High-strength dodecagonal head bolt

Abstract

The high-strength dodecagonal head bolt comprises a screw rod, a first bolt head is arranged at one end of the screw rod, and a second bolt head is arranged at the end, away from the screw rod, of the first bolt head. The second bolt head is of an annular structure, a plurality of first grooves are formed in the outer side of the second bolt head at equal intervals, a limiting groove is formed in the side, located on the second bolt head, of the first bolt head, and friction lines are arranged on the outer side of the first bolt head. According to the utility model, by adopting the tool matched with the first groove of the second bolt head and the tool matched with the second groove of the second bolt head, the disassembly and assembly of the dodecagonal head bolt can be realized; a dodecagonal head bolt can be disassembled and assembled by adopting a tool (a linear bolt cutter or a cross bolt cutter) matched with the limiting groove of the first bolt head; and the mode that a single tool is used for disassembly and assembly is changed, and the use convenience is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bolt technical field, concretely is a kind of high-strength twelve angle head bolt. BACKGROUND

[0002] Twelve angle head bolt is fastener that is applied very much in various fields such as automobile, aerospace, etc., and it is found by finite element stress analysis that the center of twelve angle head bolt head is not basically stressed, this part is invalid mechanism, increase the weight of product, and a part of twelve angle head bolt adopts the mode of digging weight-reducing hole in head to reduce product weight, but this mode does not make full use of the structure of head.

[0003] The existing public number CN218624972U discloses an inner and outer double twelve angle head bolt, which comprises a bolt head and a screw rod, the bolt head is fixedly connected with the screw rod, a flange face is arranged on one end of the bolt head adjacent to the screw rod, an outer twelve angle is fixedly connected with the outer part of the bolt head, a cavity is formed in one end of the bolt head away from the screw rod, an inner twelve angle is fixedly connected with the inner wall of the cavity, and a cavity is formed in the inner wall of one end of the cavity away from the screw rod, and the cavity faces the outside of the cavity; The present application solves the problem that ordinary single twelve angle head bolt is prone to slipping when the torque is large, and the inner and outer twelve angles are arranged to facilitate the installation of single twelve angle head bolt in a narrow space. At the same time, the cavity is formed in the head of the twelve angle head bolt, which reduces the invalid weight of the wrenching mechanism and reduces the weight of the finished product.

[0004] The existing technology solves the problem of slipping to some extent, but it can only be disassembled and assembled by a single tool that matches the tool. If the tool does not match, it cannot be disassembled and assembled, which is inconvenient in actual use. Therefore, we propose a high-strength twelve angle head bolt. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a high-strength twelve angle head bolt to solve the problem that the existing technology can only be disassembled and assembled by a single tool that matches the tool. If the tool does not match, it cannot be disassembled and assembled, which is inconvenient in actual use.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a high-strength twelve angle head bolt, comprising a screw rod, one end of the screw rod is provided with a first bolt head, the first bolt head is provided with a second bolt head away from one end of the screw rod; The second bolt head is a ring structure, and a plurality of first grooves are arranged at equal intervals on the outer side of the second bolt head, a limiting groove is formed on one side of the second bolt head, and a plurality of second grooves are arranged at equal intervals on the inner side of the second bolt head.

[0007] Preferably, a plurality of second grooves are arranged at equal intervals on the inner side of the second bolt head.

[0008] Preferably, the number of the first grooves is twelve, and the number of the second grooves is twelve.

[0009] Preferably, the limiting groove is a "straight groove" or a "cross groove".

[0010] Preferably, the frictional thread is a knurled thread.

[0011] Preferably, the screw rod, the first bolt head and the second bolt head are integrated, the outer diameter of the screw rod is smaller than the outer diameter of the first bolt head, and the outer diameter of the first bolt head is larger than the outer diameter of the second bolt head.

[0012] Compared with the prior art, the utility model has the beneficial effects that:

[0013] 1. By adopting the tool matched with the first grooves of the second bolt head and the tool matched with the second grooves of the second bolt head, the twelve-angle head bolt can be disassembled; by adopting the tool (straight bolt cutter or cross bolt cutter) matched with the limiting groove of the first bolt head, the twelve-angle head bolt can be disassembled; the form of disassembly by a single tool is changed, and the convenience of use is improved.

[0014] 2. When the bolt is disassembled, after the bolt is loosened, the frictional thread of the first bolt head can be manually rotated, the bolt is quickly disassembled, and the tool does not need to be continuously used. DETAILED DESCRIPTION

[0015] The accompanying drawings are used to provide a further understanding of the utility model, and constitute a part of the specification, are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model. In the drawings:

[0016] Fig. 1 It is the structural schematic diagram of the utility model;

[0017] Fig. 2 It is the top view of the utility model;

[0018] Fig. 3 It is the structural schematic diagram of the utility model removing the second bolt head.

[0019] In the drawing: 1, screw rod; 2, first bolt head; 3, second bolt head; 4, limiting groove; 5, first groove; 6, second groove. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to represent selected embodiments of this utility model.

[0021] Please see Figs. 1-3 In this embodiment of the present invention, a high-strength dodecagonal head bolt includes a screw 1, one end of which is provided with a first bolt head 2, and the other end of the first bolt head 2 away from the screw 1 is provided with a second bolt head 3; the screw 1, the first bolt head 2, and the second bolt head 3 are an integral structure, which improves the strength of the bolt; the outer diameter of the screw 1 is smaller than the outer diameter of the first bolt head 2, and the outer diameter of the first bolt head 2 is larger than the outer diameter of the second bolt head 3.

[0022] The second bolt head 3 has a ring-shaped structure, and multiple first grooves 5 are evenly spaced on the outer side of the second bolt head 3. Multiple second grooves 6 are evenly spaced on the inner side of the second bolt head 3. There are a total of twelve first grooves 5 and twelve second grooves 6. The assembly and disassembly of the twelve-corner head bolt can be achieved by using a tool that engages with the first groove of the second bolt head 3 and a tool that engages with the second groove of the second bolt head 3.

[0023] The first bolt head 2 has a limiting groove 4 on one side of the second bolt head 3. The limiting groove 4 is either a "straight groove" or a "cross groove". The twelve-head bolt can be disassembled and assembled using a tool that cooperates with the limiting groove 4 of the first bolt head 2 (straight bolt cutter or cross bolt cutter). The outer side of the first bolt head 2 is provided with friction texture. The friction texture is knurled. The twelve-head bolt can be disassembled and assembled using a tool that cooperates with the limiting groove 4 of the first bolt head 2 (straight bolt cutter or cross bolt cutter).

[0024] The working principle of this utility model is as follows: the disassembly and assembly of the twelve-corner head bolt can be achieved by using a tool that mates with the first groove of the second bolt head 3 and a tool that mates with the second groove of the second bolt head 3.

[0025] The disassembly and assembly of the twelve-head bolt can be achieved by using a tool (a flathead bolt cutter or a Phillips head bolt cutter) that mates with the limiting groove 4 of the first bolt head 2.

[0026] When disassembling bolts, once the bolts are loosened, the friction grooves on the first bolt head 2 can be manually rotated to quickly disassemble the bolts without the need for further tools.

[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-strength dodecagonal head bolt, comprising a bolt (1), characterized in that: The screw (1) is provided with a first bolt head (2) at one end, and a second bolt head (3) is provided at the end of the first bolt head (2) away from the screw (1); The second bolt head (3) has a ring structure, and multiple first grooves (5) are provided at equal intervals on the outer side of the second bolt head (3). The first bolt head (2) has a limiting groove (4) on one side of the second bolt head (3), and friction textures are provided on the outer side of the first bolt head (2).

2. The high-strength dodecagonal head bolt according to claim 1, characterized in that: The inner side of the second bolt head (3) is provided with a plurality of second grooves (6) at equal intervals.

3. A high-strength dodecagonal head bolt according to claim 2, characterized in that: There are twelve first grooves (5) and twelve second grooves (6).

4. A high-strength dodecagonal head bolt according to claim 1, characterized in that: The limiting groove (4) adopts a "straight groove" or a "cross groove".

5. A high-strength dodecagonal head bolt according to claim 1, characterized in that: The friction texture is a knurled pattern.

6. A high-strength dodecagonal head bolt according to claim 1, characterized in that: The screw (1), the first bolt head (2), and the second bolt head (3) are an integral structure. The outer diameter of the screw (1) is smaller than the outer diameter of the first bolt head (2), and the outer diameter of the first bolt head (2) is larger than the outer diameter of the second bolt head (3).

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