Revolution device for lorry-mounted crane
A technology of truck-mounted crane and slewing device, applied in cranes and other directions, can solve the problems of time-consuming and laborious assembly, shortened service life of dynamic seals, idle space of gear shafts, etc., and achieves the effect of compact structure and reduced installation space.
Inactive Publication Date: 2012-07-11
CHANGZHI QINGHUA MACHINERY FACTORY +1
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Problems solved by technology
Therefore, the use of threaded connection has the following disadvantages: 1. The production cost of static seal is high, and the assembly is time-consuming and laborious; The directional wear of the dynamic seal between the piston and the cylinder reduces the service life of the dynamic seal
[0003] The rotary motion of the large-tonnage truck-mounted crane is realized through the meshing of the rack piston rod of the oil cylinder and the gear shaft under the column. A rack piston rod meshes with the gear shaft below the column to realize the rotary motion of the truck-mounted crane, which requires a large piston cylinder bore, which will cause the piston cylinder to occupy a large space on one side of the gear shaft, and the other side of the gear shaft. The space is empty and not fully utilized, resulting in an uncompact structure and increasing the overall weight and installation space of the large-tonnage truck-mounted crane
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[0015] Such as figure 1 , figure 2 As shown, the slewing device of a truck-mounted crane in the present invention includes a gear shaft 1, a gear 2, a first slewing rack cylinder 3 and a second slewing rack cylinder 4, and a gear 2 is installed on the lower end of the gear shaft 1. A rotary rack cylinder 3 and a second rotary rack cylinder 4 are installed parallel to the base beam and arranged symmetrically on both sides of the gear shaft 1. The gear 2 on the gear shaft 1 is connected with the first rotary rack cylinder 3 and the second rotary rack cylinder respectively. The racks in the rack cylinder 4 are meshed.
[0016] The structure of the first rotary rack cylinder 3 is as follows: a piston 6 is installed in each of the two cylinders 5, and the two ends of the rack piston rod 7 are respectively connected with the pistons 6 in the two cylinders 5, wherein The connecting side of each piston 6 and the rack piston rod 7 is provided with a T-shaped hanging post 8, and the ...
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The invention relates to a revolution device for a lorry-mounted crane, and belongs to the field of revolution oil cylinders. In order to solve the technical problem, the invention provides a revolution device which can reduce a space for installing the large-tonnage lorry-mounted crane to ensure that a revolution mechanism of the large-tonnage lorry-mounted crane is compact in structural arrangement. In the technical scheme for solving the technical problem, a gear is arranged on the lower end part of a gear shaft; a first revolution rack cylinder and a second revolution rack cylinder are parallel to a base crossbeam and are arranged on two sides of the gear shaft symmetrically; the gear on the gear shaft is meshed with racks in the first revolution rack cylinder and the second revolution rack cylinder; and the second revolution rack cylinder and the first revolution rack cylinder have the same structure. The revolution device can be widely applied to the field of revolution oil cylinders of cranes.
Description
technical field [0001] The invention relates to a rotary device of a truck-mounted crane, which belongs to the technical field of rotary oil cylinders, and in particular relates to a rotary oil cylinder of a truck-mounted crane. Background technique [0002] The rotary motion of the truck-mounted crane is realized through the rotary motion of the gear shaft driven by the rack of the rotary cylinder. The connection between the rack piston rod and the piston of the rotary cylinder is generally threaded. In order to ensure that the oil will not leak to the side of the piston rod, a sealing ring needs to be added to the joint between the piston rod and the piston for static sealing. Therefore, the use of threaded connection has the following disadvantages: 1. The production cost of static seal is high, and the assembly is time-consuming and laborious; The directional wear of the dynamic seal between the piston and the cylinder reduces the service life of the dynamic seal. [0...
Claims
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IPC IPC(8): B66C23/86
Inventor 王乐有赵振峰陈延伟宋慧强宋丽娟杨利杰刘志安
Owner CHANGZHI QINGHUA MACHINERY FACTORY