Screw

Abstract

The invention discloses a screw, which is mainly characterized in that a plurality of screw teeth arranged along a spiral direction, a spiral ring groove and an accommodating part are arranged on a rod body of the screw, the spiral ring groove and the accommodating part are respectively arranged on an arrangement surface of the rod body, and the spiral ring groove extends along the spiral direction and is positioned between upper tooth surfaces of the plurality of screw teeth and the accommodating part. The accommodating part is provided with a plurality of grooves extending from the lower tooth surfaces of the plurality of threads to the spiral ring groove, and the plurality of grooves are communicated with the spiral ring groove, so that the chip removal and accommodating space is greatly increased through the spiral ring groove and the plurality of grooves, generated chips can be quickly discharged outwards, and the chip removal efficiency is improved. In addition, the grooves and the spiral ring grooves can be used for containing a proper amount of cuttings, so that the occlusion force and the locking property after locking are increased, and meanwhile, the screw is not easy to loosen.

Description

Technical Field

[0001] The invention relates to a screw structure, in particular to a screw which provides sufficient space for chip removal and chip accommodation to reduce locking resistance and increase bite force and locking property. Background Art

[0002] See also Figure 1 and Figure 2 As shown, the existing screw 1 includes a rod body 11, and the rod body 11 has two opposite ends forming a first end and a second end, a head 12 arranged at the first end of the rod body 11, a tail 13 arranged at the second end of the rod body 11, and a spiral ring arranged on the thread portion 14 of the rod body 11, wherein the thread portion 14 extends in a spiral direction, and the thread portion 14 has a plurality of threads 14A arranged between the first end and the second end, and each thread 14A has an upper tooth surface 141 facing the head 12, and a lower tooth surface 142 facing the tail 13 and connected to the upper tooth surface 141. When locking, the tail 13 is first positioned on the surface of an object 2, and then a rotational torque is applied to the head 12, so that the object 2 is peeled by the plurality of threads 14A, and then the screw 1 is gradually driven downward into the object 2, so that the locking operation of the screw 1 can be completed.

[0003] However, after actual use, it was found that there was insufficient space between the rod body 11 and the multiple screw threads 14A for chip accommodation and chip removal, so that the chips generated by the multiple screw threads 14A rotary cutting the object 2 can only be slowly discharged outward along the narrow space between the multiple screw threads 14A and the rod body 11. However, not only does it cause the multiple chips to be discharged too slowly, but it also causes the locking resistance to increase, making it difficult for the screw 1 to be quickly locked into the object 2. If the multiple chips are continuously squeezed, it is more likely to cause the object 2 to crack. In addition, insufficient chip accommodation space will also cause the bite force and locking performance of the screw 1 after locking to be poor, causing the screw 1 to be easily loosened from the object 2, which really needs to be improved. Summary of the invention

[0004] Therefore, the object of the present invention is to provide a screw which can provide sufficient space for chip accommodation and chip removal, thereby reducing the locking resistance and increasing the locking speed, while also improving the bite force and locking property after locking.

[0005] Therefore, the present invention discloses a screw, which includes a rod body, a first end and a second end formed at opposite ends of the rod body, a head disposed at the first end, a tail disposed at the second end, and a spiral ring disposed on a thread portion of the rod body, wherein the thread portion is disposed along a spiral direction and has a plurality of threads disposed between the first end and the second end, and each thread has an upper thread surface facing the head, and a lower thread surface facing the tail;

[0006] When adjacent screw threads are arranged at intervals along an axial direction, the rod body forms a setting surface on the outer circumferential surface, and a spiral annular groove and a receiving portion are recessed on the setting surface. The spiral annular groove extends along the spiral direction of the screw thread portion and is located between at least one upper tooth surface and the receiving portion. The receiving portion is arranged along the spiral direction of the screw thread portion and has a plurality of concave grooves. The plurality of concave grooves extend along the axial direction and from at least one lower tooth surface toward the spiral annular groove and are connected to the spiral annular groove.

[0007] As a further improvement of the present invention, the spiral annular groove is arranged between some of the thread teeth.

[0008] As a further improvement of the present invention, a plurality of the grooves are arranged between some of the thread teeth.

[0009] As a further improvement of the present invention, the plurality of grooves and the spiral annular groove have different depths.

[0010] As a further improvement of the present invention, the rod body defines a center line, and the extension direction of the plurality of grooves is arranged parallel to the center line.

[0011] As a further improvement of the present invention, the rod body defines a center line, and the extension direction of the plurality of grooves is arranged obliquely to the center line.

[0012] As a further improvement of the present invention, the spiral annular groove is arranged in an arc shape.

[0013] As a further improvement of the present invention, a plurality of the grooves are arranged in an arc shape.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] When the screw of the present invention is locked, the space for chip accommodation and chip removal is greatly increased through the multiple grooves and the spiral ring groove, so that the generated chips can not only move outward along the spiral ring groove and the multiple screw teeth, but also enter the multiple grooves from the spiral ring groove and be quickly discharged outward, which not only greatly reduces the generation of locking resistance, improves the locking speed, and avoids material cracking. Moreover, after locking, part of the chips can be accommodated in the multiple grooves and the spiral ring groove, which can further increase the fastening force between the screw and the object, thereby improving the bite force and locking performance after locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the existing screws.

[0017] Figure 2 It is a schematic diagram of the use status of existing screws.

[0018] Figure 3 It is a stereogram of a first preferred embodiment of the present invention.

[0019] Figure 4 It is a cross-sectional view of local components of the first preferred embodiment.

[0020] Figure 5 It is a schematic diagram of the usage status of the first preferred embodiment.

[0021] Figure 6 It is a stereogram of a second preferred embodiment of the present invention. Fig. 6A yes Figure 6 Magnified image of .

[0022] Explanation of symbols:

[0023] (Prior Art)

[0024] 1: Screw

[0025] 11: Rod body

[0026] 12: Head

[0027] 13: Tail

[0028] 14: Screw thread

[0029] 14A: Screw thread

[0030] 141: Upper tooth surface

[0031] 142: Lower tooth surface

[0032] 2: Object

[0033] (The present invention)

[0034] 3: Screws

[0035] 31: Rod body

[0036] 32: Head

[0037] 33: Tail

[0038] 34: Screw thread

[0039] 35: Spiral ring groove

[0040] 36: Accommodation

[0041] 311: Setting the surface

[0042] 34A: Screw thread

[0043] 341: Upper tooth surface

[0044] 342: Lower tooth surface

[0045] 361: Groove

[0046] 35D: Maximum depth of spiral groove

[0047] 361D: Maximum depth of groove

[0048] R: Centerline

[0049] 4: Object DETAILED DESCRIPTION

[0050] The above and 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.

[0051] See also Figure 3 and Figure 4 As shown in the first preferred embodiment of the present invention, the screw 3 includes a rod body 31 defining a center line R, and the rod body 31 has a first end and a second end formed at opposite ends, a head 32 disposed at the first end of the rod body 31, a tail 33 disposed at the second end of the rod body 31, a screw thread portion 34 disposed on the rod body 31 in a spiral ring, and a spiral ring groove 35 and a receiving portion 36 respectively recessed on the rod body 31, the screw thread portion 34 extending along a spiral direction, and The screw thread portion 34 has a plurality of screw threads 34A disposed between the first end and the second end. When adjacent screw threads 34A are spaced apart along an axial direction, the rod body 31 forms a setting surface 311 located between the plurality of screw threads 34A on the outer peripheral surface, and the spiral annular groove 35 and the accommodating portion 36 are recessed on the setting surface 311. In the present embodiment, the spiral annular groove 35 is disposed between 5 and 6 screw threads 34A, and the accommodating portion 36 is disposed between 4 and 5 screw threads 34A.

[0052] Still continuing the above, 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 are respectively extended outwardly from the rod body 31 and connected. In addition, the spiral ring groove 35 extends along the spiral direction of the screw thread portion 34 and is located between at least one upper tooth surface 341 and the accommodating portion 36. The accommodating portion 36 is arranged along the spiral direction of the screw thread portion 34. The accommodating portion 36 has There are a plurality of grooves 361 extending along the axial direction, and the plurality of grooves 361 extend from at least one lower tooth surface 342 toward the spiral annular groove 35 and are connected to the spiral annular groove 35. In this embodiment, the extension direction of the plurality of grooves 361 is arranged parallel to the center line R of the rod body 31, and the spiral annular groove 35 and the plurality of grooves 361 are arranged in an arc shape. In addition, the maximum depth 361D of the plurality of grooves 361 is different from the maximum depth 35D of the spiral annular groove 35, that is, Figure 4 shown.

[0053] See also Figure 3 , Figure 4 and Figure 5As shown, when the screw 3 is locked, the tail portion 33 is first positioned against the surface of an object 4, and then a rotational torque is applied to the head portion 32 so that the object 4 is cut downwardly through the tail portion 33 and the plurality of screw teeth 34A. At this time, the rod body 31 is provided with a plurality of recessed grooves 361 and the spiral annular groove 35, so that the generated chips can increase the chip holding space through the spiral annular groove 35 during the process of moving outward along the plurality of screw teeth 34A. At the same time, the plurality of chips can also enter the plurality of recessed grooves 361 through the spiral annular groove 35, which is more conducive to quickly discharging a large amount of chips outward. In this way, not only the locking resistance is greatly reduced, but also the screw 3 will not be obstructed by the multiple chips during the screwing process and can be quickly screwed into the object 4, thereby improving the locking speed. At the same time, it can also avoid the problem of the object 4 being cracked due to the accumulation and squeezing of the multiple chips. Moreover, after the screw 3 is screwed into the object 4, part of the chips can be accommodated in the multiple grooves 361 and the spiral ring groove 35, which can increase the fastening force between the screw 3 and the object 4, thereby strengthening the bite force and locking property after locking, and effectively preventing the screw 3 from loosening from the object 4.

[0054] See also Figure 6 and Fig. 6A As shown, 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 repeated here. The special feature of this embodiment is that the extension direction of the multiple grooves 361 is inclined to the center line R of the rod body 31, and the multiple grooves 361 can be designed with different inclination directions according to actual use requirements. Therefore, when the extension direction of the multiple grooves 361 is inclined to the center line R, the multiple chips are more likely to enter the spiral ring groove 35 and the multiple grooves 361 as the screw 3 is rotated to lock, so that the multiple chips can be discharged quickly and smoothly. At the same time, the multiple grooves 361 and the spiral ring groove 35 can also accommodate chips in time, so that the bite force and locking property of the screw 3 after locking are better.

[0055] To summarize the above, the screw of the present invention is provided with the spiral annular groove and the accommodating portion through the setting surface of the rod body, the spiral annular groove is located between at least one upper tooth surface and the accommodating portion, and is extended and recessed along the spiral direction of the thread portion, and the groove of the accommodating portion extends axially from at least one lower tooth surface toward the spiral annular groove, so that a plurality of the grooves are connected with the spiral annular groove. In addition to greatly increasing the chip removal and chip accommodation space, the generated chips can also be quickly discharged to the outside, which is more conducive to reducing the locking resistance and improving the locking speed. At the same time, after locking, it can also accommodate appropriate chips, thereby increasing the bite force and locking property after locking, so that the screw is not easy to loosen.

[0056] The above description is only for explaining the preferred embodiments of the present invention, and it cannot be used to limit the scope of the present invention. That is, all simple equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the invention specification should still fall within the scope of the patent of the present invention.

Claims

1. A screw, comprising 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 spiral ring disposed at the threaded portion of the rod, wherein: The screw thread portion is arranged along a spiral direction and has a plurality of screw threads arranged between the first end and the second end, and each screw thread has an upper thread surface facing the head portion and a lower thread surface facing the tail portion; the characteristics are: When adjacent screw threads are arranged at intervals along an axial direction, the rod body forms a setting surface on the outer circumferential surface, and a spiral annular groove and a receiving portion are recessed on the setting surface. The spiral annular groove extends along the spiral direction of the screw thread portion and is located between at least one upper tooth surface and the receiving portion. The receiving portion is arranged along the spiral direction of the screw thread portion and has a plurality of concave grooves. The plurality of concave grooves extend along the axial direction and from at least one lower tooth surface toward the spiral annular groove and are connected to the spiral annular groove.

2. The screw according to claim 1, characterized in that: The spiral annular groove is arranged between some of the screw teeth.

3. The screw according to claim 1, characterized in that: A plurality of the grooves are arranged between some of the thread teeth.

4. The screw according to claim 1, characterized in that: The plurality of grooves and the spiral annular groove have different depths.

5. The screw according to claim 1, characterized in that: The rod body defines a center line, and the extension directions of the plurality of grooves are arranged parallel to the center line.

6. The screw according to claim 1, characterized in that: The rod body defines a center line, and the extension directions of the plurality of grooves are arranged obliquely to the center line.

7. The screw according to claim 1, characterized in that: The spiral annular groove is arranged in an arc shape.

8. The screw according to claim 1, characterized in that: A plurality of the grooves are arranged in an arc shape.

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