CN209927592U

CN209927592U - Clamp of tensile strength testing machine

Info

Publication number: CN209927592U
Application number: CN201920314689.3U
Authority: CN
Inventors: 徐心悦; 张鼎
Original assignee: Wanguo New Material Technology (shanghai) Co Ltd
Current assignee: Wanguo New Material Technology (shanghai) Co Ltd
Priority date: 2019-03-12
Filing date: 2019-03-12
Publication date: 2020-01-10
Anticipated expiration: 2029-03-12

Abstract

The utility model discloses an anchor clamps of tensile strength test machine. The technical key points are as follows: the utility model provides an anchor clamps of tensile strength test machine, be used for cliping the anchor clamps at test material both ends including relative setting from top to bottom, anchor clamps include the anchor clamps body and lie in this internal removal splint that are used for pressing from both sides tight fixed to test material that is used for of anchor clamps, the anchor clamps body including two fixed plates that the symmetry set up and with the one end fixed connection's of two fixed plates connecting plate, remove splint and fixed plate parallel arrangement and along with connecting plate sliding connection, it is connected with the threaded rod to rotate on the removal splint, the threaded rod passes one of them fixed plate and rather than threaded connection, the one side of connecting plate and removal splint contact is provided with and is used for sharing the tensile bar draw-in groove that the threaded. The utility model has the advantages of the threaded rod takes place to buckle when can avoiding tensile.

Description

Clamp of tensile strength testing machine

Technical Field

The utility model relates to a test equipment technical field, more specifically say, it relates to an anchor clamps of tensile strength test machine.

Background

A strength testing machine is a machine device for testing the tensile strength of an object. The tensile strength test can be carried out on rubber, plastics, films, textiles, fibers, nano materials, high polymer materials, composite materials, packaging tapes, paper, wires and cables, optical fiber cables, safety belts, leather belts and the like. The machine adopts electromechanical integration design and mainly comprises a force measuring sensor, a transmitter, a microprocessor, a load driving mechanism, a computer and a color ink-jet printer.

The strength testing machine in the prior art mainly comprises a machine body, a supporting seat arranged in the machine body, supports arranged on two sides of the supporting seat respectively, and a stretching table movably arranged between the supports on two sides, wherein clamps are connected to corresponding positions of the lower surface of the stretching table and the upper surface of the supporting seat respectively, the clamps can accurately test the stretching strength of materials made of polyurethane, and the clamps are used as one important component.

Chinese patent publication No. CN104165802A discloses a clamp for tensile test of tensile machine, which comprises a support, a threaded rod and clamp plates, wherein two side plates of the support are provided with threaded through holes I, the threaded rod is inserted into the threaded through holes I, the clamp plates are vertically fixed at one end of the threaded rod in the support, and at least 2 threaded through holes II are provided on each clamp plate.

The prior art is similar to the above-mentioned clamp for tensile test of tensile machine, and when testing a test material made of polyurethane, the clamp plate arranged in suspension in tension receives a force in the vertical direction and transmits the force to the threaded rod, and the threaded rod is bent after long-term use.

SUMMERY OF THE UTILITY MODEL

To the technical problem that has now, an object of the utility model is to provide an anchor clamps of tensile strength test machine, it has the threaded rod when can avoiding tensile and takes place crooked advantage.

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

the utility model provides an anchor clamps of tensile strength test machine, includes relative setting from top to bottom and is used for cliping the anchor clamps at test material both ends, anchor clamps include the anchor clamps body and lie in this internal removal splint that are used for pressing from both sides tight fixed to the test material that is used for, the anchor clamps body including two fixed plates that the symmetry set up and with the one end fixed connection's of two fixed plates connecting plate, remove splint and fixed plate parallel arrangement and along with connecting plate sliding connection, it is connected with the threaded rod to rotate on the removal splint, the threaded rod passes one of them fixed plate and rather than threaded connection, the connecting plate is provided with the tensile bar draw-in groove that is used for sharing the threaded rod to receive with the one side of removal splint contact, be provided with on.

Through adopting above-mentioned technical scheme, this internal movable clamp plate that sets up a slidable regulation at anchor clamps, place test material's one end at anchor clamps originally internally, it is tight along the removal of bar draw-in groove and press from both sides the material to drive movable clamp plate through rotating the threaded rod, when realizing sliding connection through bar draw-in groove and fixture block cooperation between movable clamp plate and the connecting plate, also can play a spacing effect to connecting when tensile, prevent that movable clamp plate from will power transmission to the threaded rod on, reach the effect of avoiding the threaded rod to take place to buckle.

The utility model discloses further set up to: one end of the connecting plate close to the fixed clamping plate is provided with a mounting groove communicated with the strip-shaped clamping groove and used for allowing the clamping block to enter the strip-shaped clamping groove.

Through adopting above-mentioned technical scheme, can pass through the mounting groove with the fixture block on the movable clamp plate and get into the bar draw-in groove, realize the joint cooperation of bar draw-in groove and fixture block.

The utility model discloses further set up to: the cross sections of the strip-shaped clamping grooves and the clamping blocks are arranged in a T shape.

Through adopting above-mentioned technical scheme, the fixture block through the T font cooperates with bar draw-in groove joint, not only can the threaded rod rotation time limit remove splint and rotate to realize removing splint and remove along bar draw-in groove length direction.

The utility model discloses further set up to the one side that removes splint and fixed plate and test material contact is provided with demountable installation's mould.

Through adopting above-mentioned technical scheme, different moulds can adapt to different centre gripping shapes, and the external diameter at the test material is different, can press from both sides tightly through demountable installation's suitable mould to improve anchor clamps's suitability.

The utility model discloses further set up to: the one side of moving splint and fixed plate and test material contact and the position that is close to the connecting plate all are provided with the recess, be provided with the lug of joint in the recess on the mould, the recess lateral wall is provided with the circular recess, be provided with the spring in the circular recess, the one end and the circular recess diapire of spring are fixed, the other end of spring is fixed with the round pin axle, the notch of circular recess is stretched out to the one end of round pin axle, be provided with on the lug and carry out the complex spacing groove with the position that the round pin axle is located the recess, all be provided with on the moving splint and the fixed splint of installing the mould and be used for controlling the flexible control assembly.

By adopting the technical scheme, when the die is required to be installed to clamp different test materials, the spring is compressed through the control assembly, so that the pin shaft is driven to move towards the bottom of the circular groove, the lug on the die can be clamped into the groove at the moment, the spring is restored to a natural state through the control assembly, the part of the pin shaft extending into the groove is in clamping fit with the limiting groove, and the die is installed and fixed; when the die is to be disassembled, the spring is compressed through the control assembly, so that the pin shaft is separated from the limiting groove, the limitation of the clamping block is eliminated, and the die is taken down.

The utility model discloses further set up to: the control assembly comprises round holes which are arranged on the movable clamping plate and the fixed plate and are communicated with the round grooves and coaxially arranged, and a pull rod which is fixedly connected with one end of the pin shaft close to the spring along the axis of the spring.

Through adopting above-mentioned technical scheme, drive round pin axle along spring axis round trip movement through the operation pull rod, realize the compression to the spring.

The utility model discloses further set up to: and sawtooth grains are arranged on one surfaces of the fixed plate, the movable clamping plate and the mold, which are in contact with the test material.

Through adopting above-mentioned technical scheme, can increase the frictional force of fixed plate, removal splint and mould and test material through the zigzag line, improve the tight intensity of clamp's clamp.

The utility model discloses further set up to: the movable clamping plate is provided with a fixing groove, a ball bearing is fixed in the fixing groove, one end of the threaded rod is fixed with an inner ring of the ball bearing, and the end face of the threaded rod and one side face of the ball bearing are attached to the bottom wall of the fixing groove.

Through adopting above-mentioned technical scheme, realize that the threaded rod is connected with movable clamp plate's rotation to reduce the wearing and tearing of threaded rod and movable clamp plate, when rotating the threaded rod, movable clamp plate can remove along the length direction of draw-in groove, and threaded rod and ball bearing's inner ring is not hard up when terminal surface through the threaded rod and ball bearing's a side and the laminating of fixed slot diapire can avoid the threaded rod to drive movable clamp plate and press from both sides tightly.

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

(1) by arranging the mounting groove, the clamping block and the strip-shaped clamping groove are matched to prevent the movable clamping plate from transmitting force to the threaded rod when the clamping block is stretched, so that the effect of preventing the threaded rod from being bent due to stress is achieved;

(2) the strip-shaped clamping groove and the clamping block with the T-shaped cross section are convenient for the installation and clamping of the movable clamping plate through the arrangement of the installation groove;

(3) through setting up recess, lug, the cooperation between spacing groove and the control assembly can play the installation and the dismantlement of the mould of being convenient for.

Drawings

FIG. 1 is a schematic structural diagram of the present embodiment;

FIG. 2 is a sectional view showing the coupling structure of the threaded rod according to the present embodiment;

FIG. 3 is a sectional view of the connection structure of the mold according to the present embodiment;

FIG. 4 is a schematic structural diagram of the present embodiment;

FIG. 5 is an enlarged view of A in FIG. 4;

fig. 6 is a cross-sectional view of the connection structure of the movable clamp plate and the connecting plate according to the embodiment.

Reference numerals: 1. a strength testing machine; 2. a stretching table; 3. a clamp; 4. a threaded rod; 5. a clamp body; 51. a fixing plate; 52. a connecting plate; 6. rotating the handle; 7. moving the clamping plate; 8. a mold; 9. a support plate; 10. a supporting seat; 11. fixing grooves; 12. a ball bearing; 13. a strip-shaped clamping groove; 14. a control component; 141. a pull rod; 142. a circular hole; 15. a groove; 16. a spring; 17. a circular groove; 18. a pin shaft; 19. a limiting groove; 20. a bump; 21. mounting grooves; 22. and (7) clamping blocks.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

In the embodiment, a clamp 3 of a tensile strength testing machine 1, as shown in fig. 1, comprises a clamp 3 arranged at a corresponding position of a lower surface of a stretching table 2 and an upper surface of a supporting seat 10 of the tensile strength testing machine 1 for clamping two ends of a testing material, the clamp 3, the stretching table 2 and the supporting seat 10 are fixed by bolts through a supporting plate 9, the clamp 3 comprises a clamp body 5 and a movable clamping plate 7 arranged in the clamp body 5, the clamp body 5 comprises two fixed plates 51 symmetrically arranged and a connecting plate 52 fixedly connected with one end of the two fixed plates 51, the clamp body 5 is provided with a movable clamping plate 7 which is arranged in parallel with the fixed plates 51 and is connected with the connecting plate 52 in a sliding way for adjusting the clamping thickness of the clamp 3, the movable clamping plate 7 is connected with a threaded rod 4 for controlling the movable clamping plate 7 to move in a rotating way, and the threaded rod 4 penetrates through one of the fixed plates 51 and is in threaded connection with the fixed plate 51; wherein, demountable installation has mould 8 on the one side of removal splint 7 and fixed plate 51 and test material contact, can install different mould 8 as required, realizes pressing from both sides tight tensile to the cylindric test material of different external diameters.

As shown in fig. 2, a fixing groove 11 is formed in the movable clamp plate 7, a ball bearing 12 is fixed in the fixing groove 11, one end of the threaded rod 4 is fixed with an inner ring of the ball bearing 12 to prevent the threaded rod 4 from being worn by the movable clamp plate 7 when rotating, the end face of the threaded rod 4 and one side face of the ball bearing 12 are tightly abutted to the bottom wall of the fixing groove 11, and looseness of the inner ring of the ball bearing 12 when the threaded rod 4 drives the movable clamp plate 7 to clamp can be avoided.

Referring to fig. 1 and 3, grooves 15 are formed in the surfaces of the movable clamping plate 7 and the fixed clamping plate provided with the mold 8, which are in contact with the test material, and the positions close to the connecting plate 52, respectively, a protrusion 20 clamped with the grooves 15 is arranged on the mold 8, a circular groove 17 is formed in the side wall of the groove 15, a spring 16 is arranged in the circular groove 17, one end of the spring 16 is fixed to the bottom wall of the circular groove 17, a pin shaft 18 for limiting and preventing the mold 8 from being separated from the movable clamping plate 7 and the fixed plate 51 is fixed to the other end of the spring 16, when the spring 16 is in a natural state, one end of the pin shaft 18 extends out of the notch of the circular groove 17 and is partially located in the groove 15, and a limiting groove 19 matched with the position of the pin shaft; wherein, all be provided with on the movable clamp plate 7 and the solid fixed clamp plate of installing mould 8 and be used for the flexible control assembly 14 of control spring 16, drive round pin axle 18 through compression spring 16 and move toward the diapire of circular recess 17, realize round pin axle 18 and spacing groove 19's separation and cooperation to realize installing in dismantling of mould 8.

As shown in fig. 3, the control assembly 14 includes a circular hole 142 coaxially disposed on the movable clamp plate 7 and the fixed plate 51 and communicating with the circular groove 17, a pull rod 141 fixedly connected to an end of the pin 18 near the spring 16 along the axis of the spring 16, and the compression of the spring 16 is achieved by operating the pull rod 141.

As shown in fig. 3, the fixed plate 51, the movable clamp plate 7 and the mold 8 are provided with saw-toothed lines for improving the clamping strength of the clamp 3 on the surface contacting with the test material; and a rotating handle 6 which is convenient for rotating the threaded rod 4 is arranged at one end of the threaded rod 4 far away from the movable clamping plate 7.

As shown in fig. 4, 5 and 6, a strip-shaped clamping groove 13 for limiting is arranged on the contact surface of the connecting plate 52 and the movable clamping plate 7, and a clamping block 22 in clamping fit with the strip-shaped clamping groove 13 is arranged on the movable clamping plate 7, so that the movable clamping plate 7 is limited during stretching; wherein, the one end that connecting plate 52 is close to the solid fixed splint is provided with the mounting groove 21 that communicates with bar draw-in groove 13 in order to be used for supplying fixture block 22 to get into bar draw-in groove 13, and fixture block 22 and bar draw-in groove 13's transversal personally submit the T word shape setting, can prevent fixture block 22 and bar draw-in groove 13 separation.

The utility model discloses a working process and beneficial effect as follows:

when the fixture works, two ends of a test material are placed in the fixture body 5 of the fixture 3 which is oppositely arranged up and down, the movable clamping plate 7 is driven to move along the length direction of the strip-shaped clamping groove 13 through the rotary threaded rod 4, the clamping block 22 on the movable clamping plate 7 can enter the strip-shaped clamping groove 13 through the mounting groove 21, the sliding connection between the movable clamping plate 7 and the connecting plate 52 is realized, the test material is clamped and fixed between the fixed plate 51 and the movable clamping plate 7, when the cylindrical test material is required to be tested, the mold 8 can be arranged on the movable clamping plate 7 and the fixed plate 51 to realize the clamping and fixing of the test material with different outer diameters, the effect of improving the applicability of the fixture 3 is achieved, when the fixture is stretched, the movable clamping plate 7 can bear a force in the vertical direction, and because the movable clamping plate 7 and the connecting plate 52 are clamped and matched through the clamping block 22 and the strip, the effect that the movable clamping plate 7 transmits force to the threaded rod 4 to cause the threaded rod 4 to bend is avoided.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a tensile strength test machine's anchor clamps, includes relative setting about and is used for cliping anchor clamps (3) at test material both ends, its characterized in that: the clamp (3) comprises a clamp body (5) and a movable clamping plate (7) which is positioned in the clamp body (5) and is used for clamping and fixing the test material, the clamp body (5) comprises two fixing plates (51) which are symmetrically arranged and a connecting plate (52) which is fixedly connected with one end of each fixing plate (51), the movable clamping plate (7) is arranged in parallel with the fixed plate (51) and is connected with the connecting plate (52) in a sliding way, the movable clamping plate (7) is rotatably connected with a threaded rod (4), the threaded rod (4) penetrates through one of the fixed plates (51) and is in threaded connection with the fixed plate, a strip-shaped clamping groove (13) for sharing the tensile force borne by the threaded rod (4) is arranged on one surface of the connecting plate (52) which is contacted with the movable clamping plate (7), a clamping block (22) which is matched with the strip-shaped clamping groove (13) in a clamping manner is arranged on the movable clamping plate (7).

2. The apparatus of claim 1, wherein: one end of the connecting plate (52) close to the fixed clamping plate is provided with a mounting groove (21) which is communicated with the strip-shaped clamping groove (13) and used for enabling the clamping block (22) to enter the strip-shaped clamping groove (13).

3. The apparatus of claim 2, wherein: the cross sections of the strip-shaped clamping grooves (13) and the clamping blocks (22) are arranged in a T shape.

4. The apparatus of claim 1, wherein: and a detachably mounted die (8) is arranged on one surface of the movable clamping plate (7) and one surface of the fixed plate (51) which are contacted with the test material.

5. The apparatus of claim 4, wherein: the movable clamping plate (7) and the fixed plate (51) are provided with grooves (15) at the surface contacting with the test material and the position close to the connecting plate (52), the mould (8) is provided with a convex block (20) clamped in the groove (15), a circular groove (17) is arranged on the side wall of the groove (15), a spring (16) is arranged in the circular groove (17), one end of the spring (16) is fixed with the bottom wall of the circular groove (17), the other end of the spring (16) is fixed with a pin shaft (18), one end of the pin shaft (18) extends out of the notch of the circular groove (17), a limiting groove (19) matched with the part of the pin shaft (18) positioned in the groove (15) is arranged on the lug (20), and the movable clamping plate (7) and the fixed clamping plate provided with the mold (8) are respectively provided with a control assembly (14) for controlling the extension and contraction of the spring (16).

6. The apparatus of claim 5, wherein: the control assembly (14) comprises round holes (142) which are arranged on the movable clamping plate (7) and the fixed plate (51), communicated with the round groove (17) and coaxially arranged, and a pull rod (141) which is fixedly connected with one end, close to the spring (16), of the pin shaft (18) along the axis of the spring (16).

7. The apparatus of claim 4, wherein: and sawtooth grains are arranged on one surfaces of the fixed plate (51), the movable clamping plate (7) and the mould (8) which are contacted with the test material.

8. The apparatus of claim 1, wherein: the movable clamping plate is characterized in that a fixing groove (11) is formed in the movable clamping plate (7), a ball bearing (12) is fixed in the fixing groove (11), one end of the threaded rod (4) is fixed to an inner ring of the ball bearing (12), and the end face of the threaded rod (4) and one side face of the ball bearing (12) are tightly abutted to the bottom wall of the fixing groove (11).