CN218294147U - Nut non-loosening structure - Google Patents

Abstract

A nut anti-loosening structure comprises a positioning piece, a loosening-stopping nut, a clamping nut and a double-diameter bolt. The anti-loosening nut is characterized in that the clamping nut and the anti-loosening nut are locked and fixed through buckling and folding of a raised edge on the positioning piece, no axial displacement exists between the clamping nut and the anti-loosening nut through the reverse direction of the anti-loosening thread and the clamping thread, or the loosening of the nut is prevented through the reinforcement generated by the fact that the lead angle of the clamping thread is larger than that of the anti-loosening thread. The nut is manufactured by a common process without the manufacturing experience and process skill of the nut which is called as the 'nut without loosening forever'. The technical difficulty of manufacturing the nut without loosening is reduced; the cost of the nut is reduced; the nut is beneficial to the wide application of the nut which cannot be loosened; the device can reduce more faults and accidents caused by the loosening of the nut and reduce the equipment abrasion caused by the loosening of the nut.

Description

Nut non-loosening structure

Technical Field

The utility model relates to a nut structure that does not become flexible.

Background

The nuts currently known as "no-loose nuts" have the problem that they are difficult to manufacture by industry personnel.

Disclosure of Invention

It is difficult for one skilled in the art to manufacture a nut known as a "never loose nut" for the understanding that it is by no means a "never loose nut". The invention provides a nut anti-loosening structure.

The invention consists of a positioning piece, a loosening-stopping nut, a clamping nut and a double-diameter bolt. The positioning piece is made of a flat cushion, the outer edge of the flat cushion is made into an upward raised edge, a loose structure is made or manufactured at the inner hole side or the inner hole, and the positioning piece is integrally formed; the anti-loosening nut is formed by a force application surface with or without an anti-loosening structure, a hole with the diameter larger than the outer diameter of the clamping thread is formed on the force application surface side, and the hole and the internal thread are integrated on the same axis; the clamping nut is integrally formed by a stress surface with or without a loosening-stopping structure; the double-diameter bolt is integrally formed by a loosening-stopping thread, a clamping thread, a screw rod and a bolt head. The loosening-stopping thread is in a reverse direction or a forward direction, the outer diameter of the thread is smaller than the diameter of the thread tooth root of the clamping thread, and the lead angle of the thread is smaller than that of the clamping thread; the loosening stopping structure of the clamping nut and the loosening stopping nut is regular N-edge-shaped or tooth-shaped or special-shaped; the anti-loosening structure of the positioning piece corresponds to the clamping nut and the anti-loosening structure of the anti-loosening nut in a concave-convex matching assembly relation or corresponds to the concave-convex matching assembly relation with the appearance of the positioning piece, and the anti-loosening structure of the positioning piece is not provided with the anti-loosening structure of the clamping nut and the anti-loosening nut when the anti-loosening structure of the positioning piece corresponds to the clamping nut or the anti-loosening nut in a concave-convex matching assembly relation. A clamping nut without an anti-loosening structure is screwed on a clamping thread of the double-diameter bolt, a positioning piece is arranged on the anti-loosening structure of the anti-loosening nut and screwed on the anti-loosening thread of the double-diameter bolt to be fastened with the clamping nut, an upwarping edge of the positioning piece presses or beats a buckle and folds the side surface of the clamping nut, and the clamping nut and the anti-loosening nut are positioned and fixed; the clamping nut is screwed on the clamping thread of the double-diameter bolt, the positioning piece is arranged on the loosening prevention structure of the clamping nut, the loosening prevention nut is screwed on the loosening prevention thread of the double-diameter bolt and is fastened with the clamping nut, the upwarping edge of the positioning piece presses or beats the buckle and folds the side surface of the loosening prevention nut, and the clamping nut and the loosening prevention nut are positioned and fixed; the clamping nut and the loosening-stopping nut without loosening-stopping structures are respectively screwed on the clamping thread and the loosening-stopping thread of the double-diameter bolt, the positioning piece is fastened between the clamping nut and the loosening-stopping nut, the loosening-stopping structure of the positioning piece is in concave-convex fit with the clamping nut or the loosening-stopping nut in appearance, the upward raised edge of the positioning piece is pressed or knocked and buckled on the side face of the loosening-stopping nut or the clamping nut, and the clamping nut and the loosening-stopping nut are positioned and fixed.

The rotation of the clamping nut and the rotation of the loosening-stopping nut of the nut loosening-preventing structure fastening system in the vibration impact are in the same direction and in the same amplitude. When the rotation is that the clamping nut is screwed down, and the loosening-stopping thread and the clamping thread are reverse, the axial displacement between the clamping nut and the loosening-stopping nut is the axial displacement of the clamping nut plus the axial displacement of the loosening-stopping nut, and the axial displacements of the clamping nut and the loosening-stopping nut are the respective axial displacements; when the rotation is in the tightening direction of the clamping nut, and the anti-loosening threads and the clamping threads are in the forward direction, the axial displacement between the clamping nut and the anti-loosening nut is the axial displacement of the clamping nut-the axial displacement of the anti-loosening nut, and the axial displacements of the clamping nut and the anti-loosening nut are the respective axial displacements. When the rotation is in the loosening direction of the clamping nut, and the loosening stopping thread and the clamping thread are reverse, the axial displacement between the clamping nut and the loosening stopping nut is (-axial displacement of the clamping nut) + (-axial displacement of the loosening stopping nut) =0, and the axial displacement between the clamping nut and the loosening stopping nut is =0; when the rotation is in the loosening direction of the clamping nut, and the loosening stopping thread and the clamping thread are in the forward direction, the axial displacement between the clamping nut and the loosening stopping nut is the axial displacement of the loosening stopping nut-the axial displacement of the clamping nut =0, and the axial displacement of the clamping nut and the loosening stopping nut → 0. The tightening steering range of the clamping nut of the nut loosening-preventing structure fastening system in the vibration impact is limited, and the axial displacement between the clamping nut and the loosening-preventing nut is limited and small. Therefore, the axial dimension of the anti-loosening structure needs to be superposed with the axial displacement dimension between the clamping nut and the anti-loosening nut. The hole on the force application surface side of the retaining nut is provided for eliminating the accumulation of the tolerance of each component and ensuring that the positioning piece is fastened.

The invention has the characteristics that: the clamping nut and the loosening-stopping nut are positioned and fixed by buckling and folding the upward raised edge of the positioning piece, and the loosening of the nut is prevented by using the reverse direction of the loosening-stopping thread and the clamping thread to ensure that no axial displacement exists between the clamping nut and the loosening-stopping nut or by using the force increment generated by the lead angle of the clamping thread being larger than the lead angle of the loosening-stopping thread. The nut is manufactured by a common process without manufacturing experience and process skill of the nut which is called as 'the nut never loosened'.

The invention has the beneficial effects that: the technical difficulty of manufacturing the nut without loosening is reduced; the cost of the nut is reduced; the nut is beneficial to the wide application of the nut which cannot be loosened; the device can reduce more faults and accidents caused by the loosening of the nut and reduce the equipment abrasion caused by the loosening of the nut.

Drawings

FIGS. 1-6 are schematic structural views of three typical structures of a positioning member, wherein FIG. 2 is a top view of FIG. 1, FIG. 4 is a top view of FIG. 3, and FIG. 6 is a top view of FIG. 5; fig. 7-10 are two exemplary views of the nut in an unfastened configuration, wherein fig. 8 is a top view of fig. 7 and fig. 10 is a bottom view of fig. 9.

In the figure, 1-a positioning piece, 1.1-an upper raised edge, 2-a double-diameter bolt, 2.1-a loose-stopping thread, 2.2-a clamping thread, 3-a loose-stopping nut, 3.1-a hole, 4-a clamping nut, 5-a loose-stopping structure, 5.1-a regular N-edge hole, 5.2-a regular hexagonal annular boss and 5.3-a toothed hole are arranged.

Detailed Description

As shown in fig. 1 and 2, the positioning member 1 is flat-cushion-shaped, the outer side is an upturned edge 1.1, and the inner hole is a regular N-edge-shaped hole 5.1.

As shown in fig. 3 and 4, the positioning member 1 is flat-pad-shaped, the outer side is an upturned edge 1.1, and the inner hole is made into a toothed hole 5.3.

As shown in fig. 5 and 6, the positioning element 1 is flat cushion-shaped, the outer side is an upturned edge 1.1, and the outer side of the inner hole is provided with a regular hexagonal annular boss 5.2.

As shown in fig. 7 and 8, the clamping nut 4 of the non-loosening-stopping structure 5 is screwed on the clamping thread 2.2 of the double-diameter bolt 2, the positioning member 1 is mounted on the loosening-stopping structure 5 of the loosening-stopping nut 3 and screwed on the loosening-stopping thread 2.1 of the double-diameter bolt 2 to be fastened with the clamping nut 4, the end portion of the clamping thread 2.2 of the double-diameter bolt 2 is in the hole 3.1 of the loosening-stopping nut 3, and the upward raised edge 1.1 of the positioning member 1 is buckled on the side surface of the clamping nut 4 to fix the clamping nut 4 and the loosening-stopping nut 3.

As shown in fig. 9 and 10, the clamping nut 4 and the anti-loosening nut 3 without the anti-loosening structure 5 are respectively screwed on the clamping thread 2.2 and the anti-loosening thread 2.1 of the double-diameter bolt 2, the positioning member 1 is fastened between the clamping nut 4 and the anti-loosening nut 3, the end part of the clamping thread 2.2 of the double-diameter bolt 2 is arranged in the hole 3.1 of the anti-loosening nut 3, the regular hexagonal annular boss 5.2 of the positioning member 1 is in concave-convex fit with the appearance of the anti-loosening nut 3, the upwarping edge 1.1 of the positioning member 1 is buckled on the side surface of the clamping nut 4, and the clamping nut 4 and the anti-loosening nut 3 are positioned and fixed.

Claims (1)

1. A nut structure without loosening is characterized by comprising a positioning piece (1), a loosening-stopping nut (3), a clamping nut (4) and a double-diameter bolt (2); the positioning piece (1) is formed by manufacturing an upturned edge (1.1) at the outer edge of a flat cushion, manufacturing or manufacturing a stop-loosening structure (5) at the inner hole side or the inner hole and integrating the positioning piece (1); the anti-loosening nut (3) is provided with or not provided with an anti-loosening structure (5) on a force application surface, a hole (3.1) with the aperture larger than the outer diameter of the clamping thread is formed on the force application surface side, and the hole (3.1) and the internal thread are integrally formed on the same axis; the clamping nut (4) is integrally formed by a stress surface with or without a loosening-stopping structure (5); the double-diameter bolt (2) is integrally formed by a loosening-stopping thread (2.1), a clamping thread (2.2), a screw rod and a bolt head; the thread external diameter of the loosening-stopping thread (2.1) is reverse or forward and is smaller than the thread tooth root diameter of the clamping thread (2.2), and the thread lead angle is smaller than the lead angle of the clamping thread (2.2); the loosening stopping structure (5) of the clamping nut (4) and the loosening stopping nut (3) is regular N-shaped, toothed or special-shaped; the looseness stopping structure (5) of the positioning piece (1) is in a concave-convex corresponding matching assembly relation with the clamping nut (4) and the looseness stopping structure (5) of the looseness stopping nut (3) or in a concave-convex corresponding matching assembly relation with the appearance of the looseness stopping structure, and the looseness stopping structure (5) is not manufactured on the clamping nut (4) and the looseness stopping nut (3) when the looseness stopping structure (5) of the positioning piece (1) is in the concave-convex corresponding matching assembly relation with the clamping nut (4) or the looseness stopping nut (3); a clamping nut (4) without a loosening stopping structure (5) is screwed on a clamping thread (2.2) of the double-diameter bolt (2), a positioning piece (1) is arranged on the loosening stopping structure (5) of the loosening stopping nut (3) and screwed on the loosening stopping thread (2.1) of the double-diameter bolt (2) to be fastened with the clamping nut (4), an upwarping edge (1.1) of the positioning piece (1) is pressed or knocked and buckled on the side surface of the clamping nut (4), and the clamping nut (4) and the loosening stopping nut (3) are positioned and fixed; the clamping nut (4) is screwed on a clamping thread (2.2) of the double-diameter bolt (2), the positioning piece (1) is arranged on a loosening stopping structure (5) of the clamping nut (4), the loosening stopping nut (3) is screwed on the loosening stopping thread (2.1) of the double-diameter bolt (2) and is fastened with the clamping nut (4), an upward raised edge (1.1) of the positioning piece (1) is pressed or knocked and buckled on the side surface of the loosening stopping nut (3), and the clamping nut (4) and the loosening stopping nut (3) are positioned and fixed; the clamping nut (4) and the anti-loosening nut (3) without the anti-loosening structure (5) are respectively screwed on the clamping thread (2.2) and the anti-loosening thread (2.1) of the double-diameter bolt (2), the positioning piece (1) is tightly fastened between the clamping nut (4) and the anti-loosening nut (3), the anti-loosening structure (5) of the positioning piece (1) is in concave-convex fit with the appearance of the clamping nut (4) or the anti-loosening nut (3), and the upwarping edge (1.1) of the positioning piece (1) is pressed or knocked and buckled on the side face of the anti-loosening nut (3) or the clamping nut (4) to fix the clamping nut (4) and the anti-loosening nut (3) in a positioning mode.

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