Butterfly washer and device for preventing fastener from loosening
By setting parallel annular support surfaces at the top and bottom of the butterfly gasket and adding right-angled triangular protrusions, the problem of butterfly gasket loosening in complex environments is solved, thereby improving the stability and safety of fasteners.
Patent Information
- Application Number
- CN202520440154.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-03-13
AI Technical Summary
Existing butterfly washers are ineffective in preventing fasteners from loosening under complex and variable working environments and high-intensity vibration and impact, thus affecting equipment stability and safety.
Parallel first and second annular support surfaces are provided at the top and bottom of the butterfly washer, and right-angled triangular protrusions are provided on the support surfaces. Right-angled triangular protrusions are also provided on the contact surfaces of the nut and the butterfly washer and the contact surfaces of the fastener and the butterfly washer to increase the contact area and prevent loosening.
It effectively prevents fasteners from loosening, improves the stability and safety of fasteners, and extends their service life.
Smart Images
Figure CN223739867U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a butterfly washer and a device for preventing fasteners from loosening. Background Technology
[0002] In modern industry and machinery, fastener connections are a crucial link in ensuring the stable operation of various equipment and structures. Butterfly washers play an important role in many connection scenarios; however, with the continuous development of various industries and the ongoing advancement of technology, their shortcomings are becoming increasingly apparent.
[0003] While butterfly washers employ a relatively simple structural design and offer some degree of anti-loosening protection, their performance becomes increasingly inadequate when faced with complex and variable working environments and high-intensity vibrations and impacts. For example, in the automotive industry, the continuous operation of an engine generates strong vibrations, and butterfly washers may not be able to effectively prevent loosening of connections for extended periods, thus affecting vehicle performance and safety. In heavy machinery, under high loads, the limited anti-loosening capability of butterfly washers can easily lead to problems in the connections of critical components, increasing maintenance costs and downtime. Utility Model Content
[0004] In order to overcome the above-mentioned shortcomings of the prior art, this utility model proposes a butterfly washer and a device for preventing fasteners from loosening, which can effectively prevent fasteners from loosening and improve stability and safety.
[0005] The technical solution adopted by this utility model to solve its technical problem is: a butterfly gasket, including a first annular support surface provided at the top of the butterfly gasket and a second annular support surface provided at the bottom of the butterfly gasket. The first annular support surface and the second annular support surface are both parallel to the horizontal plane. Right-angled triangular protrusions are provided on both the first annular support surface and the second annular support surface.
[0006] This utility model also provides a device for preventing fasteners from loosening, including a fastener to be fastened, a wing washer, and a nut connected in sequence by bolts; a first annular support surface and a second annular support surface are respectively provided at the top and bottom of the wing washer, and right-angled triangular protrusions are provided on both the first annular support surface and the second annular support surface; a right-angled triangular protrusion is provided on the contact surface between the nut and the first annular support surface of the wing washer, and a right-angled triangular protrusion is provided on the contact surface between the fastener to be fastened and the second annular support surface of the wing washer.
[0007] Compared with the prior art, the positive effects of this utility model are:
[0008] This utility model provides a butterfly washer and a device for preventing fasteners from loosening. Its advantages are that it can effectively prevent fasteners from loosening and improve stability and safety. Attached Figure Description
[0009] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:
[0010] Figure 1 This is a schematic diagram of the structure after the fasteners are tightened.
[0011] Figure 2 This is a schematic diagram of the top surface structure of a butterfly-shaped washer;
[0012] Figure 3 This is a schematic diagram of the bottom structure of a butterfly-shaped washer;
[0013] Figure 4 This is a schematic diagram of the nut structure;
[0014] Figure 5 This is a schematic diagram of the structure of the fastener to be fastened;
[0015] Figure 6 A schematic diagram showing the hypotenuse contacting the right-angled triangular protrusion when it is rotated clockwise to tighten;
[0016] Figure 7 This is a schematic diagram showing the contact of the right-angled sides when a protrusion of a right triangle hinders the loosening trend.
[0017] The reference numerals in the figure include: 1. Bolt; 2. Fastener to be fastened; 3. Butterfly washer; 4. Nut; 5. First annular support surface; 6. Right-angled triangular protrusion; 7. Second annular support surface; 8. Right-angled triangular protrusion; 9. Right-angled triangular protrusion; 10. Right-angled triangular protrusion (Note: Right-angled triangular protrusions are placed on different parts and are represented by different numbers); 11. Hypotenuse; 12. Right-angled side. Detailed Implementation
[0018] like Figure 1 As shown, the device for preventing fasteners from loosening according to this utility model includes: bolt 1, fastener to be fastened 2, wing washer 3, and nut 4, wherein:
[0019] The structure of the butterfly gasket 3 is as follows: Figure 2 and Figure 3 As shown, a first annular support surface 5 is provided at the top of the butterfly washer 3. The first annular support surface 5 is parallel to the horizontal plane. A right-angled triangular protrusion 6 is provided on the first annular support surface 5. A second annular support surface 7 is provided at the bottom of the butterfly washer 3. The second annular support surface 7 is parallel to the horizontal plane. A right-angled triangular protrusion 8 is provided on the second annular support surface 7.
[0020] The structure of the nut 4 is as follows: Figure 4 As shown, a right-angled triangular protrusion 9 is provided on the contact surface between the nut and the first annular support surface 5 of the butterfly washer 3.
[0021] The structure of the fastener 2 is as follows: Figure 5 As shown, a right-angled triangular protrusion 10 is provided on the contact surface of the second annular support surface 7 between the fastener 2 and the butterfly washer 3.
[0022] When tightening nut 4, the inclined surface corresponding to the hypotenuse 11 of the right-angled triangular protrusion on the annular support surface of butterfly washer 3 contacts the inclined surface corresponding to the hypotenuse of the right-angled triangular protrusion on nut 4 and fastener 2, respectively, and can smoothly pass through the inclined surface of the right-angled triangular protrusion, such as... Figure 6 As shown. After the nut 4 is tightened, the annular support surface of the butterfly washer 3 contacts the planes of the nut 4 and the fastener 2, respectively. When the fastener tends to loosen, the vertical surfaces corresponding to the right-angled sides 12 of the right-angled triangular protrusions on the annular support surface of the butterfly washer 3 contact the vertical surfaces corresponding to the right-angled sides of the right-angled triangular protrusions of the nut 4 and the fastener 2, respectively, generating resistance and hindering the loosening of the fastener, as shown. Figure 7 As shown.
[0023] In a preferred embodiment of this utility model, the nut 4 and the bolt 1 have matching threads, which enables the fastener to achieve a tightening effect.
[0024] As a preferred embodiment of this utility model, the first and second annular support surfaces provided on the butterfly washer enable the butterfly washer to have a larger contact area with the nut and the fastener after the fastener is tightened, thereby increasing stability.
[0025] In a preferred embodiment of this utility model, the butterfly washer, nut, and the surface of the fastener to be tightened are provided with right-angled triangular protrusions. The right-angled triangular protrusions enable the nut and butterfly washer to rotate smoothly when tightened, and hinder rotation when there is a tendency to loosen after tightening, thus preventing loosening.
[0026] In a preferred embodiment of this utility model, the inclined surface corresponding to the hypotenuse of the right-angled triangle protrusion is the contact surface for the rotation of the nut and the butterfly washer, and the vertical surface corresponding to the right-angled side of the right-angled triangle protrusion is the contact surface that prevents loosening.
[0027] As a preferred embodiment of this utility model, the right-angled triangular protrusions are evenly distributed, which can make the obstructing force evenly distributed and extend the service life.
[0028] As a preferred embodiment of this utility model, the material of the butterfly washer should have good elasticity, so that when it is necessary to loosen, the butterfly washer can complete elastic deformation, so that the vertical surface corresponding to the right-angled side of the right triangle is separated, and the nut can be loosened smoothly.
Claims
1. A butterfly gasket, characterized by: The first annular supporting surface and the second annular supporting surface are arranged on the top and the bottom of the butterfly washer respectively, and the first annular supporting surface and the second annular supporting surface are parallel to the horizontal plane.
2. A butterfly washer according to claim 1, wherein: The short straight edge of the right-angled triangle protrusion corresponds to a vertical plane, and the long straight edge corresponds to a horizontal plane.
3. A butterfly washer according to claim 1, wherein: The first annular supporting surface is arranged close to the inner ring.
4. The butterfly gasket of claim 1 wherein: The second annular supporting surface is arranged close to the outer ring.
5. A device for preventing loosening of a fastener, characterized by: The first annular supporting surface and the second annular supporting surface are arranged on the top and the bottom of the butterfly washer respectively, and the first annular supporting surface and the second annular supporting surface are parallel to the horizontal plane.
6. A device for preventing the loosening of a fastener according to claim 5, wherein: The short straight edge of the right-angled triangle protrusion corresponds to a vertical plane, and the long straight edge corresponds to a horizontal plane.
7. A device for preventing the loosening of a fastener as defined in claim 5, wherein: The first annular supporting surface is arranged close to the inner ring.
8. A device for preventing the loosening of a fastener as defined in claim 5, wherein: The second annular supporting surface is arranged close to the outer ring.
9. A device for preventing the loosening of a fastener as defined in claim 5, wherein: The right-angled triangle protrusions are uniformly distributed.