CN213360798U - Self-locking bolt - Google Patents
Self-locking bolt Download PDFInfo
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- CN213360798U CN213360798U CN202021421392.6U CN202021421392U CN213360798U CN 213360798 U CN213360798 U CN 213360798U CN 202021421392 U CN202021421392 U CN 202021421392U CN 213360798 U CN213360798 U CN 213360798U
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- screw rod
- bolt
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- tooth
- locking bolt
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Abstract
The utility model discloses a self-locking bolt, including bolt head and screw rod, the bolt head is equipped with the arc protrusion towards being equipped with on the terminal surface of screw rod and prevents that the tooth is prevented to the screw rod, and the tip that the screw rod is close to the bolt head is equipped with cyclic annular locking recess, and the protrusion is prevented that the tooth is symmetric distribution along the screw rod. Prevent the tooth for traditional straight shape, the utility model provides an arc protrusion prevents that tooth, and the protrusion prevent that the screw thread on the arc direction of tooth and the shank of bolt revolves to the same, under the same condition, the utility model provides a higher moment of preventing changeing to the biggest installation moment when having improved the bolt assembly is favorable to the fastening of bolt and locking.
Description
Technical Field
The utility model belongs to the technical field of the fastener, concretely relates to self-locking bolt.
Background
The fastener is a mechanical part which is used for fastening and connecting and has wide application, and is widely used in the industries of buildings, electrical appliances, machinery, chemical engineering, metallurgy and the like. The most common fasteners are bolts, nuts, etc. which perform the fastening function by a threaded or interference fit when assembled.
The self-locking bolt is also called a press riveting bolt and is a fastener for press riveting, and when the self-locking bolt is used and installed, the self-locking bolt needs to be pressed into a material base body through stamping or other modes, so that the bolt and the material are integrally assembled. The anti-rotation convex teeth of the self-locking bolt in the prior art are of straight structures, the structures of the anti-rotation convex teeth comprise a bolt head and a bolt rod, and the traditional self-locking bolt cannot play a good anti-rotation role after being assembled, so that the maximum installation torque of the bolt during assembly is limited. In addition, the self-locking bolt with the straight anti-rotation convex tooth structure is easy to loosen after being used for a period of time, and the self-locking bolt used in some vibration environments needs regular inspection and maintenance.
Disclosure of Invention
In order to overcome among the prior art from locking bolt's straight shape prevents changeing dogtooth structure, appear not hard up technical defect after using a period easily, the utility model provides a from locking bolt prevents changeing the tooth through offering the arc protrusion on the bolt head towards the terminal surface of screw rod, and the screw thread on arc direction and the screw rod revolves to the same, can provide higher moment of preventing changeing under the same condition to the biggest installation moment when having improved the bolt assembly is favorable to the fastening and locking of bolt, has solved above-mentioned technical problem.
The utility model discloses a following technical scheme realizes above-mentioned purpose, a self-locking bolt, including bolt head and screw rod, the bolt head has been seted up the protrusion towards on the terminal surface of screw rod and has been prevented the tooth, the protrusion prevents that the arc direction of tooth is the same with the screw thread on the screw rod revolves to, and the screw rod is close to the position of bolt head and has been seted up cyclic annular locking recess.
In the self-locking bolt, the protruding anti-rotation teeth are symmetrically distributed along the screw rod.
In the self-locking bolt, the protruding anti-rotation teeth are arc-shaped.
In the self-locking bolt, the outer side end of the protruding anti-rotation tooth is provided with the chamfer.
In the self-locking bolt, the cross section of the protruding anti-rotation teeth is triangular, conical, rectangular or concave.
Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can reach following beneficial effect:
1. the utility model relates to a self-locking bolt, through setting up a plurality of arc protrusion anti-rotation teeth, and the arc direction is the same with the screw thread on the shank of bolt soon, arc protrusion anti-rotation teeth are extruded into the material when the assembly, have good anti-rotation function, for traditional straight shape anti-rotation dogtooth, can provide higher anti-rotation moment under the same condition to the maximum installation moment when having improved the bolt assembly, this fastening and locking that is favorable to the bolt;
2. the utility model discloses in the assembly process is riveted to the pressure, bolt pretension in-process screw rod receives the extrusion, and the material that flows can enter into annular locking recess in, has not only increased the anticreep function from locking bolt, but also has improved sealing performance, and assembly back impurity and steam etc. are difficult for arousing to rust in can't entering into the assembly interface, have also improved the life of this product, and the material that flows simultaneously gets into the back, still has good anti-vibration function.
Drawings
The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:
fig. 1 is a front view of a self-locking bolt of the present invention;
fig. 2 is a top view of a self-locking bolt according to the present invention;
in the figure: 1-screw rod, 2-bolt head, 3-annular locking groove and 4-protruding anti-rotation tooth.
Detailed Description
As shown in fig. 1 and 2, the self-locking bolt is a schematic diagram and a top view of the overall structure of the self-locking bolt, and includes a bolt head 2 and a screw rod 1, wherein a protruding anti-rotation tooth 4 is arranged on the end surface of the bolt head 2 facing the screw rod 1, generally 4-8 protruding anti-rotation teeth are suitable, the protruding anti-rotation teeth 4 are symmetrically distributed on the end surface of the screw rod head 2, the cross section of the protruding anti-rotation teeth 4 is triangular, conical, rectangular or concave, a chamfer is arranged at the outer side end of the protruding anti-rotation teeth 4, so that the force of pressure riveting is reduced during assembly, the protruding anti-rotation teeth 4 are arc-shaped, the arc direction is the same as the thread turning direction on the screw rod 1, and compared with the traditional straight anti-rotation teeth, higher anti-rotation torque can be provided under the same condition, thereby the maximum installation torque during bolt.
After the assembly, the protrusion rotation-preventing teeth 4 can play a good rotation-preventing role, the end part of the screw rod 1 close to the bolt head 2 is provided with the annular locking grooves 3, the number of the annular locking grooves 3 is 1-3, the annular locking grooves 3 not only can play the anti-falling and anti-vibration roles, especially under the vibration environment, the looseness of the screw rod can be effectively prevented, the flowing materials can be enabled to be subjected to the annular locking grooves 3, a certain sealing function is achieved, impurities, steam and the like are prevented from entering an assembly interface, and the rusting phenomenon is generated.
It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included within the scope of the present invention.
Claims (5)
1. The utility model provides a self-locking bolt, its characterized in that includes bolt head (2) and screw rod (1), bolt head (2) have been seted up the protrusion towards on the terminal surface of screw rod (1) and have been prevented tooth (4), the arc direction that the protrusion prevented tooth (4) is the same with the screw thread turning on screw rod (1), annular locking recess (3) have been seted up to the position that screw rod (1) is close to bolt head (2).
2. A self-locking bolt according to claim 1, characterised in that the projecting anti-rotation teeth (4) are symmetrically distributed along the shank (1).
3. A self-locking bolt according to claim 2, characterised in that the protruding anti-rotation teeth (4) are arc-shaped.
4. A self-locking bolt according to claim 3, characterised in that the outer end of the protruding anti-rotation teeth (4) is chamfered.
5. A self-locking bolt according to claim 4, characterised in that the cross-section of the protruding anti-rotation teeth (4) is triangular, conical, rectangular or concave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021421392.6U CN213360798U (en) | 2020-07-20 | 2020-07-20 | Self-locking bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021421392.6U CN213360798U (en) | 2020-07-20 | 2020-07-20 | Self-locking bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213360798U true CN213360798U (en) | 2021-06-04 |
Family
ID=76140702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021421392.6U Active CN213360798U (en) | 2020-07-20 | 2020-07-20 | Self-locking bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213360798U (en) |
-
2020
- 2020-07-20 CN CN202021421392.6U patent/CN213360798U/en active Active
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|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |