CN207715501U - A kind of expansion bolt for installing magazine - Google Patents

Abstract

A kind of expansion bolt for installing magazine, including dormant bolt, plain washer, tube expansion and tapered cup nut, it is characterised in that：The dormant bolt includes round end and screw rod, and internal thread C is additionally provided in dormant bolt, and the center of round end is equipped with Hexagon hole screw rod outer surface and is equipped with external thread of screw, and internal thread C is mutually communicated with Hexagon hole and internal thread C is through hole whorl.The utility model uses a kind of expansion bolt of special construction, expansion bolt itself on setting Hexagon hole and internal thread, expansion bolt is fixed on wall by allen wrench, and magazine is passed through by screw and coordinates the internal thread in dormant bolt that magazine is anchored on outside groove, solve the problems, such as that panel-switch can not be fixedly mounted in magazine hold-doun nut defect, at the same time, since the internal thread in dormant bolt is through hole whorl, construction personnel can be dynamic until providing a power outward to expansion bolt in internal thread transfer by screw, to be easier to take out expansion bolt.

Description

A kind of expansion bolt for installing magazine

Technical field

The utility model is related to a kind of expansion bolt more particularly to a kind of expansion bolts for installing magazine.

Technical background

During house decoration, various cables are connected in order to give in house, installation switch and socket, it usually needs in wall A groove is outputed on body, a magazine is then fixed on groove, cement mortar fixed cassette surrounding, the operation of wiring is dark The inside of box can be completed.

Magazine is a square cavity with opening, after completing patching operations inside the magazine, then need to pass through by Panel-switch is fixed in the opening of magazine.Magazine opening edge along can above extend have threaded hole fixed plate (be commonly called as Ear), panel-switch is then connect by 4 millimeters of screws with the nut in fixed plate.

Since fixed plate and magazine opening edge are along being wholely set, be constantly in stress, when in use between it is longer Afterwards, magazine ageing of plastics, fixed plate once fall off, and panel loosens therewith, if to reinstall panel, needing will be entire dark Box is replaced, and the defect that magazine then has time-consuming feed consumption is replaced.

Utility model content

The purpose of this utility model is to provide a kind of above-mentioned technical problem is solved for installing the expansion bolt of magazine.

The scheme that the utility model will solve above-mentioned technical problem is：A kind of expansion bolt for installing magazine is provided, Including dormant bolt, plain washer, tube expansion and tapered cup nut, it is characterised in that：The dormant bolt includes round end and screw rod, described Internal thread C is additionally provided in dormant bolt, the center of the round end is equipped with Hexagon hole, and the screw rod outer surface is equipped with screw rod External screw thread, the internal thread C are mutually communicated with Hexagon hole；Loss of weight window, expansion joint (E.J.) and friction protrusion are equipped in the tube expansion；Institute It includes taper surface, cylindrical surface and nut inner thread to state tapered cup nut, and the cylindrical surface is equipped with triangular strip.

As an improvement, the internal thread C is through-hole, the central axis of Hexagon hole central axis and internal thread C are in same One position.

As an improvement, the maximum gauge of the Hexagon hole is no more than 2/3rds of round end diameter, the depth of Hexagon hole 2/3rds of degree no more than round end depth.

As an improvement, the loss of weight window maximum length is no more than the half of tube expansion length, loss of weight number of windows is not More than four；The friction protrusion can be rectangular-shaped or triangular shape.

As an improvement, angle is 30 ° to 40 ° between the taper surface and cylindrical surface center line, the triangular strip length is not More than the length on cylindrical surface.

The beneficial effects of the utility model are：

Switch after a long time in use, when needing replacing magazine, without chiseling wall take out by magazine ageing of plastics The magazine of defect inner ear, it is not necessary to bury new magazine again.The utility model uses a kind of expansion bolt of special construction, is expanding Expansion bolt, is fixed on wall, and lead to by itself the upper setting Hexagon hole and internal thread of bolt by allen wrench Screw is crossed across magazine and coordinates the internal thread in dormant bolt that magazine is anchored on outside groove, magazine hold-doun nut is solved and lacks The problem of panel-switch can not be fixedly mounted in damage, at the same time, since the internal thread in dormant bolt is through hole whorl, constructor Member can be dynamic until providing a power outward to expansion bolt in internal thread transfer by screw, to be easier to take out expanding screw Bolt.

Description of the drawings

The utility model is described further below in conjunction with the accompanying drawings：

Fig. 1 is the structural schematic diagram of expansion bolt；

Fig. 2 is the sectional view of expansion bolt；

Fig. 3 is the sectional view of dormant bolt；

Fig. 4 is the structural schematic diagram of tube expansion；

Fig. 5 is the structural schematic diagram of tapered cup nut.

Specific implementation mode

Technical solutions of the utility model are described in detail in the following with reference to the drawings and specific embodiments, with further Understand the purpose of this utility model, scheme and effect, but is not intended as the limit of the appended claims for the utility model protection domain System.

By Fig. 1 to Fig. 3 it is found that expansion bolt includes dormant bolt 1, plain washer 2, tube expansion 3 and tapered cup nut 4, countersunk head spiral shell Bolt 1 includes round end 11 and screw rod 12, and screws of the internal thread C13 for connecting installation magazine, round end 11 are additionally provided in dormant bolt 1 Center be equipped with Hexagon hole 111, construction personnel can be used with the matched allen wrench of Hexagon hole to countersunk head spiral shell Bolt is rotated, since 12 outer surface of screw rod is equipped with external thread of screw 121, by the rotation of allen wrench, tapered cup nut 4 with Dormant bolt 1 makes tapered cup nut 4 be moved toward 111 direction of Hexagon hole by threaded engagement, in order to ensure the strong of dormant bolt Degree and easy for construction, 2/3rds of maximum gauge no more than 11 diameter of round end of Hexagon hole 111, Hexagon hole 111 Depth is no more than 2/3rds of 11 depth of round end.

There is Fig. 2 it is found that internal thread C13 is mutually communicated with Hexagon hole 111, internal thread C13 is through-hole, Hexagon hole 111 Central axis and the central axis of internal thread C13 be in same position, since internal thread C13 is through hole whorl, work as constructor Can be more than the screw of expansion bolt length by a length, by screw in internal thread C transfers when member wants to take out expansion bolt It moves until screw top to wall, slowly rotation makes screw continue to move to, at this point, expansion bolt can be by one and screw movement side To opposite power, construction personnel can facilitate taking-up expansion bolt.

As shown in Figure 4, loss of weight window 301, expansion joint (E.J.) 302 and friction protrusion 303 are equipped in tube expansion 3, friction protrusion 303 can To effectively improve tube expansion 3 when strutting with frictional force between the walls, it is more firm in wall hole to ensure that expansion bolt is fixed on Gu friction protrusion 303 can be rectangular-shaped or triangular shape.At the same time, in order to both can guarantee the intensity of tube expansion or can reduce swollen Pipe weight, 301 maximum length of loss of weight window are no more than the half of 3 length of tube expansion, and 301 quantity of loss of weight window is no more than four It is a.

As shown in Figure 5, tapered cup nut 4 includes taper surface 42, cylindrical surface 43 and nut inner thread 41, and cylindrical surface 43 is equipped with Triangular strip 431, such setting not only increase tapered cup nut 4 and rotating friction force between the walls, it is therefore prevented that construction personnel It can be because various factors makes dormant bolt 1 that tapered cup nut 4 be driven to rotate together, to make while rotating dormant bolt 1 It can not be fixed in wall hole at expansion bolt, and since the moving direction of tapered cup nut is moved along dormant bolt axial direction It is dynamic, and it is that face contacts, therefore frictional force is very big that original entire cylindrical surface 43 is contacted with wall, by the way that triangular strip 431 is arranged, So that contact surface becomes line contact, the frictional force of axial direction is substantially reduced so that tapered cup nut 4 can be more easily by tube expansion 3 strut, while triangular strip 431 does not influence strutting for tube expansion 3, the length on 431 of length no more than cylindrical surface 43 of triangular strip in order to prevent Degree.Equally, in order to make tube expansion 3 be more prone to strut and ensure that tube expansion 3 can be rigidly secured in porthole after strutting completely, Angle is 30 ° to 40 ° between 43 center line of taper surface 42 and cylindrical surface.

Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe It knows those skilled in the art and makes various corresponding change and deformations, but these corresponding changes and change in accordance with the present invention Shape should all belong within the protection domain of appended claims of the invention.

Claims (5)

1. a kind of expansion bolt for installing magazine, including dormant bolt (1), plain washer (2), tube expansion (3) and tapered cup nut (4), it is characterised in that：The dormant bolt (1) includes round end (11) and screw rod (12), is additionally provided in the dormant bolt (1) The center of internal thread C (13), the round end (11) are equipped with Hexagon hole (111), and screw rod (12) outer surface is equipped with spiral shell Bar external screw thread (121), the internal thread C (13) are mutually communicated with Hexagon hole (111)；Loss of weight window is equipped in the tube expansion (3) Mouth (301), expansion joint (E.J.) (302) and friction protrusion (303)；The tapered cup nut (4) includes taper surface (42), cylindrical surface (43) and spiral shell Female internal thread (41), the cylindrical surface (43) are equipped with triangular strip (431).

2. a kind of expansion bolt for installing magazine according to claim 1, including dormant bolt (1), plain washer (2), tube expansion (3) and tapered cup nut (4), it is characterised in that：The internal thread C (13) is through-hole, the center of Hexagon hole (111) The central axis of axis and internal thread C (13) are in same position.

3. a kind of expansion bolt for installing magazine according to claim 1, including dormant bolt (1), plain washer (2), tube expansion (3) and tapered cup nut (4), it is characterised in that：The maximum gauge of the Hexagon hole (111) is no more than round end (11) 2/3rds of diameter, the depth of Hexagon hole (111) are no more than 2/3rds of round end (11) depth.

4. a kind of expansion bolt for installing magazine according to claim 1, including dormant bolt (1), plain washer (2), tube expansion (3) and tapered cup nut (4), it is characterised in that：Loss of weight window (301) maximum length is long no more than tube expansion (3) The half of degree, loss of weight window (301) quantity are no more than four；The friction protrusion (303) is rectangular-shaped or triangular shape.

5. a kind of expansion bolt for installing magazine according to claim 1, including dormant bolt (1), plain washer (2), tube expansion (3) and tapered cup nut (4), it is characterised in that：Angle between the taper surface (42) and cylindrical surface (43) center line It is 30 ° to 40 °, the length on the of length no more than cylindrical surface of the triangular strip (431) (43).