CN102889277A

CN102889277A - Fastening type expansion bolt

Info

Publication number: CN102889277A
Application number: CN2012103982578A
Authority: CN
Inventors: 马涛
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-10-18
Filing date: 2012-10-18
Publication date: 2013-01-23

Abstract

The invention discloses a fastening type expansion bolt and belongs to hardware. The fastening type expansion bolt comprises a bolt and an expansion pipe, wherein two pipes, namely an expansion pipe and a wedge pipe, are sleeved on an expansion rod; one end of the expansion pipe is provided with an open groove to form an open piece; the left end of the expansion pipe is axially positioned by a nut of a bolt; the right end of the expansion pipe is provided with an equally divided open piece; the right end of a screw rod sequentially penetrates through the expansion pipe and the wedge pipe; the left end of the wedge pipe is provided with a taper; the right end of the wedge pipe is provided with a gasket; the end face of the gasket is contacted with the right end face of the wedge pipe and the left end face of an elastic gasket respectively; the elastic gasket is supported by the nut; and the nut is connected with the bolt through a thread. When the fastening type expansion bolt works, the expansion pipe is extruded in a wedge area of the wedge pipe, so that the radius of the open piece of the expansion pipe is increased, and the function of expanding a fixing bolt is realized; and meanwhile, a barb is formed after the open piece is expanded, the removal and drop difficulty is increased, and the loading force and reliability are improved.

Description

A kind of fastening type EXPANSION ANCHOR BOLTS

Technical field

The present invention relates to a kind of EXPANSION ANCHOR BOLTS, specifically a kind of fastening type EXPANSION ANCHOR BOLTS.

Background technique

Existing EXPANSION ANCHOR BOLTS is comprised of countersunk screw, expand tube, plain washer, spring pad and hexagon nut.Setscrew is fixedly to be to utilize the wedge shape gradient to impel expansion to produce the friction bond stress, reaches fixed effect.One of countersunk screw is screw thread, and one has tapering.Outer bread one expand tube, half has some otch expand tube, they are filled in the hole of accomplishing fluently on the wall together, then split nut, nut pulls outward screw, and tapering is drawn in expand tube, and expand tube is by spreading, so tightly fixing on the wall, generally be used for fastening on the materials such as cement, brick such as protective grating, rain cover, air-conditioning.But its is fixing very unreliable, if load has than big bang, may get loose, and does not therefore recommend for ceiling fan etc. is installed.

Summary of the invention

The object of the present invention is to provide a kind of fastening type EXPANSION ANCHOR BOLTS, solve the drawback of common EXPANSION ANCHOR BOLTS slippage, landing, make stronger the fixing of bolt, and simple in structure, cheap.

The present invention solves the technological scheme that its technical problem takes: a kind of fastening type EXPANSION ANCHOR BOLTS, and its structure comprises bolt and expansion tube, cover has two pipes on the described bolt shank, one is expansion tube, the one end has opening slot, forms opening sheet, and another is taper pipe; Described expansion tube left end carries out axially locating by the nut of bolt, the expansion tube right-hand member has the opening sheet of five equilibrium, screw rod is provided with outside thread, the screw rod right part is passed expansion tube and taper pipe successively, there is a tapering described taper pipe left part, the taper pipe right part is provided with a pad, and the end face of pad contacts with the resilient pad left side with the taper pipe right side respectively; Resilient pad is by nut support, and nut and bolt are threaded connection.

The invention has the beneficial effects as follows: the opening sheet direction of the expansion tube of this fastening type EXPANSION ANCHOR BOLTS is away from nut, during work, the tapered region extrusion expansion pipe of taper pipe, the opening sheet radius of expansion tube is increased, play the effect of expansion fixing bolt, simultaneously, a kind of hangnail that forms after opening sheet expands, increase the difficulty of pulling out, coming off, increased bearing capacity and reliability.

Description of drawings

Fig. 1 is structural representation of the present invention;

Fig. 2 is main diagram of the present invention;

Among the figure: 1 bolt, 2 expansion tubes, 3 opening sheets, 4 taper pipes, 5 pads, 6 resilient pads, 7 nuts.

Embodiment

As shown in the figure.A kind of fastening type EXPANSION ANCHOR BOLTS, it comprises bolt 1 and expansion tube 2, and cover has two pipes on the described bolt shank, and one is expansion tube, and the one end has opening slot, forms opening sheet, and another is taper pipe; Described expansion tube 2 left ends carry out axially locating admittedly by the nut of bolt 1, expansion tube 2 right-hand members have the opening sheet 3 of five equilibrium, screw rod 1 is provided with outside thread, screw rod 1 right part is passed expansion tube 2 and taper pipe 4 successively, there is a tapering taper pipe 4 left parts, and the left end radius of taper pipe 4 is equal to or slightly less than expansion tube 2 right side internal diameters; There is a pad 5 taper pipe 4 right parts, and the end face of pad 5 contacts with resilient pad 6 left sides with taper pipe 4 right sides respectively, and area of contact is respectively greater than the area of taper pipe 4 right sides and resilient pad 6 left sides; Resilient pad 6 is supported by nut 7, and nut 7 is threaded connection with bolt 1.And then increase frictional force between this EXPANSION ANCHOR BOLTS and hole.

During work, when nut 7 and bolt 1 combination, and during precession left, taper pipe 4 is advanced left by pad 5, taper pipe 4 left end tapered region are clamp-oned opening sheet 3 internal diameters, along with increasing that taper pipe 4 is clamp-oned left, opening sheet 3 radiuses increase, play the effect of expansion fixing bolt 1, a kind of hangnail that forms after opening sheet 3 expands, bolt 1 drives expansion tube 2 and moves right, and the reversed acanthoid opening sheet 3 on the expansion tube 2 thrusts in the hole wall, make bolt can not continue to move right, form the strong bonded in EXPANSION ANCHOR BOLTS and hole.

Claims

1. a fastening type EXPANSION ANCHOR BOLTS comprises bolt and expansion tube, it is characterized in that, cover has two pipes on the described bolt shank, and one is expansion tube, and the one end has opening slot, forms opening sheet, and another is taper pipe; Described expansion tube left end carries out axially locating by the nut of bolt, the expansion tube right-hand member has the opening sheet of five equilibrium, screw rod is provided with outside thread, the screw rod right part is passed expansion tube and taper pipe successively, there is a tapering described taper pipe left part, the taper pipe right part is provided with a pad, and the end face of pad contacts with the resilient pad left side with the taper pipe right side respectively; Resilient pad is by nut support, and nut and bolt are threaded connection.