CN201554737U - Internal fastening-type orientation screw - Google Patents

Abstract

The utility model provides an internal fastening-type orientation screw, belongs to the field of fastening pieces, and solves the problem that when the conventional screw is to be fastened, a fastening tool and the head of the screw can not be matched with each other tightly, so that the screw cannot conduct orientation and positioning accurately. The internal fastening-type orientation screw comprises a screw head and a screw body which are fixedly connected with each other into a whole body; the screw head is arranged at one end of the screw body, and a screw point is arranged at the other end thereof; and threads are formed on the surface of the screw body. The orientation screw is characterized in that an insertion hole is formed on the screw head; the middle part of the insertion hole takes the shape of a conical tenon hole which becomes larger gradually from the groove bottom to the groove mouth; and a plurality of bayonets which diffuse taking the conical tenon hole as the center of a circle are formed at the periphery of the insertion hole. When the screw with the insertion hole structure is coupled with the fastening tool, not only can the screw and the fastening tool be matched with each other tightly, but also the rotation central line of the fastening tool is in complete accordance with the longitudinal axis of the screw, so that the forward motion direction of the screw can be completely controlled by an operator holding the fastening tool, and the orientation purpose can be achieved.

Description

A kind of internal tension directional bolt

Technical field

The utility model relates to a kind of screw, particularly relates to a kind of internal tension directional bolt, belongs to fastener areas.

Background technique

Screw is a kind of fastening piece commonly used, and its kind is a lot, as screw assemblies, tapping screw (as coiled hair self tapping, countersunk head self tapping, big homalocephalus self tapping etc.), self tapping self-drilling screw etc.All have on the ailhead of most of screw and be a word, cross or hexagonal socket, this socket is used for plugging with the cutter head of electric screw driver, thereby carries out fastening or disassembling section.

But in fastening process, because it is unreliable that the socket of screw and driver bit are pegged graft, a hand will be held screw-driver during operation, the socket of driver bit and screw is plugged, and the another hand also need buttress the part of close screw on the fastened tools, and not so screw will rock in rotation process, particularly when just beginning to rotate, the power that acts on the screw can not be excessive, can be more severe otherwise rock, even cause and can't operate; In addition, plug fast for the ease of screw and driver bit, between the notch inwall of screw and driver bit, leave certain clearance, but in use, because this gap causes the longitudinal axis of screw and the longitudinal axis of driver bit to be difficult to be consistent, also just can't make screw in traveling process perpendicular to workpiece surface, the phenomenon that trains off promptly appears, this be connected and fixed on the construction timber shutterings particularly outstanding, and can make the screw bending, cause and scrap, the workpiece of required connection is damaged, influence appearance quality; In addition, the socket of screw is less, particularly in construction engineering, be easy to be blocked, cause driver bit to insert, thereby can't utilize driver bit that it is disassembled in good condition by foreign matters such as concrete, if, can cause the damage of screw and workpiece equally by dismounting by force.

Summary of the invention

The purpose of this utility model is to have the problem that screw exists now in order to overcome, and provides a kind of jack of screw and fastened tools of making to closely cooperate, thereby controls the internal tension directional bolt that is screwed into direction of screw better.

The purpose of this utility model can realize by following technical proposal: a kind of internal tension directional bolt, comprise the ailhead and the nail body that are solidly fixed, ailhead is positioned at an end of nail body, the other end of nail body has the nail point, surface at the nail body has screw thread, it is characterized in that, has jack on the described ailhead, the middle part of described jack is bottom land towards the gradually big conical mortise of notch direction, is the bayonet socket that disperse towards periphery in the center of circle at the periphery of jack for several centers with conical mortise.

This internal tension directional bolt has the jack of being made up of the conical mortise that is positioned at the center and several bayonet sockets that are positioned at periphery on ailhead, conical mortise easily makes the head of fastened tools insert fast, and each bayonet socket has circumferential positioning action.In reality during fastening or disassembling section, need to adopt supporting fastened tools to finish, promptly the fastened tools that is adopted need have the connection-peg that matches with jack, this connection-peg is made up of center cone bar and several card articles that are distributed in the awl rod outer surface, the awl pole pair is answered conical mortise, the corresponding bayonet socket of card article utilizes card article and cooperating of bayonet socket to realize circumferential positioning action, guarantees that screw is along with fastened tools rotates synchronously.

In above-mentioned internal tension directional bolt, the tapering of described conical mortise is 3 °～16 °.The tapering of mortise is little, and it is firm to help making it to be connected with fastened tools.

In above-mentioned internal tension directional bolt, the degree of depth of described conical mortise is greater than 2 millimeters.The actual grade of mortise depends on the thickness of ailhead, the each side factors such as intensity of the antitorque tension of neck, it is good getting maximum value, but in general must be greater than 2 millimeters (thickness of ailhead is generally all greater than 2 millimeters), the mortise that the degree of depth is big helps making it to cooperate closely with fastened tools, prevents to occur rocking in the process of being screwed into.

In above-mentioned internal tension directional bolt, the degree of depth of described conical mortise is 1 times-2 times of the degree of depth of bayonet socket.Be the degree of depth of the degree of depth of conical mortise, and the degree of depth of bayonet socket generally is no more than the thickness of ailhead, thereby conical mortise is deep in the nail body, help making screw reliably to be connected with fastened tools greater than bayonet socket.

In above-mentioned internal tension directional bolt, the width ecto-entad of described bayonet socket dwindles gradually.This bayonet socket not only can form coupling of cumulative pressure with fastened tools, area of contact between ailhead and the fastened tools is increased, make the torsion transmission more evenly, reliably, and the wearing and tearing between minimizing screw and the fastened tools, thereby increase the service life, simultaneously this bayonet socket and the directing effect that can also further promote after fastened tools cooperates to screw.

In above-mentioned internal tension directional bolt, the quantity of described bayonet socket is 2-6.The quantity of bayonet socket can be determined according to the diameter and the manufacturing complexity of ailhead.

In above-mentioned internal tension directional bolt, described ailhead is the round platform of outwards being expanded gradually by the nail body.When fastening screw trip bolt, help ailhead is screwed in the workpiece fully, promptly make exterior edge face and workpiece surperficial equal of ailhead, thereby prevent from when outside this workpiece, other workpiece being installed, to be subjected to being exposed at the interference of the ailhead outside the workpiece.

In above-mentioned internal tension directional bolt, the surface of described nail body also has by the nail point along the axially extended cutting edge of nail body.Cutting edge has been arranged, the frictional force in the time of can reducing screw and enter workpiece.

In above-mentioned internal tension directional bolt, the double blade that described cutting edge is made up of two crossing sword faces.Can further reduce surface friction drag with workpiece.

In above-mentioned internal tension directional bolt, the angle between two sword faces of described double blade is less than 90 °.Can reduce destructiveness, have certain join strength between assurance and the workpiece workpiece.

Compared with prior art, have the jack of forming by conical mortise that is positioned at the middle part and the bayonet socket that is positioned at periphery on the ailhead of this internal tension directional bolt, and mortise has certain degree of depth and less tapering, when the screw with this jack structure and fastened tools couple, both are cooperated closely, the longitudinal axis that can also guarantee the rotary centerline of fastened tools and screw is in full accord, even external force is arranged when the longitudinal axis perpendicular to screw acts on the screw, can not make yet and produce a bit rocking between the two, the direction that screw advances on top of the operator who holds fastened tools on hand, thereby reach directed purpose, the raising operating efficiency is highly advantageous to, make each screw bring into play due usefulness, in addition, the width ecto-entad of bayonet socket dwindles gradually, can increase the area of contact between ailhead and the fastened tools, make that the torsion transmission is more even, reliably, and the wearing and tearing between minimizing screw and the fastened tools, thereby increase the service life, simultaneously this bayonet socket and the directing effect that can also further promote after fastened tools cooperates to screw; Particularly in the construction field of construction timber shutterings, not only can avoid because of training off the bending that causes screw even scrapping, thereby improve the reusable number of times of screw, can also reduce damage to timber formwork as far as possible, in addition, the degree of depth of mortise is big and be conical, is difficult for being blocked by foreign matters such as concrete, is convenient to normal loading and unloading.

Description of drawings

Fig. 1 is the perspective view of the utility model internal tension directional bolt;

Fig. 2 is that the B of Fig. 3 is to structural representation;

Fig. 3 is the A-A sectional structure schematic representation of Fig. 2;

Fig. 4 is the cutting edge cross-sectional schematic of the utility model internal tension directional bolt.

Among the figure, 1 ailhead; The conical mortise of 1a; The 1b bayonet socket; 2 nail bodies; 2a follows closely point; The 2b cutting edge; 3 screw threads; The α tapering; Angle between the β double blade; The degree of depth of the conical mortise of B; The degree of depth of C bayonet socket; The width of D bayonet socket.

Embodiment

Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.

As shown in Figure 1, this internal tension directional bolt comprises ailhead 1 and the nail body 2 that is solidly fixed, ailhead 1 is positioned at an end of nail body 2, the other end of nail body 2 has the sharp 2a of nail, surface at nail body 2 has screw thread 3, screw thread can be around whole nail body, also can be around the part of nail body, screw thread 3 shown in the figure is by the middle part of the sharp 2a of nail around to nail body 2, if with screw when being connected and fixed wood materials and using, can make the pitch of screw thread wideer, the degree of depth is big, makes this screw become a kind of wood screw; On the contrary, if with screw when being connected and fixed metallic material and using, can make the pitch of screw thread narrower relatively, the degree of depth is smaller, and the nail point of flat is set, and makes this screw become a kind of self tapping self-drilling screw; Having by being positioned at the middle part and being bottom land on the ailhead 1 is the jack that the bayonet socket 1b that disperses towards periphery in the center of circle forms towards the gradually big conical mortise 1a of notch direction and 3 centers with conical mortise 1a being positioned at periphery, as shown in Figure 3, the tapering α of conical mortise 1a is less, generally be selected between 3 °～16 °, the depth B of conical mortise needs the thickness according to ailhead 1, the each side factors such as intensity of the antitorque tension of neck are determined, it is good getting maximum value, but in general must be greater than 2 millimeters (thickness of ailhead is generally all greater than 2 millimeters), the degree of depth C of bayonet socket generally is no more than the thickness of ailhead, but because conical mortise 1a is positioned at the middle part of each bayonet socket 1b, therefore can be deep in the less nail body 2 of diameter, in general, the depth B of getting conical mortise is between 1 times-2 times of degree of depth C of bayonet socket, known to Fig. 2, the width D ecto-entad of bayonet socket dwindles gradually, the distance that the past periphery of bayonet socket distributes is with the nominal diameter size variation in direct ratio of ailhead 1, it is constant that the size of tapering should keep, and with the quantity of bayonet socket, factor such as the width and the degree of depth is irrelevant.

Certainly, the quantity of bayonet socket 1b can be determined according to the nominal diameter size and the manufacturing complexity of ailhead 1, generally gets 2-6, but takes all factors into consideration, and gets 3 the bests.

In order to make screw when not allowing ailhead to expose to use in the occasion of workpiece surface, ailhead 1 can be made the round platform of outwards expanding gradually by nail body 2, it is flare, when the workpiece of required connection is soft material such as plank, can directly ailhead be screwed in the plank, when if the workpiece of required connection is hard material such as iron plate, need on iron plate, to process the hole with tapering of matching earlier with this ailhead, just can be screwed into the ailhead of screw fully.And when allowing ailhead to expose to use under the occasion of workpiece surface, can make outer-hexagonal head, the first-class capitiform of semicircle to ailhead.

In order to accelerate the speed that screw enters workpiece, as shown in Figure 1 and Figure 4, also have on the surface of nail body 2 by the sharp 2a of nail along the nail axon to the double blade that extends and form by two crossing sword faces, the outer side of each sword face is the cutting edge 2b with shear action, in order to guarantee the join strength of screw and workpiece, should make two angle β between the sword face less than 90 °.

This screw needs and the supporting use of the fastened tools of special use, if adopt electric drill as fastened tools, the conical driver bit that is that electric drill is had match with mortise, and outside driver bit, have, a size corresponding card article identical with bayonet socket quantity, when screw and driver bit couple, conical driver bit and mortise and card article and bayonet socket fit like a glove, and transmit reliably, are easy to make the screw orientation to enter workpiece; When reality is made, should make the structure of driver bit, size consistent with the drift of the cold pier mould of producing this screw, so just can guarantee drive fit between the two.In addition, also can on driver bit, set up magnetic rings, when screw contacts with the screw-driver that has magnetic is first, just can tightly be adsorbed on the driver bit, when the power that acts on the screw is big more, their connection is just reliable more, make that the rotary centerline of the longitudinal axis of screw and fastened tools is in full accord, like this, the screw-in direction of screw on top of in operator's hand, thereby reach the purpose of directed fastening screw trip bolt.

Claims (10)

1. internal tension directional bolt, comprise the ailhead (1) and the nail body (2) that are solidly fixed, ailhead (1) is positioned at an end of nail body (2), the other end of nail body (2) has nail point (2a), surface at nail body (2) has screw thread (3), it is characterized in that, described ailhead has jack on (1), the middle part of described jack is bottom land towards the gradually big conical mortise (1a) of notch direction, is the bayonet socket (1b) that disperse towards periphery in the center of circle at the periphery of jack for several centers with conical mortise (1a).

2. internal tension directional bolt according to claim 1 is characterized in that, the tapering (α) of described conical mortise (1a) is 3 °～16 °.

3. internal tension directional bolt according to claim 1 is characterized in that, the degree of depth of described conical mortise (B) is greater than 2 millimeters.

4. internal tension directional bolt according to claim 3 is characterized in that, the degree of depth of described conical mortise (B) is 1 times-2 times of the degree of depth (C) of bayonet socket.

5. internal tension directional bolt according to claim 4 is characterized in that, the width of described bayonet socket (D) ecto-entad dwindles gradually.

6. internal tension directional bolt according to claim 5 is characterized in that, the quantity of described bayonet socket (1b) is 2-6.

7. according to arbitrary described internal tension directional bolt of claim 1 to 6, it is characterized in that described ailhead (1) is the round platform of outwards being expanded gradually by nail body (2).

8. internal tension directional bolt according to claim 7 is characterized in that, the surface of described nail body (2) also has by nail point (2a) along the nail axially extended cutting edge of body (2b).

9. internal tension directional bolt according to claim 8 is characterized in that, the double blade that described cutting edge (2b) is made up of two crossing sword faces.

10. internal tension directional bolt according to claim 9 is characterized in that, the angle (β) between two sword faces of described double blade is less than 90 °.

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