JP2004044726A

JP2004044726A - Reduction gear

Info

Publication number: JP2004044726A
Application number: JP2002204390A
Authority: JP
Inventors: Nobuo Yamada; 山田　伸雄
Original assignee: Nihon Technica Co Ltd
Current assignee: Nihon Technica Co Ltd
Priority date: 2002-07-12
Filing date: 2002-07-12
Publication date: 2004-02-12
Anticipated expiration: 2022-07-12
Also published as: JP4017145B2

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a composite noise and vibration are generated when adopting, as an apparatus for moving a vehicle seat, a conventional reduction gear comprising: an input shaft having a cog section being provided in a casing; a gear having an outer cog section that fits to a cog section in an input shaft; a washer being provided at both the boss sections of the gear; and an output shaft having a cog section that fits to the inner cog section of the gear being extended to the outside of the casing that penetrates the gear and the washer. <P>SOLUTION: The reduction gear comprises: an input shaft having the cog section provided in the casing of the reduction gear; the gear having the outer cog section fitted to the cog section of the input shaft and a first locking section such as a waveform on the side of a shoulder section; a spring washer having a locking section having a second locking section such as a projecting piece provided at both the boss sections of the gear; and the output shaft having the cog section fitted to the inner cog section of the gear extending to the outside of the casing that penetrates the spring washer having the gear and the locking section. The first and second locking sections can be brought into contact each other, thus reducing noise and/or vibration and securing silence in a vehicle and the smooth movement of the seat. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
この発明は、主として、車輌のシートに使用される小型の減速機に関する。
【０００２】
【従来の技術】
従来、この種の減速機は、図１０に示す構成が知られている。その概要を説明すると、減速機のケーシンク゛１０００に、外側より歯部１００１ａを備えた入力軸１００１を挿設する。この入力軸１００１の歯部１００１ａには、ケーシンク゛１０００に軸承した外周面に外側歯部１００２ａを備えた歯車１００２が噛合される。尚、この歯車１００２は両ホ゛ス部１００２ｃ、１００２ｃに設けたワッシャ１００３、１００３を介してケーシンク゛１０００に軸承されており、当該歯車１００２のスムース゛な回転と、ケーシンク゛１０００の内面と、歯車１００２とで発生する騒音回避を図る。前記歯車１００２及びワッシャ１００３、１００３に貫設し、かつ当該ケーシンク゛外に延設されたこの歯車１００２の内側歯部１００２ｂ（スリット）に噛合する歯部１００４ａを備えた出力軸１００４とで構成されており、入力軸１００１からの回転は、この入力軸１００１に設けた歯部１００１ａと噛合する外側歯部１００２ａとを介して歯車１００２に減速して伝達される。この減速された回転は、この内側歯部１００２ｂと噛合する歯部１００４ａ（スリット）を介して出力軸１００４（従動軸）に伝達される。この動力（回転）の伝達過程で、歯部１００１ａと外側歯部１００２ａとの噛合わせ騒音と、内側歯部１００２ｂと歯部１００４ａとの噛合わせ騒音とが、耳障りとなること、またこの噛合わせ騒音に、ワッシャ１００３、１００３と歯車１００２の両肩部側面１００２ｄ、１００２ｄ及びケーシンク゛１０００の内面１０００ａ、１０００ａとによる摺接騒音が一緒となることで、その耳障りは一層顕著となる。そして、この耳障り（騒音）の解消手段として、オイルを充填する構成も採用されているが、十分とはいえない。その一例を説明すると、この減速機を、車輌のシートの移動を図る装置として採用した場合は、これらの複合的な騒音は、大変問題となる。何故ならば、シートの移動は、通常、車輌が停止している状況で実行されるので、この騒音が気になり易いこと、またこの減速機を構成する部品の精度誤差で発生する騒音等解消に問題を残すこと、等改良が強く要望されているのが現況である。
【０００３】
そこで、その改良の一環と考えられる従来の文献を説明する。例えば、特開平７−２２２３９９号の減速機付電動機（文献（１）とする）が挙げられる。この文献（１）は、電動機に設けた回転子軸と減速出力軸間に中間軸を介設するとともに、この中間軸に設けたウオームキ゛ヤとウオームホイールを、回転子軸と減速出力軸にそれぞれ設けたウオームホイールとウオームキ゛ヤに噛合する減速機付電動機において、前記中間軸の両端部に設けた玉軸受けを介してこの中間軸をキ゛ヤケースに回転自在に支承し、このキ゛ヤケースの内面と玉軸受けの端面との間にばねを介挿し、この中間軸をその軸方向中央に向かって常時押圧する構成とした。従って、電動機の回転速度を低く設定した際にも起動可能とするとともに、負荷変動による振動や騒音を発生しない減速機付電動機を提供することを意図する。
【０００４】
【発明が解決しようとする課題】
従来の一例を示した図１０の例では、ケーシンク゛内にオイルを充填する構成も採用されているが、車輌用の減速機としては、騒音の問題、構造の簡素化、メンテナンスの簡便化、又は機構の低コスト化等の面において、必ずしも十分とはいえず、その改良が望まれている。
【０００５】
また文献（１）は、中間軸の規制を介してウオームホイールとウオームキ゛ヤに噛合する騒音、又はキ゛ヤケースの内面と中間軸を軸承する玉軸受けの端面との摺接騒音と、及び中間軸の振動とを解消することを意図する。しかし、常時押圧することは、中間軸に負荷を与えるので、ウオームホイールとウオームキ゛ヤの噛合に少なからず悪影響を与える虞があること、また玉軸受け等の耐久性、又は部品の精度誤差で発生する騒音等解消に問題を残すこと、等の課題が考えられる。
【０００６】
【課題を解決するための手段】
請求項１の発明は、歯車の少なくとも一方の肩部側面に設けた第１の係止部と、係止部付きハ゛ネワッシャに設けた第２の係止部との接触による騒音（摺接等の騒音）及び／又は振動を少なくすること、又は車輌内の静寂と、シートのスムース゛な動きを確保すること、また車内の関係者に与える違和感をなくすこと、更に部品の精度誤差で発生する騒音及び／又は振動等の解消に役立てること、等を意図する。
【０００７】
請求項１は、減速機のケーシンク゛内に設けた歯部を備えた入力軸と、この入力軸の歯部に噛合する外側歯部を外周面に備えた歯車と、この歯車の少なくとも一方の肩部側面に設けた波形、スフ゜ライン、凹凸、スリット等の第１の係止部と、当該歯車の少なくとも一方のホ゛ス部に設けた前記第１の係止部に接触する突片、凹凸、スリット等の第２の係止部を設けた係止部付きハ゛ネワッシャと、この歯車及び係止部付きハ゛ネワッシャに貫設し、かつ当該ケーシンク゛外に延設された当該歯車の内側歯部に噛合する歯部を備えた出力軸とで構成した減速機である。
【０００８】
請求項２の発明は、歯車の肩部側面に設けた第１の係止部と、係止部付きハ゛ネワッシャに設けた第２の係止部との接触による騒音（摺接等の騒音）及び／又は振動を少なくすること、又は車輌内の静寂と、シートのスムース゛な動きを確保すること、また車内の関係者に与える違和感をなくすこと、更に部品の精度誤差で発生する騒音及び／又は振動等の解消に役立てること、等を意図する。
【０００９】
請求項２は、減速機のケーシンク゛内に設けた歯部を備えた入力軸と、この入力軸の歯部に噛合する外側歯部を外周面に備えた歯車と、この歯車の一方の肩部側面に設けた波形、スフ゜ライン、凹凸、スリット等の第１の係止部と、当該歯車の一方のホ゛ス部に設けた前記第１の係止部に接触する突片、凹凸、スリット等の第２の係止部を設けた係止部付きハ゛ネワッシャと、この他方のホ゛ス部に設けたワッシャと、この歯車及び係止部付きハ゛ネワッシャ並びにワッシャに貫設し、かつ当該ケーシンク゛外に延設された当該歯車の内側歯部に噛合する歯部を備えた出力軸とで構成した減速機である。
【００１０】
請求項３の発明は、歯車の肩部側面に設けた第１の係止部と、係止部付きハ゛ネワッシャに設けた第２の係止部との接触、及びハ゛ネを介して騒音及び／又は振動を少なくすること、又は車輌内の静寂と、シートのスムース゛な動きを確保すること、また少なくとも車内の関係者に与える違和感をなくすこと、さらに部品の精度誤差で発生する騒音及び／又は振動等の解消に役立てること、等を意図する。
【００１１】
請求項３は、減速機のケーシンク゛内に設けた歯部を備えた入力軸と、この入力軸の歯部に噛合する外側歯部を外周面に備えた歯車と、この歯車の少なくとも一方の肩部側面に設けた波形、スフ゜ライン、凹凸、スリット等の第１の係止部と、当該歯車の一方のホ゛ス部に設けた前記第１の係止部に接触する突片、凹凸、スリット等の第２の係止部を設けた係止部付きハ゛ネワッシャと、この歯車の他方のホ゛ス部に設けたウエーフ゛ハ゛ネワッシャと、この歯車及び係止部付きハ゛ネワッシャ並びにウエーフ゛ハ゛ネワッシャに貫設し、かつ当該ケーシンク゛外に延設された当該歯車の内側歯部に噛合する歯部を備えた出力軸とで構成した減速機である。
【００１２】
請求項４の発明は、歯車の肩部側面に設けた第１の係止部と、係止部付きハ゛ネワッシャに設けた第２の係止部との接触による騒音（摺接等の騒音）及び／又は振動を少なくすること、又は車輌内の静寂と、シートのスムース゛な動きを確保すること、また車内の関係者に与える違和感をなくすこと、更に部品の精度誤差で発生する騒音及び／又は振動等の解消に役立てること、等を意図する。
【００１３】
請求項４は、減速機のケーシンク゛内に設けた歯部を備えた入力軸と、この入力軸の歯部に噛合する外側歯部を外周面に備えた歯車と、この歯車の両肩部側面に設けた波形、スフ゜ライン、凹凸、スリット等の第１の係止部と、当該歯車の両ホ゛ス部に設けた前記第１の係止部に接触する突片、凹凸、スリット等の第２の係止部を設けた係止部付きハ゛ネワッシャと、この歯車及び係止部付きハ゛ネワッシャに貫設し、かつ当該ケーシンク゛外に延設された当該歯車の内側歯部に噛合する歯部を備えた出力軸とで構成した減速機である。
【００１４】
請求項５の発明は、請求項１〜請求項４の目的を達成し、かつより騒音及び振動を少なくすること、又は車輌内の静寂と、シートのスムース゛な動きを確保すること、また少なくとも車内の関係者に与える違和感をなくすこと、等を意図する。
【００１５】
請求項５は、請求項１〜請求項４に記載の係止部付きハ゛ネワッシャの突片は、この本体部より分岐して帯状に形成した本体と、この本体の端部に設けた自由端とで構成した減速機である。
【００１６】
請求項６の発明は、請求項５の発明に準ずる。
【００１７】
請求項６は、請求項１〜請求項４に記載の係止部付きハ゛ネワッシャの外周面に、複数個の回止めを形成する構成とした減速機である。
【００１８】
【発明の実施の形態】
以下、本発明の実施の態様を説明する。
【００１９】
例えば、シートに本発明の減速機を使用した場合を説明すると、駆動源の出力軸は、減速機のケーシンク゛内に設けた歯部を備えた入力軸に連結されている。従って、駆動源の回転は、出力軸から入力軸を介して減速機の歯車に伝達される。この際に、歯車の回転は、この歯車の肩部側面に設けた第１の係止部と、少なくとも一方の係止部付きハ゛ネワッシャに設けた複数の第２の係止部とが接触することで、当該歯車の妄動が規制されるので、入力軸に設けた歯部と、当該歯車に設けた外側歯部とのカ゛タツキ防止が図れる。従って、この囓合する歯部間で発生する騒音と、振動が極めて少なくなり、聴覚で感ずる騒音をなくし得ることと、振動による違和感がない。しかも、この接触は、三点支持（一例であり、支持する点数は限定されない）の構成を採用することから、歯車に対する負荷も殆どなく、在来の伝達構造と遜色ないこと、又は歯車のカ゛タツキを略完全に規制できること、等の特徴を有する。
【００２０】
そして、減速された回転は、歯車の内側歯部と囓合する歯部を備えた出力軸及び／又は連結部材（図示せず）等を介してシートのリフト軸（図示せず）に伝達される。従って、シートのリフト軸を回転する。このリフト軸の回転を介してリンク機構を作動し、車体側レール上を座席側レールが前後動（移動）し、この座席側レールの移動を介してシートが移動する構造となっている。尚、三点支持は、原則として、第１の係止部の異なる箇所（異なる位相、例えば、Ｅ１、Ｅ２、Ｅ３に示す如く）に、第２の係止部が接触し、前述の各特徴が発揮できる（図７（ハ）参照）。そして、図７（ニ）は、荷重方向の一例をＰで示す。
【００２１】
この際に、前記の如く、歯車の妄動が規制されるので、この出力軸の歯部と、歯車の内側歯部との間におけるカ゛タツキ防止が図れる。前述の例と同様に囓合する歯部間で発生する騒音と、振動が極めて少なくなり、聴覚で感ずる騒音をなくし得ることと、振動による違和感がない。また耐久性の向上と、シートの確実かつスムース゛な移動が図れる特徴がある。
【００２２】
尚、請求項３又は請求項４に記載の他方のホ゛ス部に、ウエーフ゛ハ゛ネワッシャ又は係止部付きハ゛ネワッシャを設ける構成では、ウエーフ゛ハ゛ネワッシャ又は係止部付きハ゛ネワッシャとケーシンク゛内面との摺接抵抗を回避して、より一層の騒音及び／又は振動回避とが図れる利点がある。
【００２３】
前記第１の係止部と第２の係止部との接触は、図７に模式的に示した如く、第１の係止部の三箇所に、第２の係止部の三箇所が、三点支持で係止される構成が、前述の如く、騒音及び／又は振動を少なくできること、又は車輌内の静寂と、シートのスムース゛な動きを確保できること、また車内の関係者に与える違和感をなくすこと、歯車に対する負荷も殆どなく、在来の伝達構造と遜色ないこと、等の優れた機能が発揮できるので好ましい。しかし、第１の係止部の適所に、第２の係止部の何れかが衝止する構成でも、略同じような機能が発揮できる。この係止関係と、係止箇所は、採用する部位、騒音等の許容範囲等を考慮して選択する。
【００２４】
また図示しないが、ハ゛ネと係止部付きハ゛ネワッシャの第２の係止部、又はハ゛ネと歯車の第１の係止部、或いはハ゛ネとケーシンク゛本体・蓋体の内側壁面に設けた第２の係止部（図示せず）との各組合せを利用して騒音及び／又は振動の減少を図る簡易型、低コスト型等の構成も可能である。
【００２５】
【実施例】
以下、本発明の一実施例を、図面を参照して具体的に説明する。
【００２６】
１は円筒部と、この円筒部に直交する筒部とで構成されるケーシンク゛で、このケーシンク゛１は、ケーシンク゛本体１００と、このケーシンク゛本体１００を閉塞する蓋体１０１とで構成されており、当該蓋体１０１は止め具（図示せず）を介して着脱自在に設けられる。２は駆動源（図示せず）に連結部材３、又は他の部材（図示せず）を介して連結される入力軸で、この入力軸２は、ケーシンク゛１の筒部に軸承されている。そして、この入力軸２の外周には歯部２００（ウオーム）が設けられている。図中４はフ゛ッシュ、５、５０は軸受けをそれぞれ示す。
【００２７】
６はケーシンク゛１の円筒部に設けられる歯車（ウオームホイール）で、この歯車６のホ゛ス部６００は、ケーシンク゛本体１００及び蓋体１０１の孔１００ａ及び１０１ａに軸承される。この歯車６の少なくとも一方の肩部側面６０１、（６０１）には、音のしない形状で、俯瞰した状態で、例えば、図６（イ）〜（ハ）に一例として示した形状で、波形、スフ゜ライン（図示せず）、凹凸（図示せず）、スリット（図示せず）等の第１の係止部６０１ａ、（６０１ａ）がｎ個設けられている。尚、この第１の係止部６０１ａは、一定の周期でレヒ゜ートする構成では、接触の安定性、定形化、滑り抵抗の安定性等に寄与できる。しかし、この第１の係止部６０１ａが、一定の周期でレヒ゜ートするか否かは、本発明の目的を達成するためには限定されない。また歯車６の内外周面には、内外側歯部６０２（スフ゜ライン）、６０３が設けられており、この内側歯部６０２には、後述する出力軸の歯部（スフ゜ライン）が、また外側歯部６０３には、前記入力軸２の歯部２００がそれぞれ噛合される。また第１の係止部６０１ａには、後述する係止部が接触する。尚、第１の係止部６０１ａの形状、波形の角度等は、滑らかな構造として、回転力の伝達確保、騒音発生の回避を図ること、又は歯部２００・後述する出力軸の歯部と、内外側歯部６０２、６０３のクリアランス、或いは歯車６の肩部側面６０１と内側壁面１００ｂ、１０１ｂとのクリアランス等に対応すること、等にある。
【００２８】
７は図２の（ロ）等に示されている係止部付きハ゛ネワッシャで、この係止部付きハ゛ネワッシャ７の本体部７００には、音のしない形状で、俯瞰した状態で、例えば、突片、凹凸（図示せず）、スリット（図示せず）等の第２の係止部７０１が設けられている。尚、歯車６のホ゛ス部６００の何れか一方に、第２の係止部７０１、（７０１）を設けた係止部付きハ゛ネワッシャ７、（７）を設ける構成では、接触の安定性、定形化、滑り抵抗の安定性等に寄与できる。しかし、この第２の係止部７０１を設けた係止部付きハ゛ネワッシャ７は、何れか一方側に設ける構成でも本発明の目的を達成できるので限定されない。図中７０２は回り止め、７０３は孔を示す。尚、第２の係止部７０１の形状は滑らかな構造、また第２の係止部７０１の接触部角度は緩やかな構造として、回転力の伝達確保、騒音発生の回避を図ること、又は第１の係止部６０１ａの形状、また歯部２００・後述する出力軸の歯部と、内外側歯部６０２、６０３のクリアランス、或いは歯車６の肩部側面６０１と内側壁面１００ｂ、１０１ｂとのクリアランス等に対応すること、等にある。図中７０１−１は第２の係止部７０１折曲げ基端部、７０１−２は第２の係止部７０１の折曲げ頂部、７０１−３は第２の係止部７０１の折曲げ部の自由端部、をそれぞれ示す。
【００２９】
８は出力軸で、この出力軸８に設けた歯部８００は、歯車６の内側歯部６０２と囓合する。そして、この出力軸８は、連結部材（図示せず）等を介してシートのリフト軸（図示せず）に連結されている。
【００３０】
図中９はウエーフ゛ハ゛ネワッシャで、９０は凸部を示す。このウエーフ゛ハ゛ネワッシャ９は、図４の（ハ）、（ニ）に示されている。またウエーフ゛ハ゛ネワッシャ９は、この例では、他方のホ゛ス部６００に設けられており、ケーシンク゛本体１００の内側壁面１００ｂと歯車６との間に設けられる（一例である）。このウエーフ゛ハ゛ネワッシャ９は、歯車６及び／又は係止部付きハ゛ネワッシャ７等の盲動を回避して、前記接触の安定性、定形化、滑り抵抗の安定性等に寄与する。尚、このウエーフ゛ハ゛ネワッシャ９が音のしない形状となっていることは前述の各例と同じである。
【００３１】
図中１０はハ゛ネワッシャ、平板ワッシャ等のワッシャを示す。このワッシャ１０は、図２の（イ）に示されている。またワッシャ１０は、この例では、他方のホ゛ス部６００に設けられており、ケーシンク゛本体１００の内側壁面１００ｂと歯車６との間に設けられる（一例である）。このワッシャ１０は、歯車６及び／又は係止部付きハ゛ネワッシャ７等の盲動を回避して、前記接触の安定性、定形化、滑り抵抗の安定性等に寄与する。そして、このハ゛ネは必要により、一方側又は両側（図示せず）に設ける。
【００３２】
尚、前述した係止部付きハ゛ネワッシャ７、ウエーフ゛ハ゛ネワッシャ９、ワッシャ１０等の組合せは、前述の図２（イ）〜（ハ）の例に限定されず、必要により組合せは決定される、即ち、図９に係止部付きハ゛ネワッシャ７と、ウエーフ゛ハ゛ネワッシャ９、又はワッシャ１０との組合せ関係の一例を示した。そして、各図において、歯車６、係止部付きハ゛ネワッシャ７、ウエーフ゛ハ゛ネワッシャ９、ワッシャ１０等の組合せは、右方向への回転における一例を示した。しかし、この一例に限定されず、例えば、左方向等の如く、他の方向もあり得る。
【００３３】
【発明の効果】
請求項１の発明は、減速機のケーシンク゛内に設けた歯部を備えた入力軸と、入力軸の歯部に噛合する外側歯部を外周面に備えた歯車と、歯車の少なくとも一方の肩部側面に設けた波形等の第１の係止部と、歯車の少なくとも一方のホ゛ス部に設けた第１の係止部に接触する突片等の第２の係止部を設けた係止部付きハ゛ネワッシャと、歯車及び係止部付きハ゛ネワッシャに貫設し、かつケーシンク゛外に延設された歯車の内側歯部に噛合する歯部を備えた出力軸とで構成した減速機である。従って、歯車の肩部側面に設けた第１の係止部と、係止部付きハ゛ネワッシャに設けた第２の係止部との接触による騒音及び／又は振動を少なくできること、又は車輌内の静寂と、シートのスムース゛な動きが確保できること、また車内の関係者に与える違和感をなくし得ること、等の特徴がある。
【００３４】
請求項２の発明は、減速機のケーシンク゛内に設けた歯部を備えた入力軸と、入力軸の歯部に噛合する外側歯部を外周面に備えた歯車と、歯車の一方の肩部側面に設けた波形等の第１の係止部と、歯車の一方のホ゛ス部に設けた第１の係止部に接触する突片等の第２の係止部を設けた係止部付きハ゛ネワッシャと、他方のホ゛ス部に設けたワッシャと、歯車及び係止部付きハ゛ネワッシャ並びにワッシャに貫設し、かつケーシンク゛外に延設された歯車の内側歯部に噛合する歯部を備えた出力軸とで構成した減速機である。従って、歯車の肩部側面に設けた第１の係止部と、係止部付きハ゛ネワッシャに設けた第２の係止部との接触による騒音及び／又は振動を少なくできること、又は車輌内の静寂と、シートのスムース゛な動きが確保できること、また車内の関係者に与える違和感をなく得ること、更に部品の精度誤差で発生する騒音及び／又は振動等の解消に役立て得ること、等の特徴がある。
【００３５】
請求項３の発明は、減速機のケーシンク゛内に設けた歯部を備えた入力軸と、入力軸の歯部に噛合する外側歯部を外周面に備えた歯車と、この歯車の少なくとも一方の肩部側面に設けた波形等の第１の係止部と、歯車の一方のホ゛ス部に設けた第１の係止部に接触する突片等の第２の係止部を設けた係止部付きハ゛ネワッシャと、歯車の他方のホ゛ス部に設けたウエーフ゛ハ゛ネワッシャと、　歯車及び係止部付きハ゛ネワッシャ並びにウエーフ゛ハ゛ネワッシャに貫設し、かつケーシンク゛外に延設された歯車の内側歯部に噛合する歯部を備えた出力軸とで構成した減速機である。従って、歯車の肩部側面に設けた第１の係止部と、係止部付きハ゛ネワッシャに設けた第２の係止部との接触、及びハ゛ネを介して騒音及び／又は振動を少なくできること、又は車輌内の静寂と、シートのスムース゛な動きが確保できること、また少なくとも車内の関係者に与える違和感をなくし得ること、尚、部品の精度誤差で発生する騒音及び／又は振動等の解消に役立て得ること、等の特徴がある。
【００３６】
請求項４の発明は、減速機のケーシンク゛内に設けた歯部を備えた入力軸と、入力軸の歯部に噛合する外側歯部を外周面に備えた歯車と、歯車の両肩部側面に設けた波形等の第１の係止部と、歯車の両ホ゛ス部に設けた前記第１の係止部に接触する突片等の第２の係止部を設けた係止部付きハ゛ネワッシャと、歯車及び係止部付きハ゛ネワッシャに貫設し、かつケーシンク゛外に延設された歯車の内側歯部に噛合する歯部を備えた出力軸とで構成した減速機である。従って、歯車の肩部側面に設けた第１の係止部と、係止部付きハ゛ネワッシャに設けた第２の係止部との接触による騒音及び／又は振動を少なくし得ること、又は車輌内の静寂と、シートのスムース゛な動きが確保できること、また車内の関係者に与える違和感をなくし得ること、更に部品の精度誤差で発生する騒音及び／又は振動等の解消に役立て得ること、等の特徴がある。
【００３７】
請求項５の発明は、請求項１〜請求項４に記載の係止部付きハ゛ネワッシャの突片は、本体部より分岐して帯状に形成した本体と、本体の端部に設けた自由端とで構成した減速機である。従って、請求項１〜請求項４の目的を達成し、かつより騒音及び振動を少なくできること、又は車輌内の静寂と、シートのスムース゛な動きが確保できること、また少なくとも車内の関係者に与える違和感をなくし得ること、等の特徴がある。
【００３８】
請求項６の発明は、請求項１〜請求項４に記載の係止部付きハ゛ネワッシャの外周面に、複数個の回止めを形成する構成とした減速機である。従って、請求項５の発明と同じ特徴がある。
【図面の簡単な説明】
【図１】本発明の一例を示す正面視した断面図
【図２】（イ）〜（ハ）は第１及び第２の係止部の各一例を示す側面視した要部の断面図で、（イ）は請求項２の例を、（ロ）は請求項３の例を、（ハ）は請求項４の例を示した
【図３】本発明に使用する歯車の一例を示す正面図
【図４】（イ）、（ロ）は本発明に使用する係止部付きハ゛ネワッシャの一例をそれぞれ示す正面図、また（ハ）、（ニ）は本発明に使用するウエーフ゛ハ゛ネワッシャの一例をそれぞれ示す正面図
【図５】図４の一例の第２の係止部（突片）を示す俯瞰模式図
【図６】（イ）〜（ハ）は本発明に使用する歯車の第１の係止部の一例をそれぞれ示す拡大俯瞰断面図
【図７】（イ）は図３のＸ−Ｘの拡大要部断面図、（ロ）は図４のＹ−Ｙの拡大断面図、（ハ）は本発明に使用する歯車の第１の係止部と、係止部付きハ゛ネワッシャの第２の係止部との関係の一例を示した拡大断面図、（ニ）は荷重方向を示す拡大模式図
【図８】本発明の減速機における利用の範囲を示した図であり、荷重と図４に示した（イ）〜（ニ）の各種ワッシャとの関係を示しており、（イ）、（ロ）は係止部付きハ゛ネワッシャにより軽荷重への適用を、また（ハ）、（ニ）はウエーフ゛ハ゛ネワッシャにより重荷重への適用を示した図
【図９】荷重によるワッシャと、係止部付きハ゛ネワッシャと、ウエーフ゛ハ゛ネワッシャとの採用例を示した図、図においてワッシャは１０、係止部付きハ゛ネワッシャは７、ウエーフ゛ハ゛ネワッシャは９の各数字で示した。この例では、５通り考えられるが、複合の組合せもできる（図示せず）
【図１０】従来の減速機の一例を示す正面視した一部欠截の断面図
【符号の説明】
１　　　　ケーシンク゛
１００　　　ケーシンク゛本体
１００ａ　　孔
１００ｂ　　内側壁面
１０１　　　蓋体
１０１ａ　　孔
１０１ｂ　　内側壁面
２　　　　入力軸
２００　　　歯部
３　　　　連結部材
４　　　　フ゛ッシュ
５　　　　軸受け
５０　　　軸受け
６　　　　歯車
６００　　　ホ゛ス部
６０１　　　肩部側面
６０１ａ　　第１の係止部
６０２　　　内側歯部
６０３　　　外側歯部
７　　　　係止部付きハ゛ネワッシャ
７００　　　本体部
７０１　　　第２の係止部
７０１−１　　折曲げ基端部
７０１−２　　折曲げ頂部
７０１−３　　折曲げ部の自由端部
７０２　　　回止め
７０３　　　孔
８　　　　出力軸
８００　　　歯部
９　　　　ウエーフ゛ハ゛ネワッシャ
９０　　　凸部
１０　　　ワッシャ
Ｅ１　　　位相
Ｅ２　　　位相
Ｅ３　　　位相
Ｐ　　　　荷重方向[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a small reduction gear mainly used for a vehicle seat.
[0002]
[Prior art]
Conventionally, a structure shown in FIG. 10 has been known for this type of speed reducer. In brief, an input shaft 1001 having a tooth portion 1001a is inserted from the outside into a case sink # 1000 of a speed reducer. A gear 1002 having an outer tooth 1002a on the outer peripheral surface of the input shaft 1001 is engaged with a tooth 1001a of the input shaft 1001. The gear 1002 is supported on the case sink 1000 via washers 1003, 1003 provided on both the hose portions 1002c, 1002c. The gear 1002 is generated by the smooth rotation of the gear 1002, the inner surface of the case 1000, and the gear 1002. Avoid noise. An output shaft 1004 having teeth 1004a that penetrate the gear 1002 and washers 1003, 1003, and that mesh with the inner teeth 1002b (slits) of the gear 1002 extending outside the casing. The rotation from the input shaft 1001 is transmitted to the gear 1002 at a reduced speed via the teeth 1001a provided on the input shaft 1001 and the meshing outer teeth 1002a. The reduced rotation is transmitted to the output shaft 1004 (driven shaft) via the tooth portion 1004a (slit) that meshes with the inner tooth portion 1002b. In the transmission process of the power (rotation), the meshing noise between the tooth portion 1001a and the outer tooth portion 1002a and the meshing noise between the inner tooth portion 1002b and the tooth portion 1004a cause annoyance. The noise is further remarkable when the noise is caused by the sliding noise caused by the washer 1003, 1003, the shoulder side surfaces 1002d, 1002d of the gear 1002, and the inner surfaces 1000a, 1000a of the case sink # 1000. As a means for eliminating this harshness (noise), a configuration in which oil is filled is also employed, but it is not sufficient. To explain one example, when this speed reducer is adopted as a device for moving a vehicle seat, these combined noises become a serious problem. This is because the movement of the seat is usually performed in a state where the vehicle is stopped, so that this noise is easily disturbed, and the noise generated due to the accuracy error of the components constituting the speed reducer is eliminated. Currently, there is a strong demand for improvements, such as leaving problems in Japan.
[0003]
Therefore, conventional documents considered as a part of the improvement will be described. For example, there is an electric motor with a speed reducer disclosed in Japanese Patent Application Laid-Open No. 7-222399 (referred to as document (1)). In this document (1), an intermediate shaft is provided between a rotor shaft and a reduction output shaft provided on an electric motor, and a worm gear and a worm wheel provided on the intermediate shaft are provided on a rotor shaft and a reduction output shaft, respectively. In the electric motor with a speed reducer meshing with the worm wheel and the worm gear, the intermediate shaft is rotatably supported on the car case via ball bearings provided at both ends of the intermediate shaft, and the inner surface of the car case and the end face of the ball bearing are The intermediate shaft is always pressed toward the center in the axial direction. Accordingly, it is intended to provide an electric motor with a reduction gear that can be started even when the rotation speed of the electric motor is set to be low and that does not generate vibration or noise due to load fluctuation.
[0004]
[Problems to be solved by the invention]
In the example of FIG. 10 showing a conventional example, a configuration in which oil is filled in the casing ケー is also adopted. However, as a reduction gear for a vehicle, a problem of noise, simplification of a structure, simplification of maintenance, or The mechanism is not necessarily sufficient in terms of cost reduction and the like, and improvement is desired.
[0005]
The document (1) also discloses a noise that meshes with the worm wheel and the worm gear through the regulation of the intermediate shaft, a sliding noise between the inner surface of the car case and an end surface of the ball bearing that supports the intermediate shaft, and a vibration of the intermediate shaft. Is intended to be eliminated. However, pressing constantly applies a load to the intermediate shaft, which may have a considerable adverse effect on the meshing between the worm wheel and the worm gear. Also, the durability of ball bearings and the like, or noise generated due to precision errors in parts. Problems such as leaving a problem in the solution of the problem can be considered.
[0006]
[Means for Solving the Problems]
According to the first aspect of the present invention, the noise caused by the contact between the first locking portion provided on at least one shoulder side surface of the gear and the second locking portion provided on the hinged washer having the locking portion (such as sliding contact). Noise and / or vibration, or to ensure quietness in the vehicle and smooth movement of the seats, to eliminate uncomfortable feelings given to those involved in the vehicle, and to reduce noise and noise generated by component precision errors. And / or to help eliminate vibrations and the like.
[0007]
Claim 1 is an input shaft having teeth provided in a casing of a speed reducer, a gear having outer teeth on its outer peripheral surface meshing with teeth of the input shaft, and at least one shoulder of the gear. A first locking portion such as a waveform, a spline, an unevenness, a slit, etc. provided on the side surface of the gear; And a toothed portion with a second locking portion provided with a locking portion, and a tooth portion that penetrates the gear and the locking portioned washer and that meshes with an inner tooth portion of the gear that extends outside the casing. And an output shaft provided with:
[0008]
According to the invention of claim 2, the noise (noise such as sliding contact) caused by the contact between the first locking portion provided on the side surface of the shoulder portion of the gear and the second locking portion provided on the hinged washer having the locking portion, and And / or reduce vibration, or ensure quietness in the vehicle and smooth movement of the seat, and eliminate uncomfortable feeling given to those involved in the vehicle, and noise and / or vibration generated due to errors in precision of parts. And so on.
[0009]
A second aspect of the present invention provides an input shaft provided with teeth provided in a casing of a reduction gear, a gear provided on an outer peripheral surface with outer teeth engaged with the teeth of the input shaft, and one shoulder of the gear. A first locking portion such as a waveform, spline, unevenness, or slit provided on the side surface, and a first piece such as a projection, unevenness, or slit that contacts the first locking portion provided on one of the gear portions of the gear. A second washer provided with an engaging portion, a washer provided on the other hose portion, a gear, a washer with an engaging portion, and a washer, and penetrated through the washer and extended out of the casing. And an output shaft having teeth that mesh with the inner teeth of the gear.
[0010]
The invention according to claim 3 is that the first locking portion provided on the side surface of the shoulder portion of the gear and the second locking portion provided on the pane washer with the locking portion, and the noise and / or noise through the panel. To reduce vibration, or to ensure quietness in the vehicle and smooth movement of the seats, to at least eliminate discomfort given to persons involved in the vehicle, and to generate noise and / or vibration caused by accuracy errors in parts. It is intended to help solve the problem.
[0011]
A third aspect of the present invention provides an input shaft provided with a tooth portion provided in a casing of a reduction gear, a gear provided on an outer peripheral surface with an outer tooth portion meshing with the tooth portion of the input shaft, and at least one shoulder of the gear. A first locking portion such as a waveform, a spline, an unevenness, a slit, etc. provided on a side surface of the gear, and a projecting piece, unevenness, a slit, etc. contacting the first locking portion provided on one of the gears of the gear. A wire washer with a locking portion provided with a second locking portion, a wafer washer provided on the other hose portion of the gear, a gear washer and a wire washer with a locking portion, and a wafer washer penetrated through the wafer washer. And an output shaft provided with teeth that mesh with the inner teeth of the gear that extends outside the casing.
[0012]
According to a fourth aspect of the present invention, a noise (noise such as sliding contact) caused by contact between the first locking portion provided on the side surface of the shoulder portion of the gear and the second locking portion provided on the hanger washer with the locking portion is provided. And / or reduce vibration, or ensure quietness in the vehicle and smooth movement of the seat, and eliminate uncomfortable feeling given to those involved in the vehicle, and noise and / or vibration generated due to errors in precision of parts. And so on.
[0013]
The input shaft having teeth provided in the casing of the speed reducer, the gear having outer teeth engaged with the teeth of the input shaft on the outer peripheral surface, and both shoulder side surfaces of the gear A first locking portion such as a waveform, a spline, an unevenness, a slit, and the like, and a second locking portion, such as a projection, unevenness, and a slit, which comes into contact with the first locking portions provided on both the hoses of the gear. An output having a locking washer provided with a locking portion, and a tooth portion that penetrates the gear and the locking portion washer and that meshes with an inner tooth portion of the gear that extends outside the casing. This is a reduction gear composed of a shaft.
[0014]
The invention of claim 5 achieves the objects of claims 1 to 4 and further reduces noise and vibration, or assures quietness in the vehicle and smooth movement of the seat, and at least in the vehicle It is intended to eliminate discomfort given to related persons.
[0015]
According to a fifth aspect of the present invention, the projecting piece of the hanger washer with the locking portion according to the first to fourth aspects has a main body branched from the main body and formed in a band shape, and a free end provided at an end of the main body. This is a reduction gear composed of:
[0016]
The invention of claim 6 is based on the invention of claim 5.
[0017]
According to a sixth aspect of the present invention, there is provided a speed reducer having a configuration in which a plurality of detents are formed on the outer peripheral surface of the hanger washer with the locking portion according to the first to fourth aspects.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
[0019]
For example, the case where the speed reducer of the present invention is used for the seat will be described. The output shaft of the drive source is connected to the input shaft having teeth provided in the casing ゛ of the speed reducer. Therefore, the rotation of the drive source is transmitted from the output shaft to the gear of the speed reducer via the input shaft. At this time, the rotation of the gear is such that the first locking portion provided on the side surface of the shoulder of the gear and the plurality of second locking portions provided on at least one of the vane washers with the locking portion come into contact with each other. Thus, the gear is restricted from being deflected, so that rattling between the teeth provided on the input shaft and the outer teeth provided on the gear can be prevented. Therefore, the noise and vibration generated between the interlocking teeth are extremely reduced, so that the noise perceived by hearing can be eliminated, and there is no uncomfortable feeling due to the vibration. In addition, since this contact employs a three-point support (one example, the number of supported points is not limited), there is almost no load on the gear, which is comparable to the conventional transmission structure, or the gear has a rattle. Can be regulated almost completely.
[0020]
Then, the reduced rotation is transmitted to a seat lift shaft (not shown) via an output shaft and / or a connecting member (not shown) having a tooth portion which meshes with the inner tooth portion of the gear. . Accordingly, the seat lift shaft is rotated. The link mechanism is operated through the rotation of the lift shaft, the seat-side rail moves back and forth (moves) on the vehicle-body-side rail, and the seat moves through the movement of the seat-side rail. In principle, the three-point support is such that the second locking portion contacts different portions of the first locking portion (different phases, for example, as shown in E1, E2, and E3), and each of the above-described features. (See FIG. 7C). FIG. 7D shows an example of the load direction by P.
[0021]
At this time, as described above, the gear is restricted from being deflected, so that rattling between the teeth of the output shaft and the inner teeth of the gear can be prevented. As in the above-described example, the noise generated between the interlocking teeth and the vibration are extremely reduced, so that the noise perceived by hearing can be eliminated, and there is no uncomfortable feeling due to the vibration. Further, there is a feature that the durability can be improved and the seat can be moved reliably and smoothly.
[0022]
In the configuration in which the wafer portion washer or the wire washer with the locking portion is provided in the other hose portion according to claim 3 or 4, the sliding contact resistance between the wafer wire washer or the wire washer with the locking portion and the inner surface of the casing is reduced. There is an advantage that the noise and / or vibration can be further avoided.
[0023]
As shown schematically in FIG. 7, contact between the first locking portion and the second locking portion is performed at three portions of the first locking portion and at three portions of the second locking portion. As described above, the structure that is locked by the three-point support can reduce noise and / or vibration, or ensure quietness in the vehicle and smooth movement of the seat, and provide a sense of incongruity to those involved in the vehicle. It is preferable because excellent functions such as elimination, little load on the gear, and no inferiority to the conventional transmission structure can be exhibited. However, substantially the same function can be exerted even in a configuration in which one of the second locking portions collides with an appropriate portion of the first locking portion. The locking relationship and the locking position are selected in consideration of a part to be adopted, a permissible range of noise and the like, and the like.
[0024]
Although not shown, a second locking portion of the panel washer with a panel and a locking portion, or a first locking portion of a panel and a gear, or a second lock provided on the inner wall surface of the panel and the casing / body lid. A configuration such as a simple type or a low-cost type for reducing noise and / or vibration by using each combination with a stop (not shown) is also possible.
[0025]
【Example】
Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings.
[0026]
Reference numeral 1 denotes a case sink composed of a cylindrical portion and a tube portion orthogonal to the cylindrical portion. The case sink # 1 includes a case sink main body 100 and a lid 101 that closes the case sink main body 100. The lid 101 is provided detachably via a stopper (not shown). Reference numeral 2 denotes an input shaft connected to a drive source (not shown) via a connecting member 3 or another member (not shown). The input shaft 2 is supported by a cylindrical portion of the casing 1. A tooth portion 200 (worm) is provided on the outer periphery of the input shaft 2. In the figure, reference numeral 4 denotes a fish, and reference numerals 5 and 50 denote bearings.
[0027]
Reference numeral 6 denotes a gear (worm wheel) provided on the cylindrical portion of the case sink # 1, and a hose portion 600 of the gear 6 is supported by the holes 100a and 101a of the case sink body 100 and the lid 101. At least one of the shoulder side surfaces 601 and (601) of the gear 6 has a sound-free shape and a bird's-eye view of, for example, the waveform shown in FIGS. There are provided n first locking portions 601a, 601a such as splines (not shown), irregularities (not shown), slits (not shown), and the like. Note that the first locking portion 601a can contribute to stability of contact, stabilization, stability of slip resistance, and the like in a configuration in which the first locking portion 601a is repetitive at a constant cycle. However, whether or not the first locking portion 601a repeats at a constant cycle is not limited to achieve the object of the present invention. Inner and outer teeth 602 (spline) and 603 are provided on the inner and outer peripheral surfaces of the gear 6. The inner tooth 602 has teeth (spline) of an output shaft, which will be described later, and outer teeth. The tooth portions 200 of the input shaft 2 are meshed with 603, respectively. Further, the first locking portion 601a contacts a locking portion described later. In addition, the shape of the first locking portion 601a, the angle of the waveform, and the like are designed to be smooth structures to ensure the transmission of rotational force and to avoid the generation of noise, or the tooth 200 and the tooth of the output shaft to be described later. , The clearance between the inner and outer teeth 602 and 603 or the clearance between the shoulder side surface 601 of the gear 6 and the inner wall surfaces 100b and 101b.
[0028]
Reference numeral 7 denotes a pane washer with a locking portion shown in (b) of FIG. 2 and the like. , A second locking portion 701 such as an uneven portion (not shown), a slit (not shown), and the like. In addition, in the configuration in which the second washer 701 and the vane washer 7 with the locking portion provided with the (701) are provided on one of the hose portions 600 of the gear 6, the stability of the contact and the standardized shape are provided. , And can contribute to stability of slip resistance. However, the penetrating washer 7 with the locking portion provided with the second locking portion 701 is not limited even if it is provided on any one side, since the object of the present invention can be achieved. In the figure, reference numeral 702 denotes a detent and 703 denotes a hole. The shape of the second locking portion 701 is smooth, and the angle of the contact portion of the second locking portion 701 is gradual to ensure transmission of rotational force and avoid noise generation. 1, the shape of the locking portion 601a, the clearance between the tooth portion 200, the tooth portion of the output shaft described later, and the inner and outer tooth portions 602, 603, or the clearance between the shoulder side surface 601 of the gear 6 and the inner wall surfaces 100b, 101b. And so on. In the figure, 701-1 is a bent base end of the second locking portion 701, 701-2 is a bent top of the second locking portion 701, and 701-3 is a bent portion of the second locking portion 701. , Respectively.
[0029]
Reference numeral 8 denotes an output shaft. The teeth 800 provided on the output shaft 8 are engaged with the inner teeth 602 of the gear 6. The output shaft 8 is connected to a seat lift shaft (not shown) via a connecting member (not shown) or the like.
[0030]
In the drawing, reference numeral 9 denotes a wafer washer, and reference numeral 90 denotes a projection. The wafer washer 9 is shown in FIGS. In this example, the wafer washer 9 is provided on the other hose portion 600, and is provided between the inner wall surface 100b of the casing 100 and the gear 6 (an example). This wafer washer 9 avoids blinding of the gear 6 and / or the hooked washer 7 with a locking portion, and contributes to the stability of the contact, the stabilization of the shape, the stability of the slip resistance, and the like. It should be noted that the shape of the wafer washer 9 having no sound is the same as in the above-described respective examples.
[0031]
In the drawing, reference numeral 10 denotes a washer such as a washer or a flat washer. This washer 10 is shown in FIG. Further, in this example, the washer 10 is provided on the other hose portion 600 and is provided between the inner wall surface 100b of the casing 100 and the gear 6 (an example). The washer 10 avoids blind movements of the gear 6 and / or the washer 7 with a locking portion and the like, and contributes to the stability of the contact, the stabilization of the shape, the stability of the sliding resistance, and the like. The panel is provided on one side or both sides (not shown) as necessary.
[0032]
Note that the combination of the above-described hook-and-roller washer 7, the wafer-gap washer 9 and the washer 10 is not limited to the examples shown in FIGS. 2A to 2C, and the combination is determined as necessary. FIG. 9 shows an example of a combination relationship between a lock washer 7 with a locking portion and a wafer lock washer 9 or a washer 10. In each of the drawings, the combination of the gear 6, the hook-and-loop washer 7 with a locking portion, the wafer hook-and-washer 9, the washer 10 and the like show an example in the rightward rotation. However, the present invention is not limited to this example, and there may be other directions such as a left direction.
[0033]
【The invention's effect】
The invention according to claim 1 provides an input shaft having teeth provided in a casing of a speed reducer, a gear having outer teeth on its outer peripheral surface meshing with teeth of the input shaft, and at least one shoulder of the gear. A lock provided with a first locking portion such as a waveform provided on the side surface of the portion and a second locking portion such as a protruding piece which comes into contact with the first locking portion provided on at least one of the gear portions of the gear. The present invention relates to a speed reducer comprising: a part-equipped beam washer; and an output shaft having a tooth portion that penetrates through the gear and the part-equipped part washer and that meshes with an inner tooth portion of a gear that extends outside the casing. Therefore, noise and / or vibration caused by contact between the first locking portion provided on the side surface of the shoulder portion of the gear and the second locking portion provided on the hinged washer with the locking portion can be reduced, or the silence in the vehicle can be reduced. That is, the smooth movement of the seat can be ensured, and the uncomfortable feeling given to the persons involved in the vehicle can be eliminated.
[0034]
According to a second aspect of the present invention, there is provided an input shaft having teeth provided in a casing of a speed reducer, a gear having outer teeth on an outer peripheral surface meshing with the teeth of the input shaft, and one shoulder of the gear. With a first locking portion such as a waveform provided on the side surface, and a locking portion provided with a second locking portion such as a protruding piece which comes into contact with the first locking portion provided on one of the teeth of the gear. A shaft washer, a washer provided on the other hose portion, a gear washer with a gear and a locking portion, and an output shaft provided with a tooth portion penetrating through the washer and meshing with an inner tooth portion of a gear extending outside the casing. And a speed reducer composed of Therefore, noise and / or vibration caused by contact between the first locking portion provided on the side surface of the shoulder portion of the gear and the second locking portion provided on the hinged washer with the locking portion can be reduced, or the silence in the vehicle can be reduced. In addition, the smooth movement of the seat can be ensured, the uncomfortable feeling given to the persons in the vehicle can be eliminated, and the noise and / or vibration generated by the accuracy error of the parts can be helped. .
[0035]
According to a third aspect of the present invention, there is provided an input shaft having teeth provided in a casing of a speed reducer, a gear having an outer tooth surface on an outer peripheral surface meshing with the teeth of the input shaft, and at least one of the gears. A lock provided with a first locking portion such as a waveform provided on the side surface of the shoulder and a second locking portion such as a protruding piece which comes into contact with the first locking portion provided on one of the teeth of the gear. Part washer, a wafer part washer provided on the other hose part of the gear, a gear part and a part washer with a locking part, and meshed with the inner tooth part of the gear penetrating through the wafer part washer and extending outside the casing. And an output shaft provided with a tooth portion. Therefore, noise and / or vibration can be reduced through contact between the first locking portion provided on the side surface of the shoulder portion of the gear and the second locking portion provided on the pane washer with the locking portion, and the panel. Alternatively, it is possible to ensure the silence in the vehicle and the smooth movement of the seat, and to at least eliminate the sense of incongruity given to those involved in the vehicle, and to help eliminate noise and / or vibration generated due to accuracy errors in parts. There are features such as that.
[0036]
The invention according to claim 4 provides an input shaft having teeth provided in a casing of a reduction gear, a gear having outer teeth engaged with teeth of the input shaft on an outer peripheral surface, and both shoulder side surfaces of the gear. And a locking washer provided with a second locking portion, such as a projection, which contacts the first locking portions provided on both the hoses of the gear. And an output shaft provided with a gear and a toothed portion penetrating through a gear washer with a locking portion and meshing with an inner toothed portion of a gear extending outside the casing. Accordingly, noise and / or vibration caused by contact between the first locking portion provided on the side surface of the shoulder portion of the gear and the second locking portion provided on the hinged washer having the locking portion can be reduced. The feature is that the quietness of the seat and the smooth movement of the seat can be ensured, the uncomfortable feeling given to those involved in the vehicle can be eliminated, and the noise and / or vibration generated due to the precision error of the parts can be eliminated. There is.
[0037]
According to a fifth aspect of the present invention, the projecting piece of the hanger washer with the locking portion according to any one of the first to fourth aspects has a main body branched from the main body and formed in a band shape, and a free end provided at an end of the main body. This is a reduction gear composed of: Therefore, the objects of claims 1 to 4 can be achieved and noise and vibration can be further reduced, or silence in the vehicle and smooth movement of the seat can be ensured, and at least a sense of discomfort given to persons involved in the vehicle can be achieved. It can be eliminated.
[0038]
According to a sixth aspect of the present invention, there is provided a speed reducer having a configuration in which a plurality of detents are formed on the outer peripheral surface of the hanger washer with the locking portion according to the first to fourth aspects. Therefore, there is the same feature as the invention of claim 5.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing an example of the present invention as viewed from the front.
FIGS. 2A to 2C are cross-sectional views of essential parts in a side view showing each example of first and second locking portions, and FIG. 2A is an example of claim 2; Shows an example of claim 3, and (c) shows an example of claim 4.
FIG. 3 is a front view showing an example of a gear used in the present invention.
FIGS. 4 (a) and 4 (b) are front views respectively showing an example of a washer with a locking portion used in the present invention, and FIGS. 4 (c) and 4 (d) are examples of a wafer washer used in the present invention. Front view showing each
5 is a schematic overhead view showing a second locking portion (projection piece) of the example of FIG. 4;
FIGS. 6A to 6C are enlarged overhead sectional views each showing an example of a first locking portion of a gear used in the present invention.
FIGS. 7A and 7B are enlarged sectional views taken along line XX of FIG. 3, FIG. 7B is an enlarged sectional view taken along line YY of FIG. 4, and FIG. 7C is a first example of a gear used in the present invention. An enlarged cross-sectional view showing an example of a relationship between a locking portion and a second locking portion of a pen washer with a locking portion, and (d) is an enlarged schematic diagram showing a load direction.
FIG. 8 is a diagram showing a range of use in the speed reducer of the present invention, and shows a relationship between a load and various washers (a) to (d) shown in FIG. 4; (B) shows application to light load by using a washer with a locking part, and (c) and (d) show application to heavy load by using a wafer washer
FIG. 9 is a view showing an example of adoption of a washer by a load, a wire washer with a locking portion, and a wafer washer. In the drawing, a washer is 10, a wire washer with a locking portion is 7, and a wafer washer is 9. Indicated by. In this example, there are five possible combinations, but a combination of combinations is also possible (not shown).
FIG. 10 is a partially cut-away sectional view showing an example of a conventional speed reducer as viewed from the front.
[Explanation of symbols]
1 Case Sync ゛
100 body sink body
100a hole
100b inner wall
101 Lid
101a hole
101b inner wall surface
2 Input shaft
200 teeth
3 Connecting members
4 Fish
5 bearing
50 bearing
6 gears
600 hose section
601 shoulder side
601a First locking portion
602 inner teeth
603 outer teeth
7 Hanewasher with locking part
700 body
701 Second locking part
701-1 Bending base end
701-2 bent top
701-3 Free end of bent part
Stop 702 times
703 holes
8 Output shaft
800 teeth
9 Wafer Power Washer
90 convex
10 washers
E1 phase
E2 phase
E3 phase
P Load direction

Claims

減速機のケーシンク゛内に設けた歯部を備えた入力軸と、この入力軸の歯部に噛合する外側歯部を外周面に備えた歯車と、この歯車の少なくとも一方の肩部側面に設けた波形、スフ゜ライン、凹凸、スリット等の第１の係止部と、当該歯車の少なくとも一方のホ゛ス部に設けた前記第１の係止部に接触する突片、凹凸、スリット等の第２の係止部を設けた係止部付きハ゛ネワッシャと、この歯車及び係止部付きハ゛ネワッシャに貫設し、かつ当該ケーシンク゛外に延設された当該歯車の内側歯部に噛合する歯部を備えた出力軸とで構成した減速機。An input shaft having teeth provided in the casing of the reduction gear, a gear having outer teeth on its outer peripheral surface meshing with the teeth of the input shaft, and at least one shoulder side surface of the gear. A first engaging portion such as a waveform, a spline, an unevenness, a slit, etc., and a second engaging portion such as a projecting piece, unevenness, a slit, etc., contacting the first engaging portion provided on at least one of the gear portions of the gear. An output shaft provided with a locking washer provided with a locking portion, and a tooth portion penetrating through the gear and the locking portion washer and meshing with an inner tooth portion of the gear extending outside the casing. And a speed reducer.

減速機のケーシンク゛内に設けた歯部を備えた入力軸と、この入力軸の歯部に噛合する外側歯部を外周面に備えた歯車と、この歯車の一方の肩部側面に設けた波形、スフ゜ライン、凹凸、スリット等の第１の係止部と、当該歯車の一方のホ゛ス部に設けた前記第１の係止部に接触する突片、凹凸、スリット等の第２の係止部を設けた係止部付きハ゛ネワッシャと、この他方のホ゛ス部に設けたワッシャと、この歯車及び係止部付きハ゛ネワッシャ並びにワッシャに貫設し、かつ当該ケーシンク゛外に延設された当該歯車の内側歯部に噛合する歯部を備えた出力軸とで構成した減速機。An input shaft provided with teeth provided in the casing of the reduction gear, a gear provided on the outer peripheral surface with outer teeth engaged with the teeth of the input shaft, and a waveform provided on one shoulder side surface of the gear , A spline, an uneven portion, a slit, etc., and a second engaging portion, such as a projection, an uneven portion, a slit, etc., which comes into contact with the first engaging portion provided on one of the hoses of the gear. And a washer provided on the other hose portion, and a toothed washer provided with the locking portion, the toothed washer with the locking portion, and an inner tooth of the gear extending through the washer and extending outside the casing. A speed reducer comprising an output shaft having a tooth portion meshing with the portion.

減速機のケーシンク゛内に設けた歯部を備えた入力軸と、この入力軸の歯部に噛合する外側歯部を外周面に備えた歯車と、この歯車の少なくとも一方の肩部側面に設けた波形、スフ゜ライン、凹凸、スリット等の第１の係止部と、当該歯車の一方のホ゛ス部に設けた前記第１の係止部に接触する突片、凹凸、スリット等の第２の係止部を設けた係止部付きハ゛ネワッシャと、　この歯車の他方のホ゛ス部に設けたウエーフ゛ハ゛ネワッシャと、この歯車及び係止部付きハ゛ネワッシャ並びにウエーフ゛ハ゛ネワッシャに貫設し、かつ当該ケーシンク゛外に延設された当該歯車の内側歯部に噛合する歯部を備えた出力軸とで構成した減速機。An input shaft having teeth provided in the casing of the reduction gear, a gear having outer teeth on its outer peripheral surface meshing with the teeth of the input shaft, and at least one shoulder side surface of the gear. A first locking portion such as a waveform, a spline, an unevenness, a slit, and the like, and a second locking portion such as a protruding piece, unevenness, and a slit that comes into contact with the first locking portion provided on one of the gear portions of the gear. A wire washer provided with a locking portion, a wafer washer provided on the other hose portion of the gear, a gear washer and a wire washer with a locking portion, and a wire washer penetrated through the wire washer and extended outside the casing. And an output shaft provided with a tooth portion meshing with the inner tooth portion of the gear.

減速機のケーシンク゛内に設けた歯部を備えた入力軸と、この入力軸の歯部に噛合する外側歯部を外周面に備えた歯車と、この歯車の両肩部側面に設けた波形、スフ゜ライン、凹凸、スリット等の第１の係止部と、当該歯車の両ホ゛ス部に設けた前記第１の係止部に接触する突片、凹凸、スリット等の第２の係止部を設けた係止部付きハ゛ネワッシャと、この歯車及び係止部付きハ゛ネワッシャに貫設し、かつ当該ケーシンク゛外に延設された当該歯車の内側歯部に噛合する歯部を備えた出力軸とで構成した減速機。An input shaft provided with teeth provided in the casing of the speed reducer, a gear provided on the outer peripheral surface with outer teeth engaged with the teeth of the input shaft, and a waveform provided on both shoulder side surfaces of the gear; A first locking portion such as a spline, unevenness, and slit is provided, and a second locking portion such as a protrusion, unevenness, and slit are provided in contact with the first locking portions provided on the two hose portions of the gear. And an output shaft provided with a tooth portion that penetrates through the gear and the wire washer with the locking portion and that meshes with the inner tooth portion of the gear that extends outside the casing. Decelerator.

請求項１〜請求項４に記載の係止部付きハ゛ネワッシャの突片は、この本体部より分岐して帯状に形成した本体と、この本体の端部に設けた自由端とで構成した減速機。The projecting piece of the locking washer according to any one of claims 1 to 4, wherein the projecting piece comprises a main body branched from the main body and formed in a band shape, and a free end provided at an end of the main body. .

請求項１〜請求項４に記載の係止部付きハ゛ネワッシャの外周面に、複数個の回止めを形成する構成とした減速機。A speed reducer having a configuration in which a plurality of detents are formed on an outer peripheral surface of the fastener-equipped pane washer according to claim 1.