Rope pulley assembly and construction machinery

Abstract

The invention discloses a rope pulley assembly. The rope pulley assembly comprises a pulley body (1) around which a steel wire rope (30) coils, and a bracket assembly for supporting and fixing the pulley body, wherein the bracket assembly comprises a supporting frame (2) and a supporting part (3); one end of the supporting frame (2) is connected to a base body (10) and the other end of the supporting frame (2) is provided with a supporting point (8); a shaft supporting part of the pulley body is formed at one end of the supporting part (3), and the other end of the supporting part (3) is hinged with the supporting point, so that the pulley body can be switched between a working position (W) where the pulley body is completely exposed from the outer part of the base body and a storing position (S) where the pulley body can be hidden in the base body. The invention also discloses an engineering mechanism. The engineering mechanism comprises a main arm (100), a secondary arm (200), and an amplitude variation system which is connected between the main arm and the secondary arm and used for performing amplitude variation work; the amplitude variation system comprises the abovementioned rope pulley assembly. With the adoption of the rope pulley assembly, reliable safety clearance can be achieved through few rope pulleys and in a simple rope coiling manner; in addition, the arrangement is easy, and the transferring is convenient.

Description

technical field

[0001] The invention relates to the field of construction machinery, in particular to a rope-passing pulley assembly and construction machinery. Background technique

[0002] The tower working condition of the crane expands the working space due to its high lifting height and the ability to cross higher obstacles to achieve "leap-forward" hoisting. In recent years, when the products of small and medium tonnage cranes are being upgraded, they often choose to add tower working conditions to strengthen their competitive advantages.

[0003] The luffing system of crawler crane is an important load-bearing component to realize the jib luffing operation. attached Figures 1 to 3 It is a schematic diagram of a crane in the prior art. When designing the tower working condition system, the luffing jib front strut 400 and the luffing jib rear strut 500 are generally arranged. The angle between the front strut 400 of the luffing jib and the rear strut 500 of the luff...

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