JPS5922103B2 - Dust prevention device for floating internal gear set - Google Patents
Dust prevention device for floating internal gear setInfo
- Publication number
- JPS5922103B2 JPS5922103B2 JP56184373A JP18437381A JPS5922103B2 JP S5922103 B2 JPS5922103 B2 JP S5922103B2 JP 56184373 A JP56184373 A JP 56184373A JP 18437381 A JP18437381 A JP 18437381A JP S5922103 B2 JPS5922103 B2 JP S5922103B2
- Authority
- JP
- Japan
- Prior art keywords
- internal
- floating
- wheel
- gear set
- internal gear
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62J—CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS
- B62J13/00—Guards for chain, chain drive or equivalent drive, e.g. belt drive
- B62J13/04—Guards for chain, chain drive or equivalent drive, e.g. belt drive completely enclosing the chain drive or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Gear Transmission (AREA)
- Sealing Devices (AREA)
- Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
- Transmission Devices (AREA)
Description
【発明の詳細な説明】
本発明はベルトまたはチェノ等の伝動帯の自動張力調節
機能を有する伝動装置における内歯歯車を有するリング
状の内接浮動車と、この内接浮動車と噛合する外歯歯車
とよりなる浮動内接歯車組の防塵装置に関するものであ
る。Detailed Description of the Invention The present invention relates to a ring-shaped internal floating wheel having an internal gear in a transmission device having an automatic tension adjustment function of a transmission band such as a belt or a chain, and an external floating wheel meshing with the internal floating wheel. This invention relates to a dustproof device for a floating internal gear set consisting of gears.
第1図および第2図は伝動帯の自動張力調節機能を有す
る伝動装置の一例を示すもので、これは自転車の、駆動
装置に適用したものである。FIGS. 1 and 2 show an example of a transmission device having an automatic tension adjustment function of a transmission band, which is applied to a bicycle drive device.
図中1は7駆動軸、2はこの、駆動軸1に固着した外歯
歯車、3は内周部に内歯3aを設けたリング状の内接浮
動車で、外歯歯車2と浮動状態で内接噛合するものであ
る。In the figure, 1 is a 7 drive shaft, 2 is an external gear fixed to the drive shaft 1, and 3 is a ring-shaped internal floating wheel with internal teeth 3a on the inner periphery, which is in a floating state with the external gear 2. They are internally interlocked.
4は駆動軸1と離間した位置に保持されている被動軸、
5はこの被動軸4に設けたもう一方の伝動車である被動
車、6は前記内接浮動車3の外周部ど被動車5の外周部
にかけ渡した伝動帯であり、この伝動帯はベルトまたは
チェノいずれでもよい。4 is a driven shaft held at a position separated from the drive shaft 1;
Reference numeral 5 denotes a driven wheel which is the other transmission wheel provided on this driven shaft 4, and 6 denotes a transmission band that extends around the outer periphery of the internal floating wheel 3 and the outer periphery of the driven wheel 5, and this transmission band is a belt. Or cheno.
本実施例では歯付きベルト(タイミングベルト)を使用
している。In this embodiment, a toothed belt (timing belt) is used.
この伝動装置の伝動帯6に第1図の矢印Bのような張力
が作用すると、伝動帯6にゆるみがある場合には内接浮
動車3が下方へ偏心移動することにより、伝動帯6のゆ
るみを自動的に吸収する。When tension as shown by arrow B in FIG. 1 acts on the transmission band 6 of this transmission device, if the transmission band 6 is loose, the internal floating wheel 3 moves eccentrically downward, causing the transmission band 6 to Automatically absorbs slack.
この機能が伝動帯の自動張力調節機能である。This function is the automatic tension adjustment function of the transmission band.
しかして上述のような内接浮動車を有する伝動機構を自
転車等の車両に組みつけた場合、上述のように外歯歯車
2と浮動状態で噛合している内接歯車組の内接浮動車3
の内歯3aと外歯歯車2の外歯2aとの間には空隙7が
あるため、この空隙7内に外部から塵埃やその他の異物
が浸入したり、雨水が浸入すると、歯が損傷したり、歯
の摩耗が増大するという問題点があった。However, when a transmission mechanism having an internal floating wheel as described above is assembled into a vehicle such as a bicycle, the internal floating wheel of the internal gear set meshing with the external gear 2 in a floating state as described above. 3
Since there is a gap 7 between the internal teeth 3a of the external gear 2 and the external teeth 2a of the external gear 2, if dust or other foreign matter or rainwater enters the gap 7 from the outside, the teeth will be damaged. There were also problems in that tooth wear increased.
この問題点を解消するため、例えば第3図に示すように
、内接浮動率30両側面に中空円板8をあてがってボル
ト9およびナツト10により固定してこれらの円板8が
外歯歯車2の側面と摺動接触するようにして前記空隙7
を塞ぐ方法もあるが、この方法では円板8が少しでも変
形したり撓んだりすると防塵効果が減少したり、摺動接
触抵抗が増大するなどの欠点があった。In order to solve this problem, for example, as shown in FIG. The gap 7 is in sliding contact with the side surface of 2.
There is also a method of blocking the disc 8, but this method has drawbacks such as a reduction in the dustproof effect and an increase in sliding contact resistance if the disc 8 is even slightly deformed or bent.
本発明は、このような問題点を解決するためになされた
もので、外歯歯車の両側面に中空円板状の案内板を添設
するとともに、この案内板に挾まれて回転する内接浮動
車の両側面に案内板の側面に摺接する円環状のシールリ
ングを設け、浮動状態で噛合する内接歯車組の空隙部を
外部と遮断することにより、噛合部への異物や雨水の浸
入を防ぎ、噛合部に塗着したグリース等の潤滑剤を長期
間保護して歯面の摩耗を極力抑えるとともに、異物を咬
み込むことによる歯の損傷を防止する上に、防塵のだめ
の接触摩擦抵抗を極力小さくして、内接歯車組の噛み合
いの安定および駆動効率の向上を目的とするものである
。The present invention has been made to solve these problems, and includes hollow disc-shaped guide plates attached to both sides of an external gear, and an internal gear that rotates while being sandwiched between the guide plates. Annular seal rings are provided on both sides of the floating wheel that slide against the sides of the guide plate, and the gap between the internal gear set that meshes in the floating state is isolated from the outside, thereby preventing foreign matter and rainwater from entering the meshing part. In addition to protecting the grease and other lubricants applied to the meshing parts for a long period of time and minimizing wear on the tooth surfaces, the contact friction resistance of the dust-proof reservoir prevents tooth damage caused by biting foreign objects. The purpose is to make the internal gear set as small as possible, thereby stabilizing the meshing of the internal gear set and improving drive efficiency.
以下第4図について本発明の詳細な説明する。The present invention will be described in detail with reference to FIG. 4 below.
図中前記した符号と同一の符号は同等のものを示す。In the drawings, the same reference numerals as those described above indicate equivalent parts.
なお11は駆動軸1と一体に連結したクランクアームで
ある。Note that 11 is a crank arm integrally connected to the drive shaft 1.
本発明においては、内接浮動車3の巾を外歯歯車2の巾
よりわずかに小さくし、外歯歯車20両側面にそれぞれ
中空円板状の案内板8をあてがい、これら案内板8と外
歯歯車2を貫通するボルト9およびナツト10により案
内板8を外歯歯車2に固定する。In the present invention, the width of the internal floating wheel 3 is made slightly smaller than the width of the external gear 2, and hollow disc-shaped guide plates 8 are applied to both sides of the external gear 20. The guide plate 8 is fixed to the external gear 2 by bolts 9 and nuts 10 passing through the gear 2.
案内板8の外径は内接浮動車3に歯付きベルト6を巻装
した状態の外径より外歯歯車2と内接浮動車3との噛合
方向において若干外方へはみ出す程度とし、案内板8の
内径は外歯歯車2の歯底径よりもある程度小さいことが
望ましい。The outer diameter of the guide plate 8 is such that it slightly protrudes outward in the meshing direction between the external gear 2 and the internal floating wheel 3 than the outer diameter of the toothed belt 6 wrapped around the internal floating wheel 3, and It is desirable that the inner diameter of the plate 8 is smaller than the root diameter of the external gear 2 to some extent.
次に、内接浮動車3の内歯歯車の歯底円直径より幾分大
径の位置において内接浮動車30両側面に円環状の溝3
bを周設してこの溝3bにゴム、テフロン、ナイロン等
の弾性物製のシールリング12を嵌装し、このシールリ
ング12の一部を内接浮動車3の側面より突出させて、
案内板8の内側面に摺接するようにする。Next, an annular groove 3 is formed on both sides of the internal floating wheel 30 at a position slightly larger than the bottom diameter of the internal gear of the internal floating wheel 3.
A seal ring 12 made of an elastic material such as rubber, Teflon, or nylon is fitted into the groove 3b, and a part of the seal ring 12 is made to protrude from the side surface of the internal floating wheel 3.
It is made to come into sliding contact with the inner surface of the guide plate 8.
次に、上水のように構成した本発明防塵装置の作用幼果
を説明する。Next, the operation of the dust-proofing device of the present invention, which is constructed like water supply, will be explained.
外歯歯車2と一体のクランクアーム11の先端のペダル
(図示せず)を踏み込むと外歯歯車2が回転し、この外
歯歯車2に浮動状態で噛合する内接浮動車3が同一回転
方向へ回転し、さらに伝動帯6を介して被、駆動車5が
回転する。When the pedal (not shown) at the end of the crank arm 11 that is integrated with the external gear 2 is depressed, the external gear 2 rotates, and the internal floating wheel 3 that meshes with the external gear 2 in a floating state rotates in the same direction. The driven wheel 5 further rotates via the transmission band 6.
この場合内接浮動車3には軸がないから、内接浮動率3
0回転中心は外歯歯車20回転中心に対して偏心してい
る。In this case, the inscribed floating wheel 3 has no axis, so the inscribed floating rate is 3
The 0 rotation center is eccentric with respect to the 20 rotation center of the external gear.
このため第3図のものでは案内板8の中心寄りの内面が
常に外歯歯車2の側面と摺動する。Therefore, in the one shown in FIG. 3, the inner surface of the guide plate 8 near the center always slides on the side surface of the external gear 2.
このように案内板8の内面が直接外歯歯車2の側面と摺
動すると摺動摩擦が多かったり、摺動面に間隙が生じて
防塵効果が不完全となるが、第4図に示す本発明装置に
おいては内接浮動車30両側に嵌装したシールリング1
2が内接浮動車3の側面より外方に突出しており、この
シールリング12のみが案内板8の内側面と摺動接触す
るから、これに上り外歯歯車2と内接浮動車3の内歯3
aとの空隙部7を外部から完全に遮断することができる
。If the inner surface of the guide plate 8 directly slides on the side surface of the external gear 2 in this way, there will be a lot of sliding friction and a gap will be created on the sliding surface, making the dustproof effect incomplete. However, the present invention shown in FIG. In the device, a seal ring 1 fitted on both sides of an internal floating wheel 30
2 protrudes outward from the side surface of the internal floating wheel 3, and only this seal ring 12 makes sliding contact with the inner surface of the guide plate 8. Internal teeth 3
It is possible to completely shut off the gap 7 with a from the outside.
また摺動接触抵抗を械らすためにシールリング12の材
質を適宜選択することによって、さらに摺動摩擦抵抗を
非常に小さくすることができる。Further, by appropriately selecting the material of the seal ring 12 in order to reduce the sliding contact resistance, the sliding frictional resistance can be further reduced to a very small value.
また、本発明のように案内板8にシールリング12のみ
が接触するようにすると、このシールリング12を嵌装
した内接浮動車3の側壁は精密加工する必要がなく、表
面の若干の凹凸1df14害とならないから側壁部の仕
上げ加工を節減できるという幼果も得られる。Furthermore, if only the seal ring 12 is brought into contact with the guide plate 8 as in the present invention, there is no need for precision machining of the side wall of the internal floating wheel 3 fitted with this seal ring 12, and the surface may be slightly uneven. 1df14 It is also possible to obtain young fruit that does not cause any harm, so that the finishing work on the side wall can be reduced.
なお本実施例においては、浮動内接歯車組を駆動側とし
た場合について説明したが、この浮動内接歯車組を被動
側にした場合においても本発明を適用できることは云う
までもない。Although the present embodiment has been described with respect to the case where the floating internal gear set is used as the driving side, it goes without saying that the present invention is also applicable to the case where the floating internal gear set is used as the driven side.
第1図は浮動内接歯車組を有するベルト伝動装置の正面
図、第2図は第1図のA−A断面図、第3図は前記伝動
装置に従来の防塵機構を設けた状態を示す断面図、第4
図は本発明の防塵装置を示す断面図である。
1・・・・・・駆動軸、2・・・・・・外歯歯車、3・
・・・・・内接浮動車、3a・・・・・・内歯、4・・
・・・・被動軸、5・・・・・・被動車(伝動車)、6
・・・・・・伝動帯(歯付きベルト)、7・・・・・・
空隙、8・・・・・・案内板、9・・・・・・ボルト、
10・・・・・・ナツト、11・・・・・・クランクア
ーム、12・・・・・・シールリング。Fig. 1 is a front view of a belt transmission device having a floating internal gear set, Fig. 2 is a sectional view taken along line AA in Fig. 1, and Fig. 3 shows the transmission device equipped with a conventional dust-proof mechanism. Cross section, 4th
The figure is a sectional view showing the dustproof device of the present invention. 1... Drive shaft, 2... External gear, 3.
...Internal floating wheel, 3a...Internal tooth, 4...
...Driven shaft, 5...Driven wheel (transmission wheel), 6
......Transmission band (toothed belt), 7...
Gap, 8... Guide plate, 9... Bolt,
10...Nut, 11...Crank arm, 12...Seal ring.
Claims (1)
歯車と噛合させ、離間位置に設けた伝動車と前記内接浮
動車の外周部に伝動帯をかけ渡した伝動装置の浮動内接
歯車組において、前記外歯歯車の両側面に中空円板状の
案内板を添設するとともに、この案内板に挾まれて回転
する内接浮動車の両側面に、案内板の側面に摺接する円
環状のシールリングを設けたことを特徴とする浮動内接
歯車組の防塵装置。1. A transmission device in which a ring-shaped internal floating wheel with internal teeth on the inner periphery is meshed with an externally toothed gear, and a transmission band is stretched between a transmission wheel installed at a separate position and the outer periphery of the internal floating wheel. In the floating internal gear set, hollow disc-shaped guide plates are attached to both sides of the external gear, and guide plates are attached to both sides of the internal floating wheel that rotates while being sandwiched between the guide plates. A dustproof device for a floating internal gear assembly, characterized by having an annular seal ring that slides on the side surface.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56184373A JPS5922103B2 (en) | 1981-11-19 | 1981-11-19 | Dust prevention device for floating internal gear set |
US06/438,499 US4501576A (en) | 1981-11-12 | 1982-11-02 | Power transmission mechanism |
EP82110177A EP0079534B1 (en) | 1981-11-12 | 1982-11-04 | Power transmission mechanism |
DE8282110177T DE3273766D1 (en) | 1981-11-12 | 1982-11-04 | Power transmission mechanism |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56184373A JPS5922103B2 (en) | 1981-11-19 | 1981-11-19 | Dust prevention device for floating internal gear set |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5888259A JPS5888259A (en) | 1983-05-26 |
JPS5922103B2 true JPS5922103B2 (en) | 1984-05-24 |
Family
ID=16152073
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56184373A Expired JPS5922103B2 (en) | 1981-11-12 | 1981-11-19 | Dust prevention device for floating internal gear set |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5922103B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6501143B2 (en) | 2014-06-23 | 2019-04-17 | 株式会社リコー | Drive transmission device and image forming apparatus |
-
1981
- 1981-11-19 JP JP56184373A patent/JPS5922103B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5888259A (en) | 1983-05-26 |
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