CN102252011A

CN102252011A - Locking low-resistance screw

Info

Publication number: CN102252011A
Application number: CN2010101919392A
Authority: CN
Inventors: 苏国材
Original assignee: Qingda Technology Co Ltd
Current assignee: Qingda Technology Co Ltd
Priority date: 2010-05-17
Filing date: 2010-05-17
Publication date: 2011-11-23
Anticipated expiration: 2030-05-17
Also published as: CN102252011B

Abstract

The invention discloses a locking low-resistance screw comprising a first screw head, a rod body, a plurality of first screw teeth, a locking part and a plurality of second screw teeth; a plurality of opposite grooves are mounted on the plurality of second screw teeth, and the first tooth peak inclined angle of the plurality of first screw teeth is smaller than the second tooth peak inclined angle of the plurality of second screw teeth. When the locking low-resistance screw is used for locking, the grooves on the second screw teeth effectively assist the first screw teeth in cutting objects and accommodate cuttings, the first screw teeth with the smaller first tooth peak inclined angle can strengthen the drilling stress of the second screw teeth with the larger tooth peak inclined angle, therefore, the cutting ability of the locking low-resistance screw is better improved, and the efficacy of fast locking is achieved.

Description

A kind of sealed lower resistance screw

Technical field

The present invention relates to the screw field, the fast and high-intensity sealed lower resistance screw of particularly a kind of cutting speed.

Background technique

Consult Fig. 1 to Fig. 3, No. 2005/0186048 disclosed screw 1 of patent case of the U.S. includes that the body of rod 12, plural whorl that a spiral shell head 11, extends from this spiral shell head 11 are located at that thread 13 and on this body of rod 12 is located on this body of rod 12 and in contrast to the locking part 14 of this spiral shell head 11; Wherein, offer the otch 131 that plural number links to each other on these threads 13, particularly, a tooth peak angle α (being about 30 degree～35 degree) joins out at the upper and lower tooth peak 132,133 of these threads 13, and be located at 134 formed summits 135, outer tooth peak on this otch 131 apex angle of joining out ' (being about 30 degree～58 degree), and this otch 131 forms a kerf included angle A; So when sealed, this existing screw 1 can utilize the rotary cut function of these otch 131, cut the object effect with what strengthen these threads 13, and then reach the effect of fast locking location.

But, the actual back of using is found, these thread 13 sealed entering in object 2 processes, though the setting of these otch 131 can provide preferable cutting effect, but, the designs such as angular dimension of the tooth peak angle α of the angular dimension of the otch included angle A of these otch 131 and these threads 13 in fact but influence the sealed effect of this screw 1 easily, make a concrete analysis of as follows:

One, at first at the angular dimension of these otch included angle A and discuss:

The cutting power of these threads 13 is subjected to being provided with that angular dimension influences of these otch included angle A and different, also even the angle of these otch included angle A is provided with too small, when then the execution fast locking enters the action of object 2 in these thread 13 working angles, these object 2 fibers are because of having the characteristic of elastic-restoring force, and can't enter one by one among these otch 131, cause these otch 131 that the function of auxiliary this object 2 of rotary cut can't effectively be provided one by one, so the cutting power of these otch 131 is limited, even to no effect, and can't guide this screw 1 to shoot this object 2 really; Otherwise, if this otch angle A is offered excessive, then the size of these threads 13 might reduce relatively, the rotary cut ability of excessive these otch 131 of this otch angle A is not as the less rotary cut ability of this otch angle A on the contrary, and 12 less relatively of threads of this type of size cause bearing the torsion deficiency because of its configuration aspects is weak has the situation that collapses tooth to produce easily, also is worth improving.

Two, the tooth peak angle α at these threads 13 designs and discusses:

The sealed effect of this screw 1 is influenced by the tooth peak angle α design angle size of these threads 13 and difference, also even the tooth peak angle α of these threads 13 is too small, though these threads 13 can have preferable cutting power, but when these threads 13 are met harder object, very easily, cause the fracture easily in sealed process of these threads 13 because of these threads 13 can't bear bigger screw-in torsion; Otherwise, when the tooth peak of these threads 13 angle α is big, though these threads 13 can be had the preferable torsion that bears, though cutting effect not as the less thread of tooth peak angle α degree, so have it restricted on using, remains improvement in fact.

Summary of the invention

The object of the present invention is to provide a kind of sealed lower resistance screw, have the problem of sealed intensity difference to solve the screw that promotes cutting power in the prior art.

In order to reach above-mentioned purpose, solution of the present invention is:

A kind of sealed lower resistance screw comprises that the body of rod, plural whorl that a spiral shell head, is extended by this spiral shell head are located at first thread and on this body of rod in contrast to this spiral shell head direction and be located at locking part on this body of rod; This each first thread has one first upper tooth peak face and one and the first lower tooth peak face that joins of this first upper tooth peak face; The connecting part of this first upper tooth peak face and this first lower tooth peak face one first tooth peak angle of having joined; Wherein: whorl is provided with plural second thread that is located on this first upper tooth peak face and this first lower tooth peak face that divides on this body of rod; This each second thread has one second a upper tooth peak face and second a lower tooth peak face that is connected with this second upper tooth peak face; The connecting part of this second upper tooth peak face and this second lower tooth peak face one second tooth peak angle of having joined; Offer the relative fluting of plural number on these second upper tooth peak faces and the second lower tooth peak face; This first tooth peak angle is less than this second tooth peak angle.

Further, the diameter of this first thread is less than the diameter of this second thread.

Further, the diameter of this first thread equals the diameter of this second thread.

After adopting said structure, a kind of sealed lower resistance screw that the present invention relates to, when sealed, this fluting is except that can effectively cutting object and ccontaining smear metal, cooperate these first threads to be located at mode between these second threads again, and this first tooth peak angle not only can strengthen the characteristic of these second tooth peak intensities less than this second tooth peak angle, promote the cutting power of this sealed lower resistance screw more, so the present invention not only has the effect of fast locking, also has advantages of high strength.

Description of drawings

Fig. 1 is the schematic representation of existing a kind of screw;

Fig. 2 is the single thread sectional drawing of existing screw;

Fig. 3 is the thread schematic representation of existing screw;

Fig. 4 is the schematic perspective view of the present invention's first preferred embodiment;

Fig. 5 is the partial enlarged drawing of Fig. 4;

Fig. 6 is the single thread sectional drawing of the present invention's first preferred embodiment;

Fig. 7 is the thread schematic representation of the present invention's first preferred embodiment;

Fig. 8 is the thread schematic representation of the present invention's second preferred embodiment;

Fig. 9 is the thread schematic representation of the present invention's second preferred embodiment;

Figure 10 is the schematic perspective view of the present invention's the 3rd preferred embodiment;

Figure 11 is the partial enlarged drawing of Figure 10.

Among the figure:

Spiral shell head 11 bodies of rod 12

Thread 13 locking parts 14

Otch 131 upper tooth peaks 132

133 outer tooth peaks 134, lower tooth peak

Angle α summit, tooth peak 135

Apex angle ' the otch included angle A

Screw 1 object 2

Sealed lower resistance screw 3

Spiral shell head 31 bodies of rod 32

First thread, 33 first upper tooth peak faces 331

The first lower tooth peak face, 332 locking parts 34

Second thread, 35 second upper tooth peak faces 351

The second lower tooth peak face 352

Fluting B side of body limit B '

The first tooth peak angle β, the second tooth peak angle theta

Embodiment

In order further to explain technological scheme of the present invention, the present invention will be described in detail below by specific embodiment.Before invention was described in detail, annotate what want was that in the following description, similar elements is to represent with identical numbering.

Consult Fig. 4 to Fig. 7, first preferred embodiment of the sealed lower resistance screw 3 of the present invention, it includes the body of rod 32, plural whorl that a spiral shell head 31, extends by this spiral shell head 31 and is located at first thread 33 and on this body of rod 32 in contrast to these spiral shell head 31 directions and be located at locking part 34 on this body of rod 32; Wherein, this each first thread 33 has one first upper tooth peak face 331, and one and the first lower tooth peak face 332 that joins of this first upper tooth peak face 331; One first tooth peak angle β has joined in the connecting part of this first upper tooth peak face 331 and this first lower tooth peak face 332; Particularly, whorl is provided with plural second thread 35 that is located on this first upper tooth peak face 331 and this first lower tooth peak face 332 that divides on this body of rod 32; Wherein, this each second thread 35 has one second a upper tooth peak face 351 and second a lower tooth peak face 352 that is connected with this second upper tooth peak face 351; This second upper tooth peak face 351 and the connecting part of this second lower tooth peak face 352 one second tooth peak angle theta of having joined; Simultaneously, respectively offer the relative fluting B of plural number on these second upper tooth peak faces 351 and the second lower tooth peak face 352; Moreover this first tooth peak angle β is less than this second tooth peak angle theta; What deserves to be mentioned is that in the present embodiment, the diameter d of this first thread 33 can be arranged to the aspect less than the diameter D of this second thread 35, specifically as shown in Figure 6 and Figure 7, and this fluting B is compiled by at least two linear side of body limit B ' and forms.

Still continuous aforementioned, this sealed lower resistance screw 3 carries out on the object (not shown) when sealed, at first impose a rotary torsion on this spiral shell head 31 and drive this locking part 34 and lock in this object, so that these second threads 35 are cut this object, cooperate this moment these to be opened in fluting B on this second thread 35 again, auxiliary this object of rotary cut more is provided, and the smear metal after cutting also can be contained in wherein, in addition, be located at the mode of 35 of these second threads in view of these first threads 33, and this first tooth peak angle β is less than the setting of this second tooth peak angle theta, when tommy bar is locked, but these first thread, 33 real these second threads 35 of firm support are to bore the lock cutting, so can effectively strengthen the characteristic of the intensity of these second threads 35, significantly promote simultaneously the cutting power of this sealed lower resistance screw 3, to reach the effect of fast locking.

Moreover, these first threads 33 promote cutting effect with the combining the intensity that can strengthen these threads of these second threads 35, effectively solve this sealed lower resistance screw 3 in cutting process, because of this fluting B is provided with the inappropriate disappearance that influences shear action of angular dimension, add the diameter D of the diameter d of this first thread 33 less than this second thread 35, can be formed with a preferable chip space between this first thread 33 and this second thread 35, more can discharge fast, and then reach the effect of fast locking for the smear metal after cutting.

Consult Fig. 4, Fig. 5 and Fig. 8, Fig. 9, second preferred embodiment of the present invention, this sealed lower resistance screw 3 still includes members such as a spiral shell head 31, a body of rod 32, plural first thread 33, a locking part 34 and plural second thread 35, and its gain in strength, promote cutting power, and effect such as fast locking reach all described identically with first embodiment, do not describe in detail for this reason; Particularly, present embodiment is that the diameter d of this first thread 33 equals the diameter D of this second thread 35; When sealed, have second thread 35 of first thread 33 of the less first tooth peak angle β by these in conjunction with the second bigger tooth peak angle theta of these tools, it can be for this sealed lower resistance screw 3 in cutting process, obtain preferable meeting with stresses, to increase the brill lock intensity of this sealed lower resistance screw 3; Moreover this fluting B still possesses the chip space of certain size, like this, can not accumulate too much because of smear metal in the sealed process and produces powerful resistance, reaches effects such as fast locking really.

Cooperate and consult Figure 10 and Figure 11, the 3rd preferred embodiment of the present invention, this sealed lower resistance screw 3 still includes members such as a spiral shell head 31, a body of rod 32, plural first thread 33, a locking part 34 and plural second thread 35, and its gain in strength, promote cutting power, and effect such as fast locking reach all described identically with first embodiment, do not describe in detail for this reason; Particularly, present embodiment is that the fluting B that offered on these second threads 35 is compiled relatively by most linear side of body limit B ' and forms; Like this when sealed, except that utilizing these first threads 33 to provide with combining of these second threads 35 the preferable brill lock intensity, this fluting B still possesses the chip space of certain size, to reduce sealed resistance, promote cutting effect simultaneously, reach effects such as fast locking really.

Conclude aforementioned, the sealed lower resistance screw of the present invention is by offering the relative fluting setting of plural number on these second threads, use auxiliary rotary cut object and guarantee outside the chip space, cooperate this first tooth peak angle less than this second tooth peak angle to strengthen the stress of these second threads, thereby promote the cutting power of this sealed lower resistance screw, and then reach the effect of fast locking, so can reach purpose of the present invention really.

The foregoing description and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present invention to its suitable variation or modification of doing.

Claims

1. sealed lower resistance screw comprises that the body of rod, plural whorl that a spiral shell head, is extended by this spiral shell head are located at first thread and on this body of rod in contrast to this spiral shell head direction and be located at locking part on this body of rod; This each first thread has one first upper tooth peak face and one and the first lower tooth peak face that joins of this first upper tooth peak face; The connecting part of this first upper tooth peak face and this first lower tooth peak face one first tooth peak angle of having joined; It is characterized in that:

Whorl is provided with plural second thread that is located on this first upper tooth peak face and this first lower tooth peak face that divides on this body of rod; This each second thread has one second a upper tooth peak face and second a lower tooth peak face that is connected with this second upper tooth peak face; The connecting part of this second upper tooth peak face and this second lower tooth peak face one second tooth peak angle of having joined; Offer the relative fluting of plural number on these second upper tooth peak faces and the second lower tooth peak face; This first tooth peak angle is less than this second tooth peak angle.

2. a kind of sealed lower resistance screw as claimed in claim 1 is characterized in that the diameter of this first thread is less than the diameter of this second thread.

3. a kind of sealed lower resistance screw as claimed in claim 1 is characterized in that the diameter of this first thread equals the diameter of this second thread.