CN210741998U

CN210741998U - Clamp suitable for torsion fatigue test of samples of various specifications

Info

Publication number: CN210741998U
Application number: CN201921714522.2U
Authority: CN
Inventors: 宋一兴
Original assignee: Changchun Qianbang Test Equipment Co ltd
Current assignee: Changchun Qianbang Test Equipment Co ltd
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2020-06-12
Anticipated expiration: 2029-10-14

Abstract

The utility model relates to a clamp suitable for torsion fatigue test of multiple specification samples, including two clamp bodies that set up relatively, namely first clamp body and second clamp body, the first clamp is connected with the swing cylinder and is regarded as the active end, the second clamp body is fixed to the support through bloated tight cover and torque sensor and is regarded as the stiff end, two clamp bodies clamp the sample together and accomplish the torsion fatigue test; the fixture body adopts a piston type oil cylinder structure and comprises a cylinder body and a piston rod, the front end of the cylinder body is provided with an opening, the front end of the piston rod is connected with a pair of clamping blocks and moves inside and outside the opening of the cylinder body passively, when the cylinder body is displaced axially along the piston rod under the action of high-pressure hydraulic oil, the openings of the clamping blocks are reduced or increased, so that a sample is clamped or loosened, and the clamping blocks clamp the sample to rotate in a positive and negative swing angle along with the fixture body under the driving of the swing cylinder. The clamp has the advantages that the clamp blocks are convenient to replace, the labor intensity and the production cost are reduced, and the production efficiency is improved.

Description

Clamp suitable for torsion fatigue test of samples of various specifications

Technical Field

The utility model relates to an anchor clamps, concretely relates to anchor clamps suitable for multiple specification sample torsion fatigue test.

Background

The universal material sample for the torsional fatigue test is a bar with different diameters, the clamping of the bar sample in the market is realized by adopting an expansion sleeve mode at present, and the corresponding expansion sleeve is replaced aiming at the samples with different diameters.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an anchor clamps suitable for multiple specification sample twists reverse fatigue test. The clamp has the advantages that the clamp blocks are convenient to replace, the labor intensity and the production cost are reduced, and the production efficiency is improved.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a clamp suitable for torsion fatigue tests of samples of various specifications comprises two clamp bodies which are oppositely arranged, namely a first clamp body and a second clamp body, wherein the first clamp body is connected with a swing cylinder to serve as an active end, the second clamp body is fixed to a support through an expansion sleeve and a torque sensor to serve as a fixed end, and the two clamp bodies jointly clamp the samples to complete the torsion fatigue tests; the fixture body adopts piston cylinder structure, including cylinder body and piston rod, cylinder body front end opening, a pair of clamp splice is connected to the piston rod front end, the clamp splice passes through the piston rod and moves about inside and outside the cylinder body opening passively, when the cylinder body takes place axial displacement along the piston rod under the effect of high-pressure hydraulic oil, the opening of a pair of clamp splice will reduce or increase to press from both sides tightly or loosen the sample, the clamp splice presss from both sides the sample and makes positive and negative pivot angle rotation along the fixture body under the drive of swing cylinder.

Furthermore, a guide sleeve and a positioning pin for preventing the cylinder body and the piston rod from rotating relatively are arranged between the piston rod and the cylinder body.

Furthermore, the rear end of the clamp body is buckled with a positioning end cover.

Furthermore, the rear end of the piston rod penetrates through the supporting seat and then is connected with the swing cylinder through the diaphragm type coupler, and the swing cylinder rotates in a positive and negative swing angle to drive the piston rod to rotate, namely the clamp body rotates in the positive and negative swing angle.

Furthermore, two pairs of bearings are arranged in the supporting seat, and one end of the piston rod penetrates through the bearings to be connected with the diaphragm type coupling.

Furthermore, the clamping block is connected to the front end of the piston rod through a screw and a spring, and the clamping block slides in a guide groove at the front end of the cylinder body under the driving of the cylinder body and is reset through the restoring force of the spring.

Furthermore, one surface of the clamping block, which is opposite to the clamping surface, is an inclined surface, and the inclined surface of the clamping block is in friction fit with the inclined surface of the guide groove.

Furthermore, the section of the clamping surface of the clamping block is V-shaped.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides an anchor clamps suitable for multiple specification sample twists reverse fatigue test adopts piston cylinder drive clamp splice to press from both sides tightly or loosen the sample, can be equipped with multiunit V type clamp splice according to the sample of not unidimensional scope, and the centre gripping scope of every group clamp splice depends on the axial displacement volume of the relative piston rod of cylinder in the anchor clamps body, and it can be experimental according to the simple change clamp splice of sample size, and easy operation has reduced intensity of labour and manufacturing cost, has improved production efficiency.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to these drawings.

FIG. 1 is a front view of the clamp suitable for torsional fatigue tests of samples with various specifications;

FIG. 2 is a non-cross-sectional view of the clamp body of the present invention;

fig. 3 is a side view of the clamp block of the present invention;

FIG. 4 is a front view of the clamp block of the present invention;

figure 5 is a side view of the piston rod of the first clamp body of the present invention;

fig. 6 is a front view of the piston rod of the first gripper body of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described with reference to the accompanying drawings:

the clamp suitable for the torsional fatigue tests of the samples with various specifications shown in fig. 1-6 comprises two oppositely arranged clamp bodies, namely a first clamp body and a second clamp body, wherein the first clamp body is connected with a swing cylinder 10 to serve as an active end, the second clamp body is fixed to a support 14 through an expansion sleeve 12 and a torque sensor 13 to serve as a fixed end, and the two clamp bodies clamp the samples together to complete the torsional fatigue tests; the fixture body adopts piston cylinder structure, including cylinder body 2 and piston rod 3, 2 front end openings of cylinder body, a pair of clamp splice 1 is connected to 3 front ends of piston rod, clamp splice 1 is inside and outside 2 openings of cylinder body through the passive activity of piston rod 3, and when cylinder body 2 took place axial displacement along piston rod 3 under the effect of high-pressure hydraulic oil, the opening of a pair of clamp splice 1 will reduce or increase to press from both sides tightly or loosen sample 11, clamp splice 1 presss from both sides sample 11 and follows the fixture body and do positive and negative swing angle rotation under the drive of swing cylinder 10.

Preferably, a guide sleeve 4 and a positioning pin 5 for preventing the cylinder 2 and the piston rod 3 from rotating relatively are arranged between the piston rod 3 and the cylinder 2. The rear end of the clamp body is buckled with a positioning end cover 6.

The rear end of the piston rod 3 penetrates through the supporting seat 7 and then is connected with the oscillating cylinder 10 through the diaphragm type coupler 9, and the oscillating cylinder 10 rotates in a positive and negative oscillating angle to drive the piston rod 3 to rotate, namely the clamp body rotates in the positive and negative oscillating angle. Two pairs of bearings 8 are arranged in the supporting seat 7, one end of the piston rod 3 penetrates through the bearings 8 to be connected with the diaphragm type coupling 9, the bearings 8 are used for increasing the supporting length of the rear end of the piston rod 3, so that the clamp body is prevented from sagging under the action of self weight, and the coaxiality of a clamped sample 11 is ensured to be basically unchanged.

The clamping block 1 is connected to the front end of the piston rod 3 through a screw 15 and a spring 16, and the clamping block 1 slides in a guide groove 17 at the front end of the cylinder body 2 under the driving of the cylinder body 2 and is reset through the restoring force of the spring 16. The opposite side of the clamping block 1 and the clamping surface is an inclined surface, and the inclined surface of the clamping block 1 is in friction fit with the inclined surface of the guide groove 16. The section of the clamping surface of the clamping block 1 is V-shaped. The clamping blocks 1 are provided with a plurality of groups of V-shaped clamping blocks, the clamping range of each group of clamping blocks 1 depends on the axial displacement of the cylinder body 2 relative to the piston rod 3 in the clamp body, and the test can be carried out by simply replacing the clamping blocks 1 according to samples with different size ranges.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides an anchor clamps suitable for multiple specification sample twists reverse fatigue test which characterized in that: the test fixture comprises two oppositely arranged fixture bodies, namely a first fixture body and a second fixture body, wherein the first fixture body is connected with a swing cylinder (10) to serve as an active end, the second fixture body is fixed to a support (14) through an expansion sleeve (12) and a torque sensor (13) to serve as a fixed end, and the two fixture bodies jointly clamp a test sample to complete a torsional fatigue test; the anchor clamps body adopts piston hydro-cylinder structure, including cylinder body (2) and piston rod (3), cylinder body (2) front end opening, a pair of clamp splice (1) is connected to piston rod (3) front end, clamp splice (1) through piston rod (3) passive activity in cylinder body (2) opening inside and outside, when cylinder body (2) take place axial displacement along piston rod (3) under the effect of high-pressure hydraulic oil, the opening of a pair of clamp splice (1) will reduce or increase to press from both sides tight or loosen sample (11), clamp splice (1) and press from both sides sample (11) and follow the clamp body and do positive and negative pivot angle rotation under the drive of swing cylinder (10).

2. The clamp suitable for the torsional fatigue test of samples with various specifications as claimed in claim 1, wherein: and a guide sleeve (4) and a positioning pin (5) for preventing the cylinder body (2) and the piston rod (3) from rotating relatively are arranged between the piston rod (3) and the cylinder body (2).

3. The clamp suitable for the torsional fatigue test of samples with various specifications as claimed in claim 1, wherein: the rear end of the clamp body is buckled with a positioning end cover (6).

4. The clamp suitable for the torsional fatigue test of samples with various specifications as claimed in claim 1, wherein: the rear end of the piston rod (3) penetrates through the supporting seat (7) and then is connected with the swing cylinder (10) through the diaphragm type coupler (9), and the swing cylinder (10) rotates in a positive and negative swing angle to drive the piston rod (3) to rotate, namely, the clamp body rotates in the positive and negative swing angle.

5. The clamp suitable for the torsional fatigue test of samples with various specifications as claimed in claim 4, wherein: two pairs of bearings (8) are arranged in the supporting seat (7), and one end of the piston rod (3) penetrates through the bearings (8) to be connected with the diaphragm type coupler (9).

6. The clamp suitable for the torsional fatigue test of samples with various specifications as claimed in claim 1, wherein: the clamping block (1) is connected to the front end of the piston rod (3) through a screw (15) and a spring (16), and the clamping block (1) slides in a guide groove (17) at the front end of the cylinder body (2) under the driving of the cylinder body (2) and is reset through the restoring force of the spring (16).

7. The clamp suitable for the torsional fatigue test of samples with various specifications as claimed in claim 6, wherein: the clamping block (1) and the opposite side of the clamping surface are inclined surfaces, and the inclined surfaces of the clamping block (1) are in friction fit with the inclined surfaces of the guide grooves (17).

8. The clamp suitable for the torsional fatigue test of samples with various specifications as claimed in claim 7, wherein: the section of the clamping surface of the clamping block (1) is V-shaped.