JP3737338B2 - Limited slip differential gear - Google Patents

Limited slip differential gear Download PDF

Info

Publication number
JP3737338B2
JP3737338B2 JP2000146207A JP2000146207A JP3737338B2 JP 3737338 B2 JP3737338 B2 JP 3737338B2 JP 2000146207 A JP2000146207 A JP 2000146207A JP 2000146207 A JP2000146207 A JP 2000146207A JP 3737338 B2 JP3737338 B2 JP 3737338B2
Authority
JP
Japan
Prior art keywords
case
oil
oil flow
flow passage
pair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2000146207A
Other languages
Japanese (ja)
Other versions
JP2001323989A (en
Inventor
裕二 加勢
Original Assignee
株式会社キャロッセ
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 株式会社キャロッセ filed Critical 株式会社キャロッセ
Priority to JP2000146207A priority Critical patent/JP3737338B2/en
Publication of JP2001323989A publication Critical patent/JP2001323989A/en
Application granted granted Critical
Publication of JP3737338B2 publication Critical patent/JP3737338B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Landscapes

  • Retarders (AREA)
  • General Details Of Gearings (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、リミテッドスリップディファレンシャルギアに係り、ケース内のオイルの流れの改良に関する。
【0002】
【従来の技術】
リミテッドスリップディファレンシャルギア(以下LSDと略す)として、例えば特開昭62-062040 号公報がある。このLSDは、図5、図6に示すように、エンジン側から前進方向の回転駆動力が伝達されると、差動制限の利きが開始されるが、駆動輪側から回転駆動力が伝達された場合には差動制限が利かないタイプのもので、エンジンからの駆動力により回転するディファレンシャルケース1と、駆動輪の車軸10,11の軸方向に移動可能に前記ケース1内に互いに対向して収容された一対のプレッシャーリング2,3と、前記一対のプレッシャーリング2,3に挟持されたピニオンシャフト(十字形状に形成されている)4と、前記シャフト4の先端部に回転自在に取り付けられたピニオンギア5と、前記ピニオンギア5を両側から挟むように配置され、それぞれ前記ピニオンギア5に噛み合って前記車軸に駆動力を伝達する一対のサイドギア6,7と、前記ケース1と前記各サイドギア6,7の間に設けられ、前記プレッシャーリング2,3の前記車軸方向外方への移動により圧着されて両サイドギア6,7の差動を制限する多板摩擦クラッチ8,9とを有していて、前記プレッシャーリング2,3をそれぞれ車軸外方へ移動させて両者の隙間を広げ、前記多板摩擦クラッチ8,9をそれぞれ圧着させるるために、前記ピニオンシャフト4の軸横断面を略D字形状に形成するとともに、前記プレッシャーリング2,3には、前記ピニオンシャフト4の軸部と係合するカム面を形成する切欠き部2a,3aが対称に形成された(両切欠き部が合わさって略三角形の形状に形成される)カム分力機構が設けられている。
【0003】
このカム分力機構により、LSDは前進方向の回転駆動力が伝達されると、前記一対のプレッシャーリング2,3を押し広げて差動制限の利きが開始され、前進走行時にエンジンブレーキを動作させた際に駆動輪側から回転駆動力が伝達された場合には、前記一対のプレッシャーリング2,3が押し広げられず、差動制限が利かないことになる。もちろん、前記カム分力機構のカム面を上記の略三角形の形状ではなく菱形に形成すれば、前進・後進時にも差動制限が働くことになる。
【0004】
なお、ケース1にリングギア12が固定され、このリングギア12にエンジンの回転が伝達されるピニオンギア13が噛み合っている。
【0005】
ケース1は、一端側が開放の筒状の容器と、この容器の開放端を塞ぐ蓋部1cで構成され、胴部1 aの内周壁面には、機械加工により車軸方向に沿って形成された凹溝部1eが周方向に複数設けられている。プレッシャーリング2,3の外周には、前記凹溝部1eに対して車軸方向にスライド可能に嵌合する突起部が径方向外方向に突出して設けられ、また、前記多板摩擦クラッチ8,9の外クラッチプレートOCP の外周にも前記凹溝部1eに対して車軸方向にスライド可能に嵌合する突起部が径方向外方向に突出して設けられている。なお、前記多板摩擦クラッチ8,9は、ケース1の上記した凹溝部1eに嵌合して一体的に回転する複数の外クラッチプレートOCP の間に内クラッチプレートICP を配置した構成で、内クラッチプレートICP はサイドギア6,7の軸部に回転不能で且つ車軸方向スライド可能に装着され、プレッシャーリング2,3が車軸方向外方に移動することにより、外クラッチプレートOCP の間に内クラッチプレートICP が挟持され、ケース1の回転が多板摩擦クラッチ8,9を介してサイドギア6,7に伝達されることになる。
【0006】
このようなLSDにおいて、ケース1は潤滑油が入ったディファレンシャルキャリア(不図示)内に収納されており、前記ディファレンシャルキャリア内の潤滑油はケース1の蓋部(以下一端壁部と称す)1cおよび、該一端壁部1cとは反対の他端壁部1bにそれぞれ形成されている加工用孔部1f(本発明の実施の形態を示す図1参照)と、胴部1a に形成されている孔部1dを通して流通できるようになっている。
【0007】
なお、一端壁部1cと他端壁部1bに形成されている加工用孔部1fは、ケース1の内周壁部に凹溝部1eを形成するために設けられたもので、機械加工用の工具を挿通するための円形孔部につながった該工具により形成された凹溝部1eとで構成されている。
【0008】
【発明が解決しようとする課題】
しかしながら、ケース1の一端壁部1cと他端壁部1bの内面と多板摩擦クラッチ8,9の最外端に位置する外クラッチプレートOCP とは殆ど隙間がなく、しかも外クラッチプレートOCP の外周端とケース1の内周面との間にも殆ど隙間が存在しない。
一方、外クラッチプレートOCP の内周端とサイドギア6,7の軸部との間には隙間があるが、隣り合う内クラッチプレートICP の内周端とサイドギア6,7の軸部との間には殆ど隙間がなく、しかも車両の走行中には差動制限が動作して、外クラッチプレートOCP と内クラッチプレートICP とは密着状態にあるため、ここで堰き止められ、潤滑油が多板摩擦クラッチ8,9の各外クラッチプレートOCP と内クラッチプレートICP を通り、サイドギア6,7、ピニオンギア5、プレッシャーリング2,3、前記カム分力機構等を経て充分な循環が得られにくいという問題があった。
【0009】
本出願に係る発明の目的は、LSD ケース内外の潤滑油の良好な循環を容易に得ることができるリミテッドスリップディファレンシャルギアを提供しようとするものである。
【0010】
【課題を解決するための手段】
本発明の目的を実現するリミテッドスリップディファレンシャルギアは、エンジンからの駆動力により回転するディファレンシャルケースと、前記ケースと一体的に回転すると共に駆動輪の車軸方向に移動可能に前記ケース内に互いに対向して収容された左右一対のプレッシャーリングと、前記左右一対のプレッシャーリングに挟持されたピニオンシャフトに回転自在に取り付けられたピニオンギアと、前記ピニオンギアを両側から挟むように配置され、それぞれ前記ピニオンギアに噛合して前記駆動輪の車軸に駆動力を伝達する左右一対のサイドギアと、前記ケースの側壁面と前記左右一対の各サイドギアの間にそれぞれ設けられ、前記プレッシャーリングの車軸方向外方への移動により圧着されて前記両サイドギアの差動を制限する左右一対の多板摩擦クラッチと、前記左右一対のプレッシャーリングおよび前記ピニオンシャフトに形成され、前記一対のプレッシャーリングを互いに離れる前記車軸方向外方に移動させるカム分力機構と、を有し、前記左右の各多板摩擦クラッチは、前記ディファレンシャルケースおよび前記左右の各プレッシャーリングと一体に回転する複数の外クラッチプレートと、前記左右の各サイドギアと一体に回転する複数の内クラッチプレートとを交互に配置した構成とし、前記ケースを構成する胴部の長さ方向の略中央にオイル流通用の流通孔を形成したリミテッドスリップディファレンシャルギアにおいて、前記ディファレンシャルケースの左右両端部の側壁に、前記駆動輪の車軸を中心とする同一円周上に間隔を有してそれぞれ形成された複数の第1のオイル孔と、前記各多板摩擦クラッチを構成する外クラッチプレートと内クラッチプレートの外周部に周方向に沿って間隔を有してそれぞれ形成され、軸方向に見て前記第1のオイル孔の一部と重なり合う位置に径方向外方に向かって開口した第1のオイル流通路用溝部と、前記各プレッシャーリングの外周部に周方向に沿って間隔を有してそれぞれ形成され、軸方向に見て前記第1のオイル孔の一部と重なり合う位置に径方向外方に向かって開口した第2のオイル流通路用溝部と、前記プレッシャーリングの第2のオイル流通路用溝部に対向して前記ディファレンシャルケースの軸方向に沿った内周面に軸方向に沿って形成した第3のオイル流通路用溝部と、を有し、前記第2のオイル流通路用溝部と、前記第3のオイル流通路用溝部および前記外クラッチプレートに形成された第1のオイル流通路用溝部により軸方向に沿った第2のオイル孔を形成し、前記左右の各サイドギアの回転で前記内クラッチプレートにより前記第2のオイル孔が半開と全開の状態に繰り返されることを特徴とするものである。
【0011】
【発明の実施の形態】
(第1の実施の形態)
図1〜図4は本発明の第1の実施の形態を示す。
【0012】
本実施の形態は、図5および図6に示す従来例のLSDにおいて、ケース1の一端壁部1cと他端壁部1bとの間に、加工用孔部1fの間で、プレッシャーリング2,3、多板摩擦クラッチ8,9およびケース1の胴部1aの内周面にかかるように第1のオイル孔である円形のオイル孔20を形成したものである。
【0013】
図1は本実施の形態のLSDの外観を示し(ディファレンシャルキャリアは不図示)、図2(a)はケース1の胴部1 aの内周に形成された凹溝部1eに係合する、プレッシャーリング2,3の係合突起Aと、多板摩擦クラッチ8,9の外クラッチプレートOCPの係合突起Aとの関係、およびプレッシャーリング2,3の外周,多板摩擦クラッチ8,9の内・外クラッチプレートの外周とケース1の内周面との隙間の状態を示している。
【0014】
図1に示すように、ケース1の一端壁部1cと他端壁部1bとの間には、同心円上に複数(本実施の形態では6 個)のオイル孔20が周方向に同位相で等ピッチに形成されており、このオイル孔20は、中心を上記したケース1の胴部1aの内周と、プレッシャーリング2,3および多板摩擦クラッチ8,9の外周との間に形成される前記隙間の間に位置し、ケース1の胴部1aの内周とプレッシャーリング2,3および多板摩擦クラッチ8,9の外周にそれぞれ第2、3のオイル流通路用溝部である略半円形状のオイル流通路用溝部が形成されている。図3に示すように、ケース1の胴部1aの内周面には第3のオイル流通路用溝部である略半円形状のオイル流通路用溝部Eが凹溝部1eの間に等ピッチで形成されている。
【0015】
図2(b)はプレッシャーリング2,3を示し、係合突起Aの間に第3のオイル流通路用溝部である略半円形状のオイル流通路用溝部Bが上記オイル流通路用溝部Eのピッチと等ピッチで形成されている。図2(c)は多板摩擦クラッチ8,9を構成する外クラッチプレートOCPを示し、係合突起Aの間に略半円形状の第1のオイル流通路用溝部であるオイル流通路用溝部Cが等ピッチで形成されている。プレッシャーリング2,3と外クラッチプレートOCPとはそれぞれ係合突起Aがケース1の凹溝1eに係合してケース1と一体に回転するので、図3に示すように、オイル流通路用溝部Bとオイル流通路用溝部Cとはケース1の一端壁部1cと他端壁部1bとの間に形成されたオイル孔20と共に同位相位置に存在する。
【0016】
図2(d)は多板摩擦クラッチ8,9を構成する内クラッチプレートICPを示し、第1のオイル流通路用溝部である略半円形状のオイル流通路用溝部Dが前記オイル流通路用溝部Cと同じピッチで等ピッチに形成されている。
【0017】
この内クラッチプレートICPはサイドギア6,7と一体に回転するので、図4(a)の右側および図4(c)の状態のように、内クラッチプレートICPのオイル流通路用溝部Dと外クラッチプレートOCPのオイル流通路用溝部Cとが同位相となる場合と、図4(a)の左側および図4(b)の状態のように、内クラッチプレートICPのオイル流通路用溝部Dと外クラッチプレートOCPのオイル流通路用溝部Cとが同位相とならない場合があるが、同位相になると、略円形の第2のオイル孔がケース1の両端の壁部からプレッシャーリング2,3の内側まで連通し、ケース1の胴部1aの軸方向の略中央位置に設けられた抜き孔1dを通ってオイルの循環が保証される。
【0018】
すなわち、車両の走行に伴って左右輪に回転差が発生すると、外クラッチプレートと内クラッチプレートにも回転差が発生し、図4に示すような状態を繰り返し、図4(b)の状態での回転差のときは、クラッチプレート間にオイルが流入し易くなり、図4(c)の状態となった時、部分部分で断続的となっていたオイル通路が軸方向で全通するため、ケース1の内周に形成されたオイル流通路用溝部1Eと併せてケース1の中心部までオイルが流れ、ケース1の中心部に設けた孔部1dを通してケース外に流れ、ケース内外のオイルの循環が行なわれることになる。その結果、プレッシャーリングと内クラッチプレートの摩擦面の潤滑、クラッチプレート間の潤滑、サイドギアとピニオンギアのギア噛み合い部の潤滑、クロスシャフトのピニオンギア回転支持部の潤滑などが良好となり、耐摩擦性、内部の各種部材の冷却性が向上し、LSDの安定性の向上が図れる。
【0019】
また、ケース1の内周に形成されたオイル流通路用溝部1Eは、ケース1の両端のオイル孔20と常時連通状態にあり、ケース1の内外を循環するオイルの流量は図4(c)に示す全開状態の場合に比べて少なくなるが、ある程度の流量での循環が行なわれる。
【0020】
【発明の効果】
本発明によれば、ケースを構成する胴部の長さ方向の略中央にオイル流通用の流通孔を形成し、前記ケースの両端部からそれぞれ両側の多板クラッチとプレッシャーリングの外周部に複数のオイル流通路用溝部を周方向に沿って重なり合うように形成すると共に、前記プレッシャーリングのオイル流通路用溝部に対向して前記ケースの軸方向に沿った内周面にオイル流通路用溝部を軸方向に沿って形成したので、前記ケースの両端から前記プレッシャーの内側を通してオイルの循環を確保することができ、LSDを構成する各種の部材の潤滑と冷却等を充分に行なうことができる。
【図面の簡単な説明】
【図1】本発明の第1 の実施の形態を示すリミテッドスリップディファレンシャルギアの外観図で、(a)は正面図、(b)は左側面図、(c)は右側面図。
【図2】図1のケース内部構成を示し、(a)はプレッシャーリング・外クラッチプレートとケースの内周との関係を示す一部断面図、(b)はプレッシャーリングの一部斜視図、(c)は外クラッチプレートの一部斜視図、(d)は内クラッチプレートの一部斜視図。
【図3】図1のケースの内部構成を示し、オイル流通路が全通した状態を示す一部断面図。
【図4】(a)は図1のケース内部での内クラッチプレートの溝部とプレッシャーリングの溝部との位置関係を示し、(b)は両方の溝部が不一致の状態を示す斜視図、(c)は両方の溝部が一致した状態を示す斜視図。
【図5】従来のリミテッドスリップディファレンシャルギアの断面図。
【図6】図5のリミテッドスリップディファレンシャルギアにサイドギアを記載した断面図。
【符号の説明】
1 ディファレンシャルケース
1 a 胴部、1b 他端部、1c 一端部、1d 孔部、1 e 凹溝部
1f 加工用孔、1d 孔部
2,3 プレッシャーリング
4 ピニオンシャフト
5 ピニオンギア
6,7 サイドギア
8,9 多板摩擦クラッチ
10,11 車軸
12 リングギア
13 ピニオンギア
20 オイル孔
A 突起部
B〜D オイル流通路用溝部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a limited slip differential gear, and relates to an improvement in oil flow in a case.
[0002]
[Prior art]
An example of a limited slip differential gear (hereinafter abbreviated as LSD) is disclosed in Japanese Patent Application Laid-Open No. 62-062040. As shown in FIG. 5 and FIG. 6, when the rotational driving force in the forward direction is transmitted from the engine side, the LSD starts to work with differential restriction, but the rotational driving force is transmitted from the driving wheel side. In this case, the differential case 1 is of a type that does not have a differential restriction, and is opposed to each other in the case 1 so as to be movable in the axial direction of the axles 10 and 11 of the drive wheels and the differential case 1 that is rotated by the driving force from the engine. And a pair of pressure rings 2 and 3, a pinion shaft (formed in a cross shape) 4 sandwiched between the pair of pressure rings 2 and 3, and a shaft 4 that is rotatably attached to the tip of the shaft 4 The pinion gear 5 and the pair of side gears 6 which are arranged so as to sandwich the pinion gear 5 from both sides and which respectively mesh with the pinion gear 5 and transmit driving force to the axle. 7 and between the case 1 and each of the side gears 6 and 7, and is pressure-bonded by the outward movement of the pressure rings 2 and 3 in the axle direction to limit the differential between the side gears 6 and 7. In order to have the plate friction clutches 8 and 9 and move the pressure rings 2 and 3 to the outside of the axles respectively to widen the gap between them, and to press the multi-plate friction clutches 8 and 9 respectively. The pinion shaft 4 has a substantially D-shaped cross section, and the pressure rings 2 and 3 have notches 2a and 3a that form cam surfaces that engage with the shaft of the pinion shaft 4. There is provided a cam component mechanism that is formed symmetrically (both notches are combined to form a substantially triangular shape).
[0003]
With this cam component force mechanism, when the rotational driving force in the forward direction is transmitted to the LSD, the pair of pressure rings 2 and 3 are pushed out to start differential limiting, and the engine brake is operated during forward traveling. When a rotational driving force is transmitted from the driving wheel side at this time, the pair of pressure rings 2 and 3 are not spread and the differential limitation is not effective. Of course, if the cam surface of the cam component force mechanism is formed in a diamond shape instead of the above-mentioned triangular shape, differential limitation is also exerted during forward / reverse travel.
[0004]
A ring gear 12 is fixed to the case 1, and a pinion gear 13 that transmits engine rotation is engaged with the ring gear 12.
[0005]
The case 1 is composed of a cylindrical container whose one end is open and a lid 1c that closes the open end of the container. The case 1 is formed on the inner peripheral wall surface of the body 1a along the axle direction by machining. A plurality of concave groove portions 1e are provided in the circumferential direction. On the outer periphery of the pressure rings 2 and 3, there are provided projecting portions that are slidably fitted in the axial direction with respect to the concave groove portion 1e so as to protrude radially outward, and the multi-plate friction clutches 8 and 9 Protrusions that slidably fit in the axial direction with respect to the groove 1e are also provided on the outer periphery of the outer clutch plate OCP so as to protrude radially outward. The multi-plate friction clutches 8 and 9 have a configuration in which an inner clutch plate ICP is arranged between a plurality of outer clutch plates OCP that are fitted into the groove 1e of the case 1 and rotate integrally. The clutch plate ICP is mounted on the shafts of the side gears 6 and 7 so as not to rotate and is slidable in the axial direction, and when the pressure rings 2 and 3 are moved outward in the axial direction, the inner clutch plate is interposed between the outer clutch plates OCP. The ICP is sandwiched and the rotation of the case 1 is transmitted to the side gears 6 and 7 via the multi-plate friction clutches 8 and 9.
[0006]
In such an LSD, the case 1 is housed in a differential carrier (not shown) containing lubricating oil, and the lubricating oil in the differential carrier is covered with a lid portion (hereinafter referred to as one end wall portion) 1c of the case 1 and The processing hole 1f (see FIG. 1 showing the embodiment of the present invention) formed in the other end wall 1b opposite to the one end wall 1c, and the hole formed in the body 1a It can distribute | circulate through the part 1d.
[0007]
The machining hole 1f formed in the one end wall portion 1c and the other end wall portion 1b is provided to form the concave groove portion 1e in the inner peripheral wall portion of the case 1, and is a machining tool. And a concave groove portion 1e formed by the tool connected to a circular hole portion for inserting a through hole.
[0008]
[Problems to be solved by the invention]
However, there is almost no gap between the inner surface of the one end wall portion 1c and the other end wall portion 1b of the case 1 and the outer clutch plate OCP located at the outermost end of the multi-plate friction clutches 8 and 9, and the outer periphery of the outer clutch plate OCP. There is almost no gap between the end and the inner peripheral surface of the case 1.
On the other hand, there is a gap between the inner peripheral end of the outer clutch plate OCP and the shaft portion of the side gears 6 and 7, but between the inner peripheral end of the adjacent inner clutch plate ICP and the shaft portion of the side gears 6 and 7. There is almost no gap, and the differential limit operates while the vehicle is running, and the outer clutch plate OCP and the inner clutch plate ICP are in close contact with each other. The problem is that it is difficult to obtain sufficient circulation through the outer clutch plates OCP and the inner clutch plates ICP of the clutches 8 and 9 and through the side gears 6 and 7, the pinion gear 5, the pressure rings 2 and 3, the cam force distribution mechanism, etc. was there.
[0009]
An object of the invention according to the present application is to provide a limited slip differential gear which can easily obtain a good circulation of the lubricating oil inside and outside the LSD case.
[0010]
[Means for Solving the Problems]
A limited slip differential gear that achieves the object of the present invention includes a differential case that is rotated by a driving force from an engine, and a case that rotates integrally with the case and that is movable in an axle direction of a drive wheel. And a pair of left and right pressure rings, a pinion gear rotatably mounted on a pinion shaft sandwiched between the pair of left and right pressure rings, and the pinion gear arranged from both sides. a pair of left and right side gears for transmitting the driving force to the axle of the drive wheel in mesh, respectively provided between the side wall surface and the right and left pair of the side gears of the case, said towards the axle direction outside the respective pressure ring left the crimping by the movement limiting the differential of the two side gears by Has a pair of multi-plate friction clutch, it is formed on the pair of left and right pressure rings and the pinion shaft, and the cam component force mechanism for moving the axle outwardly away from each other said pair of pressure rings, and the right and left Each of the multi-plate friction clutches alternately includes a plurality of outer clutch plates that rotate integrally with the differential case and the left and right pressure rings, and a plurality of inner clutch plates that rotate integrally with the left and right side gears. In the limited slip differential gear in which a circulation hole for oil circulation is formed at the approximate center in the length direction of the body portion constituting the case, the side walls of the left and right ends of the differential case are provided with side walls of the driving wheel. Formed on the same circumference centered on the axle with a gap A plurality of first oil holes, outer clutch plates constituting each of the multi-plate friction clutches, and outer peripheries of the inner clutch plates are formed at intervals along the circumferential direction. A first oil flow passage groove opening radially outward at a position overlapping with a portion of one oil hole, and an outer peripheral portion of each pressure ring having a distance along the circumferential direction. A second oil flow passage groove opening radially outward at a position overlapping with a part of the first oil hole when viewed in the axial direction, and a second oil flow passage for the pressure ring . A third oil flow passage groove portion formed along the axial direction on an inner peripheral surface along the axial direction of the differential case facing the groove portion, and the second oil flow passage groove portion; Said third oil flow passage A second oil hole is formed along the axial direction by a first oil flow passage groove formed in the outer groove plate and the outer clutch plate, and the second clutch is rotated by the inner clutch plate by the rotation of the left and right side gears. The oil hole is repeated in a half-open state and a fully-open state .
[0011]
DETAILED DESCRIPTION OF THE INVENTION
(First embodiment)
1 to 4 show a first embodiment of the present invention.
[0012]
In this embodiment, in the LSD of the conventional example shown in FIGS. 5 and 6, the pressure ring 2, between the one end wall 1c and the other end wall 1b of the case 1 and between the processing hole 1f. 3, as according to the inner circumferential surface of the multi-plate friction clutch 8, 9 and the case 1 of the trunk portion 1a is obtained by forming a circular oil holes 20 as a first oil hole.
[0013]
FIG. 1 shows the appearance of the LSD of the present embodiment (a differential carrier is not shown), and FIG. 2 (a) is a pressure that engages with a groove 1e formed on the inner periphery of the body 1a of the case 1. The relationship between the engagement protrusion A of the rings 2 and 3 and the engagement protrusion A of the outer clutch plate OCP of the multi-plate friction clutches 8 and 9 and the outer periphery of the pressure rings 2 and 3 and the inner of the multi-plate friction clutches 8 and 9 The state of the clearance between the outer periphery of the outer clutch plate and the inner peripheral surface of the case 1 is shown.
[0014]
As shown in FIG. 1, between the one end wall 1c and the other end wall 1b of the case 1, a plurality (six in this embodiment) of oil holes 20 are concentrically arranged in the same phase in the circumferential direction. The oil holes 20 are formed between the inner periphery of the body 1a of the case 1 and the outer periphery of the pressure rings 2, 3 and the multi-plate friction clutches 8, 9 at the center. The first and second oil flow passage grooves are located on the inner periphery of the body 1a of the case 1 and the outer periphery of the pressure rings 2 and 3 and the multi-plate friction clutches 8 and 9, respectively . A circular oil flow passage groove is formed. As shown in FIG. 3 , a substantially semicircular oil flow passage groove portion E, which is a third oil flow passage groove portion, is formed on the inner peripheral surface of the body portion 1a of the case 1 at an equal pitch between the concave groove portions 1e. Is formed.
[0015]
FIG. 2B shows the pressure rings 2 and 3, and a substantially semicircular oil flow passage groove portion B, which is a third oil flow passage groove portion, is formed between the engagement protrusions A and the oil flow passage groove portion E. It is formed at the same pitch as this pitch. FIG. 2C shows an outer clutch plate OCP constituting the multi-plate friction clutches 8 and 9, and an oil flow passage groove portion which is a first semicircular oil flow passage groove portion between the engagement protrusions A. C is formed at an equal pitch. Since the pressure protrusions 2 and 3 and the outer clutch plate OCP are respectively engaged with the concave groove 1e of the case 1 and rotate integrally with the case 1, the oil flow passage groove portion is formed as shown in FIG. B and the oil flow passage groove C are present at the same phase position together with the oil hole 20 formed between the one end wall 1c and the other end wall 1b of the case 1.
[0016]
FIG. 2D shows an inner clutch plate ICP constituting the multi-plate friction clutches 8 and 9, and a substantially semicircular oil flow passage groove portion D which is a first oil flow passage groove portion is used for the oil flow passage. It is formed at the same pitch as the groove C.
[0017]
Since the inner clutch plate ICP rotates integrally with the side gears 6 and 7, as shown in the right side of FIG. 4 (a) and the state of FIG. 4 (c), the oil flow passage groove D of the inner clutch plate ICP and the outer clutch When the oil flow passage groove portion C of the plate OCP is in phase, as shown in the left side of FIG. 4A and the state of FIG. 4B, the oil flow passage groove portion D of the inner clutch plate ICP and the outer The oil flow passage groove portion C of the clutch plate OCP may not be in phase, but when it is in phase, the substantially circular second oil holes extend from the wall portions at both ends of the case 1 to the inside of the pressure rings 2 and 3. The circulation of oil is ensured through a through hole 1d provided at a substantially central position in the axial direction of the body 1a of the case 1.
[0018]
That is, when a difference in rotation occurs between the left and right wheels as the vehicle travels, a difference in rotation also occurs in the outer clutch plate and the inner clutch plate. The state shown in FIG. 4 is repeated, and the state shown in FIG. In the case of the difference in rotation, the oil easily flows between the clutch plates, and when the state shown in FIG. 4 (c) is reached, the oil passage that is intermittent in the partial portion passes through in the axial direction. The oil flows to the center of the case 1 together with the oil flow passage groove 1E formed on the inner periphery of the case 1, flows out of the case through the hole 1d provided in the center of the case 1, and the oil inside and outside the case Circulation will take place. As a result, lubrication of the friction surface of the pressure ring and the inner clutch plate, lubrication between the clutch plates, lubrication of the gear meshing part of the side gear and pinion gear, lubrication of the pinion gear rotation support part of the cross shaft, etc. are improved, and the friction resistance The cooling property of various internal members is improved, and the stability of the LSD can be improved.
[0019]
The oil flow passage groove 1E formed on the inner periphery of the case 1 is always in communication with the oil holes 20 at both ends of the case 1, and the flow rate of oil circulating inside and outside the case 1 is shown in FIG. Although the number is less than that in the fully open state shown in FIG. 1, circulation at a certain flow rate is performed.
[0020]
【The invention's effect】
According to the present invention, a circulation hole for oil circulation is formed at substantially the center in the length direction of the body part constituting the case, and a plurality of outer peripheral parts of the multi-plate clutch and the pressure ring on both sides are formed from both ends of the case. The oil flow passage groove portion is formed so as to overlap in the circumferential direction, and the oil flow passage groove portion is formed on the inner peripheral surface along the axial direction of the case so as to face the oil flow passage groove portion of the pressure ring. Since it is formed along the axial direction, oil circulation can be ensured from both ends of the case through the inside of the pressure, and various members constituting the LSD can be sufficiently lubricated and cooled.
[Brief description of the drawings]
FIG. 1 is an external view of a limited slip differential gear according to a first embodiment of the present invention, in which (a) is a front view, (b) is a left side view, and (c) is a right side view.
2 shows the internal structure of the case of FIG. 1, (a) is a partial cross-sectional view showing the relationship between the pressure ring / outer clutch plate and the inner periphery of the case, (b) is a partial perspective view of the pressure ring, (C) is a partial perspective view of an outer clutch plate, (d) is a partial perspective view of an inner clutch plate.
FIG. 3 is a partial cross-sectional view showing the internal configuration of the case of FIG.
4A is a perspective view showing a positional relationship between the groove portion of the inner clutch plate and the groove portion of the pressure ring inside the case of FIG. 1, and FIG. 4B is a perspective view showing a state in which both the groove portions are inconsistent; ) Is a perspective view showing a state in which both groove portions coincide with each other.
FIG. 5 is a cross-sectional view of a conventional limited slip differential gear.
6 is a cross-sectional view illustrating a side gear in the limited slip differential gear of FIG. 5;
[Explanation of symbols]
1 Differential case
1 a body part, 1b other end part, 1c one end part, 1d hole part, 1e concave groove part 1f processing hole, 1d hole part 2,3 pressure ring 4 pinion shaft 5 pinion gears 6, 7 side gears 8, 9 multiple plates Friction clutch 10, 11 Axle 12 Ring gear 13 Pinion gear 20 Oil hole A Protrusion part B to D Oil flow path groove part

Claims (1)

エンジンからの駆動力により回転するディファレンシャルケースと、前記ケースと一体的に回転すると共に駆動輪の車軸方向に移動可能に前記ケース内に互いに対向して収容された左右一対のプレッシャーリングと、前記左右一対のプレッシャーリングに挟持されたピニオンシャフトに回転自在に取り付けられたピニオンギアと、前記ピニオンギアを両側から挟むように配置され、それぞれ前記ピニオンギアに噛合して前記駆動輪の車軸に駆動力を伝達する左右一対のサイドギアと、前記ケースの側壁面と前記左右一対の各サイドギアの間にそれぞれ設けられ、前記プレッシャーリングの車軸方向外方への移動により圧着されて前記両サイドギアの差動を制限する左右一対の多板摩擦クラッチと、前記左右一対のプレッシャーリングおよび前記ピニオンシャフトに形成され、前記一対のプレッシャーリングを互いに離れる前記車軸方向外方に移動させるカム分力機構と、を有し、前記左右の各多板摩擦クラッチは、前記ディファレンシャルケースおよび前記左右の各プレッシャーリングと一体に回転する複数の外クラッチプレートと、前記左右の各サイドギアと一体に回転する複数の内クラッチプレートとを交互に配置した構成とし、前記ケースを構成する胴部の長さ方向の略中央にオイル流通用の流通孔を形成したリミテッドスリップディファレンシャルギアにおいて、
前記ディファレンシャルケースの左右両端部の側壁に、前記駆動輪の車軸を中心とする同一円周上に間隔を有してそれぞれ形成された複数の第1のオイル孔と、
前記各多板摩擦クラッチを構成する外クラッチプレートと内クラッチプレートの外周部に周方向に沿って間隔を有してそれぞれ形成され、軸方向に見て前記第1のオイル孔の一部と重なり合う位置に径方向外方に向かって開口した第1のオイル流通路用溝部と、
前記各プレッシャーリングの外周部に周方向に沿って間隔を有してそれぞれ形成され、軸方向に見て前記第1のオイル孔の一部と重なり合う位置に径方向外方に向かって開口した第2のオイル流通路用溝部と、
前記プレッシャーリングの第2のオイル流通路用溝部に対向して前記ディファレンシャルケースの軸方向に沿った内周面に軸方向に沿って形成した第3のオイル流通路用溝部と、を有し、前記第2のオイル流通路用溝部と、前記第3のオイル流通路用溝部および前記外クラッチプレートに形成された第1のオイル流通路用溝部とにより軸方向に沿った第2のオイル孔を形成し、前記左右の各サイドギアの回転で前記内クラッチプレートにより前記第2のオイル孔が半開と全開の状態に繰り返されることを特徴とするリミテッドスリップディファレンシャルギア。
A differential case rotated by the driving force from the engine, said case and a pair of left and right pressure rings housed facing each other inside movably the case to the axle direction of the driving wheels as well as rotate integrally, the right and left A pinion gear rotatably mounted on a pinion shaft sandwiched between a pair of pressure rings, and a pinion gear disposed so as to sandwich the pinion gear from both sides. a pair of left and right side gears for transmitting, respectively provided between the side wall surface and the right and left pair of the side gears of the case, the differential of the two side gears is crimped by the movement towards the axle direction outside the respective pressure ring a pair of left and right multi-plate friction clutch limited to, the pair of left and right pressure rings and Serial formed on the pinion shaft, anda cam component force mechanism for moving the axle outwardly away from each other said pair of pressure rings, the right and left of the multi-plate friction clutch, the differential case and the left and right A plurality of outer clutch plates that rotate integrally with each pressure ring and a plurality of inner clutch plates that rotate integrally with each of the left and right side gears are arranged alternately, and the length direction of the trunk portion constituting the case In the limited slip differential gear in which a distribution hole for oil distribution is formed in the approximate center of
A plurality of first oil holes respectively formed at intervals on the same circumference centered on the axle of the drive wheel on the side walls of the left and right ends of the differential case ;
The outer clutch plate and the inner clutch plate constituting each of the multi-plate friction clutches are formed on the outer peripheral portions of the outer clutch plate and the inner clutch plate at intervals along the circumferential direction, and overlap with a part of the first oil hole when viewed in the axial direction. A first oil flow passage groove opening radially outward at a position;
The pressure rings are formed on the outer periphery of each pressure ring with a space along the circumferential direction, and are opened radially outwardly at positions overlapping with a part of the first oil hole when viewed in the axial direction. 2 oil flow passage grooves,
A third oil flow path groove formed along the axial direction on the inner peripheral surface along the axial direction of the differential case, opposite to the second oil flow path groove of the pressure ring , A second oil hole extending in the axial direction is formed by the second oil flow passage groove, the third oil flow passage groove and the first oil flow passage groove formed in the outer clutch plate. The limited slip differential gear is characterized in that the second oil hole is repeated in a half-open state and a full-open state by the inner clutch plate by the rotation of the left and right side gears.
JP2000146207A 2000-05-18 2000-05-18 Limited slip differential gear Expired - Lifetime JP3737338B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2000146207A JP3737338B2 (en) 2000-05-18 2000-05-18 Limited slip differential gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2000146207A JP3737338B2 (en) 2000-05-18 2000-05-18 Limited slip differential gear

Publications (2)

Publication Number Publication Date
JP2001323989A JP2001323989A (en) 2001-11-22
JP3737338B2 true JP3737338B2 (en) 2006-01-18

Family

ID=18652599

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2000146207A Expired - Lifetime JP3737338B2 (en) 2000-05-18 2000-05-18 Limited slip differential gear

Country Status (1)

Country Link
JP (1) JP3737338B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7201692B2 (en) * 2004-09-08 2007-04-10 Eaton Corporation Coupling device and improved clutch lubrication arrangement therefor

Also Published As

Publication number Publication date
JP2001323989A (en) 2001-11-22

Similar Documents

Publication Publication Date Title
EP3106695B1 (en) Clutch and differential device with same
JP3737338B2 (en) Limited slip differential gear
JPS6338586B2 (en)
JP3781811B2 (en) Differential limiter
WO2017146059A1 (en) Differential gear
ES2944128T3 (en) Transmission system for four-wheel drive vehicles
JP4316196B2 (en) Differential limiter
JP2606235Y2 (en) Lubrication structure of differential gear
JP3866339B2 (en) Parallel axis differential for vehicles
JPH08226525A (en) Differential device
JP2004068904A (en) Differential gear
JP3262844B2 (en) Slip limited differential gearing
JPH0478860B2 (en)
US11920664B2 (en) Limited-slip differential system
JPS61140617A (en) Lubricating construction of rolling bearing
KR19990023519A (en) Viscous Coupling
JP5478339B2 (en) Lubrication structure of spline fitting part in transmission
JP2017115993A (en) Differential device
JP4857465B2 (en) Planetary gear unit
CN108240448B (en) Differential and vehicle
JP2017155864A (en) Transmission device
WO2017146003A1 (en) Differential gear
JP3776289B2 (en) Limited slip differential gear
WO2017170590A1 (en) Gearing
JP2002174322A (en) Differential gear

Legal Events

Date Code Title Description
A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20050531

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20050607

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20050804

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20051004

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20051026

R150 Certificate of patent or registration of utility model

Ref document number: 3737338

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091104

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101104

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101104

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111104

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121104

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121104

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131104

Year of fee payment: 8

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term