CN201133408Y

CN201133408Y - Anti-loose fastening bolt

Info

Publication number: CN201133408Y
Application number: CNU2007201745801U
Authority: CN
Inventors: 于洋
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-06-13
Filing date: 2007-08-31
Publication date: 2008-10-15
Anticipated expiration: 2017-08-31

Abstract

The utility model relates to a mechanical product, a locking fastening bolt promptly. The bolt 1 consists of a nut 5, a screw 6 and a nut 4, wherein the screw is provided with a key groove 7 along the axial direction, and a key sleeve 3 matched with the screw 6 and the key groove 7 is arranged on the screw. The improvement lies in that: the end surfaces of the key sleeve 3 and the nut 4 are both convex-concave uneven and can be matched with each other. By adopting the technical scheme, the anti-loose fastening bolt has the advantages that the contact end surfaces of the nut 4 and the key sleeve 3 are mutually limited, and the relative rotation is difficult after the bolt is tightened, so that the aim of preventing the nut 4 from loosening is fulfilled.

Description

Locking clamping bolt

Technical field

The utility model relates to a kind of engineering goods, promptly a kind of locking clamping bolt.

Background technique

Bolt is a kind of link commonly used, is made up of nut, screw rod and the nut that matches.The subject matter that existing bolt exists is loosening easily.Particularly at some vibrations positions, the bolt of tightening is understood the counterrotating of nature and is become flexible, thereby brings fault and hidden danger for the operation of machinery.For example the bolt on the railroad rail just because become flexible necessary regular check and reinforcing, not only needs to expend a large amount of man power and materials, and hard to guard against, causes various faults frequently.Owing to worry nut loosening, the workman often the nut overtorquing, gently then makes relevant parts elasticity disappear when construction, and is heavy then cause screw thread damage or screw rod to rupture.In order to address this problem, people have developed spring washer and retainingf key cover, and wherein, spring washer is one not in one plane part of opening and opening both sides, utilize self elasticity that both sides are formed pressure and prevent to become flexible.The key cover is a kind of annulus that is enclosed within on the screw rod, in ring protruding key is arranged, and has the keyway that matches with protruding key on screw rod, and during work, nut is pressed on key and puts, and is limited the counteragent of nut by mutual friction.At present, just adopt this key cover, certain locking effect is also arranged at the axle head of bicycle., no matter be spring washer or key cover, all can not thoroughly solve the problem of nut loosening.Its reason is that helical itself is to tilt, and exists under the situation of extrapolability, and the inclined-plane of two contacts must have the possibility that retreats.And spring washer also provides this thrust backward for becoming flexible when forming end-face friction.Though the key cover can compulsoryly prevent to rotate, and can not block outside thrust, be plane contact between key cover and the nut in addition, can not effectively prevent the derotation of nut.

Summary of the invention

The purpose of this utility model provides and a kind ofly can prevent the nut counterrotating, avoids the loosening locking clamping bolt of nature.

Above-mentioned purpose is realized by following technological scheme: develop a kind of locking clamping bolt, formed by nut, screw rod and the nut that is mated, on screw rod, have keyway vertically, be with an endoporus and have the key cover of protruding key between nut and nut, it is characterized in that: the said key cover end face adjacent with nut all is chimeric surface rough and uneven in surface and that can coincide mutually.

Said chimeric surface is meant: have several grooves on the exterior edge face of the interior edge face of nut and key cover, each groove all is by the cross section triangular in shape groove of two inclined-planes to becoming.

The angle that two inclined-planes of the groove that said formation cross section is triangular in shape tilt is identical, and promptly the angle with the perpendicular reference level of the interior axially bored line of nut or key cover is identical.

Said two inclined-planes that the angle of inclination is identical, with the angle of said reference level all less than 45 degree.

Said two inclined-planes that the angle of inclination is identical are 15 degree with the angle of said reference level.

The angular dimension difference that two inclined-planes of said formation cross section groove triangular in shape tilt is promptly different with the corner dimension of the perpendicular reference level of the interior axially bored line of nut or key cover.

Said two inclined-planes different with the corner dimension of reference level, an inclined-plane is the straight inclined-plane perpendicular with said reference level, another inclined-plane is and the angle of the said reference level gently sloping surfaces less than 30 degree.

The angle of said gently sloping surface and said reference level is 15 degree.

The beneficial effects of the utility model are: because nut and key overlap the groove that contacted end face is provided with mutual intercalation, be difficult to relatively rotate after tightening, thereby preferably resolve the difficult problem of nut loosening.

Description of drawings

Fig. 1 is a kind of embodiment's a plan view;

Fig. 2 is the plan view of this embodiment's parts bolt;

Fig. 3 is the left view of this embodiment's parts bolt;

Fig. 4 is the plan view of this embodiment's parts nut;

Fig. 5 is the right elevation of this embodiment's parts nut;

Fig. 6 is the plan view of this embodiment's parts key cover;

Fig. 7 is the left view of this embodiment's parts key cover.

Among the figure as seen: bolt 1, spring washer 2, key cover 3, nut 4, nut 5, screw rod 6, keyway 7, inclined-plane 8, straight inclined-plane 9, gently sloping surface 10, flange 11, protruding key 12, endoporus 13.

Embodiment

The topmost characteristics of this locking clamping bolt are to be provided with the chimeric surface that can increase frictional force on the end face that key cover 3 and nut 4 are in contact with one another, the form of this chimeric surface is to have the groove that coincide mutually on two faces, and the advantageous cross sections of this groove is leg-of-mutton groove.The angle of forming two inclined-planes of triangular groove can be diversified.Wherein, two inclined-plane symmetries are arranged, i.e. the reference level of inclined-plane and groove both sides, just to overlap the angle of end face of 3 endoporus axis normal identical with nut 4 or key.Also there is angle of inclination, two inclined-planes different.The former shortcoming be that assembling the time is relatively required great effort, but more laborsaving during dismounting, more laborsaving during then a kind of assembling, require great effort the place that can be used for not dismantling during dismounting.It is a kind of to introduce the back below

The embodiment of mode:

As shown in Figure 1, this bolt 1 and a spring washer 2,3 and nuts 4 of key cover match.Bolt 1 is made up of nut 5, screw rod 6, on screw rod 6, has a keyway 7 vertically.There is an endoporus 13 greater than screw rod 6 diameters the centre of key cover 3, have on the inwall of hole one with screw rod 6 on the protruding key 12 that is slidingly matched of keyway 7, the key cover can be enclosed within the outside of screw rod 6, protruding key 12 places in the keyway 7, the key cover can move axially on screw rod 6, and can not rotate around screw axis.On the exterior edge face of key cover 3, have a plurality of grooves, each groove is all by the 8 pairs of one-tenth in two inclined-planes, and wherein, an inclined-plane is more steep straight inclined-plane 10, and another inclined-plane 8 is milder gently sloping surfaces 9.If with the perpendicular imaginary end face of axially bored line in overlapping with nut or key is reference level, so, straight inclined-plane 10 is spent near 90 with the angle of reference level, and the angle of gently sloping surface 9 and reference level is then less than 30 degree, to be advisable about 15 degree.Equally, overlap the groove that the groove on 3 exterior edge faces matches also having on the interior edge face of nut 4 with key.Compared as can be known by Fig. 5 and Fig. 7, both groove crest lines constitute identical drawing.By Fig. 4 and Fig. 5 both inclined-plane reversed in order as can be known of comparing.The inclined-plane order is determined by the rotation direction of bolt, is example with dextrorotation, and when nut 4 dextrorotation, two gently sloping surfaces of groove rub mutually, and when nut 4 counter-rotatings, two straight inclined-planes 10 are relative, and are stuck under the promotion of spring washer 2.That is to say, only allow the direction precession of nut 4, and can not fall back to nut 5.According to general matching requirements, spring washer can not flatten fully, leave some surpluses.When needs take off nut, with the flange 11 on the special tool pushing key cover 3, make key cover 3 and the nut 4 groove disengagement of interlock mutually, the nut 4 that reverses again can unclamp nut.

Claims

1. locking clamping bolt, formed by nut (5), screw rod (6) and the nut (4) that is mated, on screw rod (6), have keyway (7) vertically, be with an endoporus and have the key cover (3) of protruding key (12) between nut (4) and nut (5), it is characterized in that: the end face that said key cover (3) is adjacent with nut (4) all is a chimeric surface rough and uneven in surface and that can coincide mutually.

2. locking clamping bolt according to claim 1, it is characterized in that: said chimeric surface is meant: have several grooves on the exterior edge face of the interior edge face of nut (4) and key cover (3), each groove all is by the cross section triangular in shape groove of two inclined-planes (8) to becoming.

3. locking clamping bolt according to claim 2, it is characterized in that: the angle that two inclined-planes (8) of the groove that said formation cross section is triangular in shape tilt is identical, and promptly the angle with the perpendicular reference level of the interior axially bored line of nut (4) or key cover (3) is identical.

4. locking clamping bolt according to claim 3 is characterized in that: the inclined-plane (8) that said two angles of inclination are identical, with the angle of said reference level all less than 45 degree.

5. locking clamping bolt according to claim 3 is characterized in that: the inclined-plane (8) that said two angles of inclination are identical is 15 degree with the angle of said reference level.

6. locking clamping bolt according to claim 2, it is characterized in that: the angular dimension difference that two inclined-planes (8) of said formation cross section groove triangular in shape tilt is promptly different with the corner dimension of the perpendicular reference level of the interior axially bored line of nut (4) or key cover (3).

7. locking clamping bolt according to claim 6, it is characterized in that: said two inclined-planes (8) different with the corner dimension of reference level, an inclined-plane is the straight inclined-plane (10) perpendicular with said reference level, and another inclined-plane is and the angle of the said reference level gently sloping surfaces (9) less than 30 degree.

8. locking clamping bolt according to claim 7 is characterized in that: said gently sloping surface (9) are 15 degree with the angle of said reference level.