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Side face underload weld joint cargo boom

A technology of light load and boom, which is applied in the direction of cranes, etc., can solve the problems of not reducing the strength of the boom, affecting the strength of the boom, reducing the weight of the boom, etc., so that it is not easy to open welding, save materials, avoid The effect of welding

Inactive Publication Date: 2020-01-31
姚运文
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the strength of the boom cannot be reduced while reducing the weight of the boom, so it is necessary to make reasonable improvements in the structure of the boom
Most of the jibs of the existing cranes are processed by welding. For the convenience of processing and manufacturing, the welds of this jib are mostly set at the corners of the jib. The welds are stressed, tensile and The compressive strength is lower than other non-welded positions of the boom, seriously affecting the strength of the boom
Therefore, this kind of multi-welded jib is relatively easy to open welding and cause accidents during use, and it is not safe and reliable to use.

Method used

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  • Side face underload weld joint cargo boom
  • Side face underload weld joint cargo boom
  • Side face underload weld joint cargo boom

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment one, such as figure 1 As shown, it includes an inner arm 1 and an outer arm 2. The inner arm 1 is set in the outer arm 2 along the extending direction of the hollow cavity of the outer arm 2. The two upper corner positions of the rear end of the inner arm 1 are respectively provided with The upper sliding wear-resistant block 3 that is slidably matched to the two inner corner positions on the upper side of the arm 2, and the lower sliding wear-resistant block 4 that is slidably fitted to the lower outer wall of the inner arm 1 on the lower inner wall of the front end of the outer arm 2 , the inner arm 1 and the outer arm 2 are respectively composed of two parts, the upper arm body and the lower arm body folded into a groove shape. The butt edge positions of the left and right sides are welded together as a whole.

[0012] The positions of the welds on the same side of the inner arm 1 and the outer arm 2 are staggered up and down without interfering with each...

Embodiment 2

[0016] Embodiment two, such as figure 2 As shown, the difference from Embodiment 1 is that the middle position of the upper arm body of the inner arm 1 and the outer arm 2 is a plane 5 extending along the direction of the cavity of the inner arm 1, and the two sides of the plane 5 are folded downward to form a 90-degree circle. Arc-shaped, the lower sides of two 90-degree circular arcs are parallel and extend downwards to form the left and right facades 7 of the upper arm body. The lower sides of the lower arm bodies of the inner arm 1 and the outer arm 2 are axially along the inner arm 1. A 180-degree arc-shaped surface 8 extending along the direction of the cavity. The edges on both sides of the 180-degree arc-shaped surface 8 extend upwards in parallel to form two left and right facades 7 of the lower arm body. The inner arm 1 and the outer The lower sides of the two facades 7 of the upper arm body of the arm 2 are welded to the upper sides of the two facades 7 of the lowe...

Embodiment 3

[0017] Embodiment three, such as image 3 As shown, the difference from Embodiment 1 is that the middle position of the upper arm bodies of the inner arm 1 and the outer arm 2 is a plane 5 extending along the direction of the cavity of the inner arm 1, and the two sides of the plane 5 are folded downwards to form a right angle. , the lower sides of the two right angles are parallel and extend downwards to form the left and right facades 7 of the upper arm body. The extended 180-degree arc-shaped surface 8, the edges on both sides of the 180-degree arc-shaped surface 8 extend upwards in parallel to form the left and right facades 7 of the lower arm body, and the upper arm body of the inner arm 1 and the outer arm 2 The lower sides of the two facades 7 are welded to the upper sides of the two facades 7 of the lower arms of the inner arm 1 and the outer arm 2 respectively, and each upper sliding wear-resistant block 3 is connected to the two inner corners on the upper side of the...

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Abstract

The invention relates to a side face underload weld joint cargo boom which comprises an inner arm (1) and an outer arm (2). The inner arm (1) is sleeved in the outer arm (2) in the stretching direction of a hollow cavity of the outer arm (2). The inner arm (1) and the outer arm (2) are each formed by an upper arm body and a lower arm body which are folded into a groove shape. Groove openings of the upper arm bodies and the lower arm bodies of the inner arm (1) and the outer arm (2) are oppositely buckled to form a hollow cavity, and the positions of the butt-joint sides of the left side face and the right face are welded into a whole. The side face underload weld joint cargo boom is high in strength, light and high in use reliability, and open welding is not prone to happening. Weld jointsare arranged at the positions of the two side faces of the cargo boom, the cargo boom can form a structure that the upper part and the lower part are welded on the side faces, the bearing force on the weld joints is reduced by 40%, the open welding phenomenon generated by long-time bearing of the weld joints is effectively avoided, and reliability and safety of a lazy arm are improved.

Description

technical field [0001] The invention relates to lifting equipment, in particular to a lifting arm. Background technique [0002] The boom is an important part of the crane. The lighter the weight of the boom, the better the lifting capacity. Therefore, crane manufacturers should take various methods to reduce the weight of the boom. However, the strength of the boom cannot be reduced while reducing the weight of the boom, so a reasonable improvement in the structure of the boom is required. Most of the jibs of existing cranes are processed by welding. For the convenience of processing and manufacturing, the welds of this jib are mostly set at the corners of the jib. The welds are stressed, and the tensile and The compressive strength is lower than other non-welded positions of the boom, seriously affecting the strength of the boom. Therefore this multi-weld jib is easier to open welding and have an accident during use, and it is not safe and reliable to use. Contents of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B66C23/687
CPCB66C23/701
Inventor 姚运文姚婧辉
Owner 姚运文
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