CN215058714U

CN215058714U - Anti-loosening screw

Info

Publication number: CN215058714U
Application number: CN202121607625.6U
Authority: CN
Inventors: 范广森; 杨健; 易锋; 吴挺
Original assignee: Nanjing Sanfang Chemical Equipment Supervision Co ltd
Current assignee: Nanjing Sanfang Chemical Equipment Supervision Co ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2021-12-07
Anticipated expiration: 2031-07-14

Abstract

The utility model provides a screw for preventing loosening, which relates to the field of expansion screws, wherein the screw comprises an expansion pipe, a screw rod and a nut; the expansion pipe is in a hollow tubular shape, external threads are arranged on the outer portion of the expansion pipe, internal threads are arranged on the inner wall of the expansion pipe, and the screw rod penetrates through the expansion pipe and is in threaded connection with the expansion pipe; a plurality of inclined grooves are arranged at the tail end of the expansion pipe at intervals, the axes of the inclined grooves are parallel to the axis of the screw rod, the inclined grooves penetrate through the pipe wall of the expansion pipe, the cross sections of the inclined grooves are triangular, and the tail ends of the inclined grooves are open; a plurality of wedge-shaped pins are arranged at the rear part of the screw at intervals, the wedge-shaped pins are triangular prism-shaped, and the cross sectional area of the wedge-shaped pins is gradually reduced from the rear part of the screw to the front part; the wedge-shaped pins can be inserted into the inclined grooves; the nut is screwed on the outer end of the screw rod. The utility model discloses simple structure, the fastening is effectual.

Description

Anti-loosening screw

Technical Field

The utility model belongs to the technical field of the inflation screw and specifically relates to a prevent not hard up screw.

Background

Some threaded components are installed and, in order to prevent loosening during use, are tapped by drilling small holes in the boundary, the locking screw is screwed in, and the outlet edge is punched to prevent the locking screw from withdrawing. However, sometimes, the heights of the two sides of the boundary of the driving part of the locking screw are different, so that the punching effect of the sample is very poor, the sample punching is performed by hands of workers, and when the number of the sample punching is large, the deformation of some sample punching is not enough to fix the locking screw.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a prevent not hard up screw to solve the current unstable problem of fix with screw.

The utility model discloses a realize like this: a screw capable of preventing loosening comprises an expansion pipe, a screw rod and a nut; the expansion pipe is in a hollow tubular shape, external threads are arranged on the outer portion of the expansion pipe, internal threads are arranged on the inner wall of the expansion pipe, and the screw rod penetrates through the expansion pipe and is in threaded connection with the expansion pipe;

a plurality of inclined grooves are arranged at the tail end of the expansion pipe at intervals, the axes of the inclined grooves are parallel to the axis of the screw rod, the inclined grooves penetrate through the pipe wall of the expansion pipe, the cross sections of the inclined grooves are triangular, and the tail ends of the inclined grooves are open; a plurality of wedge-shaped pins are arranged at the rear part of the screw at intervals, the wedge-shaped pins are triangular prism-shaped, and the cross sectional area of the wedge-shaped pins is gradually reduced from the rear part of the screw to the front part; the wedge-shaped pins can be inserted into the inclined grooves;

the nut is screwed on the outer end of the screw rod.

Preferably, the screw thread direction of the screw is the same as the thread direction on the outer wall of the expansion pipe.

Preferably, a circular hollow hole is formed at the top of each chute.

Preferably, the number of the inclined grooves is the same as the number of the wedge pins.

Preferably, the number of the inclined grooves and the wedge-shaped pins is 4.

Preferably, the end of the screw is provided with a pointed cone shape.

Preferably, the wedge-shaped pins have the same height as the outer surface of the expansion pipe.

Adopt above-mentioned technical scheme, the utility model discloses simple structure, it is effectual to fasten.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1-expansion pipe, 2-screw rod, 3-nut, 4-chute, 5-wedge-shaped base pin, 6-circular hollowed hole.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in figure 1, the utility model provides a prevent not hard up screw, including expansion pipe 1, screw rod 2 and nut 3. The expansion pipe 1 is in a hollow pipe shape, external threads are arranged outside the expansion pipe 1, internal threads are arranged on the inner wall of the expansion pipe 1, and the screw rod 2 penetrates through the expansion pipe 1 and is in threaded connection with the expansion pipe 1. When the expansion pipe is installed, the screw rod 2 penetrates from the tail end of the expansion pipe 1 and is in threaded connection, and the tail end of the screw rod 2 is arranged to be in a taper shape.

The utility model discloses be provided with a plurality of chutes 4 at the terminal interval of expansion pipe 1, the axis of chute 4 is parallel with the axis of screw rod 2, and chute 4 runs through the pipe wall of expansion pipe 1. Preferably, the cross section of the chute 4 is triangular, and the end of the chute 4 is open. A plurality of wedge-shaped pins 5 are arranged at intervals at the rear part of the screw rod 2, the wedge-shaped pins 5 are triangular prism-shaped, and the cross sectional area of the wedge-shaped pins 5 is gradually reduced from the rear part of the screw rod 2 to the front; the wedge-shaped pins 5 can be inserted into the inclined slots 4.

The utility model discloses a nut 3 revolves soon in the outer end of screw rod 2. Preferably, the screw 2 has the same thread direction as the thread direction on the outer wall of the expansion pipe 1.

Furthermore, a circular hollow hole 6 is formed in the top of each chute 4, and when the tail end of the expansion pipe 1 is stressed to expand, the circular hollow holes 6 can guarantee that each expanded part is evenly stressed, so that the expansion screw can be expanded in each direction of the wall surface, and the fixing effect of the expansion screw is improved.

Further, the number of the inclined grooves 4 is the same as the number of the wedge pins 5. The number of the inclined grooves and the wedge-shaped pins is 4.

When the expansion pipe is used, the screw is screwed into the expansion pipe 1, the length of the screw 2 is larger than that of the expansion pipe, and the maximum screwing position of the screw is the position where the wedge-shaped pin is just clamped into the inclined groove because the height of the wedge-shaped pin is the same as that of the outer surface of the expansion pipe, so that the expansion pipe cannot deform. And (4) drilling a fixing hole on the wall, and screwing the screw rod and the expansion sleeve into the fixing hole integrally to realize primary fixing. And continuously screwing the screw rod, wherein the screw rod and the expansion pipe move relatively at the moment, and the wedge-shaped plug pins continuously extrude the chute upwards, so that the tail end of the expansion pipe is expanded by stress and inserted into the hole wall until the screw rod cannot move. And then fixing the object to be fixed on the screw rod through the nut.

The utility model discloses simple structure, the fastening is effectual.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the embodiments of the present invention.

Claims

1. A screw capable of preventing loosening is characterized by comprising an expansion pipe, a screw rod and a nut; the expansion pipe is in a hollow tubular shape, external threads are arranged on the outer portion of the expansion pipe, internal threads are arranged on the inner wall of the expansion pipe, and the screw rod penetrates through the expansion pipe and is in threaded connection with the expansion pipe;

a plurality of inclined grooves are arranged at the tail end of the expansion pipe at intervals, the axes of the inclined grooves are parallel to the axis of the screw rod, the inclined grooves penetrate through the pipe wall of the expansion pipe, the cross sections of the inclined grooves are triangular, and the tail ends of the inclined grooves are open; a plurality of wedge-shaped pins are arranged at the rear part of the screw at intervals, the wedge-shaped pins are triangular prism-shaped, and the cross sectional area of the wedge-shaped pins is gradually reduced from the rear part of the screw to the front part; the wedge-shaped pins can be inserted into the inclined grooves; the nut is screwed on the outer end of the screw rod.

2. A loosening prevention screw as claimed in claim 1, wherein the screw shaft has a thread direction identical to that of the outer wall of the expansion tube.

3. A screw for preventing loosening according to claim 1 wherein a circular hollowed out hole is provided in the top of each slot.

4. A loosening prevention screw as claimed in claim 1, wherein the number of the tapered slots is the same as the number of the wedge shaped prongs.

5. A loosening prevention screw as claimed in claim 4, wherein the number of the tapered slots and the wedge shaped prongs is 4.

6. The anti-loosening screw according to claim 1, wherein the distal end of the shank is tapered.

7. The anti-loosening screw as claimed in claim 1, wherein the wedge shaped prongs have a height equal to the height of the outer surface of the expansion tube.