Tool for testing friction coefficient of clamping piece nut

Abstract

The utility model relates to the technical field of nut testing, and discloses a tool for testing the friction coefficient of a clamping piece nut, which comprises a friction coefficient machine postposition tool, a mounting seat is arranged in the friction coefficient machine postposition tool, a mounting groove is arranged on the other side of the mounting seat, two clamping seats are arranged in the mounting groove in a sliding manner, and the clamping seats are arranged in the mounting groove in a sliding manner. A clamp is installed between the two clamping seats, a clamping piece nut is clamped in the clamp, and a third through hole corresponding to the clamping piece nut is formed in the middle of one side of the clamp. The position of the clamping piece nut can be preliminarily limited through the arranged clamps, the clamps of different sizes can be fixed in the mounting base through the two arranged clamping bases, and meanwhile the mounting base can be fixedly mounted in the rear tool of the friction coefficient machine. The friction coefficient machine rear tool is mounted on the friction coefficient machine, so that the friction coefficient of the clamped clamping piece nut can be tested.

Description

Technical Field

[0001] This utility model relates to the field of nut testing technology, specifically a tooling for testing the friction coefficient of clamp nuts. Background Technology

[0002] During construction and installation, high-strength bolts play a vital role as fasteners for connection. Among them, friction-type high-strength bolts are the most widely used. Friction-type high-strength bolts ensure that the connected steel plates are compressed by applying a pre-tension force in the axial direction of the high-strength bolt, and the connection reliability is ensured by the friction force of the contact surface. Therefore, the friction coefficient test of high-strength bolts is particularly important before construction.

[0003] The coefficient of friction of fasteners is usually tested using a coefficient of friction machine. The coefficient of friction machine is usually used to fix and test ordinary nuts. However, the wedge nut is a special type of fastener that requires a specific tooling fixture to fit the back fixture on the coefficient of friction machine, thereby limiting the position of the wedge nut.

[0004] In order to better address the above problems, promote the development of industry technology, and enhance core competitiveness, this application proposes a new compositional structure that differs from existing technologies. Utility Model Content

[0005] The purpose of this invention is to provide a tooling for testing the friction coefficient of a clamping nut, which has the effect of fixing the clamping nut.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a tooling for testing the friction coefficient of a clamping nut, comprising a friction coefficient machine back fixture, wherein a mounting seat is provided inside the friction coefficient machine back fixture, a through hole two is provided in the middle of one side of the mounting seat, a mounting groove is provided on the other side of the mounting seat, two clamping seats are slidably provided inside the mounting groove, a clamp is installed between the two clamping seats, a clamping nut is engaged inside the clamp, and a through hole three corresponding to the clamping nut is provided in the middle of one side of the clamp.

[0007] A further feature of this invention is that a through hole corresponding to the clamping nut is provided in the middle of one side of the friction coefficient machine rear fixture, and an installation hole is provided on the surface of the friction coefficient machine rear fixture near the outer ring.

[0008] A further feature of this invention is that the rear fixture of the friction coefficient machine is internally fixed with two symmetrical mounting rods, and the side of the mounting base is provided with positioning grooves corresponding to the mounting rods.

[0009] A further feature of this invention is that the end of the mounting rod is provided with an external thread, and a fixing nut is provided on the surface of the external thread.

[0010] A further feature of this invention is that: the inner side of the mounting groove is provided with a movable groove that is slidably connected to the clamping seat; the outer side of the mounting seat is provided with a guide groove that communicates with the movable groove; the outer side of the clamping seat is fixedly provided with a limiting screw that moves in the guide groove; and the end of the limiting screw is threaded with a limiting nut.

[0011] A further feature of this invention is that the clamp has a slot inside, and the clamping nut is engaged and installed inside the slot.

[0012] In summary, the present invention has the following beneficial effects: the present invention can initially limit the position of the clamping nut by setting the clamp, and can fix clamps of different sizes inside the mounting base by setting two clamping seats. At the same time, the mounting base can be fixedly installed inside the rear fixture of the friction coefficient machine. By installing the rear fixture of the friction coefficient machine on the friction coefficient machine, the friction coefficient of the clamped clamping nut can be tested. Attached Figure Description

[0013] Figure 1 This is one of the three-dimensional structural schematic diagrams of this utility model;

[0014] Figure 2 This is the second three-dimensional structural schematic diagram of the present invention;

[0015] Figure 3 This is a schematic diagram of the exploded structure of this utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the friction coefficient measuring device rear mount of this utility model;

[0017] Figure 5 This is one of the structural schematic diagrams of the mounting base of this utility model;

[0018] Figure 6 This is the second structural schematic diagram of the mounting base of this utility model;

[0019] Figure 7 This is a schematic diagram of the structure of the clamp of this utility model.

[0020] In the diagram: 1. Friction coefficient machine rear fixture; 101. Mounting hole; 102. Through hole one; 103. Mounting rod; 104. External thread; 105. Fixing nut; 2. Mounting seat; 201. Positioning groove; 202. Mounting groove; 203. Moving groove; 204. Guide groove; 205. Clamping seat; 206. Limiting screw; 207. Limiting nut; 208. Through hole two; 3. Fixture; 301. Slot; 302. Through hole three; 4. Clamping nut. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings of the embodiments thereof.

[0022] Please see Figures 1-7 In this embodiment of the present invention, a tooling for testing the friction coefficient of a clamping nut includes a friction coefficient machine back fixture 1, which is mounted on the friction coefficient machine. The back fixture 1 has a mounting base 2 inside, with a through hole 208 in the middle of one side and a mounting groove 202 on the other side. Two clamping seats 205 are slidably arranged inside the mounting groove 202, which clamp and limit the internal clamping fixture 3. A clamping fixture 3 is installed between the two clamping seats 205, and a clamping nut 4 is engaged inside the clamping fixture 3, initially limiting the position of the clamping nut 4. A through hole 302 corresponding to the clamping nut 4 is provided in the middle of one side of the clamping fixture 3, which does not interfere with the passage of bolts, thus not affecting the friction coefficient test of the clamping nut 4.

[0023] In this embodiment, preferably, the middle part of one side of the friction coefficient machine rear mount 1 is provided with a through hole 102 corresponding to the clamp nut 4, which does not interfere with the passage of the bolt. The surface of the friction coefficient machine rear mount 1 is provided with a mounting hole 101 near the outer ring. The mounting hole 101 can be used to facilitate the quick installation of the friction coefficient machine rear mount 1 onto the friction coefficient machine to perform friction force testing on the clamp nut 4.

[0024] In this embodiment, preferably, two symmetrical mounting rods 103 are fixedly provided inside the friction coefficient machine rear mount 1, and the side of the mounting seat 2 is provided with a positioning groove 201 corresponding to the mounting rod 103. When the mounting seat 2 is installed inside the friction coefficient machine rear mount 1, the positioning groove 201 on the side of the mounting seat 2 engages with the surface of the mounting rod 103 to limit the position of the friction coefficient machine rear mount 1.

[0025] In this embodiment, preferably, the end of the mounting rod 103 is provided with an external thread 104, and the surface of the external thread 104 is provided with a fixing nut 105. The position of the mounting seat 2 is further defined by the threaded engagement between the fixing nut 105 and the external thread 104 at the end of the mounting rod 103.

[0026] In this embodiment, preferably, the inner side of the mounting groove 202 is provided with a movable groove 203 that is slidably connected to the clamping seat 205. The sliding fit between the movable groove 203 and the clamping seat 205 guides and limits the movement of the clamping seat 205. The outer side of the mounting seat 2 is provided with a guide groove 204 that communicates with the movable groove 203. The outer side of the clamping seat 205 is fixedly provided with a limiting screw 206 that moves in the guide groove 204. The end of the limiting screw 206 is threaded with a limiting nut 207. The threaded fit between the limiting nut 207 and the limiting screw 206 limits the position of the clamping seat 205, thereby clamping and limiting the internal clamping nut 4.

[0027] In this embodiment, preferably, the clamp 3 has a slot 301 inside, and the clamping nut 4 is engaged and installed inside the slot 301, thereby limiting the position of the clamping nut 4 by installing it inside the slot 301.

[0028] In use, first select the clamp 3 of the corresponding size, and install the clamping nut 4 into the slot 301 of the clamp 3. Then, install the clamp 3 with the clamping nut 4 installed into the mounting slot 202 of the mounting base 2. Adjust the position of the two clamping seats 205 so that the screw hole of the clamping nut 4 corresponds to the through hole 208 on the mounting base 2. Then, tighten the limiting nut 207 on the limiting screw 206. The position of the clamping seats 205 is limited by the cooperation between the limiting nut 207 and the limiting screw 206, so that the two clamping seats 205 clamp each other. The position of fixture 3 is defined, and then the mounting base 2 is installed into the interior of the rear fixture 1 of the friction coefficient machine, so that the positioning groove 201 on the side of the mounting base 2 engages with the mounting rod 103 inside the rear fixture 1 of the friction coefficient machine, thus initially defining the position of the mounting base 2. Then, the fixing nut 105 is tightened, and the position of the mounting base 2 is initially defined by the engagement of the fixing nut 105 with the external thread 104 on the end of the mounting rod 103. Finally, the rear fixture 1 of the friction coefficient machine is installed on the friction coefficient machine, and the friction coefficient of the clamped clip nut 4 is tested.

[0029] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A fixture for testing the friction coefficient of a clamping nut, comprising a friction coefficient testing fixture (1), characterized in that, The friction coefficient machine rear fixture (1) is provided with a mounting base (2) inside. A through hole (208) is provided in the middle of one side of the mounting base (2). A mounting groove (202) is provided on the other side of the mounting base (2). Two clamping seats (205) are slidably provided inside the mounting groove (202). A clamp (3) is installed between the two clamping seats (205). A clamping nut (4) is engaged inside the clamp (3). A through hole (302) corresponding to the clamping nut (4) is provided in the middle of one side of the clamp (3).

2. The tooling for testing the friction coefficient of a clamping nut according to claim 1, characterized in that: The friction coefficient machine rear mount (1) has a through hole (102) in the middle of one side, corresponding to the clamping nut (4), and the friction coefficient machine rear mount (1) has a mounting hole (101) near the outer ring on its surface.

3. The tooling for testing the friction coefficient of a clamping nut according to claim 1, characterized in that: The friction coefficient machine rear fixture (1) is internally fixed with two symmetrical mounting rods (103), and the mounting base (2) has a positioning groove (201) on its side corresponding to the mounting rods (103).

4. The tooling for testing the friction coefficient of a clamping nut according to claim 3, characterized in that: The end of the mounting rod (103) is provided with an external thread (104), and the surface of the external thread (104) is provided with a fixing nut (105).

5. The tooling for testing the friction coefficient of a clamping nut according to claim 1, characterized in that: The inner side of the mounting groove (202) is provided with a movable groove (203) that is slidably connected to the clamping seat (205). The outer side of the mounting seat (2) is provided with a guide groove (204) that communicates with the movable groove (203). The outer side of the clamping seat (205) is fixedly provided with a limiting screw (206) that moves in the guide groove (204). The end of the limiting screw (206) is threaded with a limiting nut (207).

6. The tooling for testing the friction coefficient of a clamping nut according to claim 1, characterized in that: The clamp (3) has a slot (301) inside, and the clamp nut (4) is engaged and installed inside the slot (301).

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