Superlift device for telescopic boom and telescopic boom type crane
A technology of super-lifting device and telescopic boom, which is applied in cranes and other directions, can solve problems such as the total boom length, lifting height and maximum lifting weight constraints of cranes.
Active Publication Date: 2010-06-09
XUZHOU HEAVY MASCH CO LTD
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Problems solved by technology
In order to avoid excessive deflection of the boom, the total load must be controlled; thus, the total boom length, lifting height and maximum lifting weight of the crane are severely restricted
Method used
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[0030] The core idea of the present invention is to use the super-lifting device provided to balance the bending moment of the weight acting on the telescopic boom, which can effectively avoid the large deflection of the boom, which is beneficial to improve the lifting tonnage of the telescopic boom crane, Performance indicators such as working height and amplitude.
[0031] The present embodiment will be described in detail below in conjunction with the accompanying drawings.
[0032] see figure 1 , which is a schematic diagram of the overall structure of the first embodiment of the super-elevation device provided by the present invention. The super-lifting device shown in the figure is arranged on the basic arm 10 of the telescopic boom crane.
[0033] The basic arm mentioned in this article refers to the first section of the arm that is hinged with the upper part of the telescopic boom crane. At least one telescopic boom is set in the basic boom, and the telescopic boom...
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The invention discloses a superlift device for a telescopic boom, which comprises at least one bracket, a first tensioning device and a second tensioning device. The fixed end of the bracket is connected with the basic boom of a telescopic boom type crane; the first tensioning device is arranged between the movable end of the bracket and the outer end part of an arbitrary telescopic boom of the telescopic boom type crane; and the second tensioning device is arranged between the movable end of the bracket and the root of the basic boom. The stressed state of the telescopic boom is obviously improved, the flexivity of a boom bracket is obviously reduced under identical operation condition, and the performance indexes of the telescopic boom, such as the lifting tonnage, the operational height and amplitude and the like, are greatly improved. Preferably, the number of the brackets, derricking cylinders, the first tensioning devices and the second tensioning devices is respectively two, and the brackets, the derricking cylinders, the first tensioning devices and the second tensioning devices are divided into two groups and are symmetrically arranged on two sides of the basic boom of the telescopic boom type crane, so as to realize the self-assembly operation of the superlift device. The invention also discloses a telescopic boom type crane with the superlift device.
Description
technical field [0001] The invention relates to a telescopic boom crane, in particular to a telescopic boom super-lifting device and a telescopic boom crane. Background technique [0002] Telescopic boom cranes have been widely used in engineering operations due to their advantages of flexible operation, pick-up and walk-up. With the large-scale development of construction projects, there are higher requirements for various performance indicators of telescopic boom cranes, such as: lifting tonnage, working height and range, etc. [0003] As we all know, increasing the performance indicators such as lifting tonnage, working height and amplitude will increase the arm length and self-weight of the boom. On large cranes, the weight of the boom often accounts for more than 23% of the weight of the whole machine. . The ensuing problem is that the increase in the length and weight of the crane arm will make the stress on the jib when lifting heavy objects worse and worse, and the...
Claims
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IPC IPC(8): B66C23/687B66C23/697B66C23/82B66C23/84
Inventor 单增海李恩全张海燕曹立峰刘邦才
Owner XUZHOU HEAVY MASCH CO LTD