CN2287222Y

CN2287222Y - Bolt expander

Info

Publication number: CN2287222Y
Application number: CN 96218451
Authority: CN
Inventors: 崔俊峰
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-08-20
Filing date: 1996-08-20
Publication date: 1998-08-05
Anticipated expiration: 2006-08-20

Abstract

The utility model relates to a bolt expander for construction and decoration. Nothing remains but to put a tubular expanding nut (3) into a wall on which a hole is well drilled, and two slots are arranged on the circumference of the outside surface the expanding nut (3); the cross section of the expanding nut is provided with a cross open slot of which the inner is provided with regular screw threads and a steel ball (4), and the junction of the screw threads and the inner hole of the cross slot is provided with a taper hole (alpha). The front end of a bolt (1) is provided with an unthreaded part and the diameter of the bolt needs to be smaller than the diameter of the steel ball (4) for regulating the thickness of a workpiece, and the unthreaded point is additionally provided with the steel ball (4) of which the diameter needs to be smaller than the length of the internal screw thread of the expanding nut (3); afterwards, the rotation of the bolt (1) in the expanding nut (3) is utilized to push the steel ball (4) into the taper hole (alpha), the cross slot extends outwards to enable a workpiece or objects to be fixed, and the utility model has the advantages of beautiful appearance and high safety.

Description

Bolt expander

The utility model relates to a kind of building decoration fastening piece, particularly the Bolt expander of fixing on the wall.

The Bolt expander of China's use at present has certain defective, in two more than ten years not more under the news, Bolt expander is after installing workpiece or object, and the redundance of bolt exceeds workpiece or object 10MM～30MM, and is very dangerous and attractive in appearance, simultaneously also cause certain restriction to the user, wasted raw material again, not in the place of using or more renewing, Bolt expander can't take out as workpiece or object, therefore promptly require safety attractive in appearance, require to save the raw-material difficulty that taken place synchronously again.

The purpose of this utility model is to provide a kind of improved Bolt expander, it is had can make Bolt expander use attractive in appearance, the safety in back, and can save raw-material effect.

The purpose of this utility model is realized by following technological scheme: a kind of Bolt expander is made up of expand female (3), bolt (1), steel ball (4), nut (5), spring pad (6), plain cushion (7), it is characterized in that expanding female (3) in a tubular form, there is 2MM wide on the outer surface front end circumference, two grooves that 0.5MM is dark.At female (3) section that expands wide 1MM, length being arranged is bloated mother's (3) 1/2 cross opening slot, is regular screw threads in expand female (3), and screw thread is 2/3 of mother (3) length that expands, and cross recess place diameter of bore is than the little 0.5MM～1.5MM of bottom diameter of screw thread.Screw thread and cross recessed endoporus joint are provided with taper hole (α).Bolt (1) adopts the NBS plain bolt, bolt (1) front end has the no screw thread place of 6MM～14MM, its diameter is less than the diameter 0.2MM～0.5MM of steel ball (4), is to be used to regulate thickness of workpiece, and no screw thread place adds steel ball (4) diameter and is less than the long 4MM～5MM of female (3) internal thread that expands.

The purpose of this utility model can also further be realized by following technical characteristics: it is characterized in that bolt (1) active length adds steel ball (4) diameter and is no more than female (3) length that expands, steel ball (4) diameter must be less than female (3) internal thread bottom diameter that expands, greater than cross recess place diameter of bore, expand female (3) internal thread and cross recess endoporus joint taper hole are 30 °～40 °.

Concrete structure of the present utility model is provided by following examples and accompanying drawing thereof.

Fig. 1, model utility is at the sectional axonometric drawing of locking state not.

Fig. 2 is that model utility is looked sectional axonometric drawing on the left side that Fig. 1 does not lock state.

Fig. 3, model utility is at the sectional axonometric drawing of locking state.

A kind of Bolt expander, by expand female (3), bolt (1), steel ball (4) tightening nut (5), spring pad (6), plain cushion (7) is formed.Its working principle is that tubulose bloated female (3) is put into the hole of accomplishing fluently within the walls, the mother (3) of expanding includes a steel ball, put workpiece or object well, spring pad (6), plain cushion (7) are inserted in bolt (1), utilize bolt (1) in expand female (3), to rotate then and advance, promote taper hole (α) the cross opening that steel ball (4) enters expand female (3), expand female (3) are expanded, taper hole (α) outwards stretches, and expand female (3) are securely fixed within the walls.Its main feature is: after workpiece or object are taken down, bolt (1) can be taken out, so just can make the metope reinstatement, maintenance wall surface levelling, attractive in appearance, safety.When fixedly miniature workpiece or object, can not add fastening nut (5).

Claims

1, a kind of Bolt expander is made up of expand female (3), bolt (1), steel ball (4), nut (5), spring pad (6), plain cushion (7), it is characterized in that: expand female (3) in a tubular form, two grooves that 2MM is wide, 0.5MM is dark are arranged on the outer surface front end circumference, at female (3) section that expands wide 1MM, length being arranged is bloated female (3) 1/2 cross opening slot, in bloated female (3) is regular screw threads, screw thread is 2/3 of female (3) length that expands, cross recess place diameter of bore is than the little 0.5MM～1.5MM of bottom diameter of screw thread, and screw thread and cross recessed endoporus joint are provided with taper hole (α).Bolt (1) adopts the NBS plain bolt, and bolt (1) front end has the no screw thread place of 6MM～14MM, and its diameter is less than the diameter 0.2MM～0.5MM of steel ball (4), is to be used to regulate thickness of workpiece.No screw thread place adds steel ball (4) diameter and is less than the long 4MM～5MM of female (3) internal thread that expands.

2, according to the described device of claim 1, it is characterized in that bolt (1) active length adds steel ball (4) diameter and is no more than female (3) length that expands, steel ball (4) diameter must be less than female (3) internal thread bottom diameter that expands, greater than cross recess place diameter of bore.

3, device according to claim 1, it is 30 °～40 ° that it is characterized in that expanding female (3) internal thread and cross recess endoporus joint are provided with taper hole (α).