CN2300754Y

CN2300754Y - Upset bolt

Info

Publication number: CN2300754Y
Application number: CN 97233991
Authority: CN
Inventors: 潘哲
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-08-16
Filing date: 1997-08-16
Publication date: 1998-12-16
Anticipated expiration: 2007-08-16

Abstract

The utility model relates to a component for connection, composed of a screw bolt, a screw nut and an expansion tube. The utility model is characterized in that the inner side of the upper end of the expansion tube is provided with screw threads; from the middle part of the tube to the lower part of the tube, the thickness of the tube wall is gradually increased, and the internal diameter is gradually decreased; the inner side of an opening of the tube is provided with annular protrusions; an opening of the lower part of the expansion tube is provided with a cone-shaped suspension plug; the upper surface and the lower surface of the suspension plug are provided with an annular clamping groove which is cooperated with the protrusions; an expansion suspending screw bolt is inserted onto the dead end of a hole; when plugged into the expansion tube, the suspension plug is fixed to an object. The utility model has the advantages of firm connection and convenient operation.

Description

Upset bolt

The utility model belongs to a kind of EXPANSION ANCHOR BOLTS, be to traditional expansion bolt improvement, be suitable for being connected of workpiece and workpiece or workpiece and building.

In installing engineering, workpiece and workpiece or workpiece are connected with building, be to realize by the EXPANSION ANCHOR BOLTS link, this bolt is by bolt that has expansion-head and the nut that is enclosed within on the bolt, expand tube is formed, the expand tube bottom has many expansion joint (E.J.)s vertically, during connection, earlier beat the inner on the object and be to be inserted into the cecum in hole with the EXPANSION ANCHOR BOLTS of diameter then in the hole of cecum being connected, again with bolt nut screwing clamping on the end outside the hole, the expand tube lower end is opened, make itself and hole wall produce bigger frictional force, connect with realization, but the soundness that connects is relatively poor, easily come off, its reason is:

1, existing EXPANSION ANCHOR BOLTS structure is unreasonable, and the expand tube wall thickness is unanimous between the higher and lower levels, and inner wall shape does not have any variation, the cecum diameter in hole can not enlarge in addition, makes the expand tube lower end near hole wall, even following nutting energetically, the open angle in expand tube lower end is also little, and expansive force is little, and is easily loosening.

2, the fixing of expand tube realizes by fastening nut that full expand tube can not be fixed on separately on the connected object, and inconvenient operation is dumb.

The purpose of this utility model is that design is a kind of rational in infrastructure, easy to connect, flexible, firmly practical Upset bolt.

The utility model Upset bolt, form by screw rod, the nut and the expand tube that are enclosed within on the screw rod, the expand tube lower end edge axially evenly respectively has many expansion joint (E.J.)s, it is characterized in that on the inwall of expand tube upper end, having screw thread, this screw thread matches with screw rod, and down tube wall is thickeied gradually from the middle part of expand tube, and the internal diameter of pipe diminishes gradually, establish the projection of a ring-type in the inboard of lower nozzle, this projection is hung plug buckle mutually with the taper type that has the ring-type draw-in groove.

The circular protrusion of expand tube lower nozzle inboard, its cross section are zigzag, the inclined-plane of the tooth mouth of pipe that faces down, and the plane of tooth is towards upper orifice.

Near the upper and lower table top of taper type extension plug the outside respectively has a ring-type draw-in groove, the cross section of this groove is zigzag, and consistent with the cross section of expand tube lower nozzle inside protrusions, match, the inclined-plane of sawtooth is towards upper table surface, the plane of the sawtooth table top that faces down.

Taper type is hung the external diameter and the expand tube external diameter basically identical of plug following table.

Screw rod and nut can replace with bolt.

The available entire body bolt that expands of screw rod of the present utility model and extension plug replaces.

Described upper table surface is little table top, and following table is big table top.

The utility model has following advantage compared with the prior art:

1, reasonable in design, under the constant situation of expand tube external diameter, its tube wall is down thickening gradually from the middle part, and bore dwindles gradually, the cecum of in addition placing the hole of Upset bolt can enlarge (existing " Cecum counterbore drill bit " patent application, application number 97233785.7), fill in when squeezing into expand tube so hang, the lower end opening angle of pipe is big, produce very big gram calorie power between expand tube and the hole wall, be connected firmly.

2, because of the projection of expand tube lower nozzle inboard, the ring-type draw-in groove of hanging the plug following table outside with taper type can carry out self-locking at the cecum in hole, can not become flexible, so expand tube just can be individually fixed on the object, easy to connect, flexible, can be widely used on the industries such as finishing, building, post and telecommunications, electric industry.

Fig. 1 is the expand tube structural representation of Upset bolt;

Fig. 2 is the extension plug structure schematic representation of Upset bolt;

Fig. 3 is a sectional view of hanging plug;

Fig. 4 is that screw rod and nut are installed with workpiece and building connection diagram in expand tube upper end;

Fig. 5 is that expand tube upper end construction bolt will be worked and the building connection diagram;

Fig. 6 installs the entire body bolt with workpiece and building connection diagram in the expand tube.

Expand tube 1 is arranged among the figure, and taper type is hung plug 2, expand tube upper end internal thread 3, expansion joint (E.J.) 4, circular protrusion 5, the inclined-plane 6 of saw-toothed projections, the plane 7 of saw-toothed projections, taper type is hung the inclined-plane 8,9 of the upper and lower zigzag fashion draw-in groove of plug, the plane 10,11 of upper and lower zigzag fashion draw-in groove, nut 12, screw rod 13, a bloated entire body bolt 14, workpiece 15, building 16, packing ring 17.

Now for example accompanying drawings workpiece and building connection procedure:

On building, make a call to earlier a inner and be the hole of cecum, use cecum grooved bit then with diameter, to Cecum counterbore, again the projection of the lower nozzle of expand tube is buckled and cooperates with hanging beyond the Great Wall the draw-in groove in the table top outside, will buckle the cecum that the expand tube of filling in is inserted into the hole then, again in the reinforcing of expand tube outer end, making to hang to fill in inserts in the expand tube gradually, open gradually the pipe lower end, continues reinforcing, when the projection of lower nozzle slips into the draw-in groove of hanging the plug following table outside, expand tube promptly is lockable, be securely fixed on the building, during connection, load onto screw rod in the expand tube upper end, put workpiece, packing ring, fastening nut is about to workpiece and building and links together.

Above-mentioned workpiece is connected with building, and the link of break-through body bolt is finished in the also available expand tube shown in Figure 6, behind the cecum with this link patchhole, puts workpiece, packing ring and nut successively in the outer end of bolt, and fastening nut is promptly finished connection.

Claims

1, a kind of Upset bolt, form by screw rod (13), the nut (12) and the expand tube (1) that are enclosed within on the screw rod (13), expand tube (1) lower end edge axially evenly respectively has many expansion joint (E.J.)s (4), it is characterized in that on the inwall of expand tube (1) upper end, having screw thread (3), this screw thread (3) matches with screw rod (13), down tube wall is thickeied gradually from the middle part of expand tube (1), the internal diameter of pipe (1) diminishes gradually, establish a circular protrusion (5) in the inboard of lower nozzle, this projection (5) is hung plug (2) buckle mutually with the taper type that has the ring-type draw-in groove.

2, according to the described bolt of claim 1, it is characterized in that the circular protrusion (5) of the inboard of expand tube (1) lower nozzle, its cross section is zigzag, the inclined-plane of tooth (6) mouth of pipe that faces down, the plane of tooth (7) are towards upper orifice.

3, according to the described bolt of claim 1, it is characterized in that near the outside taper type is hung the upper and lower table top of filling in (2) respectively has a ring-type draw-in groove, the cross section of this groove is zigzag, and consistent with the cross section of expand tube (1) lower nozzle inside protrusions (5), match, the inclined-plane of sawtooth (8), (9) are towards upper table surface, the plane of sawtooth (10), (11) table top that faces down.