Pavement milling machine and landing leg swinging mechanism thereof

Abstract

A road milling machine and a leg swinging mechanism for same. The leg swinging mechanism comprises a dual-rocker mechanism formed of a frame (1), a swing rod (5), a rotatable sleeve rod (2), and a fixed connecting rod (4). The swing rod (5) and the rotatable sleeve rod (2) are rockers. The fixed connecting rod (4) is a connecting rod. A rotatable connection is formed between the fixed connecting rod (4) and the rotatable sleeve rod (2) with a leg (3) of the road milling machine being a hinge axis, and the fixed connecting rod (4) and the leg (3) are fixedly connected, and are parallel to each other before and after the swinging of the dual-rocker mechanism. The structure of the leg swinging mechanism does not change the travel direction of the tires or continuous tracks during the swinging of the leg (3), and with small movement ranges of the two rockers, the leg (3) located at the hinge point has a large displacement range, is compact in structure, and occupies a small space.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a road milling machine and a leg swing mechanism thereof. Background technique [0002] Road milling machine is one of the main types of road maintenance machinery, which is widely used in urban municipal road and highway maintenance projects. When the road surface milling machine is milling the edge of the road surface, one side of the outrigger needs to be swung to the inside of the milling machine, so that the milling device can successfully complete the milling of the road edge. At present, the general-purpose devices for swinging outriggers are implemented by rotating around a fixed axis. This way of swinging outriggers will cause a 180° change in the forward direction of the tires or crawlers connected to the outriggers. Therefore, it is necessary to increase the direction of rotation. Valves are used to switch the direction of the oil circuit to change the forward dir...

AI Technical Summary

Problems solved by technology

At present, the general-purpose devices for swinging outriggers are implemented by rotating around a fixed axis. This way of swinging outriggers will cause a 180° change in the forward direction of the tires or crawlers connected to the outriggers. Therefore, it is necessary to increase the direction of rotation. Valves are used to switch the direction of the oil circuit to change the forward direction of the tire or track, which not only increases the cost but also increases the operation steps, which is not convenient for users to use

In addition, the swing leg device of some milling machines adopts a parallelogram four-bar linkage mechanism to fix the leg on the connecting rod parallel to the frame. This structure does not change the tire or track when swinging the leg. forward direction, but the swing device has a large swing range, and a large space needs to be reserved

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