公开(公告)号：EP0335939A1

公开(公告)日：1989-10-11

申请号：EP88908928.0

申请日：1988-10-15

申请人： Schulze, Eckehart

发明人： Schulze, Eckehart

IPC分类号： B26F1 ,  B21D28 ,  B23Q5 ,  B30B15 ,  F15B11

CPC分类号： B21D28/002 ,  B30B15/16

摘要： A hydraulic drive system for a punching or an embossing tool comprises a double-acting hydraulic drive cylinder with piston surfaces of various sizes. The fast feed, working feed and fast retrun are controlled by the joint or alternating application of pressure by the piston surfaces. For this purpose, a surface-switching valve switches over from differential drive to unilateral application of pressure to the largest drive surfaces when the drive pressure exceeds, for example, 90 % of the maximum output pressure of the supply aggregate. The surface-switching valve comprises a nonreturn valve which is acted on in the direction of opening by the working pressure prevailing in the smallest drive pressure chamber. The elastic closing force of the nonreturn valve is equivalent to an opening pressure equal to approximately 90 % of the supply pressure. The surface-switching valve comprises a hydraulic slide valve with a valve body in the form of a differential piston which the body of the nonreturn valve. When the nonreturn valve is closed, the pressure acts on the smallest drive pressure chamber and the pressure prevailing in the largest drive pressure chamber acts on the largest step of the differential piston. The ratio of the surface area of the largest step of the piston to the area covered by the seat of the nonreturn valve seat is geater than the ratio of the largest to the smallest surface area of the piston of the hydraulic cylinder.

摘要翻译： 在包括冲压或压印工具具有各种尺寸的活塞表面上的双作用液压驱动缸的液压驱动装置。 几乎饲料，饲料加工和快速retrun通过由活塞表面的压力的联合或交替应用程序控制。 为了这个目的，一个表面切换阀从差分驱动的压力单方面应用到大最大驱动面，当驱动压力超过例如切换，90％的供应聚集体的最大输出压力的。 表面切换阀包括止回阀所有其在由所述工作压力在最小的驱动压力室中存在开口的方向起作用。 止回阀的弹性关闭力等效于在压力等于供给压力的大约90％的开口。 表面切换阀包括具有阀体的液压滑阀在一差动活塞的形式，该单向阀的主体。 当止回阀关闭时，压力作用于最小的驱动压力室和压力在大最大驱动压力室作用在差动活塞的较大的最大步骤盛行。 活塞通过止回阀座椅的座椅覆盖的区域的最大大台阶的表面面积的比率是大于Geater的最大大到液压缸的活塞的最小表面积的比率。

公开(公告)号：EP0279837A1

公开(公告)日：1988-08-31

申请号：EP87905716.0

申请日：1987-09-04

申请人： Schulze, Eckehart

发明人： Schulze, Eckehart

IPC分类号： F15B9

CPC分类号： F15B9/12

摘要： Une soupape de régulation hydraulique (10) de marche à vide comporte au moins deux soupapes d'écoulement (21, 22) à actionnement mécanique, qui peuvent être commandées en alternance dans une position d'écoulement et une position de fermeture et sont toutes deux fermées dans une position médiane centrale, un système électromécanique de prédéfinition de la valeur de consigne pour la position du piston d'un vérin hydraulique d'entraînement (14), lequel système comprend un arbre creux dont la vitesse de rotation est réglable en corrélation avec la valeur de consigne. Il est également prévu un système de rappel de la valeur réelle, comprenant un axe de rappel engrènant avec un filet intérieur de l'arbre creux, lequel axe exécute un nombre de rotations en corrélation avec les mouvements du piston. L'organe d'actionnement de la soupape subit les mêmes translations que l'arbre de prédéfinition de la valeur de consigne. Le carter (33) possède un noyau (48) cylindrique circulaire avec un premier alésage longitudinal (31) dans lequel sont agencés les pistons d'une paire de soupapes déplaçables entre des éléments de butée (37,38) déplaçables longitudinalement, et avec un autre alésage dans lequel l'arbre creux est monté rotatif et déplaçable, les éléments de butée étant supportés axialement et radialement sur des coussinets de pivotement ménagés sur l'arbre creux. Le carter présente une enveloppe (49) circulaire cylindrique. Les espaces de raccordement côté sources de pression et côté consommateurs sont délimités par des rainures extérieures du noyau cylindrique, et les canaux d'admission et de sortie par des alésages radiaux du noyau et de l'enveloppe.

公开(公告)号：EP0853731A2

公开(公告)日：1998-07-22

申请号：EP96933364.0

申请日：1996-09-24

申请人： Schulze, Eckehart

发明人： Schulze, Eckehart

IPC分类号： F15B13 ,  F15B9 ,  F16K3 ,  F16K31

CPC分类号： F15B13/0435 ,  F15B9/10 ,  Y10T137/86606 ,  Y10T137/86614

摘要： The invention concerns an electrohydraulic control valve arrangement (10) for controlling the movement of a hydraulic motor. The control valve arrangement (10) comprises a main control valve (11), which can be actuated by the alternating application and relieving of pressure in two control chambers, and an electrohydraulic servo-control valve (14) which operates with electronically controllable position setpoint input and mechanical actual position data feedback in order to pilot the main control valve accordingly in a manner guided by the setpoint value. The servo-control valve (14) comprises a sleeve-shaped housing element (99) which is disposed so as to be movable in a pressure-tight manner in a connection block (114) rigidly connected to the housing of the main control valve (11). The servo-control valve (14) further comprises a piston (66) which is likewise disposed so as to be movable in a pressure-tight manner in the sleeve-shaped housing element and can be driven in alternate directions by means of a controllable electric motor (131) in order to perform incremental deflections with respect to the sleeve-shaped housing element (99) for inputting the position setpoint. The housing element (99) is coupled for movement in a positive and force-locking manner to the piston (16) of the main control valve (11). The servo-control valve (14) is provided with a valve spring arrangement (118, 119) which, in the non-controlled state of the setpoint input motor (131), sets the piston (66) in the setpoint input position associated with the operationally-neutral centre position of the main control valve (11).

公开(公告)号：EP0835382A1

公开(公告)日：1998-04-15

申请号：EP96923960.0

申请日：1996-06-27

申请人： Schulze, Eckehart

发明人： Schulze, Eckehart

IPC分类号： F04C2 ,  F04C14

CPC分类号： F04C14/04 ,  F04C2/104 ,  F04C2/106

摘要： The invention concerns an electrohydraulic control arrangement (12) for a rotary hydraulic motor which takes the form of a gear-within-gear motor (11) whose rotor (14) performs two superimposed rotational movements, of which one is eccentric to the central longitudinal axis (19) of the stator (17) and the other is a rotation about the central rotor longitudinal axis (16) and in turn thereby performs a rotational movement about the central longitudinal axis of the stator along a circular path. In order to convert the rotational movements of the rotor (14) into a uniaxial rotational movement of the output shaft (36) of the motor (11), a universal joint shaft (34) which couples the output shaft to the rotor is provided. In order to control the drive, a follow-up regulating valve (39) in the form of a rotary slide valve is provided which operates such that a nominal value of the rotor position is selected under the electrical control of a stepping motor (41), the actual value of the position of the rotor (14) being fed back mechanically via a feedback gear (58) which is adjusted without play and takes the form of a hypotrochoid gear. A sensor element for detecting the actual position value takes the form of a valve piston (57) of the follow-up regulating valve (39). The feedback gear (58) couples the valve piston (57) for movement to the rotor of the gear-within-gear motor such that they rotate uniaxially.

公开(公告)号：EP0528923B1

公开(公告)日：1994-08-03

申请号：EP91909552.1

申请日：1991-05-14

申请人： Schulze, Eckehart

发明人： Schulze, Eckehart

IPC分类号： B62M19/00

CPC分类号： B62M19/00

摘要： A bicycle (10) has a hydraulic driving device with a hydraulic pump (13) rotatively driven by means of a pedal drive and a hydromotor (14) rotatably driven by means of the flow of hydraulic fluid delivered by the hydraulic pump and which drives the rear wheel (16) of the bicycle. The pump (13) is designed as an axial piston pump with at least eight pumping elements that work in a delivery mode at least thrice during each turn of the pump rotor. A speed selecting device designed as a valve control device is used to switch increasingly more or decreasingly less pumping elements, individually or in groups, into a rotating mode, with the exception of one pumping element that is permanently in the delivery mode. The bicycle (10) also has a hydraulic driving motor (18) for the front wheel (17) which can be driven by the pump (13).

公开(公告)号：EP0339247B1

公开(公告)日：1993-08-11

申请号：EP89104861.3

申请日：1989-03-18

申请人： Schulze, Eckehart

发明人： Schulze, Eckehart

IPC分类号： B21J9/12

CPC分类号： B21D28/002 ,  B21J9/20 ,  B30B15/16 ,  B30B15/161

公开(公告)号：EP0528923A1

公开(公告)日：1993-03-03

申请号：EP91909552.0

申请日：1991-05-14

申请人： Schulze, Eckehart

发明人： Schulze, Eckehart

IPC分类号： B62M19

CPC分类号： B62M19/00

摘要： Cycle (10) à commande hydraulique comprenant une pompe hydraulique (13) entraînée en rotation au moyen d'un pédalier, et un moteur hydraulique (14) entraînant la roue arrière (16) du cycle, entraîné lui-même en rotation par le flux de fluide sous pression refoulé par la pompe hydraulique, cycle dans lequel la pompe (13) est réalisée sous forme de pompe à piston axial comprenant au moins huit éléments de pompe, dont chacun fonctionne, pour une rotation du rotor de pompe, au moins trois fois en régime de refoulement. Il est prévu un dispositif sélecteur à étages de commutation, réalisé sous la forme d'un dispositif de commande de soupape, au moyen duquel, à l'exception d'un élément de pompe utilisé en permanence en régime de refoulement, les autres éléments de pompe sont enclenchables individuellement ou à plusieurs, en nombre croissant ou décroissant, en régime de rotation. Le cycle (10) est également équipé d'un moteur d'entraînement (18) de la roue avant (17), commandé par l'intermédiaire de la pompe (13).

公开(公告)号：EP0428574B1

公开(公告)日：1992-10-28

申请号：EP89908962.7

申请日：1989-08-09

申请人： Schulze, Eckehart

发明人： Schulze, Eckehart

IPC分类号： F03C1/06

CPC分类号： F03C1/0676 ,  F03C1/0671

摘要： The rotor (18) of an axial piston engine (10) is connected to the engine shaft (16) so as to remain fixed during rotation and during sliding and is supported on the engine housing (91) without play in the axial direction. The cross-sections of control passages (96) alternatively overlap with the control chambers (99) of the engine housing (91), which are put under pressure or relieved of pressure, thus causing the driving pressure chambers (37) of the rotor (18) to be alternately pressurized and depressurized. Said control channels (96) are arranged on a control disk (88), which is linked in a rotationally fixed manner with the driving part (19) of the rotor (18) that delimits the driving pressure chambers (37) but can for compensation sway or be axially shifted relative to said part. Said control disk (88) has a metallic sealing surface (118), inside which the outlet openings (98) of its control channels (96) are situated, and with which it slidingly and sealingly rests against a sealing surface situated on the housing side, inside which the outlet openings (98) of the control chambers (99) are situated. Said control disk is forced to rest against the sealing surface (114), situated on the housing side, by elastic sealing elements (34), which ensure the sealing contact of the driving pressure chambers (37) with the housing chamber containing the rotor (18), whereby said sealing elements (34) are thus strongly pre-loaded in the axial direction.