SU1313604A1 - Tap wrench - Google Patents

Abstract

The invention relates to the field of machine tools, tooling, in particular to devices for threading taps of various sizes. The aim of the invention is to improve the reliability of fixing the tool shank. The tapping device comprises a body 1 with handles 2, a conical hole 3 is made in the body. In the hole 3, there are movable prisms 5 in the form of one-sided wedges in which the through longitudinal grooves 6 are made parallel to the inclined surfaces of the wedges. In case 1, fingers are installed through slots 6. Between themselves, the prisms 5 are connected by a flat spring 8, mounted and fixed by the ends in the recesses 9, made in the prisms from the side opposite to their working part. Curved part of the spring 8 is directed towards the working part of the prism. 3 il. X er: with ZfS FIG. 2

Description

The invention relates to a machine tool industry, in particular to tools for threading taps of various sizes.

The purpose of the invention is to increase the reliability of fixing the tool shank.

FIG. 1 shows the knob in the position where the tool with the smaller diameter of the shank is clamped, general view; in fig. 2 - the same, in the position in which the clamped tool with a large diameter shank; in fig. 3 - knob, top view.

The collar includes a housing 1 with handles 2. A conical bore 3 with conical surfaces 4 is made in the casing. In the opening 3, there are movable prisms 5 in the form of one-side wedges in which the through longitudinal grooves 6 are made parallel to the inclined surfaces of the wedges. 1, fingers 7 are mounted through grooves 6. Between the prisms 5, they are connected by a flat spring 8, mounted and fixed with their ends in special notches 9, made in the prisms from the side opposite to their working part. Curved part of the spring 8 is directed towards the working part of the prism.

The operation of the crank is carried out as follows.

Under the influence of the flat spring 8, the prisms 5 are installed on the largest size of the square of the tap shank. Then the knob is worn

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on the shank of the tap inserted into the cut hole and press on the body 1 of the knob. At the same time, the end of the square part of the shank rests on the curved part of the spring plate and the prisms begin to compress simultaneously, moving the grooves 6 along the fingers 7 to fully cover the square of the tap 10. The spring automatically ensures that the tap enters the working zone of the prisms only by the square part depending on the frame size taps. After the square has been completely crimped with a prism, the knob is turned by the handles 2 and the threads are cut.

Claims (1)

Invention Formula A collar containing clamping prisms with working surfaces placed in a quadrangular opening of the housing, the opposite planes of which are angled to each other, while the prisms are mounted for simultaneous movement along said inclined planes and are connected between placed in a groove of a prism, characterized in that, in order to increase the reliability of fixing the tool shank, the connecting element is made in the form of a flat spring, the part of which is curved is directed towards the working surfaces are prisms and designed to interact with the end of the tool shank. FIG. Editor A. Ogar Compiled by M, Black Tehred L. Oliynyk Order 2163/13 Circulation 976 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 ut.3 Corrector S.Cherni