CN201582278U - Self-locking bolt - Google Patents
Self-locking bolt Download PDFInfo
- Publication number
- CN201582278U CN201582278U CN2009202812342U CN200920281234U CN201582278U CN 201582278 U CN201582278 U CN 201582278U CN 2009202812342 U CN2009202812342 U CN 2009202812342U CN 200920281234 U CN200920281234 U CN 200920281234U CN 201582278 U CN201582278 U CN 201582278U
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- Prior art keywords
- self
- bolt
- utility
- plane
- model
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- Expired - Fee Related
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Abstract
The utility model discloses a self-locking bolt, which comprises a bolt body and external screw threads arranged on the bolt body, wherein a wedge-shaped inclined surface is arranged on the root of the external screw threads, and an included angle between the wedge-shaped inclined surface and the central line of the bolt ranges from 25 degrees to 35 degrees. The self-locking bolt has the advantages of simple structure, low cost and capacity of achieving the anti-release purpose without changing a using method or increasing extra accessories.
Description
Technical field
The utility model relates to a kind of self-locking screw.
Background technique
The fastening piece that screw bolt and nut is formed is widely used in the connection of the component in the engineering goods such as lathe, automobile, agricultural machinery, and the tooth form angle is that the V thread screw of 60 degree is most common standard screw threads.Standard thread, often gets loose under the condition of violent vibration voluntarily because of its intrinsic defective, cause connect the loosening of component, light then cause the afunction of machinery equipment, weight is what for to leading to security incident.The existing loosening method of threaded fastener that solves mainly contains following several: inlay nylon or elastic collet, install retaining pin, install the retaining cushion additional, gluing etc. on screw thread.Said method ubiquity anti-loosing effect is poor, the defective of manufacturing or assembly technology complexity, user cost height and reusability difference.
The model utility content
The purpose of this utility model provides a kind of self-locking screw, to solve the above-mentioned defective that prior art exists.
To achieve these goals, the utility model provides a kind of self-locking screw of following structure, comprises bolt body and is located at outside thread on the bolt body, and its structural feature is: be provided with the wedge shape inclined-plane in externally threaded tooth bottom.
The angle of described wedge shape inclined-plane and bolt center line is 25 °～35 °.
The angle of described wedge shape inclined-plane and bolt center line is 30 °.
By above-mentioned disclosed technological scheme as can be known, when bolt and internal thread screw when using, each cusp in its screwing length of internal thread presses closer on the wedge shape inclined-plane of worm tooth bottom outside uniformly, thereby produce the normal force more much bigger than standard thread, the very big increase of normal force also nature increased frictional force between internal and external screw thread greatly, thereby can reach the purpose that prevents that connecting thread is loosening.
That advantage of the present utility model is is simple in structure, cost is low, does not change using method, does not increase additional attachments and just can reach locking purpose.
Description of drawings
Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail:
Fig. 1 is a user mode structural representation of the present utility model;
Fig. 2 is a free-body diagram of the present utility model;
Fig. 3 is the free-body diagram of common standard screw thread.
Embodiment
Shown in Figure 1 is structural representation that the utility model matches with the nut 4 with standard thread tightens together A parts 5 and B parts 6, self-locking screw provided by the utility model comprises bolt body 1, bolt body 1 is provided with outside thread 2, is provided with wedge shape inclined-plane 3 in the tooth bottom of outside thread 2.Wedge shape inclined-plane 3 is 25 °-35 ° with the angle of bolt center line, and wedge shape inclined-plane 3 serves as preferred with the angle of bolt center line with 30 °.
As shown in Figure 2, wedge shape inclined-plane 3 is 30 ° with the angle of bolt center line, supposes that the axial force that bolt is subjected to is F, so normal force Ft=2F.
As shown in Figure 3, suppose that the axial force that bolt is subjected to is all F, so normal force Fn=1.15F.
Ft that is to say that near 1.74 times of Fn the normal force that the utility model produces is 1.74 times of standard thread, thereby has reached locking purpose.
Claims (3)
1. self-locking screw comprises bolt body (1) and is located at outside thread (2) on the bolt body (1), it is characterized in that: be provided with wedge shape inclined-plane (3) in the tooth bottom of outside thread (2).
2. self-locking screw according to claim 1 is characterized in that: described wedge shape inclined-plane (3) is 25 °-35 ° with the angle of bolt center line.
3. self-locking screw according to claim 2 is characterized in that: described wedge shape inclined-plane (3) is 30 ° with the angle of bolt center line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202812342U CN201582278U (en) | 2009-11-14 | 2009-11-14 | Self-locking bolt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202812342U CN201582278U (en) | 2009-11-14 | 2009-11-14 | Self-locking bolt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201582278U true CN201582278U (en) | 2010-09-15 |
Family
ID=42724278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202812342U Expired - Fee Related CN201582278U (en) | 2009-11-14 | 2009-11-14 | Self-locking bolt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201582278U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015000318A1 (en) * | 2013-07-03 | 2015-01-08 | Xu Songlin | Anti-loosening threaded part |
| CN105201986A (en) * | 2015-10-29 | 2015-12-30 | 河南航天精工制造有限公司 | Check bolt assembly and check bolt and locknut thereof |
-
2009
- 2009-11-14 CN CN2009202812342U patent/CN201582278U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015000318A1 (en) * | 2013-07-03 | 2015-01-08 | Xu Songlin | Anti-loosening threaded part |
| CN105201986A (en) * | 2015-10-29 | 2015-12-30 | 河南航天精工制造有限公司 | Check bolt assembly and check bolt and locknut thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100915 Termination date: 20111114 |