Multi-head screw tightening device capable of preventing screw from being scratched

Abstract

The invention discloses a multi-head screw tightening device capable of preventing a screw from being scratched. The multi-head screw tightening device comprises a cylindrical screw and a tightening head, wherein the cylindrical screw is mounted at the lower end of the tightening head; a hexagonal screw head is arranged at the upper end of the cylindrical screw; six guide clamping balls are uniformly arranged on the outer wall of the tightening head on the outer side of the bottom of a screw head clamping groove; the six guide clamping balls are vertically tangent to the inner wall of the screw head clamping groove, so that the tightening head can be conveniently and automatically rotated and adjusted under the action of the six guide clamping balls, and the screw head clamping groove in the outer wall of the lower end of the tightening head can be approximately aligned with the hexagonal screw head; furthermore, when the tightening head is pressed downwards, the hexagonal screw head can automatically slide into the screw head clamping groove, so that the hexagonal screw head can be conveniently and quickly positioned, and the phenomenon that the surface of the screw is scratched due to relatively large friction between the tightening head and the hexagonal screw head is avoided; and a manual fixing mode is replaced, so that more physical power is saved, and the working efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field related to screw installation, and in particular relates to a multi-head screw tightening device for preventing screw scratches. Background technique [0002] Screw refers to a screw (foreign name: Screw), which is a tool for gradually tightening the device parts by using the physical and mathematical principles of the oblique circular rotation and friction of the object. Screw is a general term for fasteners, a daily colloquial language. Screw is a common fastener, widely used in machinery, electrical appliances and buildings. The general material is metal or plastic, and it is cylindrical in shape, and the concave-convex grooves engraved on the surface are called threads. In order to save labor and convenience during screw installation, it is usually necessary to use a tightening head to assist the installation. [0003] The existing tightening head technology for screw installation has the following pr...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a multi-head screw tightening device that prevents the screw from being scratched, so as to solve the problem that the hexagonal nail head proposed in the above background technology is installed in the nail head installation groove at the lower end of the tightening head and requires manual alignment. Scratches on the surface of the nail head, easy to shake problems after installing the cylindrical screw on the tightening head

Images