CN213776027U

CN213776027U - End face anti-theft bolt

Info

Publication number: CN213776027U
Application number: CN202020618873.XU
Authority: CN
Inventors: 何天麟
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2021-07-23
Anticipated expiration: 2030-04-23

Abstract

The utility model discloses an end face anti-theft bolt, which consists of a bolt body and balls, wherein 1 to 3 arc one-way acting grooves which rotate around the periphery of the root of a screw rod at the same distance are arranged on the acting end face of the bolt head of the bolt body, which is connected with the bolt head around the screw rod, the bottom of the arc unidirectional forcing groove is the same as the radius arc bottom of the ball, the arc unidirectional forcing groove is provided with a slope surface which goes from shallow to deep along the screwing direction of the screw thread, the deep end of the ball bearing can accommodate the ball bearing and the height is smaller than the diameter of the ball bearing, the shallow end is a groove connected with the acting end face, the ball is a steel ball with hardness, so that the problem that a fastening bolt arranged on equipment is easily disassembled is solved, the situation that a backstop device is arranged on the thread of a screw rod in the prior art is avoided, the diameter of the screw is thinned due to the fact that the screw is opened and the belly is broken, and the mechanical performance and the strength of the screw are weakened.

Description

End face anti-theft bolt

Technical Field

The invention relates to a mechanical fastener, in particular to a non-detachable end face anti-theft bolt.

Background

The invention is a practical patent applied for 3, month and 13 days in 2009, and the patent name is; rolling pin type anti-theft bolt patent number; ZL 200920035555.4 is improved, researched and innovated to form an end face anti-theft bolt on the basis of obtaining a patent certificate in 1 month and 29 days 2010.

Disclosure of Invention

The invention relates to a one-time shaping batch production process requirement for a cold heading high-speed bolt machine, which arranges a ball on the forced end surface of a bolt head, and manufactures an end surface anti-theft bolt like a standard bolt to improve the production benefit.

The technical problem to be solved is as follows:

the anti-theft bolt is provided with the retaining roller needles, and the screw is subjected to rifling and belly breaking, so that the diameter of the screw is thinned, the mechanical strength of the screw is weakened, and the tightening torque of the bolt is reduced.

The technical scheme is as follows:

end face theftproof bolt, its characterized in that: the bolt is composed of a bolt body and balls, 1-3 arc unidirectional force exerting grooves which rotate around the periphery of the root of a screw rod at the same distance are arranged on a force exerting end face, connected with the bolt head, of the bolt head of the bolt body, the groove bottoms of the arc unidirectional force exerting grooves are identical to the radius arc bottoms of the balls, each arc unidirectional force exerting groove is provided with a slope face which goes from shallow to deep along a thread screwing-in direction, the deep end of each arc unidirectional force exerting groove can accommodate the balls and is smaller than the diameter of the balls in height, the shallow end of each arc unidirectional force exerting groove is a groove connected with the force exerting end face, and the balls are steel balls with hardness.

Assembly characteristics: the ball is adhered to the plane of the end face retaining bolt head through the butter and is fixed in the one-way force applying groove, the ball is convenient to transport, carry and install, the ball is prevented from falling off, the ball can be sealed through the adhesion of the paper ring, and the installation and the retaining function cannot be influenced.

Installation characteristics: the screw rod of the end face anti-theft bolt is inserted into the mounting hole of the connected object, the threaded hole of the connected object is screwed in, when the end face of the connected object is screwed close to the end face of the connected object, the threaded hole is screwed in by the wrench until the surface of the connected object is extruded with the print at the top end of the ball, the anti-skidding effect is achieved, and the mounting effect that the forced end face of the bolt head is tightly leaned against the surface of the connected object is achieved.

The working principle is as follows: because the bottom of the arc-shaped unidirectional acting groove is a slope surface from shallow to deep along the screwing direction of the screw thread, the ball is gradually lifted along the slope surface of the groove bottom under the pushing of reverse screw force, the inner screw thread and the outer screw thread are meshed with the stress slope surface and are mutually extruded and matched with the screw threads for single-sided interference to form unidirectional braking power, and the lifting distance of the ball is in direct proportion to the anti-disassembly torque.

The invention has the beneficial effects that: the anti-unloading ball retaining device is far away from the screw and arranged on the forced end face of the bolt, the mechanical strength of the screw is not affected, the high-speed cold heading bolt machine is convenient, the requirements of one-step molding batch production process and high-speed production speed are met, and the manufacturing cost is reduced.

Drawings

FIG. 1 is a front view of an end face anti-theft bolt

FIG. 2 is a sectional view of the end face anti-theft bolt A-A

FIG. 3 is a left side view of the anti-theft bolt with end face

FIG. 4 is a front view of the screw thread stress analysis of the anti-theft bolt on the installation end face

FIG. 5 is a force analysis diagram of the fit thread of the anti-theft bolt on the installation end face

FIG. 6 is a front view of the interference of the screw thread for the anti-theft bolt with detachable end face

FIG. 7 is an interference analysis diagram of the screw thread fit of the anti-theft bolt with the disassembled end face

In FIGS. 1 to 7

1: a bolt body;

2: a ball bearing;

3: an attached object;

4: an object is attached.

Detailed Description

The invention is described in detail below with reference to the accompanying drawings:

example 1:

as shown in the assembly characteristics of figure 1, figure 2 and figure 3, the ball 2 is adhered in the arc-shaped one-way acting groove of the bolt body 1 in advance by butter for fixing, the transportation, carrying and installation are convenient, the ball 2 is prevented from falling off, the ball 2 can be covered by a paper ring in an adhering way, and the installation and stopping functions can not be influenced.

Example 2:

mounting features as shown in fig. 4 and 5: the screw rod of the end face anti-theft bolt is inserted into the mounting hole of the connected object 3, then the threaded hole of the connected object 4 is screwed in, when the end face of the connected object 3 is screwed close to, the end face anti-theft bolt is screwed by a wrench until the surface of the connected object 3 is extruded out of the print at the top end of the ball 2, the anti-skidding effect is achieved, and the mounting effect that the force application end face of the bolt head is tightly leaned against the surface of the connected object is achieved.

Example 3:

the working principle shown in fig. 6 and 7 is as follows: because the bottom of the arc-shaped unidirectional acting groove is a slope surface gradually deepened from shallow along the screwing-in direction of the screw thread, the ball 2 is gradually raised along the groove bottom under the pushing of reverse screw force, the inner screw thread and the outer screw thread are meshed with the stress slope and are mutually extruded and matched with the screw threads for single-sided interference to form unidirectional braking power, and the raising distance of the ball is in direct proportion to the anti-disassembly torque.

The above examples do not limit the invention in any way, and all technical solutions obtained by means of equivalent substitution or equivalent transformation fall within the scope of protection of the invention.

Claims

1. End face theftproof bolt, its characterized in that: the bolt is composed of a bolt body and balls, 1-3 arc unidirectional force exerting grooves which rotate around the periphery of the root of a screw rod at the same distance are arranged on a force exerting end face, connected with the bolt head, of the bolt head of the bolt body, the groove bottoms of the arc unidirectional force exerting grooves are identical to the radius arc bottoms of the balls, each arc unidirectional force exerting groove is provided with a slope face which goes from shallow to deep along a thread screwing-in direction, the deep end of each arc unidirectional force exerting groove can accommodate the balls and is smaller than the diameter of the balls in height, the shallow end of each arc unidirectional force exerting groove is a groove connected with the force exerting end face, and the balls are steel balls with hardness.