CN212337867U

CN212337867U - Bolt and nut connecting structure

Info

Publication number: CN212337867U
Application number: CN202021081105.1U
Authority: CN
Inventors: 万文钦; 戴建均; 康远泽
Original assignee: Jianyang Shuxin Locomotive Parts Co ltd
Current assignee: Jianyang Shuxin Locomotive Parts Co ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-01-12
Anticipated expiration: 2030-06-12

Abstract

A bolt and nut connecting structure comprises a bolt and a nut, wherein the bolt comprises a bolt head and a screw rod, a groove for accommodating the nut is formed in the outer end face of the bolt head, a magnet capable of adsorbing the nut is arranged in the groove, an external thread matched with the internal thread of the nut is arranged on the screw rod, an inner hole is formed in the end portion of the screw rod along the central axis of the screw rod, a plurality of openings communicated with the inner hole are formed in the end portion of the screw rod in a mode that the end portion of the screw rod surrounds the inner hole, and an expansion piece is embedded in the inner hole; after the nut is screwed into the screw rod, the expansion piece is pushed into the inner hole, and the end part of the screw rod is slightly cracked and then thickened under the action of the notch because the upper end part of the expansion piece is slightly wider than the diameter of the inner hole, so that the nut cannot exit the screw rod even if loosened, and the safety performance of a product is improved.

Description

Bolt and nut connecting structure

Technical Field

The utility model belongs to the technical field of mechanical fastening, concretely relates to bolt and nut connection structure.

Background

The bolt is a fastener consisting of a bolt head and a screw (a cylinder with external threads) and is used for fastening and connecting two mechanical equipment parts with through holes. Bolts are essential in daily life and in the technical field of sheet metal and machine tool machining. Traditional bolt time has long afterwards because reasons such as corrosion or vibrations of metal surface, and the nut is not hard up often, if do not discover in time to overhaul, leads to connecting insecure or bolt and nut to drop, takes place the incident easily, causes the loss, and bolt and nut are generally separately scattered moreover and are placed, often lose easily and can not pair.

Therefore, the above problems are problems that should be considered and solved in the design and use of the bolt and nut.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims to solve the technical problem that a bolt and nut connection structure is provided.

The technical solution of the utility model is that: the utility model provides a bolt and nut connection structure, includes bolt and nut, the bolt includes bolt head and screw rod, the outer terminal surface of bolt head is equipped with and is used for holding the recess of nut, it is adsorbable to be equipped with in the recess the magnet of nut, be equipped with on the screw rod with the external screw thread of nut internal thread adaptation, the tip of screw rod is equipped with the hole along its central axis, the screw rod tip encircles the hole be equipped with a plurality ofly with the opening of hole intercommunication, it is equipped with the inflation piece to inlay in the hole.

The utility model discloses a further improvement lies in: the groove is matched with the nut in shape, the height of the nut is higher than the diameter of the groove, and the magnet is arranged at the bottom or on the side wall of the groove.

The utility model discloses a further improvement lies in: the expansion piece is narrow at the bottom and wide at the top and is in a conical shape or an inverted trapezoid shape, the outer diameter of the widest part of the expansion piece is larger than the inner diameter of the inner hole, and the narrowest part of the expansion piece is smaller than the inner diameter of the inner hole.

The utility model discloses a further improvement lies in: and an elastic gasket is arranged on the inner end surface of the bolt head.

The utility model discloses a further improvement lies in: the screw hole of nut is equipped with the extension section toward one side extension, be equipped with on the internal perisporium of extension section with the internal thread of external screw thread adaptation on the screw rod.

The utility model discloses a further improvement lies in: the upper end of the expansion piece is provided with a pull ring.

Compared with the prior art, the beneficial effects of the utility model are that: the nut storage rack is simple in structure, the nuts can be placed in the grooves when being stored, the loss rate of the nuts is reduced, the utilization rate of the nuts is improved, and the cost is saved; after the nut is screwed into the screw rod, the expansion piece is pushed into the inner hole, and the upper end part of the expansion piece is slightly wider than the diameter of the inner hole, so that the end part of the screw rod is slightly cracked and then thickened under the action of the notch, the nut cannot exit the screw rod even if loosened, the bolt connection is ensured to be stable and firm, the problem that the bolt is loosened due to the fact that the external disturbance factors generate alternate strain is solved, and the safety performance of a product is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application.

In the drawings:

fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the groove on the outer end face of the middle bolt head of the present invention

Fig. 3 is a schematic view of the connection between the outer end face of the bolt head and the nut in the present invention;

FIG. 4 is a schematic view of the gap in the present invention;

the attached drawings are as follows:

1-nut, 2-bolt head, 3-screw rod, 4-groove, 5-magnet, 6-inner hole, 7-gap, 8-expansion piece, 9-pull ring, 10-elastic gasket and 11-lengthened section.

Detailed Description

Embodiments of the present application will be described in detail with reference to the drawings and examples, so that how to implement technical means to solve technical problems and achieve technical effects of the present application can be fully understood and implemented.

As shown in the figures, the embodiment provides a bolt-nut connection structure, which includes a bolt and a nut 1, the bolt includes a bolt head 2 and a screw rod 3, a groove 4 for accommodating the nut 1 is provided on an outer end surface of the bolt head 2, a magnet 5 capable of adsorbing the nut 1 is provided in the groove 4, the groove 4 is adapted to the shape of the nut 1, the magnets 5 are uniformly distributed and provided at a position corresponding to a bottom of the groove 4 and a contact surface of the nut 1, an external thread adapted to an internal thread of the nut 1 is provided on the screw rod 3, an inner hole 6 is concavely provided on an end portion of the screw rod 3 along a central axis thereof, a plurality of gaps 7 communicating with the inner hole 6 are provided around the inner hole 6 at the end portion of the screw rod 3, a depth of the gaps 7 is not more than half of a diameter of the inner hole 6 to ensure strength of the end portion of the screw rod 3, an expansion piece 8 is embedded in, the expansion piece 8 is narrow at the bottom and wide at the top, and is of a body type, the outer diameter of the widest part of the expansion piece 8 is slightly larger than the inner diameter of the inner hole 6, and the narrowest part is smaller than the inner diameter of the inner hole 6, so that the inner hole 6 is deformed and expanded outwards due to the extrusion of the expansion piece 8, the diameter of the section of the screw rod 3 is wider than the original diameter, the nut 1 is prevented from being withdrawn from the screw rod 3, the pull ring 9 is arranged at the upper end part of the expansion piece 8, when the nut 1 needs to be taken down, the expansion piece 8 is taken out forcibly by using the pull ring 9, then the nut 1 is screwed out by using threads, and the inner end face of the bolt head 4. The screw of nut 1 extends toward one side and is equipped with extension section 11, be equipped with on the internal perisporium of extension section 11 with the internal thread of external screw thread adaptation on the screw rod 3, extension screw thread area of contact further prevents it not hard up, and sets up extension section 11 for extension section 11 protrusion outside recess 4 when nut 1 arranges recess 4 in, conveniently takes out nut 1 from recess 4.

Compared with the prior art, the beneficial effect of this embodiment is: the nut storage rack is simple in structure, the nuts can be placed in the grooves when being stored, the loss rate of the nuts is reduced, the utilization rate of the nuts is improved, and the cost is saved; after the nut is screwed into the screw rod, the expansion piece is pushed into the inner hole, and the upper end part of the expansion piece is slightly wider than the diameter of the inner hole, so that the end part of the screw rod is slightly cracked and then thickened under the action of the notch, the nut cannot exit the screw rod even if loosened, the bolt connection is ensured to be stable and firm, the problem that the bolt is loosened due to the fact that the external disturbance factors generate alternate strain is solved, and the safety performance of a product is improved.

While the foregoing description shows and describes several preferred embodiments of the invention, it is to be understood, as noted above, that the invention is not limited to the forms disclosed herein, but is not intended to be exhaustive or to exclude other embodiments and may be used in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. But that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention, which is to be limited only by the claims appended hereto.

Claims

1. The utility model provides a bolt and nut connection structure which characterized in that: including bolt and nut, the bolt includes bolt head and screw rod, the outer terminal surface of bolt head is equipped with and is used for holding the recess of nut, be equipped with the adsorbability in the recess the magnet of nut, be equipped with on the screw rod with the external screw thread of nut internal thread adaptation, the tip of screw rod is equipped with the hole along its central axis, the screw rod tip encircles the hole be equipped with a plurality ofly with the opening of hole intercommunication, it is equipped with the inflation piece to inlay in the hole.

2. A bolt-nut connecting structure according to claim 1, wherein: the groove is matched with the nut in shape, the height of the nut is higher than the diameter of the groove, and the magnet is arranged at the bottom or on the side wall of the groove.

3. A bolt-nut connecting structure according to claim 1, wherein: the expansion piece is narrow at the bottom and wide at the top and is in a conical shape or an inverted trapezoid shape, the outer diameter of the widest part of the expansion piece is larger than the inner diameter of the inner hole, and the narrowest part of the expansion piece is smaller than the inner diameter of the inner hole.

4. A bolt-nut connecting structure according to claim 1, wherein: and an elastic gasket is arranged on the inner end surface of the bolt head.

5. A bolt-nut connecting structure according to claim 1, wherein: the screw hole of nut is equipped with the extension section toward one side extension, be equipped with on the internal perisporium of extension section with the internal thread of external screw thread adaptation on the screw rod.

6. A bolt-nut connecting structure according to claim 1, wherein: the upper end of the expansion piece is provided with a pull ring.