CN2305276Y

CN2305276Y - Connector for tool lenthening bar

Info

Publication number: CN2305276Y
Application number: CN 97250621
Authority: CN
Inventors: 谢智庆
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-08-12
Filing date: 1997-08-12
Publication date: 1999-01-27
Anticipated expiration: 2007-08-12

Abstract

The utility model relates to a connecting device for a tool lengthening bar, which is composed of a wrenching bar, a lengthening bar, a sleeve pipe, and C-shaped rings, wherein, more than one ring slot is arranged on excircles of the front and the back ends of the lengthening bar; elasticity is clamped in the ring slot; the C-shaped rings are respectively inserted in the wrenching bar and a concave ring slot in a sheathing hole of the sleeve pipe for completing nested connection. The utility model is used for replacing the connecting structure of a steel ball, which has a complex technology. The utility model has the advantages of simple manufacture technology, few parts, easy assembly, low cost, and convenient operation, and has the advantage that the use habits of users do not need to be changed.

Description

Instrument extension bar jockey

A kind of instrument extension bar jockey, it is the extension bar syndeton device of hand-held tool plate stem.

Known hand-held tool plate stem often utilizes lever principle to come extension box length, reaches the labour-saving purpose.Tommy bar commonly used is to adopt by tommy bar and sleeve pipe grafting to form, connection between them is to adopt shown in accompanying drawing 2-4, its structure is to be shaped on steel ball or snag axis on tommy bar A termination, and by the compression spring hold on self outer rim, the sleeve pipe of sleeve pipe B connects the pit that the inboard, hole is shaped on corresponding steel ball or snag axis, after their are pegged graft, the steel ball of pressurized or snag axis are sprung into just form clip in the pit and fix.When desire is separated tommy bar with sleeve pipe a little power can make steel ball or snag axis pressurized, shorten the separation of deviating from pit, this structure is more convenient in the use, but because steel ball or snag axis all are to adopt the mode of burying to bury processing in the tommy bar endoporus, thereby difficulty is bigger in the technology manufacturing, production cost is higher, becomes difficult problem in the instrument manufacturing.

The purpose of this utility model is to propose a kind of annular groove that is shaped on extension box, and nested elasticity C shape is encircled and replaced known ball type snag axis above it, reaches simplified manufacturing technique, reduces production costs.

The utility model realizes that in the following way the wrenching bar rear end is for shaking hands, and front end is a sleeve joint hole, is shaped on the spill annular groove that is complementary with extension bar annular groove position on the inwall of hole; Be shaped on horizontal annular groove more than two on the cylindrical of extension bar front end termination, except that the interior annular groove degree of depth was more shallow, other each annular groove degree of depth were identical, and the rear end is shaped on two annular grooves, and an all nested cross section is an Elastic Cylindrical C shape ring in each annular groove; Be shaped in the sleeve joint hole of sleeve pipe tail end with the extension bar front end and be complementary and corresponding two spill annular grooves, the extension bar rear end is plugged in the sleeve joint hole of wrenching bar, and the heavy just seat of C shape ring is in corresponding recessed annular groove; The extension bar front end is plugged in the sleeve joint hole of sleeve pipe the heavy seat of C shape ring in recessed annular groove, but its interior C shape ring is stuck on the end face of sleeve pipe tail end just.

The advantage that this utility model has is, makes to produce that to go up technology very simple, and it has reduced parts, easily assembled, easy to use, does not change user's custom, has reduced production cost

Description of drawings:

Accompanying drawing 1, the utility model axonometric exploded view

Accompanying drawing 2, existing instrument extension bar ball type structure chart

Accompanying drawing 3, existing instrument extension bar projection shaft type structure chart

Accompanying drawing 4, existing instrument lengthening rod-type structure chart

In conjunction with the accompanying drawings a kind of instrument extension bar of the utility model jockey is described in further detail below by embodiment: it is made up of wrenching bar, extension bar, sleeve pipe and C shape ring, cylindricality wrenching bar 2, the rear end is for shaking hands, front end is a sleeve joint hole 21, be shaped on the inner round wall of hole and annular groove position, the extension bar l rear end corresponding recessed annular groove 212 that is complementary, 211, be shaped on more than two on the extension bar 1 front end termination cylindrical, and present embodiment is made 3 horizontal

annular grooves

11,12,13, except that the degree of depth of interior annular groove 13 grooves was more shallow, other each annular groove degree of depth were identical.The extension bar rear end is shaped on two

annular grooves

14,15, an all nested cross section is cylindrical in each annular groove of extension bar front and back, its internal diameter is slightly less than the extension bar external diameter, its external diameter is slightly less than the elasticity C shape ring 111,121,131,141,151 of the spill groove bottom diameter of sleeve joint hole, is shaped on the spill annular groove that is complementary with the extension bar front end in the sleeve joint hole 31 of sleeve pipe 3 tail ends.When the extension bar rear end being plugged in the sleeve joint hole 21 of wrenching bar 2, the C shape ring 151,141 of pressurized, heavy just seat is in because of the recessed annular groove 211,212 that pressurized is not loose naturally.Connect and constitute chucking.The C shape ring 111,121 of preceding two pressurizeds entered in the spill annular groove, embeds in the spill annular groove because of pressurized is not loose naturally when its front end was plugged in the sleeve joint hole 31 of sleeve pipe 3.But first C shape ring 131 is blocked on the port of sleeve pipe sleeve joint hole 31 just owing to more shallow can not the contraction of the annular groove degree of depth.The clip of having finished the instrument extension bar connects.The front end of sleeve pipe 3 can snap in the plate mouth of need of work size.

Claims

A kind of instrument extension bar jockey, it is by wrenching bar, C shape ring, sleeve pipe is formed, it is characterized in that: wrenching bar (2) rear end is to be shaped on the spill annular groove (212) that is complementary with extension bar annular groove position on the inwall of sleeve joint hole (21) hole for the front end of shaking hands, (211), be shaped on three horizontal annular grooves (11) (12) (13) on the cylindrical of extension bar (1) front end termination, except that the interior annular groove (13) degree of depth is more shallow, other each annular groove degree of depth are identical, the rear end is shaped on two annular grooves (14) (15), and an all nested cross section is Elastic Cylindrical C shape ring (111) (121) (131) (141) (151) in each annular groove; Be shaped in the sleeve joint hole (31) of sleeve pipe (3) tail end and extension bar front end coupling and relative spill annular groove, the extension bar rear end is plugged in the sleeve joint hole (21) of wrenching bar, and the heavy just seat in C shape ring (151) (141) be in corresponding recessed annular groove.