CN2089545U

CN2089545U - Imbedding expanding nut

Info

Publication number: CN2089545U
Application number: CN 90226655
Authority: CN
Inventors: 张文正
Original assignee: XU ZU EN
Current assignee: XU ZU EN
Priority date: 1990-12-28
Filing date: 1990-12-28
Publication date: 1991-11-27

Abstract

The utility model relates to a fixed connecting element, belonging to the field of machinery, in particular to a fastened imbedding expanding nut of the component used for buildings, hardware and decoration operation, comprising a screw nut main body and a taper pin. When the taper pin extends along a conical surface, the side wall of the front end of the expanding screw nut which is pre-embedded in the connecting element is caused to expand in radial direction to realize that the screw nut main body is fastened in the component by the adaptive matching between the taper pin and the inner conical surface of the inner hole of the screw nut main body. The utility model has the advantages of simple structure, labour saving and material saving, and besides, the expanding screw nut can be fastened in the connecting element only by the screw nut and can be widely used for various building elements and connecting elements.

Description

Imbedding expanding nut

The utility model relates to the fixed connection structure spare in the field of mechanical technique, in particular for being fastenedly connected parts between parts and the parts in building, five metals and the decoration operation.

Existing traditional EXPANSION ANCHOR BOLTS is as fixed connecting piece the time, the tension of EXPANSION ANCHOR BOLTS is to be screwed in the nut that is embedded in link in advance by bolt or screw, make and imbed nut and reach radially produce expanding, for example U.S. Pat 2701, " threaded fastener " shown in 398, its structure is seen this paper accompanying drawing 5, wherein, desiring to be fixedly coupled part represents with

symbol

503 and 504 respectively, expanding nut is 501, connecting bolt is 502, before connection, earlier expanding nut 501 is embedded in the mating hole of link 504, another link is placed on the above-mentioned link 504, connecting bolt 502 passes the through hole on the link 503, its front end is threaded in the internal thread of expanding nut 501, along with the precession of bolt 502, owing to have opening slot 506 on the nut 501 anterior sidewalls, institute finally reaches the purpose that

parts

503 and 504 are fastenedly connected so that this part sidewall is done radial expansion (seeing accompanying drawing 5).Structure by the known expanding nut link of accompanying drawing 4 expression another kinds, wherein, connecting bolt 401 is enclosed within the through hole of expanding nut 402, connecting bolt 401 ends of expanding nut 402 and band back draught are placed in the hole 406 of link 405 adaptedly, and a threaded end of connecting bolt 401 stretches out link 405, another link 404 of desiring to be fastened and connected with link 405 is enclosed within the threaded shank end that stretches out outside link 405, then, at this end cover upper gasket and nut 403, usually, along with nut 403 is done clockwise precession, connecting bolt 401 will be done moving of the direction of arrow as shown, the end sidewalls that will have the expanding nut 402 of opening slot (figure does not show) until the back taper end of bolt 401 is done radial expansion, adopts this structure equally also can reach the purpose that

link

404 and 405 is fastenedly connected.But, in the long splice member shown in above-mentioned two kinds of prior arts, mating reaction when realization expansion interconnect function must have two separating components of nuts and bolt (or screw), promptly, by screwing of bolt (or screw), the expanding nut sidewall is expanded, and reach the connection of two links.Its shortcoming is that expanding nut can not be buried underground in advance, and operation is taken a lot of work, and is time-consuming and be fastenedly connected weak effect.

For overcoming above-mentioned shortcoming, the expanding nut that the utility model is designed, do not need the adapted bolt just can realize the fastening of expanding nut self and link, thereby use traditional the EXPANSION ANCHOR BOLTS architecture advances of one with for only need just making the new expansion fastening structure that himself is fastened on link with expanding nut and bolt with expanding nut.Adopt this expanding nut structure when fastening workpiece, its advantage is that owing to adopt the taper pin cooperating structure in nut main body, the nut main body that therefore can not embed in the building body pulls out building piece; Another advantage is, expanding nut can be embedded in the link in advance, and in the building wall, it and link are tightened to one, and can the pre-buried one-tenth of expanding nut do not had the mode of protruding the limit wall as required; Secondly, adopt this expanding nut can be with the standardized bolt of the fastening associated all size of general instrument; At last, expanding nut described in the utility model also has the punching degree of depth with respect to the expanding nut in the prior art and lacks half, and raw material save 40% and safe and reliable, the significant advantage of the big grade of pulling-out force.

The purpose of this utility model is to propose a kind of novel embedded expanding nut structure, adopts the connection internal thread of this expansion of structure nut can adopt the metric system or the inch screw thread of different size as required, therefore, and highly versatile when the adapted connecting bolt.Another purpose is that expanding nut can be embedded in link in advance, for example on the building member, therefore brings convenience to construction.

Be further described below in conjunction with the structure and the working principle of accompanying drawing embedded expanding nut described in the utility model.

Fig. 1 represents the structural representation of expanding nut described in the utility model.

Fig. 2 represents the schematic representation when expanding nut embedding link shown in Figure 1 is fastening.

Fig. 3 represents that expanding nut shown in Figure 2 is used for the structural representation when another link is connected.

Figure 4 and 5 are represented the schematic representation of the EXPANSION ANCHOR BOLTS structure that adopted in two kinds of prior arts respectively.

Referring to Fig. 1, imbedding expanding nut described in the utility model, Zhu will comprise: nut main body 1, Zhui pin 2, described nut main body 1 is cylindrical, wherein the heart has through hole, and the front end of this through hole is the Zhui degree of θ with angle, is the Zhi hole between Zhong, and the rear end is with the internal thread 5 of common-use size, the front end lateral wall of Zai nut main body 1 has annular knurl 6, and the top of front end is positioning step 4, it when Yong is mating hole for expansion nut Zai built-in connector, be used as the location. On the front end side wall of Zai nut main body 1 with open slot 3, so that being radially expanded of this partial sidewall. Described Zhui pin 2 is solid cylindrical, the one end is the Zhui degree of θ with cone angle also, and the other end is cylindrical body, and its external diameter is Yu the through hole of nut main body 1 is adaptive, pin 2 can be put into the through hole of nut main body 1, make it with Zhui degree one end Yu the front end band Zhui degree of nut main body 1 in The hole is suitable.

During the actual use of Zai expansion nut described in the utility model, referring to accompanying drawing 2, earlier nut main body 1 is put into connector adaptedly, the mating hole Zhong that for example Yu accomplishes fluently earlier on the building member, make with an end of the nut main body 1 of internal thread 5 outwardly, and extend into mating hole Zhong with an end of positioning step 4, then Zhui pin 2 is put in the rear stomidium of nut main body 1 by illustrated direction, after the Zhi, can the suitable mast 203 of Yong stretch into the rear end of knocking Zhui pin 2 in the hole, Zhui pin 2 is put in to the endoporus front end with the Zhui degree. The front-end-cone degree of You Yu Zhui pin 2 is Yu the Zhui degree of endoporus front end is adaptive, its cone angle is the θ angle, so along with constantly putting in forward of Zhui pin 2, impel the front end side wall of nut main body 1 to be radially expanded, being provided with of open slot 3 is beneficial to being radially expanded of sidewall, and the sidewall that the annular knurl 6 that the front end outer wall of Zai nut main body 1 arranges is radially expanded You Zhu Yu is Yu connector is more firmly fastening. Adopt above-mentioned operation, Zui Zhong makes expansion nut Zi body securely, and Yu is embedded in earlier on the diverse location of required connecting elements (referring to Fig. 2). Accompanying drawing 3 expressions utilize the embedding expansion nut Yong Yu of Yu elder generation to connect the connection diagram of 303 of another structural members. Namely utilize the adaptive general bolt 304 of internal thread of Yu nut main body 1, pass another connecting elements that need connect 303, be screwed into then on expansion nut Zhu body 1 internal thread that Yu buries, tighten, thereby realize that connecting elements 302 is Yu being fastenedly connected between Zhi 303.

The utility model most preferred embodiment is summarized as follows,

Expanding nut 1 available material is engineering plastics, for example: ABS plastic, nylon etc., various metallic material, for example: stainless steel, the High Strength Steel of the various trades mark.The nut outer diameter D, the positioning step outer diameter D ₁, D ₁=(0.7-0.9) D, nut length is L, reach GL, the cone angle of front end inner cone are the θ angle, and tapering length is HL, wherein, GL=(0.3-0.4) L, HL=(0.3-0.4) L, θ=(2-30) °, nut front end outer surface has common twill annular knurl, and the annular knurl height is 1/2 of a nut length L usually.Taper pin is selected the material same with nut for use, and the internal orifice dimension of its cylinder external diameter and nut is suitable, promptly is slightly smaller than the endoporus aperture, and the tapering of front end cone and nut inner taper are adaptive, and taper angle is the θ angle, and the height of tapering is 1/2 of a cone height.The diameter D of nut main body can select φ 4 for use, and φ 5, and φ 8, and φ 10, and φ 12, and φ 16, and φ 20, and φ 25 its corresponding internal threads 5 can be respectively M3, M4, and M6, M8, M10, M12, M16, the metric thread of M20, and select corresponding connecting bolt for use.

Use expanding nut of the present utility model to be embedded in the cement wall, measure the value of marking of expression expanding nut intensity, lateral load, screw-down torque and basic strength are as follows respectively:

Model drawing out value E lateral load Q screw-down torque MT

Basis strength 52N/mm 15N/mm NM

HKPM6 cement 14.4KN 7.6KN 5

HKPM8 cement 19.9KN 11.1KN 11

HKPM10 cement 24.1KN 15.9KN 22

HKPM12 cement 44.9KN 26.9KN 37

HKPM16 cement 72.4KN 45.8KN 80

HKPM20 cement 104.9KN 71.2KN 160

Wherein: 1kg=9.8N(N is a Newton force)

Annotate, the designed expanding nut of the utility model is using 500-600N/mm ²Bolt the time its screw-down torque remain within the safe operating conditions limit.

Have Yu Zhong the actual use of the expansion nut Zai that the utility model proposes and embed, tightness is good, has higher pulling-out force, the saving of labor, material-saving, the safe and reliable remarkable advantage that waits can be widely used in building, Zhuan Huang, the five metals technical field also can be used for daily life Zhong Zuo for connecting securing member.

Claims

1, a kind of embedded expanding nut that is used for structure member connection usefulness, it is characterized in that, described expanding nut mainly comprises nut main body, taper pin, wherein, described nut main body is cylindrical, and its center has through hole, the front end of this through hole has the tapering that angle is θ, and the rear end has internal thread, on the front end sidewall of nut main body opening slot is set, and the top of front end has positioning step, described taper pin is solid cylindrical, the one end also has the tapering that cone angle is θ, and the other end is cylindrical body, and the through hole of its external diameter and nut main body is suitable, taper pin can be put into through hole, and the taper position in the taper of its front end and the nut main body through hole is suitable.

2, expanding nut as claimed in claim 1 is characterized in that, has the annular knurl decorative pattern on the front end outer side surface of described nut main body, and the decorative pattern height is 1/2 of a nut main body length L.

3, expanding nut as claimed in claim 1 is characterized in that, described taper angle theta=2 °-30 °, nut main body outer diameter D, positioning step outer diameter D ₁, D ₁=(0.7-0.9) D, nut main body length is L, and reach is GL, and hole taper length is HL, and its pass is:

GL＝（0.3－0.4）L， HL＝（0.3－0.4）L。

4, expanding nut as claimed in claim 1 is characterized in that described nut main body and taper pin all use same material, as: stainless steel, ferrous metal becomes nylon material.