RU1788927C - Universal screwdriver - Google Patents

Abstract

The invention relates to hand tools and can be used in mechanical engineering for loosening and tightening screws in hard-to-reach places. The purpose of the invention is to increase by; duty. The screwdriver comprises a hollow handle in which an interchangeable blade pack is placed. In the hollow handle, two half-couplings are placed, and the blades cover the emphasis. When working in the Screwdriver mode, the central blade is normal and with -.-, and in the Capture mode - the lateral and central blades. 2 s.p. f-ly, 4 ill.

Description

The invention relates to a hand tool for assembling and disassembling threaded joints and can be used in various branches of mechanical engineering and instrument engineering for unscrewing and tightening screws in hard-to-reach places.

A screwdriver is known that comprises a handle with a wedge-shaped blade fixed in it with longitudinal grooves and movable blades fastened to the wedge-shaped blade by a locking device.

The closest in technical essence is a universal screwdriver containing a hollow handle, a central blade located therein, a hinge for securing the latter and side blades mounted to move relative to the central blade, and an abutment surrounding the blades.

When working due to the great effort developed by unscrewing or screwing on the working parts of the side blades

overloads are present, which may result in their destruction.

The purpose of the invention is to increase reliability.

To achieve this goal, a universal screwdriver containing a hollow handle located in the central blade, a hinge for securing the latter and lateral blades mounted to move relative to the central blade, and an abutment surrounding the blades, is equipped with a leading popum / ft , coaxially located in it by the driven coupling half and the fixing elements installed last to it, spring-loaded to the leading coupling coupling, the hinge is placed with. driven half coupling.

In addition, symmetrical radial grooves for the ends of the fixing elements, the other ends of which are designed for periodic

with

Vj co

00

about

N

with

After interaction with the lateral blades, protrusions can be made on the abutment surface facing the lateral blades, and reciprocal notches can be made on the lateral blades x.

In FIG. 1 depicts a universal screwdriver in the Screwdriver mode is ordinary, general view; FIG. 2 is a section AA in FIG. 1; in FIG. 3 - universal screwdriver in Capture mode; in FIG. 4 is a section BB in FIG. 3.

A universal screwdriver comprises a hollow handle 1, in which a central blade 2 and side blades 3 are located, forming a package of blades. The central blade 2 at one end passes through the wedge to the working part of the blade, and at the other end, connect the ENB with the hinge 4 mounted in the driven coupling half 5. It also has spring-loaded locking elements 6. The driven coupling half 5 is placed in the driving coupling half 7, rigidly connected with a hollow handle 1. On the inside of the traveling coupling half 7 there are made radial recesses 8. They include the ends of the spring-loaded fixing elements 6, and their opposite ends interact with the side blades 3. The blade pack 2, 3 is covered by a stop 9. On the inside of it, protrusions 10 are made on surfaces facing the lateral blades 3, and recesses 11 are provided on the lateral blades 3. A locking roller 12 is installed on the central blade 2, which passes through the longitudinal grooves 13 of the side blades 3.

Universal screwdriver works as follows.

Preliminarily, depending on the size of the screw head, a package of blades 2 and 3 with a locking roller 12 on the central blade 2 is selected and installed in the hollow handle 1 ..: - V.. ,.

The blade pack 2 and 3 are inserted into the handle 1 and snap the central blade 2 onto the ball .nier 4..-.-: .. v; .-::

When working in the Screwdriver mode, the side blades 3 are usual (see, Figs. 1, 2) with the rid- force of the stop 9; they are pulled into the hollow handle

1, while they enter the driven coupling half 5 and push the spring-loaded locking elements 6 into the radial recesses 8 of the driving coupling half 7. Thus, the coupling halves 5 and 7 are engaged and the central blade 2 is rigidly connected to the handle 1.

When operating in the Capture mode (see Figs. 3, 4), the lateral blades 3 are pushed forward using the stop 9 (from the handle 1) and their working parts are inserted into the slot of the screw 14 (see Fig. 3). When the side blades 3 are pulled out of the handle 1, the spring-loaded locking elements 6 exit the radial recesses 8 (see Fig. 4).

For power screwing (unscrewing) the screw 14, the lateral blades 3 are removed inwardly into the handle 1, and the central blade 2 in the Screwdriver mode normally screw or unscrew the screw 14,

Claims (3)

1. A universal screwdriver, comprising a central handle, a central blade located therein, a hinge for securing the latter and side blades mounted for movement relative to the central blade, and an abutment surrounding the blades, characterized in that, in order to increase reliability it is fitted with a handle fixed the leading coupling half, the driven coupling half coaxially located in it and the fixing elements installed in the latter, spring-loaded to the driving coupling half, and the hinge is placed R driven coupling half. 2. A screwdriver according to claim 1, with the exception that symmetrical radial recesses are made on the inner surface of the drive coupling half under the ends of the fixing elements, the other ends of which are designed for periodic operation with lateral blades mi. 3. The screwdriver according to claim 1, characterized by the fact that on the side blades m abutment surfaces are made protrusions, and on the lateral blades x - reciprocal notches.