CN203743168U

CN203743168U - Novel anti-looseness nut

Info

Publication number: CN203743168U
Application number: CN201320854154.8U
Authority: CN
Inventors: 王念伟; 董万福; 李倩; 聂志萍
Original assignee: Chengdu University
Current assignee: Chengdu University
Priority date: 2013-12-23
Filing date: 2013-12-23
Publication date: 2014-07-30
Anticipated expiration: 2023-12-23

Abstract

The utility model discloses a novel anti-looseness nut. One to three grooves are formed in one to three inner threads at the bottommost end of the non-bearing end of the nut. Each inner thread is provided with one groove. Elastic rings made of elastic materials are embedded in the grooves. The inner side face of each elastic ring is provided with three or more protrusions which are evenly distributed. The elastic rings are in interference fit with outer threads of a matched bolt. The novel anti-looseness nut is simple in structure, light in weight, convenient to assemble and disassemble, wide in application range and particularly suitable for the fields of spaceflight, aviation and the like, the looseness frequency of the nut due to vibration can be effectively decreased, and the reliability of the anti-looseness property of the nut is improved.

Description

A kind of locknut

Technical field

The utility model relates to a kind of nut, particularly relates to a kind of locknut.

Background technique:

Traditional threaded fastener is to be all generally fastenedly connected into the as a whole locking effect of playing by two or more part (or member).In scyewed joint, between worm tooth, there is certain gap, under the effect of lateral load (variable load, vibration, impact), between nuts and bolt, can produce the vibration of different frequency, the friction factor of screw pair is sharply declined, even disappear, finally cause nut revolution, loosening.Traditional anti-loose method has that friction is locking, machinery is locking, it is locking to destroy screw pair, and these traditional locking thread modes exist following deficiency: (1) makes the installing/dismounting of threaded fastener more difficult; (2) strengthened overall dimensions and the overall weight of bolt, thereby had influence on the quality of machine integral body, this is most important for precision equipments such as space flight.

Summary of the invention

The purpose of this utility model is to provide a kind of quality gently and the locknut of easy accessibility.

For achieving the above object, the solution that the utility model adopts is: a kind of locknut, there is internal thread, last 1～3 tooth internal thread place at nut non-bearing end is processed with 1～3 groove, a groove of each tooth internal thread place processing, groove is embedded in the elastic ring of being made by elastic material, the inner side surface of elastic ring is provided with 3 above equally distributed projections, elastic ring forms interference fit with the bolt outside thread matching, and described nut non-bearing end refers to one end that nut does not contact with connected piece.

Further, the tooth spacing of nut inner thread reduces to the other end gradually from the bearing end of nut.

The utility model is by embedding elastic ring at last 1～3 tooth internal thread place of nut, and make elastic ring form interference fit with the bolt outside thread matching, can between bolt, nut, produce constant frictional force, thereby can effectively reduce the nut loosening occurring because of vibrations, improve the reliability of nut anti-looseness.The utility model is simple in structure, quality is light, easy accessibility, applied widely, is particularly useful for the fields such as space flight, aviation.

Accompanying drawing explanation

Fig. 1 is that the utility model adopts the structure of an elastic ring and uses view.

Fig. 2 is the structural representation of Fig. 1 Elastic circle.

Fig. 3 is the enlarged view at I place in Fig. 1.

Fig. 4 is the structural representation that the utility model adopts two elastic rings.

In figure: 1-bolt, 2-elastic ring, 3-nut, 4-connected piece, 201-projection

Embodiment

Below in conjunction with drawings and Examples, the utility model is described in further detail.

Embodiment

As shown in Figure 1, Figure 2, Figure 3 shows, the utility model nut is processed with 1 groove at the last 1 tooth internal thread place of non-bearing end (one end not contacting with connected piece 4), the external diameter of groove is slightly larger than the external diameter of internal thread, groove is embedded in flexible circle 2, elastic ring 2 is made by the material with certain elasticity and intensity, is provided with 4 equally distributed protruding 201 on the inner side surface of elastic ring 2.The utility model nut 3 is identical with the assembly process of plain nut and bolt with the assembly process of bolt 1, after assembling, elastic ring 2 forms interference fit with the outside thread of the bolt 1 matching, projection 201 on it is pushed the frictional force that can provide larger with bolt outside thread, thereby can hinder nut loosening in the used time of doing that is subject to the power of impulsing, and because elastic ring 2 has elasticity, can also play certain cushioning effect.

In the present embodiment, the internal thread tooth spacing of nut 3 reduces to the other end gradually from the bearing end of nut 3, and the externally threaded pitch on the bolt 1 coordinating with it and tooth spacing equate, the peak clipping of load and all carrying of every circle screw thread when this structure can realize screw thread work.

When nut 3 is used in different working environments, in order to increase the locking reliability of nut 3, not affect nut whole stressed in the situation that, can consider to adopt 2 elastic ring 2(as shown in Figure 4), 3 elastic rings 2 even, the number of the projection 201 on elastic ring 2 also can suitably increase.The internal thread of the utility model nut 3 also can adopt regular screw threads, i.e. pitch and the equal screw thread of tooth spacing.

The foregoing is only one of the utility model preferred embodiment, it is pointed out that those of ordinary skills not departing under the prerequisite of the utility model use principle, can also do some modification and improvement, also should be considered as the utility model protection domain.

Claims

1. a locknut, there is internal thread, it is characterized in that: last 1～3 tooth internal thread place at nut non-bearing end is processed with 1～3 groove, a groove of each tooth internal thread place processing, groove is embedded in the elastic ring of being made by elastic material, the inner side surface of elastic ring is provided with 3 above equally distributed projections, and elastic ring forms interference fit with the bolt outside thread matching, and described nut non-bearing end refers to one end that nut does not contact with connected piece.

2. a kind of locknut according to claim 1, is characterized in that: the tooth spacing of described nut inner thread reduces to the other end gradually from the bearing end of nut.