JPS62163688U

JPS62163688U -

Info

Publication number: JPS62163688U
Application number: JP5198086U
Authority: JP
Priority date: 1986-04-07
Filing date: 1986-04-07
Publication date: 1987-10-17

Description

[Brief explanation of drawings]

第１図乃至第８図は本考案の実施例を示し、第
１図は第１実施例を示すセルフシールカツプリン
グの連結時を示す拡大縦断正面図、第２図は同実
施例の解除時の第１図相当図、第３図は農用トラ
クタの油圧系統図、第４図は農用トラクタの他の
形式を示す油圧系統図、第５図は第２実施例を示
す第１図相当図、第６図は第２実施例を示す第２
図相当図、第７図は第３実施例を示す第１図相当
図、第８図は第４実施例を示す第１図相当図、第
９図は従来例を示すカツプリング周辺の油圧系統
図である。１…油圧装置、２…油圧ポンプ、４…油圧ロー
ダの方向切換弁、５…圧送側セルフシールカツプ
リング、６…戻り側セルフシールカツプリング、
８…トラクタ側作業機の方向切換弁、１０…接続
具、１１…圧力ポート、１２…５の入口側エレメ
ント、１４…戻りポート、１５…６の出口側エレ
メント、１６…短絡路、１７…短絡用弁体、１８
…開弁手段、２０…閉弁具、２１…５の出口側エ
レメント、２２…６の入口側エレメント、Ｋ…開
弁位置方向、Ｈ…閉弁位置方向。 1 to 8 show embodiments of the present invention, FIG. 1 is an enlarged longitudinal sectional front view showing the first embodiment when the self-seal coupling is connected, and FIG. 2 is the same embodiment when it is released. Fig. 3 is a hydraulic system diagram of an agricultural tractor, Fig. 4 is a hydraulic system diagram showing another type of agricultural tractor, Fig. 5 is a diagram equivalent to Fig. 1 showing the second embodiment, FIG. 6 shows a second embodiment of the second embodiment.
Figure 7 is a diagram equivalent to Figure 1 showing the third embodiment, Figure 8 is a diagram equivalent to Figure 1 showing the fourth embodiment, and Figure 9 is a hydraulic system diagram around the coupling showing a conventional example. It is. DESCRIPTION OF SYMBOLS 1... Hydraulic device, 2... Hydraulic pump, 4... Hydraulic loader directional switching valve, 5... Self-sealing coupling on the feeding side, 6... Self-sealing coupling on the return side,
8... Directional switching valve of tractor side work equipment, 10... Connector, 11... Pressure port, 12... Inlet side element of 5, 14... Return port, 15... Outlet side element of 6, 16... Short circuit path, 17... Short circuit valve body, 18
...Valve opening means, 20...Valve closing tool, 21...5 outlet side elements, 22...6 inlet side elements, K...Valve opening position direction, H...Valve closing position direction.

Claims

[Scope of utility model registration request]

The directional switching valve 4 of the hydraulic loader can be separated from the hydraulic pump 2 of the hydraulic system 1 of the agricultural tractor by the self-sealing coupling 5 on the pumping side and the self-sealing coupling 6 on the return side, and the directional switching valve 8 of the working device on the tractor side can be separated. The connecting device 10 is connected in series with the agricultural tractor, and the pressure port 11 of the connecting device 10 is fixed to the agricultural tractor.
From a hydraulic system for an agricultural tractor, the inlet element 12 of the self-sealing coupling 5 on the pumping side is connected to the inlet side element 12 of the self-sealing coupling 5 on the pumping side, and the outlet element 15 of the self-sealing coupling 6 on the return side is connected to the return port 14 of the connecting device 10. In an oil passage connection device for extracting hydraulic pressure from a hydraulic loader, a pressure port 11 and a return port 14 are connected by a short circuit path 16 inside a connecting device 10, and this short circuit path 16 is connected to a short circuit valve body 17.
so that the short-circuit valve body 17 can be opened and closed by the valve opening means 18
The valve closing tool 20, which presses the short circuit valve body 17 toward the valve opening position K and moves the short circuit valve body 17 toward the valve closing position H against the valve opening means 18, is connected to the outlet side element 21 of the self-sealing coupling 5 on the feeding side. When the element attached to at least one side of the return side self-seal coupling ring 6 and the inlet side element 22 and which energizes the valve closing tool 20 is connected to the paired element, the valve closing tool 20 acts as a short-circuit valve. When the body 17 is moved to the valve closing position H to block the short-circuit path 16 and the element with the valve-closing tool 20 is separated from the paired element, the valve-opening means 18 opens the short-circuit valve body 17. An oil path connection device for taking out hydraulic pressure from a hydraulic system of an agricultural tractor to a hydraulic loader, characterized in that it is configured to open a short circuit path 16 by operating it toward the valve position side K.