公开(公告)号：EP0817918B1

公开(公告)日：2000-05-10

申请号：EP96905853.6

申请日：1996-03-02

Applicant: Mannesmann Rexroth AG

Inventor： BIENER, Rainer ,  RAUSCHER, Richard ,  RÜB, Winfried

IPC: F15B13/043

CPC classification number: F15B13/0435 ,  Y10T29/49417 ,  Y10T137/86614 ,  Y10T137/87241

Abstract: In a hydraulically operable distributing valve, the control piston of which is controlled by electrically operable pre-control valves of small rated widths integrated into the distributing valve housing as built-in units in which the hydraulic connection between the pre-control valves and the distributing valve is via channels running in the distributing valve housing, the channels in the distributing valve housing, especially for large series production, take the form of cast-in channels and the connections of the pre-control valves are suited to the size and arrangement of said channels.

公开(公告)号：EP0861493B1

公开(公告)日：2000-04-19

申请号：EP96937253.1

申请日：1996-10-25

Applicant: Mannesmann Rexroth AG

Inventor： IMHOF, Rainer ,  WITTE, Torsten

IPC: H01F7/16

Abstract: The disclosure relates to a lifting magnet arrangement with thrust direction (1) in which a pressure spring (28) which biases the armature (16) into its base position can be set via an actuating section which is led outside the magnet housing. This design facilitates adjustment without opening the magnet housing, so that the adjustment process can be carried out with an oil-floated armature.

公开(公告)号：EP0935714A1

公开(公告)日：1999-08-18

申请号：EP97945768.0

申请日：1997-10-20

Applicant: Mannesmann Rexroth AG

Inventor： KNÖLL, Burkhard ,  RÜB, Winfried

IPC: F15B11 ,  F15B13

CPC classification number: F15B13/044 ,  F15B11/05 ,  F15B2211/30555 ,  F15B2211/3144 ,  F15B2211/327 ,  F15B2211/329 ,  F15B2211/35 ,  F15B2211/605 ,  Y10T137/86702 ,  Y10T137/87169

Abstract: The invention concerns a valve arrangement (1) for supplying, in a manner adapted to the pressure and volume flow, at least one consumer which, via two working connections (A1, B1, A2, B2) of a constantly adjustable directional control valve (4, 6), can be supplied with hydraulic fluid or connected to a tank (T). Associated with the two working connections (A1, B1, A2, B2) of the valve arrangement (1) is a common pressure balance (16, 18) whose piston (66) is guided in an axially displaceable manner in an axial bore (32) in the directional control valve slide (12) such that, when the directional control valve (4, 6) is suitably triggered, one of the two working connections (A1, B1, A2, B2) can be connected alternatively to the pump connection (P). A control pressure (25), which corresponds, for example, to the highest system load pressure, the individual load pressure or a pressure derived therefrom, acts on both end faces of the directional control valve slide (12) and on the spring side of the pressure balance piston (66).

公开(公告)号：EP0859717B1

公开(公告)日：1999-08-11

申请号：EP96932571.1

申请日：1996-09-19

Applicant: Mannesmann Rexroth AG

Inventor： DANTLGRABER, Jörg

IPC: B61F5/02 ,  B61F5/14

CPC classification number: B61F5/14 ,  B61F5/02

Abstract: The invention relates to a support for a vehicle body (11) on a chassis, especially a bogie (10) of a rail vehicle. A prior art support comprises a fluid-actuated piston-cylinder unit (60) fitted between the vehicle body (11) and the chassis (10) and a rocking stanchion (12) also fitted between the vehicle body (11) and the chassis (10) which comprises a first supporting component (13) and a second one (14) fitted between the first (13) and a vehicle component (10). Each supporting component (13, 14) has a break-away surface (31, 25, 16) bearing on another, where at least one break-away surface (31, 16) is cylindrical and the contact area between a pair of surfaces (31, 25, 16, 17) is linear. It is the aim of the invention to design such a support in such a way that it requires little space and in particular the distance between the vehicle body (11) and the chassis (10) can be very small. This is attained in that at least one of the two supporting components (13, 14) is annular, the piston-cylinder unit (60) is fitted inside the at least one annular supporting component (14) and the cylinder (61) of the piston-cylinder unit (60) has an outer flange (64) with a break-away surface (17) on which bears one (16) of the break-away surfaces of the annular supporting component (14), and the piston (62) of the piston-cylinder unit (60) bears on another component (10).

公开(公告)号：EP0836559B1

公开(公告)日：1999-08-04

申请号：EP96919699.7

申请日：1996-05-07

Applicant: Mannesmann Rexroth AG

Inventor： MIES, Hubertus

IPC: B60K41/26 ,  B60T11/10 ,  B60T13/14

CPC classification number: B60T11/103 ,  B60T13/141 ,  B60W10/103 ,  B60W10/18 ,  B60W30/18063 ,  B60W2300/12 ,  B60W2540/12

Abstract: The invention concerns an inching and braking system for a hydraulically operated apparatus with a braking system (116) and a drive system (102), wherein the drive system (102) and the braking system (116) can be controlled by actuation of the inching and braking system in order to produce a braking effect. According to the invention, an inching valve arrangement (4) and a brake valve arrangement (2) are mechanically coupled to one another such that the apparatus can be controlled more sensitively during transition from inching to braking.

公开(公告)号：EP0817730B1

公开(公告)日：1999-06-23

申请号：EP96902236.7

申请日：1996-02-16

Applicant: Mannesmann Rexroth AG

Inventor： MIES, Hubertus

IPC: B60K41/26 ,  B60T13/58 ,  G05G5/03

CPC classification number: G05G5/03 ,  B60T13/58 ,  B60W10/06 ,  B60W10/18 ,  B60W30/18063 ,  B60W2300/12 ,  B60W2540/12 ,  B60W2710/182

Abstract: Disclosed is an inching brake system for a working device, in particular a utility vehicle such as a wheeled loader, the brake system having a drive unit (50, 102), a brake unit (110, 103) and an actuator (2, 24), the drive unit (50, 102) and the brake unit (110, 103) being controlled, using the actuator (2, 24) to decelerate the vehicle. This deceleration is produced in a first zone (I) initially by appropriate control of the drive unit (50, 102) and in a second zone (II) jointly by the drive unit (50, 102) and the brake unit (110, 103). In order to make the two zones recognizable on the actuator (2, 24) to the operator, the brake system is fitted with a pressure-point device (12) by means of which one or more pressure points can be simulated which indicate the transition to the different braking zones (I, II).

公开(公告)号：EP0759109B1

公开(公告)日：1999-01-13

申请号：EP95917954.0

申请日：1995-04-25

Applicant: Mannesmann Rexroth AG

Inventor： Harnischfeger, Edwin

IPC: E02F9/22

CPC classification number: E02F9/2267 ,  E02F9/2207 ,  E02F9/2217 ,  E02F9/2271

Abstract: The invention starts from a hydraulic system for a mobile machine, in particular a wheel loader, the hydraulic system being equipped with the "longitudinal oscillation damping" function. In accordance with a known hydraulic system of this type, the hydraulic system according to the invention has at least one hydraulic cylinder (13) with which a tool can be operated and whose inner space is divided by a piston (15) into two pressure chambers (17, 18); a stop valve (12) which connects one of the two pressure chambers (17, 18) to a hydraulic reservoir (42) which can be filled via a filling pipe; and a distributing valve (11) with a spool valve (40) for the separate pressurization of the two pressure chambers (17, 18) in the hydraulic cylinder (13) and/or for connecting them to a tank (29). To facilitate low-cost and space-saving construction of a system of this type, the stop valve is incorporated in the distributing valve (11) in such a way that the hydraulic reservoir (42) and the first pressure chamber (17) of the hydraulic cylinder (13) can be connected to each other via the spool valve (40) of the distributing valve (11).

公开(公告)号：EP0850364A1

公开(公告)日：1998-07-01

申请号：EP96931065.0

申请日：1996-09-10

Applicant: Mannesmann Rexroth AG

Inventor： SCHEIDL, Rudolf ,  RIHA, Gerald ,  GARSTENAUER, Michael ,  GRAMMER, Siegfried

IPC: F15B21

CPC classification number: F15B21/125

Abstract: The invention concerns a device for controlling a hydrostatic drive (1), said device comprising a resonator (2) which is connected on one side to the hydrostatic drive (1) and on the other side to a pressure medium supply line (4) and a return line (5). The device also comprises a pilot valve (3) which can be actuated periodically and connects the resonator (2) alternately to the pressure medium supply line (4) and the return line (5). In order to ensure that control conditions are advantageous, the resonator (2) comprises at least one pressure chamber (6) with a movable chamber-delimiting system (7) which can oscillate in order to vary the volume of the chamber. The movable chamber-delimiting system (7) forms part of a single-mass oscillator consisting of a mass and a spring (10) or itself forms such a single-mass oscillator. The pressure chamber (6), which can be connected alternately to the pressure medium supply line (4), the return line (5) and the hydrostatic drive (1), can be acted upon via the pilot valve (3) at a switching frequency lying in the super-resonance range of the single-mass oscillator.

公开(公告)号：EP1264110A1

公开(公告)日：2002-12-11

申请号：EP01903765.4

申请日：2001-02-14

Applicant: Mannesmann Rexroth AG

Inventor： KÖCKEMANN, Albert

IPC: F15B21/08

CPC classification number: F15B21/08 ,  F15B2013/0409

Abstract: The aim of the invention is to control the flow of pressure means to and from a hydraulic actuator (22). A device comprising a valve (11) that is actuated electrically and a control device (15) that is used for the position of the valve piston and is integrated in the housing of the valve or is held on said housing and in a housing of said control device (15) is provided. The aim of the invention is to be able to use such devices in control and regulating systems in a cost-effective manner, whereby said systems have several electrohydraulic drives. A control device for a variable that is representative for the movement of the actuator and an electronic control device (27) for the sequence of motion of the actuator are arranged in the same housing (2) as the control device that is used for the position of the valve piston. Such devices are used in all fields where electrohydraulic drives are controlled, in machine tools for instance.

公开(公告)号：EP0901577B1

公开(公告)日：2002-10-30

申请号：EP97927118.6

申请日：1997-06-03

Applicant: Mannesmann Rexroth AG

Inventor： BÜTTNER, Peter ,  JELITTE, Lucia ,  STAHL, Konrad

IPC: F15B13/042

CPC classification number: F15B13/0422 ,  Y10T137/86702 ,  Y10T137/87064

Abstract: The invention relates to a manually operable hydraulic pilot control with a continuously adjustable pressure reducing valve (9), having a housing (10) and, in a through drilling (11) therein, an adjusting piston (50). This piston can be biased by a control spring (61) to allow a connection between a pressure inlet (P) and a control outlet (A) and can be biased by a pressure applied in the control outlet (A) to prevent this connection. The control spring (61) is tensioned between a first fixed stop (59) on the control piston (50) and a spring washer (56) which can be applied to a second fixed stop (54) on the control piston (50) and can be conveyed by an axially guided pushrod (14) at a first open end of the housing drilling (11) and supported at a distance from the second stop (54) on the control piston (50). In order to be able to adjust the free travel until the initial jump in the control pressure, the control piston (50) can be moved in a control sleeve (20) fitted in the housing drilling (11), the axial position of which is adjustable from the second open end of the housing drilling (11). An adjusting spring (62) tensioned between the control piston (50) and an adjustable stop (45) integral with the housing makes it possible to adjust the extent of the pressure jump.