High-strength check bolt

Abstract

The utility model discloses a high-strength anti-loosening bolt which comprises a bolt head, a bolt rod, a first rotating groove, a nut, a first threaded hole, a clamping groove, an anti-loosening structure, a rotating rod, a rotating head, a second rotating groove, a pointed part, a second threaded hole and a positioning rod. A first rotating groove is formed in the upper end face of the bolt head, a nut is in threaded connection with the outer wall of the bolt rod, first threaded holes are symmetrically formed in the two sides of the interior of the nut and are transversely formed, clamping grooves are symmetrically formed in the outer side wall of the bolt rod, and the clamping grooves communicate with the first threaded holes. The first threaded holes are internally provided with anti-loosening structures, each anti-loosening structure comprises a rotating rod, a rotating head, a second rotating groove and a pointed part, the locking strength of the nut can be improved, then the anti-loosening effect of the bolt is improved, and the bolt is not prone to falling off in the long-time using process.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to the technical field of high-strength anti-loosening bolts. Background Technique

[0002] A bolt is a mechanical part, which consists of two parts: a nut and a screw rod. It is used in cooperation with a nut to firmly connect two parts with through holes. This connection form is called bolt connection, and bolt connection belongs to detachable connection.

[0003] At present, bolts are prone to rust after long-term use. In some positions where it is not convenient to replace bolts, bolt rust prevention is particularly important. However, the current rust-proof bolts do not have good rust-proof performance or have complex structures that are not conducive to production.

[0004] To solve the problems raised in the background technique, for example, the anti-rust bolt disclosed in Application No. CN201220602953.1 includes a bolt body and a bolt head. The characteristics are as follows: a bolt head sleeve with deformation ability is sleeved on the bolt body, and there is an anti-rust oil storage cavity in the bolt head, and anti-rust oil is stored therein. The anti-rust oil can be immersed in an adsorption material, and the adsorption material is placed in the anti-rust oil storage cavity. The bottom of the anti-rust oil storage cavity is a perforated partition layer. A bolt head is installed on the bolt, and the anti-rust oil existing in the bolt head is slowly and continuously released by the deformation and extrusion of the bolt head to play an anti-rust role in protecting the bolt. This structure is simple and has good anti-rust effect, but this structure still has the following defects:

[0005] Although this structure allows the anti-rust oil existing in the bolt head to flow out through the deformation and extrusion of the bolt head, thereby playing an anti-rust role in the bolt, in some special occasions with frequent vibrations, long-term vibrations are likely to cause the bolt to become loose, resulting in poor anti-loosening effect.

[0006] To solve the problems raised in the above technology, for example, the anti-loosening bolt disclosed in Application No. CN201320330011.7 includes a main body. The upper end of the main body is provided with a bolt head, the lower end of the main body is provided with a thread, and a fastening cap is provided on the main body below the bolt head. The fastening cap is conical and extends outward from the main body, and the lower end of the fastening cap is provided with "wavy" anti-slip teeth. An inwardly concave arc-shaped groove is provided on the outer periphery of the main body between the thread and the fastening cap. Through the fastening cap with anti-slip function on the bolt, the lower end surface of which is provided with "wavy" anti-slip teeth, the friction force between the bolt head and the mating surface is enhanced, so as to better improve the fastening performance of the bolt and achieve better anti-loosening effect. However, this structure still has the following defects:

[0007] Although the lower end of the fastening cap is provided with anti-slip teeth, which enhances the friction between the bolt head and the mating surface, the bolt does not have an anti-loosening structure inside the nut, which may lead to the nut being easily loosened under long-term vibration, and then the bolt falling off, so the loosening still occurs, and the anti-loosening effect is not ideal. Summary of the Invention

[0008] The purpose of the present utility model is to solve the problems in the prior art and propose a high-strength anti-loosening bolt, which can improve the locking strength of the nut, and further improve the anti-loosening effect of the bolt, so that it is not easy to fall off during long-term use.

[0009] To achieve the above purpose, the present utility model proposes a high-strength anti-loosening bolt, including a bolt head, a bolt rod, a first rotating groove, a nut, a first threaded hole, a clamping groove, an anti-loosening structure, a rotating rod, a rotating head, a second rotating groove, a pointed part, a second threaded hole, and a positioning rod. The lower end surface of the bolt head is fixedly connected to the bolt rod. The upper end surface of the bolt head is provided with a first rotating groove. The outer wall of the bolt rod is threadedly connected to the nut. The inner sides of both sides of the nut are symmetrically provided with first threaded holes, and the first threaded holes are horizontally arranged. The outer side wall of the bolt rod is symmetrically provided with clamping grooves, and the clamping grooves communicate with the first threaded holes. Anti-loosening structures are arranged in the first threaded holes. The anti-loosening structure includes a rotating rod, a rotating head, a second rotating groove, and a pointed part. The rotating rod is threadedly arranged in the first threaded hole. One end of the rotating rod is connected to the rotating head, and a second rotating groove is opened in the rotating head. The other end of the rotating rod is connected to the pointed part, and the pointed part is used to be embedded in the clamping groove. Two second threaded holes are vertically arranged on the upper end surface and the lower end surface of the nut respectively, and a positioning rod for fixing the rotating rod is threadedly arranged in each second threaded hole.

[0010] Preferably, third threaded holes are symmetrically arranged on the upper end surface and the lower end surface of the two rotating rods, and the third threaded holes correspond to the second threaded holes respectively. The positioning rod is screwed into the second threaded hole and the third threaded hole in sequence.

[0011] Preferably, a plurality of triangular serrations are arranged on the outer wall of the pointed part, and the serrations are used to be embedded in the inside of the bolt rod.

[0012] Preferably, a reinforcing rod is vertically arranged inside the bolt rod. The top end of the reinforcing rod is connected to the inner top wall of the bolt rod, and the bottom end of the reinforcing rod is connected to the inner bottom wall of the bolt rod.

[0013] Preferably, an anti-slip gasket is installed at the connection between the bolt head and the bolt rod.

[0014] Preferably, anti-slip lines are arranged on the lower end surface of the anti-slip gasket.

[0015] Advantages of the utility model:

[0016] 1. By setting a loosening prevention structure, the utility model can improve the locking strength of the nut. After the bolt and the connecting piece are installed, the nut is screwed in and tightened. Then, a tool is inserted into the second rotating groove in the rotating head and rotated to drive the rotating rod to move in the first threaded hole. During the rotation of the rotating rod, the pointed part gradually approaches the clamping grooves on both sides of the bolt rod until the pointed part is completely embedded in the clamping grooves, thus completing the locking between the nut and the bolt rod, making it difficult for the nut to come off even when vibrating. At the same time, a number of sawteeth are arranged on the outer wall of the pointed part, so that the pointed part drives the sawteeth to be jointly embedded into the interior of the bolt rod during the process of being embedded in the clamping groove, thereby further increasing the locking force and greatly improving the loosening prevention effect, solving the problem that the nut is prone to loosen under long-term vibration, and then causing the bolt to fall off, and still resulting in loosening;

[0017] 2. By setting a positioning rod, the utility model can position the rotating rod. After the rotating rod is installed, the positioning rod is sequentially screwed into the second threaded hole and the third threaded hole by using a tool, thus completing the locking and positioning of the rotating rod. At the same time, the positioning rods are symmetrically arranged up and down, so that the same locking force can be applied to the rotating rod, making it difficult for the rotating rod to come out of the first threaded hole, thereby improving the loosening prevention effect of the bolt. Description of the drawings

[0018] Figure 1 is the front view of a high-strength loosening prevention bolt of the utility model;

[0019] Figure 2 is the sectional view of a high-strength loosening prevention bolt of the utility model;

[0020] Figure 3 is the schematic diagram of the loosening prevention structure of a high-strength loosening prevention bolt of the utility model;

[0021] Figure 4 is the sectional view of the nut of a high-strength loosening prevention bolt of the utility model;

[0022] In the figure: 1 - bolt head, 2 - bolt rod, 3 - first rotating groove, 4 - nut, 5 - first threaded hole, 6 - clamping groove, 7 - loosening prevention structure, 71 - rotating rod, 72 - rotating head, 73 - second rotating groove, 74 - pointed part, 744 - sawteeth, 8 - second threaded hole, 9 - positioning rod, 10 - third threaded hole, 11 - reinforcing rod, 12 - anti-slip gasket, 122 - anti-slip pattern. Detailed implementation manners

[0023] Refer to Figures 1 to 4, a high-strength anti-loosening bolt of the present utility model, comprising a bolt head 1, a bolt rod 2, a first rotating groove 3, a nut 4, a first threaded hole 5, a clamping groove 6, an anti-loosening structure 7, a rotating rod 71, a rotating head 72, a second rotating groove 73, a pointed part 74, a second threaded hole 8, and a positioning rod 9. The lower end surface of the bolt head 1 is fixedly connected to the bolt rod 2. The upper end surface of the bolt head 1 is provided with a first rotating groove 3. The outer wall of the bolt rod 2 is threadedly connected to the nut 4. The inner sides of both sides of the nut 4 are symmetrically provided with first threaded holes 5. The first threaded holes 5 are arranged horizontally. The outer side wall of the bolt rod 2 is symmetrically provided with clamping grooves 6. The clamping grooves 6 communicate with the first threaded holes 5. Anti-loosening structures 7 are arranged in the first threaded holes 5. The anti-loosening structures 7 include rotating rods 71, rotating heads 72, second rotating grooves 73, and pointed parts 74. The rotating rods 71 are threadedly arranged in the first threaded holes 5. One end of the rotating rod 71 is connected to the rotating head 72. A second rotating groove 73 is opened in the rotating head 72. The other end of the rotating rod 71 is connected to the pointed part 74. The pointed part 74 is used for embedding into the clamping groove 6. Two second threaded holes 8 are vertically arranged on the upper end surface and the lower end surface of the nut 4 respectively. A positioning rod 9 for fixing the rotating rod 71 is threadedly arranged in each of the second threaded holes 8.

[0024] Refer to Figure 2 and Figure 3 , a high-strength anti-loosening bolt of the present utility model. Third threaded holes 10 are symmetrically arranged up and down on the upper end surface and the lower end surface of the upper and lower ends of the two rotating rods 71. The third threaded holes 10 correspond to the second threaded holes 8 respectively. The positioning rods 9 are screwed into the second threaded holes 8 and the third threaded holes 10 in sequence. By using a tool, the positioning rods 9 are screwed into the second threaded holes 8 and the third threaded holes 10 in sequence, thereby completing the locking and positioning of the rotating rods 71. At the same time, the positioning rods 9 are symmetrically arranged up and down, and thus can apply the same locking force to the rotating rods 71, making it difficult for the rotating rods 71 to come out of the first threaded holes 5, thereby improving the anti-loosening effect of the bolt.

[0025] Refer to Figure 3 , a high-strength anti-loosening bolt of the present utility model. A plurality of sawteeth 744 with a triangular structure are arranged on the outer wall of the pointed part 74. The sawteeth 744 are used for embedding into the interior of the bolt rod 2. By arranging a plurality of sawteeth 744, when the pointed part 74 is embedded into the clamping groove 6, the sawteeth 744 are driven to jointly embed into the interior of the bolt rod 2, thereby further increasing the locking force and greatly improving the anti-loosening effect.

[0026] Refer to Figure 2, a high-strength anti-loosening bolt of the present utility model, wherein a reinforcing rod 11 is vertically arranged inside the bolt rod 2. The top end of the reinforcing rod 11 is connected to the inner top wall of the bolt rod 2, and the bottom end of the reinforcing rod 11 is connected to the inner bottom wall of the bolt rod 2. By providing the reinforcing rod 11, the overall strength of the bolt can be improved, making it less likely for the bolt to break.

[0027] Refer to Figure 2 , a high-strength anti-loosening bolt of the present utility model, wherein an anti-slip gasket 12 is installed at the connection between the bolt head 1 and the bolt rod 2. The lower end surface of the anti-slip gasket 12 is provided with anti-slip lines 122. By providing the anti-slip gasket 12 and the anti-slip lines 122, the friction between the bolt head 1 and the surface of the connecting piece can be increased, thereby improving the locking force.

[0028] Working process of the present utility model:

[0029] During the working process of a high-strength anti-loosening bolt of the present utility model, after the bolt is installed with the connecting piece, a nut 4 is screwed in and tightened. Then, a tool is inserted into the second rotating groove 73 in the rotating head 71 and rotated to drive the rotating rod 71 to move in the first threaded hole 5. During the rotation of the rotating rod 71, the pointed part 74 gradually approaches the clamping grooves 6 on both sides of the bolt rod 2 until the pointed part 74 is completely embedded in the clamping grooves 6, thereby completing the locking between the nut 4 and the bolt rod 2, making it less likely for the nut 4 to come off when vibrating. At the same time, a number of saw teeth 744 are provided on the outer wall of the pointed part 74, so that the saw teeth 744 are driven to be jointly embedded into the interior of the bolt rod 2 during the process of the pointed part 74 being embedded in the clamping grooves 6, thereby further increasing the locking force and greatly improving the anti-loosening effect. After the rotating rod 71 is installed, a positioning rod 9 is screwed into the second threaded hole 8 and the third threaded hole 10 in sequence by using a tool, thereby completing the locking and positioning of the rotating rod 71. At the same time, the positioning rods 9 are arranged symmetrically up and down, so that the same locking force can be applied to the rotating rod 71, making it less likely for the rotating rod 71 to come out of the first threaded hole 5, thereby improving the anti-loosening effect of the bolt.

[0030] The above embodiments are illustrative of the present utility model and not restrictive thereof. Any scheme obtained by simply transforming the present utility model falls within the protection scope of the present utility model.

Claims

1. A high-strength anti-loosening bolt, characterized in that: The invention comprises a bolt head (1), a bolt rod (2), a first rotation groove (3), a nut (4), a first threaded hole (5), a clamping groove (6), an anti-loosening structure (7), a rotation rod (71), a rotation head (72), a second rotation groove (73), a pointed portion (74), a second threaded hole (8), and a positioning rod (9), wherein the lower end surface of the bolt head (1) is fixedly connected to the bolt rod (2), the upper end surface of the bolt head (1) is provided with a first rotation groove (3), the outer wall of the bolt rod (2) is threadedly connected to the nut (4), the inner sides of the nut (4) are symmetrically provided with first threaded holes (5), the first threaded holes (5) are arranged in a transverse direction, the outer side wall of the bolt rod (2) is symmetrically provided with clamping grooves (6), the clamping grooves (6) and the first threaded holes (5) are symmetrically connected to the first threaded holes (5) ) are connected to each other, the first threaded hole (5) is provided with an anti-loosening structure (7), the anti-loosening structure (7) comprises a rotating rod (71), a rotating head (72), a second rotating groove (73), and a pointed portion (74), the rotating rod (71) is threadedly arranged in the first threaded hole (5), one end of the rotating rod (71) is connected to the rotating head (72), the second rotating groove (73) is provided in the rotating head (72), the other end of the rotating rod (71) is connected to the pointed portion (74), the pointed portion (74) is used to be embedded in the clamping groove (6), the upper end surface and the lower end surface of the nut (4) are each vertically provided with two second threaded holes (8), and each of the second threaded holes (8) is threadedly provided with a positioning rod (9) for fixing the rotating rod (71).

2. A high-strength anti-loosening bolt according to claim 1, characterized in that: The upper end surface and the lower end surface of the two rotating rods (71) are symmetrically provided with third threaded holes (10), and the third threaded holes (10) correspond to the second threaded holes (8). The positioning rod (9) is screwed into the second threaded hole (8) and the third threaded hole (10) in sequence.

3. A high-strength anti-loosening bolt according to claim 1, characterized in that: The outer wall of the pointed portion (74) is provided with a plurality of saw teeth (744) in a triangular structure, and the saw teeth (744) are used to be embedded in the interior of the bolt rod (2).

4. A high-strength anti-loosening bolt according to claim 1, characterized in that: A reinforcing rod (11) is vertically arranged inside the bolt rod (2), the top end of the reinforcing rod (11) is connected to the inner top wall of the bolt rod (2), and the bottom end of the reinforcing rod (11) is connected to the inner bottom wall of the bolt rod (2).

5. A high-strength anti-loosening bolt according to claim 1, characterized in that: An anti-slip gasket (12) is installed at the connection between the bolt head (1) and the bolt rod (2).

6. A high-strength anti-loosening bolt according to claim 5, characterized in that: The lower end surface of the anti-slip pad (12) is provided with anti-slip grooves (122).

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