CN211668757U

CN211668757U - Stress-strain tester

Info

Publication number: CN211668757U
Application number: CN202020688805.0U
Authority: CN
Inventors: 崔泽
Original assignee: Shandong Jiaotong University
Current assignee: Shandong Jiaotong University
Priority date: 2020-04-29
Filing date: 2020-04-29
Publication date: 2020-10-13
Anticipated expiration: 2030-04-29

Abstract

The utility model discloses a stress-strain tester, including support, fixing base, first activity post and clamp splice, display device is installed to the top of support, the outside of sliding sleeve is provided with the fly leaf, pressure sensor is installed to the inboard of extrusion head, the fixing base bolt fastening is in the upper surface of support, the top of fixing base is provided with the sliding seat, the intermediate position of sliding seat is provided with first activity post, first spring has been cup jointed in the outside of guide post, the second spout has been seted up to the upper surface of sliding seat, be connected with the second spring between the inner wall of first slider and second spout. The stress-strain tester can automatically and quickly clamp and fix a plate-shaped structural part to be tested, avoids the stress deviation in the testing process of the structural part, improves the testing accuracy of the tester, and can simultaneously perform multi-angle extrusion testing on the structural part to be tested, so that the testing data of the device is more perfect.

Description

Stress-strain tester

Technical Field

The utility model relates to a stress-strain test technical field specifically is a stress-strain tester.

Background

In the mechanical manufacturing process, a large number of plate-shaped structural members are required to be used, the stability of the mechanical structure depends on the firmness degree of each structural member, the structural members with stable structure can effectively prolong the service life of the mechanical structure, and therefore, a stress-strain tester is required to be used for carrying out stress-strain test on the structural members in the machining process so as to analyze the strength characteristic and the fatigue characteristic of the structural members, but the stress-strain testers in the market at present still have some defects, such as:

1. the plate-shaped structural member needs to bear larger extrusion force when being subjected to stress-strain test, but the stress-strain tester in the market at present is inconvenient for rapidly and stably clamping the structural member to be detected, so that the structural member is easy to deviate in the test process, the accurate test of the stress-strain is influenced, and certain use defects exist;

2. most of stress-strain testers in the current market are structurally fixed, the placing angle of a structural part to be tested is inconvenient to adjust, the device is inconvenient to detect the condition of internal stress strain of the plate-shaped structural part under the condition of stress at different angles, and test data are incomplete.

We have therefore proposed a stress-strain gauge in order to solve the problems set out above.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a stress-strain tester to solve the inconvenient structure that treats the detection of stress-strain tester on the existing market that above-mentioned background art provided and carry out quick stable centre gripping and the inconvenient problem of adjusting the angle of putting of the structure that awaits measuring.

In order to achieve the above object, the utility model provides a following technical scheme: a stress-strain tester comprises a support, a fixed seat, a first movable column and a clamping block, wherein a display device is installed above the support, a stand column is fixed on the upper surface of the support through a bolt, a sliding sleeve is sleeved outside the stand column, a movable plate is arranged outside the sliding sleeve, a hydraulic rod is installed above the movable plate, an extrusion head is installed on the lower surface of the movable plate, a pressure sensor is installed on the inner side of the extrusion head, the fixed seat is fixed on the upper surface of the support through the bolt, a first sliding groove is formed in the fixed seat, a threaded rod is connected to an inner bearing of the first sliding groove, a movable seat is arranged above the fixed seat, a connecting rod is connected between the movable seat and a first sliding block, the first movable column is arranged at the middle position of the movable seat, a second movable column is arranged above the first movable column, and a guide column is arranged on the lower surface of the second, the first spring has been cup jointed in the outside of guide post, the second spout has been seted up to the upper surface of sliding seat, and the inside of second spout is provided with the second slider to the outside of second slider is connected with the connection rope, be connected with the second spring between the inner wall of second slider and second spout, and the top of second slider is provided with the clamp splice.

Preferably, the first sliding block and the first sliding groove form a clamping sliding structure, the first sliding block is in threaded connection with the threaded rod, the first sliding block and the connecting rod form a rotating structure, and meanwhile the connecting rod and the movable seat form a rotating structure.

Preferably, the middle position of the movable seat is provided with a containing groove, the containing groove is in clearance fit with the first movable column, and the lower end of the first movable column is attached to the connecting rope.

Preferably, the upper end of the first movable column is provided with a hidden groove, the hidden groove is in clearance fit with the guide column, the guide column and the second movable column are of an integrated structure, and the second movable column and the first movable column form an elastic structure through a first spring.

Preferably, the second sliding block and the second sliding groove form a clamping sliding structure, the second sliding block and the clamping block are in an integrated structure, and the clamping blocks are symmetrically provided with 2 clamping blocks.

Preferably, the outer side of the clamping block is provided with a supporting block, the section of the supporting block is in a triangular structure, and the lower surface of the supporting block is attached to the upper surface of the movable seat.

Compared with the prior art, the beneficial effects of the utility model are that: the stress-strain tester;

1. the device is provided with a first movable column and a clamping block, the first movable column can push a connecting rope under the action of gravity of a structural part to be tested, so that the clamping block can be automatically pulled to be close to the structural part, the structural part can be subjected to position adjustment and primary clamping, when the structural part is subjected to extrusion force, the first movable column can be continuously pushed to move downwards, the structural part can be automatically clamped again by the clamping block, the device can automatically and quickly clamp and fix the plate-shaped structural part to be tested through the structure, the stress deviation in the testing process of the structural part is avoided, and the testing accuracy of the device is improved;

2. be provided with threaded rod and sliding seat, through rotatory threaded rod, the position of the first slider of regulation that can be quick for first slider promotes the sliding seat through the connecting rod and removes, thereby adjusts the angle of putting of the structure that the sliding seat and its top were held, makes the device can carry out the side application of force to the structure, makes the device can carry out the multi-angle extrusion test to the structure that awaits measuring through this structure, makes the test data of device more perfect.

Drawings

FIG. 1 is a schematic view of the main sectional structure of the present invention during vertical force application;

FIG. 2 is a schematic view of the main sectional structure of the present invention during the application of force in an inclined state;

FIG. 3 is a schematic view of the main sectional structure of the fixed seat and the movable seat of the present invention;

fig. 4 is an enlarged schematic structural view of a portion a in fig. 3 according to the present invention.

In the figure: 1. a support; 2. a display device; 3. a column; 4. a sliding sleeve; 5. a movable plate; 6. a hydraulic lever; 7. an extrusion head; 8. a pressure sensor; 9. a fixed seat; 10. a first chute; 11. a first slider; 12. a threaded rod; 13. a movable seat; 1301. placing a containing groove; 14. a connecting rod; 15. a first movable column; 1501. a hidden groove; 16. a second movable column; 17. a guide post; 18. a first spring; 19. a second chute; 20. a second slider; 21. connecting ropes; 22. a second spring; 23. a clamping block; 2301. and (7) a supporting block.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides a technical solution: a stress-strain tester comprises a support 1, a display device 2, an upright post 3, a sliding sleeve 4, a movable plate 5, a hydraulic rod 6, an extrusion head 7, a pressure sensor 8, a fixed seat 9, a first sliding groove 10, a first sliding block 11, a threaded rod 12, a movable seat 13, a connecting rod 14, a first movable post 15, a second movable post 16, a guide post 17, a first spring 18, a second sliding groove 19, a second sliding block 20, a connecting rope 21, a second spring 22 and a clamping block 23, wherein the display device 2 is installed above the support 1, the upright post 3 is fixed on the upper surface of the support 1 through bolts, the sliding sleeve 4 is sleeved on the outer side of the upright post 3, the movable plate 5 is arranged on the outer side of the sliding sleeve 4, the hydraulic rod 6 is installed above the movable plate 5, the extrusion head 7 is installed on the lower surface of the movable plate 5, the pressure sensor 8 is installed on the inner side of the extrusion head 7, the fixed seat, a first sliding groove 10 is formed in the fixed seat 9, a threaded rod 12 is connected to an inner bearing of the first sliding groove 10, a movable seat 13 is arranged above the fixed seat 9, a connecting rod 14 is connected between the movable seat 13 and the first sliding block 11, a first movable column 15 is arranged in the middle of the movable seat 13, a second movable column 16 is arranged above the first movable column 15, a guide column 17 is arranged on the lower surface of the second movable column 16, a first spring 18 is sleeved on the outer side of the guide column 17, a second sliding groove 19 is formed in the upper surface of the movable seat 13, a second sliding block 20 is arranged in the second sliding groove 19, a connecting rope 21 is connected to the outer side of the second sliding block 20, a second spring 22 is connected between the second sliding block 20 and the inner wall of the second sliding groove 19, and a clamping block 23 is arranged above the second sliding block 20;

the first sliding block 11 and the first sliding chute 10 form a clamping sliding structure, the first sliding block 11 is in threaded connection with the threaded rod 12, the first sliding block 11 and the connecting rod 14 form a rotating structure, meanwhile, the connecting rod 14 and the movable seat 13 form a rotating structure, the position of the first sliding block 11 in the first sliding chute 10 can be conveniently adjusted by rotating the threaded rod 12, the movable seat 13 can be pulled by the connecting rod 14 in the moving process of the first sliding block 11, the placing angle of the movable seat 13 can be adjusted, and therefore the device can extrude the plate-shaped structural member in multiple angles and test the stress-strain condition;

a containing groove 1301 is formed in the middle of the movable seat 13, the containing groove 1301 is in clearance fit with the first movable column 15, the lower end of the first movable column 15 is attached to the connecting rope 21, the first movable column 15 can slide downwards along the containing groove 1301 under the action of gravity of the plate-shaped structural member to be tested, the connecting rope 21 is pushed, the connecting rope 21 pulls the clamp blocks 23 to automatically adjust the position of the structural member, and preliminary clamping of the structural member is completed;

the upper end of the first movable column 15 is provided with a hidden groove 1501, the hidden groove 1501 is in clearance fit with the guide column 17, the guide column 17 and the second movable column 16 are of an integrated structure, meanwhile, the second movable column 16 and the first movable column 15 form an elastic structure through the first spring 18, when the extrusion head 7 extrudes a structural part, the clamping block 23 can further clamp the structural part, when the clamping block 23 cannot move, the guide column 17 can slide along the hidden groove 1501, and therefore a certain deformation space is provided for the structural part;

the second sliding block 20 and the second sliding groove 19 form a clamping sliding structure, the second sliding block 20 and the clamping block 23 are of an integrated structure, 2 clamping blocks 23 are symmetrically arranged, and the clamping block 23 can be driven to rapidly clamp and fix the structural member to be tested by sliding the second sliding block 20 along the second sliding groove 19, so that the structural member is prevented from shaking due to stress;

the outside of clamp splice 23 is provided with supporting shoe 2301, and the section of supporting shoe 2301 is the triangle-shaped structure to the lower surface laminating of supporting shoe 2301 is in the upper surface of movable seat 13, can effectively improve the stability of clamp splice 23 through supporting shoe 2301, avoids the structure to damage clamp splice 23 when carrying out the side extrusion, has improved the structural stability of device.

The working principle is as follows: when the stress-strain tester is used, firstly, as shown in fig. 1 and 3-4, the structural member to be tested is placed above the second movable column 16, so that the second movable column 16 and the first movable column 15 slide along the accommodating groove 1301 under the action of the gravity of the structural member, at this time, the first movable column 15 pushes the connecting rope 21, so that the connecting rope 21 pulls the second slider 20 to slide along the second chute 19, the second slider 20 drives the clamping block 23 to move in the direction of the structural member during the sliding process, so as to adjust the position of the structural member and perform primary clamping, then the hydraulic rod 6 is controlled to push the movable plate 5, so that the extrusion head 7 contacts and extrudes the structural member, at this time, the first movable column 15 is forced to continue to move downwards, so that the connecting rope 21 is tightened, at this time, the clamping block 23 can secondarily clamp the structural member, so as to continue to press the extrusion head 7 downwards, so that the guide column 17 slides downwards along the blind groove 1501, thereby providing a deformation space for the structural member and displaying the stress-strain curve of the structural member through the display device 2;

as shown in fig. 2-3, the threaded rod 12 is rotated, so that the first sliding block 11 slides along the first sliding groove 10, the first sliding block 11 can pull the movable seat 13 through the connecting rod 14 in the sliding process, the movable seat 13 tilts, the structural member clamped above the movable seat 13 also tilts at the moment, and then the extrusion head 7 is controlled to move downwards to extrude the structural member, so that the stress strain condition of the structural member under different stress angles can be tested, the test data of the instrument is more comprehensive, and a series of work is completed.

Those not described in detail in this specification are within the skill of the art.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a stress-strain tester, includes support (1), fixing base (9), first activity post (15) and clamp splice (23), its characterized in that: the display device is characterized in that a display device (2) is installed above the support (1), a stand column (3) is fixed on the upper surface of the support (1) through a bolt, a sliding sleeve (4) is sleeved on the outer side of the stand column (3), a movable plate (5) is arranged on the outer side of the sliding sleeve (4), a hydraulic rod (6) is installed above the movable plate (5), an extrusion head (7) is installed on the lower surface of the movable plate (5), a pressure sensor (8) is installed on the inner side of the extrusion head (7), a fixing seat (9) is fixed on the upper surface of the support (1) through a bolt, a first sliding groove (10) is formed in the fixing seat (9), a threaded rod (12) is connected to an inner bearing of the first sliding groove (10), a movable seat (13) is arranged above the fixing seat (9), and a connecting rod (14) is connected between the movable seat, the middle position of sliding seat (13) is provided with first activity post (15), and the top of first activity post (15) is provided with second activity post (16) to the lower surface of second activity post (16) is provided with guide post (17), first spring (18) have been cup jointed in the outside of guide post (17), second spout (19) have been seted up to the upper surface of sliding seat (13), and the inside of second spout (19) is provided with second slider (20), and the outside of second slider (20) is connected with and connects rope (21), be connected with second spring (22) between the inner wall of second slider (20) and second spout (19), and the top of second slider (20) is provided with clamp splice (23).

2. A stress-strain gauge according to claim 1, wherein: the first sliding block (11) and the first sliding groove (10) form a clamping sliding structure, the first sliding block (11) is in threaded connection with the threaded rod (12), the first sliding block (11) and the connecting rod (14) form a rotating structure, and meanwhile the connecting rod (14) and the movable seat (13) form a rotating structure.

3. A stress-strain gauge according to claim 1, wherein: a containing groove (1301) is formed in the middle of the movable seat (13), the containing groove (1301) is in clearance fit with the first movable column (15), and the lower end of the first movable column (15) is attached to the connecting rope (21).

4. A stress-strain gauge according to claim 1, wherein: the upper end of the first movable column (15) is provided with a hidden groove (1501), the hidden groove (1501) is in clearance fit with the guide column (17), the guide column (17) and the second movable column (16) are of an integrated structure, and meanwhile the second movable column (16) and the first movable column (15) form an elastic structure through a first spring (18).

5. A stress-strain gauge according to claim 1, wherein: the second sliding block (20) and the second sliding groove (19) form a clamping sliding structure, the second sliding block (20) and the clamping block (23) are integrated, and 2 clamping blocks (23) are symmetrically arranged.

6. A stress-strain gauge according to claim 1, wherein: the outer side of the clamping block (23) is provided with a supporting block (2301), the section of the supporting block (2301) is of a triangular structure, and the lower surface of the supporting block (2301) is attached to the upper surface of the movable seat (13).