Screws with multiple angle threads

Abstract

The present invention discloses a screw with a multi-angle thread. The screw thread portion of the screw is designed with a first angle, a second angle, and a third angle. The first angle is 70 to 75 degrees, the second angle is 37 to 43 degrees, and the third angle is 20 to 23 degrees. In addition, a plurality of grooves are provided on the tooth edge of the screw thread portion. Therefore, when the screw thread portion is locked, the third angle and the groove design enable the screw thread portion to be quickly and sharply cut and locked. In addition, the first and second angle designs enable the screw thread portion to produce a state of squeezing and expanding on an object during the progressive locking process, thereby facilitating the subsequent continuous entry of the screw thread portion and reducing the locking resistance, thereby achieving a quick locking effect during use.

Description

Technical Field

[0001] The invention relates to a screw, in particular to a screw with multi-angle thread. Background Art

[0002] See Figure 1 The conventional screw 1 includes a screw head 11, a rod 12 extending outward from the screw head 11, and a thread portion 13 spirally arranged on the rod 12; wherein the thread portion 13 has an upper tooth surface 131 extending outward from the rod 12, a lower tooth surface 132 extending outward from the rod 12 and connected to the upper tooth surface 131, and a tooth edge 133 formed between the upper tooth surface 131 and the lower tooth surface 132; when locking, a rotational torque is applied to the screw head 11 to drive the thread portion 13 to cut an object (not shown in the figure) and gradually drive the rod 12 to screw into the object, thereby achieving the locking and positioning effect.

[0003] However, after actual use, it was found that since an angle 13α is formed between the upper tooth surface 131 and the lower tooth surface 132, and the angle 13α is the same, if the angle α is large, during the cutting process, in addition to reducing the sharpness of the screw thread portion 13 itself, the screw thread portion 13 will also come into contact with the object over a large area, which will increase the friction between the screw thread portion 13 and the object. At the same time, the chips generated by the cutting are easily accumulated and cannot be smoothly discharged from the object. This will increase the locking resistance of the screw 1 and cause a significant increase in the locking torque. Therefore, a greater locking torque must be applied when the screw 1 is locked in order to lock it, which will affect and reduce the locking speed. At the same time, when the chips generated by cutting the object accumulate to a certain extent, they will not only entangle with the rod body 12 and cause resistance, but the chips will also squeeze each other to form resistance, which really needs to be improved.

[0004] In addition, if the angle 13α formed between the upper tooth surface 131 and the lower tooth surface 132 is small, although the sharpness of the thread portion 13 will be increased, it cannot provide sufficient support force to fix with the object, resulting in poor locking positioning, which is in need of improvement. Summary of the Invention

[0005] Therefore, an object of the present invention is to provide a screw with multi-angle threads, which can reduce the resistance during locking, increase the efficiency of chip removal, and achieve a quick locking effect.

[0006] Therefore, the present invention discloses a screw with multi-angle threads, which comprises:

[0007] a conch head;

[0008] a rod extending outwardly from the screw head; and

[0009] A plurality of rings are provided on the thread portion of the rod body, wherein each thread portion has a thread bottom connected to the rod body, an upper thread surface segment extending outward from the thread bottom, a lower thread surface segment extending outward from the thread bottom and connected to the upper thread surface segment, and a thread ridge formed at the junction of the upper thread surface segment and the lower thread surface segment; characterized in that:

[0010] Each screw thread portion has a first upper tooth segment and a first lower tooth segment arranged oppositely, and the first upper and lower tooth segments extend outward from the tooth bottom and are respectively defined on the upper and lower tooth surface segments, a second upper tooth segment and a second lower tooth segment arranged oppositely and extended from the first upper and lower tooth segments, and a third upper tooth segment and a third lower tooth segment arranged oppositely and extended from the second upper and lower tooth segments to the tooth peak, respectively, the first angle defined by the first upper and lower tooth segments is 70 to 75 degrees, the second angle defined by the second upper and lower tooth segments is 37 to 43 degrees, and the third angle defined by the third upper and lower tooth segments is 20 to 23 degrees; in addition, a plurality of grooves are concavely provided on the tooth edge, and each groove has a chip removal surface concave on the tooth edge, an upper cutting edge formed on the chip removal surface in contact with the upper tooth surface segment, and a lower cutting edge formed on the chip removal surface in contact with the lower tooth surface segment.

[0011] As a further improvement of the present invention, the first upper and lower tooth segments define a first length, the second upper and lower tooth segments define a second length, and the third upper and lower tooth segments define a third length, and the first, second and third lengths are set to be equal in size.

[0012] As a further improvement of the present invention, a second threaded portion is formed around the rod body.

[0013] As a further improvement of the present invention, the chip removal surface is adjacent to the second upper and lower tooth segments.

[0014] Compared with the prior art, the advantages of the present invention are:

[0015] The present invention designs the first, second, and third angles of the thread portion to have a certain angle. This allows the thread portion to have better sharpness at the third angle when cutting an object, thereby achieving rapid cutting entry. The first and second angles can reduce friction with the object under the extrusion and expansion conditions generated during the progressive entry process, thereby effectively increasing cutting sharpness, reducing locking resistance, and achieving a rapid locking effect. Furthermore, the thread edge is concavely provided with multiple grooves, which will effectively enhance its chip removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of existing screws;

[0017] Figure 2 is a schematic diagram of a first preferred embodiment of the present invention;

[0018] Figure 3 for Figure 2 Schematic cross-section of the middle SS;

[0019] Figure 4 A cross-sectional schematic diagram of a first preferred embodiment of the present invention;

[0020] Figure 5 FIG. 1 is a schematic diagram of a second preferred embodiment of the present invention.

[0021] Explanation of symbols:

[0022] [Prior art]

[0023] 1: Screw

[0024] 11:Snail head

[0025] 12: Rod body

[0026] 13: Screw thread

[0027] 131: Upper tooth surface segment

[0028] 132: Lower tooth surface segment

[0029] 133: Fangfeng

[0030] 13α: Angle

[0031] [The present invention]

[0032] 3: Screws with multiple angle threads

[0033] 31: screw head

[0034] 32: Rod body

[0035] 33: Screw thread

[0036] 34: Groove

[0037] 330: Tooth bottom

[0038] 331: Upper tooth surface segment

[0039] 332: Lower tooth surface segment

[0040] 333: Fangfeng

[0041] 334a: First upper tooth segment

[0042] 334b: first lower tooth segment

[0043] 335a: Second upper tooth segment

[0044] 335b: Second lower tooth segment

[0045] 336a: Third upper tooth segment

[0046] 336b: third lower tooth segment

[0047] 334α: first angle

[0048] 335α: Second angle

[0049] 336α: The third angle

[0050] 334L: First length

[0051] 335L: Second length

[0052] 336L: third length

[0053] 341: Chip removal surface

[0054] 342: Upper cutting edge

[0055] 343: Lower cutting edge

[0056] 35: Second thread DETAILED DESCRIPTION

[0057] The foregoing and other technical contents, features and effects of the present invention will be clearly understood from the following detailed description of the preferred embodiments with reference to the accompanying drawings.

[0058] See Figure 2 、 Figure 3 , a first preferred embodiment of the multi-angle screw 3 of the present invention, the screw 3 includes a screw head 31, a rod body 32 extending outward from the screw head 31, a plurality of screw thread portions 33 annularly arranged on the rod body 32, and a plurality of grooves 34 provided on the screw thread portion 33; wherein each screw thread portion 33 has a thread bottom 330 connected to the rod body 32, an upper thread surface segment 331 extending outward from the rod body 32, a lower thread surface segment 332 extending outward from the rod body 32 and connected to the upper thread surface segment 331, and a thread edge 333 formed between the upper thread surface segment 331 and the lower thread surface segment 332.

[0059] Continuing with the above, each screw thread portion 33 has a first upper tooth segment 334a and a first lower tooth segment 334b arranged oppositely, and the first upper and lower tooth segments 334a and 334b extend outward from the tooth bottom 330 and are respectively defined on the upper and lower tooth surface segments 331 and 332, and are oppositely arranged and extend from the first upper and lower tooth segments 334a and 334b respectively. A second upper tooth segment 335a and a second lower tooth segment 335b are arranged oppositely and extend from the first upper and lower tooth segments 334a and 334b respectively, and a third upper tooth segment 336a and a third lower tooth segment 336b are arranged oppositely and extend from the second upper and lower tooth segments 335a and 335b to the tooth peak 333. 4b is defined as a first angle of 70 to 75 degrees, the second angle defined by the second upper and lower tooth segments 335a and 335b is 37 to 43 degrees, and the third angle defined by the third upper and lower tooth segments 336a and 336b is 20 to 23 degrees; furthermore, in this embodiment, the first upper and lower tooth segments 334a and 334b define a first length 334L, the second upper and lower tooth segments 335a and 335b define a second length 335L, and the third upper and lower tooth segments 336a and 336b define a third length 336L, and the first, second and third lengths 334L, 335L and 336L are set to be equal in size for illustration.

[0060] Continuing with the above, a plurality of grooves 34 are recessed on the tooth edge 333, and each groove 34 has a chip removal surface 341 recessed on the tooth edge 333, an upper cutting edge 342 formed on the chip removal surface 341 in contact with the upper tooth surface segment 331, and a lower cutting edge 343 formed on the chip removal surface 341 in contact with the lower tooth surface segment 332. At the same time, in this embodiment, the adjacent state of the chip removal surface 341 and the second upper and lower tooth segments 335a and 335b is used as an example for explanation.

[0061] See Figure 2 、 Figure 3 、 Figure 4When in use, the end of the screw 3 is pressed against an object (not shown in the figure), and after a downward torsional force is applied by the screw head 31, the screw thread portion 33 is used to cut the object, so as to gradually drive the screw thread portion 33 into the object. At the same time, the third angle 336α of the screw thread portion 33 is designed to be 20 to 23 degrees, which can make the tooth edge 333 sharper, increase the cutting ability of the object, so that the screw thread portion 33 can drive the rod body 32 to cut and lock into the object more quickly and smoothly, and coupled with the design of the groove 34, the chip removal surface 341 can remove the chips generated in the cutting process. The chips are quickly discharged from the chip discharge surface 341, which can prevent the chips from accumulating in the object and increase the resistance caused by chip blockage. At the same time, the upper cutting edge 342 and the lower cutting edge 343 on both sides of the chip discharge surface 341 also have a cutting effect. The discharged chips can be chopped and crushed when passing through the upper cutting edge 342 or the lower cutting edge 343, thereby preventing the fibers in the chips from being entangled on the rod body 32, making it easier for the screw thread portion 33 to enter the object later. In addition, the second angle 335α is 37 to 43 degrees, which can provide sufficient support for the first angle 334α and also reduce the screw thread. The contact area between the portion 33 and the object can reduce the locking resistance of the thread portion 33 and increase the locking speed of the thread portion 33; and as for the first angle 334α being 70 to 75 degrees, the thread portion 33 can have a better supporting force. In addition to preventing the thread portion 33 from deforming and breaking during the locking process, it can also make the thread portion 33 and the object have a better fastening ability after the screw 3 is locked into the object, achieving a stable locking effect. At the same time, the thread portion 33 uses the third angle 336α to quickly and sharply cut in, and the second angle 335α and the first angle 334α are combined to present a gradually The gradually enlarging angle can gradually expand the object during the screwing process of the thread portion 33, so that the thread portion 33 can be continuously inserted, which has a certain effect on reducing the locking resistance. Therefore, by dividing the thread portion 33 of the screw 3 into the first angle 334α, the second angle 335α, the third angle 336α and the groove 34, the cutting sharpness of the screw 3 can be increased during the locking process, reducing the locking resistance and maintaining the fastening ability of the thread portion 33 to the object after locking. At the same time, the groove 34 is set on the tooth edge 333, which can further achieve the effect of chip removal.

[0062] See Figure 5The second preferred embodiment of the multi-angle screw 3 of the present invention comprises a screw head 31, a rod body 32, a screw thread portion 33, a groove 34 and other components, and the aforementioned components and functions are the same as those of the first embodiment and will not be described in detail. In particular, in this embodiment, a second screw thread portion 35 is provided between the screw thread portion 33 and the screw head 31. Therefore, the second screw thread portion 35 can not only assist in cutting the object, but also, after being locked, the design of the second screw thread portion 35 can provide a higher locking ability, thereby improving the binding force of the screw 3.

[0063] In summary, the multi-angle screw of the present invention is characterized by the design of the upper and lower tooth surface sections of the screw thread portion forming a first angle, a second angle, and a third angle, and the multiple grooves provided on the tooth ridge. Therefore, through the above-mentioned thread design, the cutting sharpness of the thread portion can be increased, and the locking resistance can be reduced. At the same time, the grooves provided on the tooth ridge can further achieve the effect of chip removal, thereby truly achieving the purpose of the present invention.

[0064] However, the above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be used to limit the scope of the present invention. In other words, any simple equivalent changes and modifications made according to the scope of the patent application and the contents of the invention description should still fall within the scope of the patent of the present invention.

Claims

1. A screw with multiple angled threads, comprising: a conch head; a rod extending outwardly from the screw head; and A plurality of rings are provided on the threaded portion of the rod, wherein: Each thread portion has a thread bottom connected to the rod body, an upper thread surface segment extending outward from the thread bottom, a lower thread surface segment extending outward from the thread bottom and connected to the upper thread surface segment, and a thread edge formed at the junction of the upper thread surface segment and the lower thread surface segment; characterized in that: Each screw thread portion has a first upper tooth segment and a first lower tooth segment arranged oppositely, and the first upper and lower tooth segments extend outward from the tooth bottom and are respectively defined on the upper and lower tooth surface segments, a second upper tooth segment and a second lower tooth segment arranged oppositely and extended from the first upper and lower tooth segments, and a third upper tooth segment and a third lower tooth segment arranged oppositely and extended from the second upper and lower tooth segments to the tooth peak, respectively. The first angle defined by the first upper and lower tooth segments is 70 to 75 degrees, the second angle defined by the second upper and lower tooth segments is 37 to 43 degrees, and the third angle defined by the third upper and lower tooth segments is 20 to 23 degrees. Through the design of the third angle, the tooth edge can be made sharper; in addition, a plurality of grooves are concavely provided on the tooth edge, and each groove has a chip removal surface concave on the tooth edge, an upper cutting edge formed on the chip removal surface in contact with the upper tooth surface segment, and a lower cutting edge formed on the chip removal surface in contact with the lower tooth surface segment.

2. The screw with multi-angle thread according to claim 1, characterized in that: The first upper and lower tooth segments define a first length, the second upper and lower tooth segments define a second length, and the third upper and lower tooth segments define a third length, and the first, second, and third lengths are set to be equal in size.

3. The screw with multi-angle thread according to claim 1 or claim 2, characterized in that: A second screw thread portion is annularly arranged on the rod body.

4. The screw with multi-angle thread according to claim 1 or claim 2, characterized in that: The chip removal surface is adjacent to the second upper and lower tooth segments.

Images