Engineering vehicles and their spare tire racks

Abstract

The invention provides an engineering vehicle and a spare tire rack thereof. The spare tire rack comprises a spare tire installation support, a swing rod and a driving device; the spare tire installation support comprises a spare tire fixing part which is fixedly connected with a spare tire; a first end of the swing rod comprises a hinge part which is hinged with a vehicle frame; the spare tire installation support is arranged on the swing rod, and has the moving states of rotating around the axis of the swing rod and moving along the axis of the swing rod relative to the swing rod; the driving device is connected with a second end of the swing rod; and the swing rod is driven by the driving device to rotate around the hinge part of the swing rod. According to the spare tire rack, the spare tire fixing part of the spare tire installation support is very easily adjusted to a position at which the installation hole of the spare tire fixing part corresponds to a wheel felloe hole of the spare tire through the rotation of the swing rod, the rotation of the spare wire installation support around the axis of the swing rod and the movement of the spare tire installation support along the axis of the swing rod, so that the spare tire can be fixedly connected with the spare tire installation support conveniently.

Description

technical field [0001] The invention relates to the field of vehicles, more specifically, to an engineering vehicle and a spare tire rack thereof. Background technique [0002] The working environment of construction vehicles is harsh, and spare tires are essential. In the prior art, there are mainly two kinds of spare tire racks: hydraulic type and mechanical type. Considering aspects such as reliability and cost, mechanical spare tire racks are mainly used on engineering vehicles. [0003] The common construction vehicle spare tire rack in the prior art has only a spare tire fixing device and no labor-saving structure, and its lifting is directly completed by manpower or other hoisting equipment, which is labor-intensive and requires many people or other equipment to complete the spare tire replacement. The other is that the spare tire rack itself has a labor-saving mechanism, but the labor-saving effect is not obvious, and it lacks a set of convenient spare tire install...

AI Technical Summary

Problems solved by technology

[0006] The main defect of the spare tire rack of the first prior art is that: the worm gear mechanism 1' moves with the steel pipe 4', and when the spare tire 10 rises to a higher height, it is inconvenient to drive the worm gear mechanism 1'

[0010] Before the spare tire 10 is lifted, it is difficult to install it on the spare tire mounting bracket 3

Since the spare tire mounting bracket 3 has less freedom of movement, and the spare tire 10 itself is heavy and inconvenient to move, it is very difficult to align the mounting holes on the spare tire rim with the spare tire mounting bracket 3

[0011] Difficult to fix spare tire 10

In the prior art, the spare tire 10 is generally fixed from inside the rim, but the spare tire 10 itself is large in size and can only be fixed to the frame with long bolts. Due to the existence of machining errors, it is difficult to ensure the parallelism of the axes between the long bolts.

[0012] It is difficult to lift the spare tire 10, and the hand cranking force is relatively large

The main reason is that the labor-saving ratio is small, and the labor-saving effect is not obvious; the friction force of the pulley, guide rail and hand-operated mechanism in the mechanism is relatively large, which increases the load on the chain rope; easy card

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