Double hydraulic machine with a distribution valve and a driving system comprising such a hydraulic machine

Patent metadata

Field	Value
Publication number	US-9404485-B2
Application number	US-201414178194-A
Country	US
Kind code	B2
Filing date	Feb 11, 2014
Priority date	Feb 12, 2013
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

The present invention relates to a double hydraulic machine ( 100 ) comprising two elementary machines (M 1 , M 2 ) each having two orifices, the double hydraulic machine ( 100 ) comprising a distribution valve ( 7 ) suitable for, in a first configuration (C 1 ), feeding both elementary machines (M 1 , M 2 ) in parallel, and in a second configuration (C 2 ), producing a short circuit of one of the elementary machines (M 2 ). The invention also relates to a system for driving a vehicle comprising such a hydraulic machine ( 100 ) for driving the vehicle into motion.

First claim

The invention claimed is:

1. A double hydraulic machine ( 100 ) with two operating cylinder capacities, comprising a case, a distributor ( 5 , 6 ) a cylinder block ( 3 ) provided with a plurality of pistons ( 31 ) positioned facing a cam ( 4 ),
said plurality of pistons ( 31 ) forming two disconnected sub-assemblies thus defining a first (M 1 ) and a second (M 2 ) elementary hydraulic machine selectively fed by the distributor ( 5 , 6 ) each having a first orifice (A 1 , A 2 ) and a second orifice (R 1 , R 2 ) made in the distributor ( 5 , 6 ),
the double hydraulic machine ( 100 ) having three orifices ( 81 , 82 , 83 ) suitable for being connected to the first orifice (A 1 , A 2 ) and to the second orifice (R 1 , R 2 ) of the elementary hydraulic machines (M 1 , M 2 ),
characterized in that it further comprises a distribution valve ( 7 ) connecting said three orifices ( 81 , 82 , 83 ) of the hydraulic machine ( 100 ) to a distributor ( 5 , 6 ), said distribution valve ( 7 ) may alternate between two configurations (C 1 , C 2 ) and is configured for,
in a first configuration, connecting the second orifice of the first elementary machine (M 1 ) and of the second elementary machine (M 2 ) to a first orifice ( 81 ) of the double hydraulic machine ( 100 ), and connecting the first orifice (A 1 ) of the first elementary machine (M 1 ) to a third orifice ( 83 ) of the double hydraulic machine ( 100 ) and the first orifice (A 2 ) of the second elementary machine (M 2 ) of the double hydraulic machine ( 100 ) to a second orifice ( 82 ) of the double hydraulic machine ( 100 ), and
in a second configuration, connecting the second orifice (R 1 ) of the first elementary machine (M 1 ) to the first orifice ( 81 ) of the double hydraulic machine ( 100 ), and connecting the first orifice (A 1 ) of the first elementary machine (M 1 ) as well as the first (A 2 ) and the second (R 2 ) orifice of the second elementary machine (M 2 ) both to the second orifice ( 82 ) and to the third orifice ( 83 ) of the double hydraulic machine ( 100 ).

2. The double hydraulic machine ( 100 ) according to claim 1 , wherein
the distributor ( 5 , 6 ), the case and the cam ( 4 ) of the hydraulic machine are fixedly mounted in rotation,
the cylinder block ( 3 ) is rotatably mounted,
the distributor ( 5 , 6 ) comprises a valving ( 5 ) and a valving cover ( 6 ), said distribution valve ( 7 ) being slideably mounted in said valving cover ( 6 ).

3. A system for driving displacement units of a vehicle, comprising:
a hydraulic pump ( 110 ) having a first orifice ( 111 ) and a second orifice ( 112 ),
a first double hydraulic motor ( 100 ) with two operating cylinder capacities according to one of claim 1 or 2 driving into rotation a first displacement unit of the vehicle,
second ( 120 ) and third ( 130 ) hydraulic motors each driving a displacement unit of the vehicle and each having a first ( 141 , 151 ) and second ( 142 , 152 ) orifice,

wherein
the first orifice ( 111 ) of the hydraulic pump ( 110 ) is connected to the first orifice ( 141 , 151 ) of each of the second ( 120 ) and third ( 130 ) hydraulic motors,
the second orifice ( 142 ) of the second hydraulic motor ( 120 ) is connected to the first orifice (A 1 ) of the first elementary motor (M 1 ) of the first hydraulic motor ( 100 ),
the second orifice ( 152 ) of the third hydraulic motor ( 130 ) is connected to the first orifice (A 2 ) of the second elementary motor (M 2 ) of the first hydraulic motor ( 100 ),

characterized in that said system is configured so as to
in a first configuration (C 1 ), connect the second orifice (R 1 ) of the first elementary motor (M 1 ) and the second orifice (R 2 ) of the second elementary motor (M 2 ) of the first hydraulic motor to the second orifice ( 112 ) of the hydraulic pump ( 110 ), and
in a second configuration (C 2 ), connect the second orifice (R 1 ) of the first elementary motor (M 1 ) of the first hydraulic motor ( 100 ) to the second orifice ( 112 ) of the pump ( 110 ) and the second orifice (R 2 ) of the second elementary motor (M 2 ) of the first hydraulic motor ( 100 ) to the first orifice (A 1 ) of the first elementary motor (M 1 ) of the first hydraulic motor ( 100 ) and to the first orifice (A 2 ) of the second elementary motor (M 2 ) of the first hydraulic motor ( 100 ).

4. The system according to claim 3 , wherein the second motor ( 120 ) is a double hydraulic motor with two operating cylinder capacities, comprising two elementary motors ( 121 , 122 ) each having a first (A 21 , A 22 ) and a second orifice (R 21 , R 22 ), said second orifices (R 21 , R 22 ) being connected to each other,
the second motor ( 120 ) further comprising a distributor ( 140 ) suitable for,
in a first configuration (D 1 ), connecting the first orifice (A 21 ) of the first elementary motor ( 121 ) and the first orifice (A 22 ) of the second elementary motor ( 122 ) to the first orifice ( 141 ) of the second hydraulic motor ( 120 ), and connecting the second orifice (R 21 ) of the first elementary motor ( 121 ) and the second orifice (R 22 ) of the second elementary motor ( 122 ) to the second orifice ( 142 ) of the second hydraulic motor ( 120 ); and
in a second configuration (D 2 ), connecting the first orifice (A 21 ) of the first elementary motor ( 121 ) to the first orifice ( 141 ) of the second hydraulic motor ( 120 ), and connecting the second orifice (R 21 ) of the first elementary motor ( 121 ), the first orifice (A 22 ) of the second elementary motor ( 122 ) and the second orifice (R 22 ) of the second elementary motor ( 122 ) to the second orifice ( 142 ) of the second hydraulic motor ( 120 ).

5. The system according to one of claim 3 or 4 , wherein the third motor ( 130 ) is a double hydraulic motor with two operating cylinder capacities, comprising two elementary motors ( 131 , 132 ) each having a first (A 31 , A 32 ) and a second orifice (R 31 , R 32 ), said second orifices (R 31 , R 32 ), being connected to each other,
the third motor ( 130 ) further comprising a distributor ( 150 ) suitable for,
in a first configuration (E 1 ), connecting the first orifice (A 31 ) of the first elementary motor ( 131 ) and the first orifice (A 32 ) of the second elementary motor ( 132 ) to the first orifice ( 151 ) of the third hydraulic motor ( 130 ), and connecting the second orifice (R 31 ) of the first elementary motor ( 131 ) and the second orifice (R 32 ) of the second elementary motor ( 132 ) to the second orifice ( 152 ) of the third hydraulic motor ( 130 ); and
in a second configuration (E 2 ), connecting the first orifice (A 31 ) of the first elementary motor ( 131 ) to the first orifice ( 151 ) of the third hydraulic motor ( 130 ), and connecting the second orifice (R 31 ) of the first elementary motor ( 131 ) the first orifice (A 32 ) of the second elementary motor ( 132 ) and the second orifice (R 32 ) of the second elementary motor ( 132 ) to the second orifice ( 152 ) of the third hydraulic motor ( 130 ).

Assignees

• Poclain Hydraulics Ind

Inventors

• Houillon Pierre-Louis
• Lemaire Gilles

Classifications

• F03C1/08

  Distributing valve-gear peculiar thereto (for engines with positive-displacement in general F01L; {F03C1/06 takes precedence}) · CPC title

• F04B27/08 Primary

  having cylinders coaxial with, or parallel or inclined to, main shaft axis · CPC title

• F03C1/0678

  Control · CPC title

• F04B1/063 Primary

  by using a valve in a system with several pumping chambers wherein the flow-path through the chambers can be changed, e.g. between series and parallel flow · CPC title

• F03C1/045

  by using a valve in a system with several pump or motor chambers, wherein the flow path through the chambers can be changed, e.g. series-parallel · CPC title