CN113958592A - Anti-loosening assembly for pin nut - Google Patents

Abstract

The invention discloses a pin nut anti-loosening assembly which comprises a screw rod and a locknut, wherein an outer inserting groove is formed in the thread surface of one end of the screw rod at intervals, inner inserting grooves are formed in the thread surface of the locknut at intervals, the inner inserting grooves and the outer inserting grooves can be in butt joint to form a limiting hole by rotating the locknut, a locking hole communicated with the outer inserting groove is formed in the outer side surface of the locknut, a clamp spring is arranged on the locknut, and the clamp spring is provided with a longitudinal inserting end extending into the limiting hole and a horizontal inserting end extending into the locking hole. The invention can always ensure that the locknut does not loosen even if the clamp spring is used under the conditions of no shearing and no other external force fracture, particularly severe vibration, has simple structure, convenient manufacture and use and strong practical reliability, and can be widely applied to threaded connection in all industries of various mechanical equipment, constructional engineering and the like.

Description

Anti-loosening assembly for pin nut

Technical Field

The invention relates to a connecting fastener, in particular to a pin nut assembly capable of preventing loosening.

Background

In many mechanical members or mechanical devices related to various industries such as industry, agriculture, and daily life, parts or components are locked by a threaded connection device formed of a screw and a nut. Screw and nut are used as fasteners with a driving system for fastening components, and therefore, a connection device formed by a nut and a screw is widely used in various industries, among which there are a screw connection fastening device for sealing between workpieces, a screw connection device for mechanism transmission, a workpiece fastening screw connection device for not requiring disassembly, and a fastening screw connection device for requiring disassembly. Compared with welding and riveting, the screw and nut connection has the characteristics of high connection strength, convenience in disassembly and the like, but the screw and nut connection still has an inevitable problem, and no matter how large the connection torque is, the nut can automatically loosen and is ineffective in connection in vibration, particularly severe vibration, so that parts or the whole machine are damaged, and even safety accidents are caused. In order to solve the problem of nut looseness, in the mechanical manufacturing and assembly, an elastic gasket is commonly used for preventing the nut from loosening, a bolt and a sinking-stopping screw are also used, an eccentric nut is used for meshing and a sawtooth nut gasket is used for matching, but for various mechanical equipment and threaded connection components of constructional engineering (such as rails, bridges, wharfs, airports, mining machinery, chemical equipment, pipelines and the like) which are located in severe environments (such as severe vibration and the like and have various external factors), and generally are not frequently disassembled, the method is adopted for preventing the nut from loosening, and only can play a limited role in a short time, but cannot be thoroughly and effectively solved for a long time.

Disclosure of Invention

Aiming at the problem that the nut is loosened in the threaded connection in the prior art, the invention provides the pin nut component which has the advantages of simple structure, convenience in processing and use, no nut loosening, reliability in connection and fastening, and is particularly suitable for being used in various mechanical equipment and building engineering in severe environments.

The technical scheme adopted by the technical problem to be solved by the invention is as follows: the utility model provides a locking subassembly that moves of pin nut, it includes screw rod and locknut, the interval is provided with outer inserting groove on the helicoid of screw rod one end, the interval is provided with inner inserting groove on the helicoid of locknut, rotates locknut and enables inner inserting groove and outer inserting groove butt joint and form spacing hole, be provided with the communicating locking hole with outer inserting groove on the locknut lateral surface, be provided with the jump ring on the locknut, the jump ring has the vertical end of inserting that stretches into spacing hole and can stretch into the horizontal end of inserting in the locking hole.

The clamp spring is integrally made of elastic metal materials (such as steel wires, chrome-plated wires and the like), the middle of the clamp spring is spiral, the longitudinal insertion end of the clamp spring is in a column rod shape, and the horizontal insertion end of the clamp spring is in an L shape.

When the anti-loosening nut is used, the screw penetrates through a workpiece which is movably laminated, the anti-loosening nut is directly rotated to mutually press the workpieces by the elastic pad (the workpieces are positioned between the screw and the elastic pad), the inner slot on the anti-loosening nut is butted with the outer connecting slot on the screw to form a limiting hole, the longitudinal inserting end of the clamp spring is inserted into the limiting hole, and the horizontal inserting end of the clamp spring is inserted into the locking hole by hands or pliers, so that the anti-loosening nut can be fixed on the screw without loosening, and the workpieces are permanently and firmly connected in a solid phase mode. The second is that the screw rod penetrates the workpiece of the movable lamination, after the elastic cushion and the working nut are additionally arranged, the workpieces are mutually compressed, the locknut is rotated, the inner slot on the locknut and the outer slot on the screw rod are butted to form a limit hole, the longitudinal insertion end of the clamp spring extends into the limit hole, and the horizontal insertion end of the clamp spring extends into the locking hole by hands or pliers, so that the locknut can be fixed on the screw rod without loosening, and the workpieces are permanently and firmly connected in a solid phase mode.

In order to ensure that the clamp spring cannot accidentally fall off from the locknut, the snap spring is provided with wire hiding grooves at six corners of the outer side surface of the locknut, pull wires made of metal are fixed on the clamp spring, and two ends of the pull wires are mutually wound and fixedly connected together after bypassing the wire hiding grooves.

The number of the outer inserting grooves on the screw is generally 1-four, the number of the inner inserting grooves on the locknut is larger than the number of the inner inserting grooves, the number of the inner inserting grooves on the locknut is four-six correspondingly, the larger the number of the inner inserting grooves on the locknut is, the better the number of the inner inserting grooves on the locknut is, and therefore the inner inserting grooves on the locknut and the outer inserting grooves on the screw can form limiting holes only by fine adjustment of the locknut.

One end (longitudinal insertion end) of a clamp spring made of a material with good elasticity, high strength and good rigidity penetrates through the locknut and extends into the limiting hole, the other end (horizontal insertion end connected with the clamp spring through the clamping rod) is inserted into a locking hole in the locknut through the action of external force, and the locknut cannot rotate on the screw rod through the action of the clamp spring, so that the locknut can be effectively prevented from loosening. The invention can always ensure that the locknut does not loosen even if the clamp spring is used under the conditions of no shearing and no other external force fracture, particularly severe vibration, has simple structure, convenient manufacture and use and strong practical reliability, and can be widely applied to threaded connection in all industries of various mechanical equipment, constructional engineering and the like.

Drawings

FIG. 1 is a partially sectional front view of the present invention with A-A,

figure 2 is a schematic top view of the present invention,

fig. 3 is a schematic view of the structure of fig. 2 in the direction of B.

In the figure, the locking device comprises a screw rod 1, a screw rod 2, a working nut 3, a thread surface 4, an outer insertion groove 5, a thread hiding groove 6, a spring washer 7, a locknut 8, a snap spring 9, a clamping rod 10, a pull wire 11, a horizontal insertion end 12, a longitudinal insertion end 13, an inner insertion groove 14 and a locking hole.

Detailed Description

In fig. 1, 2 and 3, a pin nut anti-loosening assembly comprises a screw rod 1 and a locknut 7, wherein four outer inserting grooves 4 are arranged on a thread surface 3 at one end of the screw rod at intervals, the cross sections of the outer inserting grooves are in a concave arc shape, six inner inserting grooves 13 are arranged on the thread surface of the locknut at intervals, the cross sections of the inner inserting grooves are in a concave arc shape, the locknut can be slightly rotated to enable the inner inserting grooves and the outer inserting grooves to be in butt joint to form limiting holes (not marked in the drawing), locking holes 14 communicated with the outer inserting grooves are arranged on six outer side surfaces of the locknut, a clamp spring 8 is arranged on the locknut, the clamp spring is provided with a longitudinal inserting end 12 extending into the limiting holes and a horizontal inserting end 11 extending into the locking holes, the diameter of the longitudinal inserting end is slightly smaller than the limiting hole diameter, the longitudinal inserting end generally penetrates through the locknut to enter the exposed outer connecting grooves, and the diameter of the horizontal inserting end 11 is slightly smaller than the locking hole diameter, the depth of the horizontal insertion end inserted into the locking hole is more than two thirds of the depth of the locking hole, the middle of the clamp spring is spiral, one end of the clamp spring extends out to form a longitudinal insertion end 12, the other end of the clamp spring is a straight clamping rod 9, and one end of the clamping rod is a horizontal insertion end 11. When the invention is used, the elastic pad 6 is generally arranged on the screw rod, and the working nut 2 can also be arranged on the screw rod, so that the invention can clamp and fix a workpiece by using the elastic pad, and can also clamp and fix the workpiece by using the elastic pad and the working nut 2. In the invention, the line hiding grooves 5 are arranged at six corners of the outer side surface of the locknut, the metal pull wire 10 is fixed on the clamp spring, and the two ends of the pull wire are mutually wound and fixedly connected together after bypassing the line hiding grooves.

Although the present invention has been described in detail with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (3)

1. The utility model provides a locking subassembly that moves of pin nut, it includes screw rod (1) and locknut (7), characterized by: the locking nut is characterized in that outer inserting grooves (4) are formed in a threaded surface (3) at one end of the screw at intervals, inner inserting grooves (13) are formed in a threaded surface of the locking nut at intervals, the inner inserting grooves and the outer inserting grooves can be in butt joint to form a limiting hole by rotating the locking nut, locking holes (14) communicated with the outer inserting grooves are formed in the outer side surface of the locking nut, a clamping spring (8) is arranged on the locking nut, and the clamping spring is provided with a longitudinal inserting end (12) extending into the limiting hole and a horizontal inserting end (11) extending into the locking hole.

2. The pin nut anti-loosening assembly according to claim 1, wherein: the lateral surface of the locknut is provided with a wire hiding groove (5), the clamp spring is fixed with a pull wire (10) made of metal, and the two ends of the pull wire are wound around the wire hiding groove and then fixedly connected together.

3. The pin nut anti-loosening assembly according to claim 1, wherein: the middle of the clamp spring (8) is spiral, one end of the clamp spring extends out to form a longitudinal insertion end (12), the other end of the clamp spring is a straight clamping rod (9), and one end of the clamping rod is a horizontal insertion end (11).

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