CN221033566U

CN221033566U - Anti-drop fastener

Info

Publication number: CN221033566U
Application number: CN202322564189.4U
Authority: CN
Inventors: 赵加恩
Original assignee: Zhejiang Fuerjia Machinery Co ltd
Current assignee: Zhejiang Fuerjia Machinery Co ltd
Priority date: 2023-09-21
Filing date: 2023-09-21
Publication date: 2024-05-28
Anticipated expiration: 2033-09-21

Abstract

The utility model provides an anti-drop fastener which comprises a bolt body, wherein the bolt body comprises a screw head and a screw rod, a first nut is connected to the screw rod in a threaded manner, a rotating block is symmetrically and fixedly arranged at one end of the first nut far away from the screw head, and a limiting piece for limiting the rotation of the locked first nut is arranged on the first nut.

Description

Anti-drop fastener

Technical Field

The utility model relates to the technical field of fasteners, in particular to an anti-falling fastener.

Background

The fastener is a component widely applied to the engineering and manufacturing fields and is used for connecting two or more objects together to ensure the stability and reliability of a structure, and most of the existing fasteners adopt a combination of bolts and nuts, and the threads are designed to provide a reliable connection and can bear static and dynamic loads, however, in the practical process of the fastener, vibration generated outside is extremely easy to cause the bolts or nuts to rotate and loose.

The chinese patent with publication number CN218118267U discloses a locking bolt fastener, which limits the rotation of the locked bolt head by setting a fastening block, a threaded rod and a limiting block, and in this way, the bolt head can be limited to rotate, but a plurality of parts are needed to cooperate to limit the bolt head, and the operation process is complicated.

Disclosure of utility model

Aiming at the defects in the prior art, the utility model provides an anti-falling fastener, which solves the problems that in the prior art, a plurality of parts are needed to be matched for limiting the rotation of a screw head in order to prevent the fastener from loosening with a locked object, and the operation process is too complicated.

According to the embodiment of the utility model, the anti-falling fastener comprises a bolt body, wherein the bolt body comprises a screw head and a screw rod, a first nut is connected to the screw rod in a threaded manner, a rotating block is symmetrically and fixedly arranged at one end, far away from the screw head, of the first nut, and a limiting piece for limiting the rotation of the locked first nut is arranged on the first nut.

Compared with the prior art, the utility model has the following beneficial effects: through adopting screw rod and first nut cooperation to fasten the object that will fasten, the turning block convenient to use person twists first nut, twists first nut and carries out spacingly through the locating part to first nut after putting in place, makes first nut unable rotation to avoided this fastener to take place the gyration under long-term vibration environment first nut or screw rod and lead to appearing the phenomenon that loosens under the long-term vibration environment, overall structure is simple, labour saving and time saving during the use.

Further, the stopper includes: at least one through hole is arranged on the side wall of the first nut, and an expansion screw is arranged in each through hole.

As another embodiment, the stopper includes: at least one threaded hole is formed in the side wall of the first nut, each threaded hole is connected with a limiting column in a threaded mode, and one end, facing the screw head, of each limiting column is provided with anti-skid threads.

Further, the nut comprises a rubber pad which is fixedly arranged on one side of the first nut, which faces the screw head.

Further, the bottom of the screw head is provided with a plurality of strip-shaped cutting edges, and the strip-shaped cutting edges are provided with inclined planes towards the screwing direction of the bolts.

Further, the outer surfaces of the screw and the first nut are coated with a locking coating.

Further, the screw rod is further provided with a second nut which is in threaded connection with the screw rod.

Furthermore, one side of the second nut facing the first nut is provided with a conical part, and the first nut and the two rotating blocks enclose a groove for embedding the second nut.

Drawings

Fig. 1 is an overall structural diagram of an embodiment of the present utility model.

Fig. 2 is a schematic view of a strip-shaped blade structure according to an embodiment of the present utility model.

Fig. 3 is a schematic view of the whole structure of the second nut according to the embodiment of the present utility model.

In the above figures: 1. a screw head; 2. a screw; 3. a first nut; 4. a rotating block; 5. a limiting piece; 6. a strip-shaped cutting edge; 7. and a second nut.

Detailed Description

The technical scheme of the utility model is further described below with reference to the accompanying drawings and examples.

As shown in fig. 1-2, an embodiment of the utility model provides an anti-falling fastener, which comprises a bolt body, wherein the bolt body comprises a screw head 1 and a screw rod 2, a first nut 3 is connected to the screw rod 2 in a threaded manner, one end of the first nut 3, which is far away from the screw head 1, is symmetrically and fixedly provided with a rotating block 4, and a limiting piece 5 for limiting the rotation of the locked first nut 3 is arranged on the first nut 3. When the screw bolt is used, the screw rod 2 of the bolt body is arranged on a locked object in a penetrating way, the first nut 3 is screwed, the first nut 3 and the bolt body are used for locking an object to be locked, the first nut 3 can be conveniently rotated by pinching the two rotating blocks 4 when being screwed, after the first nut 3 is screwed in place, the first nut 3 and the locked object are limited to rotate relatively through the limiting piece 5, and therefore the fastening quality of the fastener to the locked object is guaranteed.

As shown in fig. 1-2, further, the stopper 5 includes: at least one through hole is arranged on the side wall of the first nut 3, and an expansion screw is arranged in each through hole. After the bolt body is matched with the first nut 3 to lock an object, the expansion screw is nailed into the locked object, so that the first nut 3 is limited to rotate.

As another embodiment, as shown in fig. 1-2, the stopper 5 includes: at least one threaded hole is formed in the side wall of the first nut 3, each threaded hole is connected with a limiting column in a threaded mode, and anti-skid threads are formed in one end, facing the screw head 1, of each limiting column. After the bolt body is matched with the first nut 3 to lock an object, the limit post is screwed, so that the limit post is screwed into the threaded hole, one end of the limit post with anti-slip patterns is abutted against the locked object, the first nut 3 is limited to rotate during vibration, and the friction between the first nut 3 and the locked object is indirectly increased.

Further, still include the cushion, the fixed setting of cushion is in the one side of first nut 3 towards spiral shell head 1. The cushion can rely on self elasticity to fill the clearance between first nut 3 and the locked object, makes the bolt of screwing up tighter with the screw tooth laminating of screw rod 2, and the cushion can also absorb the vibration that this fastener during operation produced, reduces the vibration.

As shown in fig. 2 and 3, further, the bottom of the screw head 1 is provided with a plurality of strip-shaped cutting edges 6, and the strip-shaped cutting edges 6 are provided with inclined planes towards the screwing direction of the bolts. In this embodiment, when a relatively soft object (such as a wood object) is locked, the screw head 1 is screwed, and the end with the inclined plane of the screw head 1 rotates to cut the object, so that the screw head is embedded into the locked object, the cut groove of the locked object can shrink in a small range after the screwing is stopped, and when the fastener is vibrated to rotate, the cut groove on the locked object can limit the rotation movement of the strip-shaped cutting edge 6, thereby limiting the rotation of the whole bolt body and achieving the purpose of preventing falling.

Further, the outer surfaces of the screw 2 and the first nut 3 are coated with a release coating. In the embodiment, the anti-loosening coating is zinc-based coating, and the zinc-based coating has excellent corrosion resistance and wear resistance, so that the service life of the fastener is greatly prolonged, and the fastener can be used for effectively fastening objects for a long time.

As shown in fig. 1-3, further comprises a second nut 7, said second nut 7 being in threaded connection with the screw 2. In this embodiment, when the first nut 3 is in a tightened state, one side of the first nut 3 is tightly attached to an object to be locked, the other side of the first nut 3 is tightly attached to the second nut 7, and the first nut 3 is further restricted from falling off due to vibration generated during operation by the double-nut structure of the first nut 3 and the second nut 7.

As shown in fig. 1-3, further, the side of the second nut 7 facing the first nut 3 has a conical portion, and the first nut 3 and the two rotating blocks 4 enclose a recess into which the second nut 7 is inserted. In this embodiment, the side of the rotating block 4 facing the center of the first nut 3 has an arc surface, when an object is fastened, the first nut 3 is rotated, and when the side wall of the first nut 3 is tightly attached to the side wall of the second nut 7, the second nut 7 can be embedded into the groove surrounded by the first nut 3 and the two rotating blocks 4, so that the space occupied when the double-nut structure is adopted is reduced.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.

Claims

1. An anti-drop fastener, characterized in that: including the bolt body, the bolt body includes screw head (1) and screw rod (2), threaded connection has first nut (3) on screw rod (2), the one end symmetry that screw head (1) was kept away from to first nut (3) is equipped with turning block (4) and fixedly, has offered on first nut (3) restriction locking good first nut (3) gyration locating part (5).

2. An anti-slip fastener according to claim 1, characterized in that the stop (5) comprises: at least one through hole is arranged on the side wall of the first nut (3), and an expansion screw is arranged in each through hole.

3. An anti-slip fastener according to claim 1, characterized in that the stop (5) comprises: at least one threaded hole is formed in the side wall of the first nut (3), each threaded hole is internally provided with a limit column in a threaded connection mode, and one end of each limit column, facing the screw head (1), is provided with anti-slip threads.

4. An anti-slip fastener as claimed in claim 1 wherein: the nut is characterized by further comprising a rubber pad, wherein the rubber pad is fixedly arranged on one side, facing the screw head (1), of the first nut (3).

5. An anti-slip fastener as claimed in claim 1 wherein: the bottom of the screw head (1) is provided with a plurality of strip-shaped cutting edges (6), and the strip-shaped cutting edges (6) are provided with inclined planes towards the screwing direction of the bolts.

6. An anti-slip fastener as claimed in claim 1 wherein: the outer surfaces of the screw rod (2) and the first nut (3) are coated with anti-loose coatings.

7. An anti-slip fastener as claimed in claim 1 wherein: the novel screw rod further comprises a second nut (7), and the second nut (7) is in threaded connection with the screw rod (2).

8. An anti-slip fastener as defined in claim 7, wherein: one side of the second nut (7) facing the first nut (3) is provided with a conical part, and the first nut (3) and the two rotating blocks (4) enclose a groove into which the second nut (7) is embedded.