JPH05187514A - Speed change gear - Google Patents

Abstract

PURPOSE:To provide excellent detachability by constituting a speed change gear of a friction type continuously variable transmission unit (CVT unit) and a transmission gear unit comprising a normal/reverse rotation change-over mechanism set in a transmission case, connected to each other as to be detachable through only simple work of attachment or detachment of cases of the units to or from each other. CONSTITUTION:A CVT unit A is equipped with a friction type continuously variable transmission unit 4 comprising plural taper cones 2 driven to revolve round a main shaft 1 and set around the main shaft 1, and a ring-shaped speed change member 3 which can be shifted along the shaft center, circumscribed on the plural taper cones 2, and an output rotor 5 is set as a cylinder shaft relatively-rotatably fitted on the outer surface of the main shaft 1. A transmission gear unit B comprises a normal/reverse rotation change-over mechanism 14 for deriving either normal or reverse rotation of a cylinder speed change rotor 13 freely, set in a transmission case 15. The speed change rotor 13 can be interlocked and connected to the output rotor 5, and relatively-rotatably fitted on the outer surface of a power transmission shaft 12 which can be interlocked and connected to the main shaft 1. The transmission gear unit B can be detached from the CVT unit A freely by detachably connecting a transmission case 24 of the CVT unit A and a transmission case 15 of the unit B with each other with bolts.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、摩擦式無段変速装置
〔Ｃｏｎｔｉｎｕｏｕｓ ＶａｒｉａｂｌｅＴｒａｎｓ
ｍｉｓｓｉｎ（以下、ＣＶＴと略称する）〕を備えた変
速装置に係り、詳しくは、各種の作業機や農機の変速装
置として利用し易いように構成されたものに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a friction type continuously variable transmission (Continuous Variable Trans).
The present invention relates to a transmission equipped with a miss (hereinafter abbreviated as CVT)], and more particularly, to a transmission configured to be easily used as a transmission for various work machines and agricultural machines.

【０００２】[0002]

【従来の技術】この種の変速装置としては、特開平３−
１７７６４９号公報に示されたバインダーの変速装置の
ように、ミッションケース中に減速機構やＣＶＴや正逆
転切換機構等を内装した一体型のものが知られている。2. Description of the Related Art As a transmission of this type, Japanese Patent Laid-Open No.
There is known an integral type transmission device such as a binder transmission device disclosed in Japanese Patent Publication No. 177649 that has a reduction gear mechanism, a CVT, a forward / reverse switching mechanism and the like in a transmission case.

【０００３】[0003]

【発明が解決しようとする課題】ＣＶＴは比較的コンパ
クトで廉価に無段の変速動力を取出すことができる装置
として、近年、その利用計画が増えつつある。上記のも
のでは変速装置全体としての大きさを比較的コンパクト
にできる利点を備えてはいるが、バインダー用に作られ
ているために小型の乗用型芝刈機等の他の機種にそのま
ま適用させることが困難であり、別途、ＣＶＴ付きのミ
ッションを作成することになる。しかしながら、原動機
の出力が同じ位である場合では伝達トルクの点からＣＶ
Ｔ自体は共通に使用することが可能であるから、機種毎
にＣＶＴを一体にミッションに組み込み設定することが
不合理であって汎用性に劣るように見受けられ、改善の
余地があるように思える。本発明の目的は、ＣＶＴを備
えた変速装置の構造を工夫することによって汎用性を持
たせる点にある。In recent years, the CVT has been increasing its use plan as a device which is relatively compact and can take out continuously variable transmission power at a low cost. Although the above has the advantage that the size of the transmission as a whole can be made relatively compact, it can be applied to other models such as small riding lawnmowers as it is because it is made for binders. Is difficult, and a mission with CVT will be created separately. However, if the output of the prime mover is about the same, CV is
Since T itself can be used in common, it seems that it is unreasonable and inferior in versatility to integrally set the CVT in the mission for each model, and there seems to be room for improvement. . An object of the present invention is to provide versatility by devising the structure of a transmission equipped with a CVT.

【０００４】[0004]

【課題を解決するための手段】上記目的の達成のために
本発明は、動力が入力される主軸の周囲に、該主軸の軸
心を中心として公転駆動される複数の回転体を配置し、
これら回転体に亘って軸心方向にシフト可能な変速部材
を接触して摩擦式無段変速部を設けるとともに、この変
速部の出力を取出す出力回転体を、主軸に相対回転自在
に外嵌する筒軸に構成してある摩擦式無段変速装置部
と、出力回転体に連動連結可能な変速回転体を備え、該
変速回転体の回転を正及び逆転自在に取出す正逆転切換
機構を伝動ケース内に構成してある伝動装置部とを、変
速装置部の変速ケースと伝動ケースとの連結及び取外し
による着脱が自在な状態で連結してあるとともに、前記
両ケースの連結に伴って出力回転体と変速回転体とが連
動され、かつ、前記両ケースの取外しに伴って出力回転
体と変速回転体との連動が解除されるように、これら両
回転体に亘って爪クラッチ部を形成して変速装置を構成
してあることを特徴とするものである。In order to achieve the above object, the present invention provides a plurality of rotating bodies, which are revolvably driven around the shaft center of the main shaft, around the main shaft to which power is input,
A friction type continuously variable transmission portion is provided by contacting a transmission member capable of shifting in the axial direction across these rotating bodies, and an output rotating body for extracting the output of the transmission portion is externally fitted to a main shaft so as to be rotatable relative thereto. A friction type continuously variable transmission unit formed on a cylindrical shaft and a variable speed rotating body that can be interlocked with an output rotary body, and a forward / reverse switching mechanism for taking out the rotation of the variable speed rotor in forward and reverse directions can be transmitted. And a transmission unit configured inside the transmission unit and the transmission case of the transmission unit are connected to each other in a freely attachable / detachable manner by connecting and disconnecting the transmission case, and the output rotating body is associated with the connection of the both cases. And the variable speed rotating body are interlocked with each other, and a pawl clutch portion is formed across both of the rotating bodies so that the interlocking of the output rotary body and the variable speed rotating body is released when the both cases are removed. Characterized by configuring a transmission It is intended to.

【０００５】[0005]

【作用】上記の特徴構成は、変速装置をＣＶＴ部とその
他の部、すなわち伝動装置部とに分割する考えである。
この分割式の変速装置によれば、ＣＶＴ部を単独で取り
扱うことが可能になるから、ＣＶＴを用いる他の機種に
は、伝動装置部を切り離した状態のＣＶＴ部と他の伝動
装置部との組み合わせによる他の機種用の変速装置を構
成して使用することが可能になる。また、この変速装置
では分割させるべく変速ケースと伝動ケースとを着脱さ
せると、それに伴って出力回転体と変速回転体とも着脱
されるから、ケースの着脱操作とは別に軸どうしの着脱
操作を行う必要がないものとなる。The above-mentioned characteristic structure is an idea of dividing the transmission into the CVT portion and the other portion, that is, the transmission portion.
According to this split type transmission, it is possible to handle the CVT unit independently. Therefore, in other models using the CVT, the CVT unit with the transmission unit separated and the other transmission unit can be used. It is possible to configure and use a transmission for other models by combining them. Further, in this transmission, when the transmission case and the transmission case are detached so as to be divided, the output rotor and the transmission rotor are also detached accordingly. Therefore, the detaching operation of the shafts is performed separately from the detaching operation of the case. It becomes unnecessary.

【０００６】[0006]

【発明の効果】従って、相対着脱自在なＣＶＴ部と伝動
装置部とで変速装置を構成する工夫によってＣＶＴ部を
汎用装置として利用できるので、汎用性に優れるととも
に、その着脱操作がケースどうしの連結及び分離操作の
みで行える着脱性にも優れた変速装置を提供するとがで
きた。As described above, since the CVT portion can be used as a general-purpose device by devising the transmission by the relatively removable CVT portion and the transmission portion, the versatility is excellent and the attachment / detachment operation is connected between the cases. In addition, it is possible to provide a transmission that is excellent in detachability and can be operated only by a separating operation.

【０００７】[0007]

【実施例】以下に、本発明の実施例を図面に基づいて説
明する。図１、図２にＣＶＴ部Ａと伝動装置部Ｂとで成
る変速装置が示されている。ＣＶＴ部Ａは、動力が入力
される主軸１の周囲に、該主軸１の軸心Ｐを中心として
公転駆動される複数のテーパコーン２（回転体に相当）
を配置し、これらテーパコーン２に亘って軸心方向にシ
フト可能なリング状の変速部材３を外接して摩擦式無段
変速部４を設けるとともに、この変速部４の出力を取出
す出力回転体５を、主軸１に相対回転自在に外嵌する筒
軸として設けることによって構成されている。尚、６
は、外側支持板６Ａと内側支持板６Ｂと支持ピン６Ｃと
で成るキャリヤ、７は支持回転体、８は押圧板であり、
この押圧板８と出力回転体５とボール９とでテーパコー
ン２に作用する押圧機構１０が構成されるとともに、１
１は押圧機構１０での初期圧設定用のバネである。伝動
装置部Ｂは、主軸１の右端に連動連結可能な伝動軸１２
に、出力回転体５に連動連結可能な筒状の変速回転体１
３を相対回転自在に外嵌し、変速回転体１３の回転を正
転及び逆転自在に取出す正逆転切換機構１４を伝動ケー
ス１５内に備えて構成され、伝動軸１２の右端部は伝動
ケース１５外に延出して動力取出し軸１２Ａとしてあ
る。変速回転体１３には駆動スプロケット１３ａと駆動
ギヤ１３ｂとが一体に備えてあり、変速軸１６に遊外嵌
される受動スプロケット１７、受動ギヤ１８及び変速軸
１６にスプライン外嵌されるシフト回転体１９とチェン
２０とで正逆転切換機構１４が構成されている。そし
て、変速軸１６の動力を減速機構２１を介して取出すよ
うにしてある。尚、２５は、さらに他の装置（洗車ポン
プ等）の駆動用として設けられた臨時ギヤであり、その
部分の伝動ケース１５を部分的に着脱式にしておくと便
利である。Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a speed change device including a CVT part A and a transmission device part B. The CVT section A is composed of a plurality of tapered cones 2 (corresponding to a rotating body) that are revolved around a main shaft 1 to which power is input, around an axis P of the main shaft 1.
And a ring-shaped speed change member 3 capable of shifting in the axial direction over the taper cone 2 is circumscribed to provide a friction-type continuously variable transmission section 4, and an output rotor 5 for extracting the output of the speed change section 4 is provided. Is provided as a cylindrical shaft that is fitted onto the main shaft 1 so as to be rotatable relative to the main shaft 1. Incidentally, 6
Is a carrier composed of an outer support plate 6A, an inner support plate 6B and a support pin 6C, 7 is a support rotary member, 8 is a pressing plate,
The pressing plate 8, the output rotary member 5, and the ball 9 constitute a pressing mechanism 10 that acts on the tapered cone 2, and
Reference numeral 1 is a spring for setting an initial pressure in the pressing mechanism 10. The transmission unit B includes a transmission shaft 12 that can be interlockingly connected to the right end of the main shaft 1.
In addition, a cylindrical variable speed rotating body 1 that can be linked to the output rotating body 5
3, a forward / reverse switching mechanism 14 for externally fitting the rotation of the variable speed rotator 13 to take out the rotation of the variable speed rotator 13 in the forward and reverse directions is provided in the transmission case 15, and the right end portion of the transmission shaft 12 is formed in the transmission case 15. It extends outward and serves as a power take-out shaft 12A. The variable speed rotary body 13 is integrally provided with a drive sprocket 13a and a drive gear 13b, and a passive sprocket 17, which is loosely fitted to the speed change shaft 16, a passive gear 18, and a shift rotary body which is splined to the speed change shaft 16. A forward / reverse switching mechanism 14 is constituted by 19 and the chain 20. Then, the power of the speed change shaft 16 is taken out through the speed reduction mechanism 21. Incidentally, 25 is a temporary gear provided for driving other devices (car wash pump or the like), and it is convenient to partially make the transmission case 15 of that part detachable.

【０００８】主軸１と伝動軸１２とはスプライン式のカ
ップリング２２を介して、かつ、出力回転体５と変速回
転体１３とはそれらの軸端部に形成された爪部分５Ａ，
１３Ａとによる爪クラッチ部２３によって夫々軸方向へ
の移動によって係脱されるようにしてあるとともに、Ｃ
ＶＴ部Ａの変速ケース２４と伝動ケース１５とを出力回
転体５部位において左右に分割可能にボルト連結してあ
る。つまり、この変速装置では、連結ボルト２６を外し
て軸心Ｐ方向に移動させれば変速ケース２４と伝動ケー
ス１５との分離と、出力回転体５と変速回転体１３及び
主軸１と伝動軸１２との分離が一挙に行われ、迅速にＣ
ＶＴ部Ａと伝動装置部Ｂとを分離することができる。一
体化する場合も同様であり、迅速に連結することができ
る。従って、これらを単品で使用したりあるいはＣＶＴ
部Ａを他の伝動装置部と結合して使用するといった使い
方が可能になり、汎用性に富む変速装置として各種の作
業車や農機に用いることができるようになる。The main shaft 1 and the transmission shaft 12 are connected via a spline type coupling 22, and the output rotary body 5 and the variable speed rotary body 13 are claw portions 5A formed at their shaft ends.
13A and claw clutch 23 for engaging and disengaging by axial movement respectively,
The shift case 24 and the transmission case 15 of the VT section A are bolted so as to be divided into right and left portions at the output rotary member 5 portion. That is, in this transmission, if the connecting bolt 26 is removed and moved in the direction of the axis P, the transmission case 24 and the transmission case 15 are separated from each other, the output rotor 5, the transmission rotor 13, the main shaft 1 and the transmission shaft 12 are separated. Separation with C
The VT section A and the transmission section B can be separated. The same applies to the case of integration, which enables quick connection. Therefore, these can be used individually or in CVT
The part A can be used by being combined with another transmission device part, and can be used as a versatile transmission for various work vehicles and agricultural machines.

【０００９】この変速装置は、図３に示すようにエンジ
ンＥのクランク軸２７に直接連動連結するとか、図４に
示すようにベルト機構Ｃを介してクランク軸２７に連動
連結する等して使用される。This transmission is used by being directly linked to the crankshaft 27 of the engine E as shown in FIG. 3, or by being linked to the crankshaft 27 via a belt mechanism C as shown in FIG. To be done.

【００１０】尚、特許請求の範囲の項に図面との対照を
便利にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。It should be noted that reference numerals are added to the claims for convenience of comparison with the drawings, but the present invention is not limited to the structures of the accompanying drawings by the entry.

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

【図１】変速装置の構造を示す断面図FIG. 1 is a sectional view showing the structure of a transmission.

【図２】図１に続く伝動装置部の断面図FIG. 2 is a cross-sectional view of the transmission device section following FIG.

【図３】クランク軸と変速装置の連動連結を示す図FIG. 3 is a diagram showing interlocking connection between a crankshaft and a transmission.

【図４】クランク軸と変速装置のベルト機構を介しての
連動連結を示す図FIG. 4 is a diagram showing interlocking connection between a crankshaft and a belt mechanism of a transmission.

【符号の説明】[Explanation of symbols]

１ 主軸 ２ 回転体 ３ 変速部材 ４ 変速部 ５ 出力回転体 １３ 変速回転体 １４ 正逆転切換機構 １５ 伝動ケース ２３ 爪クラッチ部 ２４ 変速ケース Ａ 摩擦式無段変速装置部 Ｂ 伝動装置部 DESCRIPTION OF SYMBOLS 1 main shaft 2 rotating body 3 speed change member 4 speed changing section 5 output rotating body 13 speed changing rotating body 14 forward / reverse switching mechanism 15 transmission case 23 claw clutch section 24 speed changing case A friction type continuously variable transmission section B transmission apparatus section

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 動力が入力される主軸（１）の周囲に、
該主軸（１）の軸心を中心として公転駆動される複数の
回転体（２）を配置し、これら回転体（２）に亘って軸
心方向にシフト可能な変速部材（３）を接触して摩擦式
無段変速部（４）を設けるとともに、この変速部（４）
の出力を取出す出力回転体（５）を、前記主軸（１）に
相対回転自在に外嵌する筒軸に構成してある摩擦式無段
変速装置部（Ａ）と、 前記出力回転体（５）に連動連結可能な変速回転体（１
３）を備え、該変速回転体（１３）の回転を正及び逆転
自在に取出す正逆転切換機構（１４）を伝動ケース（１
５）内に構成してある伝動装置部（Ｂ）とを、 前記変速装置部（Ａ）の変速ケース（２４）と前記伝動
ケース（１５）との連結及び取外しによる着脱が自在な
状態で連結してあるとともに、前記両ケース（２４），
（１５）の連結に伴って前記出力回転体（５）と前記変
速回転体（１３）とが連動され、かつ、前記両ケース
（２４），（１５）の取外しに伴って前記出力回転体
（５）と前記変速回転体（１３）との連動が解除される
ように、これら両回転体（５），（１３）に亘って爪ク
ラッチ部（２３）を構成してある変速装置。1. Around a main shaft (1) to which power is input,
A plurality of rotating bodies (2) that are driven to revolve around the axis of the main shaft (1) are arranged, and a shift member (3) that is shiftable in the axial direction is brought into contact with the rotating bodies (2). And a friction type continuously variable transmission unit (4)
A friction type continuously variable transmission unit (A) having an output rotary body (5) for taking out the output of the main shaft (1) as a cylindrical shaft fitted to the main shaft (1) so as to be rotatable relative to the main shaft (1), and the output rotary body (5). ) And a variable speed rotating body (1
3) and a forward / reverse switching mechanism (14) for extracting the rotation of the variable speed rotating body (13) in a forward and reverse direction so that the transmission case (1
5) The transmission device section (B) configured inside is connected to the transmission case (24) of the transmission section (A) and the transmission case (15) in a freely attachable / detachable state. In addition to the above, both cases (24),
The output rotator (5) and the variable speed rotator (13) are interlocked with the connection of (15), and the output rotator ((15) is removed with the removal of the cases (24), (15). 5) A transmission in which a pawl clutch portion (23) is formed over both the rotating bodies (5) and (13) so that the interlocking between the rotating body (5) and the rotating body (13) is released.