Active pit protection mechanism for aerial work platform

Abstract

The utility model relates to an active pit protection mechanism of an aerial work platform. The technical problem that an existing pothole protection device is high in maintenance cost is solved. Comprising a fork frame chassis, a fork frame capable of ascending and descending is movably arranged at the upper end of the fork frame chassis, a pit hole protection plate is movably arranged at the bottom of the fork frame chassis, and a top shaft assembly corresponding to the fork frame is arranged on the outer side of the fork frame chassis. An eccentric pressing block is arranged between the top shaft assembly and the pit hole protection plate, wherein the eccentric pressing block can enable the pit hole protection plate to be folded at the bottom of the fork frame chassis when the fork frame abuts against the top shaft assembly, and can enable the pit hole protection plate to be unfolded on the outer side of the fork frame chassis under the action of the eccentric pressing block when the fork frame is separated from the top shaft assembly. The device has the advantages that the eccentric pressing block can conveniently control the pit protection plate through the pressing block balancing weight and the connecting rod, the structure is simple, and the maintenance cost is reduced. And the limiting part can play a role in limiting the eccentric pressing block, so that the locking effect of the pit hole protection plate is ensured, and the aerial operation safety is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of aerial work platform equipment, and in particular relates to an active pothole protection mechanism for an aerial work platform. Background Art

[0002] Aerial work platforms are flexible in movement and fast in lifting, and are widely used in aerial work in the fields of construction, municipal engineering, etc. Aerial work platforms are mainly composed of a fuselage, a walking device, a lifting device, and a work platform. When the aerial work platform is in a high-position working state, the center of the aerial work platform is relatively high, and when there are potholes on the ground, it is easy to cause the aerial work platform to tip over, affecting the user's work safety. At present, in order to ensure the user's work safety, most aerial work platforms are equipped with pothole protection devices, which can effectively protect users when working at high altitudes. However, the existing pothole protection device has an overly complex structure, is prone to failure in long-term use, and has low maintenance efficiency and high maintenance costs.

[0003] In order to solve the deficiencies of the existing technology, people have conducted long-term exploration and proposed various solutions. For example, a Chinese patent document discloses a pothole protection device for an aerial work platform [202120954042.4], which includes a connecting rod transmission mechanism and a protective plate. The connecting rod transmission mechanism includes an elastic device, a rotating device and a connecting rod. The rotating device is installed on the side wall of the aerial work platform body. The connecting rod and the elastic device are respectively arranged on the inner and outer sides of the side wall of the body. The elastic device is suitable for rising or falling under the action of its own elastic force and the internal driving parts of the body. The bottom of the elastic device is suitable for cooperating with the rotating device to drive the rotating device to rotate. The rotating device is hinged to the connecting rod, the connecting rod is hinged to the protective plate, and the protective plate is hinged to the body.

[0004] The above solution has solved the problem of low existing maintenance efficiency to a certain extent, but the solution still has many shortcomings. For example, it supports the protective plate by gas springs to ensure the protective stability of the protective plate. The gas springs need to be maintained and replaced under long-term use, and the maintenance cost is high. Summary of the invention

[0005] The utility model aims to solve the above problems and provides an active pothole protection mechanism for an aerial work platform.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical solutions: an active pothole protection mechanism for an aerial work platform, comprising a fork frame chassis, a fork frame that can be lifted up and down is movably provided on the upper end of the fork frame chassis, a pothole protection plate is movably provided at the bottom of the fork frame chassis, a top shaft assembly corresponding to the fork frame is provided on the outer side of the fork frame chassis, an eccentric pressure block is provided between the top shaft assembly and the pothole protection plate, which can make the pothole protection plate retract to the bottom of the fork frame chassis when the fork frame abuts against the top shaft assembly, and can make the pothole protection plate expand outside the fork frame chassis under its own action when the fork frame is separated from the top shaft assembly, and the eccentric pressure block can be driven by the top shaft assembly The pothole protection plate is controlled, and when the fork frame is raised, the eccentric pressure block and the pothole protection plate are automatically reset, and the pothole protection plate is automatically reset to the side of the fork frame chassis, reducing the ground clearance between the fork frame chassis and the ground, and when encountering a bumpy road surface, it can play a good supporting effect to ensure the stability of the fork frame chassis; and when the fork frame is retracted, the fork frame drives the top shaft assembly to move downward, and one end of the top shaft assembly abuts against the eccentric pressure block, and drives one end of the eccentric pressure block to move downward, and the other end of the eccentric pressure block is lifted upward to drive the pothole protection plate to be retracted, thereby increasing the ground clearance between the fork frame chassis and the ground and ensuring the passability of the fork frame chassis.

[0007] In the above-mentioned active pothole protection mechanism of an aerial work platform, the pothole protection plate is in the shape of a long strip, and the pothole protection plate is movably arranged on the bottom side of the fork frame chassis through a protection plate hinged mounting structure, and the pothole protection plate is extended along the axial length direction of the fork frame chassis, and a protection plate placement groove for placing the pothole protection plate is provided at the bottom of the fork frame chassis. The protection plate placement groove can facilitate the placement of the pothole protection plate in the fork frame chassis when it is folded, which can play a protective role for the pothole protection plate, and the protection plate hinged mounting structure can make the pothole protection plate fixedly connected to the fork frame chassis, thereby ensuring the protective effect of the pothole protection plate on the fork frame chassis.

[0008] In the above-mentioned active pothole protection mechanism for an aerial work platform, the protection plate hinged mounting structure includes protection plate hinge seats respectively arranged at both ends of the pothole protection plate, and the ends of the protection plate hinge seats away from the pothole protection plate are hingedly connected to the bottom sides of the fork frame chassis through protection plate hinge shafts. The pothole protection plate can be rotatably set through the protection plate hinge shaft, and the protection plate hinge seat can ensure a fixed connection with the fork frame chassis.

[0009] In the above-mentioned active pothole protection mechanism for an aerial work platform, the top shaft assembly and the eccentric pressure block are respectively movably arranged on the outer side of one axial end of the fork frame chassis, and the eccentric pressure block is hingedly linked to the pothole protection plate. The top shaft assembly can drive one end of the eccentric pressure block to move downward, and the up and down movement of the end of the eccentric pressure block can enable the pothole protection plate to change into different usage states, so that the switch structure of the pothole protection plate is simpler and the maintenance cost is lower.

[0010] In the above-mentioned active pothole protection mechanism for an aerial work platform, the eccentric pressure block includes two symmetrically arranged pressure block plates, and the pressure block plates are connected by a pressure block counterweight block. The pressure block counterweight block can increase its own weight and ensure the self-resetting effect of the eccentric pressure block.

[0011] In the above-mentioned active pothole protection mechanism for an aerial work platform, the eccentric pressure block has a free end at one end and a connecting end at the other end. The connecting end of the eccentric pressure block is hingedly connected to a protection plate hinge seat at one end of the pothole protection plate through a connecting rod. When the connecting end of the eccentric pressure block is raised, the pothole protection plate can be driven to be set in the protection plate placement groove through the connecting rod, and the pothole protection plate can be fixedly connected to the eccentric pressure block through the connecting rod.

[0012] In the above-mentioned active pothole protection mechanism of an aerial work platform, the width of the connecting end of the eccentric pressure block is greater than the width of the free end, the pressure block counterweight block extends from near the connecting end to the connecting end, and one end of the connecting rod is hingedly connected to one end of the two pressure block plates respectively, and one end of the pressure block counterweight block has a clearance gap corresponding to the connecting rod. The connection end of the eccentric pressure block can be limited by the clearance gap, and the pothole protection plate can be stably set on the side of the fork chassis, and the supporting effect of the pothole protection plate can be improved to ensure the protective effect.

[0013] In the above-mentioned active pothole protection mechanism for an aerial work platform, the top shaft assembly includes a top shaft mounting seat arranged on the fork frame chassis, a top shaft body is vertically and movably penetrated in the top shaft mounting seat, and the upper end of the top shaft body acts on the fork frame and the lower end acts on the free end of the eccentric pressure block, and the top shaft mounting seat can be conveniently installed and arranged on the end of the fork frame chassis, and when the fork frame is folded, the fork frame moves downward to the top shaft body, and the top shaft body can move downward to the free end.

[0014] In the above-mentioned active pothole protection mechanism for an aerial work platform, the free end of the eccentric pressure block is provided with a pressure block roller abutting against the top shaft body, and the pressure block roller is rotatably arranged between the pressure block plates. By abutting against the top shaft body, the service life of the eccentric pressure block can be increased and the maintenance cost can be reduced.

[0015] In the above-mentioned active pothole protection mechanism of an aerial work platform, a pressure block mounting seat is provided on the fork frame chassis, and one end of the eccentric pressure block close to the free end is rotatably arranged between the eccentric pressure block and the base through a mounting shaft, and the pressure block mounting seat is in an L-shaped structure, and a space for the eccentric pressure block to swing is formed between the pressure block mounting seat and the fork frame chassis, and one side of the eccentric pressure block has an arc-shaped notch corresponding to one side of the lower end of the pressure block mounting seat, and a limiting portion corresponding to one side of the eccentric pressure block is provided on the fork frame chassis, and a hinge point between the connecting end of the eccentric pressure block and the connecting rod is located below the connecting line between the hinge point between the connecting rod and the protective plate hinge seat and the mounting shaft, and the arc-shaped notch can ensure that there is no collision between the eccentric pressure block and the pressure block mounting seat, thereby ensuring the smoothness of the movement of the eccentric pressure block, and the limiting portion can limit the eccentric pressure block. The eccentric pressure block is ensured to be stably arranged, and when the hinge point between the connecting end of the eccentric pressure block and the connecting rod is located above the hinge point between the connecting rod and the hinge seat of the protection plate and the connecting line between the mounting shaft, the movement limit of the hinge point between the connecting end of the eccentric pressure block and the connecting rod cannot be generated, resulting in that when the pothole protection plate is contracted inwardly by external force, the eccentric pressure block will move upward, affecting the safety of high-altitude operations, and when the hinge point between the connecting end of the eccentric pressure block and the connecting rod is located below the hinge point between the connecting rod and the hinge seat of the protection plate and the connecting line between the mounting shaft, the hinge point between the connecting end of the eccentric pressure block and the connecting rod is an over-dead point, and when the pothole protection plate is contracted inwardly by external force, the eccentric pressure block moves toward the limiting part, and the eccentric pressure block can be limited by the limiting part to lock the eccentric pressure block, thereby effectively preventing the eccentric pressure block from contracting due to external force and ensuring the safety of high-altitude operations.

[0016] Compared with the existing technology, the advantages of the utility model are:

[0017] 1. The eccentric pressure block can easily control the pothole protection plate through the pressure block counterweight block and the connecting rod. It has a simple structure and reduces maintenance costs.

[0018] 2. The limiting part can limit the eccentric pressure block, ensure the locking effect of the pothole protection plate, and ensure the safety of aerial operations.

[0019] 3. The protection plate placement groove can facilitate the collection and placement of the pothole protection plate, which can provide a protective effect for the pothole protection plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the utility model.

[0021] Figure 2 It is a structural schematic diagram of a fork frame chassis of the utility model.

[0022] Figure 3 It is a structural schematic diagram of the utility model when the pothole protection plate is in a retracted state.

[0023] Figure 4 It is a structural schematic diagram of the utility model when the pothole protection plate is in an open state.

[0024] Figure 5 This is a schematic diagram of the structure of the limiting part of the utility model.

[0025] In the figure: fork chassis 1, protection plate placement groove 11, pressure block mounting seat 12, mounting shaft 13, fork frame 2, pothole protection plate 3, top shaft assembly 4, top shaft mounting seat 41, top shaft body 42, eccentric pressure block 5, pressure block plate 51, pressure block counterweight block 52, clearance gap 521, free end 53, connecting end 54, arc-shaped gap 55, protection plate hinged mounting structure 6, protection plate hinged seat 61, protection plate hinged shaft 62, connecting rod 7, pressure block roller 8, and limiting part 9. DETAILED DESCRIPTION

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, the present invention is an active pothole protection mechanism for an aerial work platform, comprising a fork frame chassis 1, a fork frame 2 which can be lifted up and down is movably provided on the upper end of the fork frame chassis 1, a pothole protection plate 3 is movably provided at the bottom of the fork frame chassis 1, and the pothole protection plate 3 can protect the fork frame chassis 1, a top shaft assembly 4 corresponding to the fork frame 2 is provided on the outer side of the fork frame chassis 1, an eccentric pressure block 5 is provided between the top shaft assembly 4 and the pothole protection plate 3, and when the fork frame 2 abuts against the top shaft assembly 4, the pothole protection plate 3 can be retracted to the bottom of the fork frame chassis 1, and when the fork frame 2 is separated from the top shaft assembly 4, the pothole protection plate 3 can be expanded outside the fork frame chassis 1 under its own action, and the eccentric pressure block 5 can be driven by the top shaft assembly 4 The pothole protection plate 3 is controlled, and when the fork frame 2 is raised, the eccentric pressure block 5 and the pothole protection plate 3 are automatically reset, and the pothole protection plate 3 is automatically reset to the side of the fork frame chassis 1, reducing the ground clearance between the fork frame chassis 1 and the ground, and when encountering a bumpy road surface, it can play a good supporting effect to ensure the stability of the fork frame chassis 1; and when the fork frame 2 is retracted, the fork frame 2 drives the top shaft assembly 4 to move downward, and one end of the top shaft assembly 4 abuts against the eccentric pressure block 5, and drives one end of the eccentric pressure block 5 to move downward, and the other end of the eccentric pressure block 5 is lifted upward, thereby driving the pothole protection plate 3 to be retracted, thereby increasing the ground clearance between the fork frame chassis 1 and the ground, and ensuring the passability of the fork frame chassis 1.

[0028] Specifically, the pothole protection plate 3 is in the shape of an elongated strip, and the pothole protection plate 3 is movably arranged on the bottom side of the fork chassis 1 through the protection plate hinged mounting structure 6, and the pothole protection plate 3 is extended along the axial length direction of the fork chassis 1, and a protection plate placement groove 11 for placing the pothole protection plate 3 is provided at the bottom of the fork chassis 1. The protection plate placement groove 11 can facilitate the placement of the pothole protection plate 3 in the fork chassis 1 when it is folded, which can play a protective role for the pothole protection plate 3, and the protection plate hinged mounting structure 6 can make the pothole protection plate 3 fixedly connected to the fork chassis 1, thereby ensuring the protective effect of the pothole protection plate 3 on the fork chassis 1.

[0029] Among them, the protection plate hinged mounting structure 6 includes protection plate hinge seats 61 respectively arranged at both ends of the pothole protection plate 3, and the ends of the protection plate hinge seats 61 away from the pothole protection plate 3 are hingedly connected to the bottom sides of the fork chassis 1 through protection plate hinge shafts 62. The pothole protection plate 3 can be rotatably set through the protection plate hinge shaft 62, and the protection plate hinge seat 61 can ensure that it is fixedly connected to the fork chassis 1.

[0030] like Figure 2 , Figure 3 , Figure 4 As shown, the top shaft assembly 4 and the eccentric pressure block 5 are respectively movably arranged on the outer side of one axial end of the fork chassis 1, and the eccentric pressure block 5 is hingedly linked with the pothole protection plate 3. The top shaft assembly 4 can drive one end of the eccentric pressure block 5 to move downward, and the up and down movement of the end of the eccentric pressure block 5 can enable the pothole protection plate 3 to change into different usage states, so that the switch structure of the pothole protection plate 3 is simpler and the maintenance cost is lower.

[0031] Furthermore, the eccentric pressure block 5 includes two symmetrically arranged pressure block plates 51, and the pressure block plates 51 are connected via a pressure block counterweight block 52. The pressure block counterweight block 52 can increase its own weight and ensure the self-resetting effect of the eccentric pressure block 5.

[0032] Among them, one end of the eccentric pressure block 5 has a free end 53 and the other end is a connecting end 54. The connecting end 54 of the eccentric pressure block 5 is hingedly connected to the protection plate hinge seat 61 at one end of the pothole protection plate 3 through a connecting rod 7. When the connecting end 54 of the eccentric pressure block 5 is raised, the pothole protection plate 3 can be driven to be set in the protection plate placement groove 11 through the connecting rod 7, and the pothole protection plate 3 can be fixedly connected to the eccentric pressure block 5 through the connecting rod 7.

[0033] Combination Figure 1 , Figure 2 Figure 3 , Figure 4As shown, the width of the connecting end 54 of the eccentric pressure block 5 is greater than the width of the free end 53, and the pressure block counterweight 52 extends from near the connecting end 54 to the connecting end 54, which can increase the deadweight of the connecting end 54, ensuring that when the fork frame 2 rises, the eccentric pressure block 5 can automatically unfold the pothole protection plate 3 through the connecting end 54, and one end of the connecting rod 7 is hingedly connected to one end of the two pressure block plates 51 respectively, and one end of the pressure block counterweight 52 has a clearance notch 521 corresponding to the connecting rod 7. The clearance notch 521 can limit the connecting end 54 of the eccentric pressure block 5, and can ensure that the pothole protection plate 3 is stably set on the side of the fork frame chassis 1, and can ensure the supporting effect of the pothole protection plate 3, and ensure the protective effect.

[0034] Among them, the top shaft assembly 4 includes a top shaft mounting seat 41 arranged on the fork frame chassis 1, and a top shaft body 42 is vertically and movably penetrated in the top shaft mounting seat 41, and the upper end of the top shaft body 42 acts on the fork frame 2 and the lower end acts on the free end 53 of the eccentric pressure block 5. The top shaft mounting seat 41 can facilitate the top shaft body 42 to be installed and set at the end of the fork frame chassis 1, and when the fork frame 2 is folded, the fork frame 2 moves downward to the top shaft body 42, and the top shaft body 42 can move downward to the free end 53.

[0035] Specifically, the free end 53 of the eccentric pressure block 5 is provided with a pressure block roller 8 that abuts against the top shaft body 42, and the pressure block roller 8 is rotatably set between the pressure block plates 51. By abutting against the pressure block roller 8 and the top shaft body 42, the service life of the eccentric pressure block 5 can be improved and the maintenance cost can be reduced.

[0036] Combination Figure 2 , Figure 3 , Figure 4 , Figure 5As shown, a pressure block mounting seat 12 is provided on the fork frame chassis 1, and one end of the eccentric pressure block 5 close to the free end 53 is rotatably arranged between the eccentric pressure block 5 and the base through the mounting shaft 13. The pressure block mounting seat 12 is an L-shaped structure, and a space for the eccentric pressure block 5 to swing is formed between the pressure block mounting seat 12 and the fork frame chassis 1. One side of the eccentric pressure block 5 has an arc-shaped notch 55 corresponding to one side of the lower end of the pressure block mounting seat 12, and a limiting portion 9 corresponding to one side of the eccentric pressure block 5 is provided on the fork frame chassis 1. The hinge point between the connecting end 54 of the eccentric pressure block 5 and the connecting rod 7 is located below the connecting line between the hinge point between the connecting rod 7 and the protective plate hinge seat 61 and the mounting shaft 13. The arc-shaped notch 55 can ensure that there is no collision between the eccentric pressure block 5 and the pressure block mounting seat 12, thereby ensuring the smoothness of the movement of the eccentric pressure block 5. The limiting portion 9 can limit the eccentric pressure block 5, thereby ensuring that the eccentric pressure block 5 can be stably set, and when The hinge point between the connecting end 54 of the eccentric pressure block 5 and the connecting rod 7 is located above the connecting line between the connecting rod 7 and the protective plate hinge seat 61 and the installation axis 13, and the movement limit of the hinge point between the connecting end 54 of the eccentric pressure block 5 and the connecting rod 7 cannot be generated, resulting in that when the pothole protection plate 3 is contracted inwardly by external force, the eccentric pressure block 5 will move upward, affecting the safety of high-altitude operations, and when the hinge point between the connecting end 54 of the eccentric pressure block 5 and the connecting rod 7 is located below the connecting line between the connecting point between the connecting rod 7 and the protective plate hinge seat 61 and the installation axis 13, the hinge point between the connecting end 54 of the eccentric pressure block 5 and the connecting rod 7 is an over-dead point, and when the pothole protection plate 3 is contracted inwardly by external force, the eccentric pressure block 5 moves toward the limiting portion 9, and the limiting portion 9 can limit the eccentric pressure block 5, lock the eccentric pressure block 5, and effectively prevent the eccentric pressure block 5 from contracting due to external force, thereby ensuring the safety of high-altitude operations.

[0037] The principle of this embodiment is that when the fork frame 2 is raised, the connecting end 54 of the eccentric pressure block 5 can drive the connecting rod 7 to open the pothole protection plate 3 through its own weight, and the eccentric pressure block 5 can be limited by the limiting portion 9, thereby ensuring the stability of the pothole protection plate 3 set on the side of the fork frame chassis 1, reducing the ground clearance between the fork frame chassis 1 and the ground, and when encountering a pothole road surface, it can play a good supporting effect to ensure the stability of the fork frame chassis 1; when the fork frame 2 is retracted, the fork frame 2 drives the top shaft assembly 4 to move downward, and the free end 53 of the eccentric pressure block 5 abuts against the top shaft assembly 4 through the pressure block roller 8, and the free end 53 of the eccentric pressure block 5 moves downward through the top shaft assembly 4, and the connecting end 54 drives the pothole protection plate 3 to be collected through the connecting rod 7, and the pothole protection plate 3 is set in the protection plate placement groove 11, The ground clearance between the fork frame chassis 1 and the ground is increased, and the passability of the fork frame chassis 1 is ensured.

[0038] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0039] Although this article uses more terms such as fork chassis 1, protection plate placement groove 11, pressure block mounting seat 12, mounting shaft 13, fork frame 2, pothole protection plate 3, top shaft assembly 4, top shaft mounting seat 41, top shaft body 42, eccentric pressure block 5, pressure block plate 51, pressure block counterweight 52, clearance gap 521, free end 53, connecting end 54, arc gap 55, protection plate hinged mounting structure 6, protection plate hinge seat 61, protection plate hinge shaft 62, connecting rod 7, pressure block roller 8, and limiter 9, it does not exclude the possibility of using other terms. The use of these terms is only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. An active pothole protection mechanism for an aerial work platform, comprising a fork frame chassis (1), wherein a fork frame (2) capable of being raised and lowered is movably provided at the upper end of the fork frame chassis (1), and a pothole protection plate (3) is movably provided at the bottom of the fork frame chassis (1), characterized in that: The outer side of the fork chassis (1) is provided with a top shaft assembly (4) corresponding to the fork frame (2), and between the top shaft assembly (4) and the pothole protection plate (3) is provided an eccentric pressure block (5) which can cause the pothole protection plate (3) to be retracted to the bottom of the fork chassis (1) when the fork frame (2) abuts against the top shaft assembly (4) and can cause the pothole protection plate (3) to be expanded outside the fork chassis (1) under its own action when the fork frame (2) is separated from the top shaft assembly (4).

2. The active pothole protection mechanism for an aerial work platform according to claim 1, characterized in that: The pothole protection plate (3) is in the shape of an elongated strip. The pothole protection plate (3) is movably arranged on the bottom side of the fork frame chassis (1) through a protection plate hinged mounting structure (6). The pothole protection plate (3) is extended along the axial length direction of the fork frame chassis (1). A protection plate placement groove (11) for placing the pothole protection plate (3) is provided at the bottom of the fork frame chassis (1).

3. The active pothole protection mechanism for an aerial work platform according to claim 2, characterized in that: The protection plate hinged mounting structure (6) comprises protection plate hinge seats (61) respectively arranged at both ends of the pothole protection plate (3); the ends of the protection plate hinge seats (61) away from the pothole protection plate (3) are hingedly connected to the bottom side of the fork chassis (1) via protection plate hinge shafts (62).

4. An active pothole protection mechanism for an aerial work platform according to claim 1, 2 or 3, characterized in that: The top shaft assembly (4) and the eccentric pressure block (5) are respectively movably arranged on the outer side of one axial end of the fork frame chassis (1), and the eccentric pressure block (5) is hingedly linked with the pothole protection plate (3).

5. The active pothole protection mechanism for an aerial work platform according to claim 3, characterized in that: The eccentric pressure block (5) comprises two symmetrically arranged pressure block plates (51), and the pressure block plates (51) are connected via a pressure block counterweight block (52).

6. The active pothole protection mechanism for an aerial work platform according to claim 5, characterized in that: The eccentric pressure block (5) has a free end (53) at one end and a connecting end (54) at the other end. The connecting end (54) of the eccentric pressure block (5) is hingedly connected to a protection plate hinge seat (61) at one end of the pothole protection plate (3) via a connecting rod (7).

7. The active pothole protection mechanism for an aerial work platform according to claim 6, characterized in that: The width of the connecting end (54) of the eccentric pressure block (5) is greater than the width of the free end (53); the pressure block counterweight (52) extends from near the connecting end (54) to the connecting end (54); one end of the connecting rod (7) is hingedly connected to one end of the two pressure block plates (51), and one end of the pressure block counterweight (52) has a clearance notch (521) corresponding to the connecting rod (7).

8. The active pothole protection mechanism for an aerial work platform according to claim 6, characterized in that: The top shaft assembly (4) comprises a top shaft mounting seat (41) arranged on the fork frame chassis (1), a top shaft body (42) is vertically and movably penetrated in the top shaft mounting seat (41), and the top shaft body (42) acts on the fork frame (2) at its upper end and acts on the free end (53) of the eccentric pressure block (5) at its lower end.

9. The active pothole protection mechanism for an aerial work platform according to claim 8, characterized in that: The free end (53) of the eccentric pressure block (5) is provided with a pressure block roller (8) which abuts against the top shaft body (42), and the pressure block roller (8) is rotatably arranged between the pressure block plates (51).

10. The active pothole protection mechanism for an aerial work platform according to claim 8, characterized in that: A pressure block mounting seat (12) is provided on the fork frame chassis (1), and one end of the eccentric pressure block (5) close to the free end (53) is rotatably arranged between the eccentric pressure block (5) and the base through a mounting shaft (13). The pressure block mounting seat (12) is in an L-shaped structure, and a space for the eccentric pressure block (5) to swing is formed between the pressure block mounting seat (12) and the fork frame chassis (1). One side of the eccentric pressure block (5) has an arc-shaped notch (55) corresponding to the lower end side of the pressure block mounting seat (12), and a limiting portion (9) corresponding to the side of the eccentric pressure block (5) is provided on the fork frame chassis (1). The hinge point between the connecting end (54) of the eccentric pressure block (5) and the connecting rod (7) is located below the connecting line between the hinge point between the connecting rod (7) and the protective plate hinge seat (61) and the mounting shaft (13).

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