Screw driver with adjustable torque

Abstract

The invention provides a torque-adjustable screwdriver, comprising a handle, a screwdriver rod and a screwdriver head, a connecting shaft, a connecting head, an adjusting ring, a central rod and a ball bearing spring torsion mechanism; wherein, the connecting shaft is connected at the front end of the handle; the connecting head is connected at the front end of the connecting shaft and sleeved at the rear end of the screwdriver rod; the adjusting ring is sleeved on the handle, the connecting shaft and the connecting head; one end of the central rod is inserted into the connecting shaft and connected with the connecting shaft and the other end thereof is inserted into the screwdriver rod and connected with the screwdriver rod; the ball bearing spring torque mechanism pushes through the connecting shaft in the radial direction, the internal end thereof is connected with the central rod in a contacting way and the external end thereof is connected with the adjusting ring in a contacting way. When the torque-adjustable screwdriver of the invention is in use, the torque can be effectively controlled, the operation is convenient, an idler rotation effect can be generated when the force is excessive, and the operated workpiece can be effectively protected.

Description

technical field [0001] The invention relates to a hand tool, in particular to a screw driver with adjustable torque. Background technique [0002] Screwdrivers are widely used in screw dismounting various workpieces, and the screwdrivers of the prior art generally include manual screwdrivers, electric screwdrivers, and pneumatic screwdrivers. The electric and pneumatic screwdrivers of the prior art have torque adjustment functions, but due to the large volume and the influence of connected electric wires or air pipes, the limitations of use are relatively large, and they are mostly used for fixed posts in the production line. When the manual screwdriver disassembles and assembles various workpieces, due to the high or low force, it will cause the brittle workpieces to twist or loosen the connection, especially the screw connection of plastic parts. High force will cause the screw hole to be damaged, thus Resulting in the scrapping of the entire workpiece (such as a plastic ...

AI Technical Summary

Problems solved by technology

The electric and pneumatic screwdrivers in the prior art have torque adjustment functions, but due to the large volume and the influence of the connected wires or air pipes, the use of them is relatively limited, and they are mostly used in fixed positions on the production line.

When the manual screwdriver disassembles and assembles various workpieces, due to the high or low force, it will cause the brittle workpieces to twist or loosen the connection, especially the screw connection of plastic parts. High force will cause the screw hole to be damaged, thus Resulting in the scrapping of the entire workpiece (e.g. plastic casing)

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