CN214578259U

CN214578259U - Anti-dismantling bolt and nut assembly

Info

Publication number: CN214578259U
Application number: CN202120590273.1U
Authority: CN
Inventors: 魏波; 徐刚
Original assignee: Chengdu Wanchuang Technology Co ltd
Current assignee: Chengdu Wanchuang Technology Co ltd
Priority date: 2021-03-23
Filing date: 2021-03-23
Publication date: 2021-11-02
Anticipated expiration: 2031-03-23

Abstract

The utility model relates to a fastener technical field discloses an anti-disassembly bolt and nut subassembly, including bolt and nut, the bolt includes fixed connection's spiral shell head and screw rod, and the nut includes fixed connection's spiral shell head and nut rod, and spiral shell head and nut rod are cylindrical structure, nut rod set up with the screw of screw rod adaptation, spiral shell head and nut head all are equipped with positive multilateral prism groove. Through the additionally arranged nut rod, the nut head can be designed into a cylindrical structure and specially grooved, so that a conventional spanner is difficult to fix or disassemble a nut; and the screw head and the nut head are both provided with special regular polygonal prismatic grooves, so that the screw bolt and the nut are locked by penetrating a professional screwing tool into the regular polygonal prismatic grooves, and a common disassembling tool is difficult to fix or screw the screw bolt or the nut, so that the aim of preventing disassembly is fulfilled.

Description

Anti-dismantling bolt and nut assembly

Technical Field

The utility model relates to a fastener technical field, especially an anti-disassembly bolt and nut subassembly.

Background

In the dull and stereotyped trade, in order to prevent that non professional from dismantling the dull and stereotyped and satisfy some of dull and stereotyped anti-tear service environment demands, often can use some to prevent on the dull and stereotyped product to tear the mode open and reach required anti-tear effect open. The existing anti-disassembly mode adopts ultrasonic hot melting to weld and seal a flat plastic shell, and has high rejection rate and low reworkability; or a tamper switch is arranged, corresponding development and design are required on a hardware circuit and software, so that the performance of the product is possibly influenced while the production cost is increased.

SUMMERY OF THE UTILITY MODEL

The invention of the utility model aims to: the problem that there is high production cost or the product disability rate is high to dull and stereotyped anti-tear mode among the prior art, provides an anti-tear bolt nut assembly, prevents tearing open the protection through modes such as special nut structure, special fluting of bolt and nut to the flat board, reaches the purpose of preventing tearing open, and this mode is applicable to mass production, and the manufacturing cost who increases is not high, and is little to the influence of product disability rate.

In order to realize the purpose, the utility model discloses a technical scheme be:

the utility model provides an prevent tearing open bolt and nut subassembly, includes bolt and nut, the bolt includes fixed connection's spiral shell head and screw rod, the nut includes fixed connection's spiral shell head and nut pole, the spiral shell head with the nut pole is cylindrical structure, the nut pole seted up with the screw of screw rod adaptation, the spiral shell head with the spiral shell head all is equipped with regular polygon prism groove.

Compared with the conventional nut structure (only provided with a nut head), the utility model is additionally provided with a cylindrical nut rod, and the additionally provided nut rod realizes threaded connection through a screw hole and a screw rod, so that the utility model can further design the nut head into the cylindrical structure and perform special slotting, thereby achieving the purpose that the nut is difficult to fix or disassemble by using the conventional wrench; the bolt head and the nut head are both provided with special regular polygonal prism grooves, so that the bolt and the nut need to be locked by penetrating a professional screwing tool into the regular polygonal prism grooves, and a common disassembling tool is difficult to fix or screw the bolt or the nut, so that the aim of preventing disassembly is fulfilled.

Preferably, the length of the nut rod is 8-10 mm, and the depth of the screw hole is 6-8 mm. Within the range, the bolt and the nut are good in fastening connection stability, and good in applicability in flat plate products.

Preferably, the regular polygonal prism grooves are regular pentagonal prism grooves. The regular pentagonal prism groove is convenient to machine, and the corresponding disassembling tool of the pentagon is not common.

Preferably, a protrusion is arranged in the regular polygonal prism groove. The protruding degree of difficulty of disassembling that can increase makes general disassembling tool can't stretch into disassemble in the regular polygon prism groove.

Preferably, the bolt and the nut are both iron members or stainless steel members. Selecting either the ferrous member or the stainless steel member, both of which have sufficient strength to prevent violent disassembly, according to the use environment of the bolt and the nut.

Preferably, the screw head and the screw rod are integrally formed members, and the nut head and the nut rod are integrally formed members. The integrally formed component is not only convenient to produce, but also can ensure the overall strength of the bolt and the nut.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. compared with the conventional nut structure, the nut rod is additionally arranged on the nut, the thread length of the nut rod is longer, the fastening connection stability of the bolt and the nut can be improved, products with different thicknesses can be fastened by changing the screwing depth of the screw rod in the screw hole, and the applicability of the bolt and the nut for fastening is improved;

2. then, the nut head is designed into a cylindrical structure, so that the conventional spanner is difficult to fix or disassemble the nut, and a certain anti-disassembly effect is achieved;

3. through special design of the notches of the screw head and the nut head, a common disassembling tool is difficult to fix or screw bolts or nuts, and a good anti-disassembling effect is achieved;

4. the utility model discloses carry out special design to bolt and nut's subassembly, have fine anti-disassembly effect on dull and stereotyped using, be applicable to mass production, the manufacturing cost of increase is not high, and is small to the influence of product disability rate, has economic nature and practicality concurrently.

Drawings

FIG. 1 is a schematic structural view of the bolt and the nut according to the embodiment;

FIG. 2 is an isometric view of the bolt and nut assembly of the embodiment;

FIG. 3 is a left side view of the bolt and nut assembly of the embodiment;

FIG. 4 is a cross-sectional view A-A of FIG. 3;

FIG. 5 is a schematic structural view of a flat panel according to an embodiment;

FIG. 6 is a cross-sectional view B-B of FIG. 5;

the labels in the figure are: 1-bolt, 11-screw head, 12-screw rod, 2-nut, 21-nut head, 22-nut rod, 23-screw hole, 3-regular polygonal prism groove, 4-bulge, 5-front cover, 6-rear cover and 7-flat plate.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the following detailed description of the present invention is made with reference to the accompanying drawings and examples, and it should be understood that the specific examples described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention.

Example 1

As shown in fig. 1-4, the utility model discloses a prevent tearing open bolt and nut subassembly, including bolt 1 and nut 2, bolt 1 includes spiral shell head 11 and screw rod 12, and nut 2 includes nut head 21 and nut rod 22, and nut rod 22 sets up the screw 23 with screw rod 12 adaptation, and the side of nut head 21 is the arc surface, and spiral shell head 11 and nut head 21 all are equipped with the positive polygonal prism groove 3 different with the standard bore.

In this embodiment, the bolt 1 and the nut 2 are made of stainless steel, the length of the nut rod 22 is 9mm, the depth of the screw hole 23 is 7mm, the regular polygonal prismatic grooves 3 of the screw head 11 and the nut head 21 are regular pentagonal prismatic grooves, the centroid positions of the regular pentagonal prismatic grooves of the screw head 11 and the nut head 21 are provided with cylindrical protrusions 4, and the height of each protrusion 4 is slightly lower than the depth of the regular pentagonal prismatic groove.

When the flat plate 7 is installed in a specific application, as shown in fig. 5-6, the front cover 5 and the rear cover 6 of the flat plate 7 are assembled and aligned, the nut 2 penetrates through the screw hole of the rear cover 6, the nut 2 is fixed by the special screwing tool, the bolt 1 penetrates through the screw hole of the front cover 5, the screw 12 is aligned with the screw hole 23, and finally the bolt 1 is screwed in the screw hole 23 by another special screwing tool.

During disassembly, after the nut 2 needs to be fixed by a special screwing tool, the bolt 1 can be unscrewed and separated from the nut 2 by another special screwing tool.

Example 2

Different from embodiment 1, the iron component is all selected for use to bolt 1 and nut 2, nut pole 22 length is 10mm, the degree of depth of screw 23 is 8mm, the regular polygon prism groove 3 of spiral shell head 11 is the prism groove of regular pentagon, the regular polygon prism groove 3 of spiral shell head 21 is the prism groove of regular hexagon, the centroid position of regular pentagon prism groove is equipped with the arch 4 of round platform form, the centroid position of regular hexagon prism groove is equipped with the arch 4 of prismatic form, the height of prismatic arch 4 and round platform form arch 4 all is the same with the notch degree of depth of seting up. The special screwing tool I is matched with the groove of the nut head 21, the special screwing tool II is matched with the groove of the nut head 11, and the bolt 1 and the nut 2 need to be fixed or screwed by using the corresponding special screwing tool in specific application.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides an anti-disassembly bolt and nut subassembly, includes bolt (1) and nut (2), bolt (1) is including fixed connection's spiral shell head (11) and screw rod (12), its characterized in that, nut (2) are including fixed connection's nut head (21) and nut rod (22), nut head (21) with nut rod (22) are cylindrical structure, nut rod (22) seted up with screw (23) of screw rod (12) adaptation, spiral shell head (11) with nut head (21) all are equipped with positive polygonal prism groove (3).

2. The tamper-evident bolt and nut assembly as claimed in claim 1, wherein the nut shank (22) has a length of 8 to 10mm and the threaded bore (23) has a depth of 6 to 8 mm.

3. Tamper-evident bolt and nut assembly according to claim 1, characterized in that the regular polygonal prism groove (3) is a regular pentagonal prism groove.

4. The tamper-evident bolt and nut assembly as claimed in claim 3, wherein the regular polygonal prism groove (3) is provided with a projection (4).

5. Tamper-evident bolt and nut assembly according to any one of claims 1 to 4, characterized in that the bolt (1) and the nut (2) are both ferrous or stainless steel components.

6. Tamper-evident bolt and nut assembly according to any one of claims 1 to 4, characterized in that the head (11) and the shank (12) are formed as one piece, and the head (21) and the shank (22) are formed as one piece.