JP3559061B2 - Differential device - Google Patents

Differential device Download PDF

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Publication number
JP3559061B2
JP3559061B2 JP4386594A JP4386594A JP3559061B2 JP 3559061 B2 JP3559061 B2 JP 3559061B2 JP 4386594 A JP4386594 A JP 4386594A JP 4386594 A JP4386594 A JP 4386594A JP 3559061 B2 JP3559061 B2 JP 3559061B2
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Japan
Prior art keywords
gear
differential
meshing
vehicle
gears
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JPH07253147A (en
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泰彦 石川
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栃木富士産業株式会社
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Description

【0001】
【産業上の利用分野】
この発明は、車両のデファレンシャル装置に関する。
【0002】
【従来の技術】
特公平1−33701号公報に図8のようなデファレンシャル装置201が記載されている。これは、デフケース203の収納孔205,207に収納されたヘリカルピニオンギヤ209,211と、これらを介して連結されたヘリカルサイドギヤ213,215を備えている。
【0003】
【発明が解決しようとする課題】
エンジンの駆動力はデフケース203を回転させピニオンギヤ209,211からサイドギヤ213,215を介して駆動車輪側に分配される。このときピニオンギヤ209,211はサイドギヤ213,215との噛合い圧力角により生じる噛合い反力を受け、サイドギヤ213,215はこの噛合い圧力角とねじれ角とにより生じる噛合いスラスト力を受ける。これらの力により生じた摩擦抵抗によってデファレンシャル装置201の差動が制限される。
【0004】
しかし、従来各ギヤの歯は回転方向に対称形であり、従って上記のように差動制限力を左右する噛合い圧力角は車両の前進時と後進時の各噛合い側で同一であるから前進時と後進時のトランスファレシオ(空転側車輪トルクに対するグリップ側車輪トルクの比)は同一である。エンジンブレーキ作動時のABS(アンチロックブレーキシステム)との干渉を避けるためには後進時のトランスファレシオは小さくしたいが、従来はデファレンシャル装置201のような構成で後進時だけトランスファレシオを小さくすることはできなかった。
【0005】
そこで、この発明は、トランスファレシオを車両の前進時には大きく後進時には小さくできるデファレンシャル装置の提供を目的とする。
【0006】
【課題を解決するための手段】
第1発明のデファレンシャル装置は、エンジンの駆動力により回転するデフケースと、デフケースに設けられた収納孔に摺動回転自在に収納されたピニオンギヤと、ピニオンギヤを介して連結された一対の車輪側サイドギヤとを備え、車両前進時の各ギヤの噛合い圧力角αを車両後進時の各ギヤの噛合い圧力角βより大きくしたことを特徴とする。
【0007】
第2発明のデファレンシャル装置は、ピニオンギヤとサイドギヤとをヘリカルギヤで構成した請求項1記載のデファレンシャル装置である。
【0008】
第3発明のデファレンシャル装置は、車両の前進時に各サイドギヤに対向方向のスラスト力が生じるねじれ角を与えた請求項2に記載のデファレンシャル装置である。
【0009】
【作用】
車両前進時の噛合い側でのサイドギヤとピニオンギヤの噛合い圧力角αを車両後進時の噛合い側での噛合い圧力角βより大きくしたから、前進時は大きい噛合い反力と噛合いスラスト力(請求項2の構成)が生じて大きなトランスファレシオが得られ、後進時は噛合い反力と噛合いスラスト力が小さくなってトランスファレシオを小さくできる。
【0010】
こうして、前進時には充分な差動制限力が得られると共に、エンジンブレーキとABSとの干渉を防止できる。
【0011】
【実施例】
図1ないし図7により第3発明の一実施例を説明する。図1はこの実施例を示し、図7はこの実施例を用いた車両の動力系を示している。左右の方向はこの車両及び図1での左右の方向である。
【0012】
図7のように、この動力系は、エンジン1、トランスミッション3、プロペラシャフト5、リヤデフ7(後輪側に配置された実施例のデファレンシャル装置)、後車軸9,11、左右の後輪13,15、左右の前輪17,19などから構成されている。
【0013】
リヤデフ7のデフケース21はデフキャリヤ23内に配置されており、デフケース21にはリングギヤ25が固定され、リングギヤ25はドライブピニオンギヤ27と噛合っている。ドライブピニオンギヤ27はプロペラシャフト5側に連結されたドライブピニオンシャフト29と一体に形成されている。こうして、エンジン1の駆動力はトランスミッション3とプロペラシャフト5とを介してデフケース21を回転駆動する。
【0014】
図1のように、デフケース21はケーシング本体31とカバー33とをボルト35で固定して構成されている。デフケース21の内部には中空のヘリカルサイドギヤ37,39が左右に配置されている。各サイドギヤ37,39はデフケース21に形成された軸支部41,43により回転自在に支承されると共に、互いの間に形成された軸支部45により各自由端を支承し、センターリングしている。
【0015】
これらのサイドギヤ37,39はそれぞれ左右の後車軸9,11側にスプライン連結されており、サイドギヤ37の内側には各車軸9,11が突当たるスラストブロック47が配置されている。各サイドギヤ37,39の間にはスラストワッシャ49が配置され、サイドギヤ39とデフケース21との間にはワッシャ51が配置されている。
【0016】
デフケース本体31には長短の収納孔53,55が周方向に4組形成されており、これらの収納孔53,55にはそれぞれ長短のヘリカルピニオンギヤ57,59が摺動回転自在に収納されている。
【0017】
長いピニオンギヤ57は第1ギヤ部61(図2に図示)と第2ギヤ部63及びこれらを連結する小径の軸部65とからなり、第2ギヤ部63は図3のように右のサイドギヤ39と噛合っている。又、図2のように短いピニオンギヤ59の左半部67は第1ギヤ部61と噛合い、右半部69は左のサイドギヤ37と噛合っている。なお、スラストワッシャ49に形成された凸部71は上記の軸部65と回転方向に係合し、スラストワッシャ49の回り止めをしている。
【0018】
デフケース21には開口73,75,77が設けられ、オイル溜りのオイルがこれらからデフケース21に流出入し、各ギヤの噛合い部、収納孔53,55の壁面、ワッシャ49,51などの摺動部を潤滑する。
【0019】
デフケース21を回転させるエンジン1の駆動力はピニオンギヤ57,59を介してサイドギヤ39,37を押圧し回転させて左右の後輪13,15に分配される。後輪間に駆動抵抗差が生じると、ピニオンギヤ57,59の自転によりエンジン1の駆動力は左右各側に差動分配される。
【0020】
こうした、トルク伝達の間、ピニオンギヤ57,59の歯先はサイドギヤ37,39との間の噛合い圧力角により生じる噛合い反力を受け、収納孔53,55の壁面に押付けられて摩擦抵抗を発生させる。又、サイドギヤ37,39はねじれ角と噛合い圧力角とにより生じる噛合いスラスト力を受けて、ワッシャ49,51やデフケース21との間で摩擦抵抗を発生させる。各サイドギヤ37,39のねじれ角は各サイドギヤ37,39の噛合いスラスト力が車両の前進時に内向き(対向方向)になり、後進時は外向きになるような方向にされている。噛合いスラスト力をこのような方向にしたことにより、後輪13,15の一方が空転したときグリップしている車輪側サイドギヤの噛合いスラスト力と空転している車輪側サイドギヤの噛合いスラスト力との差だけ、前進時の摩擦抵抗は後進時より大きくなる。
【0021】
これらの摩擦抵抗により、トルク感応型の差動制限力が得られる。
【0022】
図4は右サイドギヤ39の左側面図であり、図5は同方向から見たサイドギヤ39の歯79のプロフィールである。又、図2,3,4,5の矢印81は車両前進時のデフケース21の回転方向を示している。従って、図5において矢印83側がピニオンギヤ57と前進時に噛合い、矢印85側が後進時に噛合うことになる。そして歯79は非対称にされ前進時噛合側の圧力角αを後進時噛合い側の圧力角βより大きくしてある。左サイドギヤ37も同様に前進時噛合側の圧力角を後進時噛合い側の圧力角より大きくしてあり、図2,3のように各ピニオンギヤ57,59もサイドギヤ37,39に合わせた圧力角を与えている。
【0023】
図6は車両の旋回時にサイドギヤ37,39に生じる噛合いスラスト力の前進時と後進時の変化を示す図面である。矢印81は前進時のデフケース21の回転方向であり、この回転方向は図2にも示すように短いピニオンギヤ59から長いピニオンギヤ57の方向に向いている。又、ロックトルクは旋回の内輪側に生じるトルクであり、スピントルクは外輪側に受けるトルクである。
【0024】
上記のように、サイドギヤ37,39は前進時圧力角αでピニオンギヤ59,57と噛合う。前進時の右旋回では左サイドギヤ37(旋回の外輪側)はデフケース21より先行回転するが路面からの抵抗により噛合いが圧力角αである前進時噛合い側に移り回転方向と逆向きの小さいスピントルクを受ける。又、右のサイドギヤ39は回転方向と同じ向きの大きなロックトルクが生じる。左旋回時は内輪と外輪が逆になりサイドギヤ37に回転方向と同じ向きのロックトルクが生じサイドギヤ39は回転方向と逆向きのスピントルクを受ける。
【0025】
また、サイドギヤ37,39は後進時圧力角βでピニオンギヤ59,57と噛み合う。後進時の右旋回では、左サイドギヤ37(旋回の外側)はデフケース21より、先行回転するが路面からの抵抗により、噛み合いが圧力角βである後進時噛み合い側に移り回転方向と逆向きの小さいスピントルクを受ける。又、右のサイドギヤ39は、大きなロックトルクが生じる。左旋回時には内輪と外輪が逆になりサイドギヤ37に回転方向と同じ向きのロックトルクが生じサイドギヤ39は回転方向と逆向きのスピントルクを受ける。
【0026】
後進時は各旋回方向で前進時と反対方向のロックトルクとスピントルクが生じる。
【0027】
上記のように、各ギヤは車両の前進時に圧力角α側で噛合い後進時に圧力角β側で噛合うから、ピニオンギヤ57,59が受ける噛合い反力やサイドギヤ37,39が受ける噛合いスラスト力は前進時は大きく後進時はそれよりも小さくなり、前進時の差動制限力を大きくし後進時の差動制限力を小さくすることができる。
【0028】
歯形が前進時と後進時とで対称であった従来のデファレンシャル装置では、例えば圧力角α,βが共に22.5°であるとトランスファレシオ(空転側車輪トルクに対するグリップ側車輪トルクの比)は前進時と後進時共に2.54である。これに対して、この実施例では前進側は圧力角αを30°にしてトランスファレシオ2.81を得、後進時は圧力角βを10°にしてトランスファを2.32まで小さくしている。
【0029】
従って、前進時は充分大きな差動制限力が得られると共に、後進時は差動制限力を小さくして、前進時のエンジンブレーキ作動中(リヤデフ7でのトルク伝達方向が後進走行時と同じ向きになる)ABSとの干渉を避けることができる。
【0030】
こうして、リヤデフ7が構成されており、図7の車両は大トルクを掛ける発進時や加速時には、従来のデファレンシャル装置201より大きな差動制限力が得られて直進安定性が向上し、旋回時は適度な差動制限力により円滑で安定な旋回性が得られる。又、上記のようにエンジンブレーキ作動時は差動制限力が小さくなりABSとの干渉が防止される。
【0031】
なお、実施例と異ってピニオンギヤを等長にし、これらをサイドギヤの両外側で噛合わせるか又はサイドギヤの間で噛合わせるように構成してもよい。
【0032】
【発明の効果】
この発明のデファレンシャル装置は、各ギヤの車両前進時の噛合い圧力角αを後進時の噛合い圧力角βより大きくしたからトランスファレシオを前進時に大きく後進時に小さくすることができる。
【図面の簡単な説明】
【図1】一実施例の断面図である。
【図2】図1のX−X断面図である。
【図3】図1のY−Y断面図である。
【図4】サイドギヤの左側面図である。
【図5】サイドギヤの歯を拡大した図面である。
【図6】実施例においてサイドギヤに生じる噛合いスラスト力の方向変化を示す図面である。
【図7】図1の実施例を用いた車両の動力系を示すスケルトン機構図である。
【図8】従来の断面図である。
【符号の説明】
7 リヤデフ
37,39 ヘリカルサイドギヤ
53,55 収納孔
57,59 ヘリカルピニオンギヤ
α,β 噛合い圧力角
[0001]
[Industrial applications]
The present invention relates to a differential device for a vehicle.
[0002]
[Prior art]
Japanese Patent Publication No. 1-33701 discloses a differential device 201 as shown in FIG. This is provided with helical pinion gears 209 and 211 stored in storage holes 205 and 207 of the differential case 203, and helical side gears 213 and 215 connected via these.
[0003]
[Problems to be solved by the invention]
The driving force of the engine rotates the differential case 203 and is distributed from the pinion gears 209 and 211 to the driving wheels via the side gears 213 and 215. At this time, the pinion gears 209 and 211 receive a meshing reaction force generated by the meshing pressure angle with the side gears 213 and 215, and the side gears 213 and 215 receive a meshing thrust force generated by the meshing pressure angle and the torsion angle. The frictional resistance generated by these forces limits the differential of the differential device 201.
[0004]
However, conventionally, the teeth of each gear are symmetrical in the rotational direction, and therefore, as described above, the meshing pressure angle that affects the differential limiting force is the same on each meshing side when the vehicle moves forward and when the vehicle moves backward. The transfer ratio (the ratio of the wheel torque on the grip side to the wheel torque on the idling side) during forward movement and reverse movement is the same. In order to avoid interference with the ABS (anti-lock brake system) when the engine brake is operating, it is desirable to reduce the transfer ratio during reverse travel. However, conventionally, it is not possible to reduce the transfer ratio only during reverse travel by using a configuration such as the differential device 201. could not.
[0005]
Accordingly, it is an object of the present invention to provide a differential device capable of reducing a transfer ratio when the vehicle is moving forward and decreasing the transfer ratio when the vehicle is moving backward.
[0006]
[Means for Solving the Problems]
A differential device according to a first aspect of the present invention includes a differential case that is rotated by a driving force of an engine, a pinion gear that is slidably and rotatably stored in a storage hole provided in the differential case, and a pair of wheel-side side gears that are connected via the pinion gear. And the meshing pressure angle α of each gear when the vehicle is moving forward is larger than the meshing pressure angle β of each gear when the vehicle is moving backward.
[0007]
The differential device according to a second aspect of the present invention is the differential device according to claim 1, wherein the pinion gear and the side gear are formed by helical gears.
[0008]
The differential device according to a third aspect of the present invention is the differential device according to claim 2, wherein each side gear is provided with a twist angle at which a thrust force in an opposing direction is generated when the vehicle advances.
[0009]
[Action]
The meshing pressure angle α between the side gear and the pinion gear on the meshing side when the vehicle is moving forward is larger than the meshing pressure angle β on the meshing side when the vehicle is moving backward. A large transfer ratio is obtained by the generation of the force (the configuration of claim 2), and when the vehicle is moving in reverse, the meshing reaction force and the meshing thrust force are reduced, so that the transfer ratio can be reduced.
[0010]
In this way, a sufficient differential limiting force can be obtained when the vehicle advances, and interference between the engine brake and the ABS can be prevented.
[0011]
【Example】
An embodiment of the third invention will be described with reference to FIGS. FIG. 1 shows this embodiment, and FIG. 7 shows a power system of a vehicle using this embodiment. The left and right directions are the left and right directions in this vehicle and FIG.
[0012]
As shown in FIG. 7, this power system includes an engine 1, a transmission 3, a propeller shaft 5, a rear differential 7 (a differential device of the embodiment disposed on the rear wheel side), rear axles 9 and 11, left and right rear wheels 13 and 15, left and right front wheels 17, 19, and the like.
[0013]
The differential case 21 of the rear differential 7 is arranged in a differential carrier 23, and a ring gear 25 is fixed to the differential case 21, and the ring gear 25 meshes with a drive pinion gear 27. The drive pinion gear 27 is formed integrally with a drive pinion shaft 29 connected to the propeller shaft 5 side. Thus, the driving force of the engine 1 rotationally drives the differential case 21 via the transmission 3 and the propeller shaft 5.
[0014]
As shown in FIG. 1, the differential case 21 is configured by fixing a casing body 31 and a cover 33 with bolts 35. Inside the differential case 21, hollow helical side gears 37 and 39 are arranged on the left and right. The side gears 37 and 39 are rotatably supported by shaft supports 41 and 43 formed on the differential case 21, and each free end is supported and centered by a shaft support 45 formed therebetween.
[0015]
These side gears 37 and 39 are spline-connected to the left and right rear axles 9 and 11, respectively, and a thrust block 47 against which the axles 9 and 11 abut is arranged inside the side gear 37. A thrust washer 49 is disposed between the side gears 37 and 39, and a washer 51 is disposed between the side gear 39 and the differential case 21.
[0016]
Four sets of long and short storage holes 53 and 55 are formed in the differential case body 31 in the circumferential direction, and long and short helical pinion gears 57 and 59 are slidably and rotatably stored in these storage holes 53 and 55, respectively. .
[0017]
The long pinion gear 57 includes a first gear portion 61 (shown in FIG. 2), a second gear portion 63, and a small-diameter shaft portion 65 connecting the first gear portion 61 and the second gear portion 63. As shown in FIG. Is engaged with. As shown in FIG. 2, the left half 67 of the short pinion gear 59 meshes with the first gear 61, and the right half 69 meshes with the left side gear 37. In addition, the convex portion 71 formed on the thrust washer 49 is engaged with the shaft portion 65 in the rotation direction to prevent the thrust washer 49 from rotating.
[0018]
Openings 73, 75, 77 are provided in the differential case 21, and the oil in the oil sump flows into and out of the differential case 21, and the meshing portions of the respective gears, the wall surfaces of the storage holes 53, 55, and the slides of the washers 49, 51 and the like are provided. Lubricate moving parts.
[0019]
The driving force of the engine 1 for rotating the differential case 21 is distributed to the right and left rear wheels 13 and 15 by pressing and rotating the side gears 39 and 37 via the pinion gears 57 and 59. When a driving resistance difference occurs between the rear wheels, the driving force of the engine 1 is differentially distributed to the left and right sides by the rotation of the pinion gears 57 and 59.
[0020]
During such torque transmission, the tooth tips of the pinion gears 57 and 59 receive a meshing reaction force generated by the meshing pressure angle with the side gears 37 and 39, and are pressed against the wall surfaces of the storage holes 53 and 55 to reduce frictional resistance. generate. Further, the side gears 37 and 39 receive a meshing thrust force generated by the twist angle and the meshing pressure angle, and generate frictional resistance between the washers 49 and 51 and the differential case 21. The torsion angle of each side gear 37, 39 is set such that the meshing thrust force of each side gear 37, 39 becomes inward (opposing direction) when the vehicle moves forward, and outward when the vehicle moves backward. By setting the meshing thrust force in such a direction, the meshing thrust force of the wheel side gear that is gripping when one of the rear wheels 13, 15 is idle and the meshing thrust force of the wheel side gear that is idling are gripped. The frictional resistance at the time of forward movement becomes larger than that at the time of reverse movement.
[0021]
These frictional resistances provide a torque-sensitive differential limiting force.
[0022]
FIG. 4 is a left side view of the right side gear 39, and FIG. 5 is a profile of the teeth 79 of the side gear 39 viewed from the same direction. Arrows 81 in FIGS. 2, 3, 4, and 5 indicate the rotation direction of the differential case 21 when the vehicle moves forward. Therefore, in FIG. 5, the arrow 83 side meshes with the pinion gear 57 when moving forward, and the arrow 85 side meshes with moving backward. The teeth 79 are asymmetric so that the pressure angle α on the forward meshing side is larger than the pressure angle β on the backward meshing side. Similarly, in the left side gear 37, the pressure angle on the meshing side during forward movement is larger than the pressure angle on the meshing side during reverse movement, and the pinion gears 57, 59 are also pressure angles adjusted to the side gears 37, 39 as shown in FIGS. Is given.
[0023]
FIG. 6 is a diagram showing changes in the meshing thrust force generated in the side gears 37 and 39 when the vehicle turns, when the vehicle advances and when the vehicle reverses. The arrow 81 indicates the direction of rotation of the differential case 21 during forward movement, and this direction of rotation is from the short pinion gear 59 to the long pinion gear 57 as shown in FIG. The lock torque is a torque generated on the inner wheel side of the turn, and the spin torque is a torque received on the outer wheel side.
[0024]
As described above, the side gears 37 and 39 mesh with the pinion gears 59 and 57 at the forward pressure angle α. In a right turn during forward movement, the left side gear 37 (outer wheel side of the turn) rotates ahead of the differential case 21, but shifts to a forward meshing side in which meshing is at a pressure angle α due to resistance from a road surface, and is opposite to the rotation direction. Receives a small spin torque. The right side gear 39 generates a large lock torque in the same direction as the rotation direction. When turning left, the inner wheel and the outer wheel are reversed, and a lock torque in the same direction as the rotation direction is generated in the side gear 37, and the side gear 39 receives a spin torque in the opposite direction to the rotation direction.
[0025]
Further, the side gears 37 and 39 mesh with the pinion gears 59 and 57 at the pressure angle β during reverse movement. In a right turn at the time of reverse movement, the left side gear 37 (outside of the turn) rotates forward from the differential case 21, but due to resistance from the road surface, shifts to a meshing side at a reverse meshing with the pressure angle β and is opposite to the rotation direction. Receives a small spin torque. The right side gear 39 generates a large lock torque. When turning left, the inner wheel and the outer wheel are reversed, and a lock torque in the same direction as the rotation direction is generated in the side gear 37, and the side gear 39 receives a spin torque in the opposite direction to the rotation direction.
[0026]
When the vehicle is moving backward, a lock torque and a spin torque are generated in the respective turning directions in the directions opposite to those at the time of moving forward.
[0027]
As described above, each gear meshes on the pressure angle α side when the vehicle advances, and meshes on the pressure angle β side when the vehicle moves backward, so that the meshing reaction force received by the pinion gears 57 and 59 and the meshing thrust force received by the side gears 37 and 39 Is larger when the vehicle is moving forward and smaller when the vehicle is moving backward, so that the differential limiting force at the time of moving forward can be increased and the differential limiting force at the time of moving backward can be reduced.
[0028]
In a conventional differential device in which the tooth profile is symmetrical between forward and reverse travels, for example, if both pressure angles α and β are 22.5 °, the transfer ratio (ratio of grip-side wheel torque to idle-side wheel torque) becomes It is 2.54 for both forward and backward travel. On the other hand, in this embodiment, the pressure angle α is set to 30 ° on the forward side to obtain a transfer ratio of 2.81, and when the vehicle is moving backward, the pressure angle β is set to 10 ° to reduce the transfer to 2.32.
[0029]
Accordingly, a sufficiently large differential limiting force can be obtained when the vehicle is moving forward, and the differential limiting force can be reduced when the vehicle is moving backward, so that the torque transmission direction of the rear differential 7 is the same as that during the reverse running during engine braking operation during forward driving. ) Interference with the ABS can be avoided.
[0030]
In this manner, the rear differential 7 is configured. In the vehicle shown in FIG. 7, at the time of starting or accelerating applying a large torque, a larger differential limiting force than the conventional differential device 201 is obtained, and the straight running stability is improved. Smooth and stable turning performance can be obtained by an appropriate differential limiting force. Also, as described above, during the operation of the engine brake, the differential limiting force is reduced, and interference with the ABS is prevented.
[0031]
Note that, unlike the embodiment, the pinion gears may have the same length, and may be configured to mesh on both outer sides of the side gear or between the side gears.
[0032]
【The invention's effect】
In the differential device according to the present invention, since the meshing pressure angle α of each gear when the vehicle is moving forward is larger than the meshing pressure angle β when the vehicle is moving backward, the transfer ratio can be increased when moving forward and decreased when moving backward.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of one embodiment.
FIG. 2 is a sectional view taken along line XX of FIG.
FIG. 3 is a sectional view taken along line YY of FIG. 1;
FIG. 4 is a left side view of the side gear.
FIG. 5 is an enlarged view of teeth of a side gear.
FIG. 6 is a diagram showing a change in direction of a meshing thrust force generated in a side gear in the embodiment.
FIG. 7 is a skeleton diagram showing a power system of a vehicle using the embodiment of FIG. 1;
FIG. 8 is a conventional sectional view.
[Explanation of symbols]
7 Rear differential 37, 39 Helical side gear 53, 55 Storage hole 57, 59 Helical pinion gear α, β Mesh pressure angle

Claims (3)

エンジンの駆動力により回転するデフケースと、デフケースに設けられた収納孔に摺動回転自在に収納されたピニオンギヤと、ピニオンギヤを介して連結された一対の車輪側サイドギヤとを備え、車両前進時の各ギヤの噛合い圧力角αを車両後進時の各ギヤの噛合い圧力角βより大きくしたことを特徴とするデファレンシャル装置。A differential case that is rotated by the driving force of the engine, a pinion gear that is slidably and rotatably stored in a storage hole provided in the differential case, and a pair of wheel-side side gears connected via the pinion gear are provided. A differential gear characterized in that the gear engagement pressure angle α is made larger than the gear engagement pressure angle β of each gear when the vehicle moves backward. ピニオンギヤとサイドギヤとをヘリカルギヤで構成した請求項1記載のデファレンシャル装置。2. The differential device according to claim 1, wherein the pinion gear and the side gear are constituted by helical gears. 車両の前進時に各サイドギヤに対向方向のスラスト力が生じるねじれ角を与えた請求項2に記載のデファレンシャル装置。The differential device according to claim 2, wherein each side gear is provided with a torsion angle at which a thrust force in an opposing direction is generated when the vehicle moves forward.
JP4386594A 1994-03-15 1994-03-15 Differential device Expired - Fee Related JP3559061B2 (en)

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JP2004278762A (en) * 2003-03-18 2004-10-07 Fuji Heavy Ind Ltd Differential device
DE102008042431A1 (en) 2008-09-29 2010-04-01 Robert Bosch Gmbh Reduction gear and starter device of an internal combustion engine
CN104565277B (en) * 2014-12-30 2017-02-01 东风汽车公司 Planetary differential structure of electronically-controlled transfer case
WO2018074008A1 (en) * 2016-10-19 2018-04-26 三菱電機株式会社 Speed reducer and robot

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JPS50702B2 (en) * 1971-08-28 1975-01-10
JPS5683652A (en) * 1979-12-07 1981-07-08 Toyota Motor Corp Asymmetric tooth form type involute screw gear
US4677876A (en) * 1984-02-13 1987-07-07 Tractech, Inc. Torque-proportioning differential with cylindrical spacer
US4625585A (en) * 1985-01-09 1986-12-02 Tractech, Inc. Torque-proportioning differential with sectional housing
JPH0317344U (en) * 1989-06-28 1991-02-20
JPH0610997A (en) * 1992-06-23 1994-01-21 Tochigi Fuji Ind Co Ltd Slip limiting differential gear device
JPH0633999A (en) * 1992-07-15 1994-02-08 Tochigi Fuji Ind Co Ltd Differential gear

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