Jack for highway bridge

Abstract

The invention discloses a jack for a highway bridge. The jack for the highway bridge comprises a load-bearing head and a protecting ring. The protecting ring is arranged on the bottom part of the load-bearing head; a connecting ring is fixedly connected to the bottom part of the protecting ring; a cylinder is connected to the bottom part of the connecting ring; a base is connected to the bottom part of the cylinder; fixed screws are arranged on the top part of the base; a pressurizing column is connected to the top part of the right side of the base; a connecting block is rotatably connected to the top part of the pressurizing column; a rotating block is connected to the top part of the pressurizing column; a cross rod is rotatably connected to the right side of the rotating block; an extending head is fixedly connected to the right side of the cross rod; fixed holes are formed in four corners of the base; the fixed screws penetrate through the fixed holes so as to fix the jack to thetop part of the ground, and nail points penetrate into the ground so as to be fixed into the ground, so that the fixing performance is better; and cross-shaped holes are formed in the top parts of screw caps, and the fixed screws can be easily taken down through a screwdriver, so that the convenience in operation is realized.

Description

technical field [0001] The invention relates to the technical field of highway bridge construction, in particular to a jack for highway bridges. Background technique [0002] Jack refers to the light and small lifting equipment that uses a rigid top lifting part as a working device, and the weight is lifted in a small stroke by a top bracket or a bottom claw. The jack is mainly used in factories, mines, transportation and other departments as vehicle repair and other lifting, support and other work. Its structure is light and strong, flexible and reliable, and can be carried and operated by one person. [0003] Jacks are divided into mechanical jacks and hydraulic jacks, etc., and the principles are different. In principle, the most basic principle of hydraulic transmission is Pascal's law, that is to say, the pressure of the liquid is the same everywhere. Thus, in a balanced system, the smaller piston exerts less pressure and the larger piston exerts more pressure, keepi...

AI Technical Summary

Problems solved by technology

[0004] The existing technology has the following problems: the existing jack is connected with a triangular plate around the cylinder, and the bottom of the triangular plate is fixedly connected with the base. The building materials are jacked up, and the jack cannot be tilted and overturned during use. Multiple triangular plates support the base and column, but the quality of the triangular plates may be uneven during manufacture, which will cause the jack to fall. If there is an inclination and the base is placed on the ground, if there is an error in the angle of jacking up the building materials, the base will be off the ground, causing damage to the jack and falling of the building materials, and even injuring construction workers

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