Bearing shaft, guide shaft, pin shaft, cantilever crane and assembly method thereof and crane

Abstract

The invention relates to a bearing shaft, a guide shaft, a pin shaft, a cantilever crane and an assembly method thereof and a crane. The bearing shaft has a cylindrical bearing shaft body (1); and a releasable first locking mechanism is arranged on at least one end surface of the bearing shaft body. The guide shaft comprises a guide shaft body (2) having a positive conical surface or a positive frustum surface; and a releasable second locking mechanism is arranged on the bottom surface of the guide shaft body. The pin shaft (5) comprises the bearing shaft and the guide shaft; the bearing shaft and the guide shaft are releasably joined through the fit between the first locking mechanism and the second locking mechanism; and the pin shaft further comprises a through hole (6) penetrating through the bearing shaft body in a radial direction. The pin shaft is reduced in manufacturing cost while being lowered in weight.

Description

Technical field [0001] The present invention relates to a shaft part, in particular to a bearing shaft, a guide shaft and a pin shaft. Further, the present invention relates to a boom and crane. In addition, the present invention also relates to a boom assembly method. Background technique [0002] Pins are a kind of fasteners that play a connecting role, which are widely used in the connection of two parts in construction machinery to form a hinge connection. For example, such as figure 1 with figure 2 As shown, the boom connection of the crane in the prior art is realized by a pin shaft 10, the pin shaft 10 includes a bearing shaft 20 and a guide shaft 30, wherein the bearing shaft 20 is used to bear the gravity of the crane boom 50, The guide shaft 30 is used to guide the pin shaft 10 to facilitate assembly to the arm frame 50, and the pin shaft 10 is fixed on the arm frame 50 by a spring clip 40. Here, in order to facilitate the disassembly and assembly of the pin shaft 1...

AI Technical Summary

Problems solved by technology

[0003] Additionally, if figure 2 As shown, the traditional pin shaft 10 includes a bearing shaft 20 and a guide shaft 30, and in order to facilitate the disassembly and assembly of the pin shaft 10, the length of the guide shaft 30 of the pin shaft 10 is set longer. High, and because the bearing, 20 and the guide shaft 30 are non-detachable structures, the weight of the pin shaft 10 is also relatively large

[0004] The pin shaft of the above structure has the following disadvantages: due to the large number of boom pin shafts, the overly long guide shaft not only increases the cost of pin shaft material and heat treatment, but also increases the weight of the pin shaft, resulting in an increase in the weight of the entire boom frame, thereby reducing lifting performance

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