CN2140441Y

CN2140441Y - Anti-loose fastener assembly

Info

Publication number: CN2140441Y
Application number: CN 92234768
Authority: CN
Inventors: 董锡光
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-10-06
Filing date: 1992-10-06
Publication date: 1993-08-18
Anticipated expiration: 2002-10-06

Abstract

The utility model relates to an anti-loose fastener assembly which is composed of a nut cap, a screw bolt and a positioning non-return shim. The nut cap comprises a force receiving part (1), a saw tooth groove (2) and a projection force receiving end face (3). The connected part between the force receiving part (1) and the saw tooth groove (2) form an R face transition. The projection force receiving end face (3) is higher than the saw tooth groove (2). The bottom part of a threaded rod (4) is provided with a positioning non-return groove (5). The outer ring (11) of the positioning non-return shim is uniformly distributed with an elastic non-return guard sheet (groove) (6). The positioning non-return shim can be divided into a positioning convex sheet type and a positioning foot type. The utility model can achieve the purpose that the nut cap and the screw bolt can not loose in the occasion with larger amplitude and strength vibration, having the advantages of low cost and simple procedure of installation.

Description

Anti-loose fastener assembly

The utility model relates to a kind of fastening fixed object that needs that is used for, and makes it the location, prevents that fastened object is loosening, displacement anti-loosening tightly because of assembly.

At present, people are at the vibration frequency height, carry out the installation of workpiece on the big object of amplitude, during steady job, because nut and bolt in for a long time big frequency, release under the violent oscillatory motion, cause the loosening of fastened object in order to prevent, displacement generally is to adopt to add a split ring packing ring under nut; On the nut of having tightened, add and twist a nut or in the boring of bolt one end, treat that nut is tightened after, insert locking key again, prevent the nut loose or dislocation.But long-term facts have proved, said method uses under general vibration frequency and amplitude still can, but at the vibration frequency height, use under the big occasion of amplitude, just be difficult to avoid nut and bolt to release, the loosening of fastened object take place, displacement, thereby cause the accident, and be difficult to take precautions against artificial intentional destruction.In addition, the workpiece of having relatively high expectations for tautness, when construction, adopt some specific process, but be mostly disposable fastening means, meeting and to keep in repair, during situations such as demolition or travelling workpiece, often to adopt destructive demolition mode, cause the damage of nut and bolt, and working procedure is comparatively numerous and diverse, cost is also higher.

The purpose of this utility model is intended to overcome above-mentioned the deficiencies in the prior art, propose a kind of can be at the vibration frequency height, fixedly mount on the big occasion object of amplitude, simplify installation procedure, reduce production costs and can prevent the anti-loosening fastener assembly of artificial destruction.

The purpose of this utility model can reach by following measure.

Anti-loosening fastener assembly described in the utility model is made up of nut, bolt and location non-return pad.Nut can be divided into three parts, both the forced section part; Serrated slot part and protuberance force side face portion.The forced section of nut is a polyhedron, forced section is the transition of R face with the position that links to each other of serrated slot, the stressed end face of protuberance is above serrated slot, the screw rod bottom of bolt is processed with the location stop-return slot, be uniformly distributed with elasticity non-return washer on the outer ring of location non-return pad, location non-return pad can be divided into Convex sheet type and angle type, the location Convex sheet type is that a location lug is arranged on the inner ring edge of location non-return pad, difference according to use occasion, also the location lug can be set on the edge of the inner ring of location non-return pad, but getting under the end face curvedly on the outer ring, make it to become angle.Elasticity non-return washer, the position on non-return pad outer ring, location should be able to coincide mutually with the serrated slot on the nut, the length of the location lug on the non-return pad inner ring edge, location with wide should be consistent in the location stop-return slot on the screw rod of bolt.For making things convenient for releasing of nut and bolt, be provided with 8 word collars.

Below in conjunction with drawings and Examples anti-loosening fastener assembly described in the utility model is described in further detail.

Fig. 1 .2.3 is the schematic representation of anti-loosening fastener assembly nut described in the utility model, sectional view and plan view.

Fig. 4 is the schematic representation of anti-loosening fastener assembly bolt described in the utility model.

Fig. 5 is the vertical view cutaway drawing that has stop-return slot screw rod position, location of anti-loosening fastener assembly bolt described in the utility model.

Fig. 6 .7.8 is schematic representation, side view and the plan view of anti-loosening fastener assembly described in the utility model location non-return pad.

Fig. 9 is the schematic representation of anti-loosening fastener assembly collar described in the utility model.

Anti-loosening fastener assembly of the present utility model is made up of nut, bolt and location non-return pad.Nut is divided into three parts, both the forced section part; Serrated slot part and location non-return pad part.The forced section 1 of nut is a polyhedron, and it is excessive that forced section 1 and the position that links to each other of serrated slot 2 are the R face, and the stressed end face 3 of protuberance is above serrated slot 2.The diameter of serrated slot 2 is less than forced section 1, and greater than the stressed end face 3 of protuberance.Nut is that the center has through hole with the center of circle, and internal thread is arranged.The bottom of the screw rod 4 of bolt has location stop-return slot 5, when construction is used, select the length of the location stop-return slot 5 on the screw rod 4 to be longer than the bolt that screw rod 4 inserts in residue screw rod 4 length behind the fastened object, so just can better play the effect of locating non-return.Therefore when producing in batches, can be manufactured on the bolt of the location stop-return slot 5 that is processed with different length on the screw rod 4, select for the user.Be uniformly distributed with elasticity retrace sheet 6 on the outer ring 11 of location non-return pad, can coincide mutually with the serrated slot 2 on the nut when this elasticity non-return washer 6 will make setter install in the position on the non-return pad of location.The width requirement of elasticity non-return pad 6 is slightly wideer than the width of serrated slot 2 simultaneously, location non-return pad can be divided into location Convex sheet type and angle type, the location Convex sheet type be have on the edge of the inner ring 10 of location non-return pad one with the screw rod 4 of bolt on the length of location stop-return slot 5 with wide consistent, mutual identical location lug 7.Stressed bigger at screw rod 4, under the desired strength condition with higher, can be when construction, the bolt that does not have location stop-return slot 5 on the screw rod 4 of use bolt, at this simultaneously, use the angle type location non-return pad that location lug 7 is not set on the inner ring 10 of locating the non-return pad, on the outer ring 11 of location non-return pad, get under the end face exactly and bend, the location non-return pad of angle 8 is set.The circle of going up of the 8 font collars that are provided with for ease of loosening nut encloses less than following, and the bottom of following circle is the opening shape, and an outstanding end face 9 is arranged on two opening pin, is convenient to insert between serrated slot 2 and the elasticity non-return washer 6.The distributed quantity of elasticity non-return washer 6 on the outer ring 11 of location non-return pad in addition, to decide according to stressing conditions with to the requirement of tautness, therefore, during batch process, make the elasticity non-return washer 6 that different distributions quantity is arranged on the outer ring 11 of locating the non-return pad; The location non-return pad of location Convex sheet type and angle type.

Fastener assembly described in the utility model, need carry out fastening or when location being applied to fastened object, screw rod 4 with bolt inserts fastened object earlier, to locate the non-return pad again puts on the screw rod, and the location stop-return slot 5 that the location lug 7 on the edge of location non-return pad inner ring 10 is aimed on the screw rod 4 also inserts therebetween, make it to coincide mutually the location.Then that the stressed end face of the protuberance of nut 3 is downward, tighten by the internal thread of nut and the outside thread rotation of bolt, and the active force that applied acted on the non-return pad of location by the stressed end face 3 of protuberance, make that elasticity non-return washer 6 coincide mutually with the serrated slot 2 on the nut on the non-return pad outer ring 11, location, sting tight.Like this by in the location stop-return slot 5 on the screw rod 4 of location lug 7 inserting bolts on the location non-return pad inner ring 10 and serrated slot 2 contrapositions on the elasticity non-return washer 6 on the non-return pad outer ring, location 11 and the nut, sting tight, with location non-return pad is intermediary, nut and bolt are positioned, non-return, thus prevented because nut and bolt releasing of being subjected to that external force effect or vibration etc. cause caused becoming flexible of fastened object, displacement, accidents caused.In addition in some cases because bolt stressed bigger, when desired strength is higher, can use the bolt that on the screw rod 4 of bolt, does not have location stop-return slot 5, at this moment need be long with the angle 8 of locating on the non-return pad outer ring 11 one of processing on the fastened object, the locating slot that width is consistent with each other, after the screw rod of bolt inserts fastened object, to locate the non-return pad again and be inserted in screw rod, and the angle 8 that will locate on the non-return pad outer ring 11 inserts the locating slot of being opened on the fastened object, and the interior fastening locating effect of location stop-return slot on the screw rod 4 of location lug 7 inserting bolts on its effect and non-return pad inner ring 10 edges, location 5 is identical.At the loosening nut of needs, when making it to break away from bolt, can order and use collar to snap in the serrated slot 2 of nut and the centre of the elasticity non-return washer 6 of location non-return pad, and slightly firmly to pressing down collar, change the identical state of serrated slot 2 and elasticity non-return washer 6, break away from mutually, just can become flexible rotation.

Anti-loosening fastening assembly described in the utility model compared with prior art has substantial progress and obvious advantage. Existing fastening assembly otherwise can not effectively prevent nut on the fastened object and bolt in vibration frequency, the amplitude phenomenon that releases when big. Cause the loosening of fastening object, displacement, thus accidents caused. Though can guarantee nut on the fastened object and the tautness of bolt, be difficult for demolition, need fastened object maintenance meeting, when mobile, often owing to being disposable fastening means, when carrying out demolition, very easily operate nut and bolt, working procedure is comparatively numerous and diverse, and cost is also higher. And anti-loosening fastening assembly described in the utility model can guarantee bolt on the fastened object and nut can not release phenomenon, for example engine cylinder cover in the big situation of vibration frequency and amplitude; Rail Etc. the coupling part. Can use again in general object junction, installation procedure is also uncomplicated, and cost is also lower. And in the time need to advancing to become flexible to the nut on the fastened object and bolt, use Special clamp ring just can grasp very easily and do, if still do not use Special clamp ring then be difficult to reach loosening purpose, can avoid artificial destruction like this.

Claims

1, a kind of anti-loosening fastener assembly of forming by nut, bolt and location non-return pad, it is characterized in that nut is divided into forced section 1, stressed end face 3 three parts of serrated slot 2 and protuberance, forced section 1 is a polyhedron, forced section 1 is the transition of R face with the position that links to each other of serrated slot 2, the stressed end face 3 of protuberance is above serrated slot 2, and the bottom of the screw rod 4 of bolt has location stop-return slot 5, is uniformly distributed with elasticity non-return washer 6 on the outer ring 11 of location non-return pad.

2, anti-loosening fastener assembly according to claim 1, the diameter that it is characterized in that serrated slot 2 be less than forced section 1, and greater than the diameter of the stressed end face 3 of protuberance.

3, anti-loosening fastener assembly according to claim 1 is characterized in that locating the non-return pad and can be divided into location Convex sheet type and angle type.

4, according to claim 1,3 described locking fastener assemblies, it is characterized in that locating on the edge of inner ring 10 of location non-return pad of Convex sheet type and a location lug 7 is arranged, the width and the equal in length of the width of this location lug 7 and the location stop-return slot 5 of length and screw rod 4 bottoms.

5,, it is characterized in that the end face of outer ring 11 of location non-return pad of angle type is down curved and be angle 8 according to claim 1,3 described anti-loosening fastener assemblies.