CN2181590Y

CN2181590Y - Theft-proof bolt fastening device

Info

Publication number: CN2181590Y
Application number: CN 92210969
Authority: CN
Inventors: 罗钊君; 邢树勤; 侯成林
Original assignee: FUXIN ELECTRICITY ADMINISTRATION
Current assignee: FUXIN ELECTRICITY ADMINISTRATION
Priority date: 1992-05-21
Filing date: 1992-05-21
Publication date: 1994-11-02
Anticipated expiration: 2002-05-21

Abstract

The utility model relates to a theft-proof screw bolt fixed locking device. The theft-proof screw bolt fixed locking device is composed of a screw bolt (1), a nut (2), a tight expanding core (4), and a jacket (3). Stepped holes (5) are drilled on the axial center line of the thread end of the screw bolt (1), threads are carved on the thin hole segment of the lower part of the axial center line, and an expanding sleeve (7) which is equally divided is arranged on the thick hole segment of the upper part of the axial center line, and is screwed into the nut (2). The jacket (3) is arranged on the upper part of the expanding sleeve (7), and a round hole is drilled on the center of the bottom part of the expanding sleeve (7). The thread end of the lower part of the tight expanding core (4) is screwed into the inner screw of the screw bolt (1), the expanding sleeve (7) is tightly expanded by the cone-type expanding wedge (8) of the middle part of the tight expanding core (4), the jacket (3) is tightly pressed by a dummy club, and the thread of the screw bolt is destroyed by the cone-type expanding wedge (8) in the expanding sleeve (7), which can efficiently prevent other people from optionally demounting the theft-proof screw bolt fixed locking device. The theft-proof screw bolt fixed locking device has safety, reliability, and convenient use, and can be applicable to the mounting tight locking devices of the equipment of electric power, communication, etc.

Description

Theft-proof bolt fastening device

The utility model belongs to fastening piece, particularly a kind of anti-theft bolt securing means.

At present, general antitheft securing means all is to adopt special-shaped nut, and nut cooperates the purpose that reaches antitheft with special spanner.As CN2064835U, patents such as CN2045440U, they have a common shortcoming: common wrench can not start, but still can its startup be lost antitheft effect with common box spanner, though and 892077174 patented technologies have prevented that effectively the robber from unloading, but also limited normal repair demolition simultaneously, this all is unfavorable for practical application.

The purpose of this utility model is to overcome above technical deficiency, and a kind of anti-theft bolt securing means is provided.

The utility model is to realize like this; a kind of anti-theft bolt securing means is made up of bolt, nut, swelling core and sheath, screws in locking nut in the outside of bolt, and bolt has the five equilibrium expansion set; compress sheath; the swelling core passes sheath and screws in the bolt, at externally threaded expansion set distending, lock-nut; swelling core end is three terrace with edge shape bodies; must adopt the dismounting of special tool spanner, can prevent other people random demounting bolt, protection equipment proper functioning.

The utility model adopts mechanical locking measure with the supporting use of special tool spanner, realizes easily, and is easy and simple to handle, fastening reliable, prevents that other people from dismantling.

Describe with by way of example below in conjunction with accompanying drawing.

Fig. 1 shows a kind of anti-theft bolt securing means structural drawing.

Fig. 2 shows a kind of anti-theft bolt securing means plan view.

Among the figure, the 1-bolt; The 2-nut; The 3-sheath; 4-swelling core; The 5-shoulder hole; The 6-screw thread; The 7-expansion set; The 8-taper wedge that expands; The 9-boss; 10-three terrace with edge shape bodies

A kind of anti-theft bolt securing means, by bolt (1), nut (2), swelling core (4) and sheath (3) are formed, threaded end shaft axis at bolt (1) is drilled with shoulder hole (5), hole depth is to 2/3 place of bolt shank, gross porosity is to 1/5 place of bolt shank, at bottom pore section line silk, the top coarse pore section is split into five equilibrium expansion set (7), screw in nut (2), sheath (3) is installed on expansion set (7) top, and sheath (3) bottom centre is drilled with circular hole, and swelling core (4) passes circular hole, swelling core (4) lower thread end screws in the internal thread of bolt (1), taper bloated wedge (8) tapering in middle part is 30 °, swelling expansion set (7), and boss (9) compresses sheath (3), swelling core (4) end is three terrace with edge shape bodies (10), and the side is a curved surface.

During use, the bolt (1) after the processing is penetrated, screw in nut (2), go up placement sheath (3) at expansion set (7), swelling core (4) is penetrated sheath (3) circular hole, in the internal thread of lower bolt (1), taper wedge (8) the swelling expansion set (7) that expands, boss (9) compresses sheath (3), swelling core (4) end is three terrace with edge shape bodies, and the side is curved surface, and is fastening by special spanner, during dismounting, opposite with above step.Prevent that other people from arbitrarily dismantling, thus protection equipment proper functioning.

A kind of anti-theft bolt securing means is three terrace with edge shape bodies in swelling core end, settles sheath on expansion set, and the wedge that expands destroys the screw rod lines in expansion set, play antitheft, locking effect, and bolt clamp device can not arbitrarily be dismantled.

A kind of anti-theft bolt securing means, reasonable in design, simple in structure, easy to use, install fastening applicable to equipment such as electric power, communications.

Claims

1, a kind of anti-theft bolt securing means, by bolt (1), nut (2), swelling core (4) and sheath (3) are formed, the threaded end shaft axis that it is characterized in that said bolt (1) is drilled with shoulder hole (5), pore section line silk in the bottom, the top coarse pore section is split into five equilibrium expansion set (7), screw in nut (2), expansion set (7) top is installed sheath (3) bottom centre and is drilled with circular hole, swelling core (4) lower thread end screws in the internal thread of bolt (1), bloated wedge (8) the swelling expansion set (7) of middle part taper, boss compresses sheath (3), and swelling core (4) end is three terrace with edge shape bodies (10);

2, a kind of anti-theft bolt securing means according to claim 1 is characterized in that said swelling core (4) side is a curved surface.