JPS639452Y2 - - Google Patents
Info
- Publication number
- JPS639452Y2 JPS639452Y2 JP16399281U JP16399281U JPS639452Y2 JP S639452 Y2 JPS639452 Y2 JP S639452Y2 JP 16399281 U JP16399281 U JP 16399281U JP 16399281 U JP16399281 U JP 16399281U JP S639452 Y2 JPS639452 Y2 JP S639452Y2
- Authority
- JP
- Japan
- Prior art keywords
- ring gear
- case
- fitting
- differential case
- differential
- 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
Links
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 238000004512 die casting Methods 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
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
Landscapes
- Motor Power Transmission Devices (AREA)
- Retarders (AREA)
- General Details Of Gearings (AREA)
Description
【考案の詳細な説明】
この考案は、自動車のデイフアレンシヤル装置
の改良に関するものである。[Detailed Description of the Invention] This invention relates to an improvement of a differential device for an automobile.
一般に、自動車のデイフアレンシヤル装置では
実開昭55−97258号で示すように、ピニオンとサ
イドギヤとが内蔵されデイフアレンシヤルケース
の外側に、ドライブピニオンに噛み合うリングギ
ヤを嵌め込み、デイフアレンシヤルケースのフラ
ンジにボルト固定している。 Generally, as shown in Utility Model Application Publication No. 55-97258, an automobile differential device has a built-in pinion and a side gear, and a ring gear that meshes with the drive pinion is fitted onto the outside of the differential case. It is bolted to the case flange.
ところで、デイフアレンシヤルケースの外側に
リングギヤを嵌め込む場合、嵌合間隙が大きけれ
ば組付け作業は楽に行なえるが、リングギヤに作
用する荷重がボルトに直接かかるので、ボルトが
緩みやすく、ドライブピニオンとの噛み合いにず
れが生じて、異常摩耗や歯打音が発生したり、時
には噛み合いが外れる等の問題があつた。 By the way, when fitting a ring gear to the outside of a differential case, if the fitting gap is large, the assembly work can be done easily, but since the load acting on the ring gear is applied directly to the bolts, the bolts tend to loosen, and the drive pinion This caused problems such as abnormal wear, rattling noise, and sometimes disengagement.
この考案は、上記従来の問題点に鑑みてなされ
たもので、デイフアレンシヤルケースをリングギ
ヤよりも膨張係数の大きい金属で形成して、リン
グギヤとデイフアレンシヤルケースとの嵌合間隙
を、車両の非使用状態では所定のすきまを有する
ように設定して組付け作業の容易化を図ると共
に、使用状態では締り嵌めとなるように設定して
荷重がボルトに直接かかるのを緩和するように工
夫したものである。 This idea was made in view of the above-mentioned conventional problems.The differential case is formed of a metal with a larger coefficient of expansion than the ring gear, and the fitting gap between the ring gear and the differential case is When the vehicle is not in use, it is set to have a predetermined clearance to facilitate assembly work, and when it is in use, it is set to be an interference fit to alleviate the load that is applied directly to the bolt. It was devised.
以下、この考案の実施例を添付図面について詳
細に説明する。 Hereinafter, embodiments of this invention will be described in detail with reference to the accompanying drawings.
第１図に示すように、自動車のデイフアレンシ
ヤル装置は、フアイナル・ギヤ・セツト１が内蔵
されたデイフアレンシヤルキヤリア２に、ピニオ
ン１１とサイドギヤ１２とが内蔵されたデイフア
レンシヤルケース３を組込んで構成する。 As shown in Fig. 1, an automobile differential device consists of a differential case 2 in which a final gear set 1 is built-in, a differential case 2 in which a pinion 11 and a side gear 12 are built-in. Configure by incorporating 3.
該ケース３の外側嵌合軸部４にはリングギヤ５
の嵌合孔６を嵌め込み、該リングギヤ５はケース
３のフランジ７にボルト８，…，８で締結固定す
る。 A ring gear 5 is attached to the outer fitting shaft portion 4 of the case 3.
The ring gear 5 is fastened and fixed to the flange 7 of the case 3 with bolts 8, . . . , 8.
該リングギヤ５には、プロペラシヤフトに軸部
９を連結したドライブピニオン１０を噛み合わせ
る。 A drive pinion 10 having a shaft portion 9 connected to a propeller shaft is meshed with the ring gear 5.
上記デイフアレンシヤルケース３は、アルミダ
イキヤストで形成すると共に、上記リングギヤ５
は、鋳鉄で形成する。 The differential case 3 is formed of aluminum die casting, and the ring gear 5
is made of cast iron.
つまり、ケース３は、リングギヤ５よりも線膨
張係数αの大きい金属で形成するのである。 In other words, the case 3 is made of a metal having a larger coefficient of linear expansion α than the ring gear 5.
線膨張係数αは、アルミダイキヤストαA1＝
21.4×10-6／deg（温度が１度上昇したときの伸び
率）、鋳鉄αFe＝12.0×10-6degである。 Linear expansion coefficient α is aluminum die casting αA1=
21.4×10 -6 /deg (elongation rate when temperature increases by 1 degree), cast iron αFe = 12.0×10 -6 deg.
なお、ケース３がアルミダイキヤスト製である
と、ケース３が軽量化する。 Note that when the case 3 is made of aluminum die-casting, the weight of the case 3 is reduced.
一方、ケース３の外側嵌合軸部４とリングギヤ
５の嵌合孔６との嵌合間隙ｔは、車両の非使用状
態、即ち組付時の15〜18℃の常温域では、組付け
が容易なすきまばめ（日本工業規格によるもの）
に設定する一方、車両の使用状態、即ち走行中に
ドライブピニオン１０とリングギヤ５との噛み合
い摩擦でリングギヤ５が50〜80℃に昇温して膨張
する常用域では、締り嵌めとなるように設定す
る。 On the other hand, the fitting gap t between the outer fitting shaft portion 4 of the case 3 and the fitting hole 6 of the ring gear 5 is such that the fitting gap t between the outer fitting shaft portion 4 of the case 3 and the fitting hole 6 of the ring gear 5 is such that the fitting gap t between the outer fitting shaft portion 4 of the case 3 and the fitting hole 6 of the ring gear 5 is such that when the vehicle is not in use, that is, in the normal temperature range of 15 to 18° C. Easy loose fit (according to Japanese Industrial Standards)
On the other hand, in the usage state of the vehicle, that is, in the normal operating range where the ring gear 5 heats up to 50 to 80 degrees Celsius and expands due to meshing friction between the drive pinion 10 and the ring gear 5 while the vehicle is running, it is set to be an interference fit. do.
例えば、アルミ製ケース３の外側嵌合軸部４の
外径d1を107.978（mm）とし、鋳鉄製リングギヤ５
の嵌合孔６の内径d2を108.009（mm）とすると、常
温域（15℃）に対して、常用域（50℃）では、約
50μも嵌合間隙ｔが狭められてリングギヤ５の嵌
合孔６とケース３の外側嵌合軸部４とは、締り嵌
め状態となる。 For example, the outer diameter d1 of the outer fitting shaft portion 4 of the aluminum case 3 is 107.978 (mm), and the cast iron ring gear 5
If the inner diameter d2 of the fitting hole 6 is 108.009 (mm), then in the normal temperature range (15°C), the normal operating range (50°C) is approximately
The fitting gap t is narrowed by 50 μm, and the fitting hole 6 of the ring gear 5 and the outer fitting shaft portion 4 of the case 3 are in an interference fit state.
しかして、デイフアレンシヤルケース３とリン
グギヤ５とを上記のように構成すると、リングギ
ヤ５の組付時は15〜18℃の常用域であるから、嵌
合孔６とケース３の外側嵌合軸部４との嵌合間隙
ｔは大きく、スムースに嵌め込むことができる。 Therefore, when the differential case 3 and the ring gear 5 are constructed as described above, the fitting hole 6 and the outside fitting of the case 3 are The fitting gap t between the shaft portion 4 and the shaft portion 4 is large, so that the fitting can be smoothly fitted.
つぎに、車両の使用状態（常用域）では、第２
図のように、ケース３の外側嵌合軸部４が摩擦熱
で50〜80℃に昇温して膨張するので嵌合間隙ｔは
小さくなり、締りばめとなる。 Next, in the usage state of the vehicle (regular use area), the second
As shown in the figure, the outer fitting shaft portion 4 of the case 3 is heated to 50 to 80° C. due to frictional heat and expands, so the fitting gap t becomes smaller, resulting in an interference fit.
従つて、リングギヤ５に作用する荷重の大部分
は嵌合部分で受け合うことができるので、ボルト
８に直接かかるのが緩和され、ボルト８が緩みに
くくなつて、ドライブピニオン１０との噛み合い
にずれが生じにくくなるのである。 Therefore, most of the load acting on the ring gear 5 can be received at the fitting portion, so that the load applied directly to the bolt 8 is alleviated, making it difficult for the bolt 8 to loosen, and preventing misalignment in engagement with the drive pinion 10. This makes it less likely that this will occur.
なお、本実施例においては、嵌合間隙ｔをすき
まばめに設定したものを記載したが、本考案はこ
れに限られるものではなく、ケース３とリングギ
ヤ５の組付が容易であるならば、嵌合間隙ｔはす
きまばめによる値よりもさらに小さい値に設定す
ることができる。 In this embodiment, the fitting gap t is set to be a loose fit, but the present invention is not limited to this, and if the case 3 and the ring gear 5 can be easily assembled. , the fitting gap t can be set to a value even smaller than the value obtained by loose fit.
以上のように、この考案によれば、デイフアレ
ンシヤルケースを、リングギヤよりも膨張係数の
大きい金属で形成したものであるから、嵌合間隙
を、車両の非使用状態で所定のすきまを有するよ
うに設定し得て、リングギヤの組付け作業が容易
に行なえるようになる。 As described above, according to this invention, since the differential case is formed of a metal with a larger coefficient of expansion than the ring gear, the fitting gap is maintained at a predetermined gap when the vehicle is not in use. This allows the ring gear to be easily assembled.
また、車両の使用状態ではケースの膨張で嵌合
間隙が締り嵌めとなるので、リングギヤに作用す
る荷重を嵌合部分で受け合うことができ、ボルト
に直接かかるのが緩和され、ボルトが緩みにくく
なつてドライブピニオンとの噛み合いずれが生じ
にくくなる結果、異常摩耗や歯打音の発生がなく
なり、噛み合いが外れるという事故もなくなる。 In addition, when the vehicle is in use, the case expands and the fitting gap becomes a tight fit, so the load acting on the ring gear can be received at the fitting part, reducing the load applied directly to the bolt, making it difficult for the bolt to loosen. As a result, misalignment with the drive pinion becomes less likely to occur, and as a result, abnormal wear and rattling noises are eliminated, and accidents such as disengagement are also eliminated.
第１図は非使用状態のデイフアレンシヤル装置
の断面図、第２図は使用状態のデイフアレンシヤ
ル装置の断面図である。
３……デイフアレンシヤルケース、４……外側
嵌合軸部、５……リングギヤ、６……嵌合孔、７
……フランジ、８……ボルト、１０……ドライブ
ピニオン、ｔ……嵌合間隙。
FIG. 1 is a sectional view of the differential device in an unused state, and FIG. 2 is a sectional view of the differential device in a used state. 3... Differential case, 4... Outer fitting shaft portion, 5... Ring gear, 6... Fitting hole, 7
...Flange, 8...Bolt, 10...Drive pinion, t...Fitting gap.
Claims (1)
レンシヤルケースと、該デイフアレンシヤルケー
ス外側に嵌められ、該デイフアレンシヤルケース
に形成されたフランジにボルト固定されるリング
ギヤとを備え、上記デイフアレンシヤルケース
は、リングギヤよりも膨張係数の大きい金属で形
成されて、リングギヤとデイフアレンシヤルケー
スとの嵌合間隙は、車両の非使用状態では所定の
すきまを有し、使用状態では締り嵌めとなるよう
に設定されていることを特徴とする自動車のデイ
フアレンシヤル装置。 The differential case includes a differential case in which a pinion and a side gear are built in, and a ring gear that is fitted on the outside of the differential case and bolted to a flange formed on the differential case. The differential case is made of metal with a larger coefficient of expansion than the ring gear, and the fitting gap between the ring gear and the differential case has a predetermined clearance when the vehicle is not in use, and an interference fit when the vehicle is in use. A differential device for an automobile, characterized in that the differential device is configured to:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16399281U JPS5868431U (en) | 1981-11-02 | 1981-11-02 | Automotive differential device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16399281U JPS5868431U (en) | 1981-11-02 | 1981-11-02 | Automotive differential device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5868431U JPS5868431U (en) | 1983-05-10 |
| JPS639452Y2 true JPS639452Y2 (en) | 1988-03-22 |
Family
ID=29956264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16399281U Granted JPS5868431U (en) | 1981-11-02 | 1981-11-02 | Automotive differential device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5868431U (en) |
-
1981
- 1981-11-02 JP JP16399281U patent/JPS5868431U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5868431U (en) | 1983-05-10 |
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