CN213808392U

CN213808392U - Anti-drop bolt

Info

Publication number: CN213808392U
Application number: CN202022676172.4U
Authority: CN
Inventors: 孟召文
Original assignee: Yangzhou Sanzhe Fastener Co ltd
Current assignee: Yangzhou Sanzhe Fastener Co ltd
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-07-27
Anticipated expiration: 2030-11-18

Abstract

The utility model discloses an anti-drop bolt, which relates to the technical field of bolts and comprises a screw rod and a bolt head arranged at one end of the screw rod, wherein the screw rod is in threaded connection with a nut, a thread groove is axially arranged at the center of one end face of the screw rod, which is far away from the bolt head, an elongated slot is arranged on the outer wall of one end of the screw rod, which is far away from the bolt head, along the length direction, and the elongated slot is communicated with the inner cavity of the thread groove; the one end that the bolt head was kept away from to the screw rod is connected with and is used for strutting this end so that the piece that struts of this end external diameter grow, strut the piece include with thread groove threaded connection's screw thread post and set up in the preforming of screw thread post one end, the diameter of screw thread post is greater than the internal diameter of thread groove, the preforming simultaneously is equipped with the round snap ring, the snap ring sets up in same one side of preforming with the screw thread post, the screw thread post is arranged in the snap ring inner circle, be equipped with on the terminal surface that the bolt head was kept away from to the screw rod and supply snap ring male annular. The utility model discloses can effectively solve not hard up problem that causes the bolt to drop between bolt and the nut.

Description

Anti-drop bolt

Technical Field

The utility model relates to a bolt technical field specifically is an anti-drop bolt.

Background

The bolt is a cylindrical threaded fastener matched with a nut, consists of a head part and a screw (a cylinder with an external thread), needs to be matched with the nut and is used for fastening and connecting two parts with through holes, and the connection form is called bolt connection.

In the use process of a common bolt, the phenomenon of loosening between the bolt and the nut often occurs along with the time, so that the bolt falls off, and a plurality of problems are brought to the normal use of the bolt.

Disclosure of Invention

An object of the utility model is to overcome the not enough of above-mentioned technique, provide an anti-drop bolt, can effectively solve between bolt and the nut not hard up problem that causes the bolt to drop.

In order to realize the purpose of the utility model, the utility model adopts the technical scheme that:

an anti-drop bolt comprises a screw rod and a bolt head arranged at one end of the screw rod, wherein a nut is connected to the screw rod in a threaded manner; the one end that the bolt head was kept away from to the screw rod is connected with and is used for strutting this end so that this end external diameter grow strut the piece, strut the piece and include with thread groove threaded connection's screw thread post and set up in the preforming of screw thread post one end, the diameter of screw thread post is greater than the internal diameter of thread groove, the preforming simultaneously is equipped with the round snap ring, the snap ring sets up in same one side of preforming with the screw thread post, and the screw thread post is arranged in the snap ring inner circle, be equipped with on the terminal surface that the bolt head was kept away from to the screw rod and supply snap ring male annular.

The utility model discloses a further improvement lies in, preforming, screw thread post and snap ring are the integrated into one piece structure.

The utility model discloses a further improvement lies in, screw rod and bolt head are integrated into one piece structure.

The utility model discloses a further improvement lies in, is equipped with the cross on the preforming another side relative with the screw thread post and screws up the groove, is convenient for strut the piece and screws up and screw up.

The utility model discloses a further improvement lies in, the preforming is circular preforming, the diameter of preforming equals the screw rod and keeps away from the diameter after a terminal surface of bolt head is propped open, covers the terminal surface of screw rod, and is more pleasing to the eye.

The utility model has the advantages that: the utility model discloses a nut and screw rod threaded connection back, strut the screw rod tip through strutting the piece, can prevent effectively that the nut on the bolt is not hard up, through utilizing snap ring and annular cooperation, can prevent effectively that the piece that struts is not hard up to drop, play fine anti-bolt not hard up effect of droing.

Drawings

Fig. 1 is a schematic structural view of the non-installed spreader of the present invention.

Fig. 2 is a schematic structural view of the present invention.

Fig. 3 is a schematic structural view of one end of the screw rod away from the bolt head.

Fig. 4 is a schematic view of another side of the pressing sheet opposite to the threaded post according to the present invention.

In the figure: the screw comprises a screw rod 1, a bolt head 2, a nut 3, a thread groove 4, an elongated groove 5, a strutting piece 6, a thread column 7, a pressing sheet 8, a clamping ring 9, an annular groove 10 and a cross screwing groove 11.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1-4, an anti-drop bolt includes a screw rod 1 and a bolt head 2 disposed at one end of the screw rod 1, a nut 3 is connected to the screw rod 1 through a thread, a thread groove 4 is axially disposed at a center of an end face of the screw rod 1 away from the bolt head 2, an elongated groove 5 is disposed on an outer wall of one end of the screw rod 1 away from the bolt head 2 along a length direction, the elongated groove 5 is communicated with an inner cavity of the thread groove 4, and the elongated grooves 5 are provided with a plurality of pieces and uniformly distributed along a circumferential direction of the screw rod 1; the one end that bolt head 2 was kept away from to screw rod 1 is connected with and is used for strutting this end so that this end external diameter grow strut 6, strut 6 include with 4 threaded connection's of thread groove screw thread post 7 and set up in the preforming 8 of 7 one ends of thread post, the diameter of screw thread post 7 is greater than the internal diameter of thread groove 4, preforming 8 one side is equipped with round snap ring 9, snap ring 9 sets up in same one side of preforming 8 with screw thread post 7, screw thread post 7 is arranged in snap ring 9 inner circle, be equipped with on the terminal surface that bolt head 2 was kept away from to screw rod 1 and supply snap ring 9 male annular 10.

The pressing sheet 8, the threaded column 7 and the snap ring 9 are of an integrally formed structure.

The screw rod 1 and the bolt head 2 are of an integrally formed structure.

And a cross screwing groove 11 is formed in the other surface of the pressing sheet 8 opposite to the threaded column 7, so that the opening member 6 can be screwed up and screwed down conveniently.

The pressing sheet 8 is a circular pressing sheet, the diameter of the pressing sheet 8 is equal to the diameter of the screw 1 after the end face, far away from the bolt head 2, of the screw is spread, the end face of the screw 1 is covered, and the pressing sheet is more attractive.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.

Claims

1. An anti-drop bolt comprises a screw rod and a bolt head arranged at one end of the screw rod, wherein a nut is connected to the screw rod in a threaded manner; the one end that the bolt head was kept away from to the screw rod is connected with and is used for strutting this end so that this end external diameter grow strut the piece, strut the piece and include with thread groove threaded connection's screw thread post and set up in the preforming of screw thread post one end, the diameter of screw thread post is greater than the internal diameter of thread groove, the preforming simultaneously is equipped with the round snap ring, the snap ring sets up in same one side of preforming with the screw thread post, and the screw thread post is arranged in the snap ring inner circle, be equipped with on the terminal surface that the bolt head was kept away from to the screw rod and supply snap ring male annular.

2. A drop-preventing bolt as defined in claim 1, wherein said pressing piece, threaded post and snap ring are of an integrally formed structure.

3. A drop bolt according to claim 1, wherein the shank and the bolt head are of one-piece construction.

4. A drop-preventing bolt as claimed in claim 1, wherein a cross screw groove is formed on the other surface of the pressing piece opposite to the screw post.

5. A drop-preventing bolt according to claim 1, wherein said pressing piece is a circular pressing piece having a diameter equal to a diameter of the screw after an end surface of the screw remote from the bolt head is spread.