CN109596420B

CN109596420B - Clamp for tensile test

Info

Publication number: CN109596420B
Application number: CN201910098996.7A
Authority: CN
Inventors: 隋志方; 王曹宇; 张顺; 侯长江; 叶松; 韩月董; 于科科
Original assignee: HEBI QUALITY AND TECHNICAL SUPERVISION AND INSPECTION CENTER
Current assignee: HEBI QUALITY AND TECHNICAL SUPERVISION AND INSPECTION CENTER
Priority date: 2019-01-31
Filing date: 2019-01-31
Publication date: 2020-01-24
Anticipated expiration: 2039-01-31
Also published as: CN109596420A

Abstract

The clamp for the tension test effectively solves the problems of low clamping speed, low test efficiency and the like of the conventional tension clamp; the clamping head is provided with a dovetail groove, a supporting rod is connected to the clamping head, a left jaw and a right jaw which are matched to use are arranged in the dovetail groove, one side face of each of the left jaw and the right jaw is an inclined face matched with the side face of the dovetail groove, and the opposite faces of the left jaw and the right jaw form a clamping face; the clamping device is ingenious in structure and convenient to use, can quickly finish clamping and disassembling of workpieces, greatly shortens test time, saves a large amount of manpower and material resources, and improves working efficiency.

Description

Clamp for tensile test

Technical Field

The invention relates to the technical field of tension detection equipment, in particular to a clamp for a tension test.

Background

In the detection of many products, the tensile strength is one of the important indexes, a tensile testing machine is needed for detecting the tensile strength, when the tensile testing machine is used for detecting the tensile strength, a tool attached to the tensile testing machine is generally used, the time consumption is long when the workpiece is clamped, the time for taking down the detected workpiece is also long when the test is finished, and when the tensile strength of a batch of samples is detected, a large batch of samples is often needed for detection, so that a large amount of manpower and material resources are needed for the test.

The conventional clamp for the tensile test cannot quickly clamp and disassemble workpieces, so that the time for performing the tensile test is too long, and the large-batch test is not facilitated.

Disclosure of Invention

Aiming at the situation, in order to overcome the defects of the prior art, the invention aims to provide the clamp for the tensile test, which effectively solves the problems of low clamping speed, low test efficiency and the like of the conventional tensile clamp.

The technical scheme for solving the problems is that the clamp for the tension test comprises a chuck, wherein a dovetail groove is arranged on the chuck, a supporting rod is connected to the chuck, a left jaw and a right jaw which are matched with each other are arranged in the dovetail groove, one side surface of each of the left jaw and the right jaw is an inclined surface matched with the side surface of the dovetail groove, and the opposite surfaces of the left jaw and the right jaw form a clamping surface;

the inner part of one end of the support rod, which is close to the chuck, is hollow, a plurality of vertical grooves are uniformly distributed on the outer side of the support rod, a push rod with the end part extending into the chuck is arranged in the support rod in a penetrating manner, a stop rod sliding in the grooves extends out of one end of the push rod, which is positioned in the support rod, a push plate is connected to one end of the push rod, which is positioned in the chuck, a groove is respectively arranged on the left jaw and the right jaw, and the push plate is inserted into the grooves, so;

the supporting rod is provided with a plurality of fixing grooves, the supporting rod is sleeved with a fixing sleeve, a bolt is movably arranged on the fixing sleeve, the bolt is inserted into the fixing grooves to fix the position of the fixing sleeve and the supporting rod, the fixing sleeve is externally connected with a turntable, and the turntable is positioned above the stop lever.

The clamping device is ingenious in structure and convenient to use, can quickly finish clamping and disassembling of workpieces, greatly shortens test time, saves a large amount of manpower and material resources, and improves working efficiency.

Drawings

Fig. 1 is a schematic perspective view of the front surface of the present invention.

Fig. 2 is a schematic perspective view of the back side of the present invention.

Fig. 3 is a front view of the present invention.

FIG. 4 is a schematic cross-sectional view of A-A of FIG. 3 according to the present invention.

Fig. 5 is a schematic perspective view of the chuck of the present invention.

Fig. 6 is a cross-sectional view of the cartridge of the present invention.

Fig. 7 is a view of the invention from direction C in fig. 6.

FIG. 8 is a perspective view of the left jaw of the present invention.

Fig. 9 is a perspective view of the right jaw of the present invention.

Fig. 10 is a perspective view of the right jaw side of the present invention.

Fig. 11 is a perspective view of the combination of the left and right jaws of the present invention.

Fig. 12 is a perspective view of the push rod of the present invention.

Fig. 13 is an enlarged view of portion B of fig. 4 (with the latch inserted into the retaining groove) in accordance with the present invention.

Fig. 14 is a schematic view showing a structure in which the locking pin is released from the fixing groove in the present invention.

Detailed Description

The following describes the embodiments of the present invention in further detail with reference to fig. 1 to 14.

As can be seen from fig. 1 to 14, the clamp for the tensile test comprises a chuck 1, wherein a dovetail groove 2 is arranged on the chuck 1, a supporting rod 3 is connected on the chuck 1, a left jaw 4 and a right jaw 5 which are matched with each other are arranged in the dovetail groove 2, a side surface of each of the left jaw 4 and the right jaw 5 is an inclined surface matched with the side surface of the dovetail groove 2, and a clamping surface is formed by the opposite surfaces of the left jaw 4 and the right jaw 5;

the inner part of one end of the supporting rod 3, which is close to the chuck 1, is hollow, a plurality of vertical slots 6 are uniformly distributed on the outer side of the supporting rod 3, a push rod 7 with the end part extending into the chuck 1 is arranged in the supporting rod 3 in a penetrating manner, a stop lever 8 sliding in the slot 6 extends out of one end of the push rod 7, which is positioned in the supporting rod 3, one end of the push rod 7, which is positioned in the chuck 1, is connected with a push plate 9, a groove 10 is respectively arranged on the left jaw 4 and the right jaw 5, and the push plate 9 is inserted into the groove 10 so that the;

a plurality of fixed slots 11 are arranged above the supporting rod 3, a fixed sleeve 12 is sleeved on the supporting rod 3, a bolt 13 is movably arranged on the fixed sleeve 12, the bolt 13 is inserted into the fixed slots 11 to fix the positions of the fixed sleeve 12 and the supporting rod 3, a rotary table 14 is connected with the external thread of the fixed sleeve 12, and the rotary table 14 is positioned above the stop lever 8.

The fixing sleeve 12 is provided with a fixing seat 15, the bolt 13 is slidably arranged in the fixing seat 15 in a penetrating manner, a limiting plate 16 positioned on the outer side of the bolt 13 is fixed on the fixing seat 15, and a first spring 17 is arranged between the limiting plate 16 and the bolt 13.

The fixing grooves 11 are communicated with each other through limiting grooves, and the depth of each limiting groove is smaller than that of each fixing groove 11.

The fixing seat 15 is provided with an operating block 19 located outside the limiting plate 16 in a sliding manner, a flexible rod 20 is arranged in the fixing seat 15, two ends of the flexible rod 20 are respectively connected with the operating block 19 and the bolt 13, and the operating block 19 is pushed to control the movement of the bolt 13.

A slide rail 21 is arranged in the fixed seat 15, and the flexible rod 20 moves in the slide rail 21.

The inner side of the chuck 1 is provided with a step 22, the side wall of the chuck 1 is provided with a plurality of shift levers 23 in a rotating manner, two ends of each shift lever 23 are respectively positioned at the inner side and the outer side of the side wall of the chuck 1, one ends of the shift levers 23 positioned at the outer side are connected through a connecting rod 24, and one side of the connecting rod 24 is provided with a plurality of second springs 25.

The contact surfaces of the outer sides of the left jaw 4 and the right jaw 5 and the chuck 1 are provided with sliding grooves 26, and the inner ends of the sliding grooves 26 are provided with barrier strips 27.

The push plate 9 is rotatably fixed at the lower end of the push rod 7, an arc-shaped plate 28 extends below the push plate 9, an arc-shaped groove 29 is formed in the right jaw 5, first limiting grooves 30 are formed in two sides of the arc-shaped groove 29, and a second limiting groove 31 matched with the first limiting groove 30 is formed in the left jaw 4.

When the invention is used, the water-saving agent is added,

firstly, a jaw is installed on a chuck 1 and is connected with a push rod 7, before a workpiece is clamped, the push rod 7 moves upwards, the jaw is pulled upwards, so that a gap between a left jaw 4 and a right jaw 5 is increased, the workpiece is clamped, the workpiece is placed between the left jaw 4 and the right jaw 5, at the moment, an operation block 19 is pressed, so that a fixed sleeve 12 can slide up and down, when the fixed sleeve 12 moves to the lowest movable position, the operation block 19 is loosened, so that the fixed sleeve 12 is fixed on a support rod 3, at the moment, a rotary disc 14 is rotated, the rotary disc 14 continues to drive a stop lever 8 on the push rod 7 to move downwards under the action of threads, a push plate 9 at the other end of the push rod 7 pushes the left jaw 4 and the right jaw 5 to move downwards, and the left jaw 4 and the right jaw 5 approach each other under the action of a dovetail groove 2 of the chuck 1, so as to clamp the workpiece.

In the process of clamping, realize pressing from both sides tightly in advance of work piece through removing fixed cover 12, and rotate carousel 14 and realize further pressing from both sides tight of work piece, compare originally can only realize pressing from both sides tightly through rotating the screw thread, very big reduction the time of clamping, reduced work load, improved work efficiency.

After the test is finished, after the rotary disc 14 is slightly unscrewed, the rotary disc 14 is quickly moved upwards by moving the fixed sleeve 12, so that a larger moving space is provided for the push rod 7, and the tested workpiece is convenient to take out.

3 tops of branch are equipped with a plurality of fixed slots 11, be equipped with fixing base 15 on fixed cover 12, bolt 13 slides and wears to establish in fixing base 15, bolt 13 inserts in fixed slot 11 and makes

fixed cover

12 and 3 fixed positions of branch, it is provided with the operation piece 19 that is located the limiting plate 16 outside to slide on the fixing base 15, be equipped with flexible stick 20 in the fixing base 15, operation piece 19 and bolt 13 are connected respectively to flexible stick 20 both ends, promote the activity of 19 control bolts of operation piece 19, when pressing

operation piece

19, 20 other ends jack-up bolts 13 of flexible stick, make bolt 13 break away from fixed slot 11, fixed cover 12 can slide from top to bottom this moment, when fixed cover 12 locks, bolt 13 inserts in fixed slot 11, flexible stick 20 promotes operation piece 19 makes its outside removal this moment.

A limiting plate 16 positioned outside the plug 13 is fixed on the fixed seat 15, and a first spring 17 is arranged between the limiting plate 16 and the plug. The first spring 17 pushes the latch 13 in the direction of the fixing groove 11, so that the latch 13 can always be inserted into the fixing groove 11 without operating, and the position of the fixing sleeve 12 is locked.

Through sliding tray 18 intercommunication between a plurality of fixed slots 11, sliding tray 18's the degree of depth is less than fixed slot 11's the degree of depth, when bolt 13 inserts in fixed slot 11, bolt 13 inner is not higher than sliding tray 18 inner face, when fixed cover 12 is removed to needs, bolt 13 inner is higher than sliding tray 18 and not higher than branch 3 surface, bolt 13 slides in sliding tray 18 promptly, can guarantee like this that fixed cover 12 does not produce with branch 3 and rotates, bolt 13 can insert in fixed slot 11 when unclamping operation piece 19, fixed cover 12 position fixing.

In order to facilitate the movement of the flexible rod 20, a slide 21 is provided in the fixing seat 15, and the flexible rod 20 moves in the slide 21, so as to avoid the position deviation of the flexible rod 20 when the operation block 19 is pressed.

In order to maintain the clamp conveniently, the fixed seat 15 and the fixed sleeve 12 are detachably connected, and screw connection or lock catch connection can be selected, so that the bolt 13 can be completely separated from the positions of the fixed groove 11 and the sliding groove 18 after the fixed seat 15 is detached when maintenance is performed, the fixed sleeve 12 can rotate on the supporting rod 3 and can be taken down from the top end of the supporting rod 3, and the clamp is convenient to maintain.

In order to facilitate the rapid installation and disassembly of the jaws, the step 22 is arranged on the inner side of the rear part of the chuck 1, the left jaw 4 and the right jaw 5 are placed against the step 22, so that the left jaw 4 and the right jaw 5 can not move backwards, the contact surfaces of the outer sides of the left jaw 4 and the right jaw 5 and the chuck 1 are provided with a sliding groove 26, the inner end of the sliding groove 26 is provided with a barrier strip 27, the barrier strip 27 is provided with a plurality of abdicating grooves, the side wall of the chuck 1 is rotatably provided with a plurality of shift levers 23, two ends of the shift levers 23 are respectively positioned on the inner side and the outer side of the side wall of the chuck, so that the shift lever 23 rotates, the left jaw 4 and the right jaw 5 enter the sliding groove 26, the shift lever 23 is reset under the action of the second spring 25, the end of the shift lever 23 enters between the barrier strip 27 and the sliding groove 26, and the shift lever 23 is inwards abutted against the left jaw 4 and the right jaw 5, so that the shift lever cannot move forwards without affecting the vertical sliding of the shift lever in the dovetail groove 2.

When the jaws are removed, the connecting rod 24 is pulled from the outer side of the chuck 1, so that the other end of the pulling rod 23 rotates to be below the plane in the chuck 1, and the left jaw 4 and the right jaw 5 can be slid outwards to remove the left jaw 4 and the right jaw 5.

The second spring 25 pushes the connecting rod 24, so that the shift lever 23 is always in a tilting state, and the left jaw 4 and the right jaw 5 can be always clamped when no external force exists, and the falling off of the left jaw and the right jaw is prevented.

In order to better fix the left jaw 4 and the right jaw 5, the right jaw 5 is provided with an arc groove 29, two sides of the arc groove 29 are provided with first limit grooves 30, the left jaw 4 is provided with a second limit groove 31 matched with the first limit groove 30, the push plate 9 is rotationally fixed at the lower end of the push rod 7, an arc plate 28 extends out of the lower part of the push plate 9, when the left jaw 4 and the right jaw 5 are installed, the arc-shaped plate 28 is firstly rotated to the rear side, then the arc-shaped plate 28 and the arc-shaped groove 29 are aligned, the arc-shaped plate 28 is rotated to the front side, at the moment, the arc-shaped plate 28 is positioned in the first limiting groove 30 and the second limiting groove 31, the left jaw 4 and the right jaw 5 are clamped, so that the left jaw 4 and the right jaw 5 can not move forwards, the fixing mode is faster compared with the original mode of fixing by using screws and gaskets, since the push plate 9 is always located in the groove 10, the arc-shaped plate 28 can always block the left jaw 4 and the right jaw 5.

Compared with the prior art, the invention has the following beneficial effects: ) The jaw is simple, convenient and quick to install and dismantle, and a large amount of time is saved; ) The clamping and the dismounting of the tested workpiece are simple and efficient, the clamping of the workpiece is stable, and the workpiece is not easy to slide in the testing process; ) When the fixed sleeve 12 is moved, the bolt 13 is separated from the fixed sleeve 12 in a pressing mode, so that the use is more convenient and faster, and the operation of staff is convenient.

Claims

1. A clamp for a tensile test comprises a chuck (1), wherein a dovetail groove (2) is arranged on the chuck (1), and a support rod (3) is connected to the chuck (1), and the clamp is characterized in that a left jaw (4) and a right jaw (5) which are matched with each other are arranged in the dovetail groove (2), one side surface of each of the left jaw (4) and the right jaw (5) is an inclined surface matched with the side surface of the dovetail groove (2), and the opposite surfaces of the left jaw (4) and the right jaw (5) form a clamping surface; one end of the support rod (3) close to the chuck (1) is internally hollow, a plurality of vertical grooves (6) are uniformly distributed on the outer side of the support rod, a push rod (7) with the end part extending into the chuck (1) penetrates through the support rod (3), a stop rod (8) sliding in the groove (6) extends out of one end of the push rod (7) positioned in the support rod (3), one end of the push rod (7) positioned in the chuck (1) is connected with a push plate (9), a groove (10) is respectively arranged on the left jaw (4) and the right jaw (5), and the push plate (9) is inserted into the groove (10), so that the push rod (7) drives the left jaw (4) and the right jaw (5) to move up and down; a plurality of fixing grooves (11) are formed above the supporting rod (3), a fixing sleeve (12) is sleeved on the supporting rod (3), a bolt (13) is movably arranged on the fixing sleeve (12), the bolt (13) is inserted into the fixing grooves (11) to fix the positions of the fixing sleeve (12) and the supporting rod (3), a rotary table (14) is connected to the external thread of the fixing sleeve (12), and the rotary table (14) is located above the stop lever (8); a fixed seat (15) is arranged on the fixed sleeve (12), the bolt (13) is slidably arranged in the fixed seat (15), a limiting plate (16) positioned on the outer side of the bolt (13) is fixed on the fixed seat (15), and a first spring (17) is arranged between the limiting plate (16) and the bolt (13); an operation block (19) positioned on the outer side of the limiting plate (16) is arranged on the fixed seat (15) in a sliding mode, a flexible rod (20) is arranged in the fixed seat (15), two ends of the flexible rod (20) are respectively connected with the operation block (19) and the plug pin (13), and the operation block (19) is pushed to control the movement of the plug pin (13); a slide way (21) is arranged in the fixed seat (15), and the flexible rod (20) moves in the slide way (21).

2. The jig for the tensile test according to claim 1, wherein a plurality of the fixing grooves (11) are communicated with each other through a sliding groove (18), and the depth of the sliding groove (18) is smaller than that of the fixing groove (11).

3. The clamp for the tension test according to claim 1, wherein a step (22) is arranged on the inner side of the chuck (1), a plurality of deflector rods (23) are rotatably arranged on the side wall of the chuck (1), two ends of the deflector rods (23) are respectively arranged on the inner side and the outer side of the side wall of the chuck (1), one ends of the deflector rods (23) on the outer side are connected through a connecting rod (24), and one side of the connecting rod (24) is provided with a plurality of second springs (25); a sliding groove (26) is formed in the contact surface between the outer sides of the left jaw (4) and the right jaw (5) and the chuck (1), and a blocking strip (27) is arranged at the inner end of the sliding groove (26).

4. The clamp for the tension test is characterized in that the push plate (9) is rotatably fixed at the lower end of the push rod (7), an arc-shaped plate (28) extends below the push plate (9), the right jaw (5) is provided with an arc-shaped groove (29), two sides of the arc-shaped groove (29) are provided with first limiting grooves (30), and the left jaw (4) is provided with a second limiting groove (31) matched with the first limiting grooves (30).

5. The clamp for the tension test according to claim 1, wherein the push plate (9) is provided with an operating rod (32) at one side.