JPH0157927U - - Google Patents

Info

Publication number
JPH0157927U
JPH0157927U JP15353987U JP15353987U JPH0157927U JP H0157927 U JPH0157927 U JP H0157927U JP 15353987 U JP15353987 U JP 15353987U JP 15353987 U JP15353987 U JP 15353987U JP H0157927 U JPH0157927 U JP H0157927U
Authority
JP
Japan
Prior art keywords
speed
low speed
switching device
low
wheel drive
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
JP15353987U
Other languages
Japanese (ja)
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 filed Critical
Priority to JP15353987U priority Critical patent/JPH0157927U/ja
Publication of JPH0157927U publication Critical patent/JPH0157927U/ja
Pending legal-status Critical Current

Links

Description

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

第１図は本考案の一実施例を示す説明図、第２
図は本考案とは別の作業機昇降用油圧装置の落下
防止装置を示す説明図である。 ７……後輪、１１……高低速切換装置、１９…
…前輪、２０……油圧制御弁、３５……モニター
（検出器）、３６……設定器、３７……比較器、
３８……制御器。 Fig. 1 is an explanatory diagram showing one embodiment of the present invention;
The figure is an explanatory view showing a fall prevention device for a hydraulic system for lifting and lowering a working machine, which is different from the present invention. 7... Rear wheel, 11... High/low speed switching device, 19...
...front wheel, 20...hydraulic control valve, 35...monitor (detector), 36...setting device, 37...comparator,
38...Controller.

Claims (1)

【実用新案登録請求の範囲】 前輪駆動系に高低速切換装置１１が備えられ、
高低速切換装置１１が、中立体勢と、前輪１９の
周速を後輪７の周速と略同じとする低速体勢と、
前輪１９の周速を後輪７の周速の約２倍とする高
速体勢とに切換自在とされたものにおいて、 走行速度を検出する検出器３５と、高低速切換
装置１１の高速体勢時に検出した走行速度が第１
設定速度を越えた場合に高低速切換装置１１を低
速体勢とし且つ高低速切換装置１１の低速体勢時
に検出した走行速度が第２設定速度を越えた場合
に高低速切換装置１１を中立体勢とする制御手段
が備えられ、第２設定速度が第１設定速度よりも
高速とされたことを特徴とする四輪駆動トラクタ
の前輪駆動制御装置。[Claims for Utility Model Registration] A front wheel drive system is equipped with a high/low speed switching device 11,
The high/low speed switching device 11 has a neutral position and a low speed position in which the circumferential speed of the front wheels 19 is approximately the same as the circumferential speed of the rear wheels 7,
In a device that can freely switch between a high-speed position and a high-speed position in which the circumferential speed of the front wheels 19 is approximately twice that of the rear wheels 7, a detector 35 that detects the running speed and a high-low speed switching device 11 detect when the high-speed position is in place. The running speed is the first
When the set speed is exceeded, the high/low speed switching device 11 is set to a low speed position, and when the traveling speed detected when the high/low speed switching device 11 is in the low speed position exceeds a second set speed, the high/low speed switching device 11 is set to a neutral position. 1. A front wheel drive control device for a four-wheel drive tractor, comprising a control means, wherein the second set speed is higher than the first set speed.
JP15353987U 1987-10-07 1987-10-07 Pending JPH0157927U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15353987U JPH0157927U (en) 1987-10-07 1987-10-07

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15353987U JPH0157927U (en) 1987-10-07 1987-10-07

Publications (1)

Publication Number Publication Date
JPH0157927U true JPH0157927U (en) 1989-04-11

Family

ID=31429470

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15353987U Pending JPH0157927U (en) 1987-10-07 1987-10-07

Country Status (1)

Country Link
JP (1) JPH0157927U (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59176121A (en) * 1983-03-24 1984-10-05 Kubota Ltd Front wheel drive control unit for 4-wheel-drive car
JPS6234821A (en) * 1985-08-06 1987-02-14 Kubota Ltd Four wheel drive type tractor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59176121A (en) * 1983-03-24 1984-10-05 Kubota Ltd Front wheel drive control unit for 4-wheel-drive car
JPS6234821A (en) * 1985-08-06 1987-02-14 Kubota Ltd Four wheel drive type tractor

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