shaft 11.

[0045] There are also two gaskets 14 provided on the connecting shaft 11. One gasket 14 is located between one side bracket and the main frame body 21, and the other gasket 14 is located between the other side bracket and the main frame body 21. The two gaskets 14 are used to make up for the gap between the mounting frame 1 and the main frame body 21 to prevent the main frame body 21 from shaking along the axial direction of the connecting shaft 11.

[0046] Preferably, the connecting shaft 11 penetrates through one end of the main frame body 21 away from the connecting plate 211. In this structure, the relative rotation of the main frame body 21 with respect to the mounting frame 1 adopts an eccentric design, so that when the main frame body 21 rotates to the ladder state, the center of gravity is far from the connecting shaft 11, so that the main frame body 21 always has a downward turning force, improving stability and safety.

[0047] Refer to Figure 2 、 Figure 5 and Figures 7 - 9 As well as

[0048] On the mounting frame 1, there is a clamping plate 12 provided, and on the main frame body 21, there is a clamping assembly 24 provided. When the rotating body 2 is in the protection state, the main frame body 21 drives the clamping assembly 24 to move towards the clamping plate 12, so that the clamping plate 12 is clamped inside the clamping assembly 24. In this structure, the main frame body 21 and the mounting frame 1 are clamped by the clamping plate 12 and the clamping assembly 24 to prevent the main frame body 21 from automatically converting to the ladder state due to gravity when in the protection state.

[0049] The clamping assembly 24 includes a fixed seat 241, a moving member 242 and a fixing member 243. Among them, the fixed seat 241 is fixedly arranged on the main frame body 21, the fixing member 243 is arranged on the main frame body 21 and is arranged near the end of the fixed seat 241. The moving member 242 can move on the fixed seat 241 close to or away from the fixing member 243. When the rotating body 2 is in the protection state, the moving member 242 approaches the fixing member 243. The clamping plate 12 is an L-shaped plate. The first side plate of the clamping plate 12 is welded to the mounting frame 1, and the second side plate of the clamping plate 12 can be inserted between the moving member 242 and the fixing member 243. When the rotating body 2 is converted from the protection state to the ladder state, the moving member 242 can move away from the fixing member 243 so that the second side plate of the clamping plate 12 is disengaged from the restriction of the moving member 242 and the fixing member 243, and then the main frame body 21 can rotate relative to the mounting frame 1. It can be understood that when the rotating body 2 is converted from the protection state to the ladder state, the staff needs to manually push the moving member 242 to move away from the fixing member 243 to achieve the disengagement of the clamping plate 12 from the restriction of the moving member 242 and the fixing member 243. When the aerial work vehicle is driving, the fixing member 243 can always restrict the rotation of the main frame body 21 towards the direction of the vehicle body 100.

[0049] The fixed seat 241 includes a base 2411 and an upper cover 2412. The moving member 242 is slidably arranged in the U-shaped groove of the base 2411, and the upper cover 2412 covers the base 2411 to close the notch of the U-shaped groove.

[0050] In this embodiment, the moving member 242, the fixed member 243, and the clamping plate 12 are arranged in one-to-one correspondence, and there are two of each. The moving members 242 are respectively slidably arranged at both ends of the base 2411. The two clamping plates 12 are symmetrically arranged and can be respectively clamped between the moving member 242 and the fixed member 243 at both ends of the base 2411. This structure makes the limit of the main frame body 21 more firm.

[0051] A chute 2421 is arranged on the moving member 242, and a compression spring 244 is arranged in the chute 2421. After the upper cover and the base 2411 are buckled, they are fixedly connected by bolts 245. The bolts 245 penetrate through the chute 2421. Both ends of the compression spring 244 respectively abut against the bolt 245 and the inner wall of the chute 2421. The compression spring 244 makes the moving member 242 have a force to move towards the fixed member 243. This structure makes the connection between the clamping plate 12 and the clamping assembly 24 more firm when the rotating body 2 is in the protective state. And before the clamping plate 12 is clamped between the moving member 242 and the fixed member 243, the clamping plate 12 pushes the moving member 242 to move away from the fixed member 243 against the force of the compression spring 244. After the second side plate of the clamping plate 12 rotates in place, the moving member 242 automatically moves towards the fixed member 243 under the action of the compression spring 244 to limit the clamping plate 12.

[0052] In order to more conveniently drive the moving member 242 to move away from the fixed member 243, an inclined surface 2422 is arranged at one end of the moving member 242 facing the fixed member 243. When the rotating body 2 changes from the ladder state to the protective state, the main frame body 21 drives the clamping assembly 24 to move towards the clamping plate 12. The inclined surface 2422 abuts against the second side plate of the clamping plate 12. The second side plate presses against the inclined surface 2422 to push the moving member 242 to move away from the fixed member 243 against the force of the compression spring 244. When the second side plate of the clamping plate 12 rotates in place relative to the moving member 242 and disengages from the inclined surface 2422, the moving member 242 returns under the action of the compression spring 244 so that the second side plate of the clamping plate 12 is limited between the fixed member 243 and the moving member 242.

[0053] The embodiment of the present invention also provides an aerial work vehicle, which applies the above-mentioned double-action ladder structure, enabling the aerial work vehicle to facilitate the boarding and alighting of workers during operation, and improving the aesthetics and safety of the whole vehicle when the aerial work vehicle is driving.

[0054] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. Double-acting ladder structure, characterized in that, it includes: mounting frame (1); rotating body (2), the rotating body (2) has a ladder state and a protection state relative to the mounting frame (1), the rotating body (2) includes a main frame body (21), a foot ladder (22) and a guardrail (23), the foot ladder (22) and the guardrail (23) are respectively arranged on both sides of the main frame body (21), the main frame body (21) is rotatably arranged on the mounting frame (1) to switch the relative positions of the foot ladder (22), the guardrail (23) and the mounting frame (1), so as to realize the conversion between the ladder state and the protection state; the guardrail (23) includes a plurality of guard plates (231), the foot ladder (22) includes a plurality of foot plates (221), the plurality of guard plates (231) are arranged at intervals on one side of the main frame body (21), the plurality of foot plates (221) are arranged in a stepped shape on the other side of the main frame body (21), and the tread surfaces of the guard plates (231) and the foot plates (221) are parallel; two connecting plates (211) are arranged at intervals on the main frame body (21), one foot plate (221) and one guard plate (231) are both connected to the two connecting plates (211), when the rotating body (2) is in the ladder state, the foot plate (221) located on the two connecting plates (211) is lower than the bottom end of the mounting frame (1), when the rotating body (2) is in the protection state, the guard plate (231) located on the two connecting plates (211) is higher than the top end of the mounting frame (1).

2. The double-acting ladder structure according to claim 1, characterized in that, a connecting shaft (11) is arranged on the mounting frame (1), and the main frame body (21) is rotatably connected to the connecting shaft (11).

3. The double-acting ladder structure according to claim 2, characterized in that, the connecting shaft (11) penetrates through one end of the main frame body (21) away from the connecting plate (211).

4. The double-acting ladder structure according to claim 1, characterized in that, a clamping plate (12) is arranged on the mounting frame (1), and a clamping component (24) is arranged on the main frame body (21), when the rotating body (2) is in the protection state, the clamping plate (12) is clamped in the clamping component (24).

5. The double-acting ladder structure according to claim 4, characterized in that, The clamping component (24) includes a fixed seat (241), a moving member (242), and a fixing member (243). The fixed seat (241) and the fixing member (243) are arranged on the main frame body (21). The moving member (242) can move on the fixed seat (241) to approach or move away from the fixing member (243). When the rotating body (2) is in the protection state, the moving member (242) can approach the fixing member (243), and the clamping plate (12) is clamped between the moving member (242) and the fixing member (243). When the rotating body (2) is in the ladder state, the moving member (242) can move away from the fixing member (243) so that the clamping plate (12) can be disengaged from the moving member (242) and the fixing member (243).

6. The double-acting ladder structure according to claim 5, wherein, a chute (2421) is arranged on the moving member (242), a compression spring (244) is arranged in the chute (2421), a bolt (245) is arranged on the fixed seat (241), the bolt (245) penetrates through the chute (2421), and two ends of the compression spring (244) respectively abut against the bolt (245) and the inner wall of the chute (2421). The compression spring (244) can make the moving member (242) approach the fixing member (243).

7. The double-acting ladder structure according to claim 6, wherein, an inclined surface (2422) is arranged at one end of the moving member (242) facing the fixing member (243). During the process of the rotating body (2) changing from the ladder state to the protection state, the clamping plate (12) abuts against the inclined surface (2422) to push the moving member (242) to move away from the fixing member (243) against the acting force of the compression spring (244).

8. An aerial work platform, wherein, it includes the double-acting ladder structure according to any one of claims 1-7.

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