CN2371384Y

CN2371384Y - Motion load-carrying expansion bolt

Info

Publication number: CN2371384Y
Application number: CN 99204616
Authority: CN
Inventors: 谈建民
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-02-10
Filing date: 1999-02-10
Publication date: 2000-03-29
Anticipated expiration: 2009-02-10

Abstract

The utility model provides a movable load bearing expansion screw bolt which mainly solves the problems of heavy load bearing, vibration load, and compensation for the nonuniform stress on buildings or structures after concrete, brick walls, etc. are drilled by electric hammers, etc. The utility model is characterized in that two sections of expansion pipes are provided with equant opening slots, the inner wall of one opening end of each expansion pipes is a tapered wedge surface, and is correspondingly matched with a tapered body structure on the outer wall of one end of each of an adjusting supporting expansion nut and a movable load loading supporting expansion nut. The adjusting supporting expansion nut and the movable load loading supporting expansion nut are connected with a stud through screw threads, and a gasket and a nut are added. The outer end of the stud is provided with a transmission connecting shape surface to control the rotation of the stud. The structure is tightly expanded by a fore wedging expansion pipe and a rear wedging expansion pipe. The adjusting supporting expanson nut and the movable load bearing supporting expansion nut are stressed synchronously, and the stress is uniform, safe and reliable. The exposed part of the stud can adjust the thickness of a connecting element, and a stud which is tightly fixed in a building can be detached.

Description

Moving carrying EXPANSION ANCHOR BOLTS

The utility model relates to a kind of moving carrying expansion steel bolt.In prior art, general EXPANSION ANCHOR BOLTS is made up of expansion tube, bolt, packing ring and nut.At the tapered body of the head of bolt, the other end has screw thread, metal expansion pipe one end of opening slot, and the taper facing to bolt is enclosed within the bolt, and nut is spun on the bolt.During use, screw nut and make the opening slot of EXPANSION ANCHOR BOLTS head and the hole swelling of building coupling, but because bolt head cone and expansion tube face are limited to a circle, stress surface is little, and it is inhomogeneous, moreover, since expansion tube only an end be subjected to expansive force, the other end is by by the moment of the radial force of firm thing to the expansive force end, comprise because vibration of building, be subjected to this moment to shaking repeatedly that the expansive force end produces, expansion tube is deflected down, make fastening safety reliability be subjected to influence.When fastening need the dismounting, the bolt of this structure is not detachable, and can only give prominence to architectural plane.

The purpose of this utility model is to provide a kind of moving carrying and the heavy EXPANSION ANCHOR BOLTS of carrying, and regulates the length that exposes to the bolt on the architectural plane within the specific limits, also can draw off the bolt on building.

The utility model is made up of two groups of metal expansion pipes and holder expansion nut, bolt, packing ring and standard nut, and it is characterized in that: double-screw bolt is a stud, wherein outer end band transmission joint shape face; The front and back equidirectional expansion tube of two joints all has the opening slot of five equilibrium respectively, and an end inwall of its opening is tapered wedge surface; Regulate the holder expansion nut and match with the corresponding coupling in tapered wedge surface front and back of two joint expansion tubes, form two groups of moving carrying expansion structures with moving carrying holder expansion nut; Adjusting holder expansion nut asks expansion nut to seize expansion tube respectively on both sides by the arms with moving carrying and the double-screw bolt screw thread spins, and the packing ring and the nut of wedging expansive force are provided.

The moving carrying EXPANSION ANCHOR BOLTS that the utility model provides is rotated by nut, wedging power is provided, the opening slot of two holders expansion nuts and two expansion tubes is relatively shunk move, and the conical surface that mate on the edge wedges expansion tube, finally make on two groups of synchronous swelling buildings of expansion tube in the hole with its coupling.Acting in conjunction owing to two groups of expansion tubes and cone structure thereof, the stress surface that makes expansion tube increases than original EXPANSION ANCHOR BOLTS and is twice abovely, and pressure is little, and brick wall is not fragile relatively, the artificial safety factor of concrete structure can reduce greatly, thereby has reduced the structural material cost.With regard to the effect of EXPANSION ANCHOR BOLTS itself, prior, also be most critical be that second group of expansion tube can play more effective fixation, make the EXPANSION ANCHOR BOLTS in the buildings such as being connected in concrete or brick wall play the special effect of heavily carrying and shaking load.The transmission joint of double-screw bolt outer end is in the shape face, the rotation of both available external force control double-screw bolt, rotates synchronously to prevent double-screw bolt and nut, can rotate the length that exposes with the adjustment double-screw bolt again separately.When fastening point is removed, can also draw off double-screw bolt fully easily.

Below in conjunction with the embodiments concrete structure of the present utility model is further described again with accompanying drawing:

The half sectional view of the moving carrying EXPANSION ANCHOR BOLTS that Fig. 1 provides for model utility.

Fig. 2 is the plan view of the expansion tube among Fig. 1.

Fig. 3 is the right elevation of Fig. 2.

As shown in Figure 1, EXPANSION ANCHOR BOLTS is by stud 7, expansion tube 2,4, regulate holder expansion nut 1, moving carrying holder expansion nut 3, packing ring 5 and standard nut 6 are formed, the transmission joint shape face of double-screw bolt outer end is a word and cross turn screw groove, or double-screw bolt the outer end flat gesture or the polygon structure that are.Regulate holder expansion nut 1 and be screwed on the double-screw bolt 7, regulating the holder expansion nut has big chamfering, is beneficial to play the guiding role when whole EXPANSION ANCHOR BOLTS is filled in inflation port easily smoothly; The opening slot of expansion tube 2 is inserted on the double-screw bolt 6 facing to regulating holder expansion nut 1, the corresponding coupling of tapered wedge surface kissing with adjusting holder expansion nut: moving carrying holder expansion nut 3 spins on the double-screw bolt 7, sort the 3rd, the corresponding coupling of the opening slot kissing of its tapered wedge surface and expansion tube 4 adds packing ring 5 and standard nut 6 again.Two expansion tubes 2,4 all have the opening slot of the trisection done, and every end forms three bloated pieces.Every bloated piece one side is tapered, makes the stress surface of expansion tube bigger; Each opening slot bottom can link to each other with a circular hole, to disperse the stress of bloated piece.This structure EXPANSION ANCHOR BOLTS is a metallic material, and wherein expansion tube adopts tool intensity height, good toughness fine corrosion resistance, the economic stainless steel material of the ferrite of reaching advanced world standards that cost is low; Other component also adopt to have energy-conservation, performance and is equivalent to 45 steel quenched and tempered states and 50 steel quenched and tempered states, and performance evenly, no decarburization, easy to process and the easy cutting middle carbon microalloy pearlitic steel or the economic stainless steel of ferrite of reaching advanced world standards.

Claims

1. moving carrying expansion steel bolt comprises double-screw bolt, expansion tube, adjusting holder expansion nut, moving carrying holder expansion nut, packing ring and standard nut.It is characterized in that: double-screw bolt is stud (7), wherein outer end band transmission joint shape face; The expansion tubes (2) of front and back two joints, the opening slot that (4) all have five equilibrium respectively, an end inwall of its opening is tapered wedge surface; The taper structure of regulating holder expansion nut (1) and moving carrying holder expansion nut (3) one end outer walls matches with the corresponding coupling of tapered wedge surface of two joint expansion tubes respectively; Expansion nut (1) is held in the palm in adjusting and moving carrying holder expansion nut (3) seizes expansion tube on both sides by the arms and the double-screw bolt screw thread spins, and the packing ring (5) and the standard nut (6) of wedging expansive force are provided.

2. moving carrying EXPANSION ANCHOR BOLTS according to claim 1, it is characterized in that: the opening one end inwall of two joint expansion tubes (2), (4) is tapered wedge surface respectively, matches with the corresponding coupling of tapered wedge surface of regulating holder expansion nut (1) and moving carrying holder expansion nut (3) one end outer walls; Regulate holder expansion nut (1) and move carrying holder expansion nut (3) and spin with the double-screw bolt screw thread respectively.

3. EXPANSION ANCHOR BOLTS according to claim 1 is characterized in that: have two joint expansion tubes and adjusting holder expansion nut and moving carrying and ask expansion nut to form two pairs of moving load assemblies that coupling matches.