JP2846796B2 - Work machine 2WD / 4WD switching structure - Google Patents
Work machine 2WD / 4WD switching structureInfo
- Publication number
- JP2846796B2 JP2846796B2 JP20600493A JP20600493A JP2846796B2 JP 2846796 B2 JP2846796 B2 JP 2846796B2 JP 20600493 A JP20600493 A JP 20600493A JP 20600493 A JP20600493 A JP 20600493A JP 2846796 B2 JP2846796 B2 JP 2846796B2
- Authority
- JP
- Japan
- Prior art keywords
- wheel drive
- wheel
- case
- transmission
- wheels
- 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 - Lifetime
Links
Landscapes
- Arrangement And Driving Of Transmission Devices (AREA)
Description
【0001】[0001]
【産業上の利用分野】本発明は、芝刈機や田植機といっ
た作業機の2駆・4駆切換構造に係り、詳しくは、該切
換手段とローリング支持手段との融合による合理化構造
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-wheel drive / four-wheel drive switching structure of a working machine such as a lawn mower or a rice transplanter, and more particularly, to a rationalizing structure by fusing the switching means with a rolling support means.
【0002】[0002]
【従来の技術】4輪駆動可能な作業機では、確実な4輪
接地による有効な駆動力を得るために、前後いずれかの
車輪をローリング自在に支承するのが一般的である。例
えば、実開平4−71305号公報で示される芝刈機で
は、確実な接地荷重の4輪分散化によって芝を傷め難い
点でも好都合である。2. Description of the Related Art In a working machine capable of four-wheel drive, it is common to support one of the front and rear wheels in a freely rolling manner in order to obtain an effective driving force by reliable four-wheel grounding. For example, the lawn mower disclosed in Japanese Utility Model Laid-Open Publication No. 4-71305 is advantageous in that it is difficult to damage the turf due to the reliable dispersion of the ground load into four wheels.
【0003】[0003]
【発明が解決しようとする課題】4輪駆動機では、2輪
駆動との切換クラッチを有しており、通常では特開昭6
3−291723号公報で示されたトラクタのように、
切換クラッチをトランスミッションケース側に配設して
機能の集約化を図ってある。しかしながら、基本的には
2輪駆動用に設定し、4輪駆動機にはミッション外に切
換クラッチを追加装備して対処することが、トランスミ
ッションを小型にしながらの汎用化の点で望ましいもの
である。本発明の目的は、2駆・4駆の切換クラッチを
ミッション外装としての汎用化と、駆動切換対象車輪の
ローリング支持手段とを兼備するに、これらが有機的に
結合した合理的な構造として提供させる点にある。A four-wheel drive machine has a switching clutch for two-wheel drive.
As in the tractor shown in 3-291723,
The switching clutch is disposed on the transmission case side to consolidate functions. However, basically, it is desirable to set it for two-wheel drive and to provide a four-wheel drive machine with an additional switching clutch outside the transmission in order to cope with the downsizing of the transmission and to make it more versatile. . An object of the present invention is to provide a rational structure in which the two-wheel drive and four-wheel drive switching clutches are used as a transmission exterior as well as rolling support means for the wheels to be switched and are organically combined. It is in the point to let.
【0004】[0004]
【課題を解決するための手段】上記目的の達成のために
本発明は、駆動源の動力を前後一方の駆動輪に伝動する
トランスミッションと、他方の車輪に対するデフ機構と
を伝動連結可能な4輪駆動用軸を備え、デフ機構への動
力を断続する切換クラッチを4輪駆動用軸部位に設ける
とともに、他方の車輪をローリング自在に支持するべ
く、切換クラッチが収容されるサポートケースを、デフ
機構が収容される後車軸ケースを前後方向軸心周りで揺
動可能に支承する部材に構成してあることを特徴とす
る。SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a four-wheel drive capable of transmitting and connecting a transmission for transmitting the power of a drive source to one of front and rear drive wheels and a differential mechanism for the other wheel. A four-wheel drive shaft is provided with a switching clutch that has a driving shaft and intermits power to the differential mechanism, and a support case in which the switching clutch is housed to support the other wheel in a freely rolling manner. The rear axle case in which is accommodated is configured to be a member that swingably supports around a longitudinal axis.
【0005】[0005]
【作用】つまり、2駆・4駆の切換クラッチを4輪駆動
用軸部位に設けることにより、2輪駆動機では、必要の
ない切換クラッチが省略された無駄のない状態としてト
ランスミッションを使用できるとともに、4輪駆動機で
は、4輪駆動用軸を設けることによって必要な切換クラ
ッチも装備できるようになる。そして、4輪駆動機では
必要な切換クラッチを内装するサポートケースが、駆動
切換対象車輪をローリング支持する部材になるから、専
用の支持部材の省略が図れるようになる。In other words, by providing the two-wheel drive / four-wheel drive switching clutch at the four-wheel drive shaft portion, the transmission can be used in a two-wheel drive machine in a state in which unnecessary switching clutches are omitted and there is no waste. In a four-wheel drive machine, by providing a four-wheel drive shaft, a necessary switching clutch can be provided. In the four-wheel drive machine, the support case containing the necessary switching clutch is a member for rollingly supporting the wheels to be switched, so that a dedicated support member can be omitted.
【0006】[0006]
【発明の効果】従って、4輪駆動機でのみ必要となる4
輪駆動用軸部位に切換クラッチを設け、かつ、そのクラ
ッチケースをローリング支持部材とする多機能化工夫に
より、所望機能を部品点数を少なくして得られる合理的
構造としながら2駆・4駆でトランスミッションの汎用
化が図れるものを提供できた。Therefore, only the four-wheel drive machine needs the
A switching clutch is provided at the wheel drive shaft, and the clutch case is a rolling support member. A transmission that can be used for general purposes was provided.
【0007】[0007]
【実施例】以下に、本発明の実施例を、作業機の一例で
ある芝刈機の場合について図面に基づいて説明する。図
1にフロントマウントの乗用型芝刈機が、図2にはその
伝動系の主要部が示され、1は操縦部、2は原動部、3
は駆動前輪、4は操向後輪、5はモーアである。エンジ
ン2aの動力は、伝動軸6を介してHST7に伝動し、
その出力軸7aと前輪用の第1デフ機構8とをミッショ
ンケースMのトランスミッションTmを介してギヤ連動
してあるとともに、後述する4輪駆動用軸9aにも伝動
する構造である。又、HST7の入力軸7bを延長した
出力軸7cとモーア5とを伝動軸10で連動してある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings for a case of a lawn mower as an example of a working machine. FIG. 1 shows a front-mounted riding lawn mower, and FIG. 2 shows a main part of its transmission system.
Is a front drive wheel, 4 is a rear steering wheel, and 5 is a mower. The power of the engine 2a is transmitted to the HST 7 via the transmission shaft 6,
The output shaft 7a and the first differential mechanism 8 for the front wheels are gear-linked via a transmission Tm of the transmission case M, and are transmitted to a four-wheel drive shaft 9a to be described later. Further, the output shaft 7c, which is an extension of the input shaft 7b of the HST 7, and the mower 5 are linked by a transmission shaft 10.
【0008】4輪駆動用軸9aの後部には、操向後輪4
を駆動可能な後輪駆動装置9、及び後輪4をローリング
自在に支持する支持機構27が夫々構成されている。後
輪駆動装置9は、図2と図3に示すように、カバーケー
ス11aとサポートケース11bとを一体化して成るケ
ーシング11に、4輪駆動用軸9aと後輪用の第2デフ
機構12にベベル連動するピニオン軸13とを断続する
切換クラッチAを内装して構成されている。4輪駆動用
軸9aに連動連結された中間軸14に駆動側シフタ15
をスプライン外嵌し、駆動側シフタ15をスライド操作
するシフトフォーク16とフォーク軸17とをカバーケ
ース11aに支持して切換クラッチAが構成されてい
る。 つまり、駆動側シフタ15を後方にシフトして、
ピニオン軸13にスプライン外嵌した従動側シフタ18
に咬合させると4輪駆動状態になり、前方にシフトして
従動側シフタ18との咬合を解除すれば2輪駆動状態に
なる。A rear steering wheel 4 is provided at the rear of the four-wheel drive shaft 9a.
, And a supporting mechanism 27 that supports the rear wheel 4 in a freely rolling manner. As shown in FIGS. 2 and 3, the rear wheel drive device 9 includes a four-wheel drive shaft 9a and a second wheel differential mechanism 12 for a rear wheel, which are formed by integrating a cover case 11a and a support case 11b. And a switching clutch A for intermittently connecting with a pinion shaft 13 interlocked with a bevel. A drive-side shifter 15 is attached to the intermediate shaft 14 interlocked with the four-wheel drive shaft 9a.
The switching clutch A is formed by fitting a shift fork 16 and a fork shaft 17 for slidingly driving the drive-side shifter 15 to the cover case 11a. That is, the drive shifter 15 is shifted rearward,
Driven shifter 18 externally fitted with spline to pinion shaft 13
When the vehicle is shifted to the front side and the bite with the driven shifter 18 is released, a two-wheel drive state is established.
【0009】支持機構27は、第2デフ機構12を囲繞
する後車軸ケース19の前方突出部19aをサポートケ
ース11bに内嵌し、かつ、後方突出部19bを軸受け
部20に内嵌して構成され、これによって後車軸ケース
19を前後方向の軸心P周りでローリング自在に支持し
てある。尚、ケーシング11と軸受け部20とは機体に
固定支持されており、サポートケース11bは後輪駆動
装置9のカバー機能と、後車軸ケース19の支承機能と
を備えた部材になっている。The support mechanism 27 has a structure in which a front projection 19a of a rear axle case 19 surrounding the second differential mechanism 12 is fitted in the support case 11b, and a rear projection 19b is fitted in the bearing 20. Thus, the rear axle case 19 is supported so as to freely roll around the axis P in the front-rear direction. The casing 11 and the bearing portion 20 are fixedly supported by the body, and the support case 11b is a member having a function of covering the rear wheel drive device 9 and a function of supporting the rear axle case 19.
【0010】図4に後輪4の支持構造が示されている。
後輪4を支承する操舵ケース21と、後車軸ケース19
端に装着された支承ケース22とを斜め伝動軸23で伝
動可能に、かつ、伝動軸23の軸心周りで操舵自在に枢
支連結する構造である。操舵ケース21の下端には、伝
動軸23用のベアリング24に対するシールキャップ2
5を設けてあるが、障害物との接触おそれを軽減する目
的で、操舵ケース21下端から若干上の位置に嵌入装着
してある。尚、26はシールキャップ25外し用のため
に操舵ケース21下端に形成された溝である(図5参
照)。FIG. 4 shows a support structure for the rear wheel 4.
A steering case 21 for supporting the rear wheel 4 and a rear axle case 19
This is a structure in which the bearing case 22 mounted on the end is pivotally connected so that it can be transmitted by the oblique transmission shaft 23 and can be steered around the axis of the transmission shaft 23. At the lower end of the steering case 21, a seal cap 2 for a bearing 24 for a transmission shaft 23 is provided.
The steering wheel 21 is provided at a position slightly above the lower end of the steering case 21 for the purpose of reducing the possibility of contact with an obstacle. Reference numeral 26 denotes a groove formed at the lower end of the steering case 21 for removing the seal cap 25 (see FIG. 5).
【0011】〔別実施例〕後輪を常時駆動輪に、かつ、
前輪を操向輪に構成し、前輪に対する2駆・4駆の切換
構造を構成するものでも良い。[Alternative Embodiment] The rear wheel is always a driving wheel, and
The front wheels may be configured as steered wheels, and a two-wheel drive / four-wheel drive switching structure for the front wheels may be configured.
【0012】尚、特許請求の範囲の項に図面との対照を
便利にするために符号を記すが、該記入により本発明は
添付図面の構成に限定されるものではない。In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.
【図1】芝刈機の側面図FIG. 1 is a side view of a lawn mower.
【図2】伝動系を示す一部切欠き側面図FIG. 2 is a partially cutaway side view showing a transmission system.
【図3】切換クラッチの構造を示す断面図FIG. 3 is a sectional view showing the structure of a switching clutch.
【図4】後輪の支持構造を示す要部の断面図FIG. 4 is a sectional view of a main part showing a support structure of a rear wheel.
【図5】操舵ケース下端部の底面図FIG. 5 is a bottom view of the lower end of the steering case.
3 駆動輪 4 車輪 9a 4輪駆動用軸 11b サポートケース 12 デフ機構 19 後車軸ケース A 切換クラッチ Tm トランスミッション Reference Signs List 3 drive wheel 4 wheel 9a 4-wheel drive shaft 11b support case 12 differential mechanism 19 rear axle case A switching clutch Tm transmission
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 昭61−127028(JP,U) (58)調査した分野(Int.Cl.6,DB名) B60K 17/32 B60K 17/344──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-227028 (JP, U) (58) Fields surveyed (Int. Cl. 6 , DB name) B60K 17/32 B60K 17/344
Claims (1)
(3),(3)に伝動するトランスミッション(Tm)
と、他方の車輪(4),(4)に対するデフ機構(1
2)とを伝動連結可能な4輪駆動用軸(9a)を備え、
前記デフ機構(12)への動力を断続する切換クラッチ
(A)を前記4輪駆動用軸(9a)部位に設けるととも
に、前記他方の車輪(4),(4)をローリング自在に
支持するべく、前記切換クラッチ(A)が収容されるサ
ポートケース(11b)を、前記デフ機構(12)が収
容される後車軸ケース(19)を前後方向軸心周りで揺
動可能に支承する部材に構成してある作業機の2駆・4
駆切換構造。A transmission (Tm) for transmitting the power of a drive source to one of front and rear drive wheels (3).
And a differential mechanism (1) for the other wheels (4) and (4).
2) is provided with a four-wheel drive shaft (9a) capable of transmission connection with
A switching clutch (A) for interrupting power to the differential mechanism (12) is provided at the four-wheel drive shaft (9a), and the other wheels (4) and (4) are supported in a freely rolling manner. The support case (11b) accommodating the switching clutch (A) is a member for supporting the rear axle case (19) accommodating the differential mechanism (12) so as to be swingable around a longitudinal axis. 2WD and 4 working machines
Drive switching structure.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20600493A JP2846796B2 (en) | 1993-08-20 | 1993-08-20 | Work machine 2WD / 4WD switching structure |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20600493A JP2846796B2 (en) | 1993-08-20 | 1993-08-20 | Work machine 2WD / 4WD switching structure |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH0752667A JPH0752667A (en) | 1995-02-28 |
JP2846796B2 true JP2846796B2 (en) | 1999-01-13 |
Family
ID=16516320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP20600493A Expired - Lifetime JP2846796B2 (en) | 1993-08-20 | 1993-08-20 | Work machine 2WD / 4WD switching structure |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2846796B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101343643B1 (en) * | 2013-06-11 | 2014-01-15 | 정민수 | Lawn cutter apparatus |
-
1993
- 1993-08-20 JP JP20600493A patent/JP2846796B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH0752667A (en) | 1995-02-28 |
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