TWI797709B

TWI797709B - Screw with multiple thread angles

Info

Publication number: TWI797709B
Application number: TW110129287A
Authority: TW
Inventors: 蘇國材; 蘇振榮
Original assignee: 慶達科技股份有限公司
Priority date: 2021-08-09
Filing date: 2021-08-09
Publication date: 2023-04-01
Also published as: TW202307344A

Abstract

A screw with multiple thread angles is characterized in that a threaded portion defines different thread angles from a root to a thread crest in sequence, namely a first thread angle ranging between 70 degrees and 75 degrees, a second thread angle ranging between 37 degrees and 43 degrees, and a third thread angle ranging between 20 degrees and 23 degrees. Notches are recessed into the thread crest of the threaded portion. During a cutting operation of the threaded portion, the third thread angle and the notches help cut a workpiece sharply to facilitate a quick cutting operation and attain a smooth removal of cut chips. The second thread angle and the first thread angle help widen a cutting track caused by the cutting operation gradually so that the threaded portion are continuously drilled into the workpiece by a multi-stage reaming and drilling operation to reduce the screwing resistance and achieve a quick screwing effect.

Description

多夾角螺牙之螺絲Screw with multi-angle thread

本發明係有關於一種螺絲，特別是一種具多夾角螺牙之螺絲。The invention relates to a screw, in particular to a screw with multi-angle screw teeth.

参閱圖1，習知螺絲1包含有一螺頭11，一由該螺頭11向外延伸之桿體12，以及一螺旋環設於該桿體12上之螺牙部13；其中，該螺牙部13具有一由該桿體12向外延伸之上牙面131，一由該桿體12向外延伸且與該上牙面131相接之下牙面132，一形成於該上牙面131與下牙面132間之牙鋒133；鎖合時，於該螺頭11上施予以一旋轉扭力，以連動該螺牙部13切削一物件(圖中未示)，並逐漸帶動該桿體12螺入該物件內，進而達到鎖合定位之效果。Referring to Fig. 1, the conventional screw 1 includes a screw head 11, a rod body 12 extending outwards from the screw head 11, and a screw thread portion 13 with a helical ring arranged on the rod body 12; wherein, the screw The tooth part 13 has an upper tooth surface 131 extending outward from the rod body 12, a lower tooth surface 132 extending outward from the rod body 12 and connecting with the upper tooth surface 131, and a lower tooth surface 132 formed on the upper tooth surface 131 and the tooth front 133 between the lower tooth surface 132; when locking, apply a rotational torque on the screw head 11 to cut an object (not shown) in conjunction with the screw tooth portion 13, and gradually drive the rod The body 12 is screwed into the object, thereby achieving the effect of locking and positioning.

然，實際使用後發現，由於該上牙面131與下牙面132間形成有一夾角13α，該夾角13α皆為相同，其若該夾角α角度較大時，使得切削過程中，除造成該螺牙部13本身之鋒利度降低外，也會導致該等螺牙部13與該物件呈大面積之接觸，除造成該等螺牙部13與物件之摩擦力增加外，同時切削所產生之切屑易積存且無法順利排出於該物件外，如此將使該螺絲1鎖合阻力增加，造成鎖合扭力大幅上升，故相對該螺絲1鎖入時必須施予更大之鎖合扭力方可進行鎖合，導致鎖合速度亦會受到影響而降低外，同時切削該物件所產生之切屑囤積到一定程度後，除了會纏繞與該桿體12上造成阻力外，且切屑也會相互擠壓而形成阻力，實有待改進。However, after actual use, it is found that since an included angle 13α is formed between the upper tooth surface 131 and the lower tooth surface 132, the included angles 13α are all the same. In addition to reducing the sharpness of the thread portion 13 itself, it will also lead to a large area of contact between the thread portion 13 and the object. In addition to increasing the friction between the thread portion 13 and the object, cutting chips generated at the same time It is easy to accumulate and cannot be discharged out of the object smoothly. This will increase the locking resistance of the screw 1 and cause a large increase in the locking torque. Therefore, a greater locking torque must be applied to the screw 1 to lock in. In addition, the locking speed will also be affected and reduced. At the same time, the chips generated by cutting the object will accumulate to a certain extent. In addition to being entangled with the rod body 12 to cause resistance, the chips will also squeeze each other to form Resistance, really needs to be improved.

另外，如果該上牙面131與下牙面132間所形成之夾角13α較小時，雖然會使得該螺牙部13之鋒利度增加，但相對無法提供較足夠之支撐力與該物件進行固定，造成鎖合定位不佳，故實需改善。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 threaded portion 13 will increase, it will not be able to provide sufficient supporting force to fix the object. , resulting in poor locking positioning, so it really needs to be improved.

因此，本發明之目的，是在提供一種多夾角螺牙之螺絲，其能降低鎖合時之阻力，增加排屑之功效，以及達到快速鎖合效果。Therefore, the purpose of the present invention is to provide a screw with multiple angled threads, which can reduce the resistance during locking, increase the effect of chip removal, and achieve a fast locking effect.

於是，本發明多夾角螺牙之螺絲，其包含有一螺頭，一由該螺頭向外延伸之桿體，複數環設於該桿體上之螺牙部，以及一設於該螺牙部上之凹槽；其中，該每一螺牙部具有一連接該桿體之牙底，一由該牙底向外延伸之上牙面段，一由該牙底向外延伸且與該上牙面段相接之下牙面段，及一形成於該上牙面段與下牙面段相接處之牙鋒，該每一螺牙部具有呈相反設置之第一上牙段、第一下牙段，且該第一上、下牙段由該牙底向外延伸且分別定義於該上、下牙面段上，呈相反設置且分別由該第一上、下牙段延伸之第二上牙段、第二下牙段，以及呈相反設置且分別由該第二上、下牙段延伸至該牙峰之第三上牙段、第三下牙段，該第一上、下牙段定義之第一夾角為70~75度、該第二上、下牙段定義之第二夾角為37~43度、該第三上、下牙段定義之第三夾角為20~23度；是以，藉由該螺牙部具有一定角度的該第一夾角、第二夾角及第三夾角設計下，能使該螺牙部在對物件切削時，該第三夾角能具有較佳之鋒利度，達到快速切削進入，而該第一、第二夾角則可在漸進式進入過程中產生之擠壓擴張狀況下，可降低與物件之摩擦力，故能有效增加切削鋒利度，降低鎖合阻力，達到快速鎖合效果，再者，該牙鋒處上凹設有複數凹槽，將可有效提升其排屑功效。Therefore, the screw with multi-angled thread of the present invention includes a screw head, a rod body extending outward from the screw head, a plurality of rings arranged on the screw body on the rod body, and a screw thread part arranged on the screw thread part. Each thread portion has a tooth bottom connected to the rod body, an upper tooth surface section extending outward from the tooth bottom, and a tooth bottom extending outward from the tooth bottom and connecting with the upper tooth The upper tooth surface segment is connected to the lower tooth surface segment, and a tooth front is formed at the junction of the upper tooth surface segment and the lower tooth surface segment. Each thread portion has a first upper tooth segment, a first upper tooth segment, and a first The lower tooth section, and the first upper and lower tooth sections extend outward from the tooth bottom and are respectively defined on the upper and lower tooth surface sections, and the first upper and lower tooth sections are oppositely arranged and respectively extended from the first upper and lower tooth sections. Two upper tooth segments, second lower tooth segments, and oppositely arranged and extending from the second upper and lower tooth segments to the third upper tooth segment and the third lower tooth segment respectively, the first upper and lower teeth The first included angle defined by segment is 70~75 degrees, the second included angle defined by the second upper and lower segment is 37~43 degrees, the third included angle defined by the third upper and lower segment is 20~23 degrees; Therefore, under the design of the first included angle, the second included angle and the third included angle with the threaded portion having a certain angle, the third included angle can have a better sharpness when the threaded portion cuts an object , to achieve fast cutting and entry, and the first and second included angles can reduce the friction with the object under the extrusion and expansion conditions generated during the gradual entry process, so it can effectively increase the cutting sharpness and reduce the locking resistance , to achieve a fast locking effect, and moreover, the upper concave of the tooth front is provided with multiple grooves, which can effectively improve its chip removal effect.

有關本發明之前述及其他技術內容、特點與功效，在以下配合參考圖式之較佳實施例的詳細說明中，將可清楚地明白。The aforementioned and other technical contents, features and effects of the present invention will be clearly understood in the following detailed description of preferred embodiments with reference to the drawings.

参閱圖2、圖3，本發明多夾角螺牙之螺絲3之第一較佳實施例，該螺絲3包含有一螺頭31，一由該螺頭31向外延伸之桿體32，複數環設於該桿體32上之螺牙部33，以及複數設置於該螺牙部33上之凹槽34；其中，該每一螺牙部33具有一連接該桿體32之牙底330，一由該桿體32向外延伸之上牙面段331，一由該桿體32向外延伸且與該上牙面段331相接之下牙面段332，及一形成於該上牙面段331與下牙面段332間之牙鋒333。Referring to Fig. 2 and Fig. 3, the first preferred embodiment of the screw 3 with multi-angled thread teeth of the present invention, the screw 3 includes a screw head 31, a rod body 32 extending outward from the screw head 31, multiple rings The thread portion 33 provided on the rod body 32, and a plurality of grooves 34 provided on the thread portion 33; wherein, each thread portion 33 has a tooth bottom 330 connected to the rod body 32, a An upper tooth surface segment 331 extending outward from the rod body 32, a lower tooth surface segment 332 extending outward from the rod body 32 and connecting with the upper tooth surface segment 331, and a lower tooth surface segment 332 formed on the upper tooth surface segment 331 and the tooth front 333 between the lower tooth surface section 332.

仍續前述，該每一螺牙部33具有相反設置之第一上牙段334a、第一下牙段334b，且該第一上、下牙段334a、334b，由該牙底330向外延伸且分別定義於該上、下牙面段331、332上，呈相反設置且分別由該第一上、下牙段334a、334b延伸之第二上牙段335a、第二下牙段335b，以及呈相反設置且分別由該第二上、下牙段335a、335b延伸至該牙峰333之第三上牙段336a、第三下牙段336b，該第一上、下牙段334a、334b定義之第一夾角為70~75度、該第二上、下牙段335a、335b定義之第二夾角為37~43度、該第三上、下牙段336a、336b定義之第三夾角為20~23度；再者，本實施例中，該第一上、下牙段334a、334b定義一第一長度334L，該第二上、下牙段335a、335b定義一第二長度335L，該第三上、下牙段336a、336b定義一第三長度336L，而該第一、第二、第三長度334L、335L、336L呈相等尺寸設置為例說明。Continuing from the foregoing, each thread portion 33 has a first upper tooth segment 334a and a first lower tooth segment 334b oppositely arranged, and the first upper and lower tooth segments 334a, 334b extend outward from the tooth bottom 330 And respectively defined on the upper and lower tooth surface sections 331, 332, the second upper tooth section 335a, the second lower tooth section 335b, which are oppositely arranged and respectively extended from the first upper and lower tooth sections 334a, 334b, and It is oppositely arranged and extends from the second upper and lower tooth segments 335a, 335b to the third upper tooth segment 336a, the third lower tooth segment 336b of the tooth crest 333, the first upper and lower tooth segments 334a, 334b define The first included angle is 70~75 degrees, the second included angle defined by the second upper and lower teeth segments 335a, 335b is 37~43 degrees, the third included angle defined by the third upper and lower teeth segments 336a, 336b is 20° ~23 degrees; moreover, in the present embodiment, the first upper and lower tooth segments 334a, 334b define a first length 334L, the second upper and lower tooth segments 335a, 335b define a second length 335L, the first The three 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 in equal dimensions for illustration.

仍續前述，該牙鋒333處上凹設有複數凹槽34，且該每一凹槽34具有一凹設於該牙鋒333之排屑面341，一形成於該排屑面341與該上牙面段331相接觸之上切刃342，以及一形成於該排屑面341與該下牙面段332相接觸之下切刃343，同時本實施例中，該排屑面341與該第二上、下牙段335a、335b鄰接狀態等為例說明。Continuing from the foregoing, the tooth front 333 is concavely provided with a plurality of grooves 34, and each groove 34 has a chip removal surface 341 recessed at the tooth front 333, and a chip removal surface 341 formed between the chip removal surface 341 and the chip removal surface 341. The upper cutting edge 342 in contact with the upper tooth surface section 331, and a lower cutting edge 343 formed at the contact between the chip removal surface 341 and the lower tooth surface section 332, and in this embodiment, the chip removal surface 341 and the second tooth surface section Two, the adjoining state of the upper and lower tooth segments 335a, 335b is described as an example.

參閱圖2、圖3、圖4，使用時，其透過該螺絲3末端抵觸於一物件(圖中未示)上，透過該螺頭31施予一下壓扭轉力後，利用該螺牙部33切削該物件，以逐漸帶動該螺牙部33進入該物件內，同時藉由該螺牙部33之第三夾角336α為20~23度之設計，其可使該牙鋒333更為鋒利，增加對該物件之切削能力，使該螺牙部33可以更快速、順利的帶動該桿體32切削並鎖入該物件內，且再加上該凹槽34之設計下，該排屑面341可使切削過程所產生之切屑，經由該排屑面341快速排出，能避免切削積存於該物件中，能避免因為切屑阻塞而造成的阻力增加，同時位於該排屑面341兩側之上切刃342與該下切刃343也相對具有切削之作用，其可將排出之切屑在經過該上切刃342或該下切刃343進行斬切粉碎，避免切屑中的纖維纏繞於該桿體32上，使該螺牙部33後續更容易進入該物件內；另外，該第二夾角335α角度為37~43度其能提供該第一夾角334α足夠之支撐，同時也能降低該螺牙部33與該物件之接觸面積，因此能降低該螺牙部33之鎖設阻力，以及提高該螺牙部33之鎖設速度；而至於該第一夾角334α為70~75度，將可使該螺牙部33具有較佳之支撐力，除了能避免該螺牙部33鎖設過程變形斷裂外，更能使得該螺絲3鎖入該物件後，該螺牙部33與物件能具有較佳之緊固能力，達到穩固鎖設之功效，同時該螺牙部33係利用該第三夾角336α快速鋒利切削進入，搭配該第二夾角335α、第一夾角334α呈現逐漸擴大之角度，故在該螺牙部33旋入過程能產生漸進式擴張該物件，以利後續該螺牙部33得以連續進入，對於降低鎖合阻力具有一定之功效；是以，透過將該螺絲3之螺牙部33區分成第一夾角334α、第二夾角335α、第三夾角336α及該凹槽34之設計下，能使該螺絲3在鎖設過程中，切削鋒利度增加，降低鎖合阻力，以及並且維持鎖設後該螺牙部33對該物件之緊固能力外，同時該凹槽34設置於該牙鋒333上，更能達到排屑之功效。Referring to Fig. 2, Fig. 3, Fig. 4, when in use, it passes through the end of the screw 3 against an object (not shown in the figure), and after applying a pressing torque through the screw head 31, the thread portion 33 is used to Cut the object to gradually drive the threaded portion 33 into the object. At the same time, the third included angle 336α of the threaded portion 33 is designed to be 20-23 degrees, which can make the tooth edge 333 sharper and increase The cutting ability of the object enables the screw thread portion 33 to drive the rod body 32 to cut and lock into the object more quickly and smoothly, and with the design of the groove 34, the chip removal surface 341 can The chips generated in the cutting process can be quickly discharged through the chip removal surface 341, which can avoid the chips from accumulating in the object, and can avoid the increase of resistance caused by chip blocking. At the same time, the cutting edge is located on both sides of the chip removal surface 341 342 and the lower cutting edge 343 also have a relatively cutting effect, which can chop and pulverize the discharged chips passing through the upper cutting edge 342 or the lower cutting edge 343, so as to avoid the fibers in the chips from being entangled on the rod body 32. It is easier for the threaded portion 33 to enter the object later; in addition, the second included angle 335α is 37-43 degrees, which can provide sufficient support for the first included angle 334α, and can also lower the threaded portion 33 and the object. Therefore, the locking resistance of the threaded portion 33 can be reduced, and the locking speed of the threaded portion 33 can be increased; and the first included angle 334α is 70~75 degrees, which can make the threaded portion 33 With better supporting force, in addition to avoiding the deformation and fracture of the threaded part 33 during locking, it can also make the screw 3 locked into the object, and the threaded part 33 and the object can have better fastening ability to achieve stability The effect of locking, at the same time, the thread part 33 is cut into quickly and sharply by using the third included angle 336α, with the second included angle 335α and the first included angle 334α presenting a gradually expanding angle, so the screw thread part 33 is screwed in during the process It can produce gradual expansion of the object, so that the subsequent thread portion 33 can be continuously entered, and has a certain effect on reducing the locking resistance; therefore, by dividing the thread portion 33 of the screw 3 into the first included angle 334α, The design of the second included angle 335α, the third included angle 336α and the groove 34 can increase the cutting sharpness of the screw 3 during locking, reduce the locking resistance, and maintain the threaded portion 33 after locking. In addition to the fastening ability of the object, the groove 34 is arranged on the tooth front 333 at the same time, which can achieve the effect of chip removal.

參閱圖5，本發明多夾角螺牙之螺絲3之第二較佳實施例，該螺絲3包含有螺頭31、桿體32、螺牙部33、凹槽34等構件，且前述構件與功效均與第一實施例相同，恕不詳述，特別是，本實施例中，該螺牙部33與該螺頭31間環設有一第二螺牙部35，故該第二螺牙部35不僅可輔助切削該物件，且在鎖設後，該第二螺牙部35之設計將可提供更高之鎖固能力，使該螺絲3之結合力更佳。 Referring to Fig. 5, the second preferred embodiment of the screw 3 with multiple angled threads of the present invention, the screw 3 includes components such as a screw head 31, a rod body 32, a thread portion 33, a groove 34, and the aforementioned components and functions All are the same as the first embodiment, and will not be described in detail. In particular, in this embodiment, a second thread portion 35 is arranged between the thread portion 33 and the screw head 31, so the second thread portion 35 Not only can it assist in cutting the object, but also after locking, the design of the second thread portion 35 can provide higher locking ability, so that the binding force of the screw 3 is better.

歸納前述，本發明多夾角螺牙之螺絲，其主要在於該螺絲之螺牙部的上牙面段與下牙面段所形成有第一夾角、第二夾角及第三夾角之設計，再加上該牙鋒上凹設有複數凹槽；故透過以上之螺牙部設計，能使得該螺牙部切削鋒利度增加，降低鎖合阻力，同時該凹槽設置於該牙鋒上，更能達到排屑之功效，故的確能達到本發明之目的。 To sum up the above, the screw with multi-angle thread of the present invention mainly lies in the design of the first included angle, the second included angle and the third included angle formed by the upper tooth surface section and the lower tooth surface section of the thread portion of the screw. There are multiple grooves on the upper concave of the tooth front; therefore, through the above design of the thread part, the cutting sharpness of the thread part can be increased, and the locking resistance can be reduced. At the same time, the groove is set on the tooth front, which can better Reach the effect of chip removal, so can really reach the purpose of the present invention.

惟以上所述者，僅為說明本發明之較佳實施例而已，當不能以此限定本發明實施之範圍，即大凡依本發明申請專利範圍及發明說明書內容所作之簡單的等效變化與修飾，皆應仍屬本發明專利涵蓋之範圍內。But the above is only to illustrate the preferred embodiments of the present invention, and should not limit the scope of the present invention, that is, all the simple equivalent changes and modifications made according to the patent scope of the present invention and the content of the description of the invention , should still fall within the scope covered by the patent of the present invention.

[習知] [knowledge]

1:螺絲 1: screw

11:螺頭 11: screw head

12:桿體 12: rod body

13:螺牙部 13: Thread part

131:上牙面 131: upper tooth surface

132:下牙面 132: lower tooth surface

133:牙鋒 133: Ya Feng

13α:夾角 13α: Angle

[本發明] [this invention]

3：多夾角螺牙之螺絲 31：螺頭 32：桿體 33：螺牙部 34：凹槽 330：牙底 331：上牙面段 332：下牙面段 333：牙鋒 334a：第一上牙段 334b：第一下牙段 335a：第二上牙段 335b：第二下牙段 336a：第三上牙段 336b：第三下牙段 334α：第一夾角 335α：第二夾角 336α：第三夾角 334L：第一長度 335L：第二長度 336L：第三長度 341：排屑面 342：上切刃 343：下切刃 35：第二螺牙部 3: Screw with multi-angle thread 31: screw head 32: rod body 33: threaded part 34: Groove 330: tooth bottom 331: upper teeth segment 332: lower tooth surface segment 333: Yafeng 334a: First upper segment 334b: First lower segment 335a: Second upper segment 335b: second lower segment 336a: Third upper segment 336b: third lower segment 334α: first included angle 335α: second included angle 336α: third angle 334L: first length 335L: second length 336L: third length 341: chip removal surface 342: upper cutting edge 343: Lower cutting edge 35: Second screw thread part

圖1為習知之示意圖。圖2為本發明第一較佳實施例之示意圖。圖3為圖2中S-S之剖面示意圖。圖4為本發明第一較佳實施例之剖面示意圖。圖5為本發明第二較佳實施例之示意圖。 Figure 1 is a conventional schematic diagram. Fig. 2 is a schematic diagram of the first preferred embodiment of the present invention. FIG. 3 is a schematic cross-sectional view of S-S in FIG. 2 . Fig. 4 is a schematic cross-sectional view of the first preferred embodiment of the present invention. Fig. 5 is a schematic diagram of a second preferred embodiment of the present invention.

3：多夾角螺牙之螺絲 31：螺頭 32：桿體 33：螺牙部 34：凹槽 330：牙底 331：上牙面段 332：下牙面段 333：牙鋒 334a：第一上牙段 334b：第一下牙段 335a：第二上牙段 335b：第二下牙段 336a：第三上牙段 336b：第三下牙段 341：排屑面 342：上切刃 343：下切刃 3: Screw with multi-angle thread 31: screw head 32: rod body 33: threaded part 34: Groove 330: tooth bottom 331: upper teeth segment 332: lower tooth surface segment 333: Yafeng 334a: First upper segment 334b: First lower segment 335a: Second upper segment 335b: second lower segment 336a: Third upper segment 336b: third lower segment 341: chip removal surface 342: upper cutting edge 343: Lower cutting edge

Claims

一種多夾角螺牙之螺絲，其包含有：一螺頭；一由該螺頭向外延伸之桿體；及複數環設於該桿體之螺牙部，其中，該每一螺牙部具有一連接該桿體之牙底，一由該牙底向外延伸之上牙面段，一由該牙底向外延伸且與該上牙面段相接之下牙面段，及一形成於該上牙面段與下牙面段相接處之牙鋒；其特徵在於：該每一螺牙部具有呈相反設置之第一上牙段、第一下牙段，且該第一上、下牙段由該牙底向外延伸且分別定義於該上、下牙面段上，呈相反設置且分別由該第一上、下牙段延伸之第二上牙段、第二下牙段，以及呈相反設置且分別由該第二上、下牙段延伸至該牙峰之第三上牙段、第三下牙段，該第一上、下牙段定義之第一夾角為70~75度、該第二上、下牙段定義之第二夾角為37~43度、該第三上、下牙段定義之第三夾角為20~23度；另，該牙鋒處上凹設有複數凹槽，且該每一凹槽具有一凹設於該牙鋒之排屑面，一形成於該排屑面與該上牙面段相接觸之上切刃，以及一形成於該排屑面與該下牙面段相接觸之下切刃。 A screw with multiple angled threads, which includes: a screw head; a rod extending outward from the screw head; and A plurality of rings are arranged on the thread portion of the rod body, wherein each thread portion has a tooth bottom connected to the rod body, an upper tooth surface section extending outward from the tooth bottom, and a tooth surface section extending from the tooth bottom to the Extending outward and connecting the lower tooth surface segment with the upper tooth surface segment, and a tooth front formed at the junction of the upper tooth surface segment and the lower tooth surface segment; it is characterized in that: Each thread portion has a first upper tooth section and a first lower tooth section arranged in opposite directions, and the first upper and lower tooth sections extend outward from the tooth bottom and are respectively defined on the upper and lower tooth surface sections Upper, the second upper tooth segment and the second lower tooth segment that are oppositely arranged and respectively extended from the first upper and lower tooth segment, and the oppositely arranged and respectively extended from the second upper and lower tooth segment to the crest of the tooth For the third upper segment and the third lower segment, the first included angle defined by the first upper and lower segment is 70~75 degrees, the second included angle defined by the second upper and lower segment is 37~43 degrees, The third angle defined by the third upper and lower tooth segments is 20~23 degrees; in addition, the tooth front is concavely provided with multiple grooves, and each groove has a chip removal recessed on the tooth front surface, a 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.

根據請求項1所述之多夾角螺牙之螺絲，其中，該第一上、下牙段定義一第一長度，該第二上、下牙段定義一第二長度，該第三上、下牙段定義一第三長度，而該第一、第二、第三長度呈相等尺寸設置。According to the screw with multiple angled threads described in claim 1, wherein, the first upper and lower segments define a first length, the second upper and lower segments define a second length, and the third upper and lower segments define a second length. The tooth segments define a third length, and the first, second, and third lengths are set in equal dimensions.

根據請求項1或請求項2所述之多夾角螺牙之螺絲，其中，該桿體上又環設有一第二螺牙部。According to the screw with multi-angled thread according to claim 1 or claim 2, the rod body is further provided with a second thread portion.

根據請求項1或請求項2所述之多夾角螺牙之螺絲，其中，該排屑面與該第二上、下牙段鄰接。According to claim 1 or claim 2, the screw with multiple angled threads, wherein the chip removal surface is adjacent to the second upper and lower tooth segments.