Mechanical fixing and anti-falling device for small arm of aerial work platform

Abstract

The utility model relates to a kind of high-altitude working vehicle small arm mechanical type fixed anti-drop device, belong to high-altitude working vehicle field.The utility model includes limit pin, spring steel plate, guide portion and limit slot, the limit pin is welded on small arm, and can move with small arm, the front end of spring steel plate is bent and is provided with guide portion, and form limit slot, the guide portion and limit slot are all with limit pin cooperation, the rear end of spring steel plate is fixed with rotary table, further include bolt, fixed block and connecting block, the fixed block is welded on rotary table, the connecting block is connected with fixed block by bolt, the rear end of spring steel plate is connected with connecting block by bolt, further include adjusting washer, the adjusting washer is arranged between the rear end of spring steel plate and connecting block, the limit pin is cylindrically structured, the guide portion is set as V-shaped curved surface, the limit pin is contacted with guide portion, or limit pin is located in limit slot.

Description

Technical Field

[0001] This utility model relates to a mechanical fixing and anti-detachment device for the boom of an aerial work platform, belonging to the field of aerial work platforms. Background Technology

[0002] According to the standard GB 7258 "Technical Conditions for Safe Operation of Motor Vehicles", the special structure and special devices of special-purpose vehicles should not affect the safe operation of the motor vehicle, and the special equipment should be securely fixed. Many models of aerial work platforms on the market have added a forearm section to the end of the boom to increase the height and flexibility of aerial work within a limited space. However, when the vehicle is in motion, this forearm must be retracted to a certain angle to avoid affecting the vehicle's length. Therefore, it is necessary to secure the forearm to prevent it from detaching while the aerial work platform is in motion.

[0003] Currently, the main methods for fixing the forearm include straps, pins, spring pins, and electromagnets. Straps are the most widely used due to their simplicity and low cost, but they require manual binding and unbinding each time, resulting in low efficiency and susceptibility to strap quality. Pins reduce the fixing time, but still require manual fixing and unbinding. Spring pins optimize the process by eliminating manual fixing, but manual removal is still required. Electromagnets automate the operation and provide strong, secure suction, but their reliability is lower than mechanical structures, making them prone to failure. They also require circuitry for automatic control, which is costly, so they are rarely used. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned shortcomings in the existing technology and to provide a mechanical fixing and anti-detachment device for the forearm of an aerial work platform with a reasonable structural design, further optimized forearm fixing method, simple structure, reliable fixing, wide application range, and no need for manual operation.

[0005] The technical solution adopted by this utility model to solve the above problems is: the mechanical fixing and anti-detachment device for the boom of the aerial work vehicle, which is characterized by the following: including a limiting pin, a spring steel plate, a guide part and a limiting groove. The limiting pin is welded to the boom and can move with the boom. The front end of the spring steel plate is bent to provide a guide part and form a limiting groove. The guide part and the limiting groove are both in cooperation with the limiting pin. The rear end of the spring steel plate is fixed to the turntable.

[0006] Furthermore, it also includes bolts, fixing blocks, and connecting blocks. The fixing blocks are welded to the turntable, the connecting blocks are connected to the fixing blocks by bolts, and the rear end of the spring steel plate is connected to the connecting blocks by bolts.

[0007] Furthermore, it also includes an adjusting shim, which is disposed between the rear end of the spring steel plate and the connecting block.

[0008] Furthermore, the limiting pin is configured in a cylindrical shape.

[0009] Furthermore, the guide portion is configured as a V-shaped curved surface.

[0010] Furthermore, the limiting pin contacts the guide portion, or the limiting pin is located within the limiting groove.

[0011] Compared with existing technologies, this utility model has the following advantages: the fixed anti-detachment device can replace the fixing methods such as straps, pins, spring pins, and electromagnets. By bending the front end of the spring steel plate to form a guide part and a limiting groove, the guide part can contact the limiting pin when the boom retracts, thus playing a guiding role. The limiting groove securely engages the limiting pin, preventing the limiting pin from detaching from the spring steel plate during vehicle operation. No manual operation is required throughout the process. When the boom of the aerial work platform is retracted, the device moves into position accordingly, preventing the boom from detaching during the operation of the aerial work platform and causing traffic accidents, thus ensuring the driving safety of the aerial work platform. Attached Figure Description

[0012] Figure 1 This is an overall schematic diagram of the mechanical fixing and anti-detachment device for the boom of an aerial work vehicle according to an embodiment of this utility model.

[0013] Figure 2 yes Figure 1 A magnified schematic diagram of part I in the diagram.

[0014] Figure 3a This is a schematic diagram of the device in the present invention when it enters the working state (forearm fixed initial state).

[0015] Figure 3b This is a schematic diagram of the device entering the working state (intermediate process of forearm fixation) according to an embodiment of the present invention.

[0016] Figure 3c This is a schematic diagram of the device in the present invention when it enters the working state (forearm fixed end state).

[0017] Figure 4a This is a schematic diagram of the device in a non-working state (initially in the state of releasing the forearm fixation) according to an embodiment of the present invention.

[0018] Figure 4b This is a schematic diagram of the device in the non-working state of this utility model embodiment (the intermediate process of releasing the forearm fixation).

[0019] Figure 4cThis is a schematic diagram of the device in a non-working state (the state of releasing the forearm fixation) according to an embodiment of the present invention.

[0020] Figure 5 This is a schematic diagram of the boom fixing process of the aerial work platform vehicle in motion, according to an embodiment of this utility model.

[0021] In the diagram: 1. Limit pin; 2. Spring steel plate; 3. Bolt; 4. Fixing block; 5. Connecting block; 6. Adjusting shim; 7. Guide part; 8. Limit groove; 9. Forearm A; 10. Turntable B. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and through embodiments. The following embodiments are explanations of the present invention, but the present invention is not limited to the following embodiments.

[0023] Example

[0024] See Figures 1 to 5 As shown in the accompanying drawings, the structures, proportions, sizes, etc., depicted in this specification are merely for illustrative purposes to aid those skilled in the art and to provide a clear understanding. They are not intended to limit the scope of this invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, provided they do not affect the effectiveness or purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the use of terms such as "upper," "lower," "left," "right," "middle," and "one" in this specification is solely for clarity and not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0025] The mechanical fixing and anti-detachment device for the boom of the aerial work vehicle in this embodiment includes a limiting pin 1, a spring steel plate 2, a bolt 3, a fixing block 4, a connecting block 5, an adjusting shim 6, a guide part 7, and a limiting groove 8. The limiting pin 1 is set in a cylindrical structure.

[0026] In this embodiment, the limiting pin 1 is welded to the forearm A and can move with the forearm A. The front end of the spring steel plate 2 is bent to provide a guide part 7 and form a limiting groove 8. The rear end of the spring steel plate 2 is fixed to the turntable B. The guide part 7 is set as a V-shaped curved surface. Both the guide part 7 and the limiting groove 8 cooperate with the limiting pin 1. That is to say, the limiting pin 1 is in contact with the guide part 7, or the limiting pin 1 is located in the limiting groove 8.

[0027] The fixing block 4 is welded to the turntable B, the connecting block 5 is connected to the fixing block 4 by bolts, the rear end of the spring steel plate 2 is connected to the connecting block 5 by bolts 3, and the adjusting shim 6 is set between the rear end of the spring steel plate 2 and the connecting block 5.

[0028] Limit pin 1 is the actuator of the anti-detachment device. Its contact surface is an arc surface, which can reduce the frictional resistance with spring steel plate 2. Spring steel plate 2 and bolt 3 are the core mechanisms of the anti-detachment device. The number of spring steel plates 2 is determined according to the total mass of the forearm A and the structure on the forearm A to ensure that the spring steel plates 2 will not be damaged by the limit pin 1. Spring steel plate 2 is made of steel with good elasticity, and the head of the contact end is designed as a V-shaped curved guide part 7. When the forearm A retracts, the front makes contact first, so that the spring steel plate 2 is subjected to force at the same time. During the retraction of the forearm A, the limit pin 1 will move along the V-shaped curved guide part 7. After it reaches the position, the spring steel plate 2 resets and at the same time provides upward and inward movement resistance to the limit pin 1 to ensure that the forearm A will not detach when the vehicle is in motion.

[0029] The connecting block 5 has mounting holes in two planes. One set is used to connect with the fixing block 4. Through the oblong hole on the fixing block 4, the alignment dimension of the spring steel plate 2 and the limit pin 1 is adjusted to avoid motion interference. The other set is connected to the spring steel plate 2 to ensure that there is no relative movement when the spring steel plate 2 deforms. Adjusting shims 6 are installed between the connecting block 5 and the spring steel plate 2. The number is not fixed. They are used to adjust the height direction of the device to avoid the influence of manufacturing errors.

[0030] Specifically, such as Figure 1 As shown, the limiting pin 1 is welded to the forearm A and moves with the forearm A; the spring steel plate 2 is connected to the connecting block 5 by bolts 3, and bolts 3 can adjust the resistance of the spring steel plate 2; the fixing block 4 is welded to the turntable B and is equipped with a waist-shaped hole, which is the positioning reference of the device; the connecting block 5 is connected to the fixing block 4 by bolts, which can adjust the alignment dimension between the spring steel plate 2 and the limiting pin 1 to avoid motion interference; the adjusting shims 6 are installed between the connecting block 5 and the spring steel plate 2, and the number is not fixed, which are used to adjust the height direction matching dimension of the device to avoid the influence of manufacturing errors.

[0031] like Figures 3a-3c As shown, under the action of the driving force, the forearm A retracts, and the limiting pin 1 on the forearm A first moves to the position of contact with the spring steel plate 2; the forearm A continues to move, and the limiting pin 1 remains in contact with the front guide part 7 of the spring steel plate 2. The spring steel plate 2 is deformed under force, and the maximum deformation occurs when the limiting pin 1 moves to the middle position where it contacts the bottom end of the spring steel plate 2; then the forearm A continues to move, and the spring steel plate 2 rebounds. The limiting pin 1 remains in contact with the rear guide part 7 of the spring steel plate 2. When the spring steel plate 2 rebounds to the initial position, the limiting pin 1 reaches the working position, and the driving force stops.

[0032] like Figures 4a-4cAs shown, under the action of the driving force, the forearm A extends. During the process of the limiting pin 1 on the forearm A moving from the initial position to the middle position, the limiting pin 1 remains in contact with the rear guide part 7 of the spring steel plate 2. The spring steel plate 2 deforms under the force, and the maximum deformation occurs when the limiting pin 1 moves to the middle position where it contacts the bottom end of the spring steel plate 2. Then the forearm A continues to move, the spring steel plate 2 rebounds, and the limiting pin 1 remains in contact with the front guide part 7 of the spring steel plate 2. When the spring steel plate 2 rebounds to the initial position, the limiting pin 1 reaches the disengagement position, and the forearm A can move freely with the driving force.

[0033] See Figure 5 When the aerial work platform with boom A is in motion, the anti-detachment device is in the working position: at this time, boom A is not driven by any force, only by inertia. The design requires that the inertia of the boom part is not enough to cause the spring steel plate 2 to undergo maximum deformation, so as to ensure that boom A is fixed and does not detach.

[0034] Furthermore, it should be noted that the specific embodiments described in this specification may differ in the shape and name of their components. The above description is merely illustrative of the structure of this utility model. All equivalent or simple variations made based on the structure, features, and principles described in this utility model are included within the protection scope of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, as long as they do not deviate from the structure of this utility model or exceed the scope defined by the claims, all of which should fall within the protection scope of this utility model.

Claims

1. A mechanical fixing and anti-detachment device for the boom of an aerial work platform, characterized in that: It includes a limiting pin (1), a spring steel plate (2), a guide part (7) and a limiting groove (8). The limiting pin (1) is welded to the forearm (A) and can move with the forearm (A). The front end of the spring steel plate (2) is bent to provide a guide part (7) and form a limiting groove (8). The guide part (7) and the limiting groove (8) are both in cooperation with the limiting pin (1). The rear end of the spring steel plate (2) is fixed to the turntable (B).

2. The aerial work platform boom mechanical fixing and anti-detachment device according to claim 1, characterized in that: It also includes bolts (3), fixing blocks (4) and connecting blocks (5), the fixing blocks (4) being welded to the turntable (B), the connecting blocks (5) being connected to the fixing blocks (4) by bolts, and the rear end of the spring steel plate (2) being connected to the connecting blocks (5) by bolts (3).

3. The mechanical fixing and anti-detachment device for the boom of an aerial work platform according to claim 1, characterized in that: It also includes an adjusting shim (6), which is disposed between the rear end of the spring steel plate (2) and the connecting block (5).

4. The mechanical fixing and anti-detachment device for the boom of an aerial work platform according to claim 1, characterized in that: The limiting pin (1) is set in a cylindrical structure.

5. The mechanical fixing and anti-detachment device for the boom of an aerial work platform according to claim 1, characterized in that: The guide part (7) is configured as a V-shaped curved surface.

6. The mechanical fixing and anti-detachment device for the boom of an aerial work platform according to claim 1, characterized in that: The limiting pin (1) is in contact with the guide part (7), or the limiting pin (1) is located in the limiting groove (8).

Images