Oil cylinder support structure with H-shaped frame

Abstract

The invention relates to various medium-and-large rotary drilling rigs, and discloses an oil cylinder support structure with an H-shaped frame, which can adjust caterpillar bands to have the maximum width by changing oil cylinders in the design of a chassis with width-adjustable caterpillar bands. The oil cylinder support structure comprises the H-shaped frame, pin shafts, the oil cylinders, a main vertical plate and other parts. When the oil cylinder support structure is assembled, the main vertical plate, auxiliary plates and a bottom plate are welded into a part; the part is placed on a lower cover plate in the middle of the H-shaped frame after being machined; and an upper cover plate and the lower cover plate are in welding connection with inner vertical plates, so that the rigidity of the frame at the connecting position is greatly enhanced. A supporting lug at one end of each oil cylinder is arranged between the main vertical plate and a corresponding auxiliary plate and is connected with the main vertical plate and the corresponding auxiliary plate through pin shafts. The cross section of a cantilever beam on which the H-shaped frame is symmetrically arranged has a sealed rectangular structure; the sealed rectangular structure is enclosed by the upper cover plate, the lower cover plate, outer vertical plates and the inner vertical plates; the end part of the inner vertical plate close to the main vertical plate has a semi-sealed structure; by a bending process, the inner vertical plates can be in welding connection with the upper cover plate and the main vertical plate simultaneously; and oil cylinder mounting and maintaining spaces are reserved on the lower parts of the inner vertical plates.

Description

technical field [0001] The invention relates to a chassis of a crawler type rotary drilling rig, a structure in which the span of the crawler track can be changed by changing the stroke of an oil cylinder, and is especially suitable for the chassis of engineering machinery with an H-shaped frame structure. Background technique [0002] At present, in order to ensure the stability of the whole machine during the operation of the rotary drilling rig, most crawler-type rotary drilling rigs adopt a structure with adjustable lateral span of the crawler. When the equipment is in the transportation state, the outer width of the left and right crawlers is retracted to the minimum size. To enter the construction state, the crawlers must be fully extended to ensure that the lateral width reaches the maximum. The change of the track span is through the hydraulic cylinder installed in the frame, and the end of the piston rod pushes the bracket on the longitudinal beam to realize the cha...

AI Technical Summary

Problems solved by technology

During long-term use, the threaded connection structure is very prone to loosening. If maintenance cannot be performed in time, the thread will be damaged soon, resulting in the failure of the structure; The threaded pin shaft connection structure, these parts are installed inside the H-shaped frame with a small space, which brings great inconvenience whether it is daily inspection or maintenance, and the thread damage of this structure often occurs

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