CN2493772Y

CN2493772Y - Dismounting-resistant screw (bolt) and nut

Info

Publication number: CN2493772Y
Application number: CN 01235275
Authority: CN
Inventors: 曹新光
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-06-06
Filing date: 2001-06-06
Publication date: 2002-05-29
Anticipated expiration: 2011-06-06

Abstract

The utility model relates to a thread connecting piece mainly consisting of a winding head that can be blocked by a screwdriver, a twisting off grip and a thread connecting body. After an anti-disassembly screw (bolt) and nut is screwed by the screwdriver, then the winding head can be forced to be twisted off from the twisting off grip to break away from the connecting body. As the anti-clamping surface on the thread connecting body is designed to be a conical surface or a ball arc surface, the thread connecting body can not be screwed out by screwdrivers like a driver and a spanner any more so as to realize the goal of anti-disassembly. The thread connecting piece is suitable for connection of various establishments needing anti-disassembly.

Description

Tamper-resistant screw (bolt), nut

The utility model relates to a kind of threaded connector, and is especially a kind of by screwing tamper-resistant screw (bolt), the nut that the head and the body that is threaded are formed.

At present, the assembly unit of many objects and fixed installation often all being used and being threaded fixing or the employing welding manner is fixed, this employing standard screws, bolt, some communal facilitys that nut is installed are not stolen or are exactly scattered here and therely split, the facility that more particularly has special nature, utilized general bottle opener by the layman, spanners etc. revolve tool can be opened, tend to bring infringement to country or public interest, now in order to prevent this dismounting, but now mainly be to adopt the turn partial destruction deformation of external force with the threaded joint part, or adopt the mode of welding to be fixed, need interim frame when welding and adopt, difficulty more particularly just seems during operation in the open air, and the object of welding is stressed beautiful and clean communal facility to some and is just seemed uncomfortable, this shows, existing anti-dismounting mode exists construction intensity big, influences the communal facility aesthetic feeling, can't effectively prevent defectives such as dismounting sometimes.

The purpose of this utility model provides a kind of delicate structure, uses easily, can effectively prevent screw (bolt), nut is disassembled and do not influence and be connected facility tamper-resistant screw (bolt), nut attractive in appearance.

For achieving the above object, screw of the present utility model (bolt), nut, employing screws the structure that head sets up separately with this part that is threaded, promptly revolved tool block turn screw the head be shifted in the upper part of body that is threaded, the middle folder mouth of being convenient to twist off by weak stress high concentration connects, when revolving, this screw (bolt) or nut have after effect is issued to the tightening requirement, strengthen again and revolve under the situation of tool active force, screwing head just disconnects at the clamp mouth part of weakness with the body that is threaded, making top screw head breaks away from, and stay lower thread connect body because of disengaging revolve the tool promoter site screw head can't the derotation, thereby play the effect of anti-dismounting.

Compared with prior art, the utility model has following characteristics:

1, easy to use, will screw head after screw (bolt), nut screwed and twist off and can realize anti-dismounting, reduced labor intensity.

2, beautiful and clean, the termination of the body that is threaded that stays is designed to conical surface or spherical cambered surface, elegant in appearance, anti-dismounting is more effective.

The utility model tamper-resistant screw (bolt), nut are suitable for the connection as the facility of various anti-dismountings.

Fig. 1 is the wood screw of the utility model tamper-resistant screw (bolt), nut or the plan view of tapping screw structure.

Fig. 2 is the plan view of the bolt structure of the utility model tamper-resistant screw (bolt), nut.

Fig. 3 is the plan view of the bolt arrangement of the utility model tamper-resistant screw (bolt), nut.

Fig. 4 is the half sectional view of the nut structure of the utility model tamper-resistant screw (bolt), nut.

Describe concrete structure of the present utility model and working principle in detail below in conjunction with accompanying drawing.

As shown in the figure, can be by 1 top that is arranged on the top anti-pinch face 4 of the body 5 that is threaded that screws of bottle opener or spanner turn, connect by twisting off folder mouthfuls 3 in the middle of them, screwing 1 is taper neck 2 with twisting off between the folder mouthfuls 3, and the anti-pinch face 4 on the body 5 that is threaded is designed to conical surface or spherical cambered surface.

Working principle is as follows: with bottle opener or spanner screw screw (bolt) or nut screw 1 reach fastening purpose after, because screwing 1 is connected for taper neck 2 with twisting off between the folder mouth 3, therefore concentrate twisting off the stress that folder mouthful 3 places have formed height, so will revolve tool again exerts oneself a little, just can realize screwing 1 with the disengaging of the body 5 that is threaded, and the top anti-pinch face 4 of the body 5 that is threaded is designed to conical surface or spherical cambered surface, thereby after tightening, can prevent to reuse bottle opener, spanner etc. and revolve tool the body 5 that is threaded is withdrawed from.

Claims

1, a kind of tamper-resistant screw (bolt), nut, include available revolve that tool blocks screw head (1), the body that is threaded (5) of band screw, it is characterized in that: screw the top that head (1) is arranged on the body that is threaded (5), the folder of being concentrated by the stress of weakness between them mouthful (3) that twists off connects.

2, tamper-resistant screw according to claim 1 (bolt), nut is characterized in that: screwing head (1) and twisting off between the folder mouthful (3) is taper neck (2).

3, tamper-resistant screw according to claim 1 and 2 (bolt), nut is characterized in that: the anti-pinch face (4) on the body that is threaded (5) is conical surface or spherical cambered surface.