Combined fastener with built-in anti-skid gasket

Abstract

The combined fastener comprises a fastening bolt, the outer side of the bottom end of the fastening bolt is connected with a fastening nut through threads, the end face of the top end of the fastening nut is detachably provided with a limiting gasket, the upper surface of the limiting gasket is rotationally connected with a separation piece in a clamped mode, and the separation piece is connected with the anti-skid gasket in a clamped mode. A plurality of extrusion protrusions are fixed to the inner side of the separation piece in a circular array mode, a plurality of limiting protrusions are fixed to the upper surface of the limiting gasket, and the limiting protrusions are distributed around the circle center of the limiting gasket in an annular array mode. The built-in limiting gasket is clamped on the surface, making contact with the fastened piece, of the fastening nut, the limiting protrusions distributed in the annular array mode are arranged on the surface of the limiting gasket, and friction resistance among the limiting gasket, the fastening nut and the fastened piece is increased through the limiting protrusions with the inclined top ends. Therefore, the situation that the fastening nut rotates reversely due to vibration, and consequently a fastener is loosened is avoided.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, specifically to a combination fastener with a built-in anti-slip washer. Background Technology

[0002] Fasteners are a wide range of mechanical parts used for fastening connections. They are used in a wide range of industries, including energy, electronics, electrical appliances, machinery, chemicals, metallurgy, mold making, hydraulics, and more. Various types of fasteners can be found on all kinds of machinery, equipment, vehicles, ships, railways, bridges, buildings, structures, tools, instruments, chemicals, meters, and supplies. They are the most widely used basic mechanical components. They are characterized by a wide variety of types and specifications, different performance and uses, and a high degree of standardization, serialization, and generalization.

[0003] However, existing fasteners have low contact friction between the nut and the fastened part during use, which makes the nut prone to reverse rotation due to external vibration, resulting in loosening of the fastener. Therefore, they do not meet the current requirements. To address this, we propose a combination fastener with a built-in anti-slip washer. Utility Model Content

[0004] The purpose of this utility model is to provide a combined fastener with a built-in anti-slip washer to solve the problems mentioned in the background art, such as low contact friction between the nut and the fastened part during use, which makes the nut prone to reverse rotation due to external vibration, thus causing the fastener to loosen.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a combined fastener with a built-in anti-slip washer, including a fastening bolt, a fastening nut being threadedly connected to the outer side of the bottom end of the fastening bolt, a limiting washer being detachably installed on the top end face of the fastening nut, a separating piece being rotatably engaged on the upper surface of the limiting washer, a plurality of extrusion protrusions being fixed in a circular array on the inner side of the separating piece, a plurality of limiting protrusions being fixed on the upper surface of the limiting washer, the limiting protrusions being distributed in a ring array around the center of the limiting washer, and the top of the limiting protrusions being inclined at a 45-degree angle to one side.

[0006] Preferably, the upper surface of the fastening nut is provided with a positioning groove, and the limiting washer is engaged inside the positioning groove.

[0007] Preferably, the inner side of the positioning groove is provided with four symmetrically positioned positioning protrusions, and the inner side of the limiting pad is provided with four symmetrically positioned positioning grooves, and the positioning protrusions are engaged with the inner side of the positioning grooves.

[0008] Preferably, the extrusion protrusions and the limiting protrusions are spaced apart, and the bottom surface of the extrusion protrusions is higher than the bottom edge of the inclined side of the limiting protrusions.

[0009] Preferably, the upper surface of the limiting pad has an annular protrusion at its outer edge, and the bottom surface of the separating piece has an annular groove.

[0010] Preferably, the circle of the annular groove coincides with the circle of the annular protrusion, and the size of the annular groove is exactly the same as the size of the annular protrusion.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model has a built-in limiting washer that is snapped into the surface of the fastening nut and the fastened part. The surface of the limiting washer is provided with multiple limiting protrusions arranged in a ring array. The limiting protrusions with the top inclined increase the frictional resistance between the limiting washer, the fastening nut and the fastened part, thereby preventing the fastening nut from rotating in the opposite direction due to vibration and causing the fastener to loosen.

[0013] 2. This utility model rotates the separating plate counterclockwise, causing the extrusion protrusion to contact the limiting protrusion and bend the limiting protrusion, thereby separating the limiting protrusion from the fastener. This ensures that the reverse rotation of the fastening nut will not be hindered, making it easy to disassemble or replace the fastener. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the limiting gasket of this utility model;

[0016] Figure 3 for Figure 2 Enlarged view of the structure at point A in the middle.

[0017] In the diagram: 1. Fastening bolt; 2. Fastening nut; 3. Separating plate; 4. Limiting washer; 5. Limiting protrusion; 6. Positioning groove; 7. Positioning protrusion; 8. Extrusion protrusion; 9. Locking groove; 10. Annular protrusion. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] like Figures 1 to 3As shown, a combination fastener with a built-in anti-slip washer includes a fastening bolt 1. A fastening nut 2 is threadedly connected to the outer side of the bottom end of the fastening bolt 1. A limiting washer 4 is detachably installed on the top end face of the fastening nut 2. A separating piece 3 is rotatably engaged on the upper surface of the limiting washer 4. Multiple extrusion protrusions 8 are fixed in a circular array on the inner side of the separating piece 3. Multiple limiting protrusions 5 are fixed on the upper surface of the limiting washer 4. The limiting protrusions 5 are arranged in a circular array around the center of the limiting washer 4. The top of the limiting protrusions 5 is inclined at a 45-degree angle to one side. When the fastening nut 2 is rotated clockwise, when the separating piece 3 at the top of the fastening nut 2 is in contact with the fastened part, the limiting protrusions 5 are in contact with the surface of the fastened part and are squeezed and bent until the top of the limiting protrusions 5 is flush with the upper surface of the separating piece 3. At this time, the end of the limiting protrusions 5 is in inclined contact with the fastened part, which hinders the reverse rotation of the limiting washer 4, thereby ensuring that the fastening nut 2 will not rotate in reverse due to external vibration.

[0020] The upper surface of the fastening nut 2 is provided with a positioning groove 6, and the limiting washer 4 is engaged inside the positioning groove 6. The inner side of the positioning groove 6 is provided with four symmetrically positioned positioning protrusions 7, and the inner side of the limiting washer 4 is provided with four symmetrically positioned locking grooves 9. The positioning protrusions 7 are engaged inside the locking grooves 9. The positioning protrusions 7 are engaged inside the locking grooves 9 to restrict the state of the limiting washer 4, so that the limiting washer 4 moves synchronously with the fastening nut 2.

[0021] The extrusion protrusion 8 and the limiting protrusion 5 are distributed at intervals. The bottom surface of the extrusion protrusion 8 is higher than the bottom edge of the inclined side of the limiting protrusion 5. This ensures that when the separating piece 3 rotates counterclockwise around the axis of the limiting pad 4, the extrusion protrusion 8 can contact the limiting protrusion 5 and extrude pressure on the limiting protrusion 5, so that the limiting protrusion 5 is separated from the fastener. This ensures that the reverse rotation of the fastening nut 2 will not be hindered, making it easy to disassemble or replace the fastener.

[0022] The upper surface of the limiting pad 4 has an annular protrusion 10 at its outer edge, and the bottom surface of the separating piece 3 has an annular groove. The circle of the annular groove coincides with the circle of the annular protrusion 10, and the size of the annular groove is exactly the same as the size of the annular protrusion 10. This allows for the positioning and installation of the separating piece 3, ensuring that the separating piece 3 will not wobble or shift in position on the surface of the limiting pad 4.

[0023] Working principle: First, align the four locking grooves 9 on the inner side of the limiting gasket 4 with the four positioning protrusions 7 on the inner side of the positioning groove 6, and clamp the limiting gasket 4 into the inner side of the positioning groove 6. Then, align the annular groove at the bottom of the separating piece 3 with the annular protrusion 10 on the upper surface of the limiting gasket 4, and assemble the separating piece 3 and the limiting gasket 4. During the installation of the separating piece 3, it is necessary to ensure that the extrusion protrusion 8 and the limiting protrusion 5 are spaced apart. After the fastening nut 2, the limiting gasket 4, and the separating piece 3 are assembled, pass the fastening bolt 1 through the fastened part, and align the separating piece 3 towards the fastened part. The fastening nut 2 is brought into contact with the end of the fastening bolt 1. The fastening nut 2 is rotated clockwise, and it moves along the axis of the fastening bolt 1 and approaches the fastened part until the separating piece 3 is in contact with the fastened part. The limiting protrusion 5 slides against the surface of the fastened part and is squeezed and bent until the top of the limiting protrusion 5 is flush with the upper surface of the separating piece 3. At this time, the end of the limiting protrusion 5 is in inclined contact with the fastened part, which hinders the reverse rotation of the limiting washer 4, thereby ensuring that the fastening nut 2 will not rotate in reverse due to external vibration, and ensuring the structural stability of the fastener after use.

[0024] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A combination fastener with a built-in anti-slip washer, characterized in that: The device includes a fastening bolt (1), with a fastening nut (2) threadedly connected to the outer side of the bottom end of the fastening bolt (1). A limiting washer (4) is detachably installed on the top end face of the fastening nut (2). A separating piece (3) is rotatably engaged on the upper surface of the limiting washer (4). Multiple extrusion protrusions (8) are fixed in a circular array on the inner side of the separating piece (3). Multiple limiting protrusions (5) are fixed on the upper surface of the limiting washer (4). The limiting protrusions (5) are arranged in a ring array around the center of the limiting washer (4). The top of the limiting protrusions (5) is tilted to one side at a 45-degree angle.

2. The combined fastener with a built-in anti-slip washer according to claim 1, characterized in that: The upper surface of the fastening nut (2) is provided with a positioning groove (6), and the limiting washer (4) is snapped into the inside of the positioning groove (6).

3. A combined fastener with a built-in anti-slip washer according to claim 2, characterized in that: The inner side of the positioning groove (6) is provided with four symmetrical positioning protrusions (7), and the inner side of the limiting pad (4) is provided with four symmetrical locking grooves (9). The positioning protrusions (7) are engaged with the inner side of the locking grooves (9).

4. The combined fastener with a built-in anti-slip washer according to claim 1, characterized in that: The extrusion protrusion (8) and the limiting protrusion (5) are distributed at intervals, and the bottom surface of the extrusion protrusion (8) is higher than the bottom edge of the inclined side of the limiting protrusion (5).

5. A combined fastener with a built-in anti-slip washer according to claim 1, characterized in that: The upper surface of the limiting pad (4) is provided with an annular protrusion (10) at the outer edge, and the bottom surface of the separating piece (3) is provided with an annular groove.

6. A combined fastener with a built-in anti-slip washer according to claim 5, characterized in that: The circle of the annular groove coincides with the circle of the annular protrusion (10), and the size of the annular groove is exactly the same as the size of the annular protrusion (10).

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