Butterfly-shaped gasket and device and method for preventing fastener from loosening

Abstract

The invention discloses a butterfly-shaped gasket and a device and method for preventing a fastener from loosening, the butterfly-shaped gasket comprises a first annular supporting face arranged at the top of the butterfly-shaped gasket and a second annular supporting face arranged at the bottom of the butterfly-shaped gasket, and the first annular supporting face and the second annular supporting face are both parallel to the horizontal plane. The first annular supporting face and the second annular supporting face are each provided with a right triangle protrusion. The device for preventing the fastening piece from loosening comprises a to-be-fastened piece, a butterfly-shaped gasket and a nut which are sequentially connected through a bolt. Compared with the prior art, the butterfly-shaped gasket and the device and method for preventing the fastener from loosening have the advantages that the fastener can be effectively prevented from loosening, and stability and safety are improved.

Description

Technical Field

[0001] The present invention relates to a butterfly washer, a device and a method for preventing fasteners from loosening. Background Art

[0002] In the modern industrial and mechanical fields, fastener connections are a key link to ensure 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 continuous progress of technology, their deficiencies have become increasingly prominent.

[0003] The butterfly washer adopts a relatively simple structural design. Although it can provide a certain degree of anti-loosening effect to a certain extent, in the face of complex and changeable working environments and external forces such as high-intensity vibration and impact, its performance gradually becomes inadequate. For example, in the automotive industry, the continuous operation of the engine generates strong vibrations, and the butterfly washer may not be able to effectively prevent the loosening of the connection part for a long time, thus affecting the performance and safety of the vehicle. In the heavy machinery field, under the high-load operation of the equipment, the anti-loosening ability of the butterfly washer is limited, easily leading to problems in the connection of key components, increasing the maintenance cost and downtime. Summary of the Invention

[0004] In order to overcome the above-mentioned drawbacks of the prior art, the present invention proposes a butterfly washer, a device and a method for preventing fasteners from loosening, which can effectively prevent fasteners from loosening and improve stability and safety.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a butterfly washer, including a first annular support surface provided at the top of the butterfly washer and a second annular support surface provided at the bottom of the butterfly washer. Both the first annular support surface and the second annular support surface are parallel to the horizontal plane, and right-angled triangle protrusions are provided on both the first annular support surface and the second annular support surface.

[0006] The present invention also provides a device for preventing fasteners from loosening, including a fastener to be fastened, a butterfly washer and a nut sequentially connected by a bolt; a first annular support surface and a second annular support surface are respectively provided at the top and bottom of the butterfly washer, and right-angled triangle protrusions are provided on both the first annular support surface and the second annular support surface; right-angled triangle protrusions are provided on the contact surface between the nut and the first annular support surface of the butterfly washer, and right-angled triangle protrusions are provided on the contact surface between the fastener to be fastened and the second annular support surface of the butterfly washer.

[0007] The present invention also provides a method for preventing fasteners from loosening, including the following steps:

[0008] Step 1: Use bolts to sequentially connect the fastener to be fastened, the bevel washer, and the nut, and make the side of the fastener to be fastened with a right-angled triangular protrusion contact the second annular support surface of the bevel washer, and the first annular support surface of the bevel washer contact the side of the nut with a right-angled triangular protrusion;

[0009] Step 2: Tighten the nut so that the inclined surfaces corresponding to the hypotenuses of the right-angled triangular protrusions on the annular support surface of the bevel washer respectively contact the inclined surfaces corresponding to the hypotenuses of the right-angled triangular protrusions provided on the nut and the fastener to be fastened, and ensure that the bevel washer rotates smoothly and passes through the inclined surface of the right-angled triangular protrusion smoothly;

[0010] Step 3: After the nut is fastened, the annular support surface of the bevel washer contacts the planes of the nut and the fastener to be fastened respectively; when the fastener has a tendency to loosen, the vertical surfaces corresponding to the right-angled sides of the right-angled triangular protrusions on the annular support surface of the bevel washer respectively contact the vertical surfaces corresponding to the right-angled sides of the right-angled triangular protrusions of the nut and the fastener to be fastened, generating resistance to prevent the fastener from loosening.

[0011] Compared with the prior art, the positive effects of the present invention are:

[0012] A bevel washer, a device and a method for preventing fasteners from loosening provided by the present invention have the advantages of effectively preventing fasteners from loosening and improving stability and safety. Brief Description of the Drawings

[0013] The present invention will be described by way of examples with reference to the accompanying drawings, wherein:

[0014] Figure 1 is a schematic structural diagram after the fastener is fastened;

[0015] Figure 2 is a schematic top view of the bevel washer;

[0016] Figure 3 is a schematic bottom view of the bevel washer;

[0017] Figure 4 is a schematic structural diagram of the nut;

[0018] Figure 5 is a schematic structural diagram of the fastener to be fastened;

[0019] Figure 6 is a schematic diagram of the hypotenuse contact when the right-angled triangular protrusion rotates clockwise and is tightened;

[0020] Figure 7 is a schematic diagram of the right-angled side contact when the right-angled triangular protrusion resists the loosening tendency;

[0021] The reference numerals in the figure include: 1, bolt; 2, fastener to be fastened; 3, bevel washer; 4, nut; 5, first annular support surface; 6, right triangle protrusion; 7, second annular support surface; 8, right triangle protrusion; 9, right triangle protrusion; 10, right triangle protrusion (note: the right triangle protrusions are provided on different components and are represented by different numbers); 11, hypotenuse; 12, right side. Detailed implementation mode

[0022] As Figure 1 shown, the device for preventing loosening of fasteners of the present invention includes: bolt 1, fastener to be fastened 2, bevel washer 3, nut 4, wherein:

[0023] The structure of the bevel washer 3 is as Figure 2 and Figure 3 shown. A first annular support surface 5 is provided at the top of the bevel washer 3. The first annular support surface 5 is parallel to the horizontal plane, and a right triangle protrusion 6 is provided on the first annular support surface 5; a second annular support surface 7 is provided at the bottom of the bevel washer 3. The second annular support surface 7 is parallel to the horizontal plane, and a right triangle protrusion 8 is provided on the second annular support surface 7.

[0024] The structure of the nut 4 is as Figure 4 shown. A right triangle protrusion 9 is provided on the contact surface between the nut and the first annular support surface 5 of the bevel washer 3.

[0025] The structure of the fastener to be fastened 2 is as Figure 5 shown. A right triangle protrusion 10 is provided on the contact surface between the fastener to be fastened 2 and the second annular support surface 7 of the bevel washer 3.

[0026] When the nut 4 is tightened, the inclined surfaces corresponding to the hypotenuses 11 of the right triangle protrusions on the annular support surface of the bevel washer 3 are respectively in contact with the inclined surfaces corresponding to the hypotenuses of the right triangle protrusions provided on the nut 4 and the fastener to be fastened 2, and can smoothly pass through the inclined surfaces of the right triangle protrusions, as Figure 6 shown. After the nut 4 is fastened, the annular support surfaces of the bevel washer 3 are respectively in contact with the planes of the nut 4 and the fastener to be fastened 2. When the fastener has a tendency to loosen, the vertical surfaces corresponding to the right sides 12 of the right triangle protrusions on the annular support surface of the bevel washer 3 are respectively in contact with the vertical surfaces corresponding to the right sides of the right triangle protrusions of the nut 4 and the fastener to be fastened 2, generating resistance to hinder the loosening of the fastener, as Figure 7 shown.

[0027] As a preferred mode of the present invention, the nut 4 and the bolt 1 have matching threads, which can enable the fastener to achieve a fastening effect.

[0028] As a preferred embodiment of the present invention, the first and second annular support surfaces provided on the disc spring washer can increase the contact area between the disc spring washer, the nut, and the fastener to be fastened after the fastener is tightened, thereby enhancing stability.

[0029] As a preferred embodiment of the present invention, right-angled triangular protrusions are provided on the planes of the disc spring washer, the nut, and the fastener to be fastened. The right-angled triangular protrusions enable the nut and the disc spring washer to rotate smoothly during tightening and prevent rotation when there is a tendency of loosening after fastening, thus preventing loosening.

[0030] As a preferred embodiment of the present invention, the inclined plane corresponding to the hypotenuse of the right-angled triangular protrusion is the contact surface for the rotation of the nut and the disc spring washer, and the vertical plane corresponding to the right-angled side of the right-angled triangular protrusion is the contact surface for preventing loosening.

[0031] As a preferred embodiment of the present invention, the right-angled triangular protrusions are evenly distributed, which can evenly distribute the acting force for preventing loosening and extend the service life.

[0032] As a preferred embodiment of the present invention, the material of the disc spring washer should have good elasticity, which is beneficial for the disc spring washer to undergo elastic deformation when it is necessary to loosen the nut, so that the vertical plane corresponding to the right-angled side of the right-angled triangular protrusion is separated, and the nut can be loosened smoothly.

Claims

1. A butterfly washer, characterized in that: It includes a first annular support surface arranged at the top of the butterfly washer and a second annular support surface arranged at the bottom of the butterfly washer, the first annular support surface and the second annular support surface are parallel to the horizontal plane, and right-angled triangular protrusions are arranged on the first annular support surface and the second annular support surface.

2. A butterfly washer according to claim 1, characterized in that: The surface corresponding to the short straight side of the right-angled triangle protrusion is a vertical surface, and the surface corresponding to the long straight side is parallel to the horizontal surface.

3. The butterfly washer according to claim 1, characterized in that: The first annular supporting surface is disposed close to the inner ring.

4. The butterfly washer according to claim 1, characterized in that: The second annular supporting surface is disposed close to the outer ring.

5. A device for preventing a fastener from loosening, characterized in that: It includes a fastener, a butterfly washer and a nut which are connected in sequence by bolts; a first annular support surface and a second annular support surface are respectively arranged on the top and the bottom of the butterfly washer, and right-angled triangular protrusions are arranged on the first annular support surface and the second annular support surface; a right-angled triangular protrusion is arranged on the contact surface between the nut and the first annular support surface of the butterfly washer, and a right-angled triangular protrusion is arranged on the contact surface between the fastener and the second annular support surface of the butterfly washer.

6. A device for preventing a fastener from loosening according to claim 5, characterized in that: The surface corresponding to the short straight side of the right-angled triangle protrusion is a vertical surface, and the surface corresponding to the long straight side is parallel to the horizontal surface.

7. A device for preventing a fastener from loosening according to claim 5, characterized in that: The first annular supporting surface is disposed close to the inner ring.

8. The device for preventing a fastener from loosening according to claim 5, characterized in that: The second annular supporting surface is disposed close to the outer ring.

9. The device for preventing a fastener from loosening according to claim 5, characterized in that: The right-angled triangular protrusions are evenly distributed.

10. A method for preventing a fastener from loosening, characterized in that: The steps include: Step 1: Use bolts to sequentially connect the fastener, the butterfly washer and the nut, and make the side of the fastener provided with the right-angled triangle protrusion contact with the second annular support surface of the butterfly washer, and the first annular support surface of the butterfly washer contact with the side of the nut provided with the right-angled triangle protrusion; Step 2: Tighten the nut so that the inclined surface corresponding to the hypotenuse of the right-angled triangle protrusion on the annular support surface of the butterfly washer contacts the inclined surfaces corresponding to the hypotenuse of the right-angled triangle protrusion set on the nut and the fastener, respectively, and ensure that the butterfly washer rotates smoothly and passes through the inclined surface of the right-angled triangle protrusion smoothly; Step three, after the nut is tightened, the annular supporting surface of the butterfly washer contacts the planes of the nut and the fastener respectively; when the fastener tends to loosen, the vertical surfaces corresponding to the right-angled sides of the right-angled triangle protrusion on the annular supporting surface of the butterfly washer contact the vertical surfaces corresponding to the right-angled sides of the right-angled triangle protrusion on the nut and the fastener respectively, generating resistance and preventing the fastener from loosening.

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