Arm frame and engineering machinery

A boom and slewing mechanism technology, used in cranes, hoisting devices, fire rescue and other directions, can solve the problems of eccentric load of the whole vehicle and affect the stability of the whole vehicle, and achieve the effect of improving stability and wide application range.
CN102701087BActive Publication Date: 2014-05-21BEIJING SANY HEAVY MASCH CO LTD
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING SANY HEAVY MASCH CO LTD
Publication Date
2014-05-21

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Abstract

The invention provides an arm frame. The arm frame comprises a first arm frame, a second arm frame, a variable amplitude mechanism for unfolding and folding the second arm frame, a rotary mechanism, a rotary drive device and a positioning device, wherein the rotary mechanism is mounted at one end of the first arm frame, and one end of the second arm frame is connected with the rotary mechanism; the rotary mechanism is driven by the rotary drive device to rotate so that the second arm frame can rotate around a rotary shaft line of the rotary mechanism; and after the second arm frame rotates to a position at an angle, the rotary mechanism is fixed through the positioning device so that the first arm frame and the second arm frame are kept in the angular relationship. The invention further discloses engineering machinery comprising the arm frame. Owing to the technical scheme, the eccentric load between the first arm frame and the second arm frame during operation can be removed, the stability of the whole vehicle can be improved, and the structures of the first arm frame and the second arm frame are not limited. Therefore, the arm frame is wide in range of application and is flexible and convenient.
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Description

technical field

[0001] The invention relates to the field of engineering machinery, in particular to an arm frame and an engineering machine with the arm frame. Background technique

[0002] With the rapid development of the economy, the number of high-rise buildings is increasing, and the height is getting higher and higher, which requires the higher working height of aerial work machinery and equipment. Due to the short length of the single-section boom, in order to achieve a higher working height, the existing aerial work machinery and equipment generally adopt the boom form of "No. 1 boom + No. 2 boom" or "main boom + auxiliary boom". The first arm (main arm) generally adopts a multi-section boom, the second arm (secondary arm) adopts a multi-section boom or a single-section boom, and a suitable connection structure is used between the first arm (main arm) and the second arm (secondary arm) , to meet the working requirements of the second arm (auxiliary arm).

[0003] ...

Claims

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