公开(公告)号：EP4148014A1

公开(公告)日：2023-03-15

申请号：EP22193809.5

申请日：2022-09-05

Applicant: Robert Bosch GmbH

Inventor： Pedrazzi, Alberto ,  Zaccarelli, Pierre Luigi

IPC: B66C23/00 ,  B66C23/70 ,  E02F9/22 ,  F15B11/05 ,  B66F9/22

Abstract: The present invention regards a device for controlling a displacement of a load, comprising:
a first conduit (20), configured so as to be able to connect a first chamber (C1) of a cylinder (C) with a distributor (D); a second conduit (30), configured so as to be able to connect a second chamber (C2) of the cylinder (C) with the distributor (D);
a first valve (6), arranged along the first conduit (20), which is configured so as to be able to allow the flow of fluid from the distributor (D) to the first chamber (C1) and to prevent the flow of fluid from the first chamber (C1) towards the distributor (D);
a second valve (1), arranged along the second conduit (30), which is arranged to assume a closed configuration, in which it prevents the flow of fluid along the second conduit (30), and an opening configuration, in which it allows the flow of fluid along the second conduit (30), only if piloted by a pilot pressure higher than a predetermined value;
a pilot conduit (40), which connects the second valve (1) with the first conduit (20) and configured so as to allow a pilot pressure to reach said second valve (1);
wherein said device further comprises a third conduit (50) which connects a portion of said pilot conduit (40) to a portion of said second conduit (30) comprised between said second valve (1) and said second chamber (C2) and by the fact that along said third conduit (50) is positioned a third valve (11), which is configured so as to allow a flow of fluid from said first conduit (20) to said second conduit (30) and to prevent the opposite flow and a first orifice (8) positioned along said third conduit (50) between said third valve (11) and said pilot conduit (40).

公开(公告)号：EP4001668A1

公开(公告)日：2022-05-25

申请号：EP21208158.2

申请日：2021-11-15

Applicant: Robert Bosch GmbH

Inventor： Pedrazzi, Alberto

IPC: F15B11/20

Abstract: The present invention regards a device for sequential operation of two or more cylinders, comprising:
a first conduit (2), provided with a first branch (21), designed to be connected to a chamber of a first cylinder (10), and a second branch (22), designed to be connected to a chamber of a second cylinder (10);
a second conduit (3), provided with a first branch (31), designed to be connected to the other chamber of the first cylinder (10), and a second branch (32), designed to be connected to the other chamber of the second cylinder (11);
a first control valve (4), arranged along the second branch (22) of the first conduit (2), which is movable between an opening configuration, in which it allows flow along the second branch (22) of the first conduit (2), and a closing configuration, in which it prevents the flow along the second branch (22) of the first conduit (2);
an adjustment element (53), arranged along the first branch (31) of the second conduit (3), which is configured in such a way so as to allow an exhaust flow from the other chamber of said first cylinder (10) towards said second conduit (3) if the pressure in said other chamber of said first cylinder (10) exceeds a predetermined value and to prevent flow in the opposite direction;
a control valve (52), preferably a check valve, which is positioned parallel to said regulating element (53) and is configured so as to allow a flow towards said other chamber of said first cylinder (10) in case the pressure in said first branch (31) in the portion facing said other chamber of said first cylinder (10) is lower than the pressure in the remaining part of said first branch (31) and to prevent the flow in the opposite direction;
a first pilot conduit (41), which connects the first control valve (4) and the first branch (31) of the second conduit (3) at an intermediate point between the connection to the first cylinder (10) and the adjustment element (53), and pilots the control valve (4) towards the closed configuration.

公开(公告)号：EP4464901A1

公开(公告)日：2024-11-20

申请号：EP24175624.6

申请日：2024-05-14

Applicant: Robert Bosch GmbH

Inventor： Pedrazzi, Alberto ,  Zaccarelli, Pierre Luigi

IPC: F15B11/024

Abstract: The present invention relates to a Method for adjusting an actuator cylinder (10) of an operating machine, said actuator cylinder having a first and a second chamber (11, 12), a piston (13) separating said first chamber (11) from said second chamber (12) configured to move an element, said system comprising a first feed conduit (20) of said first chamber (11) of said cylinder (10), a second feed conduit (21) of said second chamber (12) of said cylinder (10), wherein said first feed conduit (20) and said second feed conduit (21) are connectable to a distribution valve (100) configured to control a feed operation and a discharge operation of said first feed conduit (20) and said second feed conduit (21), wherein said first supply conduit (20) is connected to said second supply conduit (21) by means of a regeneration conduit (22) configured to allow a flow of fluid from said second chamber (12) to said first chamber (11) via said first and said second supply conduit (20, 21), said method being characterized by the fact that the flow along said regeneration conduit (22) is regulated on the basis of the flow rate of fluid from said distribution valve (100) and directed to said first chamber (11) via said first supply conduit (20) or a quantity dependent thereon.

公开(公告)号：EP4047217A1

公开(公告)日：2022-08-24

申请号：EP22157672.1

申请日：2022-02-21

Applicant: Robert Bosch GmbH

Inventor： Pedrazzi, Alberto ,  Zaccarelli, Pierre Luigi

IPC: F15B11/20

Abstract: The present invention relates to a device for operating two or more cylinders, comprising: a first conduit (2), provided with a first branch (21), arranged to be connected to a first chamber of a first cylinder (10), and a second branch (22), arranged to be connected to a first chamber of a second cylinder (11); a second conduit (3), provided with a first branch (31), arranged to be connected to a second chamber of the first cylinder (10), and a second branch (32), arranged to be connected to a second chamber of the second cylinder (11); a first control valve (4), disposed along the second branch (22) of the first conduit (2), which is movable between an opening configuration, in which it allows flow along the second branch (22) of the first conduit (2), and a closing configuration, in which it prevents flow along the second branch (22) of the first conduit (2); a control system (100) disposed along said first branch (21) of said first conduit (2), comprising a second control valve (101) which is movable between an opening configuration, in which it allows flow along said first branch (21) of said first conduit (2) from said first conduit (2) to said first chamber of said first cylinder (10), and a closing configuration, in which it prevents flow along said first branch (21) of said first conduit (2); said control system (100) further comprising discharge means (102, 103) configured to allow discharge from said first chamber of said first cylinder (10) to said first conduit (2) as a result of a pressure in said second conduit (3) or as a result of a magnitude therefrom.

公开(公告)号：EP3862576A1

公开(公告)日：2021-08-11

申请号：EP21155350.8

申请日：2021-02-05

Applicant: Robert Bosch GmbH

Inventor： Zaccarelli, Pierre Luigi ,  Pedrazzi, Alberto

IPC: F15B11/00 ,  F15B11/04 ,  B66F9/22

Abstract: The present invention regards a control system (1000) for an actuator cylinder (10) having a first and a second chamber (11, 12), a piston (13) separating said first chamber (11) from said second chamber (12), said system (1000) comprising: a first supply conduit (20) of said first chamber (11) of said cylinder (10); a second supply conduit (21, 22) of said second chamber (12) of said cylinder (10); wherein said first supply conduit (20) and said second supply conduit (21, 22) are connectable to a distribution valve (100) configured to control a feed operation and a discharge operation of said first supply conduit (20) and said second supply conduit (21, 22); a first check system (30) positioned along said second supply conduit (21) and configured to open a passage for a fluid coming from said distribution valve (100) and directed towards said second chamber (12) if the pressure difference between the pressure of said fluid coming from said distribution valve (100) and the pressure in said second chamber (12) exceeds a first predetermined value, and wherein said first check system (30) is connected to said first supply conduit (20) by means of a first pilot conduit (201), wherein said first check system (30) is configured to open a passage for a fluid coming from said second chamber (12) and directed to said distribution valve (100) when the pressure in said first pilot conduit (201) at said first check system (30) reaches a first predetermined value; said second supply conduit (21) comprises a primary branch (21) along which said first check system (30) is positioned, and a secondary branch (22) parallel to said primary branch (21) and along which a second check system (40, 50) is positioned, wherein said second check system (40, 50) is configured to allow to open a passage for a fluid coming from said distribution valve (100) and directed towards said second chamber (12) along said secondary branch (22) if the pressure difference between the pressure of said fluid coming from said distribution valve (100) and the pressure in said second chamber (12) exceeds a second predetermined value, wherein said first and said second check systems (30, 40, 50) are dimensioned in such a way that a maximum fluid flow which can pass through said second check system (40, 50) is at least twice as large as a maximum fluid flow which can pass through said first check system (30).