Jack device with height capable of being freely adjusted

Abstract

The invention discloses a jack device with the height capable of being freely adjusted. The device comprises a machine body. A second valve is arranged at the right side of a first valve in the bottomwall of a first sliding space in a communicating manner; a second gear is meshed with a first gear and a third gear; a push rod pushes oil to generate pressure to generate power to push an ejector rod to move upwards; the ejector rod moves upwards to lift a heavy object upwards; a cam is utilized to make contact with a pressing rod, the cam rotates to enable the pressing rod to move up and down to extrude oil in a pressure space, and a rocker is driven to rock without manual up-and-down pushing, so that manpower is saved, and efficiency is improved; and electrified magnets and permanent magnets are controlled to make contact with a toothed bar to make a heavy object lowed at any time when the heavy object needs to be lowered, and lifted at any time when heavy object needs to be lifted, sothat the problem that a one-way toothed bar can only be lifted in one direction in the prior art is solved.

Description

technical field [0001] The invention relates to the field of cranes, in particular to a jack device whose height can be adjusted freely. Background technique [0002] The jack refers to a light and small lifting device that uses a rigid lifting piece as a working device, and lifts heavy objects in a small stroke through the top bracket or bottom claw. The jack is mainly used in factories, mines, transportation and other departments as vehicle repair and Other lifting, support and other work, [0003] Jacks currently on the market are usually hand-cranked jacks. Because the weight of the heavy object is usually greater than manpower, it is designed as a ratchet, which cannot be lowered during the lifting process. It can only be lowered when it is lifted to the limit, and the flexibility is not high often. Bring puzzlement, therefore, need a kind of jack device that can automatically adjust height to solve above problem. Contents of the invention [0004] The object of the...

AI Technical Summary

Problems solved by technology

[0003] Jacks currently on the market are usually hand-cranked jacks. Because the weight of the heavy object is usually greater than manpower, it is designed as a ratchet, which cannot be lowered during the lifting process. It can only be lowered when it is lifted to the limit. The flexibility is not high. Bring trouble, therefore, need a kind of jack device that can automatically adjust the height to solve the above problems

Images