CN202182098U - Locknut special for contact networks in railways - Google Patents

Abstract

The utility model provides a locknut special for contact networks in railways, which belongs to fasteners and is mainly used in electrification contact networks in railways. The cone-pressing enclasp type safe self-locking locknut is enclasped with a screw through cone pressing of the nut and is mainly formed by a main nut and a locknut. The front end of the external of the main nut is a hexagon, a middle section is large-diameter fine threads, and the tail end forms an outer cone body. A downward-recessed annular groove is axially arranged on the root portion of a big end of the cone body close to the position of the large-diameter fine threads, three to six longitudinal sews are axially and evenly distributed on the cone body, and the threads in the whole main nut are continuous and uniform. The whole appearance of the locknut is an external hexagon being the same size as the front end of the main nut and fine threads are arranged at the front end in the locknut and matched with the large-diameter fine threads at the middle section of the main nut. An inner cone body is arranged at the rear end of the locknut, and the cone face is matched with the outer cone body at the tail portion of the main nut. The locknut special for the contact networks in the railways is novel in design, simple in structure, low in manufacture cost and convenient to use. The anti-loosing lock force of the locknut is several times higher than various traditional anti-loosing devices so that the locknut is special for safe loose protection in electrification contact networks in railways.

Description

The special lock nut of a kind of railway contact line

Technical field

The utility model relates to fastening piece, is a kind of lock nut specifically, is specially adapted to electrification contact network.

Background technique

Screw bolt and nut is usually used in the fixing of two above connecting parts, and it occurs loosening in the environment of vibration and varying load through regular meeting.The anti-loose method of existing screw thread have the frictional force of increasing locking with mechanical locking two types, the method that increases frictional force is just like being provided with spring washer, double nut, lock washer, binding nut, nylon inserts etc., but in heavy duty, greatly reliability instability under the vibration condition; The machinery anti-loose method is just like slotted nut, cotter pin, lock washer, steel wire serial connection, concave cone locking etc., but some receives structural limitations, can not reuse.Be difficult to adapt to the requirement of this high standard of electrification contact network, complex conditions.

Summary of the invention

In order to solve the deficiency of existing technology, reach the requirement of using in the electrification contact network high standard, the utility model provides a kind of design science, rational in infrastructure, simple and practical awl to press the enclasping type self-locking nut as the special lock nut of railway contact line.Technological scheme is: the special lock nut of a kind of railway contact line, comprise mother nut and locking nut, and its mother nut outer front end is six sides; The stage casing is the major diameter fine thread; Not only enlarged locking nut and drawn the moment in time receiving, and fine thread self-locking anti-loosing effect is good, tail end becomes external cone; Cone major part root is near the circular groove of the oriented lower recess of major diameter fine thread place's radial cut; Cone axis has 3-6 bar longitudinal joint to even distribution, and the screw thread of whole mother nut inside is consistent continuously, matches with connected kingbolt; The whole appearance of locking nut is and mother nut front end outer six sides of a size, and interior forward end is carved with fine thread, matches with the big footpath fine thread of mother nut intermediate section, and the rear end is an internal cones, and its conical surface matches with the external cone of mother nut afterbody.

Cone on said mother nut and locking nut cone angle partly is 15 °～40 °.

The beneficial effect of the utility model is: simple in structure, it is comparatively convenient to install and use and dismantle; Fastening good, steady quality, safe and reliable to operation; Can arrive non-maintaining requirement, and reusable, can reduce maintenance cost, improve operational efficiency; Can protect workpiece, locking effect is arranged again.

Description of drawings

Fig. 1 is the utility model user mode figure;

Fig. 2 is the utility model mother nut left view;

Fig. 3 is the utility model mother nut master pseudosection;

Fig. 4 is the utility model locking nut master pseudosection;

Fig. 5 is the utility model locking nut left view;

Among the figure: 1 is bolt, and 2 is mother nut, and 3 is locking nut.

Embodiment

Like Fig. 1,2,3,4, shown in 5: the utility model is by mother nut 2, and locking nut 3 constitutes and bolt 1 is used.The outer front end of mother nut 2 is six sides, and the stage casing is the major diameter fine thread, has not only enlarged locking nut and has drawn the moment in time receiving; And fine thread self-locking anti-loosing effect is good; Tail end becomes external cone, and cone major part root is near the circular groove of the oriented lower recess of major diameter fine thread place's radial cut, and cone axis has 4 longitudinal joints to even distribution; The screw thread of whole mother nut 2 inside is consistent continuously, matches with connected bolt 1; Locking nut 3 whole appearances are and mother nut 2 front ends outer six sides of a size, and interior forward end is carved with fine thread, matches with the big footpath fine thread of mother nut 2 intermediate sections, and the rear end is an internal cones, and its conical surface matches with the external cone of mother nut 2 afterbodys.

Working principle is: the external cone that mother nut 2 prolongs axially is uniformly distributed with 4 narrow slits, the stage casing appearance has one section big footpath fine thread; And the front end of locking nut 3 has the internal thread, the rear end that match with it is the inner conical surface that the external cone with mother nut 2 fits; When this large-diameter thread screws when tightening up; The travel forward pulling force that produces of locking nut 3 makes cone segments that its inner conical surface forces mother nut 2 with bolt 1 locking, reaches the purpose of protection workpiece simultaneously.The axial tension acting in conjunction that produces when the big footpath of reaction force and the front fine thread of the inner conical surface of locking nut 3 being tightened because of the male cone (strobilus masculinus) of mother nut 2; Make two nuts and bolt be in relative static conditions forever; Form an integral body, so reach long-term tight purpose.

Claims (2)

1. special lock nut of railway contact line; Comprise mother nut and locking nut, it is characterized in that the mother nut outer front end is six sides, the stage casing is the major diameter fine thread; Tail end becomes external cone; Cone major part root is near the circular groove of the oriented lower recess of major diameter fine thread place's radial cut, and cone axis has 3-6 bar longitudinal joint to even distribution, and the screw thread of whole mother nut inside is consistent continuously; The whole appearance of locking nut is and mother nut front end outer six sides of a size, and interior forward end is carved with fine thread, matches with the big footpath fine thread of mother nut intermediate section, and the rear end is an internal cones, and its conical surface matches with the external cone of mother nut afterbody.

2. the special lock nut of a kind of railway contact line according to claim 1 is characterized in that the cone cone angle partly on said mother nut and the locking nut is 15 °～40 °.

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