TW202503179A - Screw - Google Patents

Abstract

A screw mainly includes a plurality of thread convolutions spirally formed on a shank having a plurality of troughs crossing each other. Each thread convolution has a plurality of notches recessedly formed therein, a plurality of cutting edges each formed around an outer periphery of each notch, and a plurality of cutting units each situated between every two adjacent notches. Each cutting unit of one thread convolution is aligned with each corresponding notch of another adjacent thread convolution. Thus, the cutting units and the cutting edges are adapted to sever fibers of a workpiece quickly, thereby facilitating a cutting effect. Chips are allowed to travel in the notches and the troughs, thereby attaining a quick removal of chips, achieving a suitable accumulation of chips for a tight engagement, and attaining an anti-loosening effect.

Description

Screws

The present invention relates to a screw structure, in particular to a screw which increases chip removal and chip accommodation space, improves cutting effect, and reduces cracking.

Referring to FIG. 1 and FIG. 2 , the conventional screw 1 includes a rod 11, and the rod 11 has two opposite ends forming a first end and a second end, a head 12 disposed at the first end of the rod 11, a tail 13 disposed at the second end of the rod 11, and a plurality of spiral rings disposed on the rod 11. The threads 14 each have an upper tooth surface 141 extending outward from the rod 11 and facing the head 12, and a lower tooth surface 141 extending outward from the rod 11 and facing the tail 13. 2, when the screw 1 is locked, the tail 13 is firstly positioned against the surface of an object 2, and then a rotational torque is applied to the head 12, so that the tail 13 and the screw threads 14 are driven to cut downwardly the object 2, and when the screw 1 is completely screwed into the object 2, the locking operation of the screw 1 is completed.

However, after actual use, it was found that the thread 14 of the screw 1 was fully threaded, so that the thread 14 was subjected to relatively large locking resistance during the process of being screwed into the object 2, which easily caused the thread 14 to be excessively worn and blunted. The worn and blunted thread 14 could not effectively damage the fiber of the object 2. In addition, there was not enough space between the rod 11 and the thread 14 for chip removal and chip accommodation, resulting in the generation of cuttings. The chips can only be slowly discharged outward along the narrow space between the threaded teeth 14 and the rod 11, which not only causes the chips to be unable to be discharged outward quickly and smoothly, resulting in increased locking resistance and reduced locking speed, but also if the screw 1 continues to squeeze the chips, it is more likely to cause the object 2 to crack. Furthermore, insufficient chip space will also cause the bite force and locking property of the screw 1 after locking to be poor, causing the screw 1 to be easily loosened, which really needs to be improved.

Therefore, the purpose of the present invention is to provide a screw that can effectively destroy the fibers of an object, improve the cutting effect, and at the same time provide sufficient space for chip accommodation and chip removal, thereby reducing the locking resistance and improving the bite force and locking property after locking.

Therefore, the screw of the present invention includes a rod, a head and a tail respectively arranged at two ends of the rod, and a plurality of screw threads spirally arranged on the rod, wherein the screw threads are arranged on the rod at axial intervals to define a plurality of setting surfaces on the outer peripheral surface of the rod, and at least one mesh portion is recessed on at least one setting surface, and the mesh portion has a plurality of grooves that cross each other, and each screw thread has an upper tooth surface and a lower tooth surface respectively extending outward from the rod, a tooth peak formed at the junction of the upper tooth surface and the lower tooth surface, a plurality of grooves opened at the tooth peak, and a plurality of protruding teeth respectively formed between the grooves, and A cutting edge is formed at the periphery of each groove. In addition, the positions of the protruding teeth and the grooves on any two adjacent screw teeth are exactly opposite. Therefore, the fibers of the object are effectively destroyed by the protruding teeth and the cutting edges, thereby greatly improving the cutting effect. At the same time, the grooves and the channels allow the generated chips to pass through, and increase the chip removal and chip accommodation space, so that the chips can be quickly discharged outward, thereby greatly reducing the locking resistance, increasing the locking speed, and avoiding cracking of the material. Furthermore, the channels and the grooves can also accommodate a proper amount of chips, thereby increasing the tightening force between the screw and the object, thereby improving the bite force and locking property after locking.

The above-mentioned other technical contents, features and effects of the present invention will be clearly understood in the following detailed description of the preferred embodiments with reference to the drawings.

Referring to FIG. 3 , a first preferred embodiment of the present invention, the screw 3 includes a rod 31, and the rod 31 has a first end and a second end formed at opposite ends, a head 32 disposed at the first end of the rod 31, a tail 33 disposed at the second end of the rod 31, and a plurality of screw threads 34 disposed on the rod 31 in a spiral ring, and the screw threads 34 are spaced apart along an axial direction to divide the outer peripheral surface 31A of the rod 31 into a plurality of screw threads disposed at the second end of the rod 31. The setting surface 311 between the screw teeth 34 has at least one mesh portion 35 recessed on the outer peripheral surface 31A, and the mesh portion 35 is specifically arranged on at least one setting surface 311, the mesh portion 35 has a plurality of recessed grooves 351, and the grooves 351 cross and intersect each other, and in this embodiment, a plurality of mesh portions 35 are arranged on adjacent setting surfaces 311, and the mesh portions 35 are preferably arranged on 5 to 6 adjacent setting surfaces 311.

Referring to FIG. 3 and FIG. 4 , each screw thread 34 has an upper tooth surface 341 facing the head portion 32 and a lower tooth surface 342 facing the tail portion 33, and the upper tooth surface 341 and the lower tooth surface 342 extend outwardly from the rod body 31 and intersect to form a tooth peak 343. In addition, a plurality of grooves 344 are concavely provided on the tooth peaks 343, and the grooves 344 are spaced apart from each other so that a convex tooth 345 is formed between any two adjacent grooves 344, and a cutting edge 346 is formed around each groove 344. In addition, the convex teeth 345 of one screw thread 34 are aligned with the grooves 344 of another adjacent screw thread 34, that is, any two adjacent grooves 344 are aligned with each other. The positions of the protruding teeth 345 and the grooves 344 of the screw teeth 34 are exactly opposite, that is, as shown in Figure 5, when any two screw teeth 34 are completely overlapped when viewed from a top or bottom angle, the position where the grooves 344 are set on one screw tooth 34 is exactly the position where the protruding teeth 345 are set on the other adjacent screw tooth 34, and conversely, the position where the protruding teeth 345 are set on the one screw tooth 34 is also the position where the grooves 344 are set on the other adjacent screw tooth 34. In this embodiment, the grooves 344 and the cutting edges 346 are arranged in an arc shape, and the grooves 344, the protruding teeth 345 and the cutting edges 346 are arranged on 5 to 6 screw teeth 34.

Referring to FIG. 3, FIG. 4 and FIG. 6, when the screw 3 is locked, the tail 33 is first positioned against the surface of an object 4, and then a rotational torque is applied to the head 32, so that the tail 33 and the screw threads 34 are driven to cut the object 4 downward. In view of the grooves 344 formed on the screw threads 34, the locking force on the screw threads 34 during cutting can be greatly reduced. The locking resistance is reduced by the teeth 345 and the cutting edges 346, so as to effectively cut the fibers of the object 4, thereby preventing the fibers from being entangled in the rod 31 and causing an increase in the locking resistance. At the same time, the cutting effect can be greatly improved. In addition, the design of the teeth 345 of any two screw threads 34 being staggered can achieve a multiple peeling effect, thereby helping to completely destroy the fibers of the object 4. In addition, the grooves 351 of the mesh portion 35 greatly increase the space for chip removal and chip storage, so that the generated chips can be quickly and smoothly discharged outward through the grooves 344 and the grooves 351, so that the screw 3 is not blocked by the chips during the locking process and can be quickly screwed into the object 4, which further increases the locking speed and prevents the chips from accumulating. Furthermore, when the screw 3 is screwed into the object 4, part of the chips can be accommodated in the grooves 351 and the recesses 344, thereby increasing the fastening force between the screw 3 and the object 4, and improving the bite force and locking property of the screw 3 after locking, so that the screw 3 will not be easily loosened from the object 4, and a better locking effect can be achieved.

Referring to FIG. 7 , the second preferred embodiment of the present invention still includes the components described in the first embodiment, and its purpose and function are the same as those of the first embodiment, which will not be described in detail here. The special feature of this embodiment is that a plurality of textured portions 35 are disposed on mutually non-adjacent setting surfaces 311, that is, when one setting surface 311 is provided with a textured portion 35, the setting surface 311 adjacent to the one setting surface 311 is not provided with a textured portion 35 and is provided in a smooth state.

Referring to FIG. 8 and FIG. 9, the third preferred embodiment of the present invention still includes the components described in the first embodiment, and its purpose and function are the same as those of the first embodiment, which will not be described in detail here. The special feature of this embodiment is that the screw 3 includes a first tooth segment 34A and a second tooth segment 34B, and the first tooth segment 34A and the second tooth segment 34B are respectively composed of the screw teeth 34, and the first tooth segment 34A and the second tooth segment 34B are spaced from each other and are not intersected, so that the screw 3 is arranged in a double screw tooth segment state, and at least A spiral annular groove 36 is concavely formed on a setting surface 311, and the present embodiment takes a plurality of spiral annular grooves 36 and a plurality of mesh portions 35 alternately formed on the setting surfaces 311 as an example, that is, when a mesh portion 35 is formed on one setting surface 311, a setting surface 311 adjacent to the one setting surface 311 is provided with a spiral annular groove 36, and another setting surface 311 spaced apart from the one setting surface 311 by a setting surface 311 is provided with a mesh portion 35, so that the setting surfaces 311 are provided with the mesh portions 35 and the spiral annular grooves 36 in sequence.

Referring to FIG. 10 , the fourth preferred embodiment of the present invention still includes the components described in the first embodiment, and its purpose and function are the same as those of the first embodiment, which will not be described in detail herein. The special feature of this embodiment is that the textured portion 35 is disposed on a partial surface of at least one setting surface 311, and this embodiment is based on an example in which the textured portion 35 is disposed on a partial surface of a plurality of setting surfaces 311, and the remaining surfaces of the setting surfaces 311 that are not provided with the textured portion 35 are disposed in a smooth state.

To summarize the above, the screw of the present invention has the grooves, the convex teeth and the cutting edges formed on the screw teeth, so as to reduce the locking resistance borne by the screw teeth when they are rotary cut, and effectively cut and destroy the fibers of the object. The grooves are concavely formed on the rod body, so as to greatly increase the chip removal and chip accommodation space, so that the generated chips can be quickly discharged outward through the grooves and the grooves, further reducing the locking resistance, increasing the locking speed, and avoiding the cracking of the object. At the same time, after locking, it can also provide appropriate chip accommodation, which is helpful to strengthen the bite force and locking firmness after locking, so that the screw is not easy to loosen.

However, the above is only to illustrate the preferred embodiment of the present invention, and should not be used to limit the scope of implementation of the present invention. In other words, all simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the invention specification should still fall within the scope of the present invention patent.

(Knowledge) 1: Screw 11: Rod 12: Head 13: Tail 14: Screw thread 141: Upper tooth surface 142: Lower tooth surface 143: Tooth peak 2: Object (Present invention) 3: Screw 31: Rod 32: Head 33: Tail 34: Screw thread 35: Mesh portion 36: Spiral ring groove 31A: Outer peripheral surface 34A: First tooth segment 34B: Second tooth segment 311: Setting surface 341: Upper tooth surface 342: Lower tooth surface 343: Tooth peak 344: Groove 345: Protruding tooth 346: Cutting edge 351: Channel 4: Object

Figure 1 is a schematic diagram of a known screw. Figure 2 is a schematic diagram of a known screw in use. Figure 3 is a schematic diagram of a first preferred embodiment of the present invention. Figure 4 is a schematic diagram of a partial component of the first preferred embodiment. Figure 5 is a cross-sectional view of line A-A of Figure 3. Figure 6 is a schematic diagram of the first preferred embodiment in use. Figure 7 is a schematic diagram of a second preferred embodiment of the present invention. Figure 8 is a schematic diagram of a third preferred embodiment of the present invention. Figure 9 is another schematic diagram of the third preferred embodiment. Figure 10 is a schematic diagram of a fourth preferred embodiment of the present invention.

3: Screws

31: Rod

32: Head

33: Tail

34: Screw thread

35:Network Department

31A: Outer surface

311: Setting surface

341: Upper tooth surface

342: Lower tooth surface

343: Tooth Peak

344: Groove

345: protruding teeth

346: Cutting Edge

351: Slot

Claims (8)

A screw comprises a rod, a first end and a second end formed at opposite ends of the rod, a head disposed at the first end, a tail disposed at the second end, and a plurality of spiral rings disposed on the rod, wherein each of the spiral teeth has an upper tooth surface facing the head, a lower tooth surface facing the tail, and a tooth peak formed at the junction of the upper tooth surface and the lower tooth surface; the characteristics are: The adjacent threads are arranged axially at intervals on the rod to define an outer peripheral surface on the rod, and the outer peripheral surface has a plurality of setting surfaces arranged between the threads, the outer peripheral surface has at least one mesh portion, and the mesh portion is arranged on at least one setting surface, the mesh portion has a plurality of mutually staggered grooves, and the crests of the threads are concavely provided with a plurality of grooves, and a cutting edge is formed around each groove, and a convex tooth is formed between any two adjacent grooves, and the positions of the convex teeth and the grooves provided on any two adjacent threads are exactly opposite. According to the screw described in claim 1, the grooves are arranged in an arc shape. According to the screw described in claim 1, the grooves and the teeth are arranged on part of the thread. According to the screw described in claim 1, a plurality of mesh portions are arranged on adjacent installation surfaces. According to the screw described in claim 1, a plurality of mesh portions are arranged on the spaced setting surface. According to the screw described in claim 1, at least one setting surface has a spiral annular groove concavely provided on it. According to the screw described in claim 1, the patterned portion is arranged on a partial surface of at least one setting surface. According to the screw described in claim 1, the threaded parts define a first thread segment and a second thread segment, and the second thread segment and the first thread segment are spaced apart from each other and are arranged around the rod.

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