Tension test tool for padded nut

Abstract

The utility model provides a tension test tool for a padded nut, and belongs to the technical field of fastener processing. The clamp comprises an upper clamping block, a lower clamping block, an upper fixing block and a lower fixing block which are symmetrically arranged up and down, an upper groove and a lower groove are formed in the front side faces of the upper clamping block and the lower clamping block respectively, an upper penetrating hole and a lower penetrating hole are formed in the opposite side faces of the upper clamping block and the lower clamping block respectively, the upper fixing block is placed in the upper groove, and the lower fixing block is placed in the lower groove. A test bolt is inserted into the upper fixing block, the lower end of the test bolt penetrates through the upper penetrating hole and the lower penetrating hole at a time and extends into the lower groove, the lower fixing block is arranged in the lower groove, a second penetrating hole is formed in the lower fixing block, the lower end of the test nut penetrates through the second penetrating hole, and the end of the test nut is in threaded connection with a nut with a gasket. The nut part of the nut with the gasket is located in the second through hole, and the gasket part of the nut with the gasket makes contact with the lower side face of the lower fixing block. The pull-out force testing device can be used for carrying out pull-out force testing on padded nuts with different specifications by utilizing a tension testing machine, and is simple in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of fastener processing and relates to a tensile test tooling for a gasket nut. Background Art

[0002] The gasket nut is mainly applied to a connecting piece on a soft material or a mating surface prone to crushing, and can provide a stable friction coefficient for the connecting component. Its technical requirements are that the gasket and the nut have a certain bonding force and can rotate freely. In order to ensure the normal use of the gasket nut, it is necessary to measure the pull-off force between the nut and the gasket after stamping.

[0003] Currently, for the pull-off force test of the gasket nut, fingers or simple tools are usually used to pull and twist the nut and the gasket to check the riveting strength between the nut and the gasket. This method is cumbersome to operate and cannot ensure that the gasket nut is always axially stressed, affecting the detection accuracy. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a tensile test tooling for a gasket nut aiming at the above problems existing in the prior art, which can axially fix the gasket nut by using a tensile testing machine, is simple to operate and has high detection accuracy.

[0005] The purpose of the utility model can be realized by the following technical solutions:

[0006] The tensile test tooling for a gasket nut includes: an upper clamping block and a lower clamping block which are symmetrically arranged up and down. Upper grooves and lower grooves are respectively formed on the front side surfaces of the upper clamping block and the lower clamping block, and upper through holes and lower through holes are respectively formed on the opposite side surfaces of the upper clamping block and the lower clamping block;

[0007] An upper fixing block is placed in the upper groove above the upper through hole. A test bolt is inserted into the upper fixing block, and the lower end of the test bolt passes through the upper through hole and the lower through hole in sequence and extends into the lower groove;

[0008] A lower fixing block is arranged in the lower groove below the lower through hole. A second through hole is formed on the lower fixing block. The lower end of the test nut passes through the second through hole and is threadedly connected with a gasket nut at the end. The nut part of the gasket nut is located in the second through hole, and the gasket part of the gasket nut is in contact with the lower side surface of the lower fixing block.

[0009] Preferably, a third concave shoulder is formed on the lower side of the second through hole. The third concave shoulder is hexagonal. A second limiting block is inserted into the third concave shoulder. The outer side surface of the second limiting block is hexagonal. A second limiting hole is formed on the second limiting block. The nut of the gasket nut is inserted into the second limiting hole and matches with the second limiting hole.

[0010] Preferably, the lower side surface of the second limiting block is flush with the lower side surface of the lower fixing block.

[0011] Preferably, a first through hole is formed in the upper fixing block, a ring-shaped first concave shoulder is formed on the upper side of the first through hole, the test bolt is inserted into the upper fixing block through the first through hole, and the nut portion of the test bolt is located in the first concave shoulder.

[0012] Preferably, a second groove is formed in the side wall of the first concave shoulder, the second concave shoulder is hexagonal, a first limiting block is inserted into the second concave shoulder, the outer side surface of the first limiting block is hexagonal, a first limiting hole is formed in the first limiting block, and the nut of the test bolt is inserted into the first limiting hole and matches the first limiting hole.

[0013] Preferably, the upper side surface of the first limiting block extends out of the top of the second concave shoulder.

[0014] Preferably, upper limiting inclined blocks are respectively arranged on the lower side walls of the upper grooves on both sides of the upper through hole, the heights of the upper limiting inclined blocks decrease sequentially from front to back, lower limiting inclined blocks are respectively arranged on the upper side walls of the lower grooves on both sides of the lower through hole, and the heights of the lower limiting inclined blocks decrease sequentially from front to back.

[0015] Preferably, upper notch grooves are respectively formed on the front side surfaces of the upper clamping blocks on both sides of the upper groove, upper fixing bolts are horizontally inserted into the upper notch grooves, and the upper fixing bolts extend out of one of the upper notch grooves and the end portions thereof are threadedly connected with upper fixing nuts.

[0016] Preferably, lower notch grooves are respectively formed on the front side surfaces of the lower clamping blocks on both sides of the lower groove, lower fixing bolts are horizontally inserted into the lower notch grooves, and the lower fixing bolts extend out of one of the lower notch grooves and the end portions thereof are threadedly connected with lower fixing nuts.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] 1. Insert the test bolt into the upper fixing block, then put the lower fixing block on the lower end of the test bolt, and at the same time screw on the nut with washer. The nut part of the nut with washer extends into the second through hole. Use the washer of the nut with washer to clamp the lower fixing block on the test bolt. Then, through the tensile testing machine, make the upper clamping block and the lower clamping block contact each other, and vertically place the assembled set into the upper groove of the upper clamping block and the lower groove of the lower clamping block. At this time, the upper fixing block is placed in the upper groove, adjust the positions of the upper fixing block and the lower fixing block to keep the test bolt in a vertical state, start the tensile testing machine, make the upper clamping block and the lower clamping block move away from each other. At this time, the lower fixing block contacts and presses the upper side wall of the lower groove. Since the nut part of the nut with washer is threadedly connected to the test bolt, the washer part receives the downward extrusion force from the lower fixing block. When the extrusion force gradually increases to a certain value, the washer part and the nut part are separated, and the complete test curve is obtained through the tensile testing machine. The operation is simple and the detection accuracy is high;

[0019] 2. A hexagonal second shoulder is provided in the upper fixing block, and the matching first limiting block is clamped into the second shoulder. Since the first limiting block is also provided with a first limiting hole that matches the nut of the test bolt, after installing the first limiting block, it can limit the deflection of the test bolt during the tensile test, so that the test bolt always bears axial force and improves the accuracy of the test;

[0020] 3. A hexagonal third shoulder is provided in the lower fixing block, and the matching second limiting block is clamped into the third shoulder. Since the second limiting block is also provided with a second limiting hole that matches the nut with washer, after installing the second limiting block, it can limit the deflection of the nut with washer during the tensile test, so that the nut with washer always bears axial force and further improves the accuracy of the test. Description of the Drawings

[0021] Figure 1 is the structural schematic diagram of the present utility model;

[0022] Figure 2 is the assembly drawing of the test bolt and the nut with washer;

[0023] Figure 3 is Figure 1 the sectional view taken along line A-A in

[0024] Figure 4 is Figure 1 the sectional view taken along line B-B in

[0025] Figure 5 is the structural schematic diagram of Embodiment 2;

[0026] Figure 6 is Figure 5 the sectional view taken along line C-C in

[0027] Figure 7It is a schematic structural diagram of Embodiment 3;

[0028] Figure 8 is Figure 7 the cross-sectional view at D-D in

[0029] In the figure: 1. Tensile testing machine; 2. Upper clamping block; 21. Upper groove; 211. Upper limiting inclined block; 212. Upper notch groove; 213. Upper fixing bolt; 214. Upper fixing nut; 22. Upper through hole; 3. Lower clamping block; 31. Lower groove; 311. Lower limiting inclined block; 312. Lower notch groove; 313. Lower fixing bolt; 314. Lower fixing nut; 32. Lower through hole; 4. Upper fixing block; 41. First concave shoulder; 42. Second concave shoulder; 43. First through hole; 5. Lower fixing block; 51. Third concave shoulder; 52. Second through hole; 6. Test bolt; 61. Washer nut; 7. First limiting block; 71. First limiting hole; 8. Second limiting block; 81. Second limiting hole. Specific embodiments

[0030] The following are specific embodiments of the present invention and in combination with the attached drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0031] Embodiment 1:

[0032] As Figures 1-4 shown, a tensile test tooling for a washer nut, the tooling is installed on a tensile testing machine 1, and the tensile test tooling includes an upper clamping block 2 and a lower clamping block 3 which are symmetrically arranged up and down, and also includes an upper fixing block 4 and a lower fixing block 5.

[0033] Upper grooves 21 and lower grooves 31 are respectively formed on the front side surfaces of the upper clamping block 2 and the lower clamping block 3, upper through holes 22 and lower through holes 32 are respectively formed on the opposite side surfaces of the upper clamping block 2 and the lower clamping block 3, and the upper through holes 22 and the lower through holes 32 are vertically aligned.

[0034] The upper fixing block 4 is placed in the upper groove 21 above the upper through hole 22, a test bolt 6 is inserted into the upper fixing block 4, and the lower end of the test bolt 6 passes through the upper through hole 22 and the lower through hole 32 in sequence and extends into the lower groove 31.

[0035] The lower fixing block 5 is arranged in the lower groove 31 below the lower through hole 32, a second through hole 52 is formed on the lower fixing block 5, the lower end of the test nut 6 passes through the second through hole 52 and is threadedly connected with a washer nut 61 at the end, the nut part of the washer nut 61 is located in the second through hole 52, and the gasket part of the washer nut 61 is in contact with the lower side surface of the lower fixing block 5.

[0036] Insert the test bolt 6 into the upper fixing block 4, then fit the lower fixing block 5 onto the lower end of the test bolt 6, and at the same time screw on the nut with washer 61. The nut part of the nut with washer 61 extends into the second through-hole 52. Use the washer of the nut with washer 61 to clamp the lower fixing block 5 onto the test bolt 6. Then, through the tensile testing machine 1, make the upper clamping block 2 and the lower clamping block 3 contact each other. Place the assembled set vertically into the upper groove 21 of the upper clamping block 2 and the lower groove 31 of the lower clamping block 3. At this time, the upper fixing block 4 is placed in the upper groove 21. Adjust the positions of the upper fixing block 4 and the lower fixing block 5 to keep the test bolt 6 in a vertical state. Start the tensile testing machine 1 to move the upper clamping block 2 and the lower clamping block 3 away from each other. At this time, the lower fixing block 5 contacts and presses against the upper side wall of the lower groove 31. Since the nut part of the nut with washer 61 is threadedly connected to the test bolt 6, the washer part receives the downward extrusion force from the lower fixing block 5. When the extrusion force gradually increases to a certain value, the washer part and the nut part are separated. The complete test curve can be obtained through the tensile testing machine 1. The operation is simple and the detection accuracy is high.

[0037] In this embodiment, a first through-hole 43 is formed in the upper fixing block 4. A ring-shaped first shoulder 41 is formed on the upper side of the first through-hole 43. The test bolt 6 is inserted into the upper fixing block 4 through the first through-hole 43. The nut part of the test bolt 6 is located in the first shoulder 41. A second groove 42 is formed on the side wall of the first shoulder 41. The second shoulder 42 is hexagonal. A first limiting block 7 is inserted into the second shoulder 42. The outer side surface of the first limiting block 7 is hexagonal. A first limiting hole 71 is formed in the first limiting block 7. The nut of the test bolt 6 is inserted into the first limiting hole 71 and matches the first limiting hole 71.

[0038] A hexagonal second shoulder 42 is provided in the upper fixing block 4. The matching first limiting block 7 is snapped into the second shoulder 42. Since the first limiting block 7 is also provided with a first limiting hole 71 that matches the nut of the test bolt 6, after installing the first limiting block 7, the deflection of the test bolt 6 during the tensile test can be restricted, so that the test bolt 6 always bears axial force, improving the accuracy of the test.

[0039] Preferably, the lower side surface of the second limiting block 8 is flush with the lower side surface of the lower fixing block 5, so that the washer of the nut with washer can contact the lower side surfaces of the second limiting block and the lower fixing block at the same time, ensuring uniform force.

[0040] In this embodiment, a third shoulder 51 is provided on the lower side of the second perforation 52. The third shoulder 51 is hexagonal in shape. A second limiting block 8 is inserted into the third shoulder 51. The outer side surface of the second limiting block 8 is hexagonal in shape. A second limiting hole 81 is provided on the second limiting block 8. The nut of the pad nut 61 is inserted into the second limiting hole 81 and is matched with the second limiting hole 81.

[0041] A hexagonal third shoulder 51 is provided in the lower fixing block 5. The matching second limiting block 8 is snapped into the third shoulder 51. Since the second limiting block 8 is also provided with a second limiting hole 81 that matches the pad nut 61, after the second limiting block 8 is installed, it can prevent the pad nut 61 from deflecting during the tensile test, keeping the pad nut 61 always axially stressed and further improving the accuracy of the test.

[0042] Preferably, the upper side surface of the first limiting block 7 extends out of the top of the second shoulder 42. Since the first limiting block 7 protrudes from the upper fixing block 4, it is convenient for direct disassembly and assembly.

[0043] In addition, by replacing the first limiting block 7 and the second limiting block 8, different specifications of test bolts 6 and pad nuts 61 can be adapted, improving the scope of application.

[0044] Embodiment 2:

[0045] As Figures 5-6 shown, upper limiting inclined blocks 211 are respectively provided on the lower side walls of the upper grooves 21 on both sides of the upper perforation 22. The heights of the upper limiting inclined blocks 211 decrease sequentially from front to back. Lower limiting inclined blocks 311 are respectively provided on the upper side walls of the lower grooves 31 on both sides of the lower perforation 32. The heights of the lower limiting inclined blocks 311 decrease sequentially from front to back.

[0046] By providing the upper limiting inclined blocks 211, a limiting effect can be exerted on the upper fixing block 4 to prevent the upper fixing block 4 from sliding out of the upper groove 21 after being stressed. Similarly, the lower limiting inclined blocks 311 can exert a limiting effect on the lower fixing block 5 to prevent the lower fixing block 5 from sliding out of the lower groove 31 after being stressed.

[0047] Embodiment 3:

[0048] As Figures 7-8 shown, upper notch grooves 212 are horizontally provided on the front side surfaces of the upper clamping blocks 2 on both sides of the upper groove 21. Upper fixing bolts 213 are horizontally inserted into the upper notch grooves 212. The upper fixing bolts 213 extend out of one of the upper notch grooves 212 and are threadedly connected with upper fixing nuts 214 at their ends.

[0049] On the front sides of the lower clamping blocks 3 on both sides of the lower groove 31, lower notch grooves 312 are horizontally formed. A lower fixing bolt 313 is horizontally inserted into the lower notch groove 312. The lower fixing bolt 313 extends out of one of the lower notch grooves 312 and a lower fixing nut 314 is threadedly connected to the end thereof.

[0050] After the upper fixing block 4 is located at the central position in the upper groove 21, by adjusting the position of the upper fixing bolt 213 in the upper notch groove 212, the upper fixing bolt 213 is brought close to and in contact with the upper fixing block 4, and then by tightening the upper fixing nut 214, the upper fixing bolt 213 is fixed at the current position to play a limiting role thereon; similarly, after the lower fixing block 5 is located at the central position in the lower groove 31, by adjusting the position of the lower fixing bolt 313 in the lower notch groove 312, the lower fixing bolt 313 is brought close to and in contact with the lower fixing block 5, and then by tightening the lower fixing nut 314, the lower fixing bolt 313 is fixed at the current position to play a limiting role thereon; due to the settings of the upper notch groove 212 and the lower notch groove 312, the upper fixing bolt 214 and the lower fixing bolt 314 are convenient to disassemble.

Claims

1. A tensile test tool for a washer nut, characterized in that: include: An upper clamping block (2) and a lower clamping block (3) are symmetrically arranged in an upper and lower direction, and an upper groove (21) and a lower groove (31) are respectively provided on the front side surfaces of the upper clamping block (2) and the lower clamping block (3), and an upper through hole (22) and a lower through hole (32) are respectively provided on the opposite side surfaces of the upper clamping block (2) and the lower clamping block (3); An upper fixing block (4), the upper fixing block (4) being placed in an upper groove (21) above the upper through hole (22), a test bolt (6) being inserted into the upper fixing block (4), the lower end of the test bolt (6) passing through the upper through hole (22) and the lower through hole (32) at one time and extending into the lower groove (31); A lower fixing block (5), wherein the lower fixing block (5) is arranged in a lower groove (31) below the lower through hole (32), and a second through hole (52) is opened on the lower fixing block (5), and the lower end of the test nut (6) passes through the second through hole (52) and the end is threadedly connected with a nut with a washer (61), and the nut part of the nut with a washer (61) is located in the second through hole (52), and the gasket part of the nut with a washer (61) contacts the lower side surface of the lower fixing block (5).

2. The tensile test tool for the washer nut according to claim 1, characterized in that: A third concave shoulder (51) is provided on the lower side of the second through hole (52), the third concave shoulder (51) is in a hexagonal shape, a second limiting block (8) is inserted in the third concave shoulder (51), the outer side surface of the second limiting block (8) is in a hexagonal shape, a second limiting hole (81) is provided on the second limiting block (8), and the nut of the nut with a washer (61) is inserted in the second limiting hole (81) and matches the second limiting hole (81).

3. The tensile test tool for the washer nut according to claim 2, characterized in that: The lower side surface of the second limiting block (8) is flush with the lower side surface of the lower fixing block (5).

4. The tensile test tool for the washer nut according to claim 1, characterized in that: The upper fixing block (4) is provided with a first through hole (43), the upper side of the first through hole (43) is provided with an annular first recessed shoulder (41), the test bolt (6) is inserted into the upper fixing block (4) through the first through hole (43), and the nut portion of the test bolt (6) is located in the first recessed shoulder (41).

5. The tensile test tool for the washer nut according to claim 4, characterized in that: A second groove (42) is provided on the side wall of the first concave shoulder (41); the second concave shoulder (42) is hexagonal in shape; a first limiting block (7) is inserted into the second concave shoulder (42); the outer side surface of the first limiting block (7) is hexagonal in shape; a first limiting hole (71) is provided on the first limiting block (7); a nut of the test bolt (6) is inserted into the first limiting hole (71) and matches the first limiting hole (71).

6. The tensile test tool for the washer nut according to claim 5, characterized in that: The upper side surface of the first limiting block (7) extends out of the top of the second concave shoulder (42).

7. The tensile test tool for the washer nut according to claim 1, characterized in that: Upper limit inclined blocks (211) are respectively provided on the lower side walls of the upper groove (21) on both sides of the upper through hole (22), and the height of the upper limit inclined blocks (211) decreases from front to back. Lower limit inclined blocks (311) are respectively provided on the upper side walls of the lower groove (31) on both sides of the lower through hole (32), and the height of the lower limit inclined blocks (311) decreases from front to back.

8. The tensile test tool for a washer nut according to claim 1, characterized in that: Upper notch grooves (212) are provided on the front side surfaces of the upper clamping block (2) on both sides of the upper groove (21), and upper fixing bolts (213) are horizontally inserted into the upper notch grooves (212). The upper fixing bolt (213) extends out of one of the upper notch grooves (212) and has an upper fixing nut (214) threadedly connected to the end thereof.

9. The tensile test tool for a washer nut according to claim 1, characterized in that: The front side surfaces of the lower clamping block (3) on both sides of the lower groove (31) are both provided with lower notch grooves (312), and lower fixing bolts (313) are horizontally inserted into the lower notch grooves (312). The lower fixing bolt (313) extends out of one of the lower notch grooves (312) and has a lower fixing nut (314) threadedly connected to the end thereof.

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