JPS59110946A - Gear unit - Google Patents

Gear unit

Info

Publication number
JPS59110946A
JPS59110946A JP21768382A JP21768382A JPS59110946A JP S59110946 A JPS59110946 A JP S59110946A JP 21768382 A JP21768382 A JP 21768382A JP 21768382 A JP21768382 A JP 21768382A JP S59110946 A JPS59110946 A JP S59110946A
Authority
JP
Japan
Prior art keywords
gear
idle
driven gear
gears
drive 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.)
Pending
Application number
JP21768382A
Other languages
Japanese (ja)
Inventor
Tokuzo Kaneda
金田 徳蔵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ricoh Co Ltd
Original Assignee
Ricoh Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP21768382A priority Critical patent/JPS59110946A/en
Publication of JPS59110946A publication Critical patent/JPS59110946A/en
Pending legal-status Critical Current

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  • Gear Transmission (AREA)

Abstract

PURPOSE:To prevent gears from disengaging even if a load is added in a gear unit provided with gears to be engaged with and disengaged from each other by adapting them to be engaged smoothly with each other. CONSTITUTION:A drive gear 1, an idle gear 4 rotatably supported on an arm 6 rotatable round the rotational center of the drive gear 1 to be constantly engaged with the drive gear 1, and a driven gear 2 moveble between engaging and disengaging positions of the idle gear 4. In this gear unit, the rotational direction of the drive gear 1 is set toward the rotational center of the driven gear 2 from the rotational center of the idle gear 4 round the rotational center of the drive gear 1. In a triangle constructed of rotational centers A-C of three gears, the vertical angle at the apex of the rotational center of the idle gear 4 is selected over twice as much as the involute gear pressure angle of gears and under two right angles.

Description

【発明の詳細な説明】 技術分野 本発明は歯車装置に関するものである。[Detailed description of the invention] Technical field The present invention relates to a gear device.

従来技術 歯車装置においては第1図に示すように従動歯車2が駆
動歯車J゛に噛み合うとき、必ずしも従動歯車2の歯先
と駆動歯車1の歯底とが、又は逆に駆動歯車1の歯先と
従動歯車2の歯底とが一致するとは限らない。このため
従動歯車2を支持するユニットを駆動歯車】を支持する
本体に向って移動して従動歯車2を駆動歯車lに噛み合
せる際にユニットと本体とがうまく合致しなかったり、
従動歯車の軸が変形してしまったり、オーバーロードで
駆動歯車1が回転しなくなったりするという不具合を生
ずることがある。
In the prior art gear device, as shown in FIG. 1, when the driven gear 2 meshes with the driving gear J', the tooth tips of the driven gear 2 and the tooth bottoms of the driving gear 1 do not necessarily meet, or conversely, the teeth of the driving gear 1 do not always mesh with each other. The tip and the tooth bottom of the driven gear 2 do not always match. For this reason, when the unit supporting the driven gear 2 is moved toward the main body supporting the driving gear 2 and the driven gear 2 is engaged with the driving gear 1, the unit and the main body may not match well.
This may cause problems such as the shaft of the driven gear being deformed or the driving gear 1 not rotating due to overload.

そこで、従動歯車2と駆動歯車lのうち一方を転位歯車
にして歯先幅を小さくするか、第2図に示すように従動
歯車2を支点3のまゎシに旋回可能に支持し従動歯車2
が5駆動歯車1に噛み合う際に回転力を付勢させうまく
回転して噛み合うようにすることが提案されている。
Therefore, either one of the driven gear 2 and the driving gear 1 is made a shifted gear to reduce the tooth tip width, or the driven gear 2 is rotatably supported around the fulcrum 3 as shown in FIG. 2
It has been proposed to apply a rotational force when the 5 drive gear 1 meshes with the 5 drive gear 1 so that the gear rotates properly and meshes with the gear 1.

しかるに転位歯車においては歯先部が全くなくなるわけ
でないので歯先先端同志が突き合ってう提く噛み合わな
いことが生ずる可能性は避けられず、更に駆動側と従動
側の速比が少し変更されるので必ずしも満足されるもの
ではない。まだ第2図に示すような従動歯車の旋回支持
方法の場合には歯車間に離間しようとする力すなわち従
動歯車2が図の左1則に移動しようとする力が働くため
、回転負荷が大きくなると歯車がはずれてしまうという
欠点がある。
However, in shifted gears, the tooth tips do not disappear completely, so it is unavoidable that the tips of the teeth butt against each other and do not mesh, and furthermore, the speed ratio between the driving side and the driven side may be slightly changed. However, it is not always satisfactory. However, in the case of the rotational support method of the driven gear as shown in Fig. 2, there is a force that tries to separate the gears, that is, a force that tries to move the driven gear 2 in the left-hand direction in the figure, so the rotational load is large. The disadvantage is that the gears will come off.

目的 本発明は互に噛み合い、噛みはずし可能な歯車を有する
歯車装置における上記の従来の問題点を解消し、常に円
滑に噛み合わすことができ、しかも負荷が加わっても歯
車の噛み合いがはずれることのない歯車装置を提供する
ことを目的としている。
Purpose The present invention solves the above-mentioned conventional problems in gear devices having gears that can mesh with and disengage from each other, and can always mesh smoothly and prevent the gears from disengaging even when a load is applied. The aim is to provide a gear device that does not require

構成 上記の目的を達成する本発明の構成を図に示す実施例に
基いて詳細に説明する。
DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention that achieves the above objects will be explained in detail based on the embodiments shown in the drawings.

第3図において、本体に支持される駆動歯車1とユニッ
トに支持される従動歯車2とは本体に支持され駆動歯車
lと常時噛み合っているアイドル歯車4を介して互に噛
み合い伝動さ12る。このときアイドル歯車4は駆動歯
車1の回転中心軸線のまわ′9を旋回可能に支持される
。例えば第4図に示されるように、駆動歯型lの回転中
心軸5に旋回oJ能に支持されたアルムロに軸7により
アイト/L[ii車4は回転自在に支持されている。
In FIG. 3, a drive gear 1 supported by the main body and a driven gear 2 supported by the unit mesh with each other and transmit power 12 via an idle gear 4 supported by the main body and constantly meshing with the drive gear 1. At this time, the idle gear 4 is supported so as to be able to turn around the rotation center axis '9 of the drive gear 1. For example, as shown in FIG. 4, the AIT/L[ii wheel 4 is rotatably supported by a shaft 7 on an armuro which is rotatably supported by the rotation center shaft 5 of the drive tooth l.

アイドル歯車4は従動歯車2が移動してアイドル歯車4
に噛み合う際に、歯が円滑K 1lliiみ合わない相
対位置にあるときは無理な負荷がアイドル歯車4及び従
動歯車2に働かないようにアイドル歯車4が容易に待避
移動できるように回転中心軸5の位置を選択しておくの
がよい。このためには第3図において、従動歯車2とア
イドル歯車4とが噛み合っているときの、駆動歯車1の
回転中心Aとアイドル歯車4の回転中心Bを結ぶ線A、
 Bと、更に従動歯車20回転中心をCとすると線B 
Cとがなす角4ABCがほぼ900前後に選定するのが
ま一〇更に駆動歯車10回転方向(これは従動歯車2の
回転方向と同一となる)が回転中心Aを中心として回転
中心B(アイドル歯車〕から回転中心(、f従動歯車)
の方向へ向かう方向になるように選定すると、従動歯車
2の回転負荷がどれだけ犬であってもアイドル歯車Φが
 従動歯車2から待避して駆動力伝達が遮断耐れるよう
な事を生じないだめの1つの条件とさせることができる
。更に以下に示すような必須条件を述べる。今従動歯車
2を回転させるだめの負荷力fがアイドル歯車4にr「
用すると、アイドル歯車4は駆動歯型】から負荷力fに
対抗する駆動力fを受ける。今歯車がインボリュート歯
車であるとすると、歯車に加えられる力は歯面に垂直に
作用することになるから、噛み合っている歯車間の回転
中心を結ぶlA13又はBGに対し歯車の圧力角αだけ
傾斜した面に対して作用する。伺一般には噛み合い率ε
=】〜2であるため厳密にはピッチ円の交点(ピッチ点
)にのみ力が作用するのではなくピッチ点の前後(近寄
り孤上の方が多いうにも力が作用するが、結果的にはピ
ッチ点に作用する力だけを考慮してもほぼ間違いはない
The idle gear 4 becomes the idle gear 4 when the driven gear 2 moves.
When the teeth are in a relative position where they do not mesh smoothly, the rotation center shaft 5 is set so that the idle gear 4 can be easily retracted so that an unreasonable load is not applied to the idle gear 4 and the driven gear 2. It is best to select the location of For this purpose, in FIG. 3, a line A connecting the rotation center A of the drive gear 1 and the rotation center B of the idle gear 4 when the driven gear 2 and the idle gear 4 are meshed,
If B and the center of rotation of the driven gear 20 are C, then line B
The angle 4ABC formed by gear] to the center of rotation (, f driven gear)
If the direction is selected so that the rotational load on the driven gear 2 is large, the idle gear Φ will not retreat from the driven gear 2 and the driving force transmission will not be cut off. This can be made one of the conditions for failure. Furthermore, the following essential conditions are stated. Now, the load force f to rotate the driven gear 2 is applied to the idle gear 4 r.
When used, the idle gear 4 receives a driving force f opposing the load force f from the driving tooth profile. If the gear is an involute gear, the force applied to the gear will act perpendicularly to the tooth surface, so the gear will be inclined by the pressure angle α with respect to lA13 or BG, which connects the rotation center between the meshing gears. It acts on the surface. In general, the engagement rate ε
=] ~ 2, so strictly speaking, the force does not act only on the intersection of the pitch circles (pitch point), but the force acts on the sea urchins before and after the pitch point (more on the approaching arc, but as a result, is almost correct even if only the force acting on the pitch point is considered.

すなわちアイドル歯車4には駆動歯車1に対するピッチ
点Pにおいて11例えば図の反時削方向に作用する力(
駆動力〕fと従動歯車2に対するピッチ点Qにおいて図
の時計方向に作用する力(負荷力)fとが作用し平衡状
態となっている。ここで点Bに作用する偶力fによりア
ーム6(第4図)に点Aのまわりの回転モーメントがr
「用する。この回転モーメントが図において時計方向の
モーメントであるとアイドル歯車4は常に従動歯車2に
向って押しつけられることになり、従動歯車2に対する
動力伝達が断たれることはない。しかるに回転モーメン
トが反時計方向であるとアイドル歯車4は従動歯車2か
ら離れる習性を与えら几ることになり従動歯車2に対す
る動力伝達が断たれることになる。そこで時計方向の回
転モーメントを得る条件を求める。アイドル歯車4の回
転中心に作用する力による線ABに直交する方向の合力
成分y(ま y = f ainθ、 −fcosθ。
In other words, the idle gear 4 is subjected to a force 11 (for example, a force (
The driving force] f and the force (load force) f acting clockwise in the figure at the pitch point Q on the driven gear 2 act to create an equilibrium state. Here, due to the couple f acting on point B, a rotational moment r around point A is applied to arm 6 (Fig. 4).
If this rotational moment is clockwise in the figure, the idle gear 4 will always be pressed toward the driven gear 2, and the power transmission to the driven gear 2 will not be cut off. If the moment is in the counterclockwise direction, the idle gear 4 will have a tendency to move away from the driven gear 2, and the power transmission to the driven gear 2 will be cut off.Therefore, the conditions for obtaining a clockwise rotation moment are set. Find the resultant force component y in the direction orthogonal to the line AB due to the force acting on the rotation center of the idle gear 4 (y = f ain θ, −f cos θ.

= f −sm I−−a )−f −cm ((−α
)+ IIABO−、))2            
2 =f・部α−f−弼(LABO−α〕 となる。
= f -sm I--a )-f -cm ((-α
)+ IIABO-,))2
2=f・part α−f−弼(LABO−α).

時計方向回転モーメントの場合はy≧Oであるからcm
a≧cos(ムABC−α〕 故にπ≧LA B O≧2α 一般に圧力角は2σが多いからLABOは4σ〜□8o
・ となる。っまりLA B C!を圧力角の2倍と2
直角との間に選定すればアイドル歯車4を支持するアー
ム6には常に時計方向の回転モーメントが作用し、従動
歯車2に対するアイドル歯車4のかみあいが常に保持さ
れることができる。
In the case of clockwise rotational moment, y≧O, so cm
a≧cos(μABC-α) Therefore, π≧LA B O≧2α Generally, the pressure angle is often 2σ, so LABO is 4σ~□8o
・It becomes. Tmamari LA B C! is twice the pressure angle and 2
If the angle is selected between the right angle and the right angle, a clockwise rotational moment will always act on the arm 6 supporting the idle gear 4, and the meshing of the idle gear 4 with the driven gear 2 can be maintained at all times.

LABO=900 に選定すると上記の範囲に入るので
この角度も好ましいことになる。
If LABO=900 is selected, it falls within the above range, so this angle is also preferable.

アイドル歯車4に作用する負荷力fが大きくなるとアー
ムに作用する回転モーメントも犬になりアイドル歯車4
を従動歯車2に向って押しつける力も強くなる。しかる
にストツノ竜−8を設けてアイドル歯車4の従動歯車2
に向う移動を規制し、第4図に示すように所定位置から
は従動歯車2の方に向って移動できないようにすると、
従動歯車2とアイドル歯車4との間のかみおいに2ける
所定のバックラッシュを確保することができ円滑なかみ
あい運動を維持する上において好都合である。
When the load force f acting on the idle gear 4 increases, the rotational moment acting on the arm also increases and the idle gear 4
The force pushing the gear toward the driven gear 2 also becomes stronger. However, by providing a strut-shaped dragon-8, the driven gear 2 of the idle gear 4
By restricting the movement toward the driven gear 2 and preventing movement toward the driven gear 2 from a predetermined position as shown in FIG.
It is possible to ensure a predetermined backlash in the mesh between the driven gear 2 and the idle gear 4, which is advantageous in maintaining smooth meshing motion.

アーム6にはばね9によりアーム6をストッパー8に向
って押圧する力を与え、従動歯車2が噛みあっていない
ときにも常に従動歯車2との噛みあいを生ずることがで
きる位置に保持するのが好都合である。
A force is applied to the arm 6 by a spring 9 to press the arm 6 toward the stopper 8, and the arm 6 is held in a position where it can always mesh with the driven gear 2 even when the driven gear 2 is not meshed. is convenient.

効果 本発明により従動歯車とアイドル歯車の歯相互の位置が
噛み合いに適していないときはアイドル歯車が待避移動
でき、しかもアイドル歯車は駆動歯車により駆動さnて
いるので歯相互の相対位置は刻々変るのですぐに噛み合
い可能な状態になり、その負荷力が噛み合い方向へ作用
するから円滑な噛み合い状態に移行することができる。
Effects According to the present invention, when the positions of the teeth of the driven gear and the idle gear are not suitable for meshing with each other, the idle gear can be retracted, and since the idle gear is driven by the drive gear, the relative positions of the teeth change every moment. Therefore, the meshing state is immediately reached, and since the load force acts in the meshing direction, a smooth transition can be made to the meshing state.

本発明により各部材に無理な力を与えることなく円滑な
噛み合いが確保でき、しかも噛み合い後にもアイドル噛
車は常に従動歯車に向う押圧力を受けるので伝動途中に
歯車の噛合いがはずれることがなくなった。
With the present invention, smooth meshing can be ensured without applying excessive force to each member, and even after meshing, the idle gear always receives a pressing force toward the driven gear, so the gears will not become disengaged during transmission. Ta.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は従来の歯の噛み合いを説明する略図、第2図は
従来の歯車装置の−flJの説明図、第3図は本発明に
係る歯車装置の力の平衡状態を説明する略図、第4図は
本発明に係る歯車装置の一実施例の説明図、第5図は第
4図のflJにおける従動歯車が離脱した状態を示す図
である。 1・・・駆動歯車  2・・・従動歯車4・・・アイド
ル歯車6・・・アーム 9・・・ばね A、B、O・・・歯車の回転中心 手続補正書 昭和58年2月16日 特許庁長官若杉和夫 殿 1 事件の表示 昭和57年 特 許   願第217683号2発1明
゛の名称 歯車装置 3 補正をする者 事件との関係  特  許      出願人文jl’
rズ套狗 氏名(名称)(’674)株式会社リョー4代理人 住 所   東京都港区西新橋2丁目32番4号 梶工
業ビル電話(433) 4564  郵便番号105昭
和  年  月  日 発送日 昭和  年  月  日 6、補正の対象 図  面 7、補正の内容
FIG. 1 is a schematic diagram illustrating the meshing of conventional teeth, FIG. 2 is a diagram illustrating -flJ of the conventional gear device, and FIG. 3 is a schematic diagram illustrating the force balance state of the gear device according to the present invention. FIG. 4 is an explanatory diagram of an embodiment of the gear device according to the present invention, and FIG. 5 is a diagram showing a state in which the driven gear at flJ in FIG. 4 is detached. 1... Drive gear 2... Driven gear 4... Idle gear 6... Arm 9... Spring A, B, O... Gear rotation center procedure amendment document February 16, 1982 Mr. Kazuo Wakasugi, Commissioner of the Patent Office 1 Display of the case 1982 Patent Application No. 217683 2 Invention 1 Name of the invention Gear device 3 Person making the amendment Relationship with the case Patent Applicant Humanities jl'
R's Togu Name (Name) ('674) Ryo 4 Co., Ltd. Agent Address Kaji Kogyo Building, 2-32-4 Nishi-Shinbashi, Minato-ku, Tokyo Telephone (433) 4564 Postal Code 105 Showa Year Month Date Shipping Date Showa Year, month, day 6, drawing subject to correction 7, content of correction

Claims (1)

【特許請求の範囲】[Claims] (1)駆動歯車と、駆動歯車の回転中心のまわりに回動
可能なるアームに回転自在に支持され前記駆動歯車と常
時噛み合うアイドル歯車と、該アイドル歯車との噛み合
い位置と離脱位置との間を移動可能なる従動歯車とを有
する歯車装置において、駆動歯車の回転方向が1駆動歯
車の回転中心のまわりにアイドル歯車の回転中心から従
動歯車の回転中心に向う方向に設定されていることと、
前記三歯車の回転中心を結ぶ三角形にオケるアイドル歯
車の回転中心を頂点とする頂角が歯車のインボリュート
歯車圧力角の2倍以上2直角以下に選定されていること
とを特徴とする歯車装置。
(1) A drive gear, an idle gear that is rotatably supported by an arm that is rotatable around the rotation center of the drive gear and always meshes with the drive gear, and a position where the idle gear is engaged with the idle gear and a disengaged position. In a gear device having a movable driven gear, the rotation direction of the drive gear is set in a direction from the rotation center of the idle gear toward the rotation center of the driven gear around the rotation center of the first drive gear;
A gear device characterized in that the apex angle of the triangle connecting the rotation centers of the three gears with the rotation center of the idle gear as the apex is selected to be at least twice the involute gear pressure angle of the gear and at most 2 right angles. .
JP21768382A 1982-12-14 1982-12-14 Gear unit Pending JPS59110946A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21768382A JPS59110946A (en) 1982-12-14 1982-12-14 Gear unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21768382A JPS59110946A (en) 1982-12-14 1982-12-14 Gear unit

Publications (1)

Publication Number Publication Date
JPS59110946A true JPS59110946A (en) 1984-06-27

Family

ID=16708077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21768382A Pending JPS59110946A (en) 1982-12-14 1982-12-14 Gear unit

Country Status (1)

Country Link
JP (1) JPS59110946A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61194848U (en) * 1985-05-28 1986-12-04
FR2798308A1 (en) * 1999-09-13 2001-03-16 Giordano Roncero Machine tool hole tapping jig includes transmission system with torque limited protecting transmission system when resisting torque is greater than maximum set level
EP1238738A1 (en) * 2001-03-05 2002-09-11 Giordano Roncero Tapping apparatus
US6528944B1 (en) 1998-09-29 2003-03-04 Mitsubishi Denki Kabushiki Kaisha Flat panel display with reduced display dead space
JP2010190260A (en) * 2009-02-16 2010-09-02 Mitsubishi Motors Corp Power transmission mechanism

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4815021U (en) * 1971-06-30 1973-02-20

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4815021U (en) * 1971-06-30 1973-02-20

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61194848U (en) * 1985-05-28 1986-12-04
US6528944B1 (en) 1998-09-29 2003-03-04 Mitsubishi Denki Kabushiki Kaisha Flat panel display with reduced display dead space
FR2798308A1 (en) * 1999-09-13 2001-03-16 Giordano Roncero Machine tool hole tapping jig includes transmission system with torque limited protecting transmission system when resisting torque is greater than maximum set level
EP1238738A1 (en) * 2001-03-05 2002-09-11 Giordano Roncero Tapping apparatus
JP2010190260A (en) * 2009-02-16 2010-09-02 Mitsubishi Motors Corp Power transmission mechanism

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