CN2325771Y

CN2325771Y - Chuck used for elongation test

Info

Publication number: CN2325771Y
Application number: CN 98204138
Authority: CN
Inventors: 傅敏; 洪友士; 杨海升
Original assignee: Institute of Mechanics of CAS
Current assignee: Institute of Mechanics of CAS
Priority date: 1998-04-29
Filing date: 1998-04-29
Publication date: 1999-06-23
Anticipated expiration: 2008-04-29

Abstract

The utility model provides a chuck used for an elongation test, comprising an upper clamping head whose upper end is processed with a screw thread part, the lower end of the upper clamping head is pivoted with a connecting piece by a shaft pin, the lower end of the connecting piece is pivoted with an upper clamping piece by a shaft pin, the lower part of the upper clamping piece is provided with a lower clamping piece, and dovetail grooves are arranged on the upper and the lower clamping pieces. The utility model has the advantages of simple structure and rapid assembly and disassembly under high temperature environment and the function of automatically regulating verticality.

Description

Novel stretching experiment anchor clamps

The utility model relates to a kind of stretching experiment anchor clamps, particularly a kind of novel stretching experiment anchor clamps.These anchor clamps are a kind ofly to carry out the anchor clamps of stretching experiment at board-like sample, and it can load by the wedge shape shoulder, be installed sample and test the device that mechanical property is used of automatic centering mode.It particularly is applicable to the tension test of the hard brittle material in the hot environment.

Existing stretching experiment anchor clamps mostly are to process screw thread earlier at the two ends of sample, are sticked in the upper/lower terminal of testing table then in the mode that is spirally connected, and carry out tension test.Adopt said method to carry out tension test, have the problem of a lot of inconveniences, such as, under hot environment, the loading and unloading inconvenience of its sample, its maximum shortcoming is, hard brittle material, the particularly test of board-like hard brittle material are difficult to make, at first board-like sample is difficult for being processed at two ends the shape of screw thread, even after being processed into screw-like, because of the vertical error of testing table itself or the vertical error of sample two ends screw thread, also can in test sample be twisted off, and can't carry out tension test sample.

The purpose of this utility model is to provide a kind of novel stretching experiment anchor clamps, and it can adjust verticality and being installed to board-like sample easily automatically.

Another purpose of the present utility model is to provide a kind of novel stretching experiment anchor clamps, and it can be used for the stretching experiment under the hot environment.

A kind of novel stretching experiment anchor clamps of the utility model, comprising having: a upper chuck, the bottom of upper chuck and web member articulate with a pivot pin; The bottom of web member and upper fastener articulate with a pivot pin; There is a lower fastener below of corresponding upper fastener; Wherein two pivot pins that are articulated with upper chuck and upper fastener on this web member are for axially vertical; Wherein an end of upper chuck and lower fastener is processed with a threaded portion respectively; Wherein on upper fastener and lower fastener, be processed with swallow tail shaped slot respectively.

For further specifying feature of the present utility model and effect, below in conjunction with the accompanying drawings the utility model is further described now, wherein:

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

Fig. 2 is the sectional view of A-A direction among Fig. 1.

See also Figure 1 and Figure 2, be structural representation of the present utility model.Comprising a upper chuck 1 is arranged, its upper end (direction as shown) is processed with threaded portion 11, and the lower end is a plate body 12, and a circular hole 13 is arranged in the centre of plate body 12; A connection piece 3, its top and bottom have without exception the groove 31 like U-shaped, and the direction of this two U-shapeds groove 31 be axially not vertically, and respectively have an axis hole 32 at two walls of upper and lower U-shaped groove 31; This upper chuck 1 is articulated in the last U-shaped groove 31 of web member 3 by a pivot pin 2, in the following U-shaped groove 31 of web member 3, be articulated with a upper fastener 4 with pivot pin 2, upper fastener 4 is general like rectangular plate shape, the front of this upper fastener 4 (direction shown in Figure 1) has a swallow tail shaped slot 41, and the opening of this swallow tail shaped slot 41 down; One lower fastener, 7, one ends direction (direction among the figure) down are processed with threaded portion 71, and the other end is a plate body 73, have a swallow tail shaped slot 72 on the plate body 73 of lower fastener 7, and its opening up; The shape size of the swallow tail shaped

slot

41,72 of this upper fastener 4 and lower fastener 7 is the same, and direction is relative; Two pivot pins 2 that wherein are articulated with upper chuck 1 and upper fastener 4 on this web member 3 are for axially vertical.

The course of work of the present utility model is: the threaded portion 11 with upper chuck 1 one ends (is prior art with test machine for mechanism earlier, be not described in detail at this) the upper end bolt, and be articulated with web member 3 at the axis hole 13 usefulness pivot pins 2 of the lower end of upper chuck 1 plate body 12, be articulated with upper fastener 4 in the lower end of web member 3 with pivot pin 2; Again the threaded portion 71 of lower fastener 7 is screwed onto the bottom of test machine for mechanism, and the direction of swallow tail shaped

slot

41,72 that will this upper and

lower fastener

4,7 is adjusted consistent, the distance of its two upper and

lower fasteners

4,7 is decided on the size of sample, the two ends of the sample 6 that will process in advance then (this is a prior art) place the swallow tail shaped

slot

41,72 of upper and

lower fastener

4,7, also be processed with the lug boss 61 of swallow-tail form because of the two ends of sample 6, therefore can be just be complementary, can carry out tension test at this moment with the swallow tail shaped

slot

41,72 of upper and

lower fastener

4,7.

If the upper and lower relatively

fastener

4,7 of sample 5 is hour, can in the swallow tail shaped

slot

41,72 of upper and

lower fastener

4,7, put a contiguous block 5, the profile of this contiguous block 5 is slightly less than the size of the swallow tail shaped

slot

41,72 of upper and

lower fastener

4,7, and on contiguous block 5 swallow tail shaped slot 51 approaching of processing with lug boss 61 shapes of the swallow-tail form at sample two ends; By above-mentioned structure, can carry out tension test to sample 6 equally.

The part at the utility model sample 6 two ends can be changed mutually, just upper chuck 1, web member 3 and upper fastener 4 can be contained in the position of lower fastener 7, lower fastener 7 is contained in the position of upper chuck 1, also can adopts in sample 6 lower ends and also install structure with web member 3.

Upper chuck 1 in the utility model, web member 3, upper fastener 4, lower fastener 7 and contiguous block 5 are exotic material and make.

The utility model compared with prior art has following advantage:

One, because of its structures that adopted two pivot pins to connect, thus can automatically adjust its sample about Perpendicularity, and prevent the fracture of sample.

Two, adopt again the structure of dovetail groove because of it, Fast Installation that can be under hot environment, thereby Solved the problem of at high temperature experiment loading and unloading.

Claims

1. novel stretching experiment anchor clamps is characterized in that, comprising having:

One upper chuck, the bottom of upper chuck and web member articulate with a pivot pin;

The bottom of web member and upper fastener articulate with a pivot pin; There is a lower fastener below of corresponding upper fastener.

2. by the described a kind of novel stretching experiment anchor clamps of claim 1, it is characterized in that wherein two pivot pins that are articulated with upper chuck and upper fastener on this web member are for axially vertical.

3. by the described a kind of novel stretching experiment anchor clamps of claim 1, it is characterized in that wherein an end of upper chuck and lower fastener is processed with a threaded portion respectively.

4. by the described a kind of novel stretching experiment anchor clamps of claim 1, it is characterized in that, wherein on upper fastener and lower fastener, have swallow tail shaped slot.