Anti-slip arm device of overhead working truck and overhead working truck

Abstract

The utility model discloses an anti-slip arm device of an overhead working truck and the overhead working truck. The anti-slip arm device comprises a first limiting block arranged below a tail telescopic arm and a second limiting block arranged on a frame support, the bottom face of the first limiting block is in face contact with the top face of the second limiting block, an included angle alpha is formed between the contact face of the first limiting block and the second limiting block and the slip arm direction of the telescopic arm, and the included angle alpha is larger than the included angle alpha. The included angle a ranges from 20 degrees to 80 degrees. According to the utility model, the telescopic arm is effectively prevented from sliding downwards.

Description

Technical Field

[0001] The utility model relates to an aerial work vehicle, in particular to an anti-slip arm device of the aerial work vehicle and the aerial work vehicle. Background Art

[0002] Aerial work vehicles with telescopic arms usually have the first section of the telescopic arm driven by a telescopic cylinder, and the other sections of the telescopic arm are driven by chains or wire ropes to achieve synchronous extension and retraction with the first section of the telescopic arm. When the vehicle is retracted, the telescopic arm retracts and forms a negative angle with the frame support surface. Due to the influence of gravity and gravity acceleration, the telescopic arm will naturally extend and cause the arm to slip, which poses a great safety hazard to normal driving.

[0003] At present, the anti-slip arm device of the existing vehicle-mounted aerial work vehicle is provided by setting a first limit block under the telescopic arm of the last section, fixing a bracket on the frame, and fixing a second limit block with an extended edge on the bracket by bolts. The first and second limit blocks are both rectangular blocks, and the first and second limit blocks are respectively arranged parallel to the telescopic arm of the last section. The downward sliding movement of the first limit block is blocked by the upward extended edge of the tail end of the second limit block on the frame to prevent the telescopic arm from sliding out. Obviously, the design is all based on the extended edge of the second limit block on the frame to achieve the limitation of the telescopic arm. Because during the limitation process, the bottom surface of the first limit block cannot form effective tension with the entire top surface of the second limit block, which can easily cause damage to the second limit block or limitation failure. Utility Model Content

[0004] The technical problem to be solved by the utility model is that, in view of the shortcomings of the existing anti-slip arm device for aerial work vehicles, the utility model provides an anti-slip arm device for aerial work vehicles and an aerial work vehicle which can avoid limit failure.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0006] A device for preventing an aerial work vehicle from sliding off its arm comprises a first limit block arranged below a telescopic arm at the end, and a second limit block arranged above a frame bracket, wherein the bottom surface of the first limit block contacts the top surface of the second limit block, and the contact surfaces of the first limit block and the second limit block have an angle a with the direction of sliding of the telescopic arm, and the degree of the angle a is 20-80 degrees.

[0007] In the retracted state, since the telescopic arm is at a negative angle, the telescopic arm will only slide down parallel to the arm body of the last telescopic arm. The utility model designs the contact surfaces of the first and second limit blocks to have an angle of 20-80 degrees with the sliding direction of the telescopic arm, so that a certain tension is naturally formed on the contact surfaces of the first and second limit blocks, thereby effectively avoiding limit failure.

[0008] Preferably, the first limiting block is a right-angle trapezoidal block.

[0009] Preferably, the second limiting block is a right-angle trapezoidal block.

[0010] Preferably, the first limiting block and the second limiting block form a rectangular block, and the inclined surface of the first limiting block is in surface contact with the inclined surface of the second limiting block.

[0011] Preferably, the second limiting block is fixed on the frame bracket by bolts.

[0012] Preferably, the angle a is 30 degrees.

[0013] Based on the same inventive concept, the utility model also provides an aerial work vehicle, which includes the anti-slip arm device.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model designs the contact surfaces of the first and second limit blocks to maintain a certain angle (20-80 degrees) with the sliding direction of the telescopic arm. When the telescopic arm tends to slide downward, the tension (reverse motion force) between the first and second limit blocks increases, thereby preventing the telescopic arm from sliding downward.

[0016] 2. The contact surface between the first and second limit blocks of the utility model is a plane, which will not affect the normal lifting of the telescopic arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 The utility model is a schematic diagram of the structure and arm sliding direction of the anti-slip arm device of the aerial work vehicle. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with specific preferred embodiments, but the protection scope of the present invention is not limited thereby.

[0020] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1 An embodiment of the anti-slip arm device for aerial work vehicles of the utility model includes a first limit block 2 arranged under the last telescopic arm 1, and a second limit block 4 fixedly installed on the frame bracket 3 by bolts, the bottom surface of the first limit block 2 is in contact with the top surface of the second limit block 4, and the contact surface of the first limit block 2 and the second limit block 4 has an angle a with the direction of the telescopic arm slipping, and the degree of the angle a is 20-80 degrees. The degree of the angle a is preferably 30 degrees.

[0023] In this embodiment, the first limit block 2 is a right-angled trapezoidal block, the second limit block 4 is also a right-angled trapezoidal block, the first limit block 2 and the second limit block 4 form a rectangular block, and the inclined surface of the first limit block 2 is in contact with the inclined surface of the second limit block 4. Obviously, the shapes of the first limit block 2 and the second limit block 4 of the utility model are not limited, as long as the contact surface of the first limit block 2 and the second limit block 4 has the angle a with the sliding direction of the telescopic arm.

[0024] In the retracted state, since the telescopic arm is in a negative angle state, the telescopic arm will only slide down parallel to the arm body of the last telescopic arm. At this time, since the contact surface of the first and second limit blocks has an angle a of 20-80 degrees with the sliding direction of the telescopic arm, a certain tension is naturally formed on the contact surface of the first and second limit blocks, which can effectively avoid the limit failure between the first and second limit blocks.

[0025] The above is only a specific implementation scheme of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the field can make many possible changes and modifications to the technical scheme of the utility model by using the technical content disclosed above without departing from the scope of the technical scheme of the utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the utility model without departing from the content of the technical scheme of the utility model shall fall within the protection scope of the technical scheme of the utility model.

Claims

1. An anti-slip arm device for an aerial work vehicle, comprising a first limit block arranged below the telescopic arm at the end, and a second limit block arranged above the frame bracket, wherein the bottom surface of the first limit block is in surface contact with the top surface of the second limit block, and characterized in that: There is an angle a between the contact surface of the first limit block and the second limit block and the sliding direction of the telescopic arm, and the degree of the angle a is 20-80 degrees.

2. The anti-slip arm device for aerial work vehicles according to claim 1, characterized in that: The first limiting block is a right-angle trapezoidal block.

3. The anti-slip arm device for aerial work vehicles according to claim 2, characterized in that: The second limiting block is a right-angle trapezoidal block.

4. The anti-slip arm device for aerial work vehicles according to claim 3, characterized in that: The first limiting block and the second limiting block form a rectangular block, and the inclined surface of the first limiting block is in surface contact with the inclined surface of the second limiting block.

5. The anti-slip arm device for aerial work vehicles according to claim 1, characterized in that: The second limiting block is fixed on the frame bracket by bolts.

6. The anti-slip arm device for aerial work vehicles according to claim 1, characterized in that: The degree of the angle a is 30 degrees.

7. An aerial work vehicle, characterized in that The invention comprises the anti-slip arm device according to any one of claims 1 to 6.

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