CN219975103U

CN219975103U - Looseness-proof bolt and nut assembly

Info

Publication number: CN219975103U
Application number: CN202223439600.7U
Authority: CN
Inventors: 张大川
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2023-11-07
Anticipated expiration: 2032-12-20

Abstract

The utility model discloses an anti-loosening bolt and nut assembly which comprises a bolt, a nut, a gasket, a nut and a nut, wherein the nut is in threaded connection with a screw rod of the bolt, the gasket is positioned between the nut and the head of the bolt and sleeved on the screw rod, the nut is arranged on the screw rod in a penetrating mode and sleeved on the nut, a first external thread is arranged on the outer circumferential surface of the gasket, an internal thread matched with the external thread is arranged on the nut, when the nut is in threaded connection with the gasket, the end face of the inner wall of the end, far away from the gasket, of the nut is abutted against the nut, the end face of the end, close to the nut, of the gasket is abutted against the nut and locked on the screw rod, a concave portion is further arranged on the side face of the screw rod, far away from the screw rod, of the head of the bolt, and the shape and size of a shaft hole of the gasket are corresponding to the shape and size of the cross section of the screw rod at the concave portion. In the assembly, in the fastening state, the nut and the gasket are mutually restricted, the nut is not easy to loosen, and the fastening effect is good.

Description

Looseness-proof bolt and nut assembly

Technical Field

The utility model relates to the technical field of fastening devices, in particular to an anti-loosening bolt and nut assembly.

Background

In the prior art, the fastening combination formed by the bolts and the nuts is widely applied to various industries in industrial production, and in the prior art, the nuts and the bolts are usually added with flat gaskets and spring pads to increase the fastening effect and prevent the nuts from loosening. The combined structure cannot fundamentally play a role in preventing the nut from loosening, the anti-loosening effect is not good enough, and accidents caused by loosening the nut are more. In many fields of construction, military industry or railroad bridges, the requirement for fasteners is higher and once loosening occurs, the consequences are not envisaged. Therefore, there is a strong need for a fastening assembly that has a good fastening effect and can effectively prevent the nut from being loosened so as to satisfy the needs of users.

Disclosure of Invention

The utility model provides an anti-loosening bolt and nut assembly for solving the problems in the prior art, and solves the problems in the prior art that the bolt and nut assembly is easy to loosen and has poor fastening effect.

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

the utility model provides a but anti-loosening's bolt, nut subassembly, is in including bolt, threaded connection nut on the screw rod of bolt, be located between nut and the bolt head and the cover is located gasket on the screw rod, wear to locate on the screw rod and the cover is located nut on the nut, be equipped with first external screw thread on the outer circumference surface of gasket, be equipped with on the nut with external screw thread matched's internal screw thread, works as nut and gasket threaded connection, the nut is kept away from the inner wall terminal surface and the nut butt of gasket one end, the terminal surface and the nut butt that the gasket is close to nut one end will the nut is locked on the screw rod, keep away from at the screw rod still be equipped with the depressed part on the side of screw rod of bolt head one end department screw rod, the shaft hole shape size of gasket with the shape size of depressed part department screw rod cross section corresponds.

The surface of the concave part is a plane which is parallel to the axis of the screw rod.

The screw rod of bolt is equipped with the second external screw thread, and the trend of second external screw thread is opposite with the trend of first external screw thread on the gasket.

The pitch of the second thread on the screw rod of the bolt is larger than the pitches of the first external thread on the gasket and the internal thread on the nut.

When the nut and the gasket lock the nut on the screw rod, a gap is reserved between the end face of the nut, which is close to one end of the gasket, and the end face of the gasket, which is far away from one end of the nut.

The nut is close to one end of the gasket is provided with an axial hole, the inner diameter of the axial hole is larger than the outer diameter of the nut, the internal thread on the nut is arranged on the circumferential inner wall of the axial hole, one end, far away from the head of the bolt, of the nut is provided with an axial through hole, and the aperture of the axial through hole is larger than the outer diameter of the screw.

The nut is hexagonal in appearance.

The nut is made of an elastic material.

The elastic material is spring steel.

The utility model has the beneficial effects that:

compared with the prior art, the assembly provided by the utility model has the advantages that the nuts are mutually restricted due to the abutting and synchronization of the nuts and the gaskets, and the nuts are not easy to fall off in a fastening state, so that the fastening effect is good.

Drawings

The utility model is described in further detail below with reference to the attached drawing figures, wherein:

fig. 1 is a front view of the present utility model.

Fig. 2 is a cross-sectional view A-A of fig. 1.

Fig. 3 is a front view of the gasket of the present utility model.

Figure details:

1. bolts, 11, bolt heads, 12, screws, 13 and concave parts;

2. the gasket, 21, the shaft hole, 22, the first external screw thread;

3. a nut 31, an axial hole, a 32 axial through hole, 33 and an internal thread;

4. and (3) a nut.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects obtained by the utility model easy to understand, the following describes the specific embodiment of the utility model with reference to the specific drawings.

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

In an embodiment of the present utility model, as shown in fig. 1 to 3, an anti-loosening bolt and nut assembly is provided, which comprises a bolt 1, a nut 4 screwed on a screw 12 of the bolt 1, a gasket 2 positioned between the nut 4 and a bolt head 11 and sleeved on the screw 12, and a nut 3 penetrating through the screw 12 and sleeved on the nut 4, wherein a first external thread 22 is provided on an outer circumferential surface of the gasket 2, an internal thread 33 matched with the first external thread 22 is provided on the nut 3, and when the nut 3 is screwed with the gasket 2, an inner wall end surface of one end of the nut 3, which is far away from the gasket 2, is abutted with the nut 4, and an end surface of the gasket 2, which is close to the end of the nut 4, is abutted with the nut 4 and locks the nut 4 on the screw 12. In order to prevent the gasket 2 from rotating radially on the screw 12, a concave portion 13 is further provided on the side surface of the screw 12 at the end of the screw 12 away from the bolt head 11, the shape and size of the shaft hole 21 of the gasket 2 correspond to the shape and size of the cross section of the screw 12 at the concave portion 13, and the gasket 2 is sleeved on the screw 12 through the shaft hole 21. Thus, when the nut 4 or the nut 3 rotates, the washer 2 does not rotate along the axial direction of the screw 12, and the structural effect of the nut 4 is better.

Preferably, the surface of the recess 13 is a plane, which is parallel to the axis of the screw 12, so as to facilitate processing. As can be seen in fig. 1 and 2, the recess 13 corresponds to a piece cut out on the side of the screw 12, forming an asymmetric structure.

Compared with the prior art, the fastening assembly provided by the utility model has the advantages that the nuts are abutted and synchronous with the gaskets, and the nuts, the gaskets and the fastening assembly are mutually restricted, so that the fastening assembly is not easy to fall off in a fastening state, and the fastening effect is good.

The nut 4 is a standard nut, preferably a hexagon. The bolt 1 is a standard bolt and comprises a bolt head 11 and a screw rod 12, wherein a second external thread on the screw rod 12 is in threaded connection with an internal thread on the nut 4.

When in use, the clamped object is sleeved on the screw rod 12 and is arranged between the bolt head 11 and the gasket 2, and is locked by the nut 4. Through the threaded connection between the nut 3 and the gasket 2 and the abutting connection between the inner wall of the nut 3 and the nut 4, the nut 4 can be further locked on the screw rod 12, the nut 4 is prevented from loosening, and a good anti-loosening effect is achieved.

Further, a second external thread is provided on the shank 12 of the bolt 1, and the direction of the second external thread is opposite to that of the first external thread 22 on the gasket 2. Therefore, when the nut 3 and the nut 4 vibrate at the same frequency, the directions of the threads of the nut 3 and the nut 4 are opposite, the falling-off rotation directions of the nut 4 and the nut 3 are opposite, the abutting nut 4 and the nut 3 are synchronous together, the nut 3 has a resisting action on the looseness of the nut 4, and the nut 3 are mutually restricted, so that the nut 4 cannot fall off easily, and the fastening effect of the nut 4 is good.

Further, the pitch of the second external thread on the shank 12 of the bolt 1 is larger than the pitch of the first external thread on the washer 2 and the pitch of the internal thread 33 on the nut 3. Under the same vibration condition, the looseness of the nut 3 is smaller than that of the nut 4, and the looseness prevention effect of the nut 4 can be improved.

Specifically, when the nut 3 and the washer 2 lock the nut 4 on the screw 12, a gap is formed between the end face of the nut 3 near the end of the washer 2 and the end face of the washer 2 far from the end of the nut 4. The gasket 2 can be always positioned outside the clamped object.

Specifically, the nut 3 is close to one end of the gasket 2 and is provided with an axial opening 31, the inner diameter of the axial opening 31 is larger than the outer diameter of the nut 4, the internal thread on the nut 3 is arranged on the circumferential inner wall of the axial opening 31, one end, far away from the bolt head 11, of the nut 3 is provided with an axial through hole 32, and the aperture of the axial through hole 32 is larger than the outer diameter of the screw 12. In use, the nut 3 is sleeved on the screw 12 and the nut 4 from the end of the screw 12 remote from the bolt head 11.

Preferably, the nut 3 has a hexagonal shape.

Preferably, the nut 3 is made of an elastic material.

Preferably, the elastic material is spring steel. When the spring steel is stressed, the tension absorbing effect is good, and the expansion space is large.

The above embodiments and the drawings are only for illustrating the technical aspects of the present utility model, and are not to be construed as limiting the present utility model. It should be noted that modifications to the embodiments described in the foregoing may be made by those skilled in the art, or equivalents may be substituted for some or all of the features thereof, and such modifications or substitutions should be included in the scope of the claims.

Claims

1. An anti-loosening bolt and nut assembly is characterized in that: including bolt, threaded connection be in nut on the screw rod of bolt, be located between nut and the bolt head and the cover is located gasket on the screw rod, wear to locate on the screw rod and the cover is located nut on the nut, be equipped with first external screw thread on the outer circumference surface of gasket, be equipped with on the nut with the internal screw thread that the external screw thread matches, works as when nut and gasket threaded connection, the nut is kept away from the inner wall terminal surface and the nut butt of gasket one end the terminal surface and the nut butt that the gasket is close to nut one end will the nut locks on the screw rod, keeps away from at the screw rod still be equipped with the depressed part on the side of screw rod of bolt head one end department, the shaft hole shape size of gasket with the shape size of depressed part department screw rod cross section is corresponding.

2. The releasable bolt and nut assembly of claim 1, wherein: the surface of the concave part is a plane which is parallel to the axis of the screw rod.

3. The releasable bolt and nut assembly of claim 1, wherein: the screw rod of bolt is equipped with the second external screw thread, and the trend of second external screw thread is opposite with the trend of first external screw thread on the gasket.

4. The releasable bolt and nut assembly of claim 3, further comprising: the pitch of the second thread on the screw rod of the bolt is larger than the pitches of the first external thread on the gasket and the internal thread on the nut.

5. The releasable bolt and nut assembly of claim 1, wherein: when the nut and the gasket lock the nut on the screw rod, a gap is reserved between the end face of the nut, which is close to one end of the gasket, and the end face of the gasket, which is far away from one end of the nut.

6. The releasable bolt and nut assembly of claim 1, wherein: the nut is close to one end of the gasket is provided with an axial hole, the inner diameter of the axial hole is larger than the outer diameter of the nut, the internal thread on the nut is arranged on the circumferential inner wall of the axial hole, one end, far away from the head of the bolt, of the nut is provided with an axial through hole, and the aperture of the axial through hole is larger than the outer diameter of the screw.

7. The releasable bolt and nut assembly of claim 6, further comprising: the nut is hexagonal in appearance.

8. The releasable bolt and nut assembly of claim 7, further comprising: the nut is made of an elastic material.

9. The releasable bolt and nut assembly of claim 8, further comprising: the elastic material is spring steel.