Lock pin device for preventing horizontal supporting leg of engineering machinery from extending outwards

Abstract

The invention provides a lock pin device for preventing a horizontal supporting leg of engineering machinery from extending outwards. The device comprises a locking plate and a lock pin assembly; thelocking plate is fixedly connected to a movable supporting leg box; a locking clamping groove is formed in the end face of the side, away from the movable supporting leg box, of the locking plate; anopening is formed in the far end face of a sleeve of the lock pin assembly; the sleeve is fixed on a fixed supporting leg box; the near end of a pin shaft stretches into the sleeve; the far end of thepin shaft penetrates through the sleeve and the fixed supporting leg box and stretches out towards the direction of the locking plate; a baffle ring extends in the middle of the pin shaft; a spring sleeves the outer wall of the pin shaft in the sleeve; two ends of the spring abut against the baffle ring and the inner wall of the sleeve respectively; the locking plate moves along with the movablesupporting leg box; and the moving track of the locking clamping groove passes through the far end of the pin shaft. The device has the advantages that a user does not need to repeatedly insert and pull out a horizontal supporting leg lock pin; safety accidents caused by forgetting to insert and pull out the pin are avoided; installation is flexible, and the lock pin device can be installed at anyproper position of a movable supporting leg; and a working device is very simple, cost is low and maintenance is convenient.

Description

technical field [0001] The invention relates to a locking pin device for preventing horizontal outriggers of engineering machinery from stretching out. Background technique [0002] The main components of construction machinery, such as truck cranes and concrete pump trucks, can be divided into the working part on the car and the chassis part supported by the car when getting off the car. Especially for truck cranes, in order to support the hoisting and heavy load requirements during work, an outrigger system is set up. The outriggers are divided into horizontal outriggers and vertical outriggers. [0003] Such as figure 1 As shown (Part No. 1 is the horizontal outrigger; Part No. 2 is the vertical outrigger; Part No. 3 is the locking device; Part No. 4 is the chassis frame of the truck crane), the truck crane outriggers are divided into horizontal outriggers and vertical outriggers , when the truck crane is hoisting, first extend the horizontal outrigger (such as figure ...

AI Technical Summary

Problems solved by technology

But the existing lock pin device has the following disadvantages: 1, construction machinery, especially truck cranes on the market, the horizontal outrigger lock pin devices are all manual plug-in type; When the truck crane is in the driving state, the locking pin device of the horizontal outrigger must be guaranteed to be in the locked state

However, after using the truck crane, the user often forgets to lock the locking pin device of the horizontal outrigger, and then when the truck crane is driving, the horizontal outrigger will automatically extend due to the centrifugal force of the road turning and other reasons, which may easily cause serious safety accidents; 3 、Users need to constantly plug and unplug the pins when using the crane, which is very cumbersome

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