JPS6074503U

JPS6074503U - Tractor plowing depth control device

Info

Publication number: JPS6074503U
Application number: JP16577783U
Authority: JP
Inventors: 大橋　庄次; 椎山　秀雄; 隆鈴木; 通生田井
Original assignee: 株式会社クボタ
Priority date: 1983-10-26
Filing date: 1983-10-26
Publication date: 1985-05-25

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of drawings]

図面は本考案に係るトラクタの耕深制御装置の実施例を
示し、第１図はトラクタ後部の側面図、第２図はフィー
ドバック式リンク機構の斜視図、第３図イ９口、ハは昇
降用操作部の側面図、第４図は同部の平面図、第５図は
同部の正面図である。３・・・・・・昇降用油圧シリンダ、７・・・・・・制
御バルブ、８・・・・・・バルブ操作用回転軸、１５ａ
・・・・・・揺動アーム、２０・・・・・・ポジション
コントロールレバー、２６・・・・・・第１スプリング
、２８・・・・・・第２スプリング、Ｂ・・・・・・耕
耘装置。第２図４（イ）　−ｎ　−The drawings show an embodiment of the plowing depth control device for a tractor according to the present invention, in which Fig. 1 is a side view of the rear part of the tractor, Fig. 2 is a perspective view of the feedback type link mechanism, and Fig. 3 A9 and C are elevations. 4 is a plan view of the same part, and FIG. 5 is a front view of the same part. 3...Hydraulic cylinder for lifting/lowering, 7...Control valve, 8...Rotary shaft for valve operation, 15a
... Swing arm, 20 ... Position control lever, 26 ... First spring, 28 ... Second spring, B ...... Tillage equipment. Figure 2 4 (a) -n -

Claims

[Scope of utility model registration request]

The operating rotary shaft 8 for the control valve 7 of the hydraulic cylinder 3 for raising and lowering the tiller is connected to the control valve 7 via a feedback link mechanism in order to automatically raise and lower the tiller B to a height set at its rotational position. A first spring 26 that is linked and urges the rotating shaft 8 downward is provided to act on the swinging arm 15a that rotates integrally with the rotating shaft 8, and locks the swinging arm 15a on the rising side. A soil sensor 37 for detecting tillage depth is provided with a slough control lever 20 to be operated and is attached to the tillage device B so as to be able to be raised and lowered.
is a tractor connected to the swing arm 15a through a mechanical linkage mechanism so as to operate the swing arm 15a to maintain the set plowing depth when the position control lever 20 is in the unlocked state. In the plowing depth control device, a second spring 28 that acts on the swing arm 15a to bias the rotary shaft 8 downward is deformed as the swing arm 15a swings by a unit amount. A tillage depth control device for a tractor, wherein the plowing depth is maximized when the swing arm 15a is swung near the maximum raised position.゛