JPH04244640A - Diff-lock mechanism for differential gear - Google Patents
Diff-lock mechanism for differential gearInfo
- Publication number
- JPH04244640A JPH04244640A JP926091A JP926091A JPH04244640A JP H04244640 A JPH04244640 A JP H04244640A JP 926091 A JP926091 A JP 926091A JP 926091 A JP926091 A JP 926091A JP H04244640 A JPH04244640 A JP H04244640A
- Authority
- JP
- Japan
- Prior art keywords
- differential
- diff
- case
- hydraulic clutch
- divided
- 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
Links
- 230000007246 mechanism Effects 0.000 title claims abstract description 14
- 230000002093 peripheral effect Effects 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Landscapes
- Motor Power Transmission Devices (AREA)
- Retarders (AREA)
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
Abstract
Description
【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、しかもこの油圧クラ
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. It is an object of the present invention to provide a differential lock mechanism for a differential gear that can perform the following functions.
【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、前記一
方の分割デフケースのベベルギヤ取り付け部の内周側に
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
一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 device that is provided with a differential lock mechanism between one output shaft and a differential case to switch the two from a relative rotation state to an integral rotation state, on the inner circumference side of the bevel gear attachment part of the one split differential case, on the split surface side. An open annular recess is formed, a hydraulic clutch is disposed within this recess, the driving member of the hydraulic clutch is provided in one of the divided differential cases, and the driving member is provided in the differential side gear.
【０００５】[0005]
【作用】圧油を供給して油圧クラッチ１２を作動させる
と、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。
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 and the hydraulic clutch 12 is operated, the differential case 6 and the differential side gear 8 are connected.
The differential case 6 and the 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 together. An annular recess U formed in the split differential case 6L and open to the split 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、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
A differential pinion shaft 9 is supported through the differential case 6 so as to be orthogonal to the output shaft 7, and a pair of differential pinions 10 are rotatably supported. 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。左分割デフケース６Ｌは
本体ケースとなっていて、左デフサイドギヤ８Ｌ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の取り付け部２１を形成している。右分割デ
フケース６Ｒはケースカバーとなっていて、右デフサイ
ドギヤ８Ｒを相対回転自在に支持し、ベベルギヤ１１と
共にボルト２２を介して左分割デフケース６Ｌ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 left divided differential case 6L is a main body case, supports the left differential side gear 8L in a relatively rotatable manner, has the differential pinion shaft 9 attached thereto, and forms a mounting portion 21 for the bevel gear 11. The right divided differential case 6R serves as a case cover, supports the right differential side gear 8R relatively rotatably, and is fixed to the left divided differential case 6L together with the bevel gear 11 via bolts 22.
【０００９】前記左分割デフケース６Ｌのベベルギヤ取
り付け部２１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及びデフサイドギヤ８Ｒ
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にピ
ン２６を介して回り止めされた押圧板２７及びプレッシ
ャープレート２８と、右デフサイドギヤ８Ｒにスプライ
ン嵌合したクラッチプレート２９とを有しており、前記
押圧板２７とプレッシャープレート２８とは油圧クラッ
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。尚、押圧板２７はピストン２５と一体成形
しても良い。An annular recess U that is open to the dividing surface side is formed on the inner periphery of the bevel gear mounting portion 21 of the left divided differential case 6L, and a hydraulic clutch 12 is disposed in this recess U. Differential case 6 and differential side gear 8R
Together, they constitute a differential lock mechanism 2. The hydraulic clutch 12 includes a piston 25 disposed in an annular cylinder 24 formed in the left differential case 6L, a pressure plate 27 and a pressure plate 28 that are fixed to the differential case 6 via a pin 26, and a right differential side gear 8R. The clutch plate 29 is spline-fitted, and the pressing plate 27 and pressure plate 28 serve as driving members for the hydraulic clutch 12, and the clutch plate 29 serves as a sliding member. Note that the pressing plate 27 may be integrally molded with the piston 25.
【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が押圧板２７を押圧して、右分割
デフケース６Ｒ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と右デフサ
イドギヤ８Ｒ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。By supplying pressure oil into the cylinder 24, the piston 25 presses the pressure plate 27, sandwiching the pressure plate 28 and clutch plate 29 between the right divided differential case 6R and the right differential case 6. The differential side gear 8R is connected, and the differential case 6 and output shaft 7 are switched from a relative rotation state to an integral rotation state (differential lock state).
【００１１】左分割デフケース６Ｌの取り付け部２１は
ベベルギヤ１１側に膨出するように段付き状に形成され
ていて、その内周に凹所Ｕを形成しても、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。左分割デフケース６Ｌには油路１３Ａと周溝
３０とが形成され、左軸受体４Ｌには油路１３Ｂが形成
され、油圧クラッチ１２への圧油供給は、電磁切り換え
弁３３を介しておこなわれる。図２において、３４は油
圧ポンプ、３５はステアリングコントローラ、３６はＰ
ＴＯクラッチ、３７は前輪倍速切り換えクラッチ、３８
は前後進切り換えクラッチ、３９はラインフイルタ、４
０はオイルクーラをそれぞれ示しており、油圧クラッチ
１２はステアリングコントローラ３５と直列に接続され
、ＰＴＯクラッチ３６、前輪倍速切り換えクラッチ３７
及び前後進切り換えクラッチ３８と並列に接続されてい
る。前記前輪倍速切り換えクラッチ３７と前後進切り換
えクラッチ３８と油圧クラッチ１２とにはそれそれ絞り
弁５２が設けられている。The mounting portion 21 of the left divided differential case 6L is formed in a stepped shape so as to bulge toward the bevel gear 11 side.
The outer shape of the hydraulic clutch 12 is not too large, and thus the hydraulic clutch 12 is housed compactly within the differential case 6. An oil passage 13A and a circumferential groove 30 are formed in the left divided differential case 6L, an oil passage 13B is formed in the left bearing body 4L, and pressure oil is supplied to the hydraulic clutch 12 via an electromagnetic switching valve 33. . In FIG. 2, 34 is a hydraulic pump, 35 is a steering controller, and 36 is a P
TO clutch, 37 is front wheel double speed switching clutch, 38
is a forward/reverse switching clutch, 39 is a line filter, 4
0 indicates an oil cooler, the hydraulic clutch 12 is connected in series with the steering controller 35, the PTO clutch 36, and the front wheel double speed switching clutch 37.
and the forward/reverse switching clutch 38 are connected in parallel. The front wheel double speed switching clutch 37, the forward/reverse switching clutch 38, and the hydraulic clutch 12 are each provided with a throttle valve 52.
【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、ピン２６を設ける代わりにデ
フケース６に凹所Ｕ側に突出する回り止め突起を設けた
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。図３はトラクタの走行系メインクラッ
チ４３の油圧式クラッチ操作機構４４の１例を示してい
る。４５はミッションケースに固定の支持壁で、その円
筒部に外嵌したシリンダ筒４６との間にシリンダ室４７
が形成され、このシリンダ室４７に環状ピストン４８が
挿入されている。前記ピストン４８は前部径内側の支持
部４８ａでレリーズベアリング４９を支持しており、そ
の支持部４８ａは走行系推進軸５０上に軸方向摺動自在
に支持されている。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 instead of providing the pin 26, the differential case 6 may be provided with a rotation preventing protrusion that protrudes toward the recess U side. Further, the present invention can be used as is for a front wheel differential device. FIG. 3 shows an example of a hydraulic clutch operating mechanism 44 of a main clutch 43 of a tractor's traveling system. Reference numeral 45 denotes a support wall fixed to the mission case, and a cylinder chamber 47 is formed between the support wall 45 and the cylinder tube 46 fitted externally to the cylindrical portion of the support wall.
is formed, and an annular piston 48 is inserted into this cylinder chamber 47. The piston 48 supports a release bearing 49 with a support portion 48a on the radially inner side of the front portion, and the support portion 48a is supported on a traveling system propulsion shaft 50 so as to be freely slidable in the axial direction.
【００１３】前記支持部４８ａは従来、推進軸５０に直
接支持されており、鉄同士の接触のために隙間があり、
ピストン４８は繰り返しの操作によって倒れて、偏磨耗
したりねじれたりすることがあり、油洩れの原因になっ
ているが、図３に示すように、支持部４８ａと推進軸５
０との間にブッシュ５１を介在することにより、前記問
題点を解消できる。Conventionally, the support portion 48a is directly supported by the propulsion shaft 50, and there is a gap due to the contact between the iron parts.
The piston 48 may fall down due to repeated operations, become unevenly worn, or be twisted, causing oil leakage, but as shown in FIG.
The above problem can be solved by interposing the bush 51 between the bush 51 and the bush 51.
【００１４】[0014]
【発明の効果】以上詳述した本発明によれば、一方の分
割デフケースのベベルギヤ取り付け部の内周側に分割面
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一方の
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、
しかもこの油圧クラッチをデフケース内にコンパクトに
収めることができる。According to the present invention described in detail above, an annular recess that is open to the dividing surface side is formed on the inner circumferential side of the bevel gear mounting portion of one divided differential case, and a hydraulic clutch is disposed within this recess. However, since the driving member of this hydraulic clutch is provided on one of the split differential cases, and the driving member is provided on the differential side gear, the differential lock can be operated simply by operating the hydraulic clutch using hydraulic pressure, improving workability and operability. ,
Furthermore, this hydraulic clutch can be compactly housed within the differential case.
【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】油圧式デフロック機構を組み込んだ油圧回路図
である。FIG. 2 is a hydraulic circuit diagram incorporating a hydraulic differential lock mechanism.
【図３】メインクラッチ操作機構の１例を示す断面図で
ある。FIG. 3 is a sectional view showing an example of a main clutch operating mechanism.
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
１１ ベベルギヤ
１２ 油圧クラッチ
１３ 油路
２７ 押圧板（駆動部材）
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 11 Bevel gear 12 Hydraulic clutch 13 Oil passage 27 Press plate (drive member) 28 Pressure plate (drive member) 29 Clutch plate (drive Component) U recess
Claims (1)
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、前記一方の分
割デフケースのベベルギヤ取り付け部の内周側に分割面
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一方の
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 on the inner circumferential side of the bevel gear mounting portion of one of the divided differential cases, and a hydraulic clutch is installed in this recess. A differential lock mechanism for a differential gear, characterized in that the driving member of the hydraulic clutch is provided in one of the divided differential cases, and the driving member is provided in the differential side gear.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP926091A JPH04244640A (en) | 1991-01-29 | 1991-01-29 | Diff-lock mechanism for differential gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP926091A JPH04244640A (en) | 1991-01-29 | 1991-01-29 | Diff-lock mechanism for differential gear |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04244640A true JPH04244640A (en) | 1992-09-01 |
Family
ID=11715460
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP926091A Pending JPH04244640A (en) | 1991-01-29 | 1991-01-29 | Diff-lock mechanism for differential gear |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04244640A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01250671A (en) * | 1988-03-31 | 1989-10-05 | Hino Motors Ltd | Lubricating device for differential limitting device |
-
1991
- 1991-01-29 JP JP926091A patent/JPH04244640A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01250671A (en) * | 1988-03-31 | 1989-10-05 | Hino Motors Ltd | Lubricating device for differential limitting device |
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