Mounting structure of pin shaft, jib structure of engineering machinery and concrete pumping device

Abstract

The invention discloses a mounting structure of a pin shaft, which comprises an object to be connected (1) and the pin shaft (2) passed through the object to be connected, two ends of the pin shaft are supported by the object to be connected, wherein, the mounting structure of the pin shaft provided in the invention also comprises a support member (4) of a support pin shaft, the support member ispositioned between two ends of the supported pin shaft, and a weight reduction removal part (21) is provided on the pin shaft. The invention also discloses a jib structure of the engineering machinery of the mounting structure of the pin shaft, and a concrete pumping device by using the jib structure. Because the support member is provided between two ends of the supported pin shaft, the distribution of the bending load on the pin shaft is distributed with a more reasonable mode, deformation is small during the operation, therefore the mounting dimension can not be influenced, and the connection of the pin shaft is more stable, in addition, a weight reduction removal part is provided with the pin shaft to realize the effective weight reduction of the pin shaft. The mounting structure is used for realizing the weight reduction of the jib and raising the practicality.

Description

technical field [0001] The invention relates to the field of pin shaft installation, in particular to a pin shaft installation structure, an engineering machinery boom structure using the mounting structure, and concrete pumping equipment using the boom structure. Background technique [0002] In various construction machinery such as concrete pumping equipment, the use of pin shafts for hinge connection is widely used, especially the foldable boom structure, which mainly includes the hinge connection between the arm and the arm, the hinge between the connecting rod and the arm Connection, etc., in which the hinge connection of two relatively rotating parts is realized by the pin shaft, and the load of one part is transferred to the other part. by figure 1 In the boom structure shown as an example, the boom section 61 and the connecting rod 62 are connected by the pin shaft 2, wherein the visible connecting rod 62 is an outer connecting rod, and there is another identical c...

AI Technical Summary

Problems solved by technology

[0003] In this installation structure in the prior art, since only two ends of the pin shaft are supported by the connecting rod 62, the overall deformation of the pin shaft will be relatively large during operation, and the assembly size will be affected, making the connection stability of the pin shaft poor.

In order to reduce the deformation of the pin shaft, the technical solution of increasing the diameter of the pin shaft is usually used in the prior art. However, with the development of construction machinery such as pump trucks to the direction of long arms and large-scale, the pin shaft as a connecting piece needs to be The lighter the weight, the better. If the diameter of the pin shaft is increased, the pin shaft will become heavier, which is not good for the weight reduction of the jib and other equipment.

Images