Special tool for bolt pull-off test

Abstract

The utility model discloses a special tool for a bolt pull-off test, and relates to the technical field of bolt pull-off tests, the special tool comprises a base and a bolt, the upper surface of the base is fixedly connected with a workbench, the upper surface of the workbench is provided with a groove, the two sides of the interior of the groove are provided with sliding grooves, and the sliding grooves are connected with the base. Two sliding grooves are formed in the upper surface of the base, baffles are slidably arranged in the two sliding grooves, a cavity is formed in the workbench, an adjusting mechanism is arranged in the cavity, the two baffles move through the adjusting mechanism, a U-shaped plate is fixedly connected to the upper surface of the base, and a tensile machine is fixedly connected to the lower surface of the U-shaped plate. And the output end of the tensile machine is fixedly connected with a concentric-square-shaped plate. The gear is rotated by rotating the knob, then the two racks are driven to be close to or far away from each other, then the two baffles can be driven by the two connecting rods to move, and therefore the head of a bolt can be blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt pull-off testing, in particular to a special tooling for bolt pull-off testing. Background Art

[0002] Bolts are a general term for fasteners. During the production process of bolts, they usually need to be subjected to pull-off tests. The principle of the bolt pull-off test is to measure the tensile strength and shear strength of the bolt by applying tensile force.

[0003] After searching, a special tooling for bolt pull-off test with publication number CN219657362U was found. It includes a sample connection block, an upper cover plate, a first clamping plate, a clamping head and a lower cover plate. The present application is designed with a sample connection block, a second through hole is provided in the center, and the test sample and the sample connection block are fastened and connected by the bolt to be tested passing through the first through hole and the second through hole.

[0004] However, the existing special tooling for bolt pull-off testing cannot perform pull-off tests on bolts of different sizes, so there are certain limitations in actual use, which greatly affects the efficiency of the pull-off test. Utility Model Content

[0005] In view of the above problems existing in the existing special tooling for bolt pull-off testing, the present utility model is proposed.

[0006] Therefore, the purpose of the utility model is to provide a special tool for bolt pull-off test, which solves the problem that the existing special tool for bolt pull-off test cannot perform pull-off test on bolts of different sizes, thereby having certain limitations in actual use, greatly affecting the efficiency of the pull-off test.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A special tooling for bolt pull-off testing comprises a base and a bolt, wherein the upper surface of the base is fixedly connected to a workbench, the upper surface of the workbench is provided with a groove, both sides of the groove are provided with slide grooves, baffles are slidably arranged inside the two slide grooves, a cavity is provided inside the workbench, an adjustment mechanism is provided inside the cavity, and the two baffles are moved by the adjustment mechanism, the upper surface of the base is fixedly connected to a U-shaped plate, the lower surface of the U-shaped plate is fixedly connected to a tensile testing machine, the output end of the tensile testing machine is fixedly connected to a "return"-shaped plate, the lower surface of the "return"-shaped plate is rotatably connected to a rotating shaft, the lower end of the rotating shaft is fixedly connected to a circular plate, the lower surface of the circular plate is provided with a plurality of internal threaded holes, and the bolts are spirally arranged inside the corresponding internal threaded holes.

[0009] Preferably, the adjustment mechanism includes a rotating rod, a gear, two racks, two connecting rods and a knob, the rotating rod is rotatably connected to the inside of the cavity, the gear is fixedly sleeved on the rod wall of the rotating rod, the two racks are respectively engaged with the two ends of the gear, the two connecting rods are respectively fixedly connected to one end of the corresponding racks, the two racks pass through the upper surface of the cavity and are fixedly connected to the lower surface of the corresponding baffle, and one end of the rotating rod passes through the side wall of the cavity and is fixedly connected to the knob.

[0010] Preferably, a placement groove is provided on the lower surface of the “U”-shaped plate, and the placement groove matches the bolt.

[0011] Preferably, two strip-shaped holes are respectively provided between the cavity and the two slide grooves, and the two strip-shaped holes are matched with corresponding connecting rods respectively.

[0012] Preferably, the size of each of the internal threaded holes is different.

[0013] Preferably, the outer surface of the tensile machine is provided with a dial, and the dial matches the tensile machine.

[0014] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0015] 1. The utility model rotates the knob to rotate the gear, which then drives the two racks to move closer to or farther from each other, and then uses two connecting rods to drive the two baffles to move, thereby blocking the head of the bolt.

[0016] 2. The utility model rotates the circular plate so that the internal threaded hole corresponding to the bolt is located above the prevention groove, and then the bolt can be screwed into the internal threaded hole. At the same time, since the size of each internal threaded hole is different, it is convenient to install bolts of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0018] Figure 1 It is a structural schematic diagram of the utility model;

[0019] Figure 2 It is a cross-sectional view of the utility model;

[0020] Figure 3 For the utility model Figure 1 Bottom view of the middle circular plate;

[0021] Figure 4 For the utility model Figure 2 An enlarged schematic diagram of part A.

[0022] Description of reference numerals:

[0023] 1. Base; 2. Workbench; 3. Baffle; 4. U-shaped plate; 5. Tensile testing machine; 6. U-shaped plate; 7. Rotating shaft; 8. Round plate; 9. Bolt; 10. Rotating rod; 11. Gear; 12. Rack; 13. Connecting rod; 14. Knob; 15. Dial. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0025] The utility model embodiment discloses a special tool for bolt pull-off testing.

[0026] The utility model provides Figure 1-Figure 4 The special tooling for bolt pull-off test shown includes a base 1 and a bolt 9, the upper surface of the base 1 is fixedly connected to a workbench 2, the upper surface of the workbench 2 is provided with a groove, both sides of the groove are provided with slide grooves, baffles 3 are slidably arranged inside the two slide grooves, a cavity is provided inside the workbench 2, an adjustment mechanism is provided inside the cavity, and the two baffles 3 are moved by the adjustment mechanism, the upper surface of the base 1 is fixedly connected to a U-shaped plate 4, the lower surface of the U-shaped plate 4 is fixedly connected to a tensile testing machine 5, the output end of the tensile testing machine 5 is fixedly connected to a "return"-shaped plate 6, the lower surface of the "return"-shaped plate 6 is rotatably connected to a rotating shaft 7, the lower end of the rotating shaft 7 is fixedly connected to a circular plate 8, the lower surface of the circular plate 8 is provided with a plurality of internal threaded holes, and the bolts 9 are spirally arranged inside the corresponding internal threaded holes.

[0027] The bolt 9 is rotated to the inside of the corresponding internal threaded hole, and then the two baffles 3 can be moved and block the head of the bolt 9 through the adjustment mechanism, and then the tensile machine 5 is started to complete the pull-off test.

[0028] In order to move the two baffles 3, as Figure 1 , Figure 2 and Figure 4As shown, the adjustment mechanism includes a rotating rod 10, a gear 11, two racks 12, two connecting rods 13 and a knob 14. The rotating rod 10 is rotatably connected to the inside of the cavity. The gear 11 is fixedly sleeved on the rod wall of the rotating rod 10. The two racks 12 are respectively engaged with the two ends of the gear 11. The two connecting rods 13 are respectively fixedly connected to one end of the corresponding rack 12. The two racks 12 pass through the upper surface of the cavity and are fixedly connected to the lower surface of the corresponding baffle 3. One end of the rotating rod 10 passes through the side wall of the cavity and is fixedly connected to the knob 14. Two strip holes are respectively opened between the cavity and the two slide grooves, and the two strip holes are matched with the corresponding connecting rods 13.

[0029] The knob 14 is rotated to rotate the gear 12, which then drives the two racks 12 to move closer to or farther from each other. Then, the two connecting rods 10 can be used to drive the two baffles 3 to move, thereby blocking the head of the bolt 9.

[0030] In order to facilitate the installation of the bolt 9, Figure 1 , Figure 2 As shown, a placement groove is provided on the lower surface of the “U”-shaped plate 6 , and the placement groove matches the bolt 9 .

[0031] The circular plate 8 is rotated so that the internal threaded hole corresponding to the bolt 9 is located above the preventing groove, and then the bolt 9 can be screwed into the internal threaded hole.

[0032] In order to facilitate the installation of bolts 9 of different specifications, Figure 3 As shown, each internal threaded hole is different in size.

[0033] Since the size of each internal threaded hole is different, it is convenient to install bolts 9 of different specifications.

[0034] Finally, in order to display the tension conveniently, Figure 1 , Figure 2 As shown, a dial 15 is provided on the outer surface of the tensile machine 5 , and the dial 15 matches the tensile machine 5 .

[0035] The dial 15 can be used to display the tension generated by the tensile testing machine 5, so that the value of the tension when the bolt 9 is pulled off can be known.

[0036] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A special tool for bolt pull-off testing, comprising a base (1) and a bolt (9), characterized in that: The upper surface of the base (1) is fixedly connected to a workbench (2), the upper surface of the workbench (2) is provided with a groove, both sides of the groove are provided with slide grooves, baffles (3) are slidably arranged inside the two slide grooves, a cavity is provided inside the workbench (2), an adjustment mechanism is arranged inside the cavity, and the two baffles (3) are moved by the adjustment mechanism, the upper surface of the base (1) is fixedly connected to a U-shaped plate (4), the lower surface of the U-shaped plate (4) is fixedly connected to a tensile machine (5), the output end of the tensile machine (5) is fixedly connected to a "return"-shaped plate (6), the lower surface of the "return"-shaped plate (6) is rotatably connected to a rotating shaft (7), the lower end of the rotating shaft (7) is fixedly connected to a circular plate (8), the lower surface of the circular plate (8) is provided with a plurality of internal threaded holes, and the bolts (9) are spirally arranged inside the corresponding internal threaded holes.

2. The bolt pull-off test tool according to claim 1 is characterized in that: The adjustment mechanism comprises a rotating rod (10), a gear (11), two racks (12), two connecting rods (13) and a knob (14); the rotating rod (10) is rotatably connected to the inside of the cavity; the gear (11) is fixedly sleeved on the rod wall of the rotating rod (10); the two racks (12) are respectively meshed with the two ends of the gear (11); the two connecting rods (13) are respectively fixedly connected to one end of the corresponding racks (12); the two racks (12) both penetrate the upper surface of the cavity and are fixedly connected to the lower surface of the corresponding baffle (3); one end of the rotating rod (10) penetrates the side wall of the cavity and is fixedly connected to the knob (14).

3. The bolt pull-off test tool according to claim 1, characterized in that: The lower surface of the "U"-shaped plate (6) is provided with a placement groove, and the placement groove matches the bolt (9).

4. The bolt pull-off test tool according to claim 1, characterized in that: Two strip-shaped holes are respectively provided between the cavity and the two slide grooves, and the two strip-shaped holes are matched with corresponding connecting rods (13) respectively.

5. The bolt pull-off test tool according to claim 1, characterized in that: The sizes of each of the internal threaded holes are different.

6. The bolt pull-off test tool according to claim 1, characterized in that: The outer surface of the tensile machine (5) is provided with a dial (15), and the dial (15) matches the tensile machine (5).

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