CN2168979Y

CN2168979Y - Expansive bolt

Info

Publication number: CN2168979Y
Application number: CN 93221094
Authority: CN
Inventors: 曾景霖
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-08-08
Filing date: 1993-08-08
Publication date: 1994-06-15
Anticipated expiration: 2003-08-08

Abstract

The utility model provides a full dose expansive bolt, which is provided with a cone at the end of an expansive bolt on the basis of the existing expansion bolt. The connecting point between the cone and the expansive bolt is provided with an interim arc. An expansive sleeve is provided with arc flange. The arc flange is contacted with the interim arc in normal state. The utility model can use the existing equipment of producing expansive bolt, and does not need to add any equipment. The materials used are equal to the original expansive bolt; the cost is not increased; the size of each part is same; the quantity of expansion increases to two times; the product property is enhanced. The utility model can meet need of tightening completely.

Description

Expansive bolt

The utility model relates to the device that a kind of fastening or fixed component or machine parts are used, especially a kind of capacity EXPANSION ANCHOR BOLTS.

EXPANSION ANCHOR BOLTS is owing to have function that external diameter can swell, be widely used in construction and decoration, advertisement engineering, and other installing engineering, is used for object is fastened on wall.Traditional expansion bolt has bolt, nut, spring washer, plain washer, the expansion sleeve of cone to assemble by the end, and its specifications at different levels are that whenever to differ 2mm with nominal diameter be one-level, as φ 6mm, φ 8mm, φ 10mm.......The correlation of its each size is as follows:

Nominal diameter=expansion sleeve internal diameter cone Outside diameter=expansion sleeve external diameter

Expansion jacking thickness=(cone Outside diameter-nominal diameter)/2

Back maximum diameter=expansion jacking thickness * 2+ cone Outside diameter swells

The amount of swelling=back maximum diameter-expansion sleeve original outside diameter swells

EXPANSION ANCHOR BOLTS with φ 8mm is an example: cone Outside diameter 10mm expansion sleeve external diameter 10mm, this jacking thickness 1mm, actual size 12mm after expanding, the amount of swelling 2mm accounts for 20% of former expansion sleeve external diameter, in the practical application, the amount of swelling of 2mm is very not enough, because boring on the wall all is manual operations, be difficult to avoid heavy curtain moving, body of wall matrix is different, and the aperture of boring is also inequality, and electric hammer drill was both expensive, rapid wear again, can not diameters at different levels different drill bits is all complete, all is several drill bits that have expansion sleeve external diameter same size commonly used and EXPANSION ANCHOR BOLTS generally, uses to occur following situation often: with φ 10mm bit drills porthole, intend EXPANSION ANCHOR BOLTS with φ 8mm, the gained aperture is 11.5mm, and bolt is packed into after expanding, and still sense is loosening, uses φ 10mm EXPANSION ANCHOR BOLTS again instead, its expansion external diameter is 12mm, can not pack into, use the reaming of φ 12mm drill bit again again, because heavy curtain is moving, the gained aperture is 13.5mm, and loosening sense is arranged again after the bolt of packing into expands.Said circumstances is that this is the deficiency of existing EXPANSION ANCHOR BOLTS because of EXPANSION ANCHOR BOLTS lacks due to enough amounts of swelling.

The design proposal of traditional expansion bolt, increase swell increment and run into following problem: increase swell increment, must increase the Outside diameter of cone, tapering is strengthened, owing to be subjected to the restriction of aforementioned each correlation, expansion jacking thickness also need be thickeied, and promptly Tao materials amount doubles, and cost obviously improves.Pursue the amount of swelling if pass over cost, the circular cone after the expansion sleeve of expecting thick 2mm is made the back and tapering is increased cooperates, and resistance is very big when swelling, thus whole EXPANSION ANCHOR BOLTS in the hole with the spanner rotation and do not expand, be difficult to application.

The purpose of this utility model provides and a kind ofly equates with the traditional expansion bolt materials that each size equates, and the amount of swelling exceeds the capacity EXPANSION ANCHOR BOLTS more than 1 times.

The utility model is provided with bolt, nut, the packing ring of cone, the expansion sleeve that is provided with the arc flange etc. by the end and forms.

Further describe below in conjunction with accompanying drawing.

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model A-A ' face sectional view.

Fig. 3 is the utility model B-B ' face sectional view.

This capacity EXPANSION ANCHOR BOLTS is combined by bolt (1), nut (2), spring washer (3), plain washer (4), expansion sleeve (5), and outward appearance and existing EXPANSION ANCHOR BOLTS are basic identical.Its major character is to be provided with cone (9) in bolt (1) end, cone (9) is provided with-transition arcs (10) with bolt (1) connecting part, on expansion sleeve (5), with transition arcs (10) corresponding section, be provided with the uniform arc flange (8) of five equilibrium, arc flange (8) contacts with transition arcs (10) during normality, the effect of transition arcs (10) is to abdicate certain spatial position, to hold arc flange (8), the orthographic projection of arc flange (8) can be a circle or non-circular, also tapered flanges, can be that the uniform or non-five equilibrium of five equilibrium is laid, the effect of arc flange (8) be the local material thickness that increases expansion sleeve (5).The cone of establishing on the bolt (1) (9) and the joint of bolt (1) can be that arc-shaped transition connects, and also tapering connects or connects with step.The configuration of halving hole (6), five equilibrium groove (7) is all identical with existing EXPANSION ANCHOR BOLTS, effect is to reduce expansion resistance, expansion sleeve (5) can be swollen by five equilibrium, jacking thickness * 2+ cone Outside diameter because expansion back maximum diameter equals to expand, so, because the thickness reality at the existence of arc flange, this place of expansion sleeve has reached the thick and arc flange height sum of raw material.Bolt with φ 8mm is an example, establishes cone (9) Outside diameter 10mm, and the external diameter of expansion sleeve (5) is 10mm, the height 1.5mm of arc flange (8), size after then expanding is that 10+1.5 * 2+1 * 2=15(mm), the amount of swelling is 5mm, accounts for 50% of former expansion sleeve external diameter 10mm.Turn nut (2), bolt (1) is twitched does straight-line displacement, cone (9) progresses into expansion sleeve (5), extruding arc flange (8) swells gradually, because the arch cambered surface of arc flange (8) has the good mechanical performance, so can when being subjected to cone (9) extruding, not flatten, in actual applications, need not the big amount of swelling like this and promptly satisfy the demand.Because the tapering of cone (9) cooperates with arc flange (8) and can produce the maximum swelling amount with interior various sizes, so the capacity EXPANSION ANCHOR BOLTS must adapt to also and can be fastened in the hole firmly using the porthole that gets out with the isometrical drill bit of its expansion sleeve.For example use φ 10mm bit drills porthole, because heavy curtain is moving, drill bit has bending slightly, the aperture that gets out is 12mm, capacity EXPANSION ANCHOR BOLTS with φ 8mm is packed into, and its expansion sleeve external diameter is 10mm, and the amount of swelling is 5mm, begin to prop up hole wall when expanding to φ 12mm, the amount of swelling of remaining 3mm is enough to make bolt to be fastened in the hole firmly.Except that the enough fastening needs amount of being full of, still allow some leeway.

The production of this capacity EXPANSION ANCHOR BOLTS can be used the equipment that has the production EXPANSION ANCHOR BOLTS now, need not increase any equipment newly, and materials equate that with former EXPANSION ANCHOR BOLTS do not increase cost, each one is measure-alike, and the amount of swelling can exceed one times, and product performance are improved greatly.

Claims

1, a kind of capacity EXPANSION ANCHOR BOLTS, assemble by bolt (1), nut (2), spring washer (3), plain washer (4), expansion sleeve (5), it is characterized in that: be provided with cone (9) in the end of bolt (1), cone (9) is provided with transition arcs (10) with the joint of bolt (1), go up and transition arcs (10) corresponding section is provided with arc flange (8) at expansion sleeve (5), arc flange (8) contacts with transition arcs (10) under the normality.

2, capacity EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that: the orthographic projection of the arc flange of establishing on the expansion sleeve (5) (8) can be a circle or non-circular, also can be tapered flanges, and this flange can be that the uniform or non-five equilibrium of five equilibrium is laid.

3, capacity EXPANSION ANCHOR BOLTS as claimed in claim 1 is characterized in that: cone of establishing on the bolt (1) (9) and bolt (1) joint can be that arc-shaped transition connects, and also can be that tapering connects or connects with step.