JPH03177628A - Power transmission - Google Patents

Power transmission

Info

Publication number
JPH03177628A
JPH03177628A JP31486289A JP31486289A JPH03177628A JP H03177628 A JPH03177628 A JP H03177628A JP 31486289 A JP31486289 A JP 31486289A JP 31486289 A JP31486289 A JP 31486289A JP H03177628 A JPH03177628 A JP H03177628A
Authority
JP
Japan
Prior art keywords
viscous fluid
piston
space
housing
elastic tube
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
JP31486289A
Other languages
Japanese (ja)
Inventor
Hideyuki Saito
秀幸 斉藤
Masaki Inui
正樹 乾
Satoshi Ashida
敏 芦田
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.)
Toyota Motor Corp
Toyoda Koki KK
Original Assignee
Toyota Motor Corp
Toyoda Koki KK
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 Toyota Motor Corp, Toyoda Koki KK filed Critical Toyota Motor Corp
Priority to JP31486289A priority Critical patent/JPH03177628A/en
Publication of JPH03177628A publication Critical patent/JPH03177628A/en
Pending legal-status Critical Current

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  • Hydraulic Clutches, Magnetic Clutches, Fluid Clutches, And Fluid Joints (AREA)

Abstract

PURPOSE:To retrain increase in clutch engaging force at temperature rise by attaching an elastic tube on a portion communicating to a space part into which viscous fluid is sealed and by having it absorb cubical expansion of the viscous fluid. CONSTITUTION:A piston 24, a clutch means 25 and an end cover 28 are attached on the inside of a housing 21, and in a space part 40 in the shape of a cylinder that the piston 24 is formed between both end walls of the end cover 28, a disk-shaped rotation member 41 is enclosed in capable of slidably brought into contact. Viscous fluid is sealed in this space part 40, and a ring-shaped groove 45 is formed on the end wall of the piston 24 or the end wall of the end cover 28 so that it communicates with this fluid, on which a ring-shaped elastic tube 28 made of rubber into which air is sealed is attached. When volume of the viscous fluid filled in the space part 40 is expanded, the elastic tube 46 is elastically contracted so as to absorb the cubical expansion. By this, rapid increase in transmission torque caused by temperature rise of the viscous fluid can be prevented.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、相対回転可能な2軸の間に配置され両軸の間
で駆動力を伝達する駆動力伝達装置に関するものである
DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a driving force transmission device that is disposed between two relatively rotatable shafts and transmits driving force between the two shafts.

〈従来の技術〉 一般に、前、後輪間でトルクを伝達する4輪駆動用のカ
ップリング装置、あるいは左、右輪間でトルクを伝達す
る差動制限用のカップリング装置等においては、トルク
伝達用のクラッチ手段と、このクラッチ手段を作動する
ピストンと、前、後輪あるいは左、右輪の差動回転に応
じた圧力を発生する圧力発生部を備え、この発生圧力を
ピストンに作用してクラッチ手段を摩擦係合させるよう
になっている。
<Prior Art> Generally, in a four-wheel drive coupling device that transmits torque between the front and rear wheels, or a differential limiting coupling device that transmits torque between the left and right wheels, torque It is equipped with a clutch means for transmission, a piston that operates the clutch means, and a pressure generating part that generates pressure according to the differential rotation of the front and rear wheels or the left and right wheels, and this generated pressure is applied to the piston. The clutch means is frictionally engaged.

ところで、駆動力伝達装置の小形、軽量化を主たる目的
にして、前記ピストンの側方に粘性流体を封入した空間
部を設け、この空間部に回転部材を収納し、前記差動回
転によって空間部内で回転部材を相対回転させることに
より接近した2面間で粘性流体を強制移動させて粘性流
体の粘性摩擦作用にまり差動回転に応した圧力を発生さ
せ、この圧力をピストンに作用してクラッチ手段を係合
させるようにした駆動力伝達装置は、特開昭63−24
0429号公報に記載されているように公知である。
By the way, with the main purpose of reducing the size and weight of the driving force transmission device, a space filled with viscous fluid is provided on the side of the piston, a rotating member is housed in this space, and the differential rotation causes the inside of the space to be By rotating the rotating members relative to each other, the viscous fluid is forcibly moved between two close surfaces, and the viscous fluid's viscous friction generates pressure corresponding to the differential rotation, and this pressure is applied to the piston to drive the clutch. A driving force transmission device in which the means are engaged is disclosed in Japanese Patent Application Laid-open No. 63-24.
This method is known as described in Japanese Patent No. 0429.

〈発明が解決しようとする課題〉 この種の駆動力伝達装置においては、空間部に封入した
粘性流体の充填率によって伝達特性が大きく変化し、充
填率を高めることによって差動回転に対する伝達トルク
を向上することができる。
<Problem to be solved by the invention> In this type of driving force transmission device, the transmission characteristics change greatly depending on the filling rate of the viscous fluid sealed in the space, and by increasing the filling rate, the transmission torque for differential rotation can be reduced. can be improved.

しかしながら、充填率を高めると、差動回転に伴う温度
上昇によって粘性流体が体積膨張するため、その体積膨
張によってピストンが押圧され、クラッチの係合力が急
増される問題がある。
However, when the filling rate is increased, the viscous fluid expands in volume due to the temperature rise associated with the differential rotation, and this volumetric expansion presses the piston, causing a problem in which the engagement force of the clutch increases rapidly.

〈課題を解決するための手段〉 本発明は、上記した従来の問題点を解消するためになさ
れたもので、相対回転可能な2軸の一方に連結されるハ
ウジングと、他方に連結され前記ハウジングに回転可能
に軸承された回転軸と、前記ハウジング内に収納され前
記クラッチ手段を押圧するピストンと、このピストンの
側方に設けられ粘性流体を封入した空間部と、この空間
部に収納され前記ハウジングと回転軸との差動回転によ
り前記粘性流体を移動させて差動回転に応じた圧力を発
生させる回転部材とを備え、この圧力を前記ピストンを
介してクラッチ手段に作用させて前記2軸の間で動力を
伝達するようにした駆動力伝達装置において、前記空間
部に通ずる箇所に空間部に封入された粘性流体の体積膨
張により弾性収縮して体積膨張を吸収する弾性チューブ
を装着したものである。
<Means for Solving the Problems> The present invention has been made to solve the above-described conventional problems, and includes a housing connected to one of two relatively rotatable shafts, and a housing connected to the other shaft. a rotating shaft rotatably supported on the housing; a piston housed in the housing for pressing the clutch means; a space provided on the side of the piston and enclosing a viscous fluid; a rotating member that moves the viscous fluid by differential rotation between the housing and the rotating shaft to generate pressure according to the differential rotation, and applies this pressure to the clutch means via the piston to A driving force transmission device configured to transmit power between the spaces, in which an elastic tube is installed at a point communicating with the space that elastically contracts and absorbs the volume expansion due to the volume expansion of the viscous fluid sealed in the space. It is.

く作用〉 上記した構成により、ハウジングと回転軸との間で差動
回転が生ずると、回転部材が空間部内を相対回転され、
空間部に充填された粘性流体の粘性摩擦作用により空間
部に差動回転に応じた圧力が発生する。この圧力により
ピストンが押圧され、クラッチ手段が係合されてハウジ
ングと回転軸との間でトルクが伝達される。この場合、
粘性流体の充填率が高いと、差動回転に対する伝達特性
を向上できるようになる。
Effect> With the above configuration, when differential rotation occurs between the housing and the rotating shaft, the rotating member is relatively rotated within the space,
A pressure corresponding to the differential rotation is generated in the space due to the viscous friction of the viscous fluid filling the space. This pressure pushes the piston, engages the clutch means, and transmits torque between the housing and the rotating shaft. in this case,
If the filling rate of the viscous fluid is high, the transmission characteristics for differential rotation can be improved.

かかる差動回転による温度上昇に伴い、空間部に充填さ
れた粘性流体が体積膨張しても、この体積膨張は弾性チ
ューブの弾性変形により吸収されるので、温度上昇時に
クラッチ係合力が増大するのを抑制できるようになる。
Even if the viscous fluid filling the space expands in volume due to the temperature rise due to such differential rotation, this volumetric expansion is absorbed by the elastic deformation of the elastic tube, so the clutch engagement force does not increase when the temperature rises. can be suppressed.

〈実施例〉 以下本発明の実施例を図面に基づいて説明する。<Example> Embodiments of the present invention will be described below based on the drawings.

第1図において、20は相対回転可能な2軸(前1、後
輪軸あるいは左、右輪軸)の間に配置される駆動力伝達
装置を示し、このカップリング装置20は、ハウジング
21と、このハウジング21内を縦貫して回転可能に軸
承された回転軸22と、これらハウジング21と回転軸
22との差動回転に応じた圧力を発生する圧力発生部2
3と、この圧力発生部23にて発生した圧力が作用され
るピストン24と、このピストン24の押圧力によって
摩擦係合されるクラッチ手段25とによって主に構成さ
れている。
In FIG. 1, reference numeral 20 indicates a driving force transmission device disposed between two relatively rotatable axles (front 1, rear wheel axle, or left and right wheel axles). A rotating shaft 22 that extends vertically through the housing 21 and is rotatably supported, and a pressure generating section 2 that generates pressure according to the differential rotation between the housing 21 and the rotating shaft 22.
3, a piston 24 to which the pressure generated by the pressure generating section 23 is applied, and a clutch means 25 that is frictionally engaged by the pressing force of the piston 24.

前記ハウジング21の一端(左端)は前記2軸の一方に
結合されるようになっており、また前記回転軸22には
前記2軸の他方がスプライン係合されるようになってい
る。ハウジング21には、その一端より有底円筒状の中
空穴26が形成され、この中空穴26の開口端はその開
口端に螺着されたエンドカバー28によって閉塞されて
いる。中空穴26には前記ピストン24がエンドカバー
28との間で空間部40を画成するように摺動可能に収
納され、このピストン24はハウジング21の内周に形
成されたスプラインに係合して回り止めされている。
One end (left end) of the housing 21 is connected to one of the two shafts, and the other of the two shafts is spline-engaged with the rotating shaft 22. A cylindrical hollow hole 26 with a bottom is formed at one end of the housing 21, and the open end of the hollow hole 26 is closed by an end cover 28 screwed onto the open end. The piston 24 is slidably housed in the hollow hole 26 so as to define a space 40 with the end cover 28, and the piston 24 is engaged with a spline formed on the inner periphery of the housing 21. rotation is prevented.

また中空室26内には、前記ハウジング21の底面とピ
ストン24との間に多板クラッチからなるクラッチ手段
25が配設されている。クラッチ手段25はハウジング
21の内周にスプライン係合された複数のアウタプレー
ト37と、回転軸22の外周にスプライン係合された複
数のインナプレート38とからなり、これらアウタプレ
ート37とインナプレート38とが交互に配置されてい
る。
Further, in the hollow chamber 26, a clutch means 25 consisting of a multi-plate clutch is disposed between the bottom surface of the housing 21 and the piston 24. The clutch means 25 includes a plurality of outer plates 37 spline-engaged to the inner periphery of the housing 21 and a plurality of inner plates 38 spline-engaged to the outer periphery of the rotating shaft 22. are arranged alternately.

前記ピストン24の端壁とエンドカバー28の端壁との
間に形威された円筒状の空間部4oには、その幅寸法よ
り僅かに小さな肉厚の円板状の回転部材41が摺接可能
に収納されている。この回転部材41は第2図に示すよ
うに、中心部を前記回転軸22の外周にスプライン係合
され、また半径方向に伸長する2つもしくは3つのブレ
ード41A、41Bを有している。また前記空間部40
には、シリコンオイル等からなる比較的高粘度の粘性流
体が封入されている。
A disk-shaped rotating member 41 having a wall thickness slightly smaller than the width thereof is in sliding contact with the cylindrical space 4o formed between the end wall of the piston 24 and the end wall of the end cover 28. possible storage. As shown in FIG. 2, this rotating member 41 has a center portion splined to the outer periphery of the rotating shaft 22, and has two or three blades 41A, 41B extending in the radial direction. Further, the space portion 40
A relatively high-viscosity viscous fluid made of silicone oil or the like is sealed in the container.

前記空間部40を画定するピストン24の端壁あるいは
エンドカバー28の端壁には、回転軸22の軸心を中心
とする環状の溝45が形威され、この環状溝45に内部
にエアを封入したゴム製のリング状弾性チューブ46が
装着されている。かかる弾性チューブ46は空間部40
内に発生する圧力によっては殆ど圧縮しない弾性力を有
し、しかるに温度上昇による粘性流体の体積膨張により
弾性収縮して体積膨張を吸収し得るように構成されてい
る。この場合、弾性チューブ46を収納する環状溝45
の位置は、空間部40に発生する圧力が半径方向の外方
より内方の方が低くなるため、空間部40のできるだけ
回転中心寄りに形成することが好ましい。
An annular groove 45 centered on the axis of the rotating shaft 22 is formed on the end wall of the piston 24 or the end wall of the end cover 28 that defines the space 40, and air is introduced into the annular groove 45. A ring-shaped elastic tube 46 made of sealed rubber is attached. This elastic tube 46 is the space part 40
It has an elastic force that is hardly compressed depending on the pressure generated inside, and is configured so that it can elastically contract and absorb the volume expansion due to the volume expansion of the viscous fluid due to temperature rise. In this case, an annular groove 45 that accommodates the elastic tube 46
It is preferable to form the position as close to the center of rotation of the space 40 as possible because the pressure generated in the space 40 is lower on the inside in the radial direction than on the outside.

上記した構成において、回転部材41がハウジング21
に対して例えば第2図の矢印方向に相対回転すると、空
間部40に充填された粘性流体が回転部材41によって
回転速度差に応じた流速で強制移動される。しかしてこ
の際、ピストン24およびエンドカバー28の両端壁に
対する粘性流体の粘性摩擦作用により、空間部40に回
転部材41の回転速度差に比例した内圧が発生する。す
なわち、この内圧は、A部で最も高く、B部で最も低い
圧力分布となる。これによりピストン24は差動回転に
応じた圧力により押圧され、クラッチ手段25に作用さ
れる。従って複数のアウタプレート37とインナプレー
ト38がピストン24に作用する圧力に応じた押圧力で
摩擦係合され、ハウジング21と回転軸22との間で回
転トルクが伝達される。この場合、粘性流体の充填率が
高いと、差動回転に対する伝達特性を向上できるように
なる。
In the above configuration, the rotating member 41 is connected to the housing 21.
When relative rotation is made, for example, in the direction of the arrow in FIG. 2, the viscous fluid filled in the space 40 is forcibly moved by the rotating member 41 at a flow rate corresponding to the rotational speed difference. However, at this time, due to the viscous frictional action of the viscous fluid on both end walls of the piston 24 and the end cover 28, an internal pressure proportional to the difference in rotational speed of the rotating member 41 is generated in the space 40. That is, this internal pressure has a pressure distribution that is highest in the A part and lowest in the B part. As a result, the piston 24 is pressed by pressure corresponding to the differential rotation, and is applied to the clutch means 25. Therefore, the plurality of outer plates 37 and inner plates 38 are frictionally engaged with each other with a pressing force corresponding to the pressure acting on the piston 24, and rotational torque is transmitted between the housing 21 and the rotating shaft 22. In this case, if the filling rate of the viscous fluid is high, the transmission characteristics for differential rotation can be improved.

かかる差動回転による温度上昇によって、空間部40に
充填された粘性流体が体積膨張すると、弾性チューブ4
6が弾性収縮して体積膨張を吸収するので、体積膨張に
よってビスYン押圧力が変化することがなく、温度上昇
によって伝達トルクが急激に増大するのを防止できるよ
うになる。
When the viscous fluid filled in the space 40 expands in volume due to the temperature rise caused by the differential rotation, the elastic tube 4
6 elastically contracts to absorb the volumetric expansion, the screw Y-in pressing force does not change due to the volumetric expansion, and it is possible to prevent the transmitted torque from increasing rapidly due to temperature rise.

次に本発明の他の実施例を第3図に基づいて説明する。Next, another embodiment of the present invention will be described based on FIG.

この実施例においては、環状溝50を形威したエンドカ
バー28の端面に、その環状溝50を塞ぐようにプレー
ト51を設け、このプレート51とピストン24との間
で前記回転部材41を収納した空間部40を画定すると
ともに、前記環状溝50に凹設した凹部52に内部にエ
アを封入したポール状の弾性チューブ53を装着したも
のである。しかしてプレート51には空間部40と環状
溝50とを連通ずる連通孔54を形威し、この連通孔5
4をを介して環状溝50にも粘性流体を充填するように
なっている。
In this embodiment, a plate 51 is provided on the end face of the end cover 28 having an annular groove 50 so as to close the annular groove 50, and the rotating member 41 is housed between the plate 51 and the piston 24. A pole-shaped elastic tube 53 with air sealed inside is attached to a recess 52 that defines a space 40 and is recessed in the annular groove 50. Therefore, the plate 51 is formed with a communication hole 54 that communicates the space 40 and the annular groove 50.
The annular groove 50 is also filled with viscous fluid through the annular groove 4.

この実施例においても、温度上昇により粘性流体が体積
膨張した場合に、弾性チューブ53によりその体積膨張
を吸収できるようになる。
Also in this embodiment, when the viscous fluid expands in volume due to a rise in temperature, the elastic tube 53 can absorb the volumetric expansion.

このように弾性チューブは、リング状あるいはボール状
に限定されるものではなく、その装着位置も空間部40
に通ずる箇所であれば目的を達成できるものである。
In this way, the elastic tube is not limited to a ring shape or a ball shape, and its mounting position can also be in the space 40.
The purpose can be achieved if it is connected to the point.

〈発明の効果〉 以上述べたように本発明は、粘性流体の体積膨張を吸収
する弾性チューブを設けた構成であるので、空間部に粘
性流体を高充填率で充填しても、温度上昇による粘性流
体の体積膨張によって伝達トルクが上昇する不具合を解
消でき、従って差動回転に対する伝達トルクの向上を何
の支障もなく実現できる効果がある。
<Effects of the Invention> As described above, the present invention is configured with an elastic tube that absorbs the volumetric expansion of the viscous fluid, so even if the space is filled with the viscous fluid at a high filling rate, it will not be affected by the rise in temperature. The problem that the transmission torque increases due to the volume expansion of the viscous fluid can be solved, and therefore the transmission torque for differential rotation can be improved without any problems.

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

図面は本発明の実施例を示すもので、第1図は駆動力伝
達装置の断面図、第2図は第1図の■■線断面図、第3
図は本発明の他の実施例を示す図である。 21・・・ハウジング、22・・・回転軸、24・・・
ピストン、25・・・クラ・ンチ手段、40・・・空間
部、41・・・回転部材、46.53・・・弾性チュー
ブ。
The drawings show an embodiment of the present invention, and FIG. 1 is a sectional view of the driving force transmission device, FIG. 2 is a sectional view taken along the line ■■ in FIG.
The figure shows another embodiment of the invention. 21... Housing, 22... Rotating shaft, 24...
Piston, 25... Clamping means, 40... Space, 41... Rotating member, 46.53... Elastic tube.

Claims (1)

【特許請求の範囲】[Claims] (1)相対回転可能な2軸の一方に連結されるハウジン
グと、他方に連結され前記ハウジングに回転可能に軸承
された回転軸と、前記ハウジング内に収納され前記クラ
ッチ手段を押圧するピストンと、このピストンの側方に
設けられ粘性流体を封入した空間部と、この空間部に収
納され前記ハウジングと回転軸との差動回転により前記
粘性流体を移動させて差動回転に応じた圧力を発生させ
る回転部材とを備え、この圧力を前記ピストンを介して
クラッチ手段に作用させて前記2軸の間で駆動力を伝達
するようにした駆動力伝達装置において、前記空間部に
通ずる箇所に空間部に封入された粘性流体の体積膨張に
より弾性収縮して体積膨張を吸収する弾性チューブを装
着してなる駆動力伝達装置。
(1) a housing connected to one of two relatively rotatable shafts, a rotating shaft connected to the other and rotatably supported by the housing, and a piston housed in the housing and pressing the clutch means; A space is provided on the side of the piston and contains a viscous fluid, and the viscous fluid is moved by the differential rotation between the housing and the rotating shaft housed in this space, and a pressure corresponding to the differential rotation is generated. In the driving force transmission device, the driving force transmission device is provided with a rotating member that transmits the driving force between the two shafts by applying this pressure to the clutch means via the piston, and a space portion is provided at a location communicating with the space portion. A driving force transmission device equipped with an elastic tube that elastically contracts and absorbs the volumetric expansion due to the volumetric expansion of a viscous fluid sealed in the viscous fluid.
JP31486289A 1989-12-04 1989-12-04 Power transmission Pending JPH03177628A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31486289A JPH03177628A (en) 1989-12-04 1989-12-04 Power transmission

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31486289A JPH03177628A (en) 1989-12-04 1989-12-04 Power transmission

Publications (1)

Publication Number Publication Date
JPH03177628A true JPH03177628A (en) 1991-08-01

Family

ID=18058515

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31486289A Pending JPH03177628A (en) 1989-12-04 1989-12-04 Power transmission

Country Status (1)

Country Link
JP (1) JPH03177628A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5454457A (en) * 1993-02-24 1995-10-03 Toyoda Koki Kabushiki Kaisha Torque coupling device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5454457A (en) * 1993-02-24 1995-10-03 Toyoda Koki Kabushiki Kaisha Torque coupling device

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