JP6160975B1 - gear - Google Patents
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- JP6160975B1 JP6160975B1 JP2016087220A JP2016087220A JP6160975B1 JP 6160975 B1 JP6160975 B1 JP 6160975B1 JP 2016087220 A JP2016087220 A JP 2016087220A JP 2016087220 A JP2016087220 A JP 2016087220A JP 6160975 B1 JP6160975 B1 JP 6160975B1
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Abstract
【課題】現在一般的なラック工具、ホブ工具を用いて少数歯の歯車を製作すると、アンダーカット切り下げが発生し、歯車の強度の低下や滑らかな回転及び伝動ができないという現象が起きる。【解決手段】本発明の歯車は、１歯１歯を１枚歯のインボリュート歯車１２にすることにより、歯車の歯数が少数であっても、アンダーカット切り下げという現象が生じることも無く、小型化しても高強度が得られる。【選択図】図１When a gear having a small number of teeth is manufactured by using a general rack tool or hob tool at present, an undercut is cut down, resulting in a phenomenon that the strength of the gear is reduced and smooth rotation and transmission cannot be performed. The gear according to the present invention has a single tooth and an involute gear 12 so that even if the number of teeth of the gear is small, the phenomenon of undercut reduction does not occur, and the gear is small. High strength can be obtained even if it is changed. [Selection] Figure 1
Description
本発明は、歯車に関するものである。The present invention relates to a gear .
現在一般的なラック工具、ホブ工具を用いて少数歯の歯車を製作すると、アンダーカット切り下げが発生し、歯車の強度の低下や滑らかな回転及び伝動ができないという現象が起きる。 When a gear with a small number of teeth is manufactured using a general rack tool or hob tool at present, undercut cutting occurs, resulting in a phenomenon that the strength of the gear is reduced and smooth rotation and transmission cannot be performed.
歯車で高強度を得るためには歯形を大きくする必要がある。そのためには、歯車全体が大きな物になってしまう。少数歯車にしようとすると、アンダーカット切り下げが発生し歯車の強度が低下する。
本発明は、これらの問題を解決するためのもので、少数歯であっても高強度の軽量化された歯車である。To obtain high strength with gears, it is necessary to increase the tooth profile. For this purpose, the entire gear becomes a large object. When trying to use a small number of gears, undercutting occurs and the strength of the gears decreases.
The present invention is for solving these problems, and is a gear having a high strength and reduced weight even with a small number of teeth.
本発明の歯車は、各歯に１枚歯のインボリュート歯車の歯形曲線を備えた歯車であって、前記１枚歯のインボリュート歯車の歯形曲線が複数、その歯先を外向き内向き交互に向けて隣接し合い、歯車本体の歯先を構成する前記１枚歯のインボリュート歯車の基礎円は、前記歯車本体の基準円に対して内接し、歯車本体の歯底を構成する前記１枚歯のインボリュート歯車の基礎円は、前記歯車体の基準円に対して外接していることを特徴とする。
なお、上記歯車にはたとえば、はすば歯車、内歯車、かさ歯車、ウォーム、ウォームホイール等のほか、ラックも含む。The gear of the present invention is a gear provided with a tooth profile curve of a single-tooth involute gear on each tooth , wherein the tooth profile curve of the single-tooth involute gear has a plurality of teeth and the tooth tips are alternately directed outward and inward. The base circles of the single-tooth involute gears that are adjacent to each other and constitute the tooth tip of the gear body are inscribed with respect to the reference circle of the gear body, and the single-tooth teeth that constitute the tooth bottom of the gear body The basic circle of the involute gear is circumscribed with respect to the reference circle of the gear body .
Note that the gear includes, for example, a helical gear, an internal gear, a bevel gear, a worm, a worm wheel, and a rack.
本発明の歯車は、少数歯であっても、高強度で軽量化できる。Even if the gear of the present invention has a small number of teeth, it can be made strong and lightweight.
大きな物体を回転及びコントロールする際、現行では同等の大きな歯車を用いて行っているのが一般的であるが、本発明の歯形を持つ歯車を用いれば小型化できる。 When a large object is rotated and controlled, it is common to use an equivalent large gear at present, but the size can be reduced by using the gear having the tooth profile of the present invention.
図１は、本発明に係る実施例１の歯形１１及び歯車１０の平面図である。この歯車１０は、図２に示すように１枚歯のインボリュート歯車１２を基準円３に対して、
外向き内向き交互に配置したものであり、図３に示すように基礎円２に接する直線４と、インボリュート曲線との交点５の位置が、１枚歯のインボリュート歯車１２の最大幅となる特徴を利用している。
図１は、これら配置した１枚歯のインボリュート歯車１２の互いに接している所を境に、歯車として成立させたものである。
図５に示す従来の歯車１００は、アンダーカット切り下げという現象が起こるのに対し、図４に示す実施例１の歯車１０は、アンダーカット切り下げが無く、歯厚も厚いため高強度が得られる。FIG. 1 is a plan view of the tooth profile 11 and the gear 10 according to the first embodiment of the present invention. As shown in FIG. 2, the gear 10 has a single-tooth involute gear 12 with respect to the reference circle 3.
As shown in FIG. 3, the position of the intersection 5 between the straight line 4 in contact with the base circle 2 and the involute curve is the maximum width of the single-tooth involute gear 12 as shown in FIG. Is used.
FIG. 1 shows a gear formed on the boundary between the arranged single-tooth involute gears 12.
The conventional gear 100 shown in FIG. 5 has a phenomenon of undercut cutting, whereas the gear 10 of Example 1 shown in FIG. 4 has no undercut cutting and has a large tooth thickness, so that high strength is obtained.
図６は実施例１の歯形１１、図７は従来の歯車１１０を描いている。
下記数１を使い、それぞれの許容荷重をもとめると、
図６に示す歯形１１の許容荷重は、Ｚ＝２０×２２．８×２２．８／６＝１７３３ｍｍ３ Ｐ＝１７３３×１９１／３．９＝８４８７３Ｎ
図７に示す従来の歯形１１０の許容荷重は、Ｚ＝２０×２１．５×２１．５／６＝１５４１ｍｍ３ Ｐ＝１５４１×１９１／１３＝２２６４１Ｎ
８４８７３Ｎ／２２６４１Ｎ≒３．７。よって本発明の歯形１１は従来の歯形１１０より約３．７倍の荷重を加えることができる。6 shows the tooth profile 11 of the first embodiment, and FIG. 7 shows a conventional gear 110.
Using the number 1 below and finding the allowable load for each ,
The allowable load of the tooth profile 11 shown in FIG. 6 is Z = 20 × 22.8 × 22.8 / 6 = 1733 mm 3 P = 1733 × 191 / 3.9 = 84873N
The allowable load of the conventional tooth profile 110 shown in FIG. 7 is: Z = 20 × 21.5 × 21.5 / 6 = 15441 mm 3 P = 1541 × 1911/13 = 222641N
84873N / 22641N≈3.7. Therefore, the tooth profile 11 of the present invention can apply a load about 3.7 times that of the conventional tooth profile 110.
表１に数１の記号及び数値の説明を示す。 Table 1 shows explanations of the symbols and numerical values of Formula 1.
表２に図６図７の符号の数値を示す。 Table 2 shows numerical values of reference numerals in FIGS.
図８に示す実施例２は、本発明の歯形の歯すじ方向をテーパーにした歯車２０である。歯車２０同士を組み合わせることによってバックラッシュを無くし、正逆回転を必要とするものへ利用できる。 Example 2 shown in FIG. 8 is a gear 20 in which the tooth trace direction of the tooth profile of the present invention is tapered. Combining the gears 20 eliminates backlash and can be used for those requiring forward and reverse rotation.
図９に示す実施例３は、本発明の歯形を適用したはすば歯車３０である。この歯車も従来の歯車より高強度を得ることができる。 Example 3 shown in FIG. 9 is a helical gear 30 to which the tooth profile of the present invention is applied. This gear can also obtain higher strength than the conventional gear.
図１０に示す実施例４は、本発明の歯形を適用したラック４０、ピニオン５０である。これらの歯車も従来の歯車より高強度を得ることができる。 Example 4 shown in FIG. 10 is a rack 40 and a pinion 50 to which the tooth profile of the present invention is applied. These gears can also obtain higher strength than conventional gears.
図１１に示す実施例５は、本発明の歯形を適用した内歯車６０である。この歯車も従来の歯車より高強度を得ることができる。 A fifth embodiment shown in FIG. 11 is an internal gear 60 to which the tooth profile of the present invention is applied. This gear can also obtain higher strength than the conventional gear.
図１２に示す実施例６は、本発明の歯形を適用したかさ歯車７０である。この歯車も従来の歯車より高強度を得ることができる。 Example 6 shown in FIG. 12 is a bevel gear 70 to which the tooth profile of the present invention is applied. This gear can also obtain higher strength than the conventional gear.
また、図９〜図１２以外にも、やまば歯車、はすば内歯車、はすばラック、ねじ歯車、ウォーム、ウォームホイール、まがりばかさ歯車、冠歯車、などに本発明の歯形を適用できる。 In addition to FIGS. 9 to 12, the tooth profile of the present invention is applied to helical gears, helical internal gears, helical racks, screw gears, worms, worm wheels, spiral bevel gears, crown gears, and the like. it can.
図１３に示す実施例７は、大きさの異なる１枚歯のインボリュート歯車１２を基準円３に配置した歯車９０である。
基礎円２の大きさを変えることで、１枚歯のインボリュート歯車１２の歯形の大きさも変わり、１回転する中でより大きな強度を必要とするような場合に適用できる。 A seventh embodiment shown in FIG. 13 is a gear 90 in which a single-tooth involute gear 12 having a different size is arranged on a reference circle 3.
By changing the size of the base circle 2, the size of the tooth profile of the single-tooth involute gear 12 is also changed, and this can be applied to cases where greater strength is required during one rotation.
高荷重や高トルクが加わる所に使用される歯車の小型化や軽量化ができる。
歯車の歯すじをテーパーにし組み合わせることによってバックラッシュを無くし、正逆回転を要する大型の印刷機への利用もできる。Gears used in places where high loads and torques are applied can be reduced in size and weight.
By combining the gear teeth with a taper, the backlash can be eliminated and used for a large printing machine that requires forward and reverse rotation.
１ １枚歯のインボリュート曲線
１０ 歯車
１１ 歯形
１２ １枚歯のインボリュート歯車
２ 基礎円
３ 基準円
４ 基礎円に接する直線
５ １枚歯の最大幅を表す点
６ 歯たけ
２０ 歯すじ方向をテーパーにした歯車
３０ はすば歯車
４０ ラック
５０ ピニオン
６０ 内歯車
７０ かさ歯車
９０ 歯車
１００ 従来の歯車
１１０ 従来の歯形1 Involute curve of one tooth 10 Gear 11 Tooth profile 12 Involute gear of one tooth 2 Base circle 3 Reference circle 4 Straight line 5 that touches the base circle Point 6 representing the maximum width of one tooth Teeth 20 Taper direction taper Gear 30 helical gear 40 rack 50 pinion 60 internal gear 70 bevel gear 90 gear 100 conventional gear 110 conventional tooth profile
Claims (1)
前記１枚歯のインボリュート歯車の歯形曲線が複数、その歯先を外向き内向き交互に向けて隣接し合い、
歯車本体の歯先を構成する前記１枚歯のインボリュート歯車の基礎円は、前記歯車本体の基準円に対して内接し、
歯車本体の歯底を構成する前記１枚歯のインボリュート歯車の基礎円は、前記歯車本体の基準円に対して外接していることを特徴とする歯車。 A gear having a tooth profile of involute gear one tooth on each tooth,
A plurality of tooth profile curves of the single-tooth involute gear, the tooth tips thereof are adjacent to each other facing outward and inward alternately,
The basic circle of the single-tooth involute gear constituting the tooth tip of the gear body is inscribed with respect to a reference circle of the gear body,
The gear according to claim 1, wherein a base circle of the single-tooth involute gear constituting a tooth bottom of the gear body is circumscribed with respect to a reference circle of the gear body.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016087220A JP6160975B1 (en) | 2016-04-25 | 2016-04-25 | gear |
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| JP2016087220A JP6160975B1 (en) | 2016-04-25 | 2016-04-25 | gear |
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| JP6160975B1 true JP6160975B1 (en) | 2017-07-12 |
| JP2017198241A JP2017198241A (en) | 2017-11-02 |
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| JP2016087220A Active JP6160975B1 (en) | 2016-04-25 | 2016-04-25 | gear |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50139250A (en) * | 1974-04-24 | 1975-11-07 | ||
| JPS61244966A (en) * | 1985-04-24 | 1986-10-31 | Shigeyoshi Osada | Gear having relative curvature at contact point |
| JP2008291641A (en) * | 2008-06-26 | 2008-12-04 | Ninomiya Sangyo Kk | Multistory parking device |
| JP2013253636A (en) * | 2012-06-06 | 2013-12-19 | Taiyo Kikai Kogyo Kk | Gear and gear design method |
| JP2014059016A (en) * | 2012-09-18 | 2014-04-03 | Minoru Tanaka | Motor with reduction gear and reduction gear |
| JP2016044769A (en) * | 2014-08-25 | 2016-04-04 | スズキ株式会社 | Gear assembling structure |
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2016
- 2016-04-25 JP JP2016087220A patent/JP6160975B1/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50139250A (en) * | 1974-04-24 | 1975-11-07 | ||
| JPS61244966A (en) * | 1985-04-24 | 1986-10-31 | Shigeyoshi Osada | Gear having relative curvature at contact point |
| JP2008291641A (en) * | 2008-06-26 | 2008-12-04 | Ninomiya Sangyo Kk | Multistory parking device |
| JP2013253636A (en) * | 2012-06-06 | 2013-12-19 | Taiyo Kikai Kogyo Kk | Gear and gear design method |
| JP2014059016A (en) * | 2012-09-18 | 2014-04-03 | Minoru Tanaka | Motor with reduction gear and reduction gear |
| JP2016044769A (en) * | 2014-08-25 | 2016-04-04 | スズキ株式会社 | Gear assembling structure |
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| JP2017198241A (en) | 2017-11-02 |
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