JPH0342261Y2 - - Google Patents
Info
- Publication number
- JPH0342261Y2 JPH0342261Y2 JP1986043126U JP4312686U JPH0342261Y2 JP H0342261 Y2 JPH0342261 Y2 JP H0342261Y2 JP 1986043126 U JP1986043126 U JP 1986043126U JP 4312686 U JP4312686 U JP 4312686U JP H0342261 Y2 JPH0342261 Y2 JP H0342261Y2
- Authority
- JP
- Japan
- Prior art keywords
- housing
- case
- differential
- sealed chamber
- viscous fluid
- 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
- 239000012530 fluid Substances 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 16
- 230000002093 peripheral effect Effects 0.000 claims description 12
- 230000000670 limiting effect Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005489 elastic deformation Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 229920002545 silicone oil Polymers 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Landscapes
- Retarders (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 この考案は動力伝達装置に関するものである。[Detailed explanation of the idea] [Industrial application field] This invention relates to a power transmission device.
一般に車両などのデフアレンシヤル装置は、車
両旋回時に車両の駆動軸に発生する回転差、即
ち、差動を吸収して円滑な駆動走行を行なう機能
を備えているが、場合によつては、走行に支障を
来たすことがある。
In general, a differential device for a vehicle has the function of absorbing the rotational difference, or differential, that occurs in the drive shaft of the vehicle when the vehicle turns to ensure smooth driving, but in some cases, It may interfere with driving.
例えば、ぬかるみに片方の車輪が落ち込んでス
リツプ回転となつたばあい、構造上他方の車輪に
は駆動力が伝わらず、ぬかるみからの脱出ができ
なくなる。このような事態を避けるために、ある
程度以上の差動回転が両駆動軸間に発生した際
に、この差動回転を制限するようにしたのが差動
制限装置である。 For example, if one wheel falls into the mud and slips, the driving force will not be transmitted to the other wheel due to its structure, making it impossible to escape from the mud. In order to avoid such a situation, a differential limiting device is designed to limit the differential rotation when a certain amount of differential rotation occurs between the two drive shafts.
作動制限装置としては、例えば特開昭48−
77530号公報記載のようなものがあり、差動制限
装置の密閉室内部には粘性流体が充填されてい
る。粘性流体が充填された密閉室内には、該密閉
室を介して一方の伝達軸側へつづく回転板と該回
転板と対向し他方の伝達軸側へつづく回転板がそ
れぞれ設けられている。 As an operation limiting device, for example, JP-A-48-
There is a device as described in Japanese Patent No. 77530, in which the sealed chamber of the differential limiting device is filled with viscous fluid. In the sealed chamber filled with viscous fluid, there are provided a rotary plate that extends to one transmission shaft side through the sealed chamber, and a rotary plate that faces the rotary plate and continues to the other transmission shaft side.
かかる差動制限装置において、例えば片側の車
輪がぬかるみに落ちて空転が始まると、各回転板
間には相対回転が起きるが、この時、粘性流体に
よる抵抗が働き両出力軸間に差動回転制限機能が
発揮される訳であるが、一方回転板の相対回転時
に発生する熱で粘性流体の温度も上昇する。この
結果、密閉室内の内圧が高まる。この場合、各回
転板の相対回転が続くと密閉室内の内圧はさらに
上昇し、ついにはシール部材等が破損する恐れが
ある。
In such a differential limiting device, for example, when one wheel falls into the mud and starts spinning, relative rotation occurs between the rotating plates, but at this time, resistance due to viscous fluid works and differential rotation occurs between the two output shafts. Although the limiting function is achieved, the temperature of the viscous fluid also rises due to the heat generated during the relative rotation of the rotating plates. As a result, the internal pressure within the sealed chamber increases. In this case, if the relative rotation of each rotating plate continues, the internal pressure in the sealed chamber will further increase, and there is a possibility that the sealing member etc. will eventually be damaged.
このために、密閉室内の内圧が高まると例えば
特開昭58−48779号公報に見られる如く締結手段
によつて各回転板に相対回転が起きるのを防ぐ手
段が提案されている。この手段は内圧上昇時に働
く締結手段を必要とする等構造が複雑になると共
にコストの面でも望ましくなかつた。 For this reason, a means has been proposed for preventing relative rotation of the rotary plates by means of fastening means, as seen in, for example, Japanese Unexamined Patent Publication No. 58-48779, when the internal pressure in the closed chamber increases. This means requires a fastening means that operates when the internal pressure increases, resulting in a complicated structure and is also undesirable in terms of cost.
そこで、この考案は、密閉室内の内圧上昇の発
生を起きにくくすると共に、しかも、密閉室内の
内圧上昇が高まつた時には回転板の相対回転を迅
速になくして内圧上昇を抑えシール部材等の破損
を防止するようにした動力伝達装置を提供するこ
とを目的としている。 Therefore, this idea makes it difficult for the internal pressure inside the sealed chamber to rise. Furthermore, when the internal pressure inside the sealed chamber increases, the relative rotation of the rotary plate is quickly eliminated to prevent the internal pressure from rising and damage the sealing member, etc. It is an object of the present invention to provide a power transmission device that prevents this.
前記目的を達成するために、この考案にあつて
は、ケース内に回転自在に支持し、ケース内周壁
に外周壁が近接して対向したハウジングと、この
ハウジング内に粘性流体が充填された密閉室と、
この密閉室内に前記ハウジングを介して一方の伝
達軸側に係合する回転板と、該回転板と対向し他
方の伝達軸側に係合する回転板と、前記密閉室の
内圧上昇時に前記近接して対向したハウジング外
周壁がケース内周壁に接触するようにハウジング
周壁を部分的に薄くする複数の凹部とを有する構
成とした。
In order to achieve the above object, this invention includes a housing that is rotatably supported within a case and has an outer circumferential wall facing the inner circumferential wall of the case, and a sealed housing that is filled with a viscous fluid. room and
A rotary plate that engages with one transmission shaft side through the housing in this sealed chamber, a rotary plate that faces the rotary plate and engages with the other transmission shaft side, and a rotary plate that engages with the other transmission shaft side through the housing; The housing has a plurality of recesses that partially thin the housing peripheral wall so that the facing outer peripheral wall of the housing comes into contact with the inner peripheral wall of the case.
（作用）
かかる動力伝達装置において、両伝達軸間に相
対回転が起きると、粘性流体による抵抗の働きで
伝達軸間でトルクの授受が行われる。(Function) In such a power transmission device, when relative rotation occurs between the two transmission shafts, torque is transferred between the transmission shafts due to the resistance of the viscous fluid.
粘性流体の抵抗に抗して各回転板の相対回転が
継続すると相対回転時に発生する熱で粘性流体の
温度が次第に上昇しハウジングの内圧が高まる。
この時、密閉室の周壁は複数の凹部によつて部分
的に薄く、剛性が低く抑えられているため、速や
かに弾性変形してケースの内周壁と接触する。こ
れによりハウジングの回転に制動作用が働き、各
回転板の相対回転が抑制され、ハウジングの内圧
の上昇が抑えられる。ハウジング周壁の凹凸で摩
擦係数が増大し制動作用が効果的に発揮される。
ハウジングの外周壁は複数の凹部によつて表面積
が拡大されハウジング内部で発生する熱の放出を
効果的に行える。 When the relative rotation of each rotating plate continues against the resistance of the viscous fluid, the temperature of the viscous fluid gradually rises due to the heat generated during the relative rotation, and the internal pressure of the housing increases.
At this time, since the circumferential wall of the sealed chamber is partially thin due to the plurality of recesses and its rigidity is kept low, it is quickly elastically deformed and comes into contact with the inner circumferential wall of the case. This acts as a brake on the rotation of the housing, suppressing the relative rotation of each rotary plate, and suppressing an increase in the internal pressure of the housing. The unevenness of the housing peripheral wall increases the coefficient of friction and provides effective braking action.
The surface area of the outer circumferential wall of the housing is expanded by the plurality of recesses, so that heat generated inside the housing can be effectively dissipated.
以下、図面を参照しながらこの発明の一保持器
を詳細に説明する。
Hereinafter, one cage of the present invention will be explained in detail with reference to the drawings.
図中１は図外のドライブギヤによつて回転可能
なデフケースを示しており、ケース１は規定面ま
で潤滑油に浸されている。 In the figure, 1 indicates a differential case that can be rotated by a drive gear (not shown), and the case 1 is immersed in lubricating oil up to a specified surface.
デフケース１の一側にはシリコンオイル等の粘
性流体が充填された密閉室３が形成されている。 A sealed chamber 3 filled with a viscous fluid such as silicone oil is formed on one side of the differential case 1.
密閉室３は、デフケース１の内周に沿つて配置
された大径スリーブ５とこの大径スリーブ５の両
側に設けられた側板７とつば付きスリーブ９から
なるハウジング１０で形成されている。ハウジン
グ１０の内周壁には段付きのハブ１１が相対回転
自在に設けられ、ハブ１１の小径部分には前記側
板７がシール部材１３によつて密封状態で回転自
在に嵌入されている。 The sealed chamber 3 is formed of a housing 10 consisting of a large-diameter sleeve 5 disposed along the inner circumference of the differential case 1, side plates 7 provided on both sides of the large-diameter sleeve 5, and a sleeve 9 with a flange. A stepped hub 11 is provided on the inner circumferential wall of the housing 10 so as to be relatively rotatable, and the side plate 7 is rotatably fitted in a small diameter portion of the hub 11 in a sealed state by a seal member 13.
デフケース１の内周壁１ａと対向する前記大径
スリーブ５の周面には複数の凹部１５が周溝とし
て形成されている。したがつて、大径スリーブ５
の肉厚が凹部１５の部分で薄くなると共に表面面
積が拡大される。 A plurality of recesses 15 are formed as circumferential grooves on the circumferential surface of the large diameter sleeve 5 facing the inner circumferential wall 1a of the differential case 1. Therefore, the large diameter sleeve 5
The wall thickness becomes thinner at the recessed portion 15, and the surface area is expanded.
また、ハブ１１の拡大部分は、前記つば付きス
リーブ９に対して回転自在に装着されシール部材
１４によつてシールされている。つば付きスリー
ブ９のつば部９ａの外周は前記大径スリーブ５の
他端が一体的に結合されている。 Further, the enlarged portion of the hub 11 is rotatably attached to the flanged sleeve 9 and sealed by a sealing member 14. The other end of the large diameter sleeve 5 is integrally connected to the outer periphery of the flange portion 9a of the flange sleeve 9.
ハブ１１の小径部分とつば付きスリーブ９の内
周にはスプライン１７，１９が施されている。ス
プライン１９，１７には左右の出力軸W1，Ｗが
それぞれスプライン嵌合され、各出力軸W1，Ｗ
は図外の車輪駆動軸に連結されるようになる。 Splines 17 and 19 are provided on the small diameter portion of the hub 11 and on the inner periphery of the flanged sleeve 9. The left and right output shafts W 1 , W are spline-fitted to the splines 19 , 17, respectively, and the respective output shafts W 1 , W
is connected to a wheel drive shaft (not shown).
密閉室３を構成する前記大径スリーブ５の内周
と、ハブ１１の外周とにはそれぞれスプライン２
１，２３が施されていて、該スプライン２１，２
３に回転板２５，２７がスペーサリング３８を介
して小間隙で交互に対向し合う状態で係止されて
いる。即ち、複数の回転板２５，２７のうち回転
板２５は大径スリーブ５側に係止され、回転板２
７はハブ１１側にそれぞれ係止され、前者の回転
板２５は側板７、左側の出力W1と一体に回転す
る。また、後者の回転板２７は該ハブ１１の内周
に係止された右側の出力軸Ｗと一体に回転するよ
うになつている。そしてこれらの各回転板２５，
２７には前記シリコンオイル等の粘性流体が作用
している。 Splines 2 are provided on the inner circumference of the large-diameter sleeve 5 constituting the sealed chamber 3 and on the outer circumference of the hub 11, respectively.
1, 23 are applied, and the splines 21, 2
3, rotary plates 25 and 27 are locked with a spacer ring 38 in between so as to alternately face each other with a small gap between them. That is, among the plurality of rotary plates 25 and 27, the rotary plate 25 is locked to the large diameter sleeve 5 side, and the rotary plate 25 is locked to the large diameter sleeve 5 side.
7 are respectively locked on the hub 11 side, and the former rotating plate 25 rotates together with the side plate 7 and the output W 1 on the left side. Further, the latter rotating plate 27 is adapted to rotate together with the right output shaft W that is locked to the inner periphery of the hub 11. And each of these rotating plates 25,
A viscous fluid such as the silicone oil is acting on 27.
なお、密閉室３を構成する大径スリーブ５の外
周とデフケース１の内周面とに耐摩耗性を確保す
る表面処理を行なうことが望ましい。 Note that it is desirable that the outer periphery of the large-diameter sleeve 5 constituting the sealed chamber 3 and the inner periphery of the differential case 1 be subjected to surface treatment to ensure wear resistance.
一方、前記密閉室３の側板７にはギヤ部３１が
形成されていて、側板７は一方の差動大歯車とな
つている。即ち、ギヤ部３１にはデフケース１と
一緒に公転しながら自転可能な差動小歯車３３が
噛み合つている。 On the other hand, a gear portion 31 is formed on the side plate 7 of the sealed chamber 3, and the side plate 7 serves as one differential large gear. That is, a differential pinion 33 that can rotate while revolving together with the differential case 1 is meshed with the gear portion 31 .
差動小歯車３３はデフケース１に装架された小
歯車軸３５に回転自在に装着されると共に、該差
動小歯車３３には側板７と対向する位置に差動大
歯車３７が噛み合つている。 The differential pinion 33 is rotatably mounted on a pinion shaft 35 mounted on the differential case 1, and a large differential gear 37 is meshed with the differential pinion 33 at a position facing the side plate 7. There is.
なお、差動大歯車３７の軸孔には前記出力軸Ｗ
が貫通し該歯車３７とスプライン係合されてい
る。 Note that the output shaft W is provided in the shaft hole of the differential gear 37.
passes through and is spline engaged with the gear 37.
このように構成された差動制限装置にあつて
は、左右の出力軸W1，Ｗ、間に差動回転がない
場合、即ち、直進時には、デフケース１の駆動回
転は公転する差動小歯車３３より一方は差動大歯
車３７を経て一方の出力軸Ｗに、他方は、ギヤ部
３１、密封室３のつば付きスリーブ９を介して他
方の出力軸W1に同一速度でトルク伝達される。
次に、一方の出力軸側の車輪にスリツプ等が生じ
ると差動小歯車３３が自転するため各回転板２
５，２７は粘性流体の抵抗に抗して相対回転が発
生するが、この時、粘性流体による抵抗で、差動
制限作用が働き両出力軸W1，Ｗにトルクが伝達
される。 In the differential limiting device configured in this way, when there is no differential rotation between the left and right output shafts W 1 and W, that is, when traveling straight, the drive rotation of the differential case 1 is caused by the rotation of the differential pinion that revolves. 33, one side is transmitted to one output shaft W through the differential large gear 37, and the other side is transmitted to the other output shaft W1 through the gear portion 31 and the flange sleeve 9 of the sealed chamber 3 at the same speed. .
Next, if a slip or the like occurs in the wheel on one output shaft side, the differential pinion 33 rotates, so each rotating plate 2
5 and 27 undergo relative rotation against the resistance of the viscous fluid, and at this time, due to the resistance caused by the viscous fluid, a differential limiting action is activated and torque is transmitted to both output shafts W 1 and W.
この場合、密閉室３の外周壁となる大径スリー
ブ５は凹部１５によつて表面積が拡大されると共
に凹部１５内の潤滑油とによつて冷却され相対回
転時に発生する粘性流体の温度上昇が抑えられ
る。 In this case, the surface area of the large-diameter sleeve 5, which forms the outer peripheral wall of the sealed chamber 3, is expanded by the recess 15 and is cooled by the lubricating oil in the recess 15, thereby reducing the temperature rise of the viscous fluid that occurs during relative rotation. It can be suppressed.
次に、各回転板２５，２７の相対回転が継続す
ると粘性流体の温度がさらに上昇する。この場
合、冷却を上まわつて粘性流体温度が上昇すると
密閉室３内の内圧が高まる。この時、大径スリー
ブ５は凹部１５によつて剛性が低く抑えられてい
るため容易に膨脹し、弾性変形する。したがつて
ハウジング１０の外周壁は、弾性変形時にケース
１の内周壁１ａと接触する。従つて、回転するハ
ウジング１０に制動作用が働くようになり各回転
板２５，２７の相対回転が抑制される。この結
果、密閉室３内の内圧上昇が抑えられシール部材
等の破損は起きなくなる。 Next, as the relative rotation of the rotary plates 25 and 27 continues, the temperature of the viscous fluid further increases. In this case, when the temperature of the viscous fluid increases beyond the cooling, the internal pressure within the sealed chamber 3 increases. At this time, the large diameter sleeve 5 is easily expanded and elastically deformed because its rigidity is kept low by the recess 15. Therefore, the outer peripheral wall of the housing 10 comes into contact with the inner peripheral wall 1a of the case 1 during elastic deformation. Therefore, a braking action is applied to the rotating housing 10, and the relative rotation of the rotary plates 25 and 27 is suppressed. As a result, an increase in internal pressure within the sealed chamber 3 is suppressed, and damage to the sealing member, etc., does not occur.
なお、この実施例では粘性流体を封入した密閉
室をデフケース内に設けた差動制限装置に用いて
説明を行つたが、前輪と後輪を駆動するいわゆる
４輪駆動タイプにおいて前輪と後輪をつなぐプロ
ペラシヤフト等の伝達系の中間に設けた動力伝達
装置に適用することも可能である。 In this example, the sealed chamber filled with viscous fluid was used in the differential limiting device installed in the differential case, but in a so-called four-wheel drive type that drives the front and rear wheels, It is also possible to apply the present invention to a power transmission device provided in the middle of a transmission system such as a propeller shaft.
以上説明したように、この考案の動力伝達装置
によれば次のような効果を奏する。
As explained above, the power transmission device of this invention provides the following effects.
(1) 凹部によつてハウジングの外周壁の剛性を低
く抑えることができるため内圧上昇時の弾性変
形の立上りが迅速となり、ケースの内周壁と迅
速に圧接され回転板の相対回転がなくなり内圧
上昇が抑えられてシール部材等の破損が防止で
きる。(1) Since the rigidity of the outer peripheral wall of the housing can be kept low by the recess, the rise of elastic deformation when the internal pressure rises is quick, and the inner peripheral wall of the case is quickly pressed against the inner peripheral wall of the case, eliminating the relative rotation of the rotating plate and increasing the internal pressure. This prevents damage to the sealing member, etc.
(2) 複数の周溝によつて表面積が拡大され冷却効
率がよくなり粘性流体の温度上昇を抑えること
ができる。(2) The multiple circumferential grooves expand the surface area, improve cooling efficiency, and suppress the temperature rise of the viscous fluid.
(3) 凹部によつてハウジング外周壁の摩擦係数が
上昇し、迅速な制動作用を得ることができる。(3) The recess increases the friction coefficient of the outer peripheral wall of the housing, allowing for quick braking action.
第１図はこの考案の実施例に係るデフアレンシ
ヤル装置の断面図、第２図は要部の拡大断面図で
ある。
主要な図面符号の説明、１……ケース、３……
密閉室、１０……ハウジング、１５……凹部、２
５，２７……回転板、Ｗ，W1……出力軸（伝達
軸）。
FIG. 1 is a sectional view of a differential device according to an embodiment of this invention, and FIG. 2 is an enlarged sectional view of the main parts. Explanation of main drawing symbols, 1...Case, 3...
Sealed chamber, 10...housing, 15...recess, 2
5, 27... Rotating plate, W, W 1 ... Output shaft (transmission shaft).
Claims (1)
外周壁が近接して対向したハウジングと、このハ
ウジング内に粘性流体が充填された密閉室と、こ
の密閉室内に前記ハウジングを介して一方の伝達
軸側に係合する回転板と、該回転板と対向し他方
の伝達軸側に係合する回転板と、前記密閉室の内
圧上昇時に前記近接して対向したハウジング外周
壁がケース内周壁に接触するようにハウジング周
壁を部分的に薄くする複数の凹部とを有すること
を特徴とする動力伝達装置。 A housing that is rotatably supported within a case and has an outer circumferential wall facing the inner circumferential wall of the case, and a sealed chamber filled with viscous fluid; A rotary plate that engages with the shaft side, a rotary plate that faces the rotary plate and engages with the other transmission shaft side, and when the internal pressure of the sealed chamber increases, the housing outer circumferential wall that is closely opposed to the inner circumferential wall of the case. A power transmission device comprising a plurality of recesses that partially thin a housing peripheral wall so as to contact each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986043126U JPH0342261Y2 (en) | 1986-03-26 | 1986-03-26 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986043126U JPH0342261Y2 (en) | 1986-03-26 | 1986-03-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62155234U JPS62155234U (en) | 1987-10-02 |
| JPH0342261Y2 true JPH0342261Y2 (en) | 1991-09-04 |
Family
ID=30859692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986043126U Expired JPH0342261Y2 (en) | 1986-03-26 | 1986-03-26 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0342261Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3421797A1 (en) * | 1983-06-01 | 1985-01-03 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Viscous coupling for transfer gear box |
-
1986
- 1986-03-26 JP JP1986043126U patent/JPH0342261Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3421797A1 (en) * | 1983-06-01 | 1985-01-03 | Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen | Viscous coupling for transfer gear box |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62155234U (en) | 1987-10-02 |
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