CN202018403U

CN202018403U - Stretching clamp and stretching device

Info

Publication number: CN202018403U
Application number: CN2011200278324U
Authority: CN
Inventors: 杨伟明
Original assignee: GUANGZHOU HUADE AUTOMOBILE SPRING CO Ltd
Current assignee: GUANGZHOU HUADE AUTOMOBILE SPRING CO Ltd
Priority date: 2011-01-27
Filing date: 2011-01-27
Publication date: 2011-10-26
Anticipated expiration: 2021-01-27

Abstract

The utility model discloses a stretching clamp used for clamping a spring steel wire, wherein, the stretching clamp comprises a taper hole seat and at least three clamp blocks, a taper hole is formed at the middle part of the taper hole seat, and at least the three clamp blocks are arranged in the taper hole. According to the clamping positioning principle, three-point positioning is most stable; the stretching clamp adopts the three-point clamping positioning, and is matched with the taper hole; and after the steel wire is clamped by at least the three clamp blocks, load is applied to the clamp in the two opposite direction, at least the three clamp blocks can gather inwards along the taper hole so as to clamp the spring steel wire, clamping force increases when the tensile force increases until the steel wire is snapped, and then a numerical value is read out through a relative instrument and whether the steel wire is qualified is judged. The stretching clamp and a stretching device adopt three-point positioning to fix the spring steel wire, can achieve better stability, and can effectively avoid the problem that the accuracy of the numerical value is influenced because the spring steel wire shifts during the load applying process.

Description

Stretching clamp and stretching device

Technical field

The utility model relates to a kind of stretching clamp and stretching device that spring steel wire tensile strength detects that be used for.

Background technology

Spring steel wire need carry out the tensile strength inspection before production, stretching device has two anchor clamps up and down, as depicted in figs. 1 and 2, existing anchor clamps include two circular cones 20 that place awl groove seat 10, and spring steel wire 30 is held in the circular cone, load to opposite both direction behind the clamping steel wire, draw clamping force big more more, till steel wire is broken, on instrument, read numerical value, it is qualified to judge whether.See also Fig. 2, cooperating between the existing anchor clamps sectional view, circular cone and spring steel wire is two point locations, and the location is unstable, and in loading procedure, displacement might appear in spring steel wire, thereby influences the accuracy of numerical value.

Therefore, provide a kind of firm stretching clamp in location that is used for detection springs steel wire pulling strengrth to be necessity in fact.

Summary of the invention

The purpose of this utility model is to provide a kind of firm stretching clamp of locating.

For realizing the utility model purpose, provide following technical scheme:

The utility model is used for the stretching clamp of clamp springs steel wire, is provided with the taper hole seat of taper hole in the middle of it comprises, and at least three clamps that place this taper hole.Wherein adopting three clamps is preferred plan, because according to the principle of clamping and positioning, three-point fix is the most stable, and the utility model adopts 3 clamping and positioning, cooperate conical bore, these three clamps load to opposite both direction anchor clamps after clamping steel wire, and then these three clamps inwardly draw the fastening spring steel wire in along this taper hole, draw clamping force big more more, till steel wire is broken, on relevant instrument, read numerical value then, it is qualified to judge whether.As the conversion of technical scheme, also can adopt three with upper clamping block, and realize that multiple spot steps up the location, can locate more firm equally.

This taper hole seat is established the trapezoidal right cylinder of taper hole in can one, and its profile also can be done other conversion, and same inside is provided with taper hole.This taper hole seat also can be a trapezoidal right cylinder of establishing taper hole in being become by two or above unit construction.

Preferably, these at least three clamps combine the taper shape of its profile of back for this taper hole of fitting, and form between at least three clamps through hole is arranged.

Preferably, these at least three clamps combine the trapezoidal right cylinder of its profile of back for this taper hole of fitting, and form between at least three clamps through hole is arranged.

This stretching clamp can comprise three with upper clamping block, and is same, its profile of a plurality of clamps combinations back this taper hole of also fitting, and forming between it has through hole, to place spring steel wire.

The utility model also provides a kind of stretching device, and this stretching device comprises two foregoing stretching clamps.When the spring steel wire tensile strength detects, with three-point fix, utilize the principle of tapering, make steel wire draw clamping force big more more.

The contrast prior art the utlity model has following advantage:

The utility model stretching clamp and stretching device adopt the three-point fix spring steel wire, and stability is better, have effectively avoided displacement occurring at loading procedure medi-spring steel wire, so that have influenced the problem of the accuracy of numerical value.

Description of drawings

Fig. 1 is the stretching device structural representation of existing clamp springs steel wire;

Fig. 2 is the cut-open view of A-A direction among Fig. 1;

Fig. 3 is the stretching device structural representation of the utility model clamp springs steel wire;

Fig. 4 is the cut-open view of A-A direction among Fig. 3.

Embodiment

See also Fig. 3 and Fig. 4, the stretching device that the utility model is used for the clamp springs steel wire comprises two stretching clamps at clamp springs steel wire two ends respectively, in the middle of comprising, this stretching clamp is provided with the taper hole seat 1 of taper hole (not indicating), and three clamps 2 that place this taper hole, these three clamps combine the taper shape of its profile of back for this taper hole of fitting, and forming between three clamps has through hole (not indicating), and spring steel wire 3 places this through hole.

These three clamps 2 are behind fastening spring steel wire 3, anchor clamps are loaded to opposite both direction, then these three clamps 2 inwardly draw fastening spring steel wire 3 in along the taper hole of this taper hole seat 1, draw clamping force big more more, till steel wire is broken, read numerical value then on relevant instrument, it is qualified to judge whether.

The above only is preferred embodiment of the present utility model, and protection domain of the present utility model is not limited thereto, and anyly all belongs within the utility model protection domain based on the equivalent transformation on the technical solutions of the utility model.

Claims

1. a stretching clamp that is used for the clamp springs steel wire is characterized in that, is provided with the taper hole seat of taper hole in the middle of it comprises, and at least three clamps that place this taper hole.

2. stretching clamp as claimed in claim 1 is characterized in that, these at least three clamps combine the taper shape of its profile of back for this taper hole of fitting, and forms between at least three clamps through hole is arranged.

3. stretching clamp as claimed in claim 1 is characterized in that, these at least three clamps combine the trapezoidal right cylinder of its profile of back for this taper hole of fitting, and forms between at least three clamps through hole is arranged.

4. a stretching device is characterized in that, this stretching device comprises two as each described stretching clamp of claim 1 ~ 3.