CN2219395Y

CN2219395Y - Backward hook type detachable expansive bolt

Info

Publication number: CN2219395Y
Application number: CN 95243343
Authority: CN
Inventors: 徐德胜; 黄镝
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-01-14
Filing date: 1995-01-14
Publication date: 1996-02-07
Anticipated expiration: 2005-01-14

Abstract

The utility model discloses a backward hook type detachable expansion bolt, being composed of an ordinary standard screw bolt (1), a fixed depth top expansible tube (2) whose external side of one end is a conical surface and a sleeve (3) with an expansible opening and an internal screw thread. An external screw thread of one end of the screw bolt (1) can be meshed with the internal screw thread of the sleeve (3) with an expansible opening, when the screw bolt (1) is rotated, the sleeve (3) with an expansible opening moves towards the direction of the head part of the screw bolt, the conical face of the fixed deep expanding tube (2) is inserted into the inner hole of the sleeve (3) with an expansible opening to expand the opening outwards and form a backward hook to be embedded and fixed in the wall and the purpose of fixing with the peripheral wall. The utility model ha the advantages that the fastening force is large, the use is convenient, the utility model can be matched with the ordinary standard screw bolt, etc.

Description

Fluking type assembling and disassembing expanding bolt

The utility model relates to the removable EXPANSION ANCHOR BOLTS of a kind of fluking type.Belong to the device technology field that fastening or fixed component or machine parts are used.

Traditional expansion bolt, but form by the sleeve pipe and the nut of the bolt enlarging of being with the wedge shape root.The EXPANSION ANCHOR BOLTS of this style is that but its wedge shape root expands the enlarging sleeve pipe and opens during by tightening bolt, utilizes sleeve pipe and the frictional force between the fixed wall after the enlarging to reach fastening, purpose of connecting.Being connected between this EXPANSION ANCHOR BOLTS and the fixed wall easily produces loosening, and its bolt can not be general with plain bolt, once fixing, just can not dismantle; In addition, its head is usually given prominence in workpiece outside different in size, influence attractive in appearancely, can not adapt to the trend of modern architecture decoration.

The purpose of this utility model is to overcome deficiency of the prior art, provide a kind of fastening force strong, can be for convenience detach, and can with the matching used EXPANSION ANCHOR BOLTS of common standard bolt (or screw).

Task of the present utility model is finished by following measures: but the removable EXPANSION ANCHOR BOLTS of a kind of fluking type expands sleeve pipe by the depthkeeping top that outside tapped enlarging sleeve pipe, the end is conical surface and the common standard bolt is formed.During work, bolt passes depthkeeping top and expands sleeve pipe, but its outside thread be meshed with the internal thread of enlarging sleeve pipe, but the conical surface of depthkeeping top expansion sleeve pipe then inserts the chamfering endoporus of enlarging sleeve pipe, but this end of enlarging sleeve pipe longitudinally has some slotted eyes on perisporium.When swivel bolt, but the enlarging sleeve pipe move to the bolt head direction, but depthkeeping top expand the conical surface of sleeve pipe and the enlarging sleeve pipe expanded open, but the enlarging cannula tip that expands after opening be in the barb-like insertion fixed wall, make EXPANSION ANCHOR BOLTS reach fixing, purpose of connecting.At this moment, stay workpiece outer then be the bolt head of standard shape (hexagon, interior hexagonal, square, flat shoulder shape etc.).When time spent not, bolt unloaded get final product.

Because but EXPANSION ANCHOR BOLTS of the present utility model has adopted fluking type enlarging sleeve pipe, increased the fastening force of bolt during work, and can prevent that it is loosening in fixed wall.The utility model can with the supporting use of plain bolt, can select the bolt of different size and kind according to different occasions for use, make ornamental piece reach elegant in appearance, uniform.When not in use, bolt can unload, and makes metope must keep smooth, no protrusion, and the bolt of pulling down can continue to use.The utility model is compared with traditional expansion bolt, has that fastening force is big, an applied range, advantage such as easy to operate.Therefore it can adopt interior hexagonal, flush bolt, and when fastening workpiece, bolt head can be imbedded in the workpiece, can be used to the fixing metal doorframe, window frame is connected with metope; Fixing ceiling fan seat on ceiling board on cement floor fixedly when steel table, chair pin, existing EXPANSION ANCHOR BOLTS can not occur using and produces screw rod and be exposed at the phenomenon that the outer length of workpiece differs, and accomplish neat appearance.

Fig. 1 is that the utility model fluking type assembling and disassembing expanding bolt is installed sectional view;

Fig. 2 is the bolt view of model utility shown in Figure 1;

Fig. 3 is sectional view and the end elevation that sleeve pipe is expanded on the depthkeeping top of model utility shown in Figure 1;

But Fig. 4 is the sectional view and the end elevation of the enlarging sleeve pipe of model utility shown in Figure 1.

Below in conjunction with the drawings and specific embodiments the utility model is described in further detail.

In installation sectional view shown in Figure 1, but a kind of fluking type assembling and disassembing expanding bolt is that the depthkeeping top expansion sleeve pipe 2 of conical surface 9 and the enlarging sleeve pipe 3 of band internal thread 6 are formed by common standard bolt 1, an end outer side surface.But enlarging sleeve pipe 3 one ends have internal thread 6, and the other end endoporus has chamfering 7, and longitudinally have some slotted eyes 8 on perisporium, and present embodiment is 4 slotted eyes, as shown in Figure 4.It is one section or several sections pipes that sleeve pipe 2 is expanded on the depthkeeping top, and present embodiment is one section pipe, and its internal diameter is slightly larger than the external diameter of bolt 1, and bolt 1 can pass the depthkeeping top and expand sleeve pipe 2.It is conical surface 9 that but sleeve pipe 2 and enlarging sleeve pipe 3 adjacent end outer side surfaces are expanded on this depthkeeping top, and an end end face adjacent with workpiece 4 is a plane 10, as shown in Figure 3.One end of standard bolt 1 has outside thread 11, and the other end is a bolt head 12, and its shape can be hexagon, square, interior hexagon, flat shoulder shape etc., and present embodiment is a hexagon, as shown in Figure 2.During installation, but sleeve pipe 2 is expanded on the enlarging sleeve pipe 3 of band internal thread 6 and depthkeeping top to be placed on earlier in the suitable wall hole 5 of the degree of depth of accomplishing fluently in advance, treat that fixation workpiece 4 enters the depthkeeping top and expands in sleeve pipe 2 and the enlarging sleeve pipe 3 but again bolt 1 is passed, the head 12 of bolt 1 is exposed at workpiece 4 outsides, but the outside thread 11 of the other end is meshed with the internal thread 6 of enlarging sleeve pipe 3, when with spanner application of force swivel bolt 1, but enlarging sleeve pipe 3 moves to bolt head 12 directions, but the depthkeeping top is expanded the conical surface 9 of sleeve pipe 2 and is inserted in the interior Hole chamfering 7 of people's enlarging sleeve pipe 3, but make the enlarging sleeve pipe 3 that has slotted eye 8 to extending out out, become four paws shape, along with the spanner application of force, but enlarging sleeve pipe 3 continues to move, outwards enlarging, form a barb, tightly swollen tight in the embedding people fixed wall, reach and the fixing purpose of perisporium.Bolt 1 unscrewed withdraw from, can unload workpiece 4.This hole can be used repeatedly, and bolt 1 is also reusable.

Claims

1, but a kind of fluking type assembling and disassembing expanding bolt of mainly being made up of common standard bolt, depthkeeping top expansion sleeve pipe enlarging sleeve pipe is characterized in that; But enlarging sleeve pipe (3) one ends of this model utility have internal thread (6), and the other end endoporus has chamfering (7), and longitudinally has slotted eye (8) on perisporium, and the slotted eye number is greater than 2; The common standard bolt (1) of this model utility, the outside thread of one end (11) but be meshed with the internal thread (6) of enlarging sleeve pipe (3), the bolt head of the other end (12), its shape can be hexagon, interior hexagon, square, flat shoulder shape; This model utility also is with a depthkeeping top and expands sleeve pipe (2) on bolt (1), but be positioned between enlarging sleeve pipe (3) and the bolt head (12), this sleeve pipe (2) but an end outer side surface adjacent with enlarging sleeve pipe (3) is conical surface (9), but can insert in the interior Hole chamfering (7) of enlarging sleeve pipe (3) during installation.

2, fluking type assembling and disassembing expanding bolt according to claim 1 is characterized in that; Above-mentioned depthkeeping top expansion sleeve pipe (2) can be made up of one section pipe, also can be made up of pipe more than two sections or two sections.