CN2244640Y - Bidirectional upset bolt - Google Patents

Abstract

The utility model relates to a bidirectional expansion bolt, wherein, the middle part of a screw rod 1 shaped as a cone 4 which is shrunk downward. The lower part screw bolt 1 is connected with an expansion nut 3 by screw threads. The upper end of the expansion nut 3 is cone-shaped. An expansion sleeve 2 is sheathed between the cone 4 of the screw rod and the expansion nut 3. Both the upper and the lower ends of the expansion sleeve 2 are provided with expansion grooves. The utility model has the advantages of bidirectional expansion, great strength of expansion, good vibration resistance, non-easy looseness caused by tilting or swing, firm and reliable fixation, etc.

Description

Two-way EXPANSION ANCHOR BOLTS

The utility model relates to a kind of EXPANSION ANCHOR BOLTS.

EXPANSION ANCHOR BOLTS is a widely used metal part in addition in building, the industries such as machinery installations, finishing, and traditional expansion bolt is unidirectional expansion, and tension force is less, and a force bearing point is only arranged, and tilts easily or waves looseningly, thereby fixes very not solid and reliable.

The purpose of this utility model designs a kind of two-way expansion, big, the reliable two-way EXPANSION ANCHOR BOLTS of fixation of tension force exactly.

For achieving the above object, the two-way EXPANSION ANCHOR BOLTS that the technical solution adopted in the utility model is made up of screw rod, expansion sleeve, swelling nut, its structural feature is, the position is the taper of contracting down near the screw rod middle part, the screw rod lower end is connected with the swelling nut thread, swelling nut upper end is tapered, and expansion sleeve is enclosed within outward between the taper and swelling nut of screw rod, and the expansion sleeve upper and lower end all has expansion slot.

The outer surface indentation of expansion sleeve.

After adopting design as above, place the EXPANSION ANCHOR BOLTS in the objects such as metope, ground, when fastening, expansion sleeve, upper and lower end (or innner and outer end) all expand, and the tension force of generation is more powerful, and two fixed supports are arranged, be difficult for or wave loosening, thereby fixation, reliable, the sawtooth of expansion sleeve outer surface embed wall, in more strengthened stretching resistance.And whole bolt, simple in structure, with low cost, easily manufactured.

Below in conjunction with the drawings and specific embodiments the utility model is done to describe in further detail.

Fig. 1 is the sectional structure schematic representation of the utility model embodiment when expanding swelling.

Fig. 2 is the A-A sectional view of Fig. 1.

Fig. 1, Fig. 2 illustrate, the utility model one embodiment is: in the two-way EXPANSION ANCHOR BOLTS of being made up of screw rod 1, expansion sleeve 2, swelling nut 3, there is the step 6 of an evagination position near screw rod 1 middle part, step 6 belows are the taper of dwindling 4 downwards, in reality is implemented, can not have step 6 yet and directly be the taper 4 of a projection.Screw rod 1 lower end is threaded with swelling nut 3, and swelling nut 3 upper ends are tapered, between the expansion sleeve 2 outer tapers 4 and swelling nut 3 that are enclosed within on the screw rod 1, and expansion sleeve 2 outer surface indentations, its upper and lower end all has expansion slot 5.

Screw rod 1 and the swelling nut 3 relative the other ends can be shapes such as annulus, hook or bolt, the needs of fasten thing to satisfy, hanging thing, fixed object aspects such as (machines).

When avoiding in mounting hole, installing, skid between swelling nut 3 and the sleeve pipe 2, with swelling nut 3 conical surface annular knurls and quench and get final product, between sleeve pipe 2 and the ground metope etc. skid then can by with sleeve pipe 2 upper ends in mounting hole in advance swelling solve.During installation, the upper end of not putting into mounting hole from screw rod 1 turns screw rod 1, swelling nut 3 is moved up along screw thread, distance between the taper 4 of screw rod 1 and the taper of swelling nut 3 shortens, the all outside distending of expansion sleeve 2 upper and lower ends, sawtooth on it embeds in the support, and last sleeve pipe upper and lower end all is fixed in the supports such as wall, ground by swelling firmly.

The utility model swelling nut 3 and screw rod taper 4 in reality is implemented, interchangeable position, promptly the position is provided with the swelling nut of being with taper near the screw rod middle part, and is to be the big taper of downward change in the screw rod lower end.

" upper and lower end " of the present utility model wording can not be made narrow sense and understand, and only is to define for the convenient mutual alignment relation of describing member.

The utility model is measured through on probation, and its tensile strength improves 2-3 doubly than the common EXPANSION ANCHOR BOLTS of same specification, and the ability of bearing vibration then improves 4-8 doubly.Can be used for the occasion that various requirement fixedly secures, be particularly suitable for lathe and equipment installs and fixes use.

Claims (2)

1, a kind of two-way EXPANSION ANCHOR BOLTS, form by screw rod (1), expansion sleeve (2), swelling nut (3), it is characterized in that: the position is the taper (4) of contracting down near screw rod (1) middle part, and screw rod (1) lower end is threaded with swelling nut (3), and swelling nut (3) upper end is tapered; Expansion sleeve (2) is outer to be enclosed between the taper (4) and swelling nut (3) of screw rod, and expansion sleeve (2) upper and lower end all has expansion slot (5).

2, a kind of two-way EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that: described expansion sleeve (2) outer surface indentation.