CN1260030A

CN1260030A - Washer for locking of nut and locking structure of nut

Info

Publication number: CN1260030A
Application number: CN 97182274
Authority: CN
Inventors: 土川善司
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-04
Filing date: 1997-07-04
Publication date: 2000-07-12
Anticipated expiration: 2017-07-04
Also published as: CN1114766C

Abstract

A washer comprises a ring-shaped washer body provided with a bolt insertion hole extending vertically in the center of the washer and formed at least one of upper and lower surfaces thereof with a gently inclined surface inclining in one direction. When a nut (B) together with a washer (A) is threaded onto a bolt (D) to be fastened against a member (C), with a predetermined torque, a lower surface of the nut (B) come into close contact with an upper surface of the washer (A) and an inclined seat surface comes into pressure contact with an upper surface of the member (C) being fastened, whereby pressure in a direction of bolt axis and a surface pressure on the member (C) being fastened are simultaneously generated to effectively prevent loosening of the nut.

Description

The locking anti-loose structure of nut with packing ring and nut

Technical field

The present invention relates to the loosening packing ring that is prevented of the standard nut that uses together and use the anti-loose structure of the nut of this packing ring.

Background technique

At present, as preventing that nut from use producing loosening device, many structures of nut self having been thought various ways are arranged.For example, generally we know, on nut body, pack into metallic elastic plate and elastomers such as nylon sheet or spring, and it is as a whole that nut body is done.

But, because this structure is all processed the add-on parts of packing into through 2 times on nut body, so the trouble of making and cost raise, simultaneously, because of the elastomer of packing into originally from the screw-in bolt has added high moment of torsion, so fasten operation bothers very much, and in use anti-loosing effect is worsened because of elastomeric timeliness changes.

Therefore, in view of the foregoing, main purpose of the present invention is, make improvements by packing ring use simultaneously, thereby to provide a kind of packing ring that makes existing standard nut bring into play powerful anti-loosing effect with existing packing ring cost much at one.

Another free-revving engine of the present invention provides a kind of anti-loose structure that uses the nut of above-mentioned packing ring.

Disclosure of an invention

For achieving the above object, the present invention adopts following technological scheme.That is, of the present inventionly lockingly make following structure with packing ring: at least one side's the face that will have loop pads circle body 2 top and bottom of the bolt through hole 1 that connects the axle center forms the plane of inclination that slowly tilts to a direction.

In packing ring of the present invention, the tilt angle alpha of the seat surface 3 of described packing ring is configured in possible angular range: when with nut B with packing ring A screws with bolt D together and fasten when being captive on the member C with the moment of torsion of regulation, be close to below the nut B packing ring A above, inclination seat surface 3 and the top crimping that is captive member C, thus, towards bolt axis to pressure produce simultaneously with the relative surface pressure that is captive member C.

In addition, in the present invention, the characteristics of the anti-loose structure of nut are, at least one side's of loop pads circle body 2 top and bottom by will having the bolt through hole 1 that connects the axle center seat surface 3 forms to the plane of inclination that a direction slowly tilts and constitutes packing ring A, this packing ring A placed the following of nut B and with nut B and bolt D screws and fasten and be captive on the member C with the moment of torsion of regulation, thereby make the following of nut B and be close to above the packing ring A, and make the inclination seat surface 3 and the top crimping that is captive member C of packing ring, thus, produce simultaneously towards bolt axis to pressure be captive the surface pressure of member C and prevent the loosening of nut with relative.

The simple declaration of accompanying drawing

Fig. 1 is an expression locking broken section plan view with packing ring one embodiment of the present invention.

Fig. 2 is the plan view of described packing ring.

Fig. 3 is the sectional view of the described packing ring using process of expression.

Fig. 4 is the sectional view of the described packing ring user mode of expression.

Detailed description of the invention

In the drawings, symbol A is a packing ring of the present invention, on the spacer ring body 2 that the ring bodies by sheet metal system forms, has the bolt through hole 1 that connects the axle center.And below it, be that seat surface 3 forms the plane of inclination that slowly tilt to a direction.

The tilt angle alpha of this seat surface 3 is configured in possible angular range: when with standard nut B with packing ring A screws with bolt D together and fasten when being captive on the member C with the moment of torsion of regulation, be close to above the following and packing ring A of nut B, inclination seat surface 3 and the top crimping that is captive member C, thus, towards bolt axis to pressure produce simultaneously with the relative surface pressure that is captive member C.

This angle of inclination, be that seat surface angle α is different because of size, preferably about 1.0～3.0 degree.In addition, the moment of torsion of fastening of the regulation that what is called is above-mentioned is fastened moment of torsion according to the standard of standard nut, or refers to increase the moment of torsion about 10% thereon, for example, for the hexagonal metal nut of M12, is 450～500kgfcm.

As shown in Figure 3, the packing ring A of above-mentioned such structure uses with nut B.When to be captive member C and make along bolt D precession nut B packing ring A be captive member C above when exerting oneself anchor bolt B with prescribed torque again after contacting, as shown in Figure 4, nut B just has been crowded with the gap of the thread engagement part between bolt, nut, and the inclination seat surface 3 along packing ring A is fixed into inclination attitude with compulsory form simultaneously.Under this state, shown in arrow among Fig. 4, the screw thread that is positioned at the upper side of inclination of nut B is oppressed the bolt side with the screw thread that is positioned at the next side to cutting direction, simultaneously, inclination seat surface 3 is with the face way of contact and the top crimping that is captive member C, can be by this internal stress thread engagement of locking nut B and bolt D securely, thus it is loosening to prevent that nut B from producing.

In addition, it is that 26mm, internal diameter are that 12.2mm, maximum ga(u)ge are that 2.8mm, minimum thickness are the iron packing ring of M12 nut of 1.8mm (this moment, seat surface angle α was 2.3 degree) that the present inventor has made external diameter, result according to the nut anti-looseness vibration test of third-party test center, 4 of standard nuts are all loosening with interior generation at 20 seconds, but and the nut vibration resistance of 4 samples all is more than 14 minutes.The moment of torsion of fastening of the nut of this occasion all is 500kgfcm.

More than although understand one embodiment of the invention, but the present invention not merely is defined in these example structure.For example in the above-described embodiments, also can the plane of inclination that be located at below the spacer ring body is located in the above, or symmetry is located at top and bottom, also can obtain same effect.In addition, gasket materials also is not limited to iron or stainless steel and other metal materials, forms for the also available synthetic resin material of undersized packing ring.The shape of packing ring also is not limited to circle, can form with hexagon or arbitrary shape such as square.

Claims

1. packing ring, it is characterized in that, at least one side's seat surface (3) with loop pads circle body (2) top and bottom of the bolt through hole (1) that connects the axle center is formed to the plane of inclination that a direction slowly tilts and constitutes packing ring (A), the angle of inclination of this inclination seat surface (3) is configured in possible angular range: when with nut (B) with packing ring (A) screws with bolt (D) together and fasten when being captive member (C) and going up with the moment of torsion of regulation, be close to above the following and packing ring (A) of nut (B), and inclination seat surface (3) and the top crimping that is captive member (C), thus, towards bolt axis to pressure produce simultaneously with the relative surface pressure that is captive member (C).

2. the anti-loose structure of a nut, it is characterized in that, at least one side's of loop pads circle body (2) top and bottom by will having the bolt through hole (1) that connects the axle center seat surface (3) forms to the plane of inclination that a direction slowly tilts and constitutes packing ring (A), this packing ring (A) placed the following of nut (B) and nut (B) and bolt (D) screwed and fasten and be captive on the member (C) with the moment of torsion of regulation, thereby make nut (B) following and packing ring (A) above be close to, and inclination seat surface (3) that makes packing ring and the top crimping that is captive member (C), thus, produce simultaneously towards bolt axis to pressure be captive the surface pressure of member (C) and prevent the loosening of nut with relative.