TWI548819B - Screw - Google Patents

Description

Screw

The present invention relates to a lock element design, and more particularly to a screw.

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 a thread 14 on the body 11; wherein the drill portion 13 has a tapered shape, so that when the screw 1 is locked for a lock member 2, the drill portion 13 is drilled and guided. The thread 14 continues to be screwed into the lock member 2, thereby achieving the locking positioning effect.

However, after the actual use, it is found that the conventional screw 1 can lock the lock component 13 for the lock component 2 during the locking of the lock component 2 (such as a composite panel); however, the locking process Because the drill lock 13 is limited in a tapered shape, the screw 1 can only be pushed into the lock member 2 by the tapered design, so as to cause the chips generated during the drill lock. Not only can it not be effectively cut off, but also is pushed by the drill lock 13 and squeezed outward, so that the chip cannot be smoothly discharged, and the screw 1 is subsequently re-locked into the lock member 2, which is easy. Obstructed by the chip, not only the locking resistance of the screw 1 is increased, but also the screw 1 cannot be smoothly locked into the lock member 2 during the locking process, which affects the actual construction work.

Furthermore, in view of the fact that the screw 1 is locked in the position shown by the imaginary line of FIG. 2, the position of the screw head 12 of the screw 1 is upwardly oriented after the locking, so that the screw head 12 is easy to face upward. Produce water and rust, so the current In order to avoid this situation, the screw 1 is locked into the lock member 2 in an inclined manner. Since the screw 1 is prone to chipping, the screw can be smoothly discharged, and the screw 12 can be protruded after being locked. The situation outside the lock member 2 is generated, which affects the subsequent jointing of the lock member 2 and is in a state of mutual engagement, so the structural design of the screw 1 needs to be improved.

Accordingly, it is an object of the present invention to provide a screw having a reinforced chip evacuation function to reduce the locking torque and thereby increase the locking speed, and the screw can be buried in the lock member after the lock.

Therefore, the screw of the present invention mainly comprises a rod body, a screw head, a drill lock portion and a plurality of threaded teeth provided on the rod body, and the drill lock portion is formed with two inclinations and does not extend into the rod. a cutting surface between the threads, and a cutting edge is formed at the intersection of the two cutting surfaces; wherein a positioning unit is formed on the cutting surface of the drilling lock portion, so that the cutting edge is stably cut, and the plurality of rings are disposed at The final thread in the thread on the rod extends to the cutting edge after being cut by a part of the area, and is connected to one end edge of the cutting edge; so that when the lock is locked, the positioning unit can be used first The top is abutted on a lock member to achieve a stable fixed position effect, and then the cutting edge is used for drilling and cutting to scrape the chips generated during the drilling process, and the cutting faces can guide the chip to smoothly enter the snail. The teeth are quickly discharged outwards to avoid causing a large amount of swarf accumulation, and the locking torque and the lifting lock speed are effectively reduced, and the screw is easily buried in the lock member after the screw is locked, which is advantageous for the locks. Subsequent attachment Of conduct.

The above and other technical contents, features, and advantages of the present invention will become apparent from the Detailed Description of the <RTIgt;

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

Referring to FIG. 3 and FIG. 4, in a preferred embodiment of the screw 3 of the present invention, in order to more clearly show the features of the screw 3, the corresponding figures of the present embodiment and the following embodiments are all shown in a side view; the screw 3 includes one a rod body 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 thread 34 of the plurality of spiral rings disposed on the rod body 31; A cutting passage 341 is formed between the threads 34, and the cutting surface 33 is formed with two cutting surfaces 331 which are inclined and do not extend into between the screws 34, and the two cutting surfaces 331 meet A cutting edge 332 is formed, and a positioning unit 334 is formed on the cutting surface 331. The positioning unit 334 is outwardly protruded from the cutting surface 331 and is disposed in a cone shape, and the positioning unit is The 334 is formed by combining the plurality of inclined faces 334' such that the inclined faces 334' are outwardly protruded from the cutting faces 331 to form a pointed shape. The positioning unit 334 is formed by four inclined faces 334'. The formed four-pointed tip cone is set as an example for description, or the positioning unit 334 can be wound by a conical surface. At the same time, the conical surface is outwardly protruded from the cutting faces 331, that is, a flat conical shape as shown in FIG. 5 is formed, so that the screw 3 is stably fixed, and the positioning unit 334 has a quadrangular tip. The tapered state is taken as an example. In addition, the cutting edge 332 has the ability to drill and cut the lock member 4, and the chip scraping effect generated during the drilling process, and the plurality of rings are disposed on the rod body. The final thread 34 of the thread 34 on the 31 extends to the cutting edge 332 after being cut by a partial area, and is connected to either end edge 333 of the cutting edge 332 so that the chip passage 341 can be used by the screw The teeth 34 are disposed in a state of being in communication with the drill lock portion 33.

Referring to FIG. 6, when the lock is engaged, the positioning unit 334 is used to abut against the lock member 4 (the composite plate as shown in the figure) to generate a stable fixed position, and the rotary head 32 is continuously applied with a rotational torque and synchronized. The drill lock portion 33 is rotated to rotate the cutting edge 332 into the lock member 4 by the drill lock portion 33, and the screw 34 is extended to one end of the cutting edge 332 by the screw 34. The edge 333 is designed such that the cutting edge 332 is brought into contact with the lock member 4, that is, the screw 34 is progressively driven into the lock member 4, so that the cutting edge 332 is in the process of drilling and cutting. Forming a drilling effect while the cutting edge 332 is rotating the chip generated during the locking process, the screw 34 extending to the one end edge 333 thereof, and the auxiliary arrangement of the two cutting surfaces 331 disposed obliquely In the following, the chips 34 can be passed along the thread, and in other words, the chips pushed by the two cutting surfaces 331 during the locking can be directly entered into the chip passages 341 of the threads 34 by the drill locking portion 33. So that the chips can be quickly and smoothly discharged through the chip evacuation passage 341, so that construction can be avoided. The squeezing and squeezing phenomenon occurs in a large amount of swarf, so that the screw 3 is gradually locked and buried in the lock member 4, not only can reduce the locking resistance, but also the screw 3 can be stably fixed therein, Whether the screw 3 is in an upright manner or in a tilt-locking manner, the screw 3 can be buried in the lock member 4 after the lock, which is more advantageous for the lock member 4 Follow-up construction will be carried out.

Referring to FIG. 7 and FIG. 8, a third preferred embodiment of the present invention, in order to more clearly show the features of the embodiment, the screw 3 in the figure is shown on the other side; the screw 3 still includes the rod 31. The main components of the screw head 32, the drill lock portion 33 and the plurality of screw teeth 34 are different from the previous embodiment in that the positioning unit 334 of the drill lock portion 33 is wound by a plurality of inclined faces 334'. The inclined surfaces 334' are recessed inwardly from the cutting faces 331 such that the cutting faces 331 are formed with a positioning groove 335, and the inclined faces 334' meet the cutting edge 332. An end point P is formed; in this embodiment, the end point P formed by the inclined surface 334' and the cutting edge 332 is formed to assist the flat cutting edge 332 and the cutting surface 331. , the screw 3 can be stably resisted on the object, so as to achieve fast twist lock and indeed chip and chip removal, and at the same time reduce the effect of the locking torque, so that the screw 3 can be more securely locked and buried.

Referring to FIG. 9, the fourth preferred embodiment of the present invention, and achieving the functions of the stable locking and the buried positioning are the same as those described in the first and second embodiments; in the embodiment, the rod body 31 is further A screw segment A is provided, and the screw segment A is composed of a plurality of auxiliary screw teeth 35, and the auxiliary screw teeth 35 are disposed between the screw teeth 34, and the outer diameter of the auxiliary screw teeth 35 The r2 is smaller than the outer diameter r1 of the screw 34. Of course, the design of the screw segment A can also be applied to the third embodiment, that is, as shown in the fifth preferred embodiment of FIG. 10; The screw teeth 34 and the plurality of auxiliary screw teeth 35 form a high-low tooth interlacing arrangement, so that during the drilling and locking process, the chip removing effect is accelerated, thereby reducing the locking resistance and preventing the occurrence of chipping, so as to enhance the lifting. The screw 3 locks smoothly and the stable buried position after locking.

Referring to FIG. 11, in a sixth preferred embodiment of the present invention, the difference between the embodiment and the fourth to fifth embodiments is that the auxiliary screw teeth 35 are provided with a plurality of saw teeth 351, and the screw teeth 34 are merging. A plurality of chip flutes 342 are provided, and the plurality of serrations 351 and the flutes 342 are also provided in the fifth embodiment, as shown in the seventh preferred embodiment of FIG. The design of the chip flutes 342 and the plurality of serrations 351 is to assist the drilling and locking portion 33 in drilling and cutting, so as to increase the cutting ability and also facilitate the chip removing operation, so the frictional resistance generated during the drilling lock is The torque can be greatly reduced, which not only improves the locking efficiency, but also quickly achieves the function of the stable locking and the buried positioning of the screw 3.

In summary, the screw of the present invention is provided with a positioning unit on the cutting surface of the drill lock portion, so that the locking process is firstly fixed by the positioning unit, and is matched with the cutting edge, the auxiliary of the two cutting surfaces, and Extending the setting of the thread connected to the one end edge of the cutting edge, so that the chips generated during the locking process can smoothly enter the chip evacuation passage between the threads through the cutting faces and quickly eliminate it, thereby avoiding The chips are hoarded to effectively reduce the locking torque and improve the smoothness of the lock. At the same time, the screw can be buried in the lock member after the lock, which is more suitable for the parallel construction of the lock components. It is indeed possible to achieve the object of the present invention.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made in accordance with the scope of the present invention and the contents of the description of the invention. All should remain within the scope of the invention patent.

3‧‧‧ screws

31‧‧‧ rod body

32‧‧‧ screw head

33‧‧‧Drill lock

34‧‧‧ thread

331‧‧‧cutting surface

332‧‧‧ cutting edge

333‧‧‧ edge

334‧‧‧ Positioning unit

334’‧‧‧ sloped surface

335‧‧‧ positioning slot

P‧‧‧ endpoint

342‧‧‧chip flute

A‧‧‧ thread segment

35‧‧‧Auxiliary thread

351‧‧‧Sawtooth

R1‧‧‧ thread diameter

r2‧‧‧Auxiliary thread 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 a first preferred embodiment of the present invention; FIG. 4 is a schematic view of the end face of the preferred embodiment; 2 is a schematic view of a partial member of the second preferred embodiment of the present invention; FIG. 6 is a schematic view of the locked state of the first preferred embodiment; FIG. 7 is a schematic view of a third preferred embodiment of the present invention; Figure 9 is a schematic view of a fourth preferred embodiment of the present invention; Figure 10 is a schematic view of a fifth preferred embodiment of the present invention; and Figure 11 is a sixth preferred embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 12 is a schematic view showing a seventh preferred embodiment of the present invention.

3‧‧‧ screws

31‧‧‧ rod body

32‧‧‧ screw head

33‧‧‧Drill lock

34‧‧‧ thread

331‧‧‧cutting surface

332‧‧‧ cutting edge

333‧‧‧ edge

334‧‧‧ Positioning unit

334’‧‧‧ sloped surface

341‧‧‧ chip evacuation channel

Claims (7)

a screw 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 thread of a plurality of spiral rings disposed on the rod body; wherein A cutting surface is formed on the drill locking portion, and a cutting edge is formed at the intersection of the two cutting surfaces. The cutting surface of the drill locking portion is formed with a positioning unit for the cutting edge to be stably cut. Each of the cutting faces does not extend between the threads, and the final thread of the plurality of threads disposed on the rods extends through the reduced area to the cutting edge, and the cutting edge One end of the edge is connected. The screw according to claim 1, wherein the rod body is further provided with a screw segment, and the screw segment is composed of a plurality of auxiliary screw teeth, and the auxiliary screw ring is disposed on the screw Between the teeth, the outer diameter of the auxiliary screw is smaller than the outer diameter of the thread. The screw according to claim 2, wherein the auxiliary screw is provided with a plurality of serrations, and the plurality of flutes are partially formed on the threads. The screw according to any one of claims 1 to 3, wherein the positioning unit is protruded outwardly from the cutting faces, and the positioning unit is disposed in a cone shape. The screw according to claim 4, wherein the positioning unit is formed by combining a plurality of inclined surfaces such that the positioning unit has a tapered shape. The screw according to claim 4, wherein the positioning unit is wound by a conical surface to make the positioning unit have a conical shape. The screw according to any one of the preceding claims, wherein the positioning unit is formed by a plurality of inclined faces, and the inclined faces are recessed from the cutting faces. The positioning faces are formed on the cutting faces, and the inclined faces are formed at an intersection with the cutting edges.