SU954200A1

SU954200A1 - Screw driver

Info

Publication number: SU954200A1
Application number: SU803229188A
Authority: SU
Inventors: Иван Васильевич Инжаков; Барыйс Ямалатдинович Газизов
Original assignee: Всесоюзный Научно-Исследовательский Институт Технологии Арматуростроения
Priority date: 1980-12-31
Filing date: 1980-12-31
Publication date: 1982-08-30

Description

(5) ОТВЕРТКА(5) SCREWDRIVER

1one

Изобретение относитс к ручному инструменту дл завинчивани (отвинчивани ) резьбовых крепежных деталей и может быть использовано при различных монтажно-сборочных работах.The invention relates to a hand tool for screwing (unscrewing) threaded fasteners and can be used in various assembly and assembly work.

Известна отвертка, содержаща стержень с руко ткой и лезвие с клинообразной кромкой, основные грани которого образуют выпуклый на всю ширину лезви участок 1.A known screwdriver comprises a rod with a handle and a blade with a wedge-shaped edge, the main faces of which form a convex portion 1 of the entire width of the blade.

Эта отвертка сложна в изготовлении , приложенный крут щий момент к головке крепежной детали вызывает ее деформацию.This screwdriver is difficult to manufacture, the applied torque to the fastener head causes it to deform.

Наиболее близкой по технической сущности к изобретению вл етс отвертка , содержаща стержень с руко ткой и лезвием. Лезвие выполнено в виде упругого клина 2J .The closest to the technical essence of the invention is a screwdriver containing a rod with a handle and a blade. The blade is made in the form of an elastic wedge 2J.

Однако данна конструкци отверт-, ки не обеспечивает надежной фиксации лезви в шлице резьбового соединени .However, this screwdriver design does not ensure reliable fixation of the blade in the slot of the threaded joint.

Цель изобретени - повышение надежности фиксации лезви с крепежной деталью.The purpose of the invention is to increase the reliability of fixing the blade with the fastener.

Поставленна цель достигаетс тем, что В отвертке, содержащей стержень с руко ткой и лезвием, на рабочей поверхности лезви выподнен по крайней мере один выступ, расположенный под углом к оси отвертки и смещенный to относительно последней.The goal is achieved by the fact that a screwdriver containing a rod with a handle and a blade has at least one protrusion on the working surface of the blade at an angle to the axis of the screwdriver and shifted to relative to the latter.

На фиг. 1 изображена отвертка в зацеплении с винтом; на фиг. 2 - раЗ рез А-А на фиг. 1; на фиг. 3 - варианты выполнени формы выступа в 15 его поперечном сечении.FIG. 1 shows a screwdriver in engagement with the screw; in fig. 2 - the cut A-A in FIG. one; in fig. 3 shows embodiments of the form of a protrusion in 15 of its cross section.

Отвертка представл ет собой стержень с руко ткой, (не показаны) и лезвием 1, на поверхности которого выполнен по крайней мере один выступ 20 2, расположенный под углом оС к оси 3 отвертки и смещен относительно ее .The screwdriver is a rod with a handle (not shown) and a blade 1, on the surface of which at least one protrusion 20 2 is made, which is located at an angle of ° C to the axis of the screwdriver and is offset relative to it.

Claims

Angle oi. should be sufficient for jamming the protrusion 2 into the recess C of the head 5 of the screw 6 provided for its placement. The form of the protrusion 2 can be semicircular, trapezoidal, rectangular (see Fig. 3), the preferred is when the longitudinal edges 7 and The 8 protrusions 2 correspond to the configuration of the walls 9 and 10 of the recess 4, with which they engage. In the latter case, provided that the gap between the parallel walls 9 and 10 of the notch k of the head 5 of the screw 6 and the width of the protrusion 2 is equal, the angle о can be equal to О. Screwdriver work as follows. To fix it on the screwdriver, the blades of the blade 1 are inserted into the slot, aligning the notch C with the protrusion 2, apply an axial force to the screwdriver and rest the end of the blade 1 into the bottom of the slot. In this case, the lower part of the wall 9 and the outer edge of the recess wall 10 parallel to it come into contact with the corresponding edges 7 and 8 of the protrusion 2, which ensures its elastic wedging. At the same time, jamming with a tension of 10 grooves of an armature 2 walls occurs at an angle cx1 equal to 0 ° and the shape of a protrusion 2 reproducing the groove k of head 5 of screw 6 filled with it. when the protrusion 2 and the notch are the mating surfaces. The fastener is then installed in the threaded hole and screwed in, then the blade 1 is pulled out of the slot with a slight effort. As the jamming portion of the protrusion 2 is worn, the blade 1 is grinded to use the non-worn portions of the protrusion 2 and to update the blade of the screwdriver. This technical solution allows to carry out assembly and assembly work in hard-to-reach places, guarantees work safety by preventing the tool from slipping in the diametrical groove of the fastener, conveniently and reliably in operation; Claims: Screwdriver, containing the core with; a handle and a blade, characterized in that, in order to increase the reliability of fixing the blade with the fastener, at least one protrusion is made on the working surface of the blade, which is angled to the axis of the screwdriver and is offset from the latter. Sources of information taken into account in the examination 1. US patent number 3923088, cl. U5-50 A, 197.

2. The patent of France W 2271903, cl. 8 25 V 15/00, 197t (prototype).