JP2017061982A - Gear transmission device - Google Patents

Gear transmission device Download PDF

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JP2017061982A
JP2017061982A JP2015187231A JP2015187231A JP2017061982A JP 2017061982 A JP2017061982 A JP 2017061982A JP 2015187231 A JP2015187231 A JP 2015187231A JP 2015187231 A JP2015187231 A JP 2015187231A JP 2017061982 A JP2017061982 A JP 2017061982A
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gear
tooth
disk
face
face gear
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JP6565537B2 (en
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勝弘 辻本
Katsuhiro Tsujimoto
勝弘 辻本
真矢 山口
Masaya Yamaguchi
真矢 山口
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Aisin Corp
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Aisin Seiki Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a gear transmission device constructed of a pinion gear and a face gear for meshing with the pinion gear, in which a tooth part of the face gear is improved in strength.SOLUTION: A gear transmission device comprises: a pinion gear G2; and a face gear G1 having tooth parts formed protruding from the outer periphery of a disc-shaped disc part 1 in a manner to mesh with the pinion gear G2. Of the two end portions in a tooth trace direction, a reinforcement part 15 is formed over the inner end face formed in the end portion of the face gear G1 and the surface of the disk part 1.SELECTED DRAWING: Figure 2

Description

本発明は、フェースギヤやハイポイドギヤ等のように第１ギヤと第２ギヤとで構成されるギヤ伝動装置に関する。   The present invention relates to a gear transmission configured by a first gear and a second gear, such as a face gear and a hypoid gear.

上記のように構成されたギヤ伝動装置として特許文献１には、円盤部の外周に複数の歯部を突設したフェースギヤと、捩れ状の歯部を有する入力ギヤとを、各々の軸芯を食い違う関係で配置することにより、入力ギヤの回転力をフェースギヤに伝える技術が示されている。   As a gear transmission apparatus configured as described above, Patent Document 1 discloses a face gear having a plurality of teeth protruding from the outer periphery of a disk portion and an input gear having a twisted tooth portion. A technique for transmitting the rotational force of the input gear to the face gear by arranging them in a mutually different relationship is shown.

また、特許文献２には、ハイポイドギヤとピニオンギヤとを、各々の軸芯を食い違う関係で配置することにより、ピニオンギヤの回転力をハイポイドギヤに伝える技術が示されている。   Patent Document 2 discloses a technique for transmitting the rotational force of the pinion gear to the hypoid gear by disposing the hypoid gear and the pinion gear so that their axis centers are different from each other.

特開２０１３‐１５５８０１号公報JP 2013-155801 A 特開２００４‐２１１７６３号公報JP 2004-211763 A

特許文献１あるいは特許文献２に示されるギヤ伝動装置は、高い減速比を得るものである。しかしながら、フェースギヤとハイポイドギヤとの何れも円盤状となるギヤ本体の一方の面の外周部に複数の歯部が形成されるため、各々の歯部の歯厚が回転軸芯に近接する部位ほど、必然的に小さく（薄く）なり、この部位の強度が低下するものである。   The gear transmission shown in Patent Document 1 or Patent Document 2 obtains a high reduction ratio. However, since both the face gear and the hypoid gear are formed with a plurality of tooth portions on the outer peripheral portion of one surface of the disc-shaped gear body, the tooth thickness of each tooth portion is closer to the rotational axis. Inevitably becomes smaller (thin), and the strength of this part is lowered.

軸芯を中心に回転するフェースギヤを例に挙げると、特許文献１の図面に示されるように、複数の歯部が形成される環状の領域より内側（回転軸芯に近い領域）に歯部の歯底より更に回転軸芯に沿う方向に窪む凹状空間が形成される。   As an example of a face gear that rotates about an axis, as shown in the drawing of Patent Document 1, a tooth portion is located on the inner side (region close to the rotation axis) than an annular region where a plurality of tooth portions are formed. A concave space is formed which is recessed further in the direction along the rotation axis than the tooth bottom.

この凹状空間を形成することにより、このフェースギヤに噛合する入力ギヤの歯部の一部（フェースギヤの軸芯に接近する方向に突出する部位）がギヤ本体に干渉する現象を回避している。しかしながら、この凹状空間が形成されることによりフェースギヤの複数の歯部が、歯幅方向で回転軸芯に向かう端部が切り取られた形となり、歯部の強度低下を招く要因になっている。そして、このように強度低下を招く場合には、歯部の変形や歯部の破損にも繋がることになる。   By forming the concave space, a phenomenon in which a part of the tooth portion of the input gear meshing with the face gear (a portion protruding in a direction approaching the axis of the face gear) interferes with the gear body is avoided. . However, by forming this concave space, the plurality of tooth portions of the face gear are cut off at the ends toward the rotation axis in the tooth width direction, which causes a reduction in the strength of the tooth portions. . And when inviting a strength fall in this way, it leads also to a deformation | transformation of a tooth part and a damage of a tooth part.

歯部の強度を考えると、平歯ギヤでは、歯幅を拡大することにより歯部の強度を向上し、歯部に作用する圧力を減ずることも可能であるが、フェースギヤとハイポイドギヤとの何れも歯幅を拡大することは容易ではない。このような理由から、フェースギヤと、フェースギヤに噛合する入力ギヤとのオフセット量を大きくし、フェースギヤと入力ギヤとが噛合する領域の面積を拡大することも考えられる。しかしながら、オフセット量を大きくした場合にはギヤ効率の低下に繋がるものであった。   Considering the strength of the tooth part, it is possible to improve the strength of the tooth part by increasing the tooth width and reduce the pressure acting on the tooth part in the spur gear, but either the face gear or the hypoid gear However, it is not easy to increase the tooth width. For this reason, it is also conceivable to increase the offset amount between the face gear and the input gear meshing with the face gear, and to enlarge the area of the area where the face gear and the input gear mesh. However, when the offset amount is increased, the gear efficiency is reduced.

このような理由から、ピニオンギヤと、これに噛合するフェースギヤとで構成されるギヤ伝動装置において、フェースギヤの歯部の強度の向上が求められている。   For these reasons, in a gear transmission configured with a pinion gear and a face gear meshing with the pinion gear, it is required to improve the strength of the tooth portion of the face gear.

本発明の特徴は、ピニオンギヤと、当該ピニオンギヤに噛み合うよう円盤状のディスク部の外周部に歯部を突出形成したフェースギヤと、を備え、
前記フェースギヤの夫々の歯部における歯筋方向の両端部のうち内径側の端部に形成された内端面と、前記ディスク部の表面とに亘って補強部が形成されている点にある。 A feature of the present invention is provided with a pinion gear, and a face gear having a tooth portion protruding from an outer peripheral portion of a disk-shaped disk portion so as to mesh with the pinion gear,
A reinforcing portion is formed across the inner end surface formed at the inner diameter side end portion of both end portions in the tooth trace direction of each tooth portion of the face gear and the surface of the disk portion.

これによると、複数の歯部のうち歯筋方向で内径側となる内端面と、ディスク部の表面とに亘って補強部が形成されるため、フェースギヤの歯筋方向での内端に力が作用した場合には、その力を補強部で受け止め、変形量を少なくできる。
従って、ピニオンギヤと、これに噛合するフェースギヤとで構成されるギヤ伝動装置において、フェースギヤの歯部の強度が向上し、歯部の変形や破損の抑制が可能となる。 According to this, since the reinforcing portion is formed across the inner end surface which is the inner diameter side in the tooth trace direction among the plurality of tooth portions and the surface of the disk portion, a force is applied to the inner end of the face gear in the tooth trace direction. When this occurs, the force is received by the reinforcing portion, and the amount of deformation can be reduced.
Therefore, in the gear transmission constituted by the pinion gear and the face gear meshing with the pinion gear, the strength of the tooth portion of the face gear is improved, and the deformation and breakage of the tooth portion can be suppressed.

本発明は、前記歯部が所定の歯筋曲線に沿う形状で形成され、前記補強部が前記歯筋曲線に沿ってリブ状に形成されても良い。   In the present invention, the tooth portion may be formed in a shape along a predetermined tooth trace, and the reinforcing portion may be formed in a rib shape along the tooth trace.

これによると、フェースギヤの歯部の歯筋曲線に沿う形状でリブ状に補強部が形成されるため、ピニオンギヤの歯部のうち、フェースギヤの歯部の内周方向に突出する部位が補強部に接触する不都合を抑制して円滑な伝動を実現する。   According to this, since the reinforcing part is formed in a rib shape in a shape along the tooth trace curve of the tooth part of the face gear, a part of the tooth part of the pinion gear that protrudes in the inner peripheral direction of the tooth part of the face gear is reinforced. Smooth transmission is realized by suppressing inconvenience of contact with the part.

本発明は、前記補強部が、前記フェースギヤの軸芯に近い位置ほど、その厚みが薄くなるリブ状に設定されても良い。   In the present invention, the reinforcing portion may be set in a rib shape such that the thickness thereof becomes thinner as the position is closer to the axis of the face gear.

フェースギヤの複数の歯部の歯厚は、その軸芯に近い位置ほど小さく（薄く）設定される。このように歯厚が薄くなる傾向に従って軸芯に近い位置ほど補強部を薄くすることにより、ピニオンギヤの歯部のうち、フェースギヤの歯部の内周方向に突出する部位が、リブ状の補強部に接触する不都合を抑制して円滑な伝動を実現する。   The tooth thickness of the plurality of tooth portions of the face gear is set smaller (thinner) as the position is closer to the axis. By reducing the thickness of the reinforcing portion closer to the axial center in accordance with the tendency of the tooth thickness to become thinner, the portion of the pinion gear tooth portion protruding in the inner circumferential direction of the tooth portion of the face gear has a rib-like reinforcement. Smooth transmission is realized by suppressing inconvenience of contact with the part.

本発明は、前記ディスク部の前記表面を基準にして前記フェースギヤの軸芯に沿う方向に突出する突出部が当該ディスク部の外周部に形成され、前記突出部に対して複数の前記歯部が形成されると共に、前記表面から前記突出部に向けて傾斜する傾斜面を有する厚肉部が前記ディスク部と前記突出部とに亘って一体形成され、
前記補強部が、前記内端面と前記傾斜面と前記表面とに連結しても良い。 According to the present invention, a protruding portion that protrudes in a direction along the axis of the face gear with respect to the surface of the disk portion is formed on an outer peripheral portion of the disk portion, and a plurality of the tooth portions with respect to the protruding portion. And a thick part having an inclined surface inclined from the surface toward the protruding part is integrally formed across the disk part and the protruding part,
The reinforcing portion may be connected to the inner end surface, the inclined surface, and the surface.

これによると、突出部の内周部分に厚肉部が一体形成されることにより、突出部とディスク部との境界部分の強度を高めることが可能になるだけでなく、厚肉部の傾斜面に対して補強部を形成するため、フェースギヤの歯部の強度の向上も実現する。   According to this, since the thick part is integrally formed on the inner peripheral part of the projecting part, it becomes possible not only to increase the strength of the boundary part between the projecting part and the disk part, but also the inclined surface of the thick part. In contrast, since the reinforcing portion is formed, the strength of the tooth portion of the face gear is also improved.

ギヤ伝動装置の平面図である。It is a top view of a gear transmission. ギヤ伝動装置の縦断側面図である。It is a vertical side view of a gear transmission. 第１ギヤの歯部と補強部との断面図である。It is sectional drawing of the tooth | gear part of a 1st gear, and a reinforcement part. 図３のIV−IV線断面図である。It is the IV-IV sectional view taken on the line of FIG. 第１ギヤの歯部と補強部とを示す斜視図である。It is a perspective view which shows the tooth | gear part and reinforcement part of a 1st gear. 第１ギヤの歯部と補強部との拡大平面図である。It is an enlarged plan view of a tooth part and a reinforcing part of the first gear. 別実施形態（ａ）のギヤ伝動装置の平面図である。It is a top view of the gear transmission of another embodiment (a). 別実施形態（ａ）のギヤ伝動装置の縦断側面図である。It is a vertical side view of the gear transmission of another embodiment (a). 別実施形態（ａ）の第１ギヤの歯部と補強部との断面図である。It is sectional drawing of the tooth | gear part and reinforcement part of the 1st gear of another embodiment (a). 図９のＸ−Ｘ線断面図である。FIG. 10 is a sectional view taken along line XX in FIG. 9. 別実施形態（ａ）の第１ギヤの歯部と補強部とを示す斜視図である。It is a perspective view which shows the tooth | gear part and reinforcement part of the 1st gear of another embodiment (a). 別実施形態（ｂ）第１ギヤの歯部と補強部との断面図である。It is sectional drawing of the tooth | gear part and reinforcement part of another embodiment (b) 1st gear. 別実施形態（ｂ）第１ギヤの歯部と補強部との平面拡大図である。It is a plane enlarged view of the tooth | gear part and reinforcement part of another embodiment (b) 1st gear.

以下、本発明の実施形態を図面に基づいて説明する。
〔ギヤ伝動装置の基本構成〕
図１〜図６に示すように、第１軸芯Ｘ１を中心に回転自在なフェースギヤＧ１と、第１軸芯と食い違う位置の第２軸芯Ｘ２を中心に回転自在なピニオンギヤＧ２とを互いに噛み合わせてギヤ伝動装置が構成されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[Basic configuration of gear transmission]
As shown in FIGS. 1 to 6, a face gear G1 that is rotatable about the first axis X1 and a pinion gear G2 that is rotatable about the second axis X2 at a position different from the first axis are mutually connected. The gear transmission is configured by meshing.

このギヤ伝動装置は、ピニオンギヤＧ２を電動モータ等のアクチュエータで駆動回転することにより、フェースギヤＧ１を減速駆動する伝動系に備えられるものである。   This gear transmission is provided in a transmission system for driving the face gear G1 at a reduced speed by driving and rotating the pinion gear G2 with an actuator such as an electric motor.

フェースギヤＧ１は、第１軸芯Ｘ１を中心とする円盤状のディスク部１の中心の駆動孔２に出力軸が挿通状態で連結する。フェースギヤＧ１は、出力軸を介して第１軸芯Ｘ１を中心に回転自在に支持される。ディスク部１の外周部には第１軸芯Ｘ１を中心とする環状の歯部形成領域Ａが形成され、この歯部形成領域Ａに複数の歯部５が形成されている。   The face gear G1 is connected to the drive hole 2 at the center of the disc-shaped disk portion 1 centered on the first axis X1 in an inserted state. The face gear G1 is supported so as to be rotatable about the first axis X1 via the output shaft. An annular tooth forming region A centering on the first axis X1 is formed on the outer periphery of the disk portion 1, and a plurality of tooth portions 5 are formed in the tooth forming region A.

このフェースギヤＧ１は、鍛造やプレス加工により製造されるものを想定しているが、素材の切削により複数の歯部５が製造されるものや、金型を用いた樹脂成形により製造されるものでも良い。   The face gear G1 is assumed to be manufactured by forging or pressing, but a plurality of tooth portions 5 are manufactured by cutting a material, or manufactured by resin molding using a mold. But it ’s okay.

図５、図６に示す如く、フェースギヤＧ１の複数の歯部５の各々は、歯先５ａと、歯面５ｂと、歯底５ｃとで構成されるものであり、これらが歯筋曲線に沿って形成されている。また、複数の歯先５ａは第１軸芯Ｘ１に直交する姿勢の仮想平面上に配置される。   As shown in FIGS. 5 and 6, each of the plurality of tooth portions 5 of the face gear G1 is composed of a tooth tip 5a, a tooth surface 5b, and a tooth bottom 5c. Are formed along. Further, the plurality of tooth tips 5a are arranged on a virtual plane in a posture orthogonal to the first axis X1.

ピニオンギヤＧ２は、シャフト１０に対してネジ状となる２条のギヤ部１１（ピニオンギヤＧ２の歯部）を一体形成したヘリカルギヤとして構成され、第２軸芯Ｘ２を中心に回転自在に支持される。   The pinion gear G2 is configured as a helical gear integrally formed with two gear portions 11 (tooth portions of the pinion gear G2) that are screw-shaped with respect to the shaft 10, and is supported rotatably about the second axis X2.

〔補強部〕
フェースギヤＧ１では、複数の歯部５が形成される歯部形成領域Ａより内径側（第１軸芯Ｘ１に近い領域）のディスク部１に第１ギヤの複数の歯部の歯底５ｃより更に第１軸芯Ｘ１に沿う方向に窪む凹状空間Ｓが形成されている。 (Reinforcement part)
In the face gear G1, the disk portion 1 on the inner diameter side (region close to the first shaft core X1) from the tooth portion forming region A where the plurality of tooth portions 5 are formed is connected to the tooth base 5c of the plurality of tooth portions of the first gear. Furthermore, a concave space S that is recessed in the direction along the first axis X1 is formed.

この凹状空間Ｓが形成されることにより、ピニオンギヤＧ２のギヤ部１１のうち、フェースギヤＧ１の歯部形成領域Ａより内側に（第１軸芯Ｘ１の方向に）に突出する部分と、フェースギヤＧ１の構成部材（基本的にはディスク部１）との干渉が抑制される。尚、凹状空間Ｓが形成されることにより、例えば、ピニオンギヤＧ２のギヤ部１１のうち第１軸芯Ｘ１の方向への突出部分（内端部）を支持するための軸受の配置を容易にする。   By forming the concave space S, a portion of the gear portion 11 of the pinion gear G2 that protrudes inward (in the direction of the first axis X1) from the tooth portion formation region A of the face gear G1, and the face gear Interference with the constituent members of G1 (basically the disk portion 1) is suppressed. In addition, by forming the concave space S, for example, the arrangement of the bearings for supporting the protruding portion (inner end portion) in the direction of the first axis X1 in the gear portion 11 of the pinion gear G2 is facilitated. .

フェースギヤＧ１の複数の歯部５は、第１軸芯Ｘ１に近い部位ほど歯厚が小さく（薄く）設定される。しかも、凹状空間Ｓが形成されているため、複数の歯部５の歯幅方向での内端側が凹状空間Ｓにおいて切り取られた形となり、強度不足から変形や破損を招くこともあった。このような課題を解消するため、歯部５の両端部のうち内径側の端部となる内端面Ｖとディスク部１のディスク面１Ｓ（ディスク部１の表面）との間に補強部１５が形成されている。   The plurality of tooth portions 5 of the face gear G1 are set such that the portion closer to the first axis X1 has a smaller tooth thickness (thinner). Moreover, since the concave space S is formed, the inner end side in the tooth width direction of the plurality of tooth portions 5 is cut out in the concave space S, and deformation or breakage may be caused due to insufficient strength. In order to solve such a problem, the reinforcing portion 15 is provided between the inner end surface V which is the end portion on the inner diameter side of both end portions of the tooth portion 5 and the disk surface 1S of the disk portion 1 (the surface of the disk portion 1). Is formed.

具体的な構成として、ディスク部１の外周には、歯部形成領域Ａと重複する位置にディスク面１Ｓから第１軸芯Ｘ１に沿う方向に立ち上がる状態で厚肉となる突出部３がディスク部１と一体形成されている。尚、ディスク部１と突出部３と歯部５とは一体形成されるものであるが、図３には、これらの位置関係を明らかにするため、歯部５と突出部３とディスク部１とを明示している。   As a specific configuration, on the outer periphery of the disk portion 1, a protruding portion 3 that is thick in a state of rising from the disk surface 1 </ b> S in the direction along the first axis X <b> 1 at a position overlapping the tooth portion forming area A 1 is integrally formed. Although the disk portion 1, the protruding portion 3, and the tooth portion 5 are integrally formed, FIG. 3 shows the tooth portion 5, the protruding portion 3, and the disk portion 1 in order to clarify their positional relationship. It is clearly stated.

内端面Ｖは本来、歯部５の内径側の端部の面であるが、図３〜図５に示す如く、歯部５の内径側の端部（凹状空間Ｓとの境界側の端部）と、突出部３の内径側の端部（凹状空間Ｓとの境界側の端部）とを合わせて内端面Ｖとして説明している。   The inner end surface V is originally the surface of the end portion on the inner diameter side of the tooth portion 5, but as shown in FIGS. 3 to 5, the end portion on the inner diameter side of the tooth portion 5 (the end portion on the boundary side with the concave space S) ) And the end portion on the inner diameter side of the protruding portion 3 (end portion on the boundary side with the concave space S) are described as the inner end face V.

つまり、補強部１５は、フェースギヤＧ１を鍛造やプレス加工により製造する際にディスク面１Ｓから垂直に立ち上がるリブ状に形成されるものであり、歯部５の内端面Ｖとディスク部１のディスク面１Ｓとを連結するように一体形成される。また、この補強部１５は、内端面Ｖのうち歯部５の歯先５ａに近接する位置からディスク面１Ｓに至る領域に対して補強部１５の一辺が連結し、ディスク面１Ｓに対して補強部１５の他の一辺が連結している。更に、内端面Ｖのうち歯部５の歯先５ａに近接する位置からディスク面１Ｓを結ぶ領域に突出側の端部のラインが形成されることにより三角形に形成される領域に形成されている。   That is, the reinforcing portion 15 is formed in a rib shape that rises vertically from the disc surface 1S when the face gear G1 is manufactured by forging or pressing, and the inner end surface V of the tooth portion 5 and the disc of the disc portion 1 are formed. It is integrally formed so as to connect the surface 1S. Further, the reinforcing portion 15 has one side connected to a region from the position close to the tooth tip 5a of the tooth portion 5 to the disk surface 1S in the inner end surface V, and reinforces the disk surface 1S. The other side of the part 15 is connected. Further, the inner end surface V is formed in a region formed in a triangular shape by forming a protruding end line in a region connecting the disk surface 1S from a position close to the tooth tip 5a of the tooth portion 5. .

補強部１５は、第１軸芯Ｘ１に沿う方向視で歯部５の歯筋曲線を延長する領域に形成されることにより曲線状となるものであり、内端面Ｖに対して厚さＴで連結すると共に、第１軸芯Ｘ１に近い位置ほど厚さが薄くなる形状となる。   The reinforcing portion 15 is formed in a region extending the tooth trace curve of the tooth portion 5 as viewed in the direction along the first axis X1, and has a curved shape with a thickness T with respect to the inner end face V. While connecting, it becomes a shape where thickness becomes thin, so that the position near the 1st axis X1.

この補強部１５の厚さＴは、内端面Ｖにおいて歯部５の歯厚と一致する値であっても良い。また、ディスク面１Ｓから立ち上がる高さは、歯部５の歯先５ａと一致する値でも良い。   The thickness T of the reinforcing portion 15 may be a value that matches the tooth thickness of the tooth portion 5 on the inner end face V. The height rising from the disk surface 1S may be a value that matches the tooth tip 5a of the tooth portion 5.

〔実施形態の作用・効果〕
このように、複数の歯部５の全てに補強部１５が形成されることにより、複数の歯部５のうち、歯幅方向での内端位置にピニオンギヤＧ２のギヤ部１１から圧力が作用した場合には、その圧力を補強部１５が受け止め、応力集中を緩和できる。このように応力集中を緩和することにより歯部５の変形を抑制して性能低下を招くことがなく、歯部５の破損を招くこともない。 [Operation / Effect of Embodiment]
In this way, by forming the reinforcing portion 15 on all of the plurality of tooth portions 5, the pressure is applied from the gear portion 11 of the pinion gear G2 to the inner end position in the tooth width direction among the plurality of tooth portions 5. In this case, the reinforcing portion 15 receives the pressure, and the stress concentration can be reduced. By relaxing the stress concentration in this way, the deformation of the tooth portion 5 is suppressed and the performance is not deteriorated, and the tooth portion 5 is not damaged.

また、補強部１５が歯筋曲線に沿う領域に形成され、しかも、補強部１５のうち第１軸芯Ｘ１に近い領域ほど、その厚みを小さくしているため、ピニオンギヤＧ２のギヤ部１１が補強部１５に接触する不都合を招くこともない。   Moreover, since the reinforcement part 15 is formed in the area | region which follows a tooth trace curve, and the area | region close | similar to the 1st axial center X1 among the reinforcement parts 15, the thickness is made small, Therefore The gear part 11 of the pinion gear G2 is reinforced. There is no inconvenience of contacting the portion 15.

尚、補強部１５が、例えば、歯部５の内端面Ｖに連結する部位の厚さＴを歯厚と一致する値まで拡大したものでは、極めて強力な補強を実現する。   In addition, if the reinforcement part 15 expands the thickness T of the site | part connected with the inner end surface V of the tooth part 5, for example to the value which corresponds with a tooth thickness, very strong reinforcement is implement | achieved.

〔別実施形態〕
本発明は、上記した実施形態以外に以下のように構成しても良い（実施形態と同じ機能を有するものには、実施形態と共通の番号、符号を付している）。 [Another embodiment]
In addition to the above-described embodiments, the present invention may be configured as follows (the components having the same functions as those of the embodiments are given the same numbers and symbols as those of the embodiments).

（ａ）図７〜図１１に示すように、フェースギヤＧ１が、ディスク部１の外周においてディスク面１Ｓを基準にして第１軸芯Ｘ１に沿う方向に突出する突出部３と、ディスク面１Ｓとに亘る領域に厚肉部４を備えて構成されている。この厚肉部４は、ディスク面１Ｓから突出部３に向けて傾斜する傾斜面４Ｓを有している。 (A) As shown in FIGS. 7 to 11, the face gear G <b> 1 has a protruding portion 3 protruding in the direction along the first axis X <b> 1 on the outer periphery of the disk portion 1 with respect to the disk surface 1 </ b> S, and the disk surface 1 </ b> S. The thick portion 4 is provided in a region extending over and above. The thick portion 4 has an inclined surface 4S that is inclined from the disk surface 1S toward the protruding portion 3.

この構成においても、実施形態と同様に突出部３の歯部形成領域Ａに対して複数の歯部５が形成され、補強部１５は、歯部５の内端面Ｖと傾斜面４Ｓとディスク部１のディスク面１Ｓ（ディスク部１の表面）とに連結状態で形成されている。   Also in this configuration, a plurality of tooth portions 5 are formed with respect to the tooth portion forming region A of the protruding portion 3 as in the embodiment, and the reinforcing portion 15 includes the inner end surface V of the tooth portion 5, the inclined surface 4S, and the disk portion. 1 disk surface 1S (the surface of the disk portion 1) is connected to the disk surface 1S.

この別実施形態の構成においても、補強部１５は、ディスク面１Ｓから垂直に立ち上がるリブ状であり、歯部５の歯筋曲線を延長した歯筋曲線に沿って形成され、内端面Ｖに対して厚さＴで連結すると共に、第１軸芯Ｘ１に近い位置ほど厚さが薄くなるように形成されている。   Also in the configuration of this other embodiment, the reinforcing portion 15 is a rib-like shape that rises perpendicularly from the disk surface 1S, is formed along a tooth trace curve obtained by extending the tooth trace curve of the tooth portion 5, and is formed with respect to the inner end face V. The thickness T is connected to the first axial center X1 and the thickness is reduced.

このように厚肉部４を形成することにより、ディスク部１と突出部３との境界部分の強度を高めると同時に、補強部１５が歯部５の強度を向上する。   By forming the thick portion 4 in this way, the strength of the boundary portion between the disk portion 1 and the protruding portion 3 is increased, and at the same time, the reinforcing portion 15 improves the strength of the tooth portion 5.

（ｂ）補強部１５の形状としては、実施形態に示した三角形に限るものではなく、例えば、図１２に示すように歯先５ａに連結する位置から緩やかな円弧状に伸びるように形成することや、ディスク部１の半径方向での延出量Ｌを、実施形態のものより短くしても良い。この別実施形態では、ディスク部１の半径方向での補強部１５の延出量Ｌを短くすることにより、補強部１５の延出方向での端部（第１軸芯Ｘ１の方向に伸びる方向での端部）と、ピニオンギヤＧ２のギヤ部１１との接触を抑制しやすくなる。 (B) The shape of the reinforcing portion 15 is not limited to the triangle shown in the embodiment. For example, the reinforcing portion 15 is formed so as to extend in a gentle arc from a position connected to the tooth tip 5a as shown in FIG. Alternatively, the extending amount L in the radial direction of the disk portion 1 may be shorter than that of the embodiment. In this other embodiment, the extension amount L of the reinforcing portion 15 in the radial direction of the disk portion 1 is shortened, whereby the end portion in the extending direction of the reinforcing portion 15 (the direction extending in the direction of the first axis X1). And the contact between the pinion gear G2 and the gear portion 11 of the pinion gear G2.

（ｃ）別実施形態（ｂ）のように補強部１５のディスク部１の半径方向での延出量Ｌを短くした構成では、図１３に示すように、補強部１５の全体の厚さＴを一定にするように構成しても良い。この構成でも、別実施形態（ｂ）で説明したように補強部１５とピニオンギヤＧ２のギヤ部１１との接触が抑制されるため、厚さＴを一定にして補強部１５の強度低下を抑制することも可能となる。 (C) In the configuration in which the extending amount L in the radial direction of the disk portion 1 of the reinforcing portion 15 is shortened as in another embodiment (b), the entire thickness T of the reinforcing portion 15 is shown in FIG. May be configured to be constant. Even in this configuration, since the contact between the reinforcing portion 15 and the gear portion 11 of the pinion gear G2 is suppressed as described in another embodiment (b), the thickness T is kept constant and the strength reduction of the reinforcing portion 15 is suppressed. It is also possible.

本発明は、ディスク部の外周に軸芯に沿う方向に突出する複数の歯部を形成したギヤを有する伝動装置に利用することができる。   INDUSTRIAL APPLICABILITY The present invention can be used for a transmission device having a gear having a plurality of tooth portions protruding in the direction along the axis on the outer periphery of the disk portion.

１ ディスク部
１Ｓ 表面（ディスク面）
３ 突出部
４ 厚肉部
４Ｓ 傾斜面
５ 歯部
１５ 補強部
Ｇ１ フェースギヤ
Ｇ２ ピニオンギヤ
Ｘ１ 軸芯
Ｖ 内端面 1 disc part 1S surface (disc surface)
3 Protruding part 4 Thick part 4S Inclined surface 5 Tooth part 15 Reinforcing part G1 Face gear G2 Pinion gear X1 Shaft core V Inner end face

Claims (4)

ピニオンギヤと、
当該ピニオンギヤに噛み合うよう円盤状のディスク部の外周部に歯部を突出形成したフェースギヤと、を備え、
前記フェースギヤの夫々の歯部における歯筋方向の両端部のうち内径側の端部に形成された内端面と、前記ディスク部の表面とに亘って補強部が形成されているギヤ伝動装置。 With pinion gears,
A face gear having teeth formed on the outer periphery of the disk-shaped disk portion so as to mesh with the pinion gear;
A gear transmission in which a reinforcing portion is formed across an inner end surface formed at an inner diameter side end portion of both end portions in the tooth trace direction of each tooth portion of the face gear and a surface of the disk portion. 前記歯部が所定の歯筋曲線に沿う形状で形成され、前記補強部が前記歯筋曲線に沿ってリブ状に形成されている請求項１に記載のギヤ伝動装置。   The gear transmission according to claim 1, wherein the tooth portion is formed in a shape along a predetermined tooth trace, and the reinforcing portion is formed in a rib shape along the tooth trace. 前記補強部が、前記フェースギヤの軸芯に近い位置ほど、その厚みが薄くなるリブ状に設定されている請求項１又は２に記載のギヤ伝動装置。   3. The gear transmission according to claim 1, wherein the reinforcing portion is set in a rib shape such that a thickness thereof becomes thinner as a position closer to an axis of the face gear. 前記ディスク部の前記表面を基準にして前記フェースギヤの軸芯に沿う方向に突出する突出部が当該ディスク部の外周部に形成され、前記突出部に対して複数の前記歯部が形成されると共に、前記表面から前記突出部に向けて傾斜する傾斜面を有する厚肉部が前記ディスク部と前記突出部とに亘って一体形成され、
前記補強部が、前記内端面と前記傾斜面と前記表面とに連結している請求項１〜３のいずれか一項に記載のギヤ伝動装置。 A protruding portion that protrudes in a direction along the axis of the face gear with respect to the surface of the disk portion is formed on the outer peripheral portion of the disk portion, and a plurality of tooth portions are formed with respect to the protruding portion. In addition, a thick part having an inclined surface inclined from the surface toward the protruding part is integrally formed across the disk part and the protruding part,
The gear transmission as described in any one of Claims 1-3 with which the said reinforcement part is connected with the said inner end surface, the said inclined surface, and the said surface.
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CN108253098A (en) * 2018-02-27 2018-07-06 倍能科技（广州）有限公司 Passive type variable gears speed change gear
JP2021168604A (en) * 2020-04-14 2021-10-28 株式会社シマノ Driving gear of fishing reel

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JP2008232432A (en) * 2007-02-19 2008-10-02 Enplas Corp Injection-molded resin face gear

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JPH04119248A (en) * 1990-09-04 1992-04-20 Mitsubishi Materials Corp Bevel gear and bevel gear device
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JP2008232432A (en) * 2007-02-19 2008-10-02 Enplas Corp Injection-molded resin face gear

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CN108253098A (en) * 2018-02-27 2018-07-06 倍能科技（广州）有限公司 Passive type variable gears speed change gear
JP2021168604A (en) * 2020-04-14 2021-10-28 株式会社シマノ Driving gear of fishing reel
JP7458874B2 (en) 2020-04-14 2024-04-01 株式会社シマノ fishing reel drive gear
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