CN212155409U

CN212155409U - Anti-loosening bolt fastening assembly

Info

Publication number: CN212155409U
Application number: CN202020549583.4U
Authority: CN
Inventors: 张大川
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-13
Filing date: 2020-04-13
Publication date: 2020-12-15
Anticipated expiration: 2030-04-13

Abstract

The utility model discloses a bolt-up subassembly that locking takes off, include the bolt, locate screw rod on the bolt, be located by the locking work piece outer pot head cover backing ring on the screw rod, be located backing ring outer end threaded connection be in nut on the screw rod, the outer terminal surface of backing ring is equipped with a plurality of archs along the circumferencial direction, the terminal surface is equipped with a plurality ofly along the circumferencial direction in the nut with the draw-in groove of protruding matching, works as when the work piece is locked, protruding with the draw-in groove joint. Compared with the prior art, the utility model provides a bolt-up subassembly of locking taking off, self-locking ability is strong, and difficult pine takes off, and fastening effect is better, and the reliability is high, has eliminated the potential safety hazard.

Description

Anti-loosening bolt fastening assembly

Technical Field

The utility model relates to a fastener technical field, more specifically say, relate to a bolt-up subassembly that locking takes off.

Background

With the continuous development of science and technology, the fastening combination of bolt and nut is widely applied to various industries in industrial production, and at present, when the nut and bolt are used in a matching way, a flat gasket and a spring pad are usually added to increase the fastening effect and prevent loosening. The structure cannot play a role in preventing loosening fundamentally, the loosening prevention effect is not good enough, and many accidents are caused by loosening of the screw. In many tip, war industry or railway bridge fields, the requirement to the fastener is higher, in case take place to loosen, the consequence is beyond the assumption, has the potential safety hazard. Therefore, a fastening structure with a good fastening effect and capable of effectively preventing loosening is urgently needed to meet the needs of users.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem that exists among the prior art, provide a bolt-up subassembly that locking takes off to the easy pine that exists among the solution prior art takes off, fastens the not good problem of effect.

In order to achieve the above purpose, the technical scheme of the utility model is that:

the utility model provides a bolt-up subassembly of locking taking off, includes the bolt, locates screw rod on the bolt, be located by locking work piece outer pot head at backing ring on the screw rod, be located backing ring outer end threaded connection are in nut on the screw rod, the outer terminal surface of backing ring is equipped with a plurality of archs along the circumferencial direction, the terminal surface is equipped with a plurality ofly along the circumferencial direction in the nut with protruding matched draw-in groove, works as when the work piece is locked, protruding with the draw-in groove joint.

The protrusion is triangular, and the clamping groove is an inverted triangle matched with the triangle.

The slopes of the two slopes of the triangle and the inverted triangle are changed from small to big along the thread rotating direction of the screw rod.

The bulges on the backing ring and the clamping grooves on the nut are uniformly arranged along the circumferential direction of the backing ring or the nut, and the number of the bulges is consistent with that of the clamping grooves.

The protrusions on the backing ring and the clamping grooves on the nut are uniformly arranged along the circumferential direction of the backing ring or the nut, and the number of the clamping grooves is two times or more than two times of the number of the protrusions.

The bolt comprises a head, the screw rod comprises a connecting rod and a threaded rod, one end of the connecting rod is vertically connected with the head, the threaded rod is axially connected with the other end of the connecting rod, and the nut is connected onto the threaded rod.

The external diameter of connecting rod is greater than the external diameter of threaded rod, the connecting rod with be equipped with a plurality of spacing grooves along axial extension on the terminal surface that the threaded rod is connected along the circumferencial direction, the side of spacing groove has the opening.

And a plurality of lugs extending radially inwards are arranged on the inner wall of the inner hole of the backing ring at positions corresponding to the limiting grooves, and the lugs are in sliding connection with the limiting grooves.

The inner end of the nut is provided with a convex ring, the clamping groove is formed in the convex ring, the inner end face of the nut and the outer end face of the backing ring are both inwards concave arc-shaped faces, and the inner end face of the nut is provided with an annular groove for accommodating the connecting rod.

The nut and the backing ring are made of spring steel.

The utility model has the advantages that:

compared with the prior art, the utility model provides a bolt-up subassembly of locking taking off, self-locking ability is strong, and difficult pine takes off, and fastening effect is better, and the reliability is high, has eliminated the potential safety hazard.

Drawings

The following detailed description of embodiments of the present invention is provided with reference to the accompanying drawings, in which:

fig. 1 is a schematic view of the working state of the present invention.

Fig. 2 is a front view of the bolt of the present invention.

Fig. 3 is a perspective view of the bolt of the present invention.

Fig. 4 is a front view of the grommet of the present invention.

Fig. 5 is a perspective view of the grommet of the present invention.

Fig. 6 is a perspective view of the nut of the present invention.

Fig. 7 is a front view of the nut of the present invention.

Fig. 8 is an assembly view of the present invention without the workpiece.

Fig. 9 is a sectional view a-a in fig. 8.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solution adopted by the present invention, and the technical effects obtained by the present invention easy to understand, the following detailed drawings are combined to further explain the embodiments of the present invention.

It should be noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

As shown in fig. 1-6, in an embodiment of the present invention, a bolt fastening assembly for preventing loosening is provided, including a bolt 1, a screw 12 disposed on the bolt 1, a backing ring 2 disposed on the screw 12 and sleeved outside a locked workpiece 4, and a nut 3 disposed on the screw 12 and screwed outside the backing ring 2, wherein a plurality of protrusions 22 are disposed on an outer end surface (away from one end of the workpiece 4) of the backing ring 2 along a circumferential direction, a plurality of slots 33 matched with the protrusions 22 are disposed on an inner end surface (close to one end of the backing ring 2) of the nut 3 along the circumferential direction, the protrusions 22 and the slots 33 are corresponding in size and shape and are used in cooperation, and when the workpiece 4 is locked, the protrusions 22 and the slots 33 are engaged with each other. Because be equipped with draw-in groove 33 on the nut 3, be equipped with on the backing ring 2 with draw-in groove 33 complex arch 22, when nut 3 and backing ring 2 through draw-in groove 33 and arch 22 mutually support the locking back (lock work piece 4 simultaneously) when not receiving under the circumstances such as external force or vibrations, draw-in groove 33 on the nut 3 can not break away from the arch 22 on the backing ring 2, self-locking capability is stronger, under the circumstances that work piece 4 was locked, nut 3 is difficult or can not become flexible or drop at all, nut 3 is reliable and stable with the locking state of backing ring 2, fastening effect is better, the potential safety hazard has been eliminated, workpiece 4 has been guaranteed to be locked reliability and quality of state.

As shown in fig. 4-5, preferably, the protrusion 22 is triangular and the slot 33 is an inverted triangle (or V-shape) that matches the triangle. The protrusion 22 may also be in the shape of an arc, a peak, or the like as needed, and the shape of the corresponding slot 33 is adapted to the shape of the protrusion 22.

As shown in fig. 5 to 6, the slopes of the two slopes of the triangle and the inverted triangle are further increased from small to large along the direction of the rotation of the screw 12. The threads on the nut 3 and the screw 12 are right-handed threads, when the nut 3 is screwed, because the slope of the slope is small, the slope with small slope is stressed, the resistance is small, and great force is not needed, and the nut 3 is fastened by a spanner or a special tool, so that the nut 3 is easily fastened, and the workpiece 4, the backing ring 2 and the nut 3 are locked or fastened together. When the nut 3 needs to be loosened or loosened reversely, the inclined plane with the larger gradient is stressed, the resistance is larger, the nut 3 needs to be loosened by larger force than that during fastening, and the nut is not easy to loosen and has better loosening prevention effect.

As shown in fig. 5 to 6, in a preferred embodiment, the protrusions 22 on the backing ring 2 and the grooves on the nut 3 are uniformly arranged along the circumference of the backing ring 2 or the nut 3, and the number of the protrusions 22 and the number of the locking grooves 33 are the same.

In some other embodiments, the protrusions 22 on the backing ring 2 and the locking grooves 33 on the nut 3 are uniformly arranged along the circumferential direction of the backing ring 2 or the nut 3, and the number of the locking grooves 33 is twice or more than an integer multiple of the number of the protrusions 22. The quantity of arch 22 is less than the quantity of draw-in groove 33, can set up arch 22 spaced apart, and the middle plane part that leaves, when screwing nut 3, the contact part resistance of arch 22 and backing ring 2 can diminish, saves time and strength, convenient to use.

As shown in fig. 2-3 and 5, further, the bolt 1 includes a head 11, the screw 12 includes a rod 121 having one end connected perpendicularly to the head 11 and a threaded rod 122 axially connected to the other end of the rod 121, and the nut 3 is connected to the threaded rod 122. Threaded rod 122 has external threads thereon and connecting rod 121 has no threads thereon. Preferably, head 11, rod 121 and threaded rod 122 are of unitary construction.

Furthermore, the outer diameter of the connecting rod 121 is larger than the outer diameter of the threaded rod 122, a plurality of axially extending limiting grooves 1211 are arranged on the end face of the connecting rod 121 connected with the threaded rod 122 along the circumferential direction, the side face of each limiting groove 1211 is provided with an opening, so that the backing ring 2 is conveniently sleeved on the connecting rod 121 and is matched with the limiting grooves 1211 for limiting, a plurality of radially inward extending lugs 25 are arranged on the inner wall of the inner hole 24 of the backing ring corresponding to the limiting grooves 1211, the lugs 25 are rectangular, the lugs 25 are slidably connected with the limiting grooves 1211, when the lugs 25 on the backing ring 2 are clamped in the limiting grooves 1211 on the connecting rod 121, the backing ring 2 can be limited from rotating axially around the bolt 1, so that in the process of locking the nut 3, the backing ring 2 only moves linearly along the direction of the limiting grooves 1211 (the axial direction of the bolt 1) and cannot rotate axially around the bolt 1, the surface of the clamped workpiece 4, which is contacted with the backing ring 2, cannot, has a protective effect on the workpiece 4 and has a good effect.

As shown in fig. 6 to 9, in particular, the nut 3 includes a nut body 31, a protruding ring 32 extending radially outward is disposed at an inner end (an end close to the backing ring 2 or the workpiece 4) of the nut 3, a slot 33 is disposed on the protruding ring 32, an inner end surface 34 of the nut 3 is an inward concave arc surface, and an annular groove 35 for accommodating the connecting rod 121 is disposed at the inner end surface of the nut 3. When the workpiece 4 is locked, the annular groove 35 can be used for sleeving the annular groove 35 on the connecting rod 121 so that the nut 3 can partially stretch into and be sleeved on the connecting rod 121 under the condition that the height of the workpiece 4 is smaller or the length of the connecting rod 121 is larger so that the part of the connecting rod 121 extending out of the workpiece 4 is more, and the nut inner hole 36 is provided with an inner thread. In specific use, the length of the connecting rod 121 or the bolt 1 can be adjusted according to the height of the workpiece 4, and the appropriate size and number of gaskets can be added for adaptive adjustment. The end face with the clamping groove 33 on the nut 3 is an inward concave arc-shaped face, so that the nut 3 has a certain (spring steel) elastic deformation adjusting space when being locked, and is convenient to use.

As shown in fig. 4, 5, and 9, further, the backing ring 2 is a circular ring-shaped backing ring body 21, the outer end surface 23 of the backing ring 2 is an inward-concave arc surface, the inner end surface edge of the backing ring 2 is provided with a radially inward annular groove 26, the thickness of the backing ring 2 is small, usually only a few millimeters, and the arc surface and the annular groove 26 on the backing ring 2 enable the backing ring 2 to have a certain (spring steel) elastic deformation adjustment space when being locked with the nut 3, which is convenient for use.

As shown in fig. 5 to 6, boundary lines of the protrusions 22 on the backing ring 2 and the catching grooves 33 on the nut 3 extend through respective axial center lines in the radial direction of the backing ring 2 or the nut 3, thereby forming a fan-shaped structure that diverges radially outward.

Preferably, the nut 3 and the grommet 2 are made of spring steel. Nut 3 and backing ring 2 can have better intensity and elastic deformation's ability, and spring steel is when the atress, and its tension absorption effect is better, and flexible space is great. The materials may also be selected according to customer requirements.

In a specific use, the ideal use state is the state as shown in fig. 1, the workpiece 4 is sleeved on the connecting rod 121 and is located between the head 11 of the bolt 1 and the backing ring 2, the backing ring 2 is sleeved on the connecting rod 121 at the position of the portion with the limiting groove 1211, the contact surface of the backing ring 2 and the nut 3 is located at the threaded rod 122 portion, and when the nut 3 is screwed in, the backing ring 2 does not rotate and only moves linearly along the axial direction of the bolt 1 within the range of the limiting groove 1211.

The above embodiments and drawings are only for illustrating the technical solutions of the present invention and do not constitute limitations of the present invention. It should be noted that, a person skilled in the art may modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for part or all of the technical features, and such modifications or substitutions are included in the scope of the present invention as claimed in the claims.

Claims

1. The utility model provides a bolt-up subassembly that locking takes off which characterized in that: including the bolt, locate screw rod on the bolt, be located by locking work piece outer pot head at backing ring on the screw rod, be located backing ring outer end threaded connection be in nut on the screw rod, the outer terminal surface of backing ring is equipped with a plurality of archs along the circumferencial direction, the terminal surface is equipped with a plurality ofly along the circumferencial direction in the nut with protruding matched draw-in groove, work as when the work piece is locked, protruding with the draw-in groove joint.

2. The anti-loosening bolt-fastening assembly according to claim 1, wherein: the protrusion is triangular, and the clamping groove is an inverted triangle matched with the triangle.

3. The anti-loosening bolt-fastening assembly according to claim 2, wherein: the slopes of the two slopes of the triangle and the inverted triangle are changed from small to big along the thread rotating direction of the screw rod.

4. The anti-loosening bolt-fastening assembly according to claim 3, wherein: the bulges on the backing ring and the clamping grooves on the nut are uniformly arranged along the circumferential direction of the backing ring or the nut, and the number of the bulges is consistent with that of the clamping grooves.

5. The anti-loosening bolt-fastening assembly according to claim 3, wherein: the protrusions on the backing ring and the clamping grooves on the nut are uniformly arranged along the circumferential direction of the backing ring or the nut, and the number of the clamping grooves is two times or more than two times of the number of the protrusions.

6. The anti-loosening bolt-fastening assembly according to claim 1, wherein: the bolt comprises a head, the screw rod comprises a connecting rod and a threaded rod, one end of the connecting rod is vertically connected with the head, the threaded rod is axially connected with the other end of the connecting rod, and the nut is connected onto the threaded rod.

7. The anti-loosening bolt-fastening assembly according to claim 6, wherein: the external diameter of connecting rod is greater than the external diameter of threaded rod, the connecting rod with be equipped with a plurality of spacing grooves along axial extension on the terminal surface that the threaded rod is connected along the circumferencial direction, the side of spacing groove has the opening.

8. The anti-loosening bolt-fastening assembly according to claim 7, wherein: and a plurality of lugs extending radially inwards are arranged on the inner wall of the inner hole of the backing ring at positions corresponding to the limiting grooves, and the lugs are in sliding connection with the limiting grooves.

9. The anti-loosening bolt-fastening assembly according to claim 8, wherein: the inner end of the nut is provided with a convex ring, the clamping groove is formed in the convex ring, the inner end face of the nut and the outer end face of the backing ring are both inwards concave arc-shaped faces, and the inner end face of the nut is provided with an annular groove for accommodating the connecting rod.

10. The anti-loosening bolt-fastening assembly according to claim 1, wherein: the nut and the backing ring are made of spring steel.