CN2738020Y

CN2738020Y - Sawtooth thread screw

Info

Publication number: CN2738020Y
Application number: CN 200420095062
Authority: CN
Inventors: 陈姵桦
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-11-08
Filing date: 2004-11-08
Publication date: 2005-11-02
Anticipated expiration: 2014-11-08

Abstract

The utility model discloses a sawtooth thread screw, which is characterized in that a rod body is provided with a first screw thread section and a second screw thread section. The included angle of the thread peaks of the first screw thread section is more than the included angle of the thread peaks of the second screw thread section, and meanwhile, the screw thread is provided with a plurality of concave parts. A cutting blade is formed between any two concave parts, and the cutting blade and the thread peak center are arranged in an incline way, which makes the cutting blades can mutually alternately arranged in sawtooth shape. Thus, when the utility model is locked, the thread teeth of the starting part of the point end can bear the torque of the primary period of closure, which can avoid generating the damage condition. Meanwhile, the effect of quick-speed closure can be achieved by the fast shearing of the concave parts and the cutting blades.

Description

The screw of sawtooth pattern screw thread

Technical field

The utility model relates to a kind of screw, refers to a kind of screw of sawtooth pattern screw thread especially.

Background technique

Consult shown in Figure 1ly, known screw 1 includes a spiral shell head 11, and the body of rod 12 that links with this spiral shell head 11, and most whorl is located at the members such as thread 13 on the body of rod 12; Wherein, offer a plurality of depressed parts 131 on this thread 13, and be formed with a cutting blade 132 between any two depressed parts 131, thereby make this thread 13 be gear shape.

When this screw 1 is locked on an object 10, the depressed part 131 and the cutting blade 132 that form on this thread 13, can make the thread 13 of spiral surrounding be gear shape, so can shear wood fiber effectively, to reduce sealed resistance, enter in the object 10 thereby be beneficial to screw 1 fast locking, the wood chip that is cut generation simultaneously then can lodge in these threads 13 form between in the crack, to reach sealed and effect such as location.

Yet, use the back to find that this screw 1 still has the following improvements for the treatment of in reality, details are as follows now:

1, because this screw 1 is by integrated thread 13 cutting objects 10, to reach the effect that the body of rod 12 screws in, as seen this screw 1 desires to reach sealed location, the sharpness that depends on these thread 13 threading moulding fully, that is these thread 13 moulding angular dimensions, when thread 13 angles hour, thread 13 thinner thicknesses, the sharpness of its cutting increases, can promote the cutting effect of this thread 13, relatively, the sealed moment of torsion that this thread 13 be can bear be reduced, the thread 13 of adding this tip section start is an incomplete tooth, make this thread 13 can't bear the moment of torsion that the initial stage produces at the beginning of sealed, the starting point that causes this place thread 13 to screw in easily produces damage, and influence is guided the body of rod 12 and is screwed in the object 10, cause sealed process more to require great effort, remain in fact to be improved.

2, still continuous aforementioned, when these thread 13 angles are big, the thickness of thread 13 is thicker, its sealed moment of torsion tolerances promotes, so can bear the moment of torsion that the sealed initial stage produces, and avoid the thread 13 of this tip section start to damage the phenomenon generation, relatively, to the sharpness of this thread 13 be reduced, it is disconnected to cause thread 13 effectively wood fiber to be sheared, and only this wood fiber is strutted to enter, on the contrary, very easily tension force is counter to clamp down on the body of rod 12 because of strutting not to be sheared disconnected wood fiber, cause in the sealed process, the builder promptly need bestow bigger screw-in torsion, and the beginning can allow this body of rod 12 be screwed into smoothly in the object 10, except that causing construction inconvenience, more influence sealed efficient.

The model utility content

The purpose of this utility model be to provide have on a kind of the use sealed fast and reduce the screw of the sawtooth pattern screw thread of sealed moment of torsion.

For achieving the above object, technical solution of the present utility model is: a kind of screw of sawtooth pattern screw thread, it includes a spiral shell head, one is located at the body of rod on the spiral shell head, and most whorls are located at the thread on the body of rod, this body of rod has second threaded section of contiguous this spiral shell head, and first threaded section of opposite second threaded section, each thread of this first and second threaded section has a upper and lower cutting face simultaneously, and this upper and lower cutting face joins and is formed with Yi Yafeng, offer a plurality of depressed parts on this thread in addition, and be formed with a cutting blade between any two depressed parts; Wherein: the tooth peak angle of this first threaded section is greater than the tooth peak angle of second threaded section, and this cutting blade and tooth peak center are inclined to set simultaneously, and the interlaced arrangement of each cutting blade.

The tooth peak angle of this second threaded section is 40 degree, and the tooth peak angle of this first threaded section is 60 degree.

This depressed part and cutting blade only take shape on second threaded section.

This depressed part is the V-arrangement shape.

This cutting blade is pointed shape.

After adopting such scheme, the utility model is compared with known, when learning that the utility model has following listed advantage and effect really:

1, since the tooth peak angle of this first threaded section greater than the tooth peak angle of second threaded section, to make this first threaded section can bear bigger sealed moment of torsion at the sealed initial stage, avoid the tooth peak of this tip section start thread to produce the situation of damaging, this will help the guide function in the sealed process.

2, still continuous aforementioned, because this first threaded section can bear the moment of torsion that the sealed initial stage produces, the situation of avoiding this tooth peak to damage, add on the thread of this second threaded section and be formed with depressed part and cutting blade, and this cutting blade also is inclined to set with the tooth peak center, this cutting blade can interlacedly be arranged, so that the tooth peak forms staggered up and down flexuose, event is cutting objects quickly and efficiently, and then reduce the generation of sealed resistance, be screwed into object in order to this body of rod of guiding, will make sealed process more laborsaving, quick.

Description of drawings

Fig. 1 is the user mode schematic representation of known screw;

Fig. 2 is the schematic perspective view of the utility model first preferred embodiment;

Fig. 3 is the enlarged diagram of the utility model second preferred embodiment;

Fig. 4 is the local enlarged diagram of the thread of the utility model first preferred embodiment;

Fig. 5 is the enlarged diagram of the utility model the 3rd preferred embodiment;

Fig. 6 is the enlarged diagram of the utility model the 4th preferred embodiment;

Fig. 7 is the locked state schematic representation of the utility model first preferred embodiment.

Embodiment

Before the utility model is described in detail, be noted that in the following description similarly assembly is to represent with identical numbering.

Consult shown in Figure 2ly, it is first preferred embodiment of the present utility model, and this screw 2 includes a spiral shell head 21, and is located at the body of rod 22 on the spiral shell head 21, and most whorl is located at the thread 23 on the body of rod 22; Wherein, this body of rod 22 has second threaded section 222 of contiguous this spiral shell head 21, and first threaded section 221 of opposite second threaded section 222, each thread 23 of this first and second threaded section 221,222 can be thread shapes such as square tooth or pointed tooth simultaneously, no matter square tooth or pointed tooth all have a upper and lower cutting face 231,232, and this upper and lower cutting face 231,232 joins and is formed with a tooth peak 233, below only with pointed tooth explanation; Particularly, the tooth peak 233 angle α of this first threaded section 221 are greater than tooth peak 233 angle theta of second threaded section 222, and the tooth peak 233 angle [alpha] system of this first threaded section 221 shows that with 60 kilsyth basalts the tooth peak 233 angle θ of this second threaded section 222 then are that 40 kilsyth basalts show in the present embodiment.

Still continuous aforementioned, offer a plurality of depressed parts 234 on this thread 23 again, and this depressed part 234 only takes shape in present embodiment on second threaded section 222, certainly this depressed part 234 forms aspect and also can extend to first threaded section, 221 position (not shown)s by second threaded section 222, this depressed part 234 is except the shape moulding shown in the present embodiment in addition, also can form V-arrangement design as shown in Figure 3, following present embodiment narration only is that example is illustrated with Fig. 2; Moreover, and be formed with a cutting blade 235, and this each cutting blade 235 is gear shape in these 234 of wantonly two depressed parts, cooperate and consult Fig. 4, this cutting blade 235 is inclined to set with 233 centers, tooth peak more simultaneously, and makes this cutting blade 235 be the interlaced arrangement shown in the figure; Certainly, except the kenel shown in the present embodiment, also can such as Fig. 5 or pointed cutting blade 235 shown in Figure 6 the interlaced sawtooth aspect of formation.

Consult Fig. 4 and Fig. 7, when this screw 2 carries out sealed operation, because the tooth peak 233 angle α of this first threaded section 221 are greater than tooth peak 233 angle theta of second threaded section 222, so the thread 23 of this first threaded section 221 can bear that the sealed initial stage produces than high pulling torque, avoid the tooth peak 233 of the thread 23 of this tip section start to damage, cooperate this cutting blade 235 to be staggered up and down flexuose design simultaneously in the sealed process again, event is cutting objects 20 quickly and efficiently, reducing the generation of sealed resistance, thereby reach the fast locking effect.

Conclude aforementioned, the utility model is by the tooth peak angle of this first threaded section tooth peak angle greater than second threaded section, offer a plurality of depressed parts on this thread simultaneously, and be formed with a cutting blade between these any two depressed parts, this cutting blade and tooth peak center are inclined to set, so that this cutting blade can interlaced arrangement be provided with indentation, removing makes this thread can bear the moment of torsion at sealed initial stage, to avoid this tooth peak to produce the situation of damaging, and THE ADIABATIC SHEAR IN object effectively, reach the generation that reduces sealed resistance.

Claims

1, a kind of screw of sawtooth pattern screw thread, it includes a spiral shell head, one is located at the body of rod on the spiral shell head, and most whorls are located at the thread on the body of rod, and this body of rod has second threaded section of contiguous this spiral shell head, and first threaded section of opposite second threaded section, each thread of this first and second threaded section has a upper and lower cutting face simultaneously, and this upper and lower cutting face joins and is formed with Yi Yafeng, offers a plurality of depressed parts on this thread in addition, and is formed with a cutting blade between any two depressed parts; It is characterized in that:

The tooth peak angle of this first threaded section is greater than the tooth peak angle of second threaded section, and this cutting blade and tooth peak center are inclined to set simultaneously, and the interlaced arrangement of each cutting blade.

2, according to the screw of the described sawtooth pattern screw thread of claim 1, it is characterized in that: the tooth peak angle of this second threaded section is 40 degree, and the tooth peak angle of this first threaded section is 60 degree.

3, according to the screw of the described sawtooth pattern screw thread of claim 1, it is characterized in that: this depressed part and cutting blade only take shape on second threaded section.

4, according to the screw of the described sawtooth pattern screw thread of claim 1, it is characterized in that: this depressed part is the V-arrangement shape.

5, according to the screw of the described sawtooth pattern screw thread of claim 1, it is characterized in that: this cutting blade is pointed shape.