JP2519629Y2 - Differential case - Google Patents

Differential case

Info

Publication number
JP2519629Y2
JP2519629Y2 JP8351789U JP8351789U JP2519629Y2 JP 2519629 Y2 JP2519629 Y2 JP 2519629Y2 JP 8351789 U JP8351789 U JP 8351789U JP 8351789 U JP8351789 U JP 8351789U JP 2519629 Y2 JP2519629 Y2 JP 2519629Y2
Authority
JP
Japan
Prior art keywords
differential case
ring gear
differential
teeth
drive
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
JP8351789U
Other languages
Japanese (ja)
Other versions
JPH0323244U (en
Inventor
実 榊原
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.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors Corp
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 Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Priority to JP8351789U priority Critical patent/JP2519629Y2/en
Publication of JPH0323244U publication Critical patent/JPH0323244U/ja
Application granted granted Critical
Publication of JP2519629Y2 publication Critical patent/JP2519629Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • F16H48/00—Differential gearings
    • F16H48/06—Differential gearings with gears having orbital motion
    • F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
    • 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
    • F16H48/00—Differential gearings
    • F16H48/06—Differential gearings with gears having orbital motion
    • F16H48/08—Differential gearings with gears having orbital motion comprising bevel gears
    • F16H2048/082—Differential gearings with gears having orbital motion comprising bevel gears characterised by the arrangement of output shafts
    • 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
    • F16H48/00—Differential gearings
    • F16H48/38—Constructional details
    • F16H2048/385—Constructional details of the ring or crown gear
    • 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
    • F16H48/00—Differential gearings
    • F16H48/38—Constructional details
    • F16H48/42—Constructional details characterised by features of the input shafts, e.g. mounting of drive gears thereon
    • F16H2048/423—Constructional details characterised by features of the input shafts, e.g. mounting of drive gears thereon characterised by bearing arrangement

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Retarders (AREA)
  • General Details Of Gearings (AREA)

Description

【考案の詳細な説明】 （産業上の利用分野） 本考案は車両の終減速装置等に具備されるディファレ
ンシャルケースに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a differential case provided in a vehicle final reduction gear or the like.

（従来の技術） 従来、第３図及び第４図に示すように、表面に放射状
に向かう複数本の補強用リブ１を設けると共に、裏面に
一方向にねじれた歯2aを有するリングギヤ２を設けたデ
ィファレンシャルケース３が公知である。なお、駆動力
の伝達は、リングギヤ２と噛合するドライブピニオン４
からリングギヤ２を経て、ボルト結合によりディファレ
ンシャルケース３に伝達される。更に、図示しないディ
ファレンシャルピニオンシャフト、ディファレンシャル
ピニオンからディファレンシャルサイドギヤを経て、ス
プライン継手を介して駆動輪車軸に伝達される。(Prior Art) Conventionally, as shown in FIGS. 3 and 4, a plurality of radially extending reinforcing ribs 1 are provided on the front surface, and a ring gear 2 having teeth 2a twisted in one direction is provided on the back surface. A differential case 3 is known. The drive force is transmitted by the drive pinion 4 that meshes with the ring gear 2.
Is transmitted to the differential case 3 by bolt connection via the ring gear 2. Further, it is transmitted to a drive wheel axle via a differential pinion shaft, a differential pinion (not shown), a differential side gear, and a spline joint.

（考案が解決しようとする課題） 斯かる従来のディファレンシャルケース３にあって
は、剛性確保のために放射状に複数本の補強用リブ１が
設けられているが、ディファレンシャルケース３の左右
方向の撓みは、同一入力トルクに対して前進側より後退
側の方が大きい。これは、ディファレンシャルケース３
が受ける左右方向の負荷が、後退側は前進側に比較して
２〜３倍となるからである。後退側の負荷が前進側に比
べて大きくなるのは、以下の理由による。即ち、ディフ
ァレンシャルのハイポイドギヤは、よく知られていると
おり、歯のねじれに起因して、回転方向によってリング
ギヤの円錐頂点に近づける方向（正転時）又は遠ざける
方向（逆転時）に軸方向推力が発生する。リングギヤや
ドライブビニオンを設計する際には、通常、前進時にこ
れらの歯車がかみ合いから引き離れるような推力が発生
するように、歯のねじれ方向や軸回転方向を決定してい
る。このような設計では、後退時にはリングギヤとドラ
イブビニオンとは互いにくさびを打ち込むように食い込
む傾向があり、ケースに前進時より大きな負荷を与える
のである。このような従来のディファレンシャルケース
３において、後退側の左右の撓みを前進側のそれと略同
程度に減少するには、ディファレンシャルケース３を厚
くしなければならず、厚くすると重量が増すという問題
点があった。(Problems to be Solved by the Invention) In such a conventional differential case 3, a plurality of reinforcing ribs 1 are radially provided to ensure rigidity, but the differential case 3 is bent in the left-right direction. Is larger on the backward side than on the forward side for the same input torque. This is the differential case 3
This is because the load in the left-right direction received on the backward side is 2 to 3 times greater than that on the forward side. The load on the reverse side is larger than that on the forward side for the following reasons. In other words, as is well known, differential hypoid gears generate axial thrust in a direction that approaches the conical apex of the ring gear depending on the direction of rotation (during forward rotation) or away from it (during reverse rotation) due to the twisting of the teeth. To do. When designing a ring gear or a drive binion, the twisting direction of the teeth and the rotating direction of the shaft are usually determined so that a thrust force that pulls these gears away from the mesh is generated during forward movement. In such a design, the ring gear and the drive binion tend to bite into each other like a wedge when retracting, giving a greater load to the case than when advancing. In such a conventional differential case 3, in order to reduce the left and right flexures on the retreat side to substantially the same extent as those on the forward side, the differential case 3 must be made thicker, and the problem is that the thicker the differential case 3 becomes. there were.

本考案は上記事情に鑑みてなされたもので、重量増を
極力抑制しながら、後退側の左右の撓みを前進側のそれ
を略同程度になる如く減少させたディファレンシャルケ
ースを提供することを目的としている。The present invention has been made in view of the above circumstances, and an object thereof is to provide a differential case in which the left and right flexures on the retreat side are reduced to substantially the same extent while suppressing the weight increase as much as possible. I am trying.

（課題を解決するための手段） 上記目的を達成するため、本考案は、表面に、中心側
から外周方向に向って延びる複数本の補強用リブを有し
且つ裏面にリングギヤを設けたディファレンシャルケー
スにおいて、前記リブを、前記リングギヤの歯のねじれ
方向と逆方向に向けて設けたことを特徴とするものであ
る。(Means for Solving the Problems) In order to achieve the above object, the present invention provides a differential case having a plurality of reinforcing ribs extending from the center side toward the outer peripheral direction on the front surface and having a ring gear on the back surface. In the above, the rib is provided in a direction opposite to the twisting direction of the teeth of the ring gear.

（作用） 補強リブを、リングギヤの歯のねじれ方向と逆方向、
即ち、歯面に略直交する方向に向けて設けたから、後退
側の負荷に対する剛性が高くなり、後退側の左右の撓み
が前進側のそれと略同程度に減少する。(Function) The reinforcing rib is set in the direction opposite to the twisting direction of the teeth of the ring gear,
That is, since it is provided in the direction substantially orthogonal to the tooth surface, the rigidity against the load on the retract side is increased, and the left and right flexure on the retract side is reduced to about the same degree as that on the advance side.

（実施例） 以下、本考案の一実施例を第１図及び第２図に基づき
説明する。(Embodiment) An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

第１図は本考案のディファレンシャルケースを備えた
車両の終減速装置の断面図であり、同図中10はディファ
レンシャルキャリヤで、その左右側部に駆動輪車軸挿通
孔11,12、前側部にドライブピニオン軸挿通孔13がそれ
ぞれ設けられ、これら各挿通孔11,12の軸線と挿通孔13
の軸線は互いに直交している。FIG. 1 is a cross-sectional view of a final reduction gear of a vehicle equipped with a differential case of the present invention. In the figure, 10 is a differential carrier, drive wheel axle insertion holes 11, 12 are provided on the left and right sides of the differential carrier, and drive is provided on the front side. Pinion shaft insertion holes 13 are provided respectively, and the axis of each of these insertion holes 11 and 12 and the insertion hole 13
The axes of the are orthogonal to each other.

ディファレンシャルキャリア10内に位置して駆動輪車
軸挿通孔11,12相互間には、本考案のディファレンシャ
ルケース14が回転可能に配設されている。このディファ
レンシャルケース14は、主体15と副体16とからなる。主
体15は、円板17の中央にボス孔18を穿設すると共に、こ
のボス孔18の周縁に沿うボス筒19を円板17の表面に一体
に突設し、且つ円板17の裏面の径方向略中間部に円筒部
20を一体に突設し、更に、円板17の表面に第２図に示す
如く周方向に等間隔を存して複数本の補強用リブ21を一
体に突設してなる。副体16は、一端側が大径で他端側に
向かうに従い漸次小径となるテーパ状の円筒体22の他端
面にボス筒23を一体形成してなる。そして、主体15の円
筒部20の端面と副体16の円筒体22の端面とを突き合わせ
てボルト24にて固定することにより、主体15と副体16と
が互いに連結されて、ディファレンシャルケース14が構
成されている。このディファレンシャルケース14の両端
のボス筒19,23がディファレンシャルキャリア10の左右
側部の駆動輪車軸挿通孔11,12に円錐ころ軸受25を介し
て回転可能に支持されている。A differential case 14 of the present invention is rotatably disposed between the drive wheel axle insertion holes 11 and 12 located in the differential carrier 10. The differential case 14 includes a main body 15 and a sub body 16. The main body 15 has a boss hole 18 formed at the center of the disk 17, and a boss cylinder 19 along the peripheral edge of the boss hole 18 integrally protrudes from the front surface of the disk 17, and is provided on the back surface of the disk 17. Cylindrical part in the middle of the radial direction
20 are integrally projected, and further, a plurality of reinforcing ribs 21 are integrally projected on the surface of the disc 17 at equal intervals in the circumferential direction as shown in FIG. The sub body 16 is formed by integrally forming a boss cylinder 23 on the other end surface of a tapered cylindrical body 22 whose one end has a large diameter and whose diameter gradually decreases toward the other end. Then, the end surface of the cylindrical portion 20 of the main body 15 and the end surface of the cylindrical body 22 of the sub body 16 are butted against each other and fixed by bolts 24, whereby the main body 15 and the sub body 16 are connected to each other, and the differential case 14 is formed. It is configured. Bosses 19 and 23 at both ends of the differential case 14 are rotatably supported in the drive wheel axle insertion holes 11 and 12 on the left and right sides of the differential carrier 10 via tapered roller bearings 25.

主体15の円板17の裏面外周部にはリングギヤ26がボル
ト27により固定されている。このリングギヤ26は第２図
中破線で示す如く一方向にねじれた歯（ハイポイド・ギ
ヤ）26aを有する。主体15の円板17の表面のリブ21は、
この円板17のボス筒19から放射状に弯曲して延び、外周
円部に亘る長さを有していると共に、リングギヤ26の歯
26aのねじれ方向と逆方向にねじれた状態となってい
る。そして、各リブ21はリングギヤ26の各歯26aと直交
する状態となっている。A ring gear 26 is fixed by bolts 27 to the outer periphery of the back surface of the disk 17 of the main body 15. The ring gear 26 has teeth (hypoid gear) 26a twisted in one direction as shown by the broken line in FIG. The rib 21 on the surface of the disc 17 of the main body 15 is
The disc 17 has a boss cylinder 19 that is curved and extends radially, has a length that extends over the outer peripheral circular portion, and has teeth of the ring gear 26.
26a is twisted in the opposite direction to the twisting direction. Each rib 21 is in a state of being orthogonal to each tooth 26a of the ring gear 26.

リングギヤ26にはドライブピニオン28が噛合してお
り、このドライブピニオン28の一側面に一体に突設され
たドライブピニオン軸29は、ディファレンシャルキャリ
ア10のドライブピニオン軸挿通孔13に一対の円錐ころ軸
受30,31を介して回転可能に支持されている。このドラ
イブピニオン軸29は図示しないプロペラシャフトに連結
されている。A drive pinion 28 is meshed with the ring gear 26, and a drive pinion shaft 29 integrally provided on one side surface of the drive pinion 28 has a pair of tapered roller bearings 30 in a drive pinion shaft insertion hole 13 of the differential carrier 10. , 31 are rotatably supported via. The drive pinion shaft 29 is connected to a propeller shaft (not shown).

ディファレンシャルケース14内中央部には、駆動輪車
軸挿通孔11,12の軸線と直交方向に向けてディファレン
シャルピニオン軸32が、このディファレンシャルケース
14と一体回転可能に装着されている。このディファレン
シャルピニオン軸32の両端部にはかさ歯車よりなるディ
ファレンシャルピニオン33,34が回転可能に装着されて
いる。これら各ディファレンシャルピニオン33,34に
は、かさ歯車よりなるディファレンシャルサイドギヤ3
5,36が噛合している。これらディファレンシャルサイド
ギヤ35,36は駆動輪車軸37,38の一端部にスプライン嵌合
されている。こられ駆動輪車軸37,38の他端側は、ディ
ファレンシャルキャリア10の駆動輪車軸挿通孔11,12に
接続された車軸管39,40内に回転可能に挿通されてい
る。A differential pinion shaft 32 is provided in the center of the differential case 14 in a direction orthogonal to the axes of the drive wheel axle insertion holes 11 and 12, and this differential case is provided.
It is attached so that it can rotate together with 14. Differential pinions 33, 34, which are bevel gears, are rotatably mounted on both ends of the differential pinion shaft 32. Each of these differential pinions 33, 34 has a differential side gear 3 composed of a bevel gear.
5,36 mesh. These differential side gears 35, 36 are spline-fitted to one ends of drive wheel axles 37, 38. The other ends of the drive wheel axles 37, 38 are rotatably inserted in axle tubes 39, 40 connected to the drive wheel axle insertion holes 11, 12 of the differential carrier 10.

なお、第１図中41はドライプピニオン28の他側面に一
体に突設された短軸部42を回転可能に支持する軸受であ
る。Reference numeral 41 in FIG. 1 denotes a bearing that rotatably supports the short shaft portion 42 integrally provided on the other side surface of the dry pinion 28.

次に上記構成の終減速装置の動作を説明する。図示し
ないエンジンの駆動力は、図示しないプロペラシャフト
→ドライブピニオン軸29→ドライブピニオン28→リング
ギヤ26→ディファレンシャルケース14→ディファレンシ
ャルピニオン軸32→ディファレンシャルピニオン33,34
→ディファレンシャルサイドギヤ35,36の経路で駆動輪
車軸37,38に伝達される。Next, the operation of the final speed reducer having the above configuration will be described. The driving force of the engine (not shown) is propeller shaft → drive pinion shaft 29 → drive pinion 28 → ring gear 26 → differential case 14 → differential pinion shaft 32 → differential pinion 33, 34
→ Transmitted to the drive wheel axles 37, 38 via the differential side gears 35, 36.

このような動作時において、前進側及び後退側のいず
れにおいても、リングギヤ26とドライブピニオン28との
噛合により、ディファレンシャルケース14に負荷が作用
し、このディファレンシャルケース14に、撓みが生じ
る。前記負荷は、前進側より後退側の方が大きいが、本
考案においては、リブ21をリングギヤ26の歯26aのねじ
れ方向と逆方向に向けて設けたから、歯26aに略垂直方
向に作用する力を、リブ21で受け止めるので、後退側の
負荷に対する剛性が高くなり、後退側の左右の撓みが前
進側のそれと略同程度に減少するものである。During such an operation, the load acts on the differential case 14 due to the engagement of the ring gear 26 and the drive pinion 28 on both the forward side and the backward side, and the differential case 14 is bent. Although the load is larger on the backward side than on the forward side, in the present invention, since the rib 21 is provided in the direction opposite to the twisting direction of the teeth 26a of the ring gear 26, the force acting on the teeth 26a in a substantially vertical direction is provided. Since the ribs 21 are received by the ribs 21, the rigidity against the load on the backward side is increased, and the left and right flexures on the backward side are reduced to substantially the same extent as those on the forward side.

なお、リブはリングギヤの歯面に略直交するように設
けるのが好ましく、このためには、リブを曲線状に弯曲
させてもよいし、くの字に折曲させてもよい。又、ボス
筒19の外周壁からこれに接するように外方に延出させ、
リングギヤの歯面に略直交するように設けるようにして
もよい。The ribs are preferably provided so as to be substantially orthogonal to the tooth flanks of the ring gear. For this purpose, the ribs may be curved or curved in a dogleg shape. In addition, it extends outward from the outer peripheral wall of the boss cylinder 19 so as to come into contact with it,
It may be provided so as to be substantially orthogonal to the tooth surface of the ring gear.

（考案の効果） 以上の如く本考案は、表面に、中心側から外周方向に
向って延びる複数本の補強用リブを有し且つ裏面にリン
グギヤを設けたディファレンシャルケースにおいて、リ
ブを、リングギヤの歯のねじれ方向と逆方向に向けて設
けたことを特徴とするものである。(Effects of the Invention) As described above, according to the present invention, in a differential case having a plurality of reinforcing ribs extending from the center side toward the outer peripheral direction on the front surface and providing a ring gear on the back surface, the ribs are provided as teeth of the ring gear. It is characterized in that it is provided in the direction opposite to the twisting direction.

従って、肉厚を厚くすることなくリブの向きをリング
ギヤの歯のねじれ方向と逆方向にすることにより、後退
側の負荷に対する剛性を高めたから、重量を増加させる
ことなく後退側の左右の撓みを前進側のそれと略同程度
になる如く減少させることができるという効果を奏す
る。Therefore, the rigidity against the load on the retract side is increased by making the direction of the ribs opposite to the twisting direction of the teeth of the ring gear without increasing the wall thickness, so that the left and right deflections on the retract side are increased without increasing the weight. There is an effect that it can be reduced so that it becomes approximately the same as that on the forward side.

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

第１図及び第２図は本考案の一実施例を示し、第１図は
本考案ディファレンシャルケースを備えた終減速装置の
断面図、第２図は同装置におけるディファレンシャルケ
ースの正面図、第３図は従来のディファレンシャルケー
スの斜視図、第４図は同正面図である。 14…ディファレンシャルケース、21…補強用リブ、26…
リングギヤ、26a…リングギヤの歯。1 and 2 show an embodiment of the present invention, FIG. 1 is a sectional view of a final reduction gear having a differential case of the present invention, FIG. 2 is a front view of a differential case in the same, and FIG. FIG. 4 is a perspective view of a conventional differential case, and FIG. 4 is a front view of the same. 14 ... Differential case, 21 ... Reinforcing ribs, 26 ...
Ring gear, 26a ... Ring gear teeth.

Claims (1)

(57)【実用新案登録請求の範囲】(57) [Scope of utility model registration request] 【請求項１】表面に、中心側から外周方向に向って延び
る複数本の補強用リブを有し且つ裏面にリングギヤを設
けたディファレンシャルケースにおいて、前記リブを、
前記リングギヤの歯のねじれ方向と逆方向に向けて設け
たことを特徴とするディファレンシャルケース。1. In a differential case having a plurality of reinforcing ribs extending from the center side toward the outer peripheral direction on the front surface and having a ring gear on the back surface, the ribs are
A differential case, characterized in that it is provided in a direction opposite to the twisting direction of the teeth of the ring gear.
JP8351789U 1989-07-18 1989-07-18 Differential case Expired - Lifetime JP2519629Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8351789U JP2519629Y2 (en) 1989-07-18 1989-07-18 Differential case

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8351789U JP2519629Y2 (en) 1989-07-18 1989-07-18 Differential case

Publications (2)

Publication Number Publication Date
JPH0323244U JPH0323244U (en) 1991-03-11
JP2519629Y2 true JP2519629Y2 (en) 1996-12-11

Family

ID=31631248

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8351789U Expired - Lifetime JP2519629Y2 (en) 1989-07-18 1989-07-18 Differential case

Country Status (1)

Country Link
JP (1) JP2519629Y2 (en)

Also Published As

Publication number Publication date
JPH0323244U (en) 1991-03-11

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