Hydraulic motor-pump with fixed or variable displacement

Patent metadata

Field	Value
Publication number	US-9546654-B2
Application number	US-201414171972-A
Country	US
Kind code	B2
Filing date	Feb 4, 2014
Priority date	Feb 4, 2013
Publication date	Jan 17, 2017
Grant date	Jan 17, 2017

Abstract

The fixed or variable displacement hydraulic motor-pump ( 1 ) includes a motor-pump central rotor ( 3 ) in which a hydraulic cylinder ( 14 ) is arranged, the rotor ( 3 ) being in sealed contact with an input-output spool valve ( 43 ) connecting the cylinder ( 14 ) with a motor-pump frame ( 2 ) while a hydraulic piston ( 13 ) moves in the cylinder ( 14 ) to push, using a hydraulic piston guided plunger ( 18 ), a tangential arm ( 22 ) articulated in the central rotor ( 3 ), and a tangential arm antifriction roller ( 28 ) on a motor-pump peripheral rotor ( 29 ) synchronized in rotation with the motor-pump central rotor ( 3 ).

First claim

The invention claimed is:

1. A fixed or variable displacement hydraulic motor-pump, characterized in that it comprises:
at least one motor-pump central rotor ( 3 ) that includes a central rotor power take-off ( 4 ) and that is housed on or in a motor-pump frame ( 2 ), said rotor ( 3 ) being able to rotate in at least one central rotor ( 5 ) comprised by said frame ( 2 ) while remaining in as sealed contact as possible with at least one input/output spool valve ( 43 ) kept approximately stationary relative to said frame ( 2 ), said spool valve ( 43 ) being able to connect at least one hydraulic cylinder ( 14 ) arranged radially or tangentially in said rotor ( 3 ) with at least one internal input/output duct ( 57 ) and at least one external input/output duct ( 58 ) via an internal input/output central rotor channel ( 15 ) and an input/output central rotor orifice ( 16 ) arranged in the motor-pump central rotor ( 3 ), respectively, one of the ends of said ducts ( 57 , 58 ) being secured directly or indirectly and sealably in the motor-pump frame ( 2 ), while the other end of said ducts ( 57 , 58 ) is sealably secured in the input/output spool valve ( 43 );
at least one hydraulic piston ( 13 ) able to move in translation in the hydraulic cylinder ( 14 ) and able to push a guided hydraulic piston plunger ( 18 ) or able to be pushed by the latter, said plunger ( 18 ) being guided in translation by a plunger guide ( 19 ) arranged radially or tangentially in the motor-pump central rotor ( 3 );
at least one tangential arm ( 22 ) whereof one end is articulated in the motor-pump central rotor ( 3 ) while the other end includes a tangential arm bearing face on plunger ( 23 ) that can exert a force on a plunger path of contact on the tangential arm ( 21 ) included by the guided hydraulic piston plunger ( 18 ), the direction of said force being approximately tangential to the axis of rotation of said arm ( 22 );
at least one motor-pump peripheral rotor ( 29 ) made up of at least one cylindrical peripheral rotor casing ( 32 ) whereof at least one end ends with a peripheral rotor flange ( 35 ), said peripheral rotor ( 29 ) being able to rotate in at least one peripheral rotor bearing ( 36 ) supported by a peripheral rotor stator ( 65 ) that is directly or indirectly secured to the motor-pump frame ( 2 ), the motor-pump central rotor ( 3 ) being completely or partially housed inside said peripheral rotor ( 29 );
at least anti-friction means ( 196 ) included by the tangential arm ( 22 ) on its face situated opposite the tangential arm bearing face on plunger ( 23 ), said means ( 196 ) bearing on the inner surface of the cylindrical peripheral rotor casing ( 32 ).

2. The fixed or variable displacement hydraulic motor-pump according to claim 1 , characterized in that the motor-pump peripheral rotor ( 29 ) is forced to rotate at the same speed as the motor-pump central rotor ( 3 ) by an angular peripheral rotor synchro ring ( 42 ) secured in rotation to a central rotor angular synchro ring ( 11 ) included by the motor-pump central rotor ( 3 ) by at least one angular synchronizing pinion ( 12 ) rotating around at least one angular synchronizing pinion shaft ( 81 ) comprised by the motor-pump frame ( 2 ).

3. The fixed or variable displacement hydraulic motor-pump according to claim 2 , characterized in that the antifriction means ( 196 ) are made up of at least one tangential arm antifriction roller ( 28 ) that can roll on the one hand on a tangential arm rolling track ( 26 ) included by the tangential arm ( 22 ) on its face situated opposite the tangential arm bearing face on plunger ( 23 ), and on the other hand on a peripheral rotor rolling track ( 33 ) included by the inner surface of the peripheral rotor cylindrical casing ( 32 ), the travel of said roller ( 28 ) being limited simultaneously relative to the tangential arm rolling track ( 26 ) and the peripheral rotor rolling track ( 33 ) by at least one tangential arm roller rack ( 27 ) included by the tangential arm rolling track ( 26 ) and by at least one peripheral rotor roller ring ( 34 ) included by the peripheral roller rolling track ( 33 ), said rack ( 27 ) and said ring ( 34 ) simultaneously cooperating with at least one roller pinion ( 87 ) included by said roller ( 28 ).

4. The fixed or variable displacement hydraulic motor-pump according to claim 1 , characterized in that the antifriction means ( 196 ) are made up of at least one tangential arm friction pad ( 194 ) included by the tangential arm ( 22 ) on its face situated opposite the tangential arm bearing face on plunger ( 23 ), said pad ( 194 ) being able to come into contact with a peripheral rotor friction track ( 195 ) included by the inner surface of the peripheral rotor cylindrical casing ( 32 ).

5. The fixed or variable displacement hydraulic motor-pump according to claim 1 , characterized in that the hydraulic piston ( 13 ) comprises a plunger ball joint on hydraulic piston ( 17 ) on its circular face that is furthest from the motor-pump central rotor ( 3 ), said ball joint ( 17 ) being made up of a hollow or raised truncated sphere that cooperates with a hydraulic piston ball joint on plunger ( 20 ) comprised by the hydraulic piston guided plunger ( 18 ), said ball joint ( 20 ) also being made up of a hollow or raised truncated sphere shape, while the two truncated sphere shapes are complementary and constitute a ball joint connection between said piston ( 13 ) and said plunger ( 18 ).

6. The fixed or variable displacement hydraulic motor-pump according to claim 1 , characterized in that the hydraulic piston guided plunger ( 18 ) comprises a brace ( 82 ) placed in the extension of the hydraulic piston ( 13 ), and a strut ( 83 ) mounted secured to said brace ( 82 ) and perpendicular to the latter, said strut ( 83 ) bearing the plunger path of contact on tangential arm ( 21 ), while each of its two ends can slide in the plunger guide ( 19 ).

7. The fixed or variable displacement hydraulic motor-pump according to claim 1 , characterized in that the motor-pump central rotor ( 3 ) includes a cylindrical axle housing ( 84 ) in which a tangential arm axle ( 24 ) is housed whereas the tangential arm ( 22 ) is passed through by said axle ( 24 ) so as to be articulated in the motor-pump central rotor ( 3 ).

8. The fixed or variable displacement hydraulic motor-pump according to claim 1 , characterized in that the motor-pump central rotor ( 3 ) includes a tangential arm return spring ( 25 ) that bears on the one hand on said rotor ( 3 ) and on the other hand on the tangential arm ( 22 ).

9. The fixed or variable displacement hydraulic motor-pump according to claim 3 , characterized in that the peripheral rotor rolling track ( 33 ) includes at least one hollow or protruding guide rail ( 85 ) that cooperates with at least one hollow or protruding guide groove ( 86 ) included by the tangential arm antifriction roller ( 28 ).

10. The fixed or variable displacement hydraulic motor-pump according to claim 1 , characterized in that the central rotor bearing ( 5 ) comprises an inner central rotor bearing track ( 7 ) provided with at least one central rotor inner bearing ring ( 9 ), said track ( 7 ) being secured to the motor-pump central rotor ( 3 ), on the one hand, and an outer central rotor bearing track ( 8 ) provided with at least one central rotor outer bearing ring ( 10 ), said track ( 8 ) being secured to the motor-pump frame ( 2 ), on the other hand, whereas at least three central rotor bearing rollers ( 6 ) can simultaneously roll on the central rotor inner bearing track ( 7 ) and on the central rotor outer bearing track ( 8 ) and remain at a constant distance from each other owing to at least one roller pinion ( 87 ) included by each centr

Assignees

• Rabhi Vianney

Inventors

• Rabhi Vianney

Classifications

• F16H39/00

  Rotary fluid gearing using pumps and motors of the volumetric type, i.e. passing a predetermined volume of fluid per revolution (control of exclusively fluid gearing F16H61/38) · CPC title

• B60K2007/0092

  the motor axle being coaxial to the wheel axle · CPC title

• F04B11/0016

  with a fluid spring · CPC title

• F03C1/047

  the pistons co-operating with an actuated element at the outer ends of the cylinders · CPC title

• F16H39/04

  with liquid motor and pump combined in one unit · CPC title