公开(公告)号：FR2481872A1

公开(公告)日：1981-11-13

申请号：FR8109257

申请日：1981-05-08

Applicant: BOSCH GMBH ROBERT

Inventor： HOFER FRIEDRICH-WILHELM

IPC: A01D34/24 ,  A01B63/10 ,  A01D55/28 ,  B66F3/42 ,  F15B21/08

Abstract: The hydraulically-operated lifting mechanism is for use on a working vehicle e.g. a combine harvester or tractor. The fluid supply to an actuator is regulated by a controller, in turn governed by an adjustable desired-value emitter and an actual-value emitter. An extreme-value simulator can also be cut in as desired, to lift the table or plough into the travel position while turning on a headland. The simulator (19) acts at the setting unit (15) controlling the fluid supply to the actuator. The flow can be cut-off at the highest permissible position of the actuator.

公开(公告)号：DE3563094D1

公开(公告)日：1988-07-07

申请号：DE3563094

申请日：1985-06-04

Applicant: BOSCH GMBH ROBERT

Inventor： HOFER FRIEDRICH-WILHELM

IPC: F15B11/05

公开(公告)号：DE3363955D1

公开(公告)日：1986-07-10

申请号：DE3363955

申请日：1983-10-26

Applicant: BOSCH GMBH ROBERT

Inventor： HAUSER MANFRED ING GRAD ,  HOFER FRIEDRICH-WILHELM ,  KRAUS WALTER ,  SIEGEL HEINZ ING GRAD ,  ZIRPS WILHELM

IPC: F15B13/04 ,  F15B13/044

公开(公告)号：FR2482409A1

公开(公告)日：1981-11-20

申请号：FR8109781

申请日：1981-05-15

Applicant: BOSCH GMBH ROBERT

Inventor： HESSE HORST ,  HOFER FRIEDRICH-WILHELM ,  WEIGLE DIETER

IPC: A01D34/24 ,  A01B63/111 ,  F15B9/02 ,  F15B13/16

Abstract: A hydraulic control circuit is used to provide control of the motor of an actuator used on a tractor or thresher. The linear actuator (22) operates over a linkage (21) to move the plough or other tool to a required position. Feedback is provided for both the plough (X2) and for the actuator (X1). A simulator (13) responds to both the feedback signals and the setting of a manual lever (11) indicating required position. An output rod operates on an adjusting actuator (27) that receives force feedback (36) on the load and operates to offset a control unit (31) to regulate flow. A valve (41) is switched to pass flow from a pump (45) to the load. In the reset position flow is passed back to the tank.

公开(公告)号：GB1287705A

公开(公告)日：1972-09-06

申请号：GB32371

申请日：1971-01-04

Applicant: BOSCH GMBH ROBERT

Inventor： HOFER FRIEDRICH-WILHELM

IPC: F16K17/04

Abstract: 1287705 Valves ROBERT BOSCH GmbH 4 Jan 1971 [3 Sept 1970] 323/71 Heading F2V [Also in Division G3] A non-return valve, adapted to be positioned between a supply pressure control valve 33, 39 and a load 49, has a closure member 8 loaded by a spring 9 which has a movable abutment constituted by a piston 11. This piston is of greater diameter than the seat opening 3 and is subject to the pressure in a return line 18. It also has a stem 12 which positively holds the closure member 8 seated when the supply pressure control valve is in a neutral position as shown and wherein the supply pressure is by-passed through a return chamber 31. To raise the load piston 51, hand lever 69 is turned clockwise, moving control pilot valve 33 to the left through diamond shaped linkage member 66. This vents the interior of the pilot valve to drain through ports 35, 36 and return line 27. Piston control valve 39 moves to the left, cutting off the return through passage 42, 42 and chamber 31. Check valve 6 now opens to supply the load. A positional feedback from the load through control linkage 73, 71 and linkage member 66.returns the valve to neutral. When hand lever 69 is moved in the reverse direction to lower the load, a tappet 61 on the pilot valve opens a poppet valve 62 which connect the load cylinder with return chamber 31 through passage 56.