JP3564716B2 - Tractor differential device - Google Patents

Tractor differential device Download PDF

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Publication number
JP3564716B2
JP3564716B2 JP02448494A JP2448494A JP3564716B2 JP 3564716 B2 JP3564716 B2 JP 3564716B2 JP 02448494 A JP02448494 A JP 02448494A JP 2448494 A JP2448494 A JP 2448494A JP 3564716 B2 JP3564716 B2 JP 3564716B2
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JP
Japan
Prior art keywords
differential
shaft
case
bevel gear
supported
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 - Fee Related
Application number
JP02448494A
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Japanese (ja)
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JPH07232505A (en
Inventor
康弘 宮内
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.)
Iseki and Co Ltd
Original Assignee
Iseki and Co Ltd
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 Iseki and Co Ltd filed Critical Iseki and Co Ltd
Priority to JP02448494A priority Critical patent/JP3564716B2/en
Publication of JPH07232505A publication Critical patent/JPH07232505A/en
Application granted granted Critical
Publication of JP3564716B2 publication Critical patent/JP3564716B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【0001】
【産業上の利用分野】
この発明は、トラクタのデフ装置に関する。左右の車輪間隔設定の自由度を高めるものである。
【0002】
【従来の技術、および発明が解決しようとする課題】
デフ装置が、筒状のアクスルハウジングの内部に収容された構成は知られているが、このデフケ−スのデフギヤから連動される左右一対のデフ軸は、噛合爪等を介してアクスルハウジング内の車輪連動軸へ連結するため、構成が煩雑で、左右の車輪間隔(トレッド)の異なる構成とする場合は、このトレッドに応じた独自の長さの連動軸を用意しなければならない。
【0003】
【課題を解決するための手段】
この発明は、筒状のアクスルハウジング1の左右両側にスペーサ35を介してファイナルケース23を取り付け、このファイナルケース23に対して車輪15を軸支する操向ケース24を操向回動可能に支持したトラクタにおいて、前記アクスルハウジング1内の左右方向中央部にデフギヤ2を内装しているデフケース3を収容させ、このデフケース3の一側部をベアリング4で軸支し、このデフケース3の他側部にはデフケース軸筒部5を設けてこの軸筒部5にベベルギヤ6を嵌合させ、このベベルギヤ6のギヤボス部7をベアリング8によって軸支し、このベベルギヤ6にはドライブベベルギヤ9を噛合わせ、デフギヤ2と一体であってデフケース3から左右方向に突出するデフ軸10には内周にスプラインを有するデフ軸筒部12を固着して設け、このデフ軸筒部12に車輪15へ動力を伝達する連動軸11を伸縮自在にスプライン嵌合させ、デフ軸筒部12の外端部をベアリング28によって前記スペーサ35に支持させたことを特徴とするトラクタのデフ装置の構成とする。
【0004】
作用
車輪への動力は、まずドライブベベルギヤ9からベベルギヤ6に伝えられる。そして、デフケース3が回転駆動され、左右のデフギヤ2の回転によってデフ軸10が回転され、これと一体のデフ軸筒部12が回転駆動される。このデフ軸筒部12には車輪側へ動力を伝える連動軸11が伸縮自在にスプライン嵌合されると共にデフ軸筒部12の外端部はベアリング28によってスペーサ35に支持されているのでコゼたりせずに安定した状態で連動軸11を支持でき、ファイナルケース等の伝動機構を経て左右の車輪に動力を伝える
【0005】
【発明の効果】
この発明は、前記の如く構成したので、次のような技術的効果を奏する。
トレッドを調節するときに、ファイナルケース23とアクスルハウジング1との間に適宜長さのスペーサ35を介装させて所定のトレッド長を得ることができ、この場合、連動軸11とデフ軸筒部12の軸方向位置が変わるが、両者はスプライン嵌合されていて、しかも伸縮自在であり、更にデフ軸筒部12の外端部はベアリング28によってスペーサ35に支持されているのでトレッド長の変更に関わらず、連動軸11を強固に支持できて長時間に亘り車輪に確実に動力を伝達できる。また、トレッドの変更に際し、アクスルハウジング1やデフケース3、あるいはデフ軸筒部12、連動軸11はそのまま利用できるので部品の共用化が図れる
【0006】
【実施例】
トラクタは、フレ−ム16の下部に前、後輪15を配設して、ステアリングハンドル17によって、油圧による操向シリンダ32,33の伸縮により操向自在に設ける。この操向シリンダ32,33は、フレ−ム16に一体のブラケット34と、ファイナルケ−ス23に対して操向自在の操向ケ−ス24の操向ア−ム27との間に設けられる。28は左右の車輪15の操向ア−ム27相互間を連結するタイロッドである。
【0007】
フレ−ム16前部上にはエンジンEが搭載され、操縦フロア19下のミッションケ−ス30にベルト伝動し、このミッションケ−ス30から前輪15側へ伝動軸22で出力し、後輪15側へ伝動軸18で出力し、又、後部の動力取出軸60へ伝動軸62で出力する。31はこの動力取出用変速伝動ケ−スである。20はフェンダ、41は操縦席、42はリフトレバ−、43はブレ−キペタルである。
【0008】
前記フレ−ム16の下部には、前後のアクスルハウジング1がフランジ部55で取付けられ、このアクスルハウジング1の左右両端部にファイナルケ−ス23を取付け、このファイナルケ−ス23の下端部に操向自在の操向ケ−ス24を設けて、前輪、後輪15を軸装している。これらアクスルハウジング1と各ファイナルケ−ス23との間には、適宜厚さのスペ−サ35,36、及び39,40を介在させて相互に連結する。
【0009】
前輪側のスペ−サ35,39と、後輪側のスペ−サ36,40との厚さを変える構成としてもよい。又、これらスペ−サ35,36、を介在させないでファイナルケ−ス23を直接アクスルハウジング1に連結する構成とすることもできる。アクスルハウジング1は、円筒形態で両端部に取付用のフランジを有し、左右間の中央部には、ベアリング4,8の軸受部を形成し、デフギヤ2やデフ軸10等を内装するデフケ−ス3を収容することができる。このデフケ−ス3の一側端を閉鎖するデフケ−スカバ−13のボス部14を該ベアリング4で軸受する。又、デフケ−ス3の他側端のデフケ−ス軸筒部5は、外周部にベベルギヤ6をスプライン嵌合させて、このベベルギヤ6のギヤボス部7をベアリング8で軸受する。
【0010】
これらデフケ−ス軸筒部5のデフギヤ2部とベベルギヤ6部との間は、ドライブベベルギヤ9が位置しうる程度の間隔を有し、このドライブベベルギヤ9とベベルギヤ6との間を噛合させる。このドライブベベルギヤ9はアクスルハウジング1に取付けられる軸受メタル21に軸受されて、前記伝動軸22,18を連結して伝動させる。
【0011】
デフケ−ス3の左右両側方には前記デフギヤ2によって連動されるデフ軸10が設けられ、このデフ軸10のデフ軸筒部には内周にスプラインを形成し、外周にはブレ−キディスク27、及びプレッシャプレ−ト28を嵌合させる構成としている。このデフ軸筒部12の先端部は、スペ−サ35,36に対してベアリング28で軸受している。
【0012】
このデフ軸筒部12の内部にスプライン嵌合する連動軸11は、ベアリング45でファイナルケ−ス23に軸受されて、外側端にベベルギヤ29を有し、ファイナルケ−ス23のキングピン軸25の上端部のベベルギヤ44と噛合させ、前記デフ軸10からデフ軸筒部12、連動軸11、ベベルギヤ29,44、キングピン軸25、及び操向ケ−ス24内のベベルギヤ26等を経て車輪15を駆動する構成としている。
【0013】
又、前記ブレ−キディスク27は、スペ−サ35,36が受座となり、ブレ−キカム46の操作によって作動されるプレッシャプレ−ト28の押圧力で摩擦制動される。前記デフケ−ス軸筒部5の先端部には、デフロック爪47がデフロックカム48の操作で係合できる。このデフロック爪47はデフ軸10に対して摺動自在に嵌合されて、ばね49でデフケ−ス軸筒部5に対して外方へ張圧され、該デフロックカム48は、このばね49に抗して押圧し、このデフケ−ス軸筒5の端面に形成の爪部に係合させて、デフケ−ス3とデフ軸10とを一体的に回転することによりデフロック状態にすることができる。
【0014】
37はリフトア−ムで、先端部にヒッチ38を有して、作業機を連結できる。このリフトア−ム37は、後部のアクスルハウジング1に一体の軸受メタル21において、前記ベベルギヤ9のギヤ軸50の左右両側部に横方向のピン51回りに上下回動自在に設ける。52はデフロックカム48を連動するデフロックペタル、53はその連動ロッド等の連動機構で、デフロックカム48のア−ム56に連動している。54はこの連動機構52の中間のリンクア−ムをアクスルハウジング1に対して枢支するリンクピンである。
【図面の簡単な説明】
【図1】後部アクスルハウジング部の正面図。
【図2】その一部の平面図。
【図3】その背面図。
【図4】ファイナルケ−ス部の正面図。
【図5】後部アクスルハウジング部の側面図。
【図6】その平面図。
【図7】全体の側面図。
【図8】そのアクスルハウジングの配置を示す平面図。
【符号の説明】
1 アクスルハウジング
2 デフギヤ
3 デフケ−ス
4 ベアリング
5 デフケ−ス軸筒部
6 ベベルギヤ
7 ギヤボス部
8 ベアリング
9 ドライブベベルギヤ
10 デフ軸
11 連動軸
12 デフ軸筒部
[0001]
[Industrial applications]
The present invention relates to a tractor differential device. This increases the degree of freedom in setting the left and right wheel intervals.
[0002]
2. Related Art and Problems to be Solved by the Invention
It is known that a differential device is housed inside a cylindrical axle housing. However, a pair of left and right differential shafts interlocked with a differential gear of the differential case is provided inside the axle housing via a meshing claw or the like. In order to connect to the wheel interlocking shaft, if the configuration is complicated and the left and right wheel intervals (treads) are different, an interlocking shaft having a unique length corresponding to the tread must be prepared.
[0003]
[Means for Solving the Problems]
According to the present invention, a final case 23 is attached to both left and right sides of a cylindrical axle housing 1 via spacers 35, and a steering case 24 that supports the wheels 15 is supported on the final case 23 so as to be steerable and rotatable. In the tractor, a differential case 3 containing a differential gear 2 is accommodated in a central portion in the left-right direction in the axle housing 1, and one side of the differential case 3 is supported by bearings 4, and the other side of the differential case 3 is supported. Is provided with a differential case shaft cylinder portion 5 , a bevel gear 6 is fitted to the shaft cylinder portion 5, a gear boss portion 7 of the bevel gear 6 is supported by a bearing 8 , and a drive bevel gear 9 is engaged with the bevel gear 6 . A differential shaft 10 which is integral with the differential gear 2 and protrudes from the differential case 3 in the left-right direction is fixed to a differential shaft cylindrical portion 12 having a spline on the inner periphery. And provided to this differential shaft cylindrical portion 12 of the interlocking shaft 11 for transmitting power to the wheels 15 telescopically splined, is supported by the spacer 35 and the outer end portion of the differential shaft cylinder part 12 by bearings 28 A tractor differential device is characterized in that:
[0004]
[ Action ]
Power to the wheels is first transmitted from the drive bevel gear 9 to the bevel gear 6. Then, the differential case 3 is rotationally driven, the differential shaft 10 is rotated by the rotation of the left and right differential gears 2, and the differential shaft cylinder portion 12 integrated with the differential shaft is rotationally driven. An interlocking shaft 11 for transmitting power to the wheel is telescopically spline-fitted to the differential shaft cylinder 12 and the outer end of the differential shaft cylinder 12 is supported by a spacer 35 by a bearing 28 so Without interlocking, the interlocking shaft 11 can be supported in a stable state, and power is transmitted to the left and right wheels via a transmission mechanism such as a final case .
[0005]
【The invention's effect】
Since the present invention is configured as described above, it has the following technical effects.
When adjusting the tread, a predetermined tread length can be obtained by interposing a spacer 35 having an appropriate length between the final case 23 and the axle housing 1, and in this case, the interlocking shaft 11 and the differential shaft cylinder portion Although the position of the shaft 12 in the axial direction changes, the two are spline-fitted and can be extended and contracted, and the outer end of the differential shaft cylinder 12 is supported by the spacer 35 by the bearing 28, so that the tread length is changed. Irrespective of this, the interlocking shaft 11 can be firmly supported and power can be reliably transmitted to the wheels for a long time. Further, when changing the tread, the axle housing 1, the differential case 3, the differential shaft cylinder 12, and the interlocking shaft 11 can be used as they are, so that parts can be shared .
[0006]
【Example】
The tractor is provided with front and rear wheels 15 disposed below the frame 16 and is steerably provided by a steering handle 17 by expanding and contracting steering cylinders 32 and 33 by hydraulic pressure. The steering cylinders 32 and 33 are provided between a bracket 34 integral with the frame 16 and a steering arm 27 of a steering case 24 which can be steered with respect to the final case 23. Can be Reference numeral 28 denotes a tie rod connecting the steering arms 27 of the left and right wheels 15 to each other.
[0007]
An engine E is mounted on the front part of the frame 16 and is transmitted to a transmission case 30 below the control floor 19 by a belt, and is output from the transmission case 30 to the front wheels 15 by a transmission shaft 22 to be transmitted to the rear wheels. The power is output to the power transmission shaft 18 to the rear side by the power transmission shaft 62 and to the rear power take-out shaft 60 . Reference numeral 31 denotes a power transmission speed change transmission case. 20 is a fender, 41 is a cockpit, 42 is a lift lever, and 43 is a brake pedal.
[0008]
Front and rear axle housings 1 are attached to the lower portion of the frame 16 by flange portions 55. Final case 23 is attached to both left and right end portions of the axle housing 1, and the lower case 23 is attached to the lower end of the final case 23. A steerable steering case 24 is provided, and the front wheel and the rear wheel 15 are mounted on the shaft. The axle housing 1 and each of the final cases 23 are interconnected via spacers 35, 36, 39, and 40 having appropriate thicknesses.
[0009]
The thickness of the spacers 35 and 39 on the front wheel side and the spacers 36 and 40 on the rear wheel side may be changed. Further, the final case 23 may be directly connected to the axle housing 1 without interposing the spacers 35 and 36. The axle housing 1 is cylindrical and has mounting flanges at both ends, and bearings for bearings 4 and 8 are formed at the center between the left and right, and a differential gear housing for the differential gear 2, the differential shaft 10, and the like. 3 can be accommodated. The boss portion 14 of the differential cover 13 that closes one end of the differential case 3 is supported by the bearing 4. Further, the bevel gear 6 is spline-fitted to the outer peripheral portion of the differential case cylindrical portion 5 at the other end of the differential case 3, and the gear boss portion 7 of the bevel gear 6 is supported by the bearing 8.
[0010]
There is an interval between the differential gear 2 of the differential case shaft portion 5 and the bevel gear 6 such that the drive bevel gear 9 can be located, and the drive bevel gear 9 and the bevel gear 6 are engaged with each other. The drive bevel gear 9 is supported by a bearing metal 21 attached to the axle housing 1 and connects the transmission shafts 22 and 18 for transmission.
[0011]
A differential shaft 10 interlocked with the differential gear 2 is provided on both left and right sides of the differential case 3. A spline is formed on the inner periphery of the differential shaft cylindrical portion of the differential shaft 10, and a brake disk is formed on the outer periphery. 27 and a pressure plate 28 are fitted. The distal end of the differential shaft cylinder 12 is supported by bearings 28 with respect to spacers 35 and 36.
[0012]
The interlocking shaft 11, which is spline-fitted inside the differential shaft cylinder portion 12, is supported by the final case 23 with a bearing 45, has a bevel gear 29 at the outer end, and has the kingpin shaft 25 of the final case 23. The wheel 15 is meshed with the bevel gear 44 at the upper end, and the wheel 15 is moved from the differential shaft 10 through the differential shaft cylinder 12, the interlocking shaft 11, the bevel gears 29 and 44, the kingpin shaft 25, the bevel gear 26 in the steering case 24, and the like. It is configured to be driven.
[0013]
Further, the brake disk 27 is frictionally braked by the pressing force of the pressure plate 28 which is operated by the operation of the brake cam 46, with the spacers 35 and 36 serving as seats. A differential lock claw 47 can be engaged with the distal end of the differential case shaft tube 5 by operating a differential lock cam 48. The differential lock pawl 47 is slidably fitted to the differential shaft 10 and is tensioned outwardly with respect to the differential case cylinder 5 by a spring 49. The differential case is engaged with the claw formed on the end surface of the differential case shaft cylinder 5, and the differential case 3 and the differential shaft 10 are integrally rotated to be in a differential lock state. .
[0014]
Reference numeral 37 denotes a lift arm, which has a hitch 38 at the tip so that a working machine can be connected. The lift arm 37 is provided on the left and right sides of the gear shaft 50 of the bevel gear 9 in a bearing metal 21 integral with the rear axle housing 1 so as to be rotatable up and down around a lateral pin 51. Reference numeral 52 denotes a differential lock petal for interlocking the differential lock cam 48, and reference numeral 53 denotes an interlocking mechanism such as an interlocking rod for interlocking with the arm 56 of the differential lock cam 48. Reference numeral 54 denotes a link pin for pivotally supporting an intermediate link arm of the interlocking mechanism 52 with respect to the axle housing 1.
[Brief description of the drawings]
FIG. 1 is a front view of a rear axle housing part.
FIG. 2 is a plan view of a part thereof.
FIG. 3 is a rear view thereof.
FIG. 4 is a front view of a final case.
FIG. 5 is a side view of a rear axle housing part.
FIG. 6 is a plan view thereof.
FIG. 7 is an overall side view.
FIG. 8 is a plan view showing the arrangement of the axle housing.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Axle housing 2 Differential gear 3 Differential case 4 Bearing 5 Differential case cylindrical part 6 Bevel gear 7 Gear boss part 8 Bearing 9 Drive bevel gear 10 Differential shaft 11 Interlocking shaft 12 Differential cylindrical part

Claims (1)

筒状のアクスルハウジング1の左右両側にスペーサ35を介してファイナルケース23を取り付け、このファイナルケース23に対して車輪15を軸支する操向ケース24を操向回動可能に支持したトラクタにおいて、前記アクスルハウジング1内の左右方向中央部にデフギヤ2を内装しているデフケース3を収容させ、このデフケース3の一側部をベアリング4で軸支し、このデフケース3の他側部にはデフケース軸筒部5を設けてこの軸筒部5にベベルギヤ6を嵌合させ、このベベルギヤ6のギヤボス部7をベアリング8によって軸支し、このベベルギヤ6にはドライブベベルギヤ9を噛合わせ、デフギヤ2と一体であってデフケース3から左右方向に突出するデフ軸10には内周にスプラインを有するデフ軸筒部12を固着して設け、このデフ軸筒部12に車輪15へ動力を伝達する連動軸11を伸縮自在にスプライン嵌合させ、デフ軸筒部12の外端部をベアリング28によって前記スペーサ35に支持させたことを特徴とするトラクタのデフ装置。 In a tractor in which a final case 23 is attached to both left and right sides of the cylindrical axle housing 1 via spacers 35, and a steering case 24 for supporting the wheels 15 with respect to the final case 23 is rotatably supported. wherein is housed a differential case 3 that furnished the Diff 2 in the left-right direction central portion of the axle housing 1, the one side of the differential case 3 is rotatably supported by bearings 4, the differential case shaft on the other side of the differential case 3 A bevel gear 6 is fitted to the shaft cylinder 5, and a gear boss 7 of the bevel gear 6 is supported by a bearing 8 . A differential shaft cylindrical portion 12 having a spline on the inner periphery is fixedly provided on a differential shaft 10 projecting from the differential case 3 in the left-right direction, The differential shaft cylindrical portion 12 of the interlocking shaft 11 for transmitting power to the wheels 15 telescopically splined of, and characterized in that is supported by the spacer 35 and the outer end portion of the differential shaft cylinder part 12 by bearings 28 Tractor differential device.
JP02448494A 1994-02-22 1994-02-22 Tractor differential device Expired - Fee Related JP3564716B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP02448494A JP3564716B2 (en) 1994-02-22 1994-02-22 Tractor differential device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP02448494A JP3564716B2 (en) 1994-02-22 1994-02-22 Tractor differential device

Publications (2)

Publication Number Publication Date
JPH07232505A JPH07232505A (en) 1995-09-05
JP3564716B2 true JP3564716B2 (en) 2004-09-15

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Family Applications (1)

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JP02448494A Expired - Fee Related JP3564716B2 (en) 1994-02-22 1994-02-22 Tractor differential device

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100903065B1 (en) * 2007-02-28 2009-06-18 이세키노우키가부시키가이샤 Work vehicle
CN108215696B (en) * 2018-03-27 2023-12-15 四川川龙拖拉机制造有限公司 Leveling device, leveling steering drive axle and tractor

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