CN2103041U

CN2103041U - Combined locknut

Info

Publication number: CN2103041U
Application number: CN 91223429
Authority: CN
Inventors: 蒋志忠
Original assignee: Individual
Current assignee: Individual
Priority date: 1991-08-21
Filing date: 1991-08-21
Publication date: 1992-04-29

Abstract

The utility model relates to a combined locknut which comprises a main nut and an auxiliary nut. The utility model is characterized in that the inner edge of the main nut forms an inside thread and the outer edge of the main nut forms an outside thread; the inner edge of the auxiliary nut forms inside threads with unequal diameters; The outside thread of the main nut has an equal thread pitch with one of the inside threads of the auxiliary nut, and the outside thread of the main nut and one of the inside threads of the auxiliary nut are mutually screwed; The inside thread of the main nut has an equal thread pitch with the other inside threads of the auxiliary nut, and screw bolt penetrating the workpiece can be screwed in the inside thread of the main nut and the other inside threads of the auxiliary nut; the inside thread and outside thread screwed by the main nut and the auxiliary nut have an unequal thread pitch with the inside thread screwed by the main nut, the auxiliary nut and the screw bolt.

Description

Combined locknut

The utility model is relevant for a kind of combined type lock nut; The combined type lock nut that particularly a kind of fastening effect is very good.

The general mechanical workpieces or the combination of member; As shown in Figure 1, often adopt the mode of bolt 11 attaching nuts 12, yet that this traditional consolidation style is easy to but because of the vibrations of parts or alternate load is loosening gradually, may causes to come off and cause parts to fix or to run well.

Many different locking nuts being arranged on the market, but many disappearances are still arranged, make after the locking still not solidly, loosening easily, below is the shortcoming of locking nut in the past:

(1) see also Fig. 2, shown in Figure 2 is in the past nut, and with nut 12 fit spring washers 13, the outside thread 111 that makes bolt 11 by spring washer 13 is tight against mutually with the internal thread 121 of nut 12, strengthens frictional force, and the foundation of this nut check is:

1. the packing between outside thread 111 and the internal thread 121.

2. strengthen the packing degree with the elastic force of spring washer 13.

But spring washer 13 itself has elasticity, so still have the phenomenon that makes packing ring moment contraction and cause nut loosening when parts shake.

(2) see also Fig. 3 again, by shown in Figure 3 be on bolt 21 and nut 22, respectively to be provided with perforate 23 and to slot 24, and run through perforate 23 and slot 24 with cotter pin 25, loosening to prevent nut 22, yet 24 peripheries that can't be evenly distributed on nut 22 numerously of slotting, between the fluting 24 distance is arranged still, and in order to cooperate running through of cotter pin 25, so possible nut 22 can't be in the state that the best is tight against workpiece, so will reduce the packing degree between the internal thread of the outside thread of bolt 21 and nut 22, so the foundation of this nut check only has: the cotter pin 25 that through bolt 21 and nut are 22.

Therefore, only can guarantee that nut does not come off, and still may cause between nut and the bolt loosening phenomenon, and it is more time-consuming to wear cotter pin 25, other locking mode therefore occurred.

(3) see also Fig. 4, shown in Figure 4 is to utilize

double nut

12,13 state of locking continuously, utilize the nut 13 on upper strata to strengthen preventing the loosening of lower floor's nut 12 that the effect of strengthening locking is arranged really, and the foundation of this nut check is: the double locking of upper and lower two-

layer nut

12,13.

Though this nut has preferable locking effect, upper and lower nut is the design of same pitch, so upper and

lower layer nut

12,13 still might become flexible under long-term vibration environment.

Main purpose of the present utility model is that a kind of combined type lock nut is being provided, and can reach the effect that can lock really.

Major character of the present utility model is to be provided with the major and minor nut of different pitch, and major and minor nut can lock and then increase mutual packing degree and frictional force mutually, makes the utlity model has to prevent the effect becoming flexible, can lock really.

Technology for achieving the above object, means are now enumerated preferred embodiment and conjunction with figs., after being described in more detail in.

Brief Description Of Drawings:

Fig. 1 to 4 is the nut of prior art, the assembled sectional view of bolt.

Fig. 5 is the three-dimensional exploded view of the utility model preferred embodiment.

Fig. 6 is the assembled sectional view of the utility model preferred embodiment.

Fig. 7 is the enlarged diagram of 83 parts of Fig. 6.

Fig. 8 is the enlarged diagram of 84 parts of Fig. 6.

Fig. 9 is the assembled sectional view of another preferred embodiment of the utility model.

At first, see also the three-dimensional exploded view that Fig. 5 is the utility model preferred embodiment; Please cooperate and consult the assembled sectional view that Fig. 6 is the utility model preferred embodiment user mode, learn by Fig. 5 and Fig. 6, the utility model consists predominantly of mother nut 41 and secondary nut 42, the inner edge of mother nut 41 is formed with internal thread 411, outer rim is formed with outside thread 412, the inner edge of secondary nut 42 is formed with the internal thread 421 of irregular pitch respectively, 422, and the outside thread 412 of mother nut 41 and the internal thread 422 of secondary nut 42 have equal pitch and can twist mutually and close, the internal thread 411 of mother nut 41 and secondary nut 42, internal thread 421 has equal pitch and can supply to run through parts 51 in regular turn, 52 bolt 6 is screwed into, the internal thread 411 of mother nut 41 and secondary nut 42,421 with the outside thread 412 of mother nut 41 and secondary nut 42, internal thread 422 has unequal pitch.

See also Fig. 6, operation procedure of the present utility model is earlier mother nut 41 and bolt 6 to be tightened, and is tightened with the outside thread 61 of bolt 6 by the internal thread 421 of secondary nut 42 again, simultaneously, is tightened just with the internal thread 411 of mother nut by the internal thread 421 of secondary nut 42 and to finish.

See also Fig. 6, as above-mentioned combination, when mother nut 41 is twisted the packing effect that first road is just arranged when closing bolt 6, again secondary nut 42 is screwed into bolt 6 and mother nut 41 synchronously, when secondary nut 42 is tight against mother nut 41,

secondary nut

42 and 6 on bolt have just produced the second road packing effect, can prevent further that mother nut 41 is loosening, and because the pitch at 81 places and 82 places does not wait, so internal thread 422 of secondary nut 41, just produced tooth difference phenomenon between the internal thread 411 of mother nut 41 and the bolt 6, and this tooth difference phenomenon just becomes the packing effect in the 3rd road, as figure seven, respectively 83 of Fig. 6 shown in eight, the local enlarged diagram of 84 parts, as seen from Figure 7, mother nut 41 can be against 85 places, both sides with the screw thread of bolt 6 mutually after stubborn closing, as shown in Figure 8, secondary nut 42 and the screw thread of bolt 6 can be against 86 places of both sides mutually after stubborn closing, by 85, the opposition phenomenon that 86 balance or cancel each other closes face, prevent that interactive phenomenon from producing, and more can increase mother nut 41 and have, packing degree between secondary nut 42 and the bolt 6.

The continuous Fig. 9 that sees also, the utility model be in the use according to user's hobby, can be arbitrarily the internal and external screw thread of mother nut 41 and secondary nut 42 be fallen setting and also equal effect can be arranged mutually.

Comprehensive the above, the utility model can produce three road packing effects, so than more can promote effect in the past.

Claims

1, a kind of combined type lock nut, comprise mother nut and secondary nut, it is characterized in that: the inner edge of described mother nut is provided with internal thread and outer rim is provided with outside thread, described secondary nut inner edge is provided with two kinds of anisodiametric internal threads, one of them internal thread of the outside thread of described mother nut and described secondary nut has equal pitch and can twist mutually and close, another internal thread of the internal thread of described mother nut and described secondary nut has equal pitch and is screwed into for the bolt that runs through parts, described mother nut and described secondary nut twist mutually close in, outside thread and described mother nut, secondary nut is twisted the internal thread that closes mutually with described bolt and is had unequal pitch.