CN2195650Y

CN2195650Y - Anti-loosing screw bolt

Info

Publication number: CN2195650Y
Application number: CN 94207338
Authority: CN
Inventors: 徐业明
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-03-16
Filing date: 1994-03-16
Publication date: 1995-04-26
Anticipated expiration: 2004-03-16

Abstract

The utility model discloses an anti-loosing screw bolt. The utility model is characterized in that screw threads on a screw rod and a screw nut both form an inclining teeth barb shape, an alpha angle is 40 to 45 DEG, a beta angle is 8 to 12 DEG, and the screw bolt and the screw nut are connected with each other in a barbed way. The screw threads which have the advantages of strong fastening performance and high bearing capacity can avoid the accident caused by the loosing and falling off of the screw bolt because of vibration. The sealing degree between the screw threads is high, the purpose is wide and the anti-loosing and self-locking purpose can be achieved without using any fastener.

Description

Anti-loosing screw bolt

The utility model relates to a kind of fastening connection piece, specifically a kind of chek bolt.

Bolt is cooperatively interacted through screw thread with nut by screw rod and is connected, and regular screw threads are 60 ° of degree angles, and other also has trapezoidal thread, buttress thread form, straight pipe thread, taper pipe thread.These screw threads vibrations locking aspect self-lock ability poor, need carry out locking with fastener openings resilient pad or flat gasket, will relax and come off but vibrations surpass the certain limit of packing ring, as make automobile, train screw pine body, cause tire to fly out to cause the generation of human casualty accident.

The purpose of this utility model is to avoid above-mentioned deficiency of the prior art, and a kind of chek bolt is provided.

The utility model can reach by following measure:

Chek bolt is made up of screw rod and nut, its special way is, screw thread form on screw rod and the nut is that oblique tooth is barb-like, internal thread α angle is 40～45 °, outside thread angle β is 8～12 °, the contact of the mutual barb of this screw rod and nut, under the impact of shaking force according to mechanics principle, make nut not have possibility of retreating, on the contrary nut can shake more cooperate with screw rod tight more.

The drawing of accompanying drawing is described as follows:

Fig. 1 is locking screw-rod structure schematic representation.

Fig. 2 is the lock nut structural representation.

Fig. 3 is that locking screw rod and nut are used phase diagram.

Among the figure: 1-is barb-like oblique tooth tiltedly, 2-screw rod, 3-nut.

The utility model is described in further detail below in conjunction with accompanying drawing embodiment:

Be barb-like oblique tooth 1 by the screw thread on the screw rod 2 shown in Figure 1, the pitch that screw thread φ is 16 millimeters is 2.5 millimeters, than long 0.5 centimetre of common pitch, as φ shown in Figure 1 16 screw threads are cut open with the contrast of the regular screw threads of identical size in the footpath want big 20～30 roads, so the checknut strength is higher than regular screw threads strength 50%.Processing the barb-like checknut of oblique tooth will be to original instrument such as screw tap, screw die, frustrate processing such as filament plate improves, make the bolt that processes as shown in Figure 3 screw thread α angle be 45 °, the β angle is 10 °, and worm tooth adds and requires man-hour the worm tooth engagement spacing can not be greater than tolerance.

Can not twist with hand as bolt when using chek bolt, because the engagement between the oblique barb-like worm tooth 1 as shown in Figure 3 on screw rod and the nut is very closely, friction is bigger between them, want lubricating oil filling during use, reduce the friction of worm tooth, from the beginning be tightened to the end with spanner, in the vibrations process, be oblique tooth barb shape owing to screw thread, know according to Mechanics Calculation: nut 3 can not be retreated, can only slowly move, so chek bolt need not just can play the locking effect of self-locking by any add-on parts to tightening direction.

The utility model compared with prior art has following advantage:

1, the check bolt tightness is strong, is subjected to the force intensity height, can avoid because the accident generation that the vibrations bolt is relaxed, come off and cause.

2, tightness height between the utility model ridge need not reach locking self-locking purpose by any securing member.

Claims

1, a kind of chek bolt is made up of screw rod and nut, it is characterized in that: the screw thread on screw rod and the nut is that oblique tooth is barb-like, and internal thread α angle is 40～45 °, and outside thread angle β is 8～12 °.