CN221033573U

CN221033573U - Anti-disassembly structure of locking bolt and disassembly tool

Info

Publication number: CN221033573U
Application number: CN202322671297.1U
Authority: CN
Inventors: 罗琪; 毛宁; 万嘉磊
Original assignee: Dali Elsewhere Culture Communication Co ltd
Current assignee: Dali Elsewhere Culture Communication Co ltd
Priority date: 2023-10-07
Filing date: 2023-10-07
Publication date: 2024-05-28
Anticipated expiration: 2033-10-07

Abstract

The utility model relates to the technical field of bolts, in particular to a locking bolt anti-disassembly structure which is applied to a fixed object with a concave part and comprises a bolt, wherein the bolt comprises a screw rod part and a head part connected with the screw rod part, and threads are arranged on the screw rod part; the screw rod part is arranged in the concave part, and is connected with the first magnetic part through a screw rod part; the magnetic metal sheet is a sheet-shaped metal disc, and the outer diameter of the magnetic metal disc is matched with the diameter of the concave part of the fixed object. The technical scheme utilizes the first magnetic piece to generate magnetic attraction to the magnetic metal sheet, and the magnetic metal sheet is in clearance fit with the concave part of the fixed object, so that the locking and anti-disassembly effects can be achieved.

Description

Anti-disassembly structure of locking bolt and disassembly tool

Technical Field

The utility model relates to the technical field of bolts, in particular to a locking bolt anti-disassembly structure.

Background

Certain articles exist in production and life and have the function of preventing disassembly after being locked. Such as: the automobile license plate, outdoor electric power equipment, the overhead line tower, the public guard rail and the connecting structure for preventing theft require special tools (wrench and screwdriver), and the anti-theft or anti-disassembly function is lost when the special tools are commonly circulated. In addition, the special tool is complex in structure, high in processing cost, more in accessories, easy to lose the accessories or complex in assembly steps, and the working efficiency is reduced.

Chinese patent 90225087.6 discloses a nut and a special tool for preventing disassembly, wherein the nut has an internal thread matched with a screw, the external shape of the nut is a geometric table with taper, the top surface is a positive N-sided shape (N is an odd number), the bottom surface is circular, and the side surface is a natural transition (fusion) shape from the top surface to the bottom surface. The special tool comprises a sleeve head and a movable cock, wherein the sleeve head is matched with the shape of the nut, the shape of the sleeve head is a regular N prism (N is an even number), and the movable cock and the screw have the same internal thread.

When the anti-disassembly nut is used, the anti-disassembly nut is screwed on the required position of the screw, the special tool sleeve is sleeved on the anti-disassembly nut, the movable cock is screwed on the screw to enable the movable cock to prop against the sleeve, and the sleeve is screwed by the common spanner, so that the anti-disassembly nut is screwed. The structure is simple, the use is convenient, the anti-disassembling performance is reliable, and the common wrench is difficult to unscrew without the sleeve head and the movable cock. There is also a complex process, particularly the precision of the movable tap and the spigot fit.

Chinese patent CN 202431718U discloses an anti-disassembly bolt structure, including bearing seat, screw spare, pulling piece and overcoat, the screw spare head has the pulling groove, the pulling piece has the pulling point, the overcoat is with pulling piece, the screw spare cladding is on bearing seat, the pulling point cooperatees with the pulling groove, utilize the pulling point of pulling piece to dial the screw spare and lock the article, when continuing to force to twist, the pulling point is pushed out the destruction deformation and is left the pulling groove by the extrusion, after the article locking, the pulling point of pulling piece warp and releases the linkage relation to the screw spare, apply the operation of pulling again by the overcoat angular surface, can not act on the idle running action on the screw spare with the torsional strength, reach the article and prevent the effect of tearing open, this structure is applicable to the condition that no longer opens after the locking.

Chinese patent CN 210509913U discloses a prevent tearing open bolt structure, including screw rod and nut, the surface of screw rod is equipped with in proper order from top to bottom and overlaps to have gasket and nut, and the nut surface cover is equipped with can dismantle the piece, and the screw hole is seted up at the nut top, and it is corresponding with can dismantle the piece, can dismantle fast appearance and be the hexagon, is connected with the nut through the screw. This structural component is more, all need to pass through the screw fixation earlier when installing or dismantling and can dismantle the piece, and consumption time reduces work efficiency.

For the situation that the requirements on the flatness of the connecting surface are not high because the anti-disassembly bolt structure is concentrated on a large number, the head of the screw can protrude out of the upper part of the surface of the connected object, and for the situation that the surface is required to be kept flat, countersunk screws are usually used for connection, or stepped holes are formed in the surface of the connected object, at the moment, the head of the screw (bolt) is positioned in the holes, and the application of the anti-disassembly structure is limited.

Disclosure of utility model

The main purpose of the present utility model is to solve the above-mentioned technical problems.

According to the utility model, the utility model provides a locking bolt anti-disassembly structure which is applied to a fixed object with a concave part arranged above a fixed hole, and comprises a bolt, wherein the bolt comprises a screw rod part and a head part connected with the screw rod part, and threads are arranged on the screw rod part;

Wherein it also comprises

-A first magnetic member in the form of a circular cylinder, the first magnetic member being accommodated in the recess, the first magnetic member being centrally provided with a through hole for the screw portion to pass through;

-a magnetic metal sheet, which is a sheet-like metal disc, the outer diameter of which is adapted to the diameter of the recess of the object to be fixed.

Preferably, the joint of the screw part and the head part forms a conical surface, the top surface of the first magnetic part is provided with a groove to form a concave surface, and the concave surface is matched with the conical surface.

Preferably, the first magnetic member and the magnetic metal sheet are made of hard magnetic materials.

The utility model also provides a disassembling tool for the locking bolt disassembly preventing structure, which comprises a handle, a connecting rod connected with the handle, a connector connected with the end part of the connecting rod, and a second magnetic piece connected with the connector.

Preferably, the magnetic attraction force of the second magnetic piece to the magnetic metal sheet is larger than the magnetic attraction force of the first magnetic piece to the magnetic metal sheet.

The technical scheme of the utility model adopts a first magnetic piece which is provided with a circular ring shape and provided with a dish-shaped countersink (groove) between a bolt and a fixed object. The head of the bolt sinks into a first magnetic part counter bore (groove), the surface of the first magnetic part adsorbs the magnetic metal sheet, a concave part is processed on the surface of a fixed object, the depth ensures that the magnetic metal sheet can sink into the concave part just, and the upper surfaces of the magnetic metal sheet and the fixed object are flush. Meanwhile, the gap between the diameter of the magnetic metal sheet and the diameter of the concave part of the fixed object is controlled, so that the magnetic metal sheet cannot be taken out from the outside due to the non-destructive action of manpower, and the fastening and anti-dismantling effects are achieved.

Drawings

The drawings that accompany the description can be briefly described as follows, with reference to the embodiments or prior art descriptions, and are apparent for illustrative purposes only and are not intended to limit the scope of the utility model.

FIG. 1 is a perspective view of a lock bolt tamper evident structure in accordance with an embodiment of the present utility model;

FIG. 2 is a perspective view of a lock bolt tamper evident assembly in accordance with an embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a lock bolt tamper evident structure in accordance with an embodiment of the present utility model;

FIG. 4 is a perspective view of another first magnetic member according to an embodiment of the present utility model;

fig. 5 is a perspective view of a removal tool of the lock bolt anti-removal assembly in accordance with an embodiment of the present utility model.

Reference numerals illustrate:

1. A fixed object;

11. A concave portion; 12. a fixing hole;

2. The locking bolt anti-disassembly component;

21. A first magnetic member;

211. a side surface; 212. a top surface; 213. a through hole; 214. a concave surface;

211', a concave groove; 212', top surface; 213', through holes; 214', concave surface; 215', a first magnetic member;

22. a bolt;

221. A screw portion; 222. a head; 223. conical surface;

23. a magnetic metal sheet;

3. A detaching tool;

31. A handle; 32. a connecting rod; 33. a connector; 34. and a second magnetic member.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. It will be apparent that the described embodiments are some, but not all, of the embodiments of the present disclosure. All other embodiments, which can be made by one of ordinary skill in the art without the need for inventive faculty, are within the scope of the present disclosure, based on the described embodiments of the present disclosure.

The utility model provides a locking bolt anti-disassembly structure, and as shown in fig. 1 and 3, a locking bolt anti-disassembly assembly 2 comprises a first magnetic piece 21, a bolt 22 and a magnetic metal sheet 23.

The first magnetic member 21 is a metal material or a ceramic material having hard magnetic properties, such as high carbon steel, alnico, titanium cobalt, barium ferrite; the magnetic metal sheet 23 may be iron, nickel, cobalt, or a metal alloy (iron-nickel alloy, steel) having magnetism. It is understood that the materials of the first magnetic member 21 and the magnetic metal sheet 23 may be the same or different.

Referring to fig. 2 and 3, the first magnetic member 21 is a circular cylinder, the diameter of the circular cylinder is matched with the inner wall of the concave portion 11 of the fixed object 1, the top surface 212 of the circular cylinder (the first magnetic member 21) is provided with a concave surface 214 formed by a groove, the concave surface 214 is matched with the conical surface 223 of the head 222 of the bolt 22, and a through hole 213 is arranged in the center of the first magnetic member 21 for the screw portion 221 of the bolt 22 to pass through.

The bolts 22 are common bolts or common screws, and commercially available bolts or screws are applicable. Taking a countersunk bolt as an example, the bolt 22 comprises a screw portion 221 and a head portion 222 connected with the screw portion 221, a conical surface 223 is formed at the connection position of the screw portion 221 and the head portion 222, and the conical surface 223 is matched with the concave surface 214 of the first magnetic member 21.

In the above embodiment, the connection between the screw portion and the head portion may also form a vertical plane, and correspondingly, the top surface of the first magnetic member is matched with the vertical plane thereof.

The magnetic metal sheet 23 is a sheet-like metal disk, the outer diameter of which is adapted to the diameter of the recess 11 of the object 1 to be fixed.

For example, referring to fig. 3, when the locking bolt anti-disassembly assembly 2 is used, the fixing hole 12 of the fixed object 1 is aligned, the first magnetic piece 21 is placed in the concave portion 11 of the fixed object 1, a gap exists between the side surface 211 of the first magnetic piece 21 and the inner wall of the concave portion 11, then the bolt 22 passing through the through hole 213 of the first magnetic piece 21 is locked by a conventional tool (screwdriver, screwdriver or screwdriver), the fixed object 1 is locked, the conical surface 223 of the head 222 of the bolt 22 is contacted with the concave surface 214 of the first magnetic piece 21, after the fixed object 1 is locked, the magnetic metal piece 23 is placed above the head 222 of the bolt 22, because the magnetic metal piece 23 and the first magnetic piece 21 have magnetism, a magnetic attraction is formed in the concave portion 11, the diameter of the magnetic metal piece 23 is matched with the concave portion 11, and a small gap exists, and under normal circumstances, the magnetic metal piece 23 is difficult to be taken out, so that the anti-disassembly effect is achieved. When a magnet is used, the magnetic attraction force between the magnet and the magnetic metal sheet 23 is larger than the magnetic attraction force between the magnetic metal sheet 23 and the first magnetic member 21, so that the magnetic metal sheet 23 can be taken out.

Referring to fig. 4, the first magnetic member 215 'is a circular ring, and is sleeved on a metal housing, the metal housing is a circular cylinder, a concave groove 211' is formed at the outer side of the circular cylinder for Rong She the first magnetic member 215', a through hole 213' is formed at the center of the circular cylinder for the screw portion 221 of the bolt 22 to pass through, a concave surface 214 'is formed at the top surface 212' of the circular cylinder, the concave surface 214 'is matched with a conical surface 223 (or a vertical plane) formed at the connection position of the screw portion 221 of the bolt 22 and the head 222, the metal housing can protect the first magnetic member 215', particularly when the first magnetic member 215 'is made of brittle materials, the structure can widen the material selection range of the first magnetic member 215', and can select ferrite magnets with lower cost.

The application also discloses a disassembling tool for the locking bolt disassembling prevention assembly in the embodiment, and referring to fig. 5, the disassembling tool 3 comprises a handle 31, a connecting rod 32 connected with the handle, a connector 33 connected with the end of the connecting rod, and a second magnetic piece 34 connected with the connector.

The handle 31, the connecting rod 32 and the connector 33 can be an integral body or can be formed by split combination.

The second magnetic member 34 may be a hard magnetic metal material or a ceramic material (strong magnet), or may be an electromagnet, and generates a magnetic field by using the magnitude of the current. The magnetic attraction force of the second magnetic piece 34 to the magnetic metal sheet 23 is larger than the magnetic attraction force of the first magnetic piece 21 to the magnetic metal sheet 23.

The electromagnet, which generates a strong magnetic field by using the current, belongs to the prior art, and is not described here.

The invention adds a first magnetic piece 21 with a circular ring-shaped countersink (concave) between the bolt 22 and the fixed object 1. The head 222 of the bolt 22 is sunk into a counter bore (concave surface) of the first magnetic part 21, the surface of the first magnetic part 21 adsorbs the magnetic metal sheet 23, the surface of the fixed object 1 is processed with the concave part 11, the depth just ensures that the magnetic metal sheet 23 can sink into the concave part 11, and the upper surfaces of the two are flush. At the same time, the diameter of the magnetic metal sheet 23 and the diameter gap of the concave part 11 of the fixed object 1 are controlled, so that the magnetic metal sheet 23 cannot be taken out from the outside due to the non-destructive action of manpower.

When the bolt 22 needs to be disassembled, the magnetic metal sheet 23 adsorbed on the surface of the first magnetic piece 21 needs to be firstly taken out by using the disassembling tool 3, the disassembling tool 3 is provided with a second magnetic piece 34 with magnetic force larger than that of the first magnetic piece 21, the second magnetic piece 34 is fixed on the connecting head 33, and the difficulty of directly and vertically taking the magnetic metal sheet 23 by manpower is high due to strong adsorption force between the first magnetic piece 21 and the second magnetic piece 34, so that the handle 31 is used for lifting upwards. Because the second magnetic member 34 has a larger attraction force than the first magnetic member 21, when the handle 31 is pulled up by a hand, the magnetic metal sheet 23 can be taken out, and finally the bolt 22 is detached.

Claims

1. The locking bolt anti-disassembly structure is applied to a fixed object (1) with a concave part (11) arranged above a fixing hole (12), and comprises a bolt (22), wherein the bolt (22) comprises a screw rod part (221) and a head part (222) connected with the screw rod part (221), and threads are arranged on the screw rod part (221);

The method is characterized in that: and also comprises

-A first magnetic member (21), the first magnetic member (21) being a circular cylinder, the first magnetic member (21) being receivable within the recess (11), the first magnetic member (21) being centrally provided with a through hole (213) for the screw portion (221) to pass through;

-a magnetic metal sheet (23), said magnetic metal sheet (23) being a sheet-like metal disc, the outer diameter of which is adapted to the diameter of the recess (11) of the object (1) to be fixed.

2. The anti-disassembly structure of the locking bolt according to claim 1, wherein a conical surface (223) is formed at the joint of the screw part (221) and the head part (222), the top surface (212) of the first magnetic piece (21) is provided with a concave surface (214), and the concave surface (214) is matched with the conical surface (223).

3. The lock bolt detachment prevention structure according to any one of claims 1 to 2, characterized in that the first magnetic member (21) and the magnetic metal sheet (23) are of a hard magnetic material.

4. A dismounting tool for a lock bolt anti-dismounting structure as claimed in any one of claims 1 to 3, characterized by comprising a handle (31), a connecting rod (32) connected with the handle (31), a connector (33) connecting an end of the connecting rod (32), and a second magnetic member (34) connected with the connector (33).

5. The dismounting tool as claimed in claim 4, characterized in that the magnetic attraction of the second magnetic element (34) to the magnetic metal sheet (23) is greater than the magnetic attraction of the first magnetic element (21) to the magnetic metal sheet (23).