TWM444436U - A screw capable of rapidly drilling and cutting - Google Patents

Description

Fast-locking, cutting fasteners

The present invention relates to a lock component design, and more particularly to a fastener with a fast drill lock and cutting.

Referring to FIG. 1 , the conventional screw 1 includes a rod body 11 , a screw head 12 disposed at one end of the rod body 11 , a drill lock portion 13 disposed at the other end of the rod body 11 , and a plurality of spiral rings disposed on the rod The thread 14 of the body 11; wherein the drill portion 13 has a tapered shape, so that when the screw 1 is locked for an object 2, the drill portion 13 is drilled and the snail is guided. The tooth 14 continues to be twisted into the object 2 to achieve the locking positioning effect.

However, after the actual use, it is found that the conventional screw 1 can be drilled and locked for the object 2 during the locking of the object 2 (such as a composite plate); however, during the locking process, The drill-locking portion 13 is limited to a tapered design, so that the screw 1 can only be pushed into the object 2 by the tip-shaped design, so that the chips generated during the drilling lock can not be effectively cut. The squeezing is also only pushed by the drill-locking portion 13 and pushed outwards, so that the swarf cannot be smoothly discharged, and the screw 1 is easily blocked by the swarf when it is further locked into the object 2, which not only increases the The locking resistance of the screw 1 and the screw 1 cannot be smoothly locked into the object 2 during the locking process, which affects the actual construction work, and the object 2 is prone to cracking after the screw 1 is forcibly locked. The phenomenon needs to be improved.

Furthermore, in view of the fact that the screw 1 is locked at the position indicated by the imaginary line of FIG. 2, the position of the screw head 12 of the screw 1 is upwardly aligned after the locking. As a result, the screw head 12 is apt to generate water and rust. Therefore, in order to avoid this situation, the screw 1 is locked into the object 2 in an inclined manner, and the screw 1 is easy to be chipped. The discharge condition causes the screw head 12 to stick out of the object 2, which affects the subsequent attachment of the object 2 and is in a state of mutual adhesion, which causes inconvenience in subsequent use and needs to be improved.

Therefore, the purpose of the present invention is to provide a fastener with fast drilling lock and cutting, which has the functions of accelerating the locking speed, improving the chip removing function and reducing the locking torque, so as to facilitate the subsequent construction work.

Therefore, the fastener with rapid drilling lock and cutting mainly comprises a rod body, a screw head, a drill lock portion and a plurality of threaded teeth provided on the rod body; wherein the drill lock portion is formed with a second cutting surface, wherein the cutting surfaces are formed with all the blade ends, and the cutting surface is protruded outwardly with a positioning portion, so that the cutting edge end is divided into two by the positioning portion. a cutting edge, and an angle of less than 180 degrees between the two cutting edges; therefore, the positioning portion is pre-positioned, pre-drilled during the locking process, and then drilled by the cutting edges, and drilled and cut The chips generated in the process are quickly discharged outwards under the guidance of the cutting faces, so as to avoid the occurrence of a large amount of swarf accumulation, which can effectively accelerate the locking speed and reduce the locking torque, so as to make the lock After the fastener is successfully buried in the object, it is more conducive to the subsequent construction work.

The foregoing and other technical contents, features and effects of the present invention are The detailed description of the preferred embodiments with reference to the drawings will be clearly understood.

In the following description, similar elements are denoted by the same reference numerals before the present invention is described in detail.

Referring to FIG. 3 and FIG. 4, a preferred example of the present invention has a fast drill lock and a cutting fastener 3. In order to more clearly show the characteristics of the fastener 3, the corresponding figures of the following figures and the following embodiments are all on one side. The fastener 3 includes a rod 31, a screw head 32 disposed at one end of the rod body 31, a drill lock portion 33 disposed at the other end of the rod body 31, and a plurality of spiral rings disposed on the rod A thread 34 on the body 31; wherein a chip passage 341 is formed between the threads 34.

Furthermore, the drilling lock portion 33 is formed with two inclined cutting faces 331, and all the blade ends 332 are formed at the intersection of the two cutting faces 331, and a cone is outwardly convex at the junction of the two cutting faces 331. The positioning portion 333 is divided into two cutting edges 3321 by the cutting edge end 332 being separated by the positioning portion 333, and each cutting edge 3321 is disposed at an oblique angle, and the two cutting edges 3321 are formed one by one. The angle θ 1 is less than 180 degrees, and the angle θ 1 is different from the angle θ 2 of the positioning portion 333 , that is, the angle θ 2 of the positioning portion 333 is smaller than the angle θ 1 between the two cutting edges 3321 (as shown in the figure). The positioning portion 333 is outwardly convex from the cutting faces 331 and is disposed in a cone shape, and the positioning portion 333 is formed by combining a plurality of inclined faces 333'. The inclined surface 333' is outwardly protruded from the cutting surface 331 to form a tapered shape. The positioning portion 333 is illustrated by taking the four-corner tapered cone formed by the four inclined surfaces 333' as an example, or The positioning portion 333 can be wound by a conical surface, and the conical surface is outwardly protruded from the cutting surfaces 331, that is, as shown in FIG. The positioning portion 333 is described by taking a four-corner tapered shape as an example. In addition, the cutting edge 3321 has the effect of scraping the chip during the process of cutting an object, and the plurality of threads 34 extending on the rod 31 extend. The cutting edge 3321 is connected to the edge 3322 of the cutting edge 3321 so that the chip passage 341 can be disposed by the screw 34 to engage with the drill portion 33. Connected state.

Referring to FIG. 7, when the lock is engaged, the positioning portion 333 is preliminarily abutted on the object 4 (ie, the composite plate shown in the drawing), so that the fastener 3 has a stable fixing effect during the preliminary locking process, and then Applying a rotational torque to the screw head 32 to interlock the rotation of the drill lock portion 33, so that the cutting edges 3321 are drilled on the lock compound 4 under the driving of the drill lock portion 33, That is, the positioning portion 333 is used as a center fulcrum to allow the cutting edges 3321 to enter the object 4 by rotary cutting, and the screw 34 extends to the end edge 3322 of the cutting edge 3321. Therefore, the chips generated during the locking are pushed by the two cutting faces 331, and the chips are quickly passed through the chip passages 341 between the threads 34 of the cutting edge 3322 of the cutting edge 3321. The ground is discharged outwards, so as to avoid the accumulation and extrusion of a large amount of chips, and at the same time, the fastener 3 can lift the locking speed and reduce the locking resistance, so that it can be stably and smoothly buried in the object 4, thus The fastener 3 is in an upright manner or in a tilt-locking manner. Construction, can make the fastener 3 after the lock does Buried within the object 4, more conducive to such item is the follow-up and then the construction of 4 get on.

Referring to FIG. 8 , in the third preferred embodiment of the present invention, the fastener 3 still includes the main components such as the rod body 31 , the screw head 32 , the drill lock portion 33 , and the plurality of screw teeth 34 , and the present embodiment and the previous embodiment The difference is that the rod body 31 is provided with an edentulous area 311, and the edentulous area 311 can divide the thread 34 into a first tooth segment, a second tooth segment A1, A2, and the aforementioned toothless region 311 The outer diameter R1 is larger than the outer diameter R2 of the rod body 31 and smaller than the outer diameter R3 of the thread 34, and the thread 34 of the second tooth segment A2 extends to the cutting edge 3321 and is associated with the outer diameter R3. The end edge 3322 of the cutting edge 3321 is in contact.

Therefore, when the drill lock is performed, the positioning portion 333 is firstly fixedly fixed on the object 4 (not shown), and the rotary head 32 is used to apply a rotational torque to rotate the drill lock portion 33 into the object. 4, after the cutting edges 3321 are brought into contact with the object 4, the second segment A2 is progressively driven into the object 4, and the generated chips are extended to the workpiece through the two cutting faces 331. The second segment A2, and by the chip evacuation passages 341 between the plurality of screw teeth 34, the chips can be quickly re-passed through the edentulous region 311 and the first segment A1 and then discharged to remove a large amount of chips. The hoarding and squeezing, and in view of the design that the outer diameter R1 of the edentulous region 311 is larger than the outer diameter R2 of the rod body 31, the fastener 3 is stably positioned in the object after the gradual drilling lock is sunk into the object 4. Therefore, no matter which way the fastener 3 is used for drilling and locking construction, the fastener 3 can be more stably locked and buried.

Referring to FIG. 9, the fourth preferred embodiment of the present invention achieves the same functions as those of the first and second embodiments in terms of achieving stable locking and buried positioning; In this embodiment, a third segment B is additionally disposed on the rod body 31, and the third segment B is composed of a plurality of auxiliary teeth 35, and the auxiliary teeth 35 are disposed between the threads 34. At the same time, the outer diameter R4 of the auxiliary teeth 35 is smaller than the outer diameter R3 of the screw teeth 34; therefore, the screw teeth 34 and the plurality of auxiliary teeth 35 form a high and low tooth staggered arrangement, so that during the drilling lock process Moreover, the fiber cutting and chip removing effect of the object 4 (not shown) is accelerated, thereby reducing the locking resistance and preventing the occurrence of chipping, so as to improve the locking and smoothness of the fastener 3 and the locking. The effect of stable buried positioning.

Referring to FIG. 10, in a fifth preferred embodiment of the present invention, the difference between the embodiment and the fourth to fifth embodiments is that the auxiliary teeth 35 are provided with a plurality of saw teeth 351, and the screw teeth 34 are partially combined. A plurality of chip flutes 342 are provided, and the design of the chip flutes 342 and the plurality of serrations 351 are used to assist the drill tail 33 in drilling and cutting operations, so as to increase the cutting ability and also facilitate the chip removal operation. Therefore, the frictional resistance and the torsion force generated when the drill is locked are greatly reduced, which not only improves the locking efficiency, but also quickly achieves the effect of the stable locking and the buried positioning of the fastener 3.

In summary, the present invention has a positioning portion formed by the intersection of the two cutting faces of the drill locking portion, so that the cutting edge end of the drill locking portion is divided into two cutting edges by the positioning portion, In the locking process, the positioning portion is pre-positioned, pre-drilled, and matched with the cutting edges and the cutting surfaces of the two cutting surfaces, so that the chips generated during the drilling and locking process can be guided by the cutting surfaces. It is quickly discharged to the outside, avoiding the occurrence of excessive accumulation of chips, so as to effectively reduce the locking torque and improve the smoothness of the lock. At the same time, the fastener is buried in the object, which is more suitable for the purpose. And other objects connected to the construction It is carried out, so it can achieve the purpose of this new type.

However, the above description is only for the purpose of illustrating the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention, that is, the simple equivalent changes and modifications made in accordance with the scope of the present patent application and the contents of the new specification. All should remain within the scope of this new patent.

3‧‧‧fasteners

31‧‧‧ rod body

32‧‧‧ screw head

33‧‧‧Drill lock

34‧‧‧ thread

331‧‧‧cutting surface

332‧‧‧ cutting edge

333‧‧‧ Positioning Department

311‧‧‧Without the tooth

3321‧‧‧ cutting edge

3322‧‧‧ edge

333’‧‧‧ sloped surface

342‧‧‧chip flute

θ 1‧‧‧ cutting edge angle

θ 2‧‧‧Positioning angle

A1‧‧‧first segment

A2‧‧‧second tooth segment

B‧‧‧ third segment

35‧‧‧Assistive teeth

351‧‧‧Sawtooth

R1‧‧‧ edentulous area outer diameter

R2‧‧‧ Rod outer diameter

R3‧‧‧ thread diameter

R4‧‧‧Assisted tooth outer diameter

1 is a schematic view of a conventional screw; FIG. 2 is a schematic view showing another state of the lock; FIG. 3 is a schematic view of the first preferred embodiment of the present invention; FIG. 4 is a schematic view of the end face of the preferred embodiment; FIG. 6 is a schematic view showing a locked state of the first preferred embodiment; FIG. 7 is a schematic view of a second preferred embodiment of the present invention; FIG. 8 is a schematic view of the second preferred embodiment of the present invention; 3 is a schematic view of a fourth preferred embodiment of the present invention; and FIG. 10 is a schematic view of a fifth preferred embodiment of the present invention.

3‧‧‧fasteners

31‧‧‧ rod body

32‧‧‧ screw head

33‧‧‧Drill lock

34‧‧‧ thread

331‧‧‧cutting surface

332‧‧‧ cutting edge

333‧‧‧ Positioning Department

311‧‧‧Without the tooth

3321‧‧‧ cutting edge

3322‧‧‧ edge

333’‧‧‧ sloped surface

341‧‧‧ chip evacuation channel

Claims (8)

A fast drilling lock, cutting fastener, comprising a rod body, a screw head disposed at one end of the rod body, a drill lock portion disposed at the other end of the rod body, and a plurality of spiral rings disposed on the rod body a screw thread; wherein the drill lock portion is formed with two inclined cutting faces, and the two cutting faces are formed with all blade ends; wherein: the intersection of the two cutting faces of the drill lock portion A tapered positioning portion is protruded outwardly to divide the cutting edge end into two cutting edges by the positioning portion, and each cutting edge is disposed at an inclined angle, and the two cutting edges are formed An angle less than 180 degrees, and the angle is at an angle different from the angle of the tapered portion. According to the invention of claim 1, the fast-locking and cutting fasteners are provided, wherein the rod body is provided with an edentulous area, and the edentulous area is divided into first and second between the threads. The tooth segment, while the outer diameter of the toothless region is larger than the outer diameter of the rod body and smaller than the outer diameter of the thread. The fast-locking and cutting fastener according to the first or the second aspect of the patent application, wherein the positioning portion has an angle smaller than an angle between the two cutting edges. The fast-locking and cutting fastener according to the first aspect of the invention, wherein the threaded ring on the rod extends to the cutting edge and is in contact with an edge of a cutting edge. The fast-locking and cutting fastener according to the first aspect of the patent application, wherein the rod body is further provided with a third tooth segment, and the third tooth segment is composed of a plurality of auxiliary teeth, and the auxiliary The ring is placed on the thread Meanwhile, the outer diameter of the auxiliary teeth is smaller than the outer diameter of the thread. According to the fifth aspect of the patent application, the fast-locking and cutting fasteners are provided, wherein the auxiliary teeth are provided with a plurality of serrations, and the plurality of flutes are partially opened on the threads. The fast-locking and cutting fastener according to the first aspect of the patent application, wherein the positioning portion is formed by combining a plurality of inclined faces so that the positioning portion has a tapered shape. The fast-locking and cutting fastener according to the first aspect of the patent application, wherein the positioning portion is formed by a conical surface circle so that the positioning portion has a conical shape.