CN2199012Y

CN2199012Y - Automatic positioning wrench

Info

Publication number: CN2199012Y
Application number: CN 94241824
Authority: CN
Inventors: 汪利平; 吴文毅
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-05-09
Filing date: 1994-05-09
Publication date: 1995-05-31
Anticipated expiration: 2004-05-09

Abstract

The utility model relates to an automatic positioning wrench which comprises a handle 1, a hexagonal sleeve 2, and a pin shaft 3, wherein, the hexagonal sleeve 2 is movably fixed on the working end of the handle by the pin shaft 3; the working end of the handle is the involute of a base circle which takes the shaft center of the pin shaft as the centre of the circle; the working end of the handle 1 forces to a screwed cap 7 through the hexagonal through hole 4 of the hexagonal sleeve 2; a three-way gapless clamp is formed. The utility model which combines the advantages of an existing wrench has the advantage of simple structure.

Description

Automatic positioning wrench

The utility model relates to hand tools, is in particular a kind of automatic dowelled spanner.

At present, monkey wrench that people habitually practise uses inconvenient, and is easily loosening and cause poor rigidity in the work.And the back-up wrench size is single, and accommodation is little.

The purpose of this utility model just provides a kind of collection monkey wrench, back-up wrench advantage automatic dowelled spanner for the above-mentioned defective that overcomes prior art.

Technical solution of the present utility model is as follows:

A kind of automatic dowelled spanner, it includes handle, the hexagonal cover, bearing pin, hexagonal has put hexagonal through hole in, each angle of hexagonal through hole is 120 degree, the part outside at the hexagonal cover has the circuit that links with the hexagonal through hole, the working end of handle links by bearing pin and hexagonal cover and just is inserted in this circuit, and act on nut by the hexagonal through hole application of force, the axle center with bearing pin that is shaped as of the working end working face of handle is the involute of basic circle, the hexagonal symmetry axis of hexagonal through hole and basic circle center of circle off-centre 1/2nd base circle diameter (BCD)s.

Advantage of the present utility model is and back-up wrench, box spanner is compared its good rigidly, the working face non-loosening, vary in size, applied widely, compare with the general activity spanner, kept its size variable, the advantage of applied range, and easy to use has realized that to six square nuts three-dimensional do not have the gap clamping.

The utility model will be further described below in conjunction with accompanying drawing:

Fig. 1 is the utility model structural representation.

Fig. 2 is the A-A profile of Fig. 1.

As Fig. 1-shown in Figure 2, during the utility model work, the working end of handle 1 is inserted in the circuit 5 of hexagonal cover 2, and their activities are fixed together by bearing pin 3, when hexagonal is overlapped 2 hexagonal through holes and is entangled six square nuts 7, clockwise direction is moved handle, then on the hexagonal cover 2 on two inclined-planes and the handle 1 point formed and respectively become the three-dimensionals of 120 degree not have the gap clamping six square nuts, 1 pair on handle arbitrarily the pressure point of six square nuts 7 of size all on six sides' the axis of symmetry.This clamping force increases along with the increase of working resistance, and six square nuts are screwed along with the rotation of handle 1, does not tightly sting bad six sides, the phenomenon that can't screw thereby overcome other spanner because of the gap clamping.If will oppositely screw, only need spanner is turned over turnback, entangle hexagonal (hexagon)nut 7 and counterclockwise pull handle and get final product, long under short on hexagonal through hole 4 axis, to adapt to the needs of different size.The hexagonal cover 2 of another different size also can be installed, to enlarge its scope of application at the other end of handle 1.

Claims

1, a kind of automatic dowelled spanner, it includes handle 1, hexagonal cover 2, bearing pin 3, it is characterized in that on the hexagonal cover 2 hexagonal through hole 4 in being arranged, each angle of hexagonal through hole 4 is 120 degree, the part outside at hexagonal cover 2 has the circuit 5 that links with hexagonal through hole 4, the working end of handle 1 links by bearing pin 3 and hexagonal cover 2 and is inserted in this circuit 5, and act on nut 7 by hexagonal through hole 4 application of forces, the axle center with bearing pin 3 that is shaped as of the working end working face of handle 1 is the involute of basic circle, the hexagonal symmetry axis of hexagonal through hole 4 and basic circle center of circle off-centre 1/2nd base circle diameter (BCD)s.