JP3751488B2 - Differential device for FF vehicle transmission - Google Patents

Differential device for FF vehicle transmission Download PDF

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Publication number
JP3751488B2
JP3751488B2 JP32692499A JP32692499A JP3751488B2 JP 3751488 B2 JP3751488 B2 JP 3751488B2 JP 32692499 A JP32692499 A JP 32692499A JP 32692499 A JP32692499 A JP 32692499A JP 3751488 B2 JP3751488 B2 JP 3751488B2
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gear
differential case
differential
case
holes
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JP2001141038A (en
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靖博 新倉
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Univance Corp
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Univance Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/048—Type of gearings to be lubricated, cooled or heated
    • F16H57/0482—Gearings with gears having orbital motion
    • F16H57/0483—Axle or inter-axle differentials

Description

【０００１】
【発明の属する技術分野】
本発明はＦＦ（フロントエンジン・フロントドライブ）車両用変速機の差動装置に関し、特に、ドライブシャフトが取り付けられていない状態でも潤滑油の洩れを防げると共に、加工の容易化，重量の低減，及びコストダウンを図ることができるＦＦ車両用変速機の差動装置に関する。
【０００２】
【従来の技術】
ＦＦ（フロントエンジン・フロントドライブ）車両に搭載される変速機は、一般に、差動装置と共に同一のケース内に収容されており、ケース内に封入された同一の潤滑油で変速機構の潤滑と差動装置の潤滑を行うようになっている。
【０００３】
従来、このＦＦ車両用変速機は、車両に搭載され、差動装置にドライブシャフトが取り付けられた状態においては、ドライブシャフトの外周面とケースとの間に設けられたシール部材によってケース内が密閉され、ケース内の潤滑油が洩れないようになっていた。
【０００４】
しかし、従来のＦＦ車両用変速機によると、ドライブシャフトが取り外された、変速機単体としての完成時には、ケース内に潤滑油を密封することができないため、車両メーカーでの潤滑油の注入が必要となり、このため、注油設備がない車両メーカー（変速機を自社で生産していないメーカーなど）の需要に応えることができなかった。
【０００５】
そこで、上記問題を解決する、従来のＦＦ車両用変速機として、例えば、特開平１０−２１３２０９号公報に開示されるものがある。
【０００６】
図４は、上記公報に開示されるものと同種の構造のＦＦ車両用変速機の差動装置１の断面を示す。差動装置１は、後述するドライブシャフトが貫通する貫通孔３ａ，３ｂを有し、内部に潤滑油を収容した変速機のケース３内に変速機構（一部のみ図示）２と共に収容されており、変速機構２の出力部材となる減速ギヤ４に噛合したリングギヤ５と、貫通孔６ａを有する蓋部材６Ａと貫通孔６ｂを有する収容部材６Ｂをリングギヤ５と共にボルト７により一体化することによって形成され、つば部６ｃから駆動力を入力して回転するデフケース６と、ケース３内においてデフケース６を回転自在に支持するベアリング８，９と、デフケース６の収容部材６Ｂ内においてデフケース６の回転軸と直交する方向に伸びると共に、端部が収容部材６Ｂに係合し、デフケース６と一体になって回転するピニオンシャフト１０と、ピニオンシャフト１０に回転自在に支持されたピニオンギヤ１１と、ピニオンギヤ１１と噛み合うギヤ部１２ａとギヤ部１２ａから貫通孔６ａ，６ｂを貫通してデフケースの外部へ伸びた円筒部１２ｂよりなり、ドライブシャフト１５Ａ，１５Ｂとスプライン嵌合するスプラインが内周面に形成された中空部１２ｃを有したサイドギヤ１２Ａ，１２Ｂと、サイドギヤ１２Ａ，１２Ｂの中空部１２ｃのギヤ部１２ａ側の開口を閉塞するキャップ１３Ａ，１３Ｂと、ケース３の貫通孔３ａ，３ｂ内においてサイドギヤ１２Ａ，１２Ｂの円筒部１２ｂの外周面とケース３との間に設けられた油シール機構１４Ａ，１４Ｂより構成されている。尚、６ｄはデフケース６に形成された窓である。
【０００７】
以上の構成を有するＦＦ車両用変速機によると、サイドギヤ１２Ａ，１２Ｂの円筒部１２ｂが貫通孔６ａ，６ｂを貫通してデフケースの外部へ伸びてケース３の貫通孔３ａ，３ｂまで到達するようにし、貫通孔３ａ，３ｂ内において円筒部１２ｂとケース３の間に油シール機構１４Ａ，１４Ｂを設けたため、潤滑油がサイドギヤ１２Ａ，１２Ｂの円筒部１２ｂの外周面に沿ってケース３の貫通孔３ａ，３ｂから流れ出ようとするのを油シール機構１４Ａ，１４Ｂによって防ぐことができる。また、サイドギヤ１２Ａ，１２Ｂの中空部１２ｃのギヤ部１２ａ側の開口をキャップ１３Ａ，１３Ｂで閉塞したため、潤滑油がサイドギヤ１２Ａ，１２Ｂの中空部１２ｃに沿ってケース３の貫通孔３ａ，３ｂから流れ出ようとするのをキャップ１３Ａ，１３Ｂによって防ぐことができる。従って、ドライブシャフト１５Ａ，１５Ｂが取り付けられていない状態でも潤滑油の洩れを防ぐことができる。
【０００８】
【発明が解決しようとする課題】
しかし、従来のＦＦ車両用変速機によると、サイドギヤの円筒部を変速機のケースの貫通孔まで到達する長さにする必要があるため、円筒部の長さが通常の長さに比べ何倍にもなり、加工時（特に、鍛造による加工の時）に型の問題で加工が困難になるという不都合がある。また、デフケースはサイドギヤ等を収容できるように蓋部材と収容部材に２分割されているため、各部品の剛性を高めるために肉厚が増加し、これによって重量が増加するという不都合がある。また、部品点数の増加や、合わせ面の加工の必要性によりコストアップを招く。
【０００９】
従って、本発明の目的はドライブシャフトが取り付けられていない状態でも潤滑油の洩れを防げると共に、加工の容易化，重量の低減，及びコストダウンを図ることができるＦＦ車両用変速機の差動装置を提供することである。
【００１０】
【課題を解決するための手段】
本発明は上記の目的を達成するため、所定の位置に窓、及び第１及び第２のドライブシャフトが貫通する第１及び第２の貫通孔を有するように単一の部材で構成され、前記第１及び第２のドライブシャフトが貫通する第１及び第２の貫通孔を有した変速機のケースの内部に収容されて、前記変速機のトルク出力部からトルクを受けて回転するデフケースと、前記デフケースを貫通して前記デフケースの内部へ挿入され、前記デフケースと一体になって回転するピニオンシャフトに回転自在に支持されたピニオンギヤと、前記ピニオンギヤと噛み合うと共に、前記第１及び第２のドライブシャフトとスプライン嵌合する嵌合孔を有した第１及び第２のギヤ部材、及び前記デフケースの前記第１及び第２の貫通孔を貫通することにより、一端が前記第１及び第２のギヤ部材の端部に圧接嵌合すると共に、他端が前記デフケースより外部へ伸び、前記第１及び第２のドライブシャフトが挿通する挿通孔を有した第１及び第２の円筒部材よりなる第１及び第２のサイドギヤと、前記変速機のケースの前記第１及び第２の貫通孔の内周面と前記第１及び第２の円筒部材の前記デフケースより外部へ伸びた部分の外周面の間に挿入された第１及び第２の油シール機構と、前記第１及び第２のギヤ部材の前記嵌合孔の前記ピニオンギヤ側の開口を閉塞する第１及び第２キャップを備え、前記ピニオンギヤ、及び前記第１及び第２のギヤ部材は前記窓から挿入されて前記デフケースの内部の所定の位置に配置され、前記第１及び第２の円筒部材は、前記デフケースの内部に前記ピニオンギヤ、及び前記第１及び第２のギヤ部材が挿入された後、前記デフケースの前記第１及び第２の貫通孔から挿入されて前記第１及び第２のギヤ部材の端部に圧接嵌合される構成を有したＦＦ車両用変速機の差動装置を提供するものである。
【００１１】
【発明の実施の形態】
以下、本発明のＦＦ車両用変速機の差動装置を添付図面を参照しながら詳細に説明する。
【００１２】
図１は本発明の第１の実施の形態に係るＦＦ車両用変速機の差動装置を示す。この図において、図４と同一の部分には同一の引用数字，符号を付したので重複する説明は省略する。
【００１３】
このＦＦ車両用変速機の差動装置は、デフケース６内に収容されたギヤ部材１２ｄとデフケース６の貫通孔６ａ，６ｂを貫通する円筒部材１２ｅを圧接嵌合によって連結してサイドギヤ１２Ａ，１２Ｂを形成し、円筒部材１２ｅのデフケース６より外部へ突出した部分の外周面とケース３の貫通孔３ａ，３ｂの内周面の間に油シール機構１４Ａ，１４Ｂを配置して構成されている。
【００１４】
ギヤ部材１２ｄは、ドライブシャフト１５Ａ，１５Ｂとスプライン嵌合する嵌合孔１２ｆを有し、ピニオンギヤ１１と共にデフケース６の窓６ｄからデフケース６内へ挿入されることにより、ピニオンギヤ１１と共に所定の位置関係でデフケース６内に収容された構成を有している。
【００１５】
円筒部材１２ｅは、ドライブシャフト１５Ａ，１５Ｂを挿通する挿通孔１２ｇを有し、デフケース６の内部にピニオンギヤ１１、及びギヤ部材１２ｄが挿入された後、デフケース６の貫通孔６ａ，６ｂから挿入されることにより、デフケース６の貫通孔６ａ，６ｂを貫通し、一端がデフケース６内のギヤ部材１２ｄの端部に圧接嵌合により連結されると共に、他端がデフケース６より外部へ伸びた構成を有している。
【００１６】
図２はサイドギヤ１２Ａの拡大図を示し、ギヤ部材１２ｄと円筒部材１２ｅはそれぞれ階段状の圧接嵌合面１２ｈ，１２ｉを有し、両者の圧接嵌合面１２ｈ，１２ｉの嵌合によって連結されることによりサイドギヤ１２Ａが形成されている。ギヤ部材１２ｄと円筒部材１２ｅの連結は、車両走行時に円筒部材１２ｅに大きな力が作用しないので適度な結合力で充分であり、圧接嵌合面１２ｈ，１２ｉの圧接嵌合による連結でも何ら問題はない。なお、サイドギヤ１２Ｂもサイドギヤ１２Ａと同一の構成になっているため、サイドギヤ１２Ｂの説明は省略する。
【００１７】
このような構成を有する本実施の形態のＦＦ車両用変速機の差動装置によると、デフケース６内に収容されたギヤ部材１２ｄとデフケース６の貫通孔６ａ，６ｂを貫通する円筒部材１２ｅを圧接嵌合によって連結してサイドギヤ１２Ａ，１２Ｂを形成しているため、サイドギヤ１２Ａ，１２Ｂを構成するギヤ部材１２ｄが小型化し、これの加工を容易にすることができる。また、ギヤ部材１２ｄの小型化によりギヤ部材１２ｄがデフケース６の窓６ｄからデフケース６内へ挿入できるようになるため、デフケース６を単一の部材で構成でき、重量の低減，及びコストダウンを図ることができる。また、サイドギヤ１２Ａ，１２Ｂを構成する円筒部材１２ｅが貫通孔６ａ，６ｂを貫通してケース３の貫通孔３ａ，３ｂまで伸び、貫通孔３ａ，３ｂの内周面と円筒部材１２ｅの外周面の間に油シール機構１４Ａ，１４Ｂが設けられているため、潤滑油が円筒部材１２ｅの外周面に沿ってケース３の貫通孔３ａ，３ｂから流れ出ようとするのを油シール機構１４Ａ，１４Ｂによって防ぐことができる。更に、サイドギヤ１２Ａ，１２Ｂを構成するギヤ部材１２ｄの嵌合孔１２ｆのピニオンギヤ１１側の開口をキャップ１３Ａ，１３Ｂで閉塞したため、潤滑油がギヤ部材１２ｄの嵌合孔１２ｆに沿ってケース３の貫通孔３ａ，３ｂから流れ出ようとするのをキャップ１３Ａ，１３Ｂによって防ぐことができる。従って、ドライブシャフト１５Ａ，１５Ｂが取り付けられていない状態でも潤滑油の洩れを防ぐことができる。
【００１８】
図３は本発明の第２の実施の形態に係るＦＦ車両用変速機の差動装置のサイドギヤ１２Ａを示し、ギヤ部材１２ｄと円筒部材１２ｅを連結する各々の圧接嵌合面１２ｈ，１２ｉの階段状の方向が第１の実施の形態と反対になっている。このような構成でも第１の実施の形態と同様な効果を得ることができる。
【００１９】
【発明の効果】
以上説明した通り、本発明のＦＦ車両用変速機の差動装置によると、デフケースの窓からデフケース内へ挿入されたギヤ部材と、デフケースにギヤ部材が挿入された後、デフケースの貫通孔から挿入される円筒部材を圧接嵌合によって連結してサイドギヤを形成し、円筒部材のデフケースより外部へ伸びた部分の外周面とケースの貫通孔の内周面の間に油シール機構を配置して構成したため、ドライブシャフトが取り付けられていない状態でも潤滑油の洩れを防げると共に、加工の容易化，重量の低減，及びコストダウンを図ることができる。
【図面の簡単な説明】
【図１】本発明の第１の実施の形態に係るＦＦ車両用変速機の差動装置を示す断面図。
【図２】第１の実施の形態に係るサイドギヤを示す部分断面図。
【図３】本発明の第２の実施の形態に係るＦＦ車両用変速機の差動装置のサイドギヤを示す部分断面図。
【図４】従来のＦＦ車両用変速機の差動装置を示す断面図。
【符号の説明】
１ 差動装置
２ 変速機構
３ ケース
３ａ，３ｂ 貫通孔
４ 減速ギヤ
５ リングギヤ
６ デフケース
６Ａ 蓋部材
６Ｂ 収容部材
６ａ，６ｂ 貫通孔
６ｃ つば部
６ｄ 窓
７ ボルト
８，９ ベアリング
１０ ピニオンシャフト
１１ ピニオンギヤ
１２Ａ，１２Ｂ サイドギヤ
１２ａ ギヤ部
１２ｂ 円筒部
１２ｃ 中空部
１２ｄ ギヤ部材
１２ｅ 円筒部材
１２ｆ 嵌合孔
１２ｇ 挿通孔
１２ｈ，１２ｉ 圧接嵌合面
１３Ａ，１３Ｂ キャップ
１４Ａ，１４Ｂ 油シール機構
１５Ａ，１５Ｂ ドライブシャフト[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a differential for an FF (front engine / front drive) vehicle transmission, and in particular, prevents leakage of lubricating oil even when a drive shaft is not attached, facilitates processing, reduces weight, and The present invention relates to a differential device for an FF vehicle transmission capable of reducing the cost.
[0002]
[Prior art]
A transmission mounted on an FF (front engine / front drive) vehicle is generally housed in the same case together with a differential gear, and is different from the lubrication of the transmission mechanism by the same lubricating oil sealed in the case. The moving device is lubricated.
[0003]
Conventionally, when this FF vehicle transmission is mounted on a vehicle and the drive shaft is attached to the differential, the inside of the case is sealed by a seal member provided between the outer peripheral surface of the drive shaft and the case. The lubricating oil in the case was not leaked.
[0004]
However, according to the conventional FF vehicle transmission, when the drive shaft is removed and the transmission itself is completed, the lubricant cannot be sealed in the case, so the vehicle manufacturer needs to inject the lubricant. For this reason, it was not possible to meet the demands of vehicle manufacturers without lubrication facilities (such as manufacturers that do not produce transmissions in-house).
[0005]
Therefore, as a conventional FF vehicle transmission that solves the above problem, for example, there is one disclosed in Japanese Patent Laid-Open No. 10-213209.
[0006]
FIG. 4 shows a cross section of the differential device 1 of the FF vehicle transmission having the same structure as that disclosed in the above publication. The differential device 1 has through-holes 3a and 3b through which a drive shaft, which will be described later, passes, and is housed together with a speed change mechanism (partially shown) 2 in a case 3 of a transmission that contains lubricating oil therein. The ring gear 5 meshed with the reduction gear 4 serving as the output member of the speed change mechanism 2, the lid member 6 </ b> A having the through hole 6 a, and the housing member 6 </ b> B having the through hole 6 b are integrated with the ring gear 5 by the bolt 7. The differential case 6 that rotates by inputting a driving force from the collar portion 6 c, the bearings 8 and 9 that rotatably support the differential case 6 in the case 3, and the rotation axis of the differential case 6 in the housing member 6 </ b> B of the differential case 6 The pinion shaft 10 that extends in the direction of rotation and engages with the housing member 6B and rotates integrally with the differential case 6, and the pinion shaft 10 A pinion gear 11 rotatably supported, a gear portion 12a meshing with the pinion gear 11, and a cylindrical portion 12b extending from the gear portion 12a through the through holes 6a and 6b and extending to the outside of the differential case, and drive shafts 15A and 15B and splines Side gears 12A and 12B having hollow portions 12c with splines to be fitted formed on the inner peripheral surface, caps 13A and 13B for closing the openings on the gear portion 12a side of the hollow portions 12c of the side gears 12A and 12B, and a case 3 In the through holes 3a and 3b, oil seal mechanisms 14A and 14B provided between the outer peripheral surface of the cylindrical portion 12b of the side gears 12A and 12B and the case 3 are configured. Reference numeral 6d denotes a window formed in the differential case 6.
[0007]
According to the FF vehicle transmission having the above configuration, the cylindrical portions 12b of the side gears 12A and 12B extend through the through holes 6a and 6b to the outside of the differential case so as to reach the through holes 3a and 3b of the case 3. Since the oil seal mechanisms 14A and 14B are provided between the cylindrical portion 12b and the case 3 in the through holes 3a and 3b, the lubricating oil passes along the outer peripheral surface of the cylindrical portion 12b of the side gears 12A and 12B. , 3b can be prevented by the oil seal mechanisms 14A, 14B. Further, since the opening on the gear portion 12a side of the hollow portion 12c of the side gears 12A and 12B is closed by the caps 13A and 13B, the lubricating oil flows out from the through holes 3a and 3b of the case 3 along the hollow portions 12c of the side gears 12A and 12B. This can be prevented by the caps 13A and 13B. Therefore, leakage of the lubricating oil can be prevented even when the drive shafts 15A and 15B are not attached.
[0008]
[Problems to be solved by the invention]
However, according to the conventional FF vehicle transmission, it is necessary to make the cylindrical portion of the side gear to reach the through hole of the case of the transmission, so the length of the cylindrical portion is several times larger than the normal length. In addition, there is an inconvenience that the processing becomes difficult due to the problem of the mold at the time of processing (particularly at the time of processing by forging). In addition, the differential case is divided into a cover member and a storage member so that the side gear and the like can be stored. Therefore, there is a disadvantage in that the thickness increases to increase the rigidity of each component, thereby increasing the weight. Further, the increase in the number of parts and the necessity of processing of the mating surfaces cause an increase in cost.
[0009]
Accordingly, an object of the present invention is to provide a differential apparatus for a transmission for an FF vehicle that can prevent leakage of lubricating oil even when a drive shaft is not attached, and can facilitate processing, reduce weight, and reduce costs. Is to provide.
[0010]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention is constituted by a single member so as to have a window at a predetermined position and first and second through holes through which the first and second drive shafts pass. A differential case that is housed in a case of the transmission having first and second through holes through which the first and second drive shafts pass and receives torque from the torque output portion of the transmission, and rotates. A pinion gear that passes through the differential case and is inserted into the differential case, and is rotatably supported by a pinion shaft that rotates integrally with the differential case, meshes with the pinion gear, and the first and second drive shafts And the first and second gear members having fitting holes for spline fitting with the first and second through holes of the differential case, so that one end is in front The first and second gears are press-fitted to the end portions of the first and second gear members, the other ends extend outward from the differential case, and have insertion holes through which the first and second drive shafts are inserted. First and second side gears made of cylindrical members, inner peripheral surfaces of the first and second through holes of the transmission case, and the differential cases of the first and second cylindrical members. The first and second oil seal mechanisms inserted between the outer peripheral surfaces of the first and second portions, and the first and second oil seal mechanisms closing the pinion gear side opening of the fitting hole of the first and second gear members. A cap, wherein the pinion gear and the first and second gear members are inserted from the window and disposed at predetermined positions inside the differential case, and the first and second cylindrical members are disposed on the differential case. Inside the pinion gear, and front After the first and second gear members are inserted, they are inserted from the first and second through holes of the differential case and press-fitted to the end portions of the first and second gear members. The present invention provides a differential device for an FF vehicle transmission.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a differential device for an FF vehicle transmission according to the present invention will be described in detail with reference to the accompanying drawings.
[0012]
FIG. 1 shows a differential device for an FF vehicle transmission according to a first embodiment of the present invention. In this figure, the same reference numerals and symbols are assigned to the same parts as in FIG.
[0013]
In this differential device for a FF vehicle transmission, the gear member 12d accommodated in the differential case 6 and the cylindrical member 12e passing through the through holes 6a and 6b of the differential case 6 are connected by press-fitting to connect the side gears 12A and 12B. The oil seal mechanisms 14A and 14B are arranged between the outer peripheral surface of the cylindrical member 12e that protrudes to the outside from the differential case 6 and the inner peripheral surfaces of the through holes 3a and 3b of the case 3.
[0014]
The gear member 12d has a fitting hole 12f for spline fitting with the drive shafts 15A and 15B, and is inserted into the differential case 6 from the window 6d of the differential case 6 together with the pinion gear 11, thereby having a predetermined positional relationship with the pinion gear 11. It has a configuration accommodated in the differential case 6.
[0015]
The cylindrical member 12e has an insertion hole 12g through which the drive shafts 15A and 15B are inserted. After the pinion gear 11 and the gear member 12d are inserted into the differential case 6, the cylindrical member 12e is inserted from the through holes 6a and 6b of the differential case 6. As a result, the through-holes 6a and 6b of the differential case 6 pass through, and one end is connected to the end of the gear member 12d in the differential case 6 by press-fitting and the other end extends from the differential case 6 to the outside. is doing.
[0016]
FIG. 2 shows an enlarged view of the side gear 12A. The gear member 12d and the cylindrical member 12e have step-like pressure contact fitting surfaces 12h and 12i, respectively, and are connected by fitting the two pressure contact fitting surfaces 12h and 12i. Thus, the side gear 12A is formed. For the connection of the gear member 12d and the cylindrical member 12e, a large force does not act on the cylindrical member 12e when the vehicle is running, so an appropriate coupling force is sufficient. Absent. Since the side gear 12B has the same configuration as the side gear 12A, the description of the side gear 12B is omitted.
[0017]
According to the differential device for an FF vehicle transmission of the present embodiment having such a configuration, the gear member 12d accommodated in the differential case 6 and the cylindrical member 12e penetrating the through holes 6a and 6b of the differential case 6 are press-contacted. Since the side gears 12A and 12B are formed by being connected by fitting, the gear member 12d constituting the side gears 12A and 12B can be reduced in size and can be easily processed. Further, since the gear member 12d can be inserted into the differential case 6 through the window 6d of the differential case 6 due to the downsizing of the gear member 12d, the differential case 6 can be configured by a single member, thereby reducing weight and cost. be able to. Further, the cylindrical member 12e constituting the side gears 12A and 12B extends through the through holes 6a and 6b to the through holes 3a and 3b of the case 3, and the inner peripheral surface of the through holes 3a and 3b and the outer peripheral surface of the cylindrical member 12e. Since the oil seal mechanisms 14A and 14B are provided therebetween, the oil seal mechanisms 14A and 14B prevent the lubricating oil from flowing out from the through holes 3a and 3b of the case 3 along the outer peripheral surface of the cylindrical member 12e. be able to. Furthermore, since the opening on the pinion gear 11 side of the fitting hole 12f of the gear member 12d constituting the side gears 12A and 12B is closed by the caps 13A and 13B, the lubricating oil penetrates the case 3 along the fitting hole 12f of the gear member 12d. It is possible to prevent the caps 13A and 13B from flowing out of the holes 3a and 3b. Therefore, leakage of the lubricating oil can be prevented even when the drive shafts 15A and 15B are not attached.
[0018]
FIG. 3 shows a side gear 12A of a differential for a FF vehicle transmission according to a second embodiment of the present invention, and steps of respective press-fitting surfaces 12h and 12i connecting the gear member 12d and the cylindrical member 12e. The direction of the shape is opposite to that of the first embodiment. Even with such a configuration, the same effects as those of the first embodiment can be obtained.
[0019]
【The invention's effect】
As described above, according to the differential device for an FF vehicle transmission of the present invention, the gear member inserted into the differential case from the window of the differential case, and the gear member inserted into the differential case and then inserted from the through hole of the differential case The cylinder member is connected by press-fitting to form a side gear, and the oil seal mechanism is arranged between the outer peripheral surface of the cylindrical member extending from the differential case and the inner peripheral surface of the through hole of the case Therefore, it is possible to prevent the lubricating oil from leaking even when the drive shaft is not attached, and to facilitate the processing, reduce the weight, and reduce the cost.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a differential device for an FF vehicle transmission according to a first embodiment of the present invention.
FIG. 2 is a partial cross-sectional view showing a side gear according to the first embodiment.
FIG. 3 is a partial sectional view showing a side gear of a differential device of an FF vehicle transmission according to a second embodiment of the present invention.
FIG. 4 is a cross-sectional view showing a differential device for a conventional FF vehicle transmission.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Differential device 2 Transmission mechanism 3 Case 3a, 3b Through-hole 4 Reduction gear 5 Ring gear 6 Differential case 6A Cover member 6B Housing member 6a, 6b Through-hole 6c Collar 6d Window 7 Bolt 8, 9 Bearing 10 Pinion shaft 11 Pinion gear 12A, 12B side gear 12a gear part 12b cylindrical part 12c hollow part 12d gear member 12e cylindrical member 12f fitting hole 12g insertion hole 12h, 12i pressure contact fitting surface 13A, 13B cap 14A, 14B oil seal mechanism 15A, 15B drive shaft

Claims (2)

所定の位置に窓、及び第１及び第２のドライブシャフトが貫通する第１及び第２の貫通孔を有するように単一の部材で構成され、前記第１及び第２のドライブシャフトが貫通する第１及び第２の貫通孔を有した変速機のケースの内部に収容されて、前記変速機のトルク出力部からトルクを受けて回転するデフケースと、
前記デフケースを貫通して前記デフケースの内部へ挿入され、前記デフケースと一体になって回転するピニオンシャフトに回転自在に支持されたピニオンギヤと、
前記ピニオンギヤと噛み合うと共に、前記第１及び第２のドライブシャフトとスプライン嵌合する嵌合孔を有した第１及び第２のギヤ部材、及び前記デフケースの前記第１及び第２の貫通孔を貫通することにより、一端が前記第１及び第２のギヤ部材の端部に圧接嵌合すると共に、他端が前記デフケースより外部へ伸び、前記第１及び第２のドライブシャフトを挿通する挿通孔を有した第１及び第２の円筒部材よりなる第１及び第２のサイドギヤと、
前記変速機のケースの前記第１及び第２の貫通孔の内周面と前記第１及び第２の円筒部材の前記デフケースより外部へ伸びた部分の外周面の間に挿入された第１及び第２の油シール機構と、
前記第１及び第２のギヤ部材の前記嵌合孔の前記ピニオンギヤ側の開口を閉塞する第１及び第２キャップを備え、
前記ピニオンギヤ、及び前記第１及び第２のギヤ部材は前記窓から挿入されて前記デフケースの内部の所定の位置に配置され、
前記第１及び第２の円筒部材は、前記デフケースの内部に前記ピニオンギヤ、及び前記第１及び第２のギヤ部材が挿入された後、前記デフケースの前記第１及び第２の貫通孔から挿入されて前記第１及び第２のギヤ部材の端部に圧接嵌合される構成を有することを特徴とするＦＦ車両用変速機の差動装置。 It is constituted by a single member so as to have a window at a predetermined position and first and second through holes through which the first and second drive shafts penetrate, and the first and second drive shafts penetrate therethrough. A differential case that is housed inside a transmission case having first and second through holes, and that receives torque from a torque output portion of the transmission and rotates;
A pinion gear that passes through the differential case and is inserted into the differential case, and is rotatably supported by a pinion shaft that rotates integrally with the differential case;
The first and second gear members having a fitting hole that engages with the pinion gear and is spline-fitted with the first and second drive shafts, and through the first and second through holes of the differential case. By doing so, one end is press-fitted to the end of the first and second gear members, and the other end extends outside from the differential case, and an insertion hole through which the first and second drive shafts are inserted First and second side gears comprising first and second cylindrical members,
First and second inserted between inner peripheral surfaces of the first and second through holes of the transmission case and outer peripheral surfaces of portions of the first and second cylindrical members extending from the differential case to the outside. A second oil seal mechanism;
A first cap and a second cap for closing the pinion gear side opening of the fitting hole of the first and second gear members;
The pinion gear, and the first and second gear members are inserted from the window and disposed at predetermined positions inside the differential case,
The first and second cylindrical members are inserted from the first and second through holes of the differential case after the pinion gear and the first and second gear members are inserted into the differential case. And a differential device for a transmission for an FF vehicle, wherein the differential gear is configured to be press-fitted to end portions of the first and second gear members. 前記第１及び第２のギヤ部材は、前記第１及び第２の円筒部材と階段状の圧接嵌合面の嵌合によって一体にされている構成の請求項１記載のＦＦ車両用変速機の差動装置。  2. The FF vehicle transmission according to claim 1, wherein the first gear member and the second gear member are integrated with the first cylindrical member and the second cylindrical member by fitting a stepped pressure contact fitting surface. 3. Differential device.
JP32692499A 1999-11-17 1999-11-17 Differential device for FF vehicle transmission Expired - Fee Related JP3751488B2 (en)

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