Supporting device and jack

Abstract

The invention discloses a supporting device and a jack and belongs to the field of hand-operated tools. The supporting device comprises a platform, length-adjustable supporting rods, supporting plates, flexible constraining pieces and a fixing ring. The upper ends of the supporting rods are hinged to the bottom face of the platform through upper hinges. The lower ends of the supporting rods are hinged to the top faces of the supporting plates through lower hinges. The middle portion of each supporting rod is connected with one end of the corresponding flexible constraining piece. The other end of each flexible constraining piece is connected with the fixing ring through a distance adjusting piece. The platform is kept level by adjusting the lengths and the unfolding angels of the supporting rods, and the supporting rods are fixed through the flexible constraining pieces and the fixing ring, so that the supporting device can be steadily placed on the uneven ground; and it is guaranteed that the vehicle-mounted jack placed on the platform is stable, the vehicle-mounted jack is well matched with a vehicle body, meanwhile the contact area of the supporting plates and the ground is increased, and the situation that when the vehicle-mounted jack works on the soft ground, the ground sinks and thus the vehicle-mounted jack sinks before the vehicle body is jacked up is avoided.

Description

technical field [0001] The invention relates to the field of hand tools, in particular to a supporting device and a jack. Background technique [0002] The jack is a lifting device with a small lifting height and simple and convenient use. [0003] The vehicle jack commonly used in automobiles is light and fast, and can meet the jacking up of small-tonnage automobiles to facilitate simple maintenance such as replacing spare tires and checking the chassis, so it is widely used. [0004] But, in the use process of vehicle-mounted jack, existing vehicle-mounted jack has following defect at least: [0005] 1. Since the existing vehicle jack is supported by the entire bottom surface, on uneven ground, the existing vehicle jack is prone to uneven force or unstable support. In this case, either the jack and the ground should be selected. But at this time the top surface of the jack and the body cannot be effectively matched, or the top surface of the jack is selected to fit well ...

AI Technical Summary

Problems solved by technology

[0005] 1. Since the existing vehicle jack is supported by the entire bottom surface, on uneven ground, the existing vehicle jack is prone to uneven force or unstable support. In this case, either the jack and the ground should be selected. But at this time the top surface of the jack and the body cannot be effectively matched, or the top surface of the jack is selected to fit well with the body, but at this time only part of the bottom surface of the jack is in contact with the ground. Or body wear, or even plastic deformation failure;

[0006] 2. Since the bottom surface of the existing vehicle jack is a narrow plane, when the existing jack is used on a soft ground, it is likely that the car body has not been lifted, but the jack has already sunk

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