JPH04197835A - Work car - Google Patents

Work car

Info

Publication number
JPH04197835A
JPH04197835A JP33455190A JP33455190A JPH04197835A JP H04197835 A JPH04197835 A JP H04197835A JP 33455190 A JP33455190 A JP 33455190A JP 33455190 A JP33455190 A JP 33455190A JP H04197835 A JPH04197835 A JP H04197835A
Authority
JP
Japan
Prior art keywords
speed
pedal
change gear
arm
control
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
JP33455190A
Other languages
Japanese (ja)
Inventor
Yoji Fujiwara
藤原 洋司
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 JP33455190A priority Critical patent/JPH04197835A/en
Publication of JPH04197835A publication Critical patent/JPH04197835A/en
Pending legal-status Critical Current

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  • Harvester Elements (AREA)
  • Controls For Constant Speed Travelling (AREA)
  • Gear-Shifting Mechanisms (AREA)

Abstract

PURPOSE:To easily switch a work vehicle from a constant-speed running state to a loaded running state by providing a speed fixing means consisting of a motor-driven actuator for stopping a change gear pedal from returning to its neutral position and an actuator control means for driving the motor-driven actuator to a position corresponding to the control of the change gear pedal. CONSTITUTION:In the case to run a work car at constant speed while fixing a change gear pedal 9, a control switch 17 is on. Then the amount by which the change gear pedal 9 is released is detected by a potentiometer. The detected value is compared to the detected value of the angle of rotation of a push arm 10 by an arithmetic portion 19b provided in a controller 19. A push-arm controlling motor 11 is driven according to the deviation value of this comparison and the push arm 10 is put in a turning movement to as far as a position at which it makes contact with a change gear arm 7 which is associated with the change gear pedal 9. Therefore the change gear pedal 9 is prevented from returning to its neutral position and a constant-speed running state is maintained. If overloads act on a working device, a control mode changeover switch 18 is switched to load mode. Then the change gear arm 7 is driven to its change gear side and speed control is carried out whereby loads are kept constant.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、中立位置に復帰可能な変速ペダルの踏込み操
作により前後方向に無段階に走行速度を変更可能な無段
変速装置と、前記無段変速装置を任意の前進速度で固定
並びに固定解除自在な速度固定装置とを備えてある作業
車に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides a continuously variable transmission capable of steplessly changing the traveling speed in the longitudinal direction by depressing a speed change pedal that can return to a neutral position; The present invention relates to a work vehicle equipped with a speed fixing device that can fix and release a speed change gear at any forward speed.

〔従来の技術〕[Conventional technology]

従来、無段変速装置を任意の前進速度で固定する速度固
定装置は、実開平2−90456号公報に示される如く
、無段変速装置の変速ペダルを、レバー操作による摩擦
抵抗によって固定保持する機械式のものであった。
Conventionally, a speed fixing device that fixes a continuously variable transmission at an arbitrary forward speed is a machine that fixes and holds the gear change pedal of the continuously variable transmission by frictional resistance caused by lever operation, as shown in Japanese Utility Model Application Publication No. 2-90456. It was a ceremony.

〔発明か解決しようとする課題〕[Invention or problem to be solved]

速度固定装置による変速ペダル固定状態での定速走行作
業時に、作業装置に過負荷か作用すると、ペダルロック
を解除して、エンジンストップを回避することとなるが
、機械式のものでは、そのための操作か煩られしく、又
、走行速度を遅くして負荷を回避して後のペダルロック
操作も煩られしく、操作の煩雑さを解消するものか望ま
れていた。
If an overload is applied to the working device during constant-speed driving with the speed change pedal fixed by the speed fixing device, the pedal lock will be released to avoid engine stoppage. It is cumbersome to operate, and it is also cumbersome to operate the pedal lock after reducing the traveling speed to avoid the load, so there has been a desire for something that eliminates the cumbersome operation.

本発明は、速度固定装置を工夫することによって操作の
煩雑さを解消するとともに、定速走行から負荷走行への
切換えが容易に行なえるよう(こすることを目的とする
An object of the present invention is to eliminate the complexity of operation by devising a speed fixing device, and to easily switch from constant speed running to loaded running.

〔課題を解決するための手段〕[Means to solve the problem]

上記目的を達成する為の本発明の特徴構成は、前記速度
固定装置を、前記ペダル又はペダルに連係の連係機構に
片当り接当して前記変速ペダルの中立位置への復帰を阻
止する電動アクチュエータから構成し、前記変速ペダル
の操作位置を検出する検出手段、及び、前記電動アクチ
ュエータの作動位置を検出する手段、並びに、前記両手
段の検出結果を比較して、変速ペダル操作位置に対応し
た位置まで前記電動アクチュエータを駆動するアクチュ
エータ制御手段とからなる速度固定手段を設けるととも
に、前記変速ペダルが任意の操作位置にあるときのエン
ジンの回転数を記憶する記憶手段、及び、エンジンの実
回転数を検出する検出手段、並びに、前記両手段の検出
結果を比較して、その偏差か設定範囲内に維持されるよ
うに前記電動アクチュエータを駆動するアクチュエータ
制御手段とからなる速度調節手段を設け、さらに、速度
固定手段作動状態と速度調節手段作動状態とに択一的に
切換える制御モード切換手段を設けた点にあり、その作
用、効果は次の通りである。
A characteristic configuration of the present invention for achieving the above object is an electric actuator that prevents the speed change pedal from returning to a neutral position by bringing the speed fixing device into partial contact with the pedal or a linkage mechanism linked to the pedal. a detection means for detecting the operating position of the gear shift pedal, a means for detecting the operating position of the electric actuator, and a position corresponding to the gear shift pedal operating position by comparing the detection results of both the means. a speed fixing means comprising an actuator control means for driving the electric actuator up to a speed, a storage means for storing the engine rotational speed when the speed change pedal is at an arbitrary operating position, and a storage means for storing the actual engine rotational speed. A speed adjustment means is provided, comprising a detection means for detecting the detection, and an actuator control means for comparing the detection results of the two means and driving the electric actuator so that the deviation thereof is maintained within a set range, and further, The present invention is provided with a control mode switching means for selectively switching between a speed fixing means operating state and a speed adjusting means operating state, and its functions and effects are as follows.

〔作 用〕[For production]

変速ペダルを固定して定速走行を行う場合には、第1図
に示す如く、制御モード切換スイッチ(18)が、速度
モード、つまり、速度固定手段作動状態に切換っている
ことを確認して制御スイッチ(17)をONにする。す
ると、その時の変速ペダル(9)の踏込量が、ペダル回
動操作軸に設けたポテンショメータ(14)を介して制
御装置(19)に記憶される。そして、その時の記憶値
と、制御モータ(11)によって駆動されるブツシュア
ーム(lO)の回転角検出値(この場合は、回転角か零
)とか、マイクロコンピュータ利用の制御装置(19)
内の演算部(19b)で比較されて、その偏差値に基い
てブツシュアーム制御モータ(11)が駆動され、ブツ
シュアーム(10)が変速ペダル(9)に連係の変速ア
ーム(7)に接触する位置まで回動されて、変速ペダル
(9)の中立位置への復帰を阻止して定速走行状態を維
持する。
When driving at a constant speed with the gear change pedal fixed, make sure that the control mode selector switch (18) is switched to the speed mode, that is, the speed fixing means is activated, as shown in Figure 1. Turn on the control switch (17). Then, the amount of depression of the speed change pedal (9) at that time is stored in the control device (19) via the potentiometer (14) provided on the pedal rotation operation shaft. Then, the stored value at that time, the detected rotation angle value (in this case, the rotation angle or zero) of the bushing arm (lO) driven by the control motor (11), and the control device (19) using a microcomputer
The bushing arm control motor (11) is driven based on the deviation value, and the bushing arm (10) contacts the shift arm (7) linked to the shift pedal (9). This prevents the speed change pedal (9) from returning to the neutral position and maintains a constant speed running state.

そして、定速走行状態での作業時に、作業装置に過負荷
か作用した場合には、制御モード切換スイッチ(18)
を、負荷モード、つまり、速度調節手段作動状態に切換
える。すると、その時の変速ペダル(9)の踏込量か予
め設定されたエンジンの基準回転数として記憶され、そ
の記憶した基準回転数と、電磁ピックアップ装置(16
)によって検出されたエンジンの実回転数とか比較され
て、その偏差値に基いて前記変速アーム(7)を減速側
に駆動して負荷を一定に保つ速度制御か行なわれる。
If an overload is applied to the work equipment during work at a constant speed, the control mode changeover switch (18) is activated.
is switched to the load mode, that is, to the speed adjustment means operating state. Then, the amount of depression of the gear shift pedal (9) at that time is stored as the preset engine reference rotation speed, and the stored reference rotation speed and the electromagnetic pickup device (16
) is compared with the actual rotational speed of the engine detected by the speed change arm (7), and speed control is performed to keep the load constant by driving the speed change arm (7) to the deceleration side based on the deviation value.

〔発明の効果〕〔Effect of the invention〕

上記構成の結果、速度固定装置による定速走行状態での
作業時に、作業装置に過負荷か作用した場合の速度制御
への切換えがモード切換手段としてのモード切換スイッ
チによって迅速、容易に行え、又、過負荷を回避して後
の定速走行への復帰操作も前記モード切換スイッチによ
って容易に行なえ、使い勝手に優れたものとなる。
As a result of the above configuration, when working at a constant speed using the speed fixing device, if an overload is applied to the working device, switching to speed control can be quickly and easily performed using the mode changeover switch as the mode changeover means. The operation of returning to constant speed running after avoiding an overload can be easily performed using the mode changeover switch, resulting in excellent usability.

〔実施例〕 以下、本発明の実施例を作業車の一例であるミツドマウ
ント型の乗用芝刈機について説明する。
[Embodiment] Hereinafter, an embodiment of the present invention will be described with respect to a mid-mount type riding lawn mower, which is an example of a work vehicle.

第3図に示す如く、エンジン(1)から伝動軸(2)を
介して静油圧式無段変速装置(H3T) (3)に伝動
し、そのHS T (3)からミッションケース(4)
内のトランスミッションに伝動して後輪(5b)を駆動
し、そして、前・後輪(5a)、 (5b)の間にモー
ア(6)を装着してミツトマウント型の乗用芝刈機を構
成しである。
As shown in Figure 3, power is transmitted from the engine (1) to the hydrostatic continuously variable transmission (H3T) (3) via the transmission shaft (2), and from the HST (3) to the mission case (4).
The transmission is transmitted to the transmission inside the lawn mower to drive the rear wheels (5b), and a mower (6) is installed between the front and rear wheels (5a) and (5b) to form a mitsuto mount type riding lawn mower. It is.

第1図に示す如く、HS T (3)の斜板角を変更す
る中立復帰可能な変速アーム(7)と変速ペダル(9)
とかロット(8)を介して連結されている。
As shown in Figure 1, a shift arm (7) that can return to neutral and a shift pedal (9) that change the swash plate angle of the HST (3).
They are connected via a lot (8).

そして、前進側に操作された変速アーム(7)に対して
後方から接当することにより、前記変速ペダル(9)の
中立位置への復帰を阻止する速度固定装置を設けてある
A speed fixing device is provided which prevents the speed change pedal (9) from returning to the neutral position by coming into contact with the speed change arm (7) from the rear when the speed change arm (7) is operated in the forward direction.

前記速度固定装置は、前記変速アーム(7)に接当可能
なブツシュアーム(10)を備えた正・逆転可能な直流
モータ(11)から構成されており、その電動モータ(
11)と前記ブツシュアーム(10)とは、第2図に示
す如く、スプリング(12)によって圧接された摩擦板
(13a)、 (13b)を介して連係されている。
The speed fixing device is composed of a direct current motor (11) that is capable of forward and reverse rotation and is equipped with a bushing arm (10) that can come into contact with the speed change arm (7).
11) and the bush arm (10) are linked via friction plates (13a) and (13b) pressed together by a spring (12), as shown in FIG.

第1図に示す如く、変速ペダル(9)の操作角を検出す
るポテンショメータ(14)、ブツシュアーム(10)
の回転角を検出するポテンショメータ(15)、エンジ
ン(1)の回転数を検出する電磁ピックアップ装置(1
6)、制御始動スイッチ(17)、速度・負荷モード切
換スイッチ(18)、モーデ駆動用操作スイッチ(23
)の夫々かマイクロコンピュータ利用の制御装置(I9
)に連係され、その制御装置(19)に前記ブツシュア
ームの電動モータ(11)か連係されている。
As shown in Fig. 1, a potentiometer (14) and a bushing arm (10) detect the operating angle of the speed change pedal (9).
a potentiometer (15) that detects the rotation angle of the engine (1), and an electromagnetic pickup device (1) that detects the rotation speed of the engine (1).
6), control start switch (17), speed/load mode selection switch (18), mode drive operation switch (23)
) or a control device using a microcomputer (I9
), and the electric motor (11) of the bushing arm is also linked to the control device (19).

次に、制御状態について説明する。変速ペダル(9)を
固定して定速走行を行う場合には、速度・負荷モード切
換スイッチ(18)か速度モード、つまり、速度固定手
段作動状態に切換えられていることを確認して、制置装
置始動スイッチ(17)をON操作する。すると、ペダ
ルのポテンショメータ(14)からのペダル操作角の検
出値と、ブツシュアームのポテンショメータ(15)か
らの回転角検出値(この場合は、回転角か零)とか、制
御装置(19)内の演算部(19a)で比較され、その
偏差値に基いて、前記ブツシュアーム(10)か変速ア
ーム(7)に接触する位置まで回動され、変速ペダル(
9)の中立位置への復帰を阻止して定速状態に維持する
Next, the control state will be explained. When driving at a constant speed with the gear change pedal (9) fixed, make sure that the speed/load mode selector switch (18) is switched to the speed mode, that is, the speed fixing means is activated, and then Turn on the equipment start switch (17). Then, the detected value of the pedal operation angle from the pedal potentiometer (14), the detected rotation angle value from the bush arm potentiometer (15) (in this case, the rotation angle or zero), and the calculation in the control device (19). (19a), and based on the deviation value, the bushing arm (10) or the shift arm (7) is rotated to a position where it contacts the shift arm (7), and the shift pedal (
9) is prevented from returning to the neutral position to maintain a constant speed state.

そして、変速ペダル(9)を固定しての定速走行から、
モーアに対する過負荷により、速度調節に切換える場合
は、モード切換スイッチ(18)を負荷モード、つまり
、速度調節手段作動状態に切換える。すると、その時の
変速ペダル(9)の操作角をエンジンの基準回転数とし
て記憶メモリ(19b)で記憶し、その記憶した値と、
エンジンの電磁ピックアップ装置(16)からのエンジ
ンの実回−転数とを演算部(19a)で比較して、その
偏差値に基いて前記ブツシュアーム制御モータ(1])
を正・逆転させて、負荷か大きければ減速側、負荷が小
さければ増速側に変速操作を行うようになっている。そ
して、制御スイッチ(17)をOFFにすれば、前記ブ
ツシュアーム(10)は中立復帰可能な変速アーム(7
)によって中立位置に押し戻される。又、前記ブツシュ
アーム(10)は、ブレーキペダル(20)を踏込めば
、ブレーキペダル(20)に連係のリンク機構(21)
を介してブツシュアーム側の摩擦板(13a)が、モー
タ側の摩擦板(13b)から離間されて、中立復帰可能
な変速アーム(7)によって中立位置に押し戻されるよ
うになっており、そして、ブレーキペダル(20)によ
って操作されるスイッチ(22)を介して制御装置(1
9)の制御回路か断たれるようになっている。又、前記
負荷制御は、モーデ駆動用操作スイッチ(23)かON
で、速度・負荷モード切換スイッチ(18)か負荷モー
ドに切換っているときのみ制御か働く。
Then, from constant speed driving with the speed change pedal (9) fixed,
When switching to speed adjustment due to an overload on the mower, the mode selector switch (18) is switched to the load mode, that is, the speed adjustment means is activated. Then, the operation angle of the gear change pedal (9) at that time is stored in the storage memory (19b) as the reference rotation speed of the engine, and the stored value and
The arithmetic unit (19a) compares the engine's actual rotation speed from the engine's electromagnetic pickup device (16), and based on the deviation value, the bush arm control motor (1)
If the load is large, the speed is changed to the deceleration side, and if the load is small, the speed is changed to the speed increase side. Then, when the control switch (17) is turned OFF, the bushing arm (10) can return to neutral.
) is pushed back to the neutral position. Further, when the brake pedal (20) is depressed, the bush arm (10) engages a link mechanism (21) that is linked to the brake pedal (20).
The friction plate (13a) on the bushing arm side is separated from the friction plate (13b) on the motor side via The control device (1) is controlled via a switch (22) operated by a pedal (20).
9) control circuit is cut off. In addition, the load control is performed by turning on the mode drive operation switch (23).
The control only works when the speed/load mode selector switch (18) is switched to load mode.

上記実施例において、ブツシュアーム(10)を備えた
電動モータ(11)を総称して変速ペダルの中立位置へ
の復帰を阻止する電動アクチュエータ(A)と称し、変
速ペダル(9)の操作角を検出するポテンショメータ(
14)を称して変速ペダルの操作位置を検出する検出手
段と称し、そして、ブツシュアーム(10)の回転角を
検出するポテンショメータ(15)を称して電動アクチ
ュエータ(A)の作動位置を検出する手段と称し、さら
に、制御装置(19)を称してアクチュエータ制御手段
と称し、そして、制御装置内の記憶メモリ(19b)を
称して変速ペダルが任意の操作位置にあるときのエンジ
ンの回転数を記憶する記憶手段と称し、制御装置(19
)内の演算部(19a)をして比較手段と称し、さらに
また、電磁ピックアップ装置(16)を称してエンジン
の実回転数を検出する検出手段と称し、そして、速度・
負荷モード切換スイッチ(18)を称して、制御モード
切換手段と称す。
In the above embodiment, the electric motor (11) equipped with the bushing arm (10) is collectively referred to as an electric actuator (A) that prevents the speed change pedal from returning to the neutral position, and detects the operating angle of the speed change pedal (9). potentiometer (
14) is referred to as a detection means for detecting the operation position of the gear change pedal, and a potentiometer (15) for detecting the rotation angle of the bushing arm (10) is referred to as means for detecting the operation position of the electric actuator (A). Further, the control device (19) is referred to as an actuator control means, and the storage memory (19b) in the control device is referred to as a storage memory (19b) that stores the engine rotational speed when the speed change pedal is at an arbitrary operation position. It is called a storage means, and the control device (19
) is referred to as a comparison means, and the electromagnetic pickup device (16) is referred to as a detection means for detecting the actual rotational speed of the engine.
The load mode changeover switch (18) is referred to as control mode changeover means.

又、前記ブツシュアーム(10)は、変速ペダル(9)
に連係の連係機構としての変速アーム(7)に接当する
ものを例示したが、ロッド(8)に接当部を設けて、あ
るいは、変速ペダル(9)に接当するようにしてもよい
Further, the bushing arm (10) is connected to the gear shift pedal (9).
In the example shown in FIG. 1, a linkage mechanism that contacts the speed change arm (7) is provided, but it is also possible to provide a contact portion on the rod (8) or contact the speed change pedal (9). .

尚、特許請求の範囲の項に図面との対照を便利にする為
に符号を記すか、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。
It should be noted that the present invention is not limited to the structure of the attached drawings by adding numerals in the claims for convenient comparison with the drawings.

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

図面は本発明に係る作業車の実施例を示し、第1図は変
速ペダルと制御装置との関係を示す概略図、第2図はブ
ツシュアームとブレーキペダルとの関係を示す概略図、
第3図は乗用芝刈機の全体側面図である。 (3)・・・・・・無段変速装置、(7)・・・・・・
連係機構、(9)・・・・・・変速ペダル、 (A)・
・・・・・電動アクチュエータ。
The drawings show an embodiment of a working vehicle according to the present invention, in which FIG. 1 is a schematic diagram showing the relationship between a gear shift pedal and a control device, and FIG. 2 is a schematic diagram showing the relationship between a bushing arm and a brake pedal.
FIG. 3 is an overall side view of the riding lawn mower. (3)...Continuously variable transmission, (7)...
Interlocking mechanism, (9)...speed change pedal, (A).
...Electric actuator.

Claims (1)

【特許請求の範囲】[Claims]  中立位置に復帰可能な変速ペダル(9)の踏込み操作
により前後方向に無段階に走行速度を変更可能な無段変
速装置(3)と、前記無段変速装置(3)を任意の前進
速度で固定並びに固定解除自在な速度固定装置とを備え
てある作業車において、前記速度固定装置を、前記ペダ
ル(9)又はペダルに連係の連係機構(7)に片当り接
当して前記変速ペダル(9)の中立位置への復帰を阻止
する電動アクチュエータ(A)から構成し、前記変速ペ
ダル(9)の操作位置を検出する検出手段、及び、前記
電動アクチュエータ(A)の作動位置を検出する手段、
並びに、前記両手段の検出結果を比較して、変速ペダル
操作位置に対応した位置まで前記電動アクチュエータ(
A)を駆動するアクチュエータ制御手段とからなる速度
固定手段を設けるとともに、前記変速ペダル(9)が任
意の操作位置にあるときのエンジンの回転数を記憶する
記憶手段、及び、エンジンの実回転数を検出する検出手
段、並びに、前記両手段の検出結果を比較して、その偏
差が設定範囲内に維持されるように前記電動アクチュエ
ータを駆動するアクチュエータ制御手段とからなる速度
調節手段を設け、さらに、速度固定手段作動状態と速度
調節手段作動状態とに択一的に切換える制御モード切換
手段を設けてある作業車。
a continuously variable transmission (3) capable of steplessly changing the traveling speed in the longitudinal direction by depressing a speed change pedal (9) capable of returning to a neutral position; In a work vehicle equipped with a speed fixing device that can be fixed and unfixed, the speed fixing device is brought into partial contact with the pedal (9) or a linkage mechanism (7) linked to the pedal, and the speed change pedal ( 9) detecting means for detecting the operating position of the shift pedal (9), comprising an electric actuator (A) that prevents the gear shift pedal (9) from returning to the neutral position; and means for detecting the operating position of the electric actuator (A). ,
Furthermore, the detection results of both means are compared, and the electric actuator (
A) is provided with a speed fixing means consisting of an actuator control means for driving the speed change pedal (9), a storage means for storing the number of revolutions of the engine when the speed change pedal (9) is at an arbitrary operating position, and an actual number of revolutions of the engine. and an actuator control means that compares the detection results of the two means and drives the electric actuator so that the deviation is maintained within a set range, and further A work vehicle is provided with control mode switching means for selectively switching between a speed fixing means operating state and a speed adjusting means operating state.
JP33455190A 1990-11-29 1990-11-29 Work car Pending JPH04197835A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP33455190A JPH04197835A (en) 1990-11-29 1990-11-29 Work car

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP33455190A JPH04197835A (en) 1990-11-29 1990-11-29 Work car

Publications (1)

Publication Number Publication Date
JPH04197835A true JPH04197835A (en) 1992-07-17

Family

ID=18278678

Family Applications (1)

Application Number Title Priority Date Filing Date
JP33455190A Pending JPH04197835A (en) 1990-11-29 1990-11-29 Work car

Country Status (1)

Country Link
JP (1) JPH04197835A (en)

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