CN201079940Y

CN201079940Y - Telescopic box spanner extension rod

Info

Publication number: CN201079940Y
Application number: CNU200720102511XU
Authority: CN
Inventors: 贾亚利; 石振鹏; 王学儒
Original assignee: Hebei Construction Group Corp Ltd
Current assignee: Hebei Construction Group Corp Ltd
Priority date: 2007-09-17
Filing date: 2007-09-17
Publication date: 2008-07-02
Anticipated expiration: 2017-09-17

Abstract

The utility model relates to a telescopic type socket wrench extension rod, which belongs to the mechanical maintenance tool technology field, and is used for solving the length adjusting problem of the socket wrench in the maintenance and assembly work. The utility model adopts the technical proposal that the telescopic type socket wrench extension rod is composed of a plurality of mutually nested sockets, an external spline is arranged on the outer surface of the front socket of two adjacent sockets, an internal spline is arranged on the internal surface of the rear socket, the external spline and the internal spline are mutually meshed, and matched in a sliding way, a square head is arranged at the front end of the socket with the minimum extension rod diameter value, and a square hole is arranged at the rear end of the socket with the maximum diameter value. The extension rod length of the utility model can be adjusted according to the working requirements, to perform the operation of screwing down and loosening to bolts and nuts, etc. in any situation. The utility model has the advantages of reasonable design, simple production, and easy operation, thereby being an auxiliary tool for maintenance with very strong practicability.

Description

A kind of telescopic sleeve spanner connecting rod

Technical field

The utility model relates to a kind of telescopic sleeve spanner connecting rod, belongs to the mechanical maintenance tool in use technical field.

Background technology

In flight-line maintenance, Automobile Service and various assembly work, often need to use box spanner to come operation is tightened and unscrewed to bolt, nut etc., but its extension bar length of existing box spanner is generally fixed, can't adjust its length, but and in Automobile Service and assembly work often because the limitation in operating area and space and some other cause specific require the adjustable length of extension bar, the often influence production because length is not moderate of traditional extension bar, this just needs a kind of telescopic sleeve spanner connecting rod that can adjust length in a hurry.

Summary of the invention

Technical problem to be solved in the utility model provide a kind of in flight-line maintenance, Automobile Service and assembly work the telescopic sleeve spanner connecting rod of conveniently adjusted length.

The technical scheme that solves the problems of the technologies described above is:

A kind of telescopic sleeve spanner connecting rod, it is made up of the mutual socket of more piece sleeve, is spline fitted between the adjacent two joint sleeves, and the front end of the joint sleeve that the footpath value is minimum is square toes, and the rear end of the joint sleeve that the footpath value is maximum is provided with square hole.

Above-mentioned telescopic sleeve spanner connecting rod, described sleeve are 3 joints, and the 1st joint sleeve 2 is solid, and the 2nd, 3 joint sleeves are hollow; Square hole piece 5 is equipped with in rear end at the 3rd joint sleeve 4, and the internal spline of square hole piece 5 and the 3rd joint sleeve 4 is a secure fit, and the square hole piece is provided with square hole.

Above-mentioned telescopic sleeve spanner connecting rod, in the spline fitted of described sleeve, the outer end of external splines all has the tapering of a segment length, and external splines is for being slidingly matched in the corresponding sleeve; Other end external splines does not have tapering, and external splines is a secure fit in the sleeve corresponding with it.

Adopt the box spanner extension bar of this structure, can adjust the length of sleeve extension rod flexibly, can under various narrow space occasions, implement to tighten, unscrew operation bolt, nut according to need of work.Rational in infrastructure, the processing ease of the utility model is the very strong maintenance aid of a kind of practicality.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the right view of Fig. 1.

Mark is as follows among the figure: square toes 1, first segment sleeve 2, the second joint sleeve 3, the 3rd joint sleeve 4, square hole piece 5.

The specific embodiment

Show among the figure that the utility model mainly is made up of sleeve and a square hole piece that more piece has a spline.First segment sleeve foremost is solid, has only external splines, and at its head a cross section being arranged is foursquare square toes, and its effect is to be connected with corresponding wrench socket; All the other sleeves are hollow, wherein not only have internal spline but also have external splines on Zhong Jian the sleeve, and the wide center line coincidence of spline key in twos on the correspondence position in the interior external splines; The final section sleeve has only internal spline, be embedded with a square hole piece in its end, it is trapezoidal cylindric that the appearance of square hole piece is, also have external splines at less periphery, the internal spline of this spline and this sleeve constitutes secure fit, have a foursquare square hole on the front end face of square hole piece, the effect of this square hole also is to be connected with corresponding wrench socket.

The external splines of every joint sleeve can be divided into be slidingly matched part and secure fit part, and the external splines of the part that is slidingly matched is provided with very little tapering, and the sleeve internal spline corresponding with it is for being slidingly matched.The external splines of secure fit part does not have tapering, and the internal spline of the sleeve corresponding with it is a secure fit.When so in use pulling out sleeve extension rod forward, slipper is because there is tapering, and is to be slidingly matched, and is easy to pull out.When moving the secure fit part to, this part does not have tapering with the internal spline of corresponding sleeve, and is secure fit, and can guarantee between the sleeve not can slippage and make enough spline contact lengths are arranged between two sleeves, to transmit torsion.

An embodiment of the present utility model is as follows:

With a diameter is that 20mm, length are that the solid-iron cylinder of 165mm is made the first segment sleeve, and the one end is the square toes that the cross section is the 12mm length of side, long 15mm, has the external splines of long 150mm on its surface, and the spline specification is " 6 * 16 * 20 "; With a diameter is 28mm, length is that the cylindrical iron of 150mm is made second sleeve, earlier therein the heart along the axis direction circular hole that to open a basic size be 16mm, pulling out specification more within it on the outer surface vertically respectively is that internal spline and the specification of 150mm is the external splines of 150mm for " 6 * 23 * 28 ", length for " 6 * 16 * 20 ", length, and wherein the wide center line of key of Dui Ying two interior external splines coincides.With a diameter is 32mm, and length is that the cylindrical iron of 170mm is made the 3rd joint sleeve, and earlier the heart is along the axis direction circular hole that to open a basic size be 23mm therein, and the surface is pulled out specification and is " 6 * 23 * 28 " within it again, and length is the internal spline of 170mm.With a diameter is 32mm, and length is that the cylindrical iron of 25mm is made the square hole piece, and leave a 12mm length of side, the degree of depth is the square hole of 17mm, car goes out the step of " Φ 28-Φ 32 " again, its length is 20mm.Make on its surface with the corresponding specification of the 3rd joint sleeve and be " 6 * 23 * 28 ", longly be the external splines of 20mm, and be inserted into the 3rd joint overlap in secure fit with it.

In above-mentioned three sleeves, the spline effective length of being opened on first, second joint sleeve is 150mm, and the effective length of spline is 170mm in the 3rd joint sleeve, wherein has 20mm to be used for forming secure fit with the square hole piece.The longest effective active length of extension bar is 460mm, and the shortest effective active length is 190mm.

Produce slippage in order to prevent to pull out sleeve extension rod, there is a very little tapering in first and second 135mm length that saves the outer end of external splines of sleeve, the spline of all the other 15mm length of the other end is not then established tapering, so that guarantee between each sleeve not can slippage and guarantee in twos between the sleeve spline contact length of the rarest 15mm.

Claims

1. telescopic sleeve spanner connecting rod, it is characterized in that: it is made up of the mutual socket of more piece sleeve, be spline fitted between the adjacent two joint sleeves, and the front end of the joint sleeve that footpath value is minimum is square toes, and a rear end of saving sleeve of footpath value maximum is provided with square hole.

2. telescopic sleeve spanner connecting rod according to claim 1 is characterized in that: described sleeve is 3 joints, and the 1st joint sleeve [2] is solid, and the 2nd, 3 joint sleeves are hollow; Square hole piece [5] is equipped with in rear end at the 3rd joint sleeve [4], and the internal spline of square hole piece and the 3rd joint sleeve [4] is a secure fit, and the square hole piece is provided with square hole.

3. telescopic sleeve spanner connecting rod according to claim 1 and 2 is characterized in that: in the spline fitted of described sleeve, the outer end of external splines all has the tapering of a segment length, and external splines is for being slidingly matched in the corresponding sleeve; Other end external splines does not have tapering, and external splines is a secure fit in the sleeve corresponding with it.