CN211852443U - Double-hexagon-head twist-off bolt - Google Patents

Abstract

The utility model discloses a two hexagonal heads twist off type bolt, including tieing head and screw rod, tieing the head and including the first hexagonal bolt end that links to each other with the screw rod, first hexagonal bolt is served and is equipped with second hexagonal bolt end, and it is concave to be equipped with the ring of twisting off between second hexagonal bolt end and the first hexagonal bolt end, and the opposite side width of first hexagonal bolt end is greater than the opposite side width of second hexagonal bolt end. The utility model discloses can satisfy the bolt assembly demand of fixed torque scope, need not to revolve wrong equipment of twisting with the help of torque force control, reduced the equipment cost, improved packaging efficiency and assembly precision, and the dismantlement operation after easily the bolt assembly. The special screw design is provided, the requirements of bolt heads in different torsion ranges are met, various twisting-off torsion specifications are provided, and the application range is wide. The twist-off torque mark is adopted, so that the selection can be identified according to application, and the assembly error is prevented. The whole design is simple, the forming is easy, the cost is low, and the method is suitable for popularization and application.

Description

Double-hexagon-head twist-off bolt

Technical Field

The utility model relates to a two hexagonal head twist-off type bolts belongs to the technical field of locking part.

Background

A bolt is a mechanical part, and a cylindrical threaded fastener matched with a nut. The fastener is composed of a head part and a screw rod (a cylinder with external threads), and is matched with the screw hole.

The bolt has the advantages that a special bolt exists in the prior art, the screwing stroke of the bolt needs to be accurately controlled, plate damage can be caused by transition screwing, the gap between a bolt head and the plate can be caused by insufficient screwing stroke, the accurate control of torsion when a knob needs to be carried out in traditional operation is very complicated, the knob equipment is very expensive in matching, and the assembling efficiency is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the not enough of above-mentioned prior art, the difficult control's of torsion problem when screwing up to traditional bolt provides a two hexagonal heads twist off type bolt.

In order to achieve the above purpose, the utility model discloses the technical scheme who adopts is:

a double-hexagon-head twist-off bolt comprises a bolt head and a screw rod, wherein the bolt head comprises a first hexagon bolt end connected with the screw rod, a second hexagon bolt end is arranged on the first hexagon bolt end, a twist-off annular groove is arranged between the second hexagon bolt end and the first hexagon bolt end,

the width of the opposite side of the first hexagonal bolt end is larger than that of the opposite side of the second hexagonal bolt end.

Preferably, the screw comprises an external thread rod section and a non-thread rod section with smooth periphery between the external thread rod section and the first hexagonal bolt end,

the maximum outer diameter of the non-threaded rod section is matched with the maximum outer diameter of the external threaded rod section.

Preferably, the free end of the screw is provided with a twist-off torque mark.

Preferably, the twist-off torque mark is a raised word dotting mark.

Preferably, the plug head is a cold heading forming plug head.

Preferably, the outer surface of the double-hexagon-head twist-off type bolt is provided with an anti-corrosion coating.

The beneficial effects of the utility model are mainly embodied in that:

1. the bolt assembling requirement of a fixed torsion range can be met, the torsion control screwing equipment is not needed, the assembling cost is reduced, the assembling efficiency and the assembling precision are improved, and the disassembling operation after the bolt assembling is easy.

2. The special screw design is provided, the requirements of bolt heads in different torsion ranges are met, various twisting-off torsion specifications are provided, and the application range is wide.

3. The twist-off torque mark is adopted, so that the selection can be identified according to application, and the assembly error is prevented.

4. The whole design is simple, the forming is easy, the cost is low, and the method is suitable for popularization and application.

Drawings

Fig. 1 is a schematic structural view of the double-hexagon-head twist-off bolt of the present invention.

Fig. 2 is a schematic view of the bottom view structure of the double-hexagon-head twist-off bolt of the present invention.

Detailed Description

The utility model provides a two hexagonal head twist-off type bolts. The technical solution of the present invention will be described in detail below with reference to the accompanying drawings so as to be easier to understand and grasp.

A double-hexagon-head twist-off bolt comprises a bolt head and a screw, wherein the bolt head comprises a first hexagon bolt end 1 connected with the screw, a second hexagon bolt end 2 is arranged on the first hexagon bolt end 1, a twist-off ring recess 3 is arranged between the second hexagon bolt end 2 and the first hexagon bolt end 1, and the width of the opposite side of the first hexagon bolt end 1 is larger than that of the opposite side of the second hexagon bolt end 2.

Specifically, when the bolt is screwed down, the second hexagonal bolt end 2 is twisted off to the twist-off ring groove 3, so that the first hexagonal bolt end 1 and the screw rod can be matched and connected in place, expensive torque monitoring equipment is not needed, and the bolt locking requirement of the torque range is easy to fix.

The second hexagonal bolt end 2 is easy to loosen and release the knob during operation, and is not required to be additionally disassembled by adopting a screw disassembling device, and it needs to be explained that in order to avoid misoperation, the width of the opposite side of the first hexagonal bolt end 1 is larger than that of the second hexagonal bolt end 2, so that misoperation in screwing is prevented.

In the scheme, the breaking torsion of the second hexagonal bolt end 2 and the first hexagonal bolt end 1 is divided into multiple required breaking torsion specifications such as 20-30 Nm, 40-50 Nm, 70-80 Nm and 85-100 Nm, and the specifications are selected according to application.

In one embodiment, the screw comprises an externally threaded shank segment 4, and a circumferentially smooth shank segment 5 located between the externally threaded shank segment 4 and the first hexagonal socket end 1, the maximum outer diameter of the shank segment 5 matching the maximum outer diameter of the externally threaded shank segment 4.

Specifically, by adopting the design, only the hole channel design with the same depth needs to be carried out in the plate, the hole channel is internally provided with the screw hole matched with the external thread rod section 4 and the smooth channel matched with the non-thread rod section 5, and the matching torque force is controlled according to the matching stroke between the screw hole and the external thread rod section 4, so that the universality of the bolt is improved, and the matching use requirements of different torque force requirements are met.

In one embodiment, as shown in fig. 2, the free end of the screw is provided with a twist-off torque indicator 6. The twist-off torque mark is a raised word dotting mark.

The torque of the bolt can be identified through the twist-off torque mark 6, and the matching requirement during assembly is met.

In one embodiment, the plug is a cold-headed shaped plug. The first hexagonal bolt end 1 and the second hexagonal bolt end 2 are designed concentrically, so that a bolt head part is formed by cold heading at first, and various machining operations are performed on the bolt head part, so that the machining operation at the forming time is easy. The bolt cost is reduced.

In one embodiment, the outer surface of the double hex head twist-off bolt is provided with an anti-corrosion coating. The anti-corrosion coating is a three-order color zinc coating, the thickness of the coating is 6-14 mu m, and the requirement of surface corrosion resistance is met.

Can discover through the above description, the utility model relates to a two hexagonal heads twist off type bolt can satisfy the bolt assembly demand of fixed torque scope, need not to revolve wrong equipment with the help of torque force control, has reduced the equipment cost, has improved packaging efficiency and assembly precision, and easily the dismantlement operation after the bolt assembly. The special screw design is provided, the requirements of bolt heads in different torsion ranges are met, various twisting-off torsion specifications are provided, and the application range is wide. The twist-off torque mark is adopted, so that the selection can be identified according to application, and the assembly error is prevented. The whole design is simple, the forming is easy, the cost is low, and the method is suitable for popularization and application.

The above technical solutions of the present invention have been fully described, and it should be noted that the present invention is not limited by the above description, and all technical solutions formed by equivalent transformation or equivalent transformation adopted by the spirit of the present invention in the aspects of structure, method or function by those of ordinary skill in the art all fall within the protection scope of the present invention.

Claims (6)

1. The utility model provides a two hexagonal head twist-off type bolts, includes bolt head and screw rod, its characterized in that:

the bolt head comprises a first hexagonal bolt end connected with the screw rod, a second hexagonal bolt end is arranged on the first hexagonal bolt end, a twisting ring concave is arranged between the second hexagonal bolt end and the first hexagonal bolt end,

the width of the opposite side of the first hexagonal bolt end is larger than that of the opposite side of the second hexagonal bolt end.

2. A double hex head twist-off bolt according to claim 1, wherein:

the screw comprises an external thread rod section and a non-thread rod section with smooth periphery, which is positioned between the external thread rod section and the first hexagonal bolt end,

the maximum outer diameter of the non-threaded rod section is matched with the maximum outer diameter of the external threaded rod section.

3. A double hex head twist-off bolt according to claim 1, wherein:

and the free end of the screw rod is provided with a twist-off torque mark.

4. A double hex head twist-off bolt according to claim 3, wherein:

the twist-off torque mark is a raised word dotting mark.

5. A double hex head twist-off bolt according to claim 1, wherein:

the bolt head is formed by cold heading.

6. A double hex head twist-off bolt according to claim 1, wherein:

and an anti-corrosion coating is arranged on the outer surface of the double-hexagon-head twist-off bolt.

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