Detachable lock bolt assembly

Abstract

A detachable anti-loose bolt assembly comprises a bolt provided with a notch, and the depth of the notch is smaller than the sum of the thickness of two connecting plates and the thickness of a fastening nut. The fastening nuts are arranged on the bolts in a sleeving mode and located on the two connecting plates; the locknut is arranged on the bolt in a sleeving mode and located above the fastening nut; the locknut is a hexahedron, and the six surfaces of the locknut are respectively provided with a radial through hole to form three radial through mounting channels; and the cotter pin selectively penetrates through any one of the three mounting channels of the locknut, and the tail part of the cotter pin is separated towards the two sides, so that the bolt and the locknut are locked. The fastening bolt can be effectively prevented from loosening, the connection loosening prevention effect is good, and the fastening bolt can be widely applied to connection of equipment with large vibration.

Description

Technical Field

[0001] This utility model relates to the field of bolt connection technology, specifically to a detachable anti-loosening bolt assembly. Background Technology

[0002] When bolts and nuts are connected, a double-nut structure is often used for fastening in situations with minimal vibration; this is also known as a counter-nut anti-loosening mechanism. Once the two counter-nuts are tightened, there is always an interaction pressure between them. For either nut to rotate, it must overcome the friction between the engaged threads. Even if the external load changes, if the upper nut does not loosen, the pressure between the counter-nuts remains constant, thus preventing loosening.

[0003] In existing double-nut anti-loosening technology, under conditions of significant vibration, the anti-loosening nut usually loosens first, followed by the main fastening nut, ultimately leading to connection failure. Summary of the Invention

[0004] The purpose of this invention is to design a detachable anti-loosening bolt assembly that effectively prevents the fastening bolts from loosening, has a good anti-loosening effect, and can be widely used in the connection of equipment with large vibrations.

[0005] To achieve the above objectives, the technical solution of this utility model is as follows:

[0006] A detachable anti-loosening bolt assembly, comprising,

[0007] Bolts with slots on them, the depth of which is less than the thickness of the two connecting plates plus the thickness of the fastening nut.

[0008] The fastening nut is fitted onto the bolt and located on the two connecting plates;

[0009] The lock nut is fitted onto the bolt and positioned above the fastening nut; the lock nut is a hexahedron with radially penetrating holes on each of its six faces, forming three radially penetrating installation channels.

[0010] A cotter pin can be selectively inserted into any one of the three mounting channels of the lock nut. The tail of the cotter pin is pried open to both sides to lock the bolt and the lock nut.

[0011] The detachable anti-loosening bolt assembly of this utility model is characterized by the bolt having a pre-made groove, the groove depth being less than the thickness of the connecting plate plus the thickness of the main fastening nut, and the anti-loosening nut and bolt being fixed by a cotter pin to achieve an anti-loosening structure.

[0012] After the fastening nut is tightened to the required torque, and the lock nut is tightened so that its pre-drilled through-hole aligns with the pre-drilled slot aligns with the bolt's pre-drilled slot, the cotter pin will pass through the nut's pre-drilled through-hole, locking the bolt and lock nut together. Under external force and vibration, as long as the cotter pin is not damaged, the lock nut will not loosen, ensuring that the pressure between the opposing nuts remains constant, thus preventing loosening. To remove this bolt and nut fastening structure, both nuts can be removed after removing the cotter pin.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] This utility model adopts an anti-loosening structure by using a bolt with a groove and an anti-loosening nut and bolt with a cotter pin to fix the installation channel.

[0015] This utility model has a simple structure, effectively prevents the fastening bolts from loosening, has a good anti-loosening effect, and has low manufacturing cost. It can be widely used for connecting equipment with large vibrations. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model;

[0017] Figure 2 This is a schematic diagram of the assembly of bolts, fastening nuts and lock nuts in an embodiment of this utility model;

[0018] Figure 3 for Figure 2 AA cross-section view;

[0019] Figure 4 for Figure 2 BB cross-section;

[0020] Figure 5 for Figure 2 Top view. Detailed Implementation

[0021] See Figures 1-5 The detachable anti-loosening bolt assembly of this utility model includes,

[0022] Bolt 1 has a slot 11, the depth of which L is less than the thickness of the two connecting plates 100 plus the thickness of the fastening nut 2.

[0023] Fastening nut 2, fitted onto bolt 1, is located on the two connecting plates;

[0024] The anti-loosening nut 3 is fitted onto the bolt 1 and located above the fastening nut 2; the anti-loosening nut 3 is a hexahedron, and each of its six faces has a radially through hole 31, forming three radially through installation channels.

[0025] The cotter pin 4 can be selectively inserted into any one of the three mounting channels of the anti-loosening nut 3. The tail of the cotter pin 4 is pried open to both sides to lock the bolt 1 and the anti-loosening nut 3.

[0026] When using, tighten the locking nut and bolt on the equipment or facility until the pre-tightening requirement is met. Then, screw the locking nut into the bolt until any one of the three through holes pre-drilled in the locking nut for a cotter pin aligns with the pre-drilled slot in the bolt. The cotter pin will then smoothly pass through the through hole in the locking nut and the pre-drilled slot in the bolt. Finally, pry open the end of the cotter pin to lock the bolt and locking nut together.

[0027] After the cotter pin is inserted into the through hole pre-made in the lock nut and the slot pre-made in the bolt, the end of the cotter pin is pried open to prevent it from falling off.

[0028] If removal is required, the lock nut and fastening nut can be removed after removing the cotter pin.

Claims

1. A detachable anti-loosening bolt assembly, characterized in that, include, Bolts with slots on them, the depth of which is less than the thickness of the two connecting plates plus the thickness of the fastening nut. The fastening nut is fitted onto the bolt and located on the two connecting plates; The lock nut is fitted onto the bolt and positioned above the fastening nut; the lock nut is a hexahedron with radially penetrating holes on each of its six faces, forming three radially penetrating installation channels. A cotter pin can be selectively inserted into any one of the three mounting channels of the lock nut. The tail of the cotter pin is pried open to both sides to lock the bolt and the lock nut.

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