High-strength bolt

Abstract

The high-strength bolt structurally comprises a bolt body, the bolt body is hollow and provided with a containing cavity, a plurality of sets of movable grooves are formed in the peripheral face of the bolt body in a pairwise corresponding mode, all the movable grooves are communicated with the containing cavity, and movable blocks are arranged in the movable grooves. When the bolt body is tightened, the movable blocks extend out of the movable grooves and are pressed against the inner circumferential surface of the nut; after the bolt body is fastened, all the movable blocks are controlled to synchronously stretch out of the movable grooves, at the moment, a set of movable blocks located inside are tightly pressed on the inner wall of a preset fastening hole of equipment, a set of movable blocks located outside are tightly pressed on the inner circumferential face of the nut, and all the movable blocks apply pressure to the inner circumferential face of the fastening hole and the inner circumferential face of the nut respectively. And the anti-loosening effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, and more particularly to a high-strength bolt. Background Art

[0002] A bolt is a mechanical part, a cylindrical threaded fastener that is matched with a nut. It is a type of fastener consisting of a head, a screw and a cylinder with external threads. It needs to be matched with a nut to fasten two parts with through holes. This type of connection is called a bolt connection.

[0003] After the existing bolts are tightened on the components, they are very easy to loosen due to the movement of the components. Especially in high-speed vehicles and continuously running machinery and equipment, different degrees of vibration will be generated during long-term machine operation. The vibration makes the bolts very easy to loosen or even fall off. If the fastening bolts of the running machinery and equipment loosen and fall off, it is likely to affect the safety of personnel and cause great property losses. Utility Model Content

[0004] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a high-strength bolt to solve the above technical problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a high-strength bolt, including a bolt body, which is hollow and has a cavity formed therein, and a plurality of groups of movable grooves corresponding to each other are opened on the outer circumference of the bolt body, each movable groove is connected to the cavity and has a movable block built in. When the bolt body is tightened, each movable block extends out of the movable groove and is pressed against the inner circumference of the nut.

[0006] The utility model is further configured as follows: the inner end of the movable block is connected to a positioning block and the positioning block is provided with a track groove, a slider is slidably provided in the cavity, and a guide column is provided at the front end surface of the slider corresponding to each track groove.

[0007] The utility model is further configured as follows: an accommodating recess is provided on the top of the bolt body, and a thread groove communicating with the accommodating cavity is provided on the bottom of the accommodating recess, and a fastening screw is threadedly connected in the thread groove.

[0008] The utility model is further configured as follows: a plurality of butterfly springs are correspondingly arranged between the bottom wall of the cavity and the lower end surface of the slider.

[0009] The utility model is further configured that: the movable block is made of elastic rubber material.

[0010] The utility model is further configured as follows: a plurality of glue injection holes are opened on the outer end surface of the movable block, and each glue injection hole is a closed end arrangement.

[0011] The utility model is further configured as follows: an assembly surface is formed between the head of the bolt body and the rod portion, and ratchet teeth are distributed on the assembly surface.

[0012] To sum up, the utility model has the following beneficial effects: after the tightening of the bolt body is completed, each movable block is controlled to extend out of the movable groove synchronously. At this time, a group of movable blocks located inside are pressed against the inner wall of the preset fastening hole of the equipment, and a group of movable blocks located outside are pressed against the inner circumference of the nut. Pressure is applied to the inner circumference of the fastening hole and the inner circumference of the nut by each movable block, thereby achieving an anti-loosening effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic cross-sectional view of the overall structure of the utility model;

[0016] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A in the middle.

[0017] Figure numerals: 1. Bolt body; 2. Receiving cavity; 20. Movable groove; 21. Movable block; 22. Positioning block; 23. Track groove; 24. Slider; 25. Guide column; 26. Glue injection hole; 3. Receiving recess; 30. Threaded groove; 31. Fastening screw; 32. Butterfly spring; 4. Assembly surface; 40. Ratchet. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-3As shown, a high-strength bolt of an embodiment of the present invention includes a bolt body 1, which is hollow and has a cavity 2 formed therein. A plurality of groups of movable grooves 20 are correspondingly opened on the outer circumference of the bolt body 1, each movable groove 20 is connected to the cavity 2 and has a movable block 21 built therein. When the bolt body 1 is tightened, each movable block 21 extends out of the movable groove 20 and is pressed against the inner circumference of the nut.

[0020] When in use, the rod of the bolt body 1 is passed through the preset fastening hole of the device to be fastened, and then the nut matching the bolt body 1 is tightened with the bolt body 1 to complete the fastening of the bolt body 1, and then the anti-loosening operation of the bolt body 1 is performed. Specifically, each movable block 21 is controlled to synchronously extend out of the movable groove 20. At this time, a group of movable blocks 21 located inside are pressed against the inner wall of the preset fastening hole of the device, and a group of movable blocks 21 located outside are pressed against the inner circumference of the nut. Pressure is applied to the inner circumference of the fastening hole and the inner circumference of the nut by each movable block 21, thereby achieving an anti-loosening effect.

[0021] The inner end of the movable block 21 is connected to a positioning block 22 and the positioning block 22 is provided with a track groove 23. A slider 24 is slidably provided in the cavity 2, and a guide column 25 is provided on the front end surface of the slider 24 corresponding to each track groove 23; an accommodating recess 3 is provided on the top of the bolt body 1 and a threaded groove 30 is provided at the bottom of the accommodating recess 3 and is connected to the cavity 2, and a fastening screw 31 is threadedly connected to the threaded groove 30; a plurality of groups of butterfly springs 32 are provided between the bottom wall of the cavity 2 and the lower end surface of the slider 24 in pairs.

[0022] During use, after the bolt body 1 is tightened, the fastening screw 31 is screwed in. The fastening screw 31 extends into the cavity 2 through the threaded connection with the thread groove 30. The fastening screw 31 extends into the cavity 2, prompting the slider 24 to overcome the elastic reciprocating force of the butterfly spring 32 and move radially downward along the cavity 2. The movement of the slider 24 drives the movement of each guide column 25. Each guide column 25 drives each movable block 21 to extend out of the corresponding movable groove 20 through the guiding cooperation with the track groove 23, completing the anti-loosening operation of the bolt body 1.

[0023] The movable block 21 is made of elastic rubber material.

[0024] When in use, the movable block 21 is made of elastic rubber material, which can effectively improve the fastening effect between the movable block 21 and the inner peripheral surface of the fastening hole and the inner peripheral surface of the nut.

[0025] The outer end surface of the movable block 21 is provided with a plurality of glue injection holes 26 , and each glue injection hole 26 is closed.

[0026] During daily use, the roughness of the outer surface of the movable block 21 is effectively increased by opening the glue injection hole 26, thereby increasing the friction coefficient of the movable block 21;

[0027] When it is necessary to enhance the anti-loosening effect of the bolt body 1, glue is injected into each glue injection hole 26 between the assembled bolts. In the anti-loosening state, each movable block 21 extends out of the corresponding movable groove 20 and is respectively pressed against the inner circumference of the fastening hole or the inner circumference of the nut. While pressing, the movable block 21 causes the glue inside the glue injection hole 26 to be squeezed out of the glue injection hole 26 and coated onto the inner circumference of the fastening hole or the inner circumference of the nut, thereby effectively enhancing the anti-loosening effect of the bolt body 1 through the adhesive force of the glue.

[0028] The glue injection hole 26 is configured to be closed so that the glue can be more stably present in the glue injection hole 26 .

[0029] An assembly surface 4 is formed between the head and the shank of the bolt body 1 , and ratchet teeth 40 are distributed on the assembly surface 4 .

[0030] When in use, the ratchet teeth 40 increase the friction coefficient between the head of the bolt body 1 and the mounted surface, play an anti-slip role, and enhance the anti-loosening performance of the bolt body 1.

[0031] It should also be pointed out that the terms indicated in the present invention, such as "front", "rear", "vertical", "horizontal", etc., which indicate orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0032] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A high-strength bolt, comprising a bolt body (1), characterized in that: The bolt body (1) is hollow and has a cavity (2) formed therein. A plurality of movable grooves (20) are correspondingly provided on the outer circumference of the bolt body (1). Each movable groove (20) is connected to the cavity (2) and has a movable block (21) built therein. When the bolt body (1) is tightened, each movable block (21) extends out of the movable groove (20) and is pressed against the inner circumference of the nut.

2. The high-strength bolt according to claim 1, characterized in that: The inner end of the movable block (21) is connected to a positioning block (22) and the positioning block (22) is provided with a track groove (23). A slider (24) is slidably provided in the cavity (2). The front end surface of the slider (24) is provided with a guide column (25) at a position corresponding to each track groove (23).

3. The high-strength bolt according to claim 1 or 2, characterized in that: The top of the bolt body (1) is provided with a receiving recess (3), and the bottom of the receiving recess (3) is provided with a thread groove (30) communicating with the receiving cavity (2), and a fastening screw (31) is connected to the inner thread of the thread groove (30).

4. The high-strength bolt according to claim 3, characterized in that: A plurality of groups of butterfly-shaped springs (32) are arranged in pairs between the inner bottom wall of the cavity (2) and the lower end surface of the slider (24).

5. The high-strength bolt according to claim 1, characterized in that: The movable block (21) is made of elastic rubber material.

6. The high-strength bolt according to claim 5, characterized in that: The outer end surface of the movable block (21) is provided with a plurality of glue injection holes (26), and each of the glue injection holes (26) is closed.

7. The high-strength bolt according to claim 1, characterized in that: An assembly surface (4) is formed between the head of the bolt body (1) and the rod, and ratchet teeth (40) are distributed on the assembly surface (4).

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