JPH026372B2 - - Google Patents
Info
- Publication number
- JPH026372B2 JPH026372B2 JP58210996A JP21099683A JPH026372B2 JP H026372 B2 JPH026372 B2 JP H026372B2 JP 58210996 A JP58210996 A JP 58210996A JP 21099683 A JP21099683 A JP 21099683A JP H026372 B2 JPH026372 B2 JP H026372B2
- Authority
- JP
- Japan
- Prior art keywords
- diameter gear
- gear
- resin material
- small
- pinion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Gears, Cams (AREA)
Description
【発明の詳細な説明】
本発明は、精密計器等のギヤトレーンに用いら
れる複合歯車に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a composite gear used in a gear train of a precision instrument or the like.
例えば精密計器のギヤトレーンには、共通のボ
ス部の両端に大径のスパーギヤと小径のピニオン
とが１体に形成されて成る２段歯車が多用されて
いるが、従来の金属製の２段歯車においては、加
工が面倒なために部品のコストが高くつく難点が
あるほか、組付後には、軸受部の潤滑のために注
油が必要な面倒がある。また、従来の樹脂製の２
段歯車においては、大きな負荷応力がかかる小径
のピニオンの歯部に十分な強度を持たせることが
困難で、歯列の劣化や摩耗が生じ易いという問題
点があつた。 For example, two-stage gears consisting of a large-diameter spur gear and a small-diameter pinion integrally formed at both ends of a common boss are often used in the gear trains of precision instruments. However, there are disadvantages in that the cost of the parts is high due to the troublesome machining, and there is also the trouble of having to lubricate the bearings after assembly to lubricate the bearings. In addition, conventional resin 2
In stepped gears, it is difficult to provide sufficient strength to the small-diameter pinion teeth that are subjected to large loads, and the problem is that deterioration and wear of the tooth arrangement are likely to occur.
このため、大きな負荷応力のかかる小径の歯車
に金属材のものを用い、比較的負荷応力の小さい
大径の歯車に樹脂材のものを用いて構成される複
合歯車が提案されている。 For this reason, a composite gear has been proposed in which a small-diameter gear, which is subjected to a large load stress, is made of a metal material, and a large-diameter gear, which is subject to a relatively small load stress, is made of a resin material.
しかしながら、この場合各々材質の異なる歯車
同志を十分な負荷応力に耐え得るように組立加工
しなければならないという問題があつた。 However, in this case, there was a problem in that gears made of different materials had to be assembled so that they could withstand sufficient load stress.
本発明は、上記問題点を解消するためになされ
たものであつて、すなわち、本発明の目的は、製
作コストが安く、かつ十分な成形強度と歯の強度
とを有し、更に、使用時に潤滑油を要しない複合
歯車を提供することにある。 The present invention has been made in order to solve the above-mentioned problems, and the purpose of the present invention is to have low manufacturing cost, sufficient molding strength and tooth strength, and furthermore, when used, An object of the present invention is to provide a composite gear that does not require lubricating oil.
その目的を達成する手段として、本発明の複合
歯車は、金属材の小径歯車に樹脂材の大径歯車が
同軸一体にモールド成型され、該モールド成型時
に、前記大径歯車と前記小径歯車の軸受ボス部が
前記大径歯車と一体に樹脂材により成形されると
ともに、前記小径歯車の歯部における前記大径歯
車寄りの歯列空間が、該大径歯車に一体に形成さ
れた樹脂材よりなる突出部によつて前記モールド
成型時に密に埋められてなり、且つ、前記樹脂材
よりなる軸受ボス部の小径歯車がわ端部は同小径
歯車の端面から突出していることを特徴としてい
る。 As a means for achieving the object, the composite gear of the present invention includes a small diameter gear made of a metal material and a large diameter gear made of a resin material coaxially integrally molded, and at the time of molding, the bearings of the large diameter gear and the small diameter gear are The boss portion is molded integrally with the large-diameter gear from a resin material, and a tooth row space near the large-diameter gear in the tooth portion of the small-diameter gear is formed from a resin material integrally formed with the large-diameter gear. It is characterized in that it is densely filled with the protrusion during molding, and that the end of the bearing boss made of the resin material, which faces the small diameter gear, protrudes from the end face of the small diameter gear.
以下、図示の一実施例に基づいて本発明を説明
する。 The present invention will be described below based on an illustrated embodiment.
実施例の複合歯車は、第１図ないし第４図に示
すように、ボス部１と大径のスパーギヤ部分２と
が、後述する成形金型を用いジユラコン等の熱可
塑性樹脂材により一体成型されたものであつて、
かつ小径のピニオン３は、あらかじめ金属材を以
て成形された上で、上記一体成型時にモールド固
着されたものである。 In the composite gear of the embodiment, as shown in FIGS. 1 to 4, a boss portion 1 and a large-diameter spur gear portion 2 are integrally molded from a thermoplastic resin material such as Juracon using a molding die to be described later. It is something that
The pinion 3, which has a small diameter, is formed in advance from a metal material and then fixed with a mold during the above-mentioned integral molding.
しかして、ピニオン３は、肉部３ａと、連通す
る歯部３ｂとにより形成されると共に、ピニオン
３の軸孔が、上記樹脂材よりなるボス部１中間の
薄肉部に固着されている。 The pinion 3 is formed of a thick part 3a and a communicating tooth part 3b, and the shaft hole of the pinion 3 is fixed to a thin part in the middle of the boss part 1 made of the resin material.
なお、ピニオン３がモールド固着された図示状
態では、ピニオン３のスパーギヤ部分２側半部を
成す歯部３ｂと肉部３ａとが、ボス部１内に埋込
まれると共に、歯部３ｂのボス部１よりの歯列空
間の側端部には、ボス部１の樹脂材と一体の突出
部３ｃが成型時に一体に喰込んでおり、更に、ボ
ス部１のピニオン３がわ端部は、ピニオン３の端
面より突出されて、該突出している部分につば１
ａが形成されて、ピニオン３は該つば１ａによつ
て抜け止めされている。 In the illustrated state in which the pinion 3 is molded and fixed, the tooth portion 3b and flesh portion 3a forming the spur gear portion 2 side half of the pinion 3 are embedded in the boss portion 1, and the boss portion of the tooth portion 3b is embedded in the boss portion 1. A protruding part 3c, which is integral with the resin material of the boss part 1, is integrally bitten into the side end part of the tooth row space from 1 during molding, and furthermore, the end part of the boss part 1 next to the pinion 3 is formed by the pinion. The collar 1 protrudes from the end face of 3, and the collar 1 is attached to the protruding part.
a is formed, and the pinion 3 is prevented from coming off by the collar 1a.
ところで、このように構成された実施例の複合
歯車を成型する際には、第５図に示すように、上
部金型４と下部金型５とを用いるが、下部金型５
の中心孔には、歯車の軸孔を穿開させるためのピ
ン形の内型６が下方から挿入されていて、かつ該
中心孔の上部５ａには、既製の金属製ピニオン３
が嵌着されている。 By the way, when molding the composite gear of the embodiment configured as described above, as shown in FIG. 5, an upper mold 4 and a lower mold 5 are used.
A pin-shaped inner mold 6 for drilling the shaft hole of the gear is inserted from below into the center hole, and a ready-made metal pinion 3 is inserted into the upper part 5a of the center hole.
is fitted.
しかして上方の流し口７から金型に流し込まれ
た樹脂材は、上部金型４の通路４ａを経て、両金
型４，５間の型空間に入り、これにより複合歯車
に成型される。 The resin material poured into the mold from the upper flow port 7 passes through the passage 4a of the upper mold 4 and enters the mold space between the two molds 4 and 5, thereby forming a composite gear.
なお、この成型時には、ピニオン３の歯部３ｂ
に流れ込んで突出部３ｃを形成する樹脂材が、ピ
ニオン３の金属材により冷却固化されるので、ピ
ニオン３の歯列間に溶融樹脂の金型からの漏れに
基づくバリの発生が防止されるメリツトがある。 Note that during this molding, the tooth portion 3b of the pinion 3
The resin material that flows into the mold and forms the protrusion 3c is cooled and solidified by the metal material of the pinion 3, which has the advantage of preventing burrs from forming between the teeth of the pinion 3 due to leakage of molten resin from the mold. There is.
上述した成型加工方法によつて製作された実施
例の複合歯車は、金属材である小径歯車を成型時
において樹脂材の大径歯車と一括して一体成型さ
れているので、その組立加工を簡単かつ容易に行
うことができ、十分な成型強度と歯列強度をもつ
て安価に製作することができる。 The composite gear of the example manufactured by the above-mentioned molding method has a small diameter gear made of a metal material and a large diameter gear made of a resin material and integrally molded together at the time of molding, so the assembly process is easy. Moreover, it can be easily performed, and can be manufactured at a low cost with sufficient molding strength and dentition strength.
また、上述した成型加工方式をもつて製作され
た実施例の複合歯車においては、ピニオン３が金
属製であることから、小径歯車の破損、摩耗、劣
化等の虞れが少ないのはもちろんのこと、ピニオ
ン３が、歯部３ｂの歯列空間への樹脂の一体的な
喰込みにより、軸受ボス部１に強固に固着され
て、回りずれを起す虞れがなく、さらに、つば３
ａで挟み止めされているので、抜けずれを生じる
虞れもなく、ピニオン３は確実に軸受ボス部１に
一体化される。 In addition, in the composite gear of the example manufactured using the above-mentioned molding method, since the pinion 3 is made of metal, there is of course less risk of damage, wear, deterioration, etc. of the small diameter gear. , the pinion 3 is firmly fixed to the bearing boss part 1 by integral biting of the resin into the tooth row space of the tooth part 3b, and there is no risk of the rotation slipping.
Since the pinion 3 is held in place by the pinion a, there is no risk of the pinion 3 coming off and slipping off, and the pinion 3 is reliably integrated into the bearing boss portion 1.
なお、上述した実施例の構成においては、ピニ
オン３の抜け止めのために、ボス部１のピニオン
３の端面から突出している端部につば１ａを形成
させたが、これに替え、第６図に示す実施例のよ
うに、ボス部１の上記突出部分の端面の上記つば
を省略すると共に、ピニオン３のスパーギヤ２寄
りの外周壁または内周壁に凹溝３ｄを成形させ、
その凹溝３ｄ内に樹脂材を喰込ませるように形成
させてもよい。 In the configuration of the embodiment described above, in order to prevent the pinion 3 from coming off, the flange 1a was formed at the end of the boss portion 1 protruding from the end surface of the pinion 3. As in the embodiment shown in FIG. 1, the flange on the end face of the protruding portion of the boss portion 1 is omitted, and a groove 3d is formed on the outer peripheral wall or inner peripheral wall of the pinion 3 near the spur gear 2,
A resin material may be bitten into the groove 3d.
第７図は、本発明に係る複合歯車の使用状態を
示す断面図であつて、これにより同複合歯車の使
用状態を説明する。 FIG. 7 is a cross-sectional view showing the usage state of the composite gear according to the present invention, and the usage state of the composite gear will be explained using this figure.
第７図の使用状態は、複合歯車を精密計器のギ
ヤトレーンに用いたもので、精密計器のシヤーシ
１０に植設して固定された取付軸１１の外周に、
ボス部１が外挿された状態で、複合歯車が軸支さ
れている。この複合歯車は、取付軸１１の基部の
外周に一体に形成された金属フランジ１２と取付
軸１１の先端部の外周に設けられた金属止め輪１
３との間にボス部１が挟持された状態で軸支され
ている。 In the usage state shown in FIG. 7, the composite gear is used in the gear train of a precision instrument, and the outer periphery of the mounting shaft 11 is implanted and fixed to the chassis 10 of the precision instrument.
The composite gear is pivotally supported with the boss portion 1 being extrapolated. This composite gear consists of a metal flange 12 integrally formed on the outer periphery of the base of the mounting shaft 11 and a metal retaining ring 1 provided on the outer periphery of the tip of the mounting shaft 11.
The boss portion 1 is pivotally supported in a sandwiched state between the two.
上記の使用状態において、スパーギヤ部分２背
面の金属フランジ１２と当るボス部１の端面とピ
ニオン３の端面から突出する金属止め輪１３と当
るボス部１の端面は、共に樹脂材で形成されてい
ることから、ピニオン３が金属材であるにも拘ら
ず、上記金属面と当るボス部１の両端面に潤滑油
を必要としない。 In the above usage state, the end surface of the boss portion 1 that contacts the metal flange 12 on the back surface of the spur gear portion 2 and the end surface of the boss portion 1 that contacts the metal retaining ring 13 protruding from the end surface of the pinion 3 are both formed of a resin material. Therefore, even though the pinion 3 is made of a metal material, no lubricating oil is required on both end surfaces of the boss portion 1 that contact the metal surface.
以上述べたように、本発明による複合歯車によ
れば、金属材の小径歯車に樹脂材の大径歯車が同
軸一体にモールド成型され、該モールド成型時
に、前記大径歯車と前記小径歯車の軸受ボス部が
前記大径歯車と一体に樹脂材により形成されると
ともに、前記モールド成型時に金属材の小径歯車
の歯列空間内に大径歯車と一体に樹脂材よりなる
突出部が密に埋め込み形成されるようになつてい
るので、金属材の小径歯車と樹脂材の大径歯車と
の一体化が、密で確実となるばかりでなく、その
前記モールド成型時に簡単かつ容易に一体化が行
え、十分な成型強度と歯列強度を備えた金属と樹
脂による複合歯車を安価に製作することができる
効果がある。 As described above, according to the composite gear of the present invention, a small diameter gear made of a metal material and a large diameter gear made of a resin material are coaxially integrally molded, and during the molding, the bearings of the large diameter gear and the small diameter gear are A boss portion is formed integrally with the large-diameter gear from a resin material, and a protruding portion made of a resin material is formed integrally with the large-diameter gear by being densely embedded in the tooth row space of the small-diameter gear made of metal during the molding process. As a result, the small diameter gear made of metal and the large diameter gear made of resin are not only closely and reliably integrated, but also can be easily and easily integrated during the molding process. This has the effect that a composite gear made of metal and resin with sufficient molding strength and tooth row strength can be manufactured at a low cost.
また、樹脂材よりなる大径歯車と一体の樹脂材
よりなる軸受ボス部の小径歯車がわ端面を、同小
径歯車の端面から突出させるようにしたので、小
径歯車を金属材により形成した構造でありなが
ら、使用時に金属止め輪又は金属フランジと当る
複合歯車のボス部の両端面が共に樹脂材となつて
おり、潤滑油を使用する必要がないという実用上
優れた効果がある。 In addition, the end face of the small diameter gear of the bearing boss made of a resin material that is integrated with the large diameter gear made of a resin material is made to protrude from the end face of the same small diameter gear. However, both end surfaces of the boss portion of the composite gear that come into contact with the metal retaining ring or metal flange during use are made of resin material, which has an excellent practical effect in that there is no need to use lubricating oil.
第１図は、本発明の一実施例を示す複合歯車の
側面図、第２図は同前面図、第３図は、同後面
図、第４図は、同側断面図、第５図は、実施例の
複合歯車の成型に用いられる金型の断面概要図、
第６図は、本発明の他の実施例を示す複合歯車の
側断面図、第７図は、同複合歯車の使用状態の断
面図である。
１…ボス部、１ａ…つば、２…大径歯車として
のスパーギヤ、３…小径歯車としてのピニオン。
FIG. 1 is a side view of a composite gear showing an embodiment of the present invention, FIG. 2 is a front view of the same, FIG. 3 is a rear view of the same, FIG. 4 is a sectional view of the same, and FIG. , a cross-sectional schematic diagram of a mold used for molding the composite gear of the example,
FIG. 6 is a side sectional view of a composite gear showing another embodiment of the present invention, and FIG. 7 is a sectional view of the composite gear in use. 1...Boss part, 1a...Brim, 2...Spur gear as a large diameter gear, 3...Pinion as a small diameter gear.
Claims (1)
一体にモールド成型され、該モールド成型時に、
前記大径歯車と前記小径歯車の軸受ボス部が前記
大径歯車と一体に樹脂材により形成されるととも
に、前記小径歯車の歯部における前記大径歯車寄
りの歯列空間が、該大径歯車に一体に形成された
樹脂材よりなる突出部によつて前記モールド成型
時に密に埋められてなり、且つ、前記樹脂材より
なる軸受ボス部の小径歯車がわ端部は同小径歯車
の端面から突出していることを特徴とする複合歯
車。 ２ 前記ボス部は、その小径歯車の端面から突出
している部分が大径フランジ形のつばに成形され
ている特許請求の範囲第１項記載の複合歯車。 ３ 前記小径歯車は、その大径歯車寄りの周壁
に、前記樹脂材が充填された環溝が凹入成形され
て成る特許請求の範囲第１項又は第２項記載の複
合歯車。[Claims] 1. A large diameter gear made of a resin material is integrally molded coaxially with a small diameter gear made of a metal material, and at the time of molding,
The bearing boss portions of the large-diameter gear and the small-diameter gear are formed integrally with the large-diameter gear from a resin material, and the tooth row space near the large-diameter gear in the tooth portion of the small-diameter gear is The end portion of the bearing boss portion made of the resin material on the side of the small diameter gear is formed by being densely filled with a protrusion made of a resin material integrally formed with the mold, and the end portion of the bearing boss portion made of the resin material is separated from the end face of the small diameter gear. A composite gear that is characterized by its protrusion. 2. The composite gear according to claim 1, wherein a portion of the boss portion protruding from the end face of the small-diameter gear is formed into a large-diameter flange-shaped collar. 3. The composite gear according to claim 1 or 2, wherein the small diameter gear has an annular groove filled with the resin material formed in a peripheral wall thereof near the large diameter gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21099683A JPS60104865A (en) | 1983-11-11 | 1983-11-11 | Compound gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21099683A JPS60104865A (en) | 1983-11-11 | 1983-11-11 | Compound gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60104865A JPS60104865A (en) | 1985-06-10 |
| JPH026372B2 true JPH026372B2 (en) | 1990-02-08 |
Family
ID=16598596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21099683A Granted JPS60104865A (en) | 1983-11-11 | 1983-11-11 | Compound gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60104865A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015205624A (en) * | 2014-04-22 | 2015-11-19 | アイシン・エィ・ダブリュ株式会社 | Drive device for vehicle |
| JP7030195B2 (en) * | 2018-07-19 | 2022-03-04 | 株式会社Fuji | Traveling device |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2627097C2 (en) * | 1976-06-16 | 1978-04-20 | Siemens Ag, 1000 Berlin Und 8000 Muenchen | Perforated tape transport wheel for telex tape punches |
| JPS5932760Y2 (en) * | 1980-04-19 | 1984-09-13 | 松下電工株式会社 | transmission gear |
| JPS58132252U (en) * | 1982-03-02 | 1983-09-06 | 日本サ−ボ株式会社 | gear combination |
-
1983
- 1983-11-11 JP JP21099683A patent/JPS60104865A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60104865A (en) | 1985-06-10 |
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