A hexagonal fastening structure for testing tool thread protection

Abstract

The utility model relates to the technical field of steering systems, and specifically to a hexagonal fastening structure for testing tool thread protection. A hexagonal fastening structure for testing tool thread protection includes a workpiece fixture, which is characterized in that: a plurality of hexagonal countersunk holes are provided on the upper end surface of the workpiece fixture, and transition holes are respectively provided on the six corners of the hexagonal countersunk holes, and steel sleeve nuts are embedded in the hexagonal countersunk holes, and the top bolts are connected in the steel sleeve nuts; a plurality of countersunk screw holes are provided on the lower end surface of the workpiece fixture, and the bottom bolts are connected in the countersunk screw holes. Compared with the prior art, a hexagonal fastening structure for testing tool thread protection is provided, which perfectly and efficiently solves the shortcomings of ordinary threaded sockets on the market. In the use of test tooling, the tooling test efficiency and service life are greatly improved, and the installation and disassembly process is simple, the fixation is reliable, and the test is efficient, accurate and practical.

Description

Technical Field

[0001] The utility model relates to the technical field of steering systems, in particular to a hexagonal fastening structure for testing tool thread protection. Background Art

[0002] The performance of the automotive steering column must be tested in the laboratory at the beginning of product development to meet the needs of the whole vehicle. Traditional tooling is to tap the threaded hole on the fixture, and after the product is placed on the fixture, it is tightened and fixed with standard bolts. Since the product fixtures are mostly made of aluminum alloy or iron, the thread strength of the product fixture is lower than that of the tightening bolt. Due to the high frequency of use of the fixture, or improper operation by people during the installation and tightening of the bolts, the fixture thread will be damaged, making the fixture unusable. In order to solve this problem, the hexagonal thread fastening device is designed. Summary of the invention

[0003] In order to overcome the deficiencies of the prior art, the utility model provides a hexagonal fastening structure for testing tool thread protection, and the high-frequency service life of the testing tool thread and the product installation and fastening requirements are achieved through the design.

[0004] In order to achieve the above-mentioned purpose, a hexagonal fastening structure for testing tool thread protection is designed, including a workpiece clamp, which is characterized in that: a plurality of hexagonal countersunk holes are provided on the upper end surface of the workpiece clamp, and transition holes are respectively provided on the six corners of the hexagonal countersunk holes, and steel sleeve nuts are embedded in the hexagonal countersunk holes, and top bolts are connected to the steel sleeve nuts; a plurality of countersunk screw holes are provided on the lower end surface of the workpiece clamp, and bottom bolts are connected to the countersunk screw holes.

[0005] The bottom of the hexagonal countersunk hole is adjacent to the bottom of the countersunk screw hole.

[0006] The hexagonal countersunk holes are located around the workpiece fixture.

[0007] The transition hole is a circular hole, and the depth of the transition hole is consistent with the depth of the hexagonal countersunk hole.

[0008] The steel sleeve nut is a hexagonal cylindrical structure, and a through hole is arranged in the middle of the steel sleeve nut, and an internal thread connected with the top bolt is arranged in the through hole.

[0009] Compared with the prior art, the utility model provides a hexagonal fastening structure for testing tool thread protection, which perfectly and efficiently solves the shortcomings of ordinary threaded sockets on the market. In the use of test tooling, the test efficiency and service life of the tooling are greatly improved, and the installation and disassembly process is simple, the fixation is reliable, and the test is efficient, accurate and practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1It is a schematic diagram of the structure of the utility model.

[0011] Figure 2 for Figure 1 AA section view.

[0012] Figure 3 for Figure 1 Middle BB section view.

[0013] Figure 4 It is an enlarged schematic diagram of the hexagonal countersunk hole in the utility model.

[0014] Figure 5 It is a structural schematic diagram of the steel sleeve nut in the utility model. DETAILED DESCRIPTION

[0015] The utility model is further described below with reference to the accompanying drawings.

[0016] like Figures 1 to 5 As shown, a plurality of hexagonal countersunk holes 6 are provided on the upper end surface of the workpiece fixture 1, and transition holes 2 are respectively provided on the six corners of the hexagonal countersunk holes 6. A steel sleeve nut 3 is embedded in the hexagonal countersunk hole 6, and a top bolt 4 is connected to the steel sleeve nut 3; a plurality of countersunk screw holes are provided on the lower end surface of the workpiece fixture 1, and a bottom bolt 5 is connected to the countersunk screw hole.

[0017] The bottom of the hexagonal countersunk hole 6 is adjacent to the bottom of the countersunk screw hole.

[0018] The hexagonal countersunk holes 6 are located around the workpiece fixture 1 .

[0019] The transition hole 2 is a circular hole, and the depth of the transition hole 2 is consistent with the depth of the hexagonal counterbore 6 .

[0020] The steel sleeve nut 3 is a hexagonal cylindrical structure, and a through hole is provided in the middle of the steel sleeve nut 3 , and an internal thread connected to the top bolt 4 is provided in the through hole.

[0021] In order to improve the operating efficiency and test life of the product fixture, a hexagonal steel sleeve nut 3 is designed and manufactured, a hexagonal countersunk hole 6 is opened on the workpiece fixture 1, and a circular transition hole 2 is opened on the hexagonal corner of the hexagonal countersunk hole 6. A countersunk threaded hole is opened opposite the hexagonal countersunk hole 6. The hexagonal steel sleeve nut 3 is placed in the hexagonal countersunk hole 6, and the steel sleeve nut 3 is tightened with a standard top bolt 4 to fix the product, and a standard bottom bolt 5 is used to thread the countersunk threaded hole.

[0022] The hexagonal steel sleeve nut of the utility model is made of high-quality steel material, which can improve the strength of the fastening internal thread; the hexagonal matching structure, such a structural nut bears the rotational torque from the bolt fastening process, the steel sleeve nut is in evenly distributed surface contact with the six sides of the workpiece clamp, the load is uniform, and the fastening characteristics are improved; the circular transition hole is opened at the vertex of the hexagonal countersunk hole of the workpiece clamp, which is used to release the interface stress from the hexagonal surface contact rotation process, and prevent the load cracking caused by stress concentration at the corner of the workpiece clamp; the purpose of opening the countersunk threaded hole is that if there is a problem with the hexagonal steel sleeve nut, the bottom bolt at the countersunk threaded hole below can be used to push the hexagonal steel sleeve nut upward, so as to facilitate disassembly and replacement.

[0023] The utility model perfectly and efficiently solves the shortcomings of ordinary threaded sockets on the market. Compared with the existing solutions on the market, the utility model has an innovative design, simple operation, firm and reliable, convenient and practical. The device is used for the fastening solution test of tooling, which greatly improves the test efficiency and service life of tooling, and points out the direction for product problem analysis and design verification.

Claims

1. A hexagonal fastening structure for testing tool thread protection, comprising a workpiece fixture, characterized in that: A plurality of hexagonal countersunk holes (6) are provided on the upper end surface of the workpiece fixture (1), and transition holes (2) are respectively provided at the six corners of the hexagonal countersunk holes (6). A steel sleeve nut (3) is embedded in the hexagonal countersunk hole (6), and a top bolt (4) is connected to the steel sleeve nut (3); a plurality of countersunk screw holes are provided on the lower end surface of the workpiece fixture (1), and a bottom bolt (5) is connected to the countersunk screw holes.

2. A hexagonal fastening structure for testing tool thread protection according to claim 1, characterized in that: The bottom of the hexagonal countersunk hole (6) is adjacent to the bottom of the countersunk screw hole.

3. A hexagonal fastening structure for testing tool thread protection according to claim 1 or 2, characterized in that: The hexagonal countersunk holes (6) are located around the workpiece fixture (1).

4. A hexagonal fastening structure for testing tool thread protection according to claim 1, characterized in that: The transition hole (2) is a circular hole, and the depth of the transition hole (2) is consistent with the depth of the hexagonal countersunk hole (6).

5. The hexagonal fastening structure for testing tool thread protection according to claim 1, characterized in that: The steel sleeve nut (3) is a hexagonal cylindrical structure, and a through hole is provided in the middle of the steel sleeve nut (3), and an internal thread connected to the top bolt (4) is provided in the through hole.

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