CN2411376Y

CN2411376Y - Concave nut locking screw bolt

Info

Publication number: CN2411376Y
Application number: CN 00210929
Authority: CN
Inventors: 李学波
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-02-28
Filing date: 2000-02-28
Publication date: 2000-12-20
Anticipated expiration: 2010-02-28

Abstract

The utility model relates to a concave nut locking screw bolt. The concave nut locking screw bolt is used on a particular element arranged on a nut or a screw bolt when the locking of a locking nut occurs during screwing or tightening; the connection and locking of a cover which is in interaction with the nut and the screw bolt occurs after the screwing down, and the screw bolt and the nut are locked; a screw bolt rod is provided with a screw cap; the upper part of the screw cap is provided with a concave cap, and the lower interior of the concave cap presents an opening concave circular; a screw rod penetrates a spring washer, and the screw rod is in contact, locked and fixed with the concave cap and the screw bolt rod. The screw bolt is rotated and vibrated for a long time, but the screw cap is not easy to loose and drop, which avoids a lot of unsafe factors and improves the normal operation and the safety production of a mechanical device; in addition, the utility model has the advantages of simple and compact structure, low cost, etc.

Description

A kind of recessed cap lock bolt

The utility model relates to the particular components locking nut on nut or bolt locking and occurring in when tightening or tightening; Band and the interactional lid of nut are connected with bolt to lock and occur in the locking of tightening bolt afterwards or nut, particularly a kind of recessed cap lock bolt.

Be applied in fastening or fixed component at present, the Bolt Connection that coupling or connection are adopted is comparatively convenient and practical, but ubiquity bolt and is subjected to long rotation, the vibrations nut is prone to loosening, caducous situation happens occasionally, bring a lot of unsafe factors, thereby the normal operation and the safety in production of machinery have been influenced, easily produce immeasurable economic loss and social influence, cause danger and consequence comparatively serious, transmission device rotatingshaft as Motor Vehicle, the bolton that vehicle wheels etc. adopt connects, becoming flexible of bolt, the cruising and the safety that come off and directly affect Motor Vehicle, the bolton that electric mechanical equipment etc. adopt connects, becoming flexible of bolt, come off and directly affect the normal operation of electric mechanical equipment, the life-span of safety in production and electric mechanical equipment, there is bolt shank head naked position, the fastening back of the Bolt Connection of being screw thread easily to produce damage again, damage, corrosion etc., comparatively difficult during the demounting bolt maintenance, shortcomings such as the time-consuming effort of taking a lot of work, for overcoming above-mentioned existing deficiency, the utility model has designed a kind of recessed cap lock bolt.

The purpose of this utility model provide a kind of fastening locking state that is in, bolt is subjected to long rotation, vibrations nut to be difficult for becoming flexible, coming off, avoid unsafe factor, improve that machinery is normally moved, safety in production and life-span, the sealing of Bolt Connection fastening screw tightening latch head, demounting bolt flexibly and fast easy, simple and compact for structure recessed cap lock bolt of when maintenance.

The utility model is achieved in that the upper center at bolt shank is drilled with round slot bore, in the upper center round slot bore of bolt shank, be with internal thread, nut is installed on bolt shank, the recessed cap that following inside is the recessed circle of opening is installed on the top of nut, the middle part, top has the perforation circular hole on recessed cap, the end round edge face of recessed cap contacts with round edge face on the nut, the top head end of bolt shank is positioned among the recessed circle of following inside opening of recessed cap, spring washer and screw are installed on the upper-end surface of recessed cap, have outside thread on the screw rod, the middle part, top of going up that screw rod runs through spring washer and recessed cap connects behind the circular hole to contact with bolt shank upper center round slot bore internal thread and is locked.

The fastening locking state that is in of the utility model, bolt is subjected to long rotation, the vibrations nut is difficult for loosening, come off, avoided a lot of unsafe factors, the normal operation and the safety in production of machinery have been improved, avoided causing the generation of dangerous consequences such as economic loss and social influence, Motor Vehicle cruising and safety have particularly been improved, improved the normal operation of electric mechanical equipment, safety in production and electric mechanical equipment life-span, the bolt shank head sealing of the fastening back of Bolt Connection does not expose, the bolt shank screw thread is difficult for producing damage, damage, corrosion, comparatively convenient during the demounting bolt maintenance, the time and labour saving is laborsaving, flexibly and fast easy, effect is obviously remarkable, has safe and reliable, and simple and compact for structure, be easy to make and apply advantage such as with low cost.

Concrete structure of the present utility model and embodiment are provided by the following drawings.

Fig. 1 shows schematic representation for general structure partial cutaway of the present utility model.

To be described in further detail concrete structure of the present utility model and embodiment below in conjunction with accompanying drawing.

Shown in accompanying drawing 1: the upper center at bolt shank 5 is drilled with round slot bore, in the upper center round slot bore of bolt shank 5, be with internal thread, nut 4 is installed on bolt shank 5, the recessed cap 1 that following inside is the recessed circle of opening is installed on the top of nut 4, the middle part, top has the perforation circular hole on recessed cap 1, the end round edge face of recessed cap 1 contacts with round edge face on the nut 4, the top head end of bolt shank 5 is positioned among the recessed circle of following inside opening of recessed cap 1, spring washer 2 and screw 3 are installed on the upper-end surface of recessed cap 1, have outside thread on screw 3 bars, the middle part, top of going up that screw 3 bars run through spring washer 2 and recessed cap 1 connects behind the circular hole to contact with bolt shank 5 upper center round slot bore internal threads and is locked.

Claims

1, a kind of recessed cap lock bolt, it is by bolt shank (5), nut (4), spring washer (2) and screw (3) are formed, it is characterized in that: the upper center at bolt shank (5) has round slot bore, in the upper center round slot bore of bolt shank (5), has internal thread, on bolt shank (5), has nut (4), have following inside on the top of nut (4) and be the recessed cap (1) of the recessed circle of opening, the middle part, top of going up at recessed cap (1) has the perforation circular hole, the end round edge face of recessed cap (1) is gone up the round edge face with nut (4) and is contacted, the top head end of bolt shank (5) is positioned among the recessed circle of following inside opening of recessed cap (1), on the upper-end surface of recessed cap (1), have spring washer (2) and screw (3), have outside thread on screw (3) bar, the middle part, top of going up that screw (3) bar runs through spring washer (2) and recessed cap (1) connects behind the circular hole to contact with bolt shank (5) upper center round slot bore internal thread and is locked.