JPH04244638A - Diff-lock mechanism for differential gear - Google Patents

Diff-lock mechanism for differential gear

Info

Publication number
JPH04244638A
JPH04244638A JP925891A JP925891A JPH04244638A JP H04244638 A JPH04244638 A JP H04244638A JP 925891 A JP925891 A JP 925891A JP 925891 A JP925891 A JP 925891A JP H04244638 A JPH04244638 A JP H04244638A
Authority
JP
Japan
Prior art keywords
differential
case
hydraulic clutch
differential case
diff
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.)
Pending
Application number
JP925891A
Other languages
Japanese (ja)
Inventor
Tomeo Umemoto
留男 梅本
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.)
Kubota Corp
Original Assignee
Kubota 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 Kubota Corp filed Critical Kubota Corp
Priority to JP925891A priority Critical patent/JPH04244638A/en
Publication of JPH04244638A publication Critical patent/JPH04244638A/en
Pending legal-status Critical Current

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  • Motor Power Transmission Devices (AREA)
  • Retarders (AREA)

Abstract

PURPOSE:To hydraulically execute diff-lock operation, to compactly accommodate a hydraulic clutch in a diff-case, and to simply supply a pressure oil to the hydraulic clutch by forming a cliff-lock mechanism for changing over a cliff-side gear on one side and the diff-case between them from a relatively rotating state to an unitedly rotating state of the hydraulic clutch. CONSTITUTION:An annular recess U opened toward a divided face is formed in a left divided cliff-case 6L, and a hydraulic clutch 12 is arranged in the recess U, and the driving member 28 of the hydraulic clutch 12 is provided in the left divided diff-case 6L and its driven member 29 is provided on the left diff-side gear 8L. Oil pathes 13A, 13B for supplying a pressure oil to the hydraulic clutch 12 are separately provided in the left divided cliff-case 6L and a bearing body 4L to support the diff-case 6L, and the hydraulic clutch 12 functions to change over the diff-case 6 and the left diff-side gear 8L into an unitedly rotating state.

Description

【発明の詳細な説明】[Detailed description of the invention]

【0001】0001

【産業上の利用分野】本発明は、例えばトラクタ等の作
業機装着型走行車両に利用される差動装置のデフロック
機構に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a differential lock mechanism for a differential gear used in a working vehicle such as a tractor.

【0002】0002

【従来の技術】トラクタ等では、作業機の直進性及び操
作性を良くするために、後輪差動装置及び/又は前輪差
動装置にデフロック機構が設けられている。従来のデフ
ロック機構には、デフケースに外側から貫通してデフサ
イドギヤに係合するピン部材をシフタに取り付けておき
、このシフタをペダル軸の回動でカムを介してシフトす
るものと、シフタを出力軸にスプライン嵌合し、このシ
フタとデフケースとの間にドッグクラッチを設けたもの
とがある。
2. Description of the Related Art In tractors and the like, a differential lock mechanism is provided in a rear wheel differential device and/or a front wheel differential device in order to improve the straightness and operability of the working machine. Conventional differential lock mechanisms include those in which a pin member that penetrates the differential case from the outside and engages with the differential side gear is attached to the shifter, and the shifter is shifted via a cam by rotation of the pedal shaft; There is one that is spline-fitted to the shaft and has a dog clutch between the shifter and the differential case.

【0003】0003

【発明が解決しようとする課題】前記従来技術では、デ
フロックをペダルの足踏み操作で行わなければならず、
デフロックが長時間に及ぶと足が疲れ、ブレーキペダル
、アクセルペダル等の操作がし難くなり、作業性及び操
作性が良いとは言い難いものである。本発明は、一方の
デフサイドギヤとデフケースとの間に、両者を相対回転
状態から一体回転状態に切り換える油圧クラッチを設け
て、油圧でデフロック操作ができ、この油圧クラッチを
デフケース内にコンパクトに収めることができ、しかも
油圧クラッチへの圧油供給が簡単にできるようにした差
動装置のデフロック機構を提供することを目的とする。
[Problems to be Solved by the Invention] In the above-mentioned prior art, the differential lock must be performed by stepping on the pedal.
If the differential lock is left on for a long time, the legs become tired and it becomes difficult to operate the brake pedal, accelerator pedal, etc., and it is difficult to say that the workability and operability are good. The present invention provides a hydraulic clutch between one differential side gear and the differential case to switch the two from a relative rotation state to an integral rotation state, so that differential lock operation can be performed using hydraulic pressure, and this hydraulic clutch can be compactly housed within the differential case. To provide a differential lock mechanism for a differential device which allows easy supply of pressure oil to a hydraulic clutch.

【0004】0004

【課題を解決するための手段】本発明における課題解決
のための具体的手段は、左右軸受体に軸受を介して左右
分割可能なデフケースを回転自在に支持し、このデフケ
ースの回転軸心に左右出力軸を貫通し、デフケース内に
各出力軸に固定の左右デフサイドギヤを相対回転自在に
支持すると共に左右デフサイドギヤと噛合する少なくと
も一対のデフピニオンを配置し、一方の分割デフケース
の外周にベベルギヤを設け、一方の出力軸とデフケース
との間に両者を相対回転状態から一体回転状態に切り換
えるデフロック機構を設けた差動装置において、他方の
分割デフケース内に分割面側に開放した環状の凹所を形
成し、この凹所内に油圧クラッチを配置し、この油圧ク
ラッチの駆動部材を他方の分割デフケースに、從動部材
をデフサイドギヤにそれぞれ設け、油圧クラッチへ圧油
を供給する油路を他方の分割デフケースとこれを支持す
る軸受体とに形成したことである。
[Means for Solving the Problems] A specific means for solving the problems of the present invention is to rotatably support a differential case that can be divided into left and right parts through bearings in the left and right bearing bodies, and to rotate the left and right parts of the differential case about the rotation axis of the differential case. The left and right differential side gears fixed to each output shaft are supported relatively rotatably in the differential case, passing through the output shaft, and at least one pair of differential pinions are arranged to mesh with the left and right differential side gears, and a bevel gear is provided on the outer periphery of one of the divided differential cases. In a differential gear equipped with a differential lock mechanism between one output shaft and a differential case that switches the two from a relative rotation state to an integral rotation state, an annular recess that is open to the split surface side is formed in the other split differential case. A hydraulic clutch is arranged in this recess, a driving member of this hydraulic clutch is provided in the other divided differential case, a driving member is provided in the differential side gear, and an oil passage for supplying pressure oil to the hydraulic clutch is provided in the other divided differential case. and a bearing body that supports it.

【0005】[0005]

【作用】左軸受体4Lに接続されたパイプ31を介して
外部から油路13A、13Bに圧油を供給すると、この
圧油で油圧クラッチ12が作動し、デフケース6とデフ
サイドギヤ8とが連結されて、デフケース6と出力軸7
とが相対回転状態から一体回転状態に切り換えられ、ベ
ベルギヤ11、デフケース6及び左右出力軸7が一体回
転するデフロック状態になる。左分割デフケース6L内
に分割面側に開放して形成した環状凹所Uは油圧クラッ
チ12をコンパクトに収納している。
[Operation] When pressure oil is supplied from the outside to the oil passages 13A and 13B via the pipe 31 connected to the left bearing body 4L, the hydraulic clutch 12 is actuated by this pressure oil, and the differential case 6 and the differential side gear 8 are connected. and the differential case 6 and output shaft 7
are switched from a relative rotation state to an integral rotation state, and a differential lock state is entered in which the bevel gear 11, the differential case 6, and the left and right output shafts 7 rotate integrally. An annular recess U formed in the left divided differential case 6L and open to the dividing surface side accommodates the hydraulic clutch 12 in a compact manner.

【0006】[0006]

【実施例】以下、本発明の実施例を図面に基ずいて説明
する。図1、2において、20はトラクタのミッション
ケースで、その内部に後車輪にエンジン動力を伝達する
ための差動装置1が収納されている。差動装置1はミッ
ションケース20の左右側壁に取り付けられた左右軸受
体4L,4Rに、軸受5L,5Rを介してデフケース6
が回転自在に支持されている。このデフケース6には回
転軸心に左右出力軸7L,7Rが貫通しており、各出力
軸7L,7Rはブレーキ装置のブレーキ軸であり、終減
速装置を介して後車軸に動力伝達可能である。
DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, reference numeral 20 denotes a transmission case of a tractor, and a differential device 1 for transmitting engine power to rear wheels is housed inside the transmission case. The differential gear 1 is connected to the left and right bearing bodies 4L, 4R attached to the left and right side walls of the mission case 20 via bearings 5L, 5R to the differential case 6.
is rotatably supported. Left and right output shafts 7L, 7R pass through the differential case 6 at the rotation axis, and each output shaft 7L, 7R is a brake shaft of a brake device, and can transmit power to the rear axle via a final reduction device. .

【0007】前記デフケース6内には各出力軸7L,7
Rにスプライン嵌合した左右デフサイドギヤ8L,8R
と、左右デフサイドギヤ8L,8Rに噛合している少な
くとも一対のデフピニオン10とが配置されている。9
は出力軸7と直交状にデフケース6に貫通支持されたデ
フピニオン軸9で、実施例では十字状に2本設けられ、
各デフピニオン軸9に一対のデフピニオン10が回転自
在に支持されている。また、デフケース6の外周にはベ
ベルギヤ11が取り付けられている。
Inside the differential case 6 are output shafts 7L, 7.
Left and right differential side gears 8L and 8R spline-fitted to R
and at least one pair of differential pinions 10 meshing with the left and right differential side gears 8L, 8R. 9
is a differential pinion shaft 9 which is supported through the differential case 6 perpendicularly to the output shaft 7; in the embodiment, two shafts are provided in a cross shape;
A pair of differential pinions 10 are rotatably supported on each differential pinion shaft 9. Further, a bevel gear 11 is attached to the outer periphery of the differential case 6.

【0008】デフケース6は左右2個の分割デフケース
6L,6Rに分割されている。右分割デフケース6Rは
本体ケースとなっていて、右デフサイドギヤ8Rを相対
回転自在に支持し、デフピニオン軸9を取り付け、ベベ
ルギヤ11をボルト22を介して取り付ける取り付け部
21を形成している。左分割デフケース6Lはケースカ
バーとなっていて、ボルト23を介して右分割デフケー
ス6Rに対して固定されている。
The differential case 6 is divided into two left and right divided differential cases 6L and 6R. The right divided differential case 6R is a main body case, supports the right differential side gear 8R relatively rotatably, has a differential pinion shaft 9 attached thereto, and forms an attachment part 21 to which the bevel gear 11 is attached via bolts 22. The left differential case 6L serves as a case cover, and is fixed to the right differential case 6R via bolts 23.

【0009】前記左分割デフケース6Lの内周には、分
割面側に開放された環状の凹所Uが形成されており、こ
の凹所Uには油圧クラッチ12が配置され、デフケース
6及び左デフサイドギヤ8Lと共にデフロック機構2を
構成している。油圧クラッチ12は、左分割デフケース
6Lに形成された環状シリンダ24に配置されたピスト
ン25と、デフケース6に出力軸7軸方向移動可能に且
つ回り止めされたプレッシャープレート28と、左デフ
サイドギヤ8Lにスプライン嵌合したクラッチプレート
29と、受け板27を有しており、前記プレッシャープ
レート28は油圧クラッチ12の駆動部材、クラッチプ
レート29は從動部材となっている。
An annular recess U that is open to the dividing surface side is formed in the inner periphery of the left divided differential case 6L, and a hydraulic clutch 12 is disposed in this recess U, and the left differential case 6 and the left differential It constitutes the differential lock mechanism 2 together with the side gear 8L. The hydraulic clutch 12 includes a piston 25 disposed in an annular cylinder 24 formed in the left divided differential case 6L, a pressure plate 28 that is movable in the axial direction of the output shaft 7 in the differential case 6 and is prevented from rotating, and a left differential side gear 8L. It has a spline-fitted clutch plate 29 and a receiving plate 27, the pressure plate 28 serving as a driving member for the hydraulic clutch 12, and the clutch plate 29 serving as a sliding member.

【0010】前記シリンダ24内に圧油を供給すること
により、ピストン25が受け板27との間でプレッシャ
ープレート28とクラッチプレート29とを挟み、デフ
ケース6と左デフサイドギヤ8Lとを連結し、デフケー
ス6と出力軸7とを相対回転状態から一体回転状態(デ
フロック状態)に切り換える。左分割デフケース6Lは
その内周に凹所Uを形成して、デフケース6の外形が余
り大きくならないようにしており、これによりデフケー
ス6内に油圧クラッチ12をコンパクトに収めている。
By supplying pressure oil into the cylinder 24, the piston 25 sandwiches the pressure plate 28 and clutch plate 29 with the receiving plate 27, connects the differential case 6 and the left differential side gear 8L, and connects the differential case 6 to the left differential side gear 8L. 6 and the output shaft 7 are switched from a relative rotation state to an integral rotation state (differential lock state). The left divided differential case 6L has a recess U formed on its inner periphery to prevent the outer shape of the differential case 6 from becoming too large, thereby allowing the hydraulic clutch 12 to be housed within the differential case 6 in a compact manner.

【0011】左分割デフケース6Lの左外側部は軸受体
4L内部にまで突出しており、シリンダ24からこの突
出部分まで油路13Aが形成され、その外周に周溝30
が形成され、また左軸受体4Lには周溝30と連通する
油路13Bが形成されている。油路13Bには電磁切り
換え弁に連通するパイプ31が接続されている。油圧ク
ラッチ12への圧油供給は、電磁切り換え弁を介してお
こなわれる。
The left outer part of the left divided differential case 6L protrudes into the inside of the bearing body 4L, and an oil passage 13A is formed from the cylinder 24 to this protruding part, and a circumferential groove 30 is formed on the outer periphery of the oil passage 13A.
An oil passage 13B communicating with the circumferential groove 30 is formed in the left bearing body 4L. A pipe 31 communicating with the electromagnetic switching valve is connected to the oil passage 13B. Pressure oil is supplied to the hydraulic clutch 12 via an electromagnetic switching valve.

【0012】尚、本発明は前記実施例に限定されるもの
ではなく、種種変形することができる。例えば、差動装
置1は左右を逆にしたり、デフケース6に凹所U側に突
出するプレッシャプレート28用回り止め突起を設けた
る代わりにピンを設けたりしてもよい。また、本発明は
前輪用差動装置にもそのまま利用できる。前記ベベルギ
ヤ11はまがりばかさ歯車であり、使用時間の長い前進
方向回転で図1左方向にスラスト力が働くように、ネジ
レ方向が設定されている。これにより、取り付け部21
はデフケース6の右側面に環状凹み形状として形成でき
、デフケース6を小型にすることが可能になる。
It should be noted that the present invention is not limited to the embodiments described above, and can be modified in various ways. For example, the left and right sides of the differential device 1 may be reversed, or a pin may be provided on the differential case 6 instead of the anti-rotation protrusion for the pressure plate 28 protruding toward the recess U side. Further, the present invention can be used as is for a front wheel differential device. The bevel gear 11 is a spiral bevel gear, and its twisting direction is set so that a thrust force is exerted to the left in FIG. 1 when it is rotated in the forward direction during a long period of use. As a result, the attachment part 21
can be formed as an annular concave shape on the right side surface of the differential case 6, making it possible to downsize the differential case 6.

【0013】即ち、従来は図2に示すように、ベベルギ
ヤは前進方向回転で図1右方向にスラスト力が働くよう
に、ネジレ方向が設定されているため、ベベルギヤ11
より右側にデフケース6からフランジ33を突出してお
かなければならなく、デフケース6が大型になっていた
。これをネジレ方向を逆にすることにより、ベベルギヤ
11のスラスト力作用方向を逆にして、デフケース6の
フランジ33を削除し且つ外周の不要な部分を切り欠い
て、そこにベベルギヤ11を配置できるようになる。
That is, conventionally, as shown in FIG. 2, the torsional direction of the bevel gear is set so that a thrust force is exerted in the right direction in FIG. 1 when the bevel gear rotates in the forward direction.
The flange 33 had to protrude from the differential case 6 on the right side, making the differential case 6 large. By reversing the twist direction, the thrust force acting direction of the bevel gear 11 can be reversed, the flange 33 of the differential case 6 can be removed, and an unnecessary part of the outer periphery can be cut out, and the bevel gear 11 can be placed there. become.

【0014】[0014]

【発明の効果】以上詳述した本発明によれば、他方の分
割デフケース内に分割面側に開放した環状の凹所を形成
し、この凹所内に油圧クラッチを配置し、この油圧クラ
ッチの駆動部材を他方の分割デフケースに、從動部材を
デフサイドギヤにそれぞれ設け、油圧クラッチへ圧油を
供給する油路を他方の分割デフケースとこれを支持する
軸受体とに形成しているので、油圧で油圧クラッチを操
作するだけでデフロック操作ができ、作業性及び操作性
が向上し、この油圧クラッチをデフケース内にコンパク
トに収めることができ、しかも、油圧クラッチへの圧油
供給を簡単な構成でできる。
According to the present invention described in detail above, an annular recess opened to the dividing surface side is formed in the other divided differential case, a hydraulic clutch is disposed within this recess, and the hydraulic clutch is driven. The components are provided in the other split differential case, the driving member is provided in the differential side gear, and the oil passage for supplying pressure oil to the hydraulic clutch is formed in the other split differential case and the bearing body that supports it, so that hydraulic The differential lock can be operated simply by operating the hydraulic clutch, improving workability and operability. This hydraulic clutch can be compactly housed within the differential case, and pressure oil can be supplied to the hydraulic clutch with a simple configuration. .

【図面の簡単な説明】[Brief explanation of the drawing]

【図1】差動装置の縦断面図である。FIG. 1 is a longitudinal cross-sectional view of a differential gear.

【図2】従来のベベルギヤ取り付け構造を示す断面図で
ある。
FIG. 2 is a sectional view showing a conventional bevel gear mounting structure.

【符号の説明】[Explanation of symbols]

1  差動装置 2  デフロック機構 4  軸受体 5  軸受 6  デフケース 7  出力軸 8  デフサイドギヤ 9  デフピニオン軸 10  デフピニオン 11  ベベルギヤ 12  油圧クラッチ 13  油路 28  プレッシャプレート(駆動部材)29  クラ
ッチプレート(駆動部材)U    凹所
1 Differential device 2 Differential lock mechanism 4 Bearing body 5 Bearing 6 Differential case 7 Output shaft 8 Differential side gear 9 Differential pinion shaft 10 Differential pinion 11 Bevel gear 12 Hydraulic clutch 13 Oil passage 28 Pressure plate (driving member) 29 Clutch plate (driving member) U Recess

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】  左右軸受体に軸受を介して左右分割可
能なデフケースを回転自在に支持し、このデフケースの
回転軸心に左右出力軸を貫通し、デフケース内に各出力
軸に固定の左右デフサイドギヤを相対回転自在に支持す
ると共に左右デフサイドギヤと噛合する少なくとも一対
のデフピニオンを配置し、一方の分割デフケースの外周
にベベルギヤを設け、一方の出力軸とデフケースとの間
に両者を相対回転状態から一体回転状態に切り換えるデ
フロック機構を設けた差動装置において、他方の分割デ
フケース内に分割面側に開放した環状の凹所を形成し、
この凹所内に油圧クラッチを配置し、この油圧クラッチ
の駆動部材を他方の分割デフケースに、從動部材をデフ
サイドギヤにそれぞれ設け、油圧クラッチへ圧油を供給
する油路を他方の分割デフケースとこれを支持する軸受
体とに形成したことを特徴とする差動装置のデフロック
機構。
Claim 1: A differential case that can be divided into left and right parts is rotatably supported on the left and right bearing bodies via bearings, and left and right output shafts pass through the rotation axis of the differential case, and left and right differentials fixed to each output shaft are provided in the differential case. At least a pair of differential pinions are arranged to support the side gears so that they can rotate relative to each other and mesh with the left and right differential side gears, and a bevel gear is provided on the outer periphery of one of the divided differential cases, and between one output shaft and the differential case, the two are kept from a relative rotation state. In a differential gear equipped with a differential lock mechanism that switches to an integrally rotating state, an annular recess that is open to the dividing surface side is formed in the other divided differential case,
A hydraulic clutch is arranged in this recess, a driving member of this hydraulic clutch is provided in the other divided differential case, a driving member is provided in the differential side gear, and an oil passage for supplying pressure oil to the hydraulic clutch is connected to the other divided differential case. A differential lock mechanism for a differential device, characterized in that the differential lock mechanism is formed in a bearing body that supports the.
JP925891A 1991-01-29 1991-01-29 Diff-lock mechanism for differential gear Pending JPH04244638A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP925891A JPH04244638A (en) 1991-01-29 1991-01-29 Diff-lock mechanism for differential gear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP925891A JPH04244638A (en) 1991-01-29 1991-01-29 Diff-lock mechanism for differential gear

Publications (1)

Publication Number Publication Date
JPH04244638A true JPH04244638A (en) 1992-09-01

Family

ID=11715399

Family Applications (1)

Application Number Title Priority Date Filing Date
JP925891A Pending JPH04244638A (en) 1991-01-29 1991-01-29 Diff-lock mechanism for differential gear

Country Status (1)

Country Link
JP (1) JPH04244638A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007509288A (en) * 2003-10-20 2007-04-12 ゲー カー エヌ ドライブライン インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング Differential shaft cross for differential gear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007509288A (en) * 2003-10-20 2007-04-12 ゲー カー エヌ ドライブライン インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング Differential shaft cross for differential gear

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