Telescopic arm device and construction vehicle
A technology of engineering vehicles and telescopic arms, which is applied to cranes and other directions, can solve problems such as high center of gravity of the boom and lower lifting performance of the boom, and achieve the effects of improving lifting performance, saving manpower and material resources, and reducing assembly difficulty
Inactive Publication Date: 2015-08-12
SANY AUTOMOBILE HOISTING MACHINERY
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Problems solved by technology
[0007] In the above-mentioned six-section boom telescopic device, the No. 2 oil cylinder is at the end of the third boom, and the center of gravity of the boom is higher when the boom is fully extended, which reduces the lifting performance of the boom.
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[0024] It should be noted that, in the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0025] see figure 2 , shows the structural principle diagram of the telescopic arm device provided by the embodiment of the present invention. It can be seen from the figure that the telescopic arm device includes: a first section arm 1 and a second section arm 2 , a third section arm 3 , a fourth section arm 4 , and a fifth section arm which are sequentially sleeved in the first section arm 1 . Sectional arm 5 and sixth section arm 6.
[0026] A first telescopic cylinder 71 and a second telescopic cylinder 72 are installed in the arm body. The piston rod of the first telescopic cylinder 71 is connected to the first joint arm 1 in a hinged manner, and the cylinder barrel of the first telesc...
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The invention provides a telescopic arm device and an engineering vehicle. The telescopic arm device comprises: a first arm section to a sixth arm section; a first telescopic cylinder; a second telescopic cylinder, wherein the end part of the cylinder of the second telescopic cylinder is provided with a first arm-extending wheel; a first arm-extending dragline; a second arm-extending wheel, which is arranged on the tail part of the fourth arm section; a third arm-extending wheel, which is arranged on the root part of the fifth arm section; a fourth arm-extending wheel, which is arranged on the tail part of the fifth arm section; a second arm-extending dragline; a first arm-retracting dragline; a second arm-retracting wheel, which is arranged on the root part of the fifth arm section; a second arm-retracting dragline; a third arm-retracting wheel, which is arranged on the root part of the third section arm; and a third arm-retracting dragline. The telescopic arm device provided by the invention has a light self-weight, and has the advantages of low production cost and good lifting ability.
Description
technical field [0001] The invention relates to the field of telescopic mechanisms, and more specifically, to a telescopic arm device and an engineering vehicle. Background technique [0002] The telescopic boom is the core component of the truck crane, and it is also the most important load-bearing structural part of the truck crane in the hoisting operation. The weight, strength and stiffness of the telescopic boom will directly affect the performance of the truck crane. There are mainly two forms of telescopic booms: oil cylinder rope row type and single cylinder bolt type. Considering the cost and related manufacturing technology, most of the products with a capacity of 100 tons or less currently use the more mature five-section telescopic boom and the telescopic boom below five sections. , and the inside of the telescopic arm adopts the cylinder rope row type. However, with the increasingly fierce market competition, the hoisting performance and hoisting height of tele...
Claims
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IPC IPC(8): B66C23/69
Inventor 周斌韩奎胡祥
Owner SANY AUTOMOBILE HOISTING MACHINERY