EP3234359A1 - Appareil hydraulique a pistons radiaux comprenant au moins un roulement a billes - Google Patents
Appareil hydraulique a pistons radiaux comprenant au moins un roulement a billesInfo
- Publication number
- EP3234359A1 EP3234359A1 EP15820105.3A EP15820105A EP3234359A1 EP 3234359 A1 EP3234359 A1 EP 3234359A1 EP 15820105 A EP15820105 A EP 15820105A EP 3234359 A1 EP3234359 A1 EP 3234359A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- shaft
- hydraulic apparatus
- bearing
- cover
- contact
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000036316 preload Effects 0.000 claims description 14
- 239000012530 fluid Substances 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims 1
- 238000007789 sealing Methods 0.000 description 9
- 238000011084 recovery Methods 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 239000010687 lubricating oil Substances 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/002—Reciprocating-piston liquid engines details; components parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
- F03C1/0403—Details, component parts specially adapted of such engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
- F03C1/0403—Details, component parts specially adapted of such engines
- F03C1/0435—Particularities relating to the distribution members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03C—POSITIVE-DISPLACEMENT ENGINES DRIVEN BY LIQUIDS
- F03C1/00—Reciprocating-piston liquid engines
- F03C1/02—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders
- F03C1/04—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement
- F03C1/047—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders
- F03C1/0472—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinders in star or fan arrangement the pistons co-operating with an actuated element at the outer ends of the cylinders with cam-actuated distribution members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/0404—Details or component parts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/047—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the outer ends of the cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/10—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary
- F04B1/107—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement the cylinders being movable, e.g. rotary with actuating or actuated elements at the outer ends of the cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
- F04B53/162—Adaptations of cylinders
Definitions
- the present invention relates to the field of hydraulic apparatus.
- the present invention relates to the field of hydraulic devices with radial pistons.
- Figure 1 illustrates a longitudinal sectional view of a radial piston hydraulic apparatus 1 according to a prior art.
- a similar radial piston hydraulic apparatus is for example described in the document FR 2 955 903.
- the hydraulic apparatus 1 comprises a shaft 2 disposed along an axis of rotation 3 and a cover 4 forming a housing element, free to rotate relative to each other.
- the hydraulic apparatus 1 further comprises an assembly comprising a multilobe cam 5, a cylinder block 6, and a distributor 7.
- the cam 5 is formed of a ring formed in the cover 4 and comprises, on a radially internal surface, a series of generally sinusoidal-like lobes equi-distributed around the axis of rotation 3.
- the cylinder block 6 is placed inside the ring forming the cam 5 and defines a plurality of cylinders oriented radially with respect to the axis of rotation 3 and opening onto an outer peripheral face of the cylinder block 6 opposite the cam 5.
- a piston is mounted with radial sliding respectively in each of the cylinders. Each piston bears on the radially inner surface of the cam 5.
- the distributor 7 is adapted to apply in a controlled manner a fluid under pressure successively on each of the pistons, more specifically in an internal chamber of the cylinders adjacent to the pistons, so that the successive support of the pistons on the lobes of the cam 5 causes the relative rotation of the cylinder block 6 and elements which are linked to it with respect to the cam 5 and thus to the cover 4 or vice versa.
- a fluid under pressure successively on each of the pistons, more specifically in an internal chamber of the cylinders adjacent to the pistons
- the hydraulic apparatus 1 also comprises two tapered roller bearings 8a and 8b by means of which the shaft 2 and the cover 4 are mounted rotating with respect to each other.
- the bearings 8a and 8b are mounted in radial contact with the shaft 2 on the one hand and the lid 4 on the other hand, and are arranged on either side of the assembly formed by the cam 5.
- Each bearing 8a and 8b is also mounted between two axial abutment surfaces formed in the shaft 2 and the cover 4.
- tapered roller bearings 8a and 8b need to be mounted without axial play, so as to ensure the recovery of the axial forces in the hydraulic device 1 and prevent the bearings 8a and 8b from disengaging.
- preload washers 9a or spring rings 9b are for example in axial contact with the bearings 8a and 8b on the one hand and with the axial abutment surface of the cover 4 on the other hand, so as to press the bearings 8a and 8b against the axial abutment surface of the shaft 2, and thus ensure a mounting without axial play of the tapered roller bearings 8a and 8b in the hydraulic apparatus 1.
- the preload washers 9a or the elastic rings 9b generate a preload force which induces a drag at the bearings 8a and 8b, thus reducing their life.
- tapered roller bearings therefore requires them to be replaced frequently.
- rollers of the bearings 8a and 8b are conventionally bathed in a lubricating oil intended to reduce the friction between the rollers and the inner and outer rings of the bearings 8a and 8b.
- a lubricating oil intended to reduce the friction between the rollers and the inner and outer rings of the bearings 8a and 8b.
- the rollers move the lubricating oil, thereby generating additional drag on the bearings 8a and 8b.
- the object of the present invention is to solve the problems previously described by proposing a hydraulic device with radial pistons comprising:
- a cover forming a housing element, the cover and the shaft being free to rotate with respect to each other;
- a distribution assembly comprising:
- a distributor configured to exert a thrust force against the cylinder block along the axis of the shaft so as successively to apply a fluid under pressure on said pistons
- a first mechanical bearing mounted in radial contact between the cover and the shaft, the first mechanical bearing being a straight contact ball bearing
- a set of second mechanical bearings comprising at least one second mechanical bearing mounted in radial contact between the cover and the shaft, said set of second mechanical bearings being configured to take the thrust force exerted by the distributor.
- the shaft comprises an axial abutment surface against which the cylinder block is pushed, when the distributor exerts the thrust force against the cylinder block.
- the second mechanical bearing is a tapered roller bearing or an angular contact ball bearing.
- the second mechanical bearing comprises an outer cage and an inner cage between which rolling elements are mounted, axially opposite sides of the inner cage and the outer cage being respectively mounted in axial contact with the shaft and the cover, so to resume the pushing effort.
- the hydraulic apparatus comprises a sleeve rotatably mounted around the shaft and through which the second mechanical bearing is mounted in radial contact and in axial contact with the shaft.
- the set of second mechanical bearings comprises a ball bearing with right contact and a thrust ball.
- the thrust bearing comprises a first cage and a second cage between which balls are mounted
- the right contact ball bearing of the assembly comprises an inner cage and an outer cage between which balls are mounted, the first cage being mounted in axial contact with the shaft, and axially opposite sides of the outer race of the right contact ball bearing of the assembly being respectively mounted in axial contact with the second cage of the thrust bearing and the cover, so as to resume the pushing force.
- the set of second mechanical bearings comprises a needle bearing and a cylindrical roller stop.
- the cylindrical roller stopper comprises a first cage and a second cage between which cylindrical rollers are mounted, the first cage of the cylindrical roller stopper being mounted in axial contact with the lid and the second cage of the cylindrical roller thrust bearing. being mounted in axial contact with the cylinder block, on the sides radially opposite the first cage and the second cage of the cylindrical roller stop being respectively mounted in radial contact with the lid and the cylinder block.
- the needle bearing comprises an inner race and an outer race between which needles are mounted, axially opposite sides of the inner race of the needle bearing being respectively mounted in axial contact with the shaft and the cover, and on the sides. axially opposite the outer race of the needle bearing being mounted in axial contact with the cover.
- the hydraulic apparatus comprises a sleeve rotatably mounted around the shaft and through which the needle bearing is mounted in radial contact and in axial contact with the shaft.
- the set of second mechanical bearings is mounted without axial play between the shaft and the cover.
- the outer race of the second mechanical bearing is mounted in axial contact with the cover via a preloading washer, so as to ensure the assembly without axial play of the set of second mechanical bearings between the shaft and lid.
- the outer race of the right contact ball bearing of the assembly is mounted in axial contact with the second cage of the thrust bearing by means of a preloading washer, so as to ensure the assembly without axial play. of the set of second mechanical bearings between the shaft and the cover.
- the set of second mechanical bearings is positioned on a first side of the distribution assembly disposed in the thrust direction of the distributor against the cylinder block.
- the hydraulic apparatus comprises two first mechanical bearings arranged on either side of the distribution assembly, said first mechanical bearings being right contact ball bearings.
- the first mechanical bearing is positioned on a second side of the distribution assembly disposed opposite the thrust direction of the distributor against the cylinder block.
- the first mechanical bearing comprises an inner cage and an outer cage between which balls are mounted, axially opposite sides of the outer cage and the inner cage being respectively mounted in axial contact with the lid and the shaft, so that to obtain a looping of the axial forces by the cover.
- the set of second mechanical bearings is positioned on the second side of the dispensing assembly disposed opposite the direction of thrust of the dispenser against the cylinder block.
- the first mechanical bearing is positioned on the first side of the distribution assembly disposed in the thrust direction of the distributor against the cylinder block.
- the first mechanical bearing comprises an inner cage and an outer cage between which balls are mounted, axially opposite sides of the inner cage being both mounted in axial contact with the shaft, so as to ensure a closure of the forces by the tree.
- the shaft is hollow and configured to be mounted around a shaft, in particular a differential shaft, said hydraulic apparatus comprising a first annular seal mounted in radial contact with an outer surface of one end of the shaft. a part and the lid on the other hand and a second annular seal mounted in radial contact with an inner surface of said end of the shaft on the one hand and configured to be mounted in radial contact with the other shaft.
- the hydraulic apparatus comprises a hoop comprising a first and a second annular portion and connected to one another by an intermediate portion, the first annular portion of the hoop being mounted on the outer surface of the end of the hinge. shaft, and the first annular seal being mounted in radial contact with the end of the shaft via said first annular portion, the second annular portion of the hoop extending from the intermediate portion away from the end of the shaft, and the second annular seal being mounted in radial contact with the end of the shaft by the intermediate of said second annular portion.
- the inner surface of the end of the shaft is provided with a shoulder forming a space which accommodates the second annular seal.
- the hydraulic apparatus further comprises an annular band mounted on the outer surface of the end of the shaft and through which the first annular seal is in radial contact with the end of the shaft.
- the outer surface of the end of the shaft is provided with a shoulder accommodating the first part of the hoop or the ring hoop.
- first and second annular seals are generally arranged around each other.
- FIG. 1 shows a partial schematic sectional view of a hydraulic apparatus according to the prior art
- FIG. 2 shows a partial schematic sectional view of an exemplary hydraulic apparatus according to a first embodiment of the invention
- FIG. 3 shows a partial schematic sectional view of another example of hydraulic apparatus according to the first embodiment of the invention.
- Figure 4 shows a partial schematic sectional view of another example of hydraulic apparatus according to the first embodiment of the invention
- Figure 5 shows a partial schematic sectional view of another example of hydraulic apparatus according to the first embodiment of the invention
- FIG. 6 shows a partial diagrammatic view, in couple, of an exemplary hydraulic apparatus according to a second embodiment of the invention, said hydraulic apparatus being in an engaged configuration
- Figure 7 shows a partial schematic sectional view of the hydraulic apparatus illustrated in Figure 6 in disengaged configuration
- Figure 8 shows a partial schematic sectional view of an alternative embodiment of the hydraulic apparatus shown in Figure 6;
- Figure 9 shows a partial schematic sectional view of a sealing device of the hydraulic apparatus shown in Figure 2;
- Figure 10 shows a partial schematic sectional view of a variant of the sealing device illustrated in Figure 9;
- FIG. 11 shows a partial diagrammatic view, in section, of a variant of the sealing device illustrated in FIG.
- Figures 2 to 5 each show a partial sectional view of a hydraulic apparatus 10 according to a first embodiment of the invention. This figure shows an axis of rotation 1 1 of the hydraulic apparatus 10.
- the hydraulic apparatus 10 is preferably a motor. According to one variant, the hydraulic apparatus is a pump.
- the hydraulic apparatus 10 comprises a shaft 12 arranged along the axis of rotation 11 and a cover 13 forming a housing element.
- the shaft 12 and the cover 13 are free to rotate relative to each other.
- the cover 13 is preferably fixed, while the shaft 12 is free to rotate about the axis of rotation 1 January.
- the hydraulic apparatus 10 is configured to transmit only pure torque.
- the hydraulic apparatus 10 does not transmits no axial force, for example generated by a thrust of toothing, or radial force, for example generated by the support of a wheel.
- the hydraulic apparatus 10 further comprises a dispensing assembly comprising a multilobe cam 14, a cylinder block 15, and a distributor 16.
- the cam 14 is formed of a ring arranged coaxially with the axis of rotation 1 1 and formed in the cover 13.
- the ring of the cam 14 is integral with the cover 13.
- the cam 14 comprises on a radially internal surface , a series of equi-distributed lobes around the axis of rotation 1 1. Each of the lobes has a globally sinusoidal appearance.
- the cylinder block 15 is mounted on the shaft 12 and is placed inside the ring forming the cam 14. It defines a plurality of cylinders oriented radially with respect to the axis of rotation 1 1 and opening on one side external device of the cylinder block 15 facing the cam 14.
- a piston is mounted to slide radially respectively in each of the cylinders. Each piston bears on the radially inner surface of the cam 14.
- the distributor 16 is mounted on the shaft 12, a first side of the cylinder block 15 along the axis of rotation 1 January.
- the distributor 16 is adapted to apply in a controlled manner a fluid under pressure successively on each of the pistons, more specifically in an internal chamber of the cylinders adjacent to the pistons, so that the successive support of the pistons on the lobes of the cam 14 causes the relative rotation of the cylinder block 15 and the elements which are connected to it, in particular the shaft 12, with respect to the cam 14 and therefore to the cover 13 or vice versa.
- the distributor 16 is also configured to exert a thrust force P against the cylinder block 15 along the axis of rotation 1 January.
- the hydraulic apparatus 10 comprises, for example, an elastic return element, such as a tension or compression spring, to push the distributor 16 against the cylinder block 15.
- the shaft 12 comprises a shoulder 17 forming an axial abutment surface 18 against which the cylinder block 15 is pushed, when the distributor 16 exerts the thrust force P against the cylinder block 15
- the axial abutment surface 18 (and the shoulder 17) is provided with a second side of the cylinder block 15 opposite to the first side.
- the dispensing assembly further comprises an actuator 19 configured to engage and disengage the cylinder block 15.
- the actuator 19 is mounted on the shaft 12 of the second side of the block cylinders 15, between the axial abutment surface 18 and the cylinder block 15.
- the actuator 19 is adapted to selectively immobilize the cylinder block 15 relative to the shaft 12.
- the actuator 19 is configured to immobilize the cylinder block Relative to the shaft 12, when it is desired that the rotation of the cylinder block 15 with respect to the cam 14 causes rotation of the shaft 12.
- the actuator 19 is a pack of records.
- the actuator 19 has a bearing surface adapted to engage the cylinder block 15.
- the bearing surface 20 is, for example, a radial collar arranged to frictionally engage a lateral surface of the cylinder block 15.
- a clutch device is used, that is to say a device with teeth and grooves disposed on the actuator 19 and on the cylinder block 15, to immobilize them in rotation when these teeth and grooves are engaged .
- the actuator 19 may have a friction cone intended to come into contact with a cone of complementary shape arranged on the cylinder block 15 so as to engage it.
- the hydraulic apparatus 10 also comprises a first mechanical bearing 21 and an assembly 22 of second mechanical bearings comprising at least one second mechanical bearing, by means of which the shaft 12 and the cover 13 are mounted to rotate relative to one another. other.
- first mechanical bearing 21 and the second or second mechanical bearings 22 are mounted in radial contact with the shaft 12 on the one hand and the cover 13 on the other hand.
- the assembly 22 of second mechanical bearings is configured to take up the thrust force P exerted by the distributor 16.
- the first mechanical bearing 21 is a right-contact ball bearing comprising an outer cage and an inner cage between which balls are mounted.
- the term "right-contact ball bearing” means a ball bearing in which the resultant of the contact force of the outer cage and the inner race with the ball has only a radial component, in opposition for example to an angular contact ball bearing whose resultant will have both a radial component and an axial component.
- the first mechanical bearing 21 is for example a deep groove ball bearing.
- the right-contact ball bearing 21 is configured to take up axial forces of small amplitude with respect to the thrust force P.
- the assembly 22 of second mechanical bearings is positioned on a first side of the distribution assembly disposed in the thrust direction of the distributor 16 against the cylinder block 15.
- the assembly 22 of second mechanical rollers is arranged opposite the distributor 16 relative to the cylinder block 15.
- the first mechanical bearing 21 is furthermore positioned on a second side of the distribution assembly arranged opposite the thrust direction of the distributor 16 against the cylinder block 15.
- the assembly 22 of second mechanical bearings comprises a tapered roller bearing 22a having an inner cage and an outer cage between which conical rollers are mounted.
- the tapered roller bearing 22a is arranged such that the axial resultant of the thrust force exerted by the tapered rollers on the inner race of the tapered roller bearing 22a is opposite to the thrust force P of the distributor 16 on the the block cylinder 15.
- the tapered roller bearing 22a is positioned so that its center of thrust C on the axis of rotation January 1 is shifted towards the dispensing assembly.
- the assembly 22 of second mechanical bearings comprises an angular contact ball bearing 22b having an inner race and an outer cage between which balls are mounted.
- the angular contact ball bearing 22b is arranged such that the axial resultant of the thrust force P exerted by the balls on the inner ring of the angular contact ball bearing 22b is in the opposite direction to the thrust force P of the distributor 16 on the cylinder block 15.
- the angular contact ball bearing 22b is positioned so that its center of thrust C on the axis of rotation 1 1 is shifted towards the dispensing assembly.
- the assembly 22 of second mechanical bearings comprises a right-contact ball bearing 22c having an outer cage and an inner cage between which balls are mounted, and a ball bearing 22d having a first cage and a second cage between which balls are mounted.
- the assembly 22 of second mechanical bearings makes it possible to take up the thrust force P exerted by the distributor 16 on the cylinder block 15, and which is transmitted to the shaft 12.
- the assembly 22 second mechanical bearings is mounted in axial clearance between the shaft 12 and the cover 13, so as to ensure the recovery of the axial forces in the hydraulic apparatus 10 and in particular prevent the assembly 22 of second mechanical rolls is disengaged.
- the outer race of the second mechanical bearing 22a, 22b is mounted in axial contact with the cover 13 via a preload washer 28, so as to ensure the assembly without axial play. of the assembly 22 of second mechanical bearings between the shaft 12 and the cover 13.
- the hydraulic device 10 can be dimensioned so that that the second mechanical bearing 22a, 22b is mounted without axial play between the shaft 12 and the cover 13.
- the outer race of the right-contact ball bearing 22c is mounted in axial contact with the second cage of the thrust bearing 22d by means of a preload washer 29, so that to ensure the assembly without axial play of the assembly 22 of second mechanical bearings between the shaft 12 and the cover 13.
- the inner race of the right contact ball bearing 22c is in axial contact with any part .
- the hydraulic apparatus 10 can be dimensioned so that the second mechanical bearings 22c, 22d are mounted without axial play between them and between the shaft 12 and the cover 13.
- the preloading washer 28, 29 or the dimensioning of the hydraulic apparatus 10 without axial play induce a low amplitude axial preload force compared to the thrust force P. As described later, this effort is taken up by the first mechanical bearing 21.
- axially opposite sides of the outer casing and the inner casing of the first mechanical bearing 21 are respectively mounted in axial contact with the cover 13 and the shaft 12, so as to obtain a looping axial forces by the cover 13 and resume the preload force applied to the assembly 22 of second mechanical bearings.
- the inner race of the first mechanical bearing 21 is for example mounted in axial contact with the shaft 12 by means of a first elastic ring 25 mounted in a groove on the shaft 12, between the first mechanical bearing 21 and the distribution assembly (3), and the outer race of the first mechanical bearing 21 is for example mounted in axial contact with the cover 13 via a second elastic ring 26 mounted in a groove on the cover 13 on one side of the first mechanical bearing 21 opposite to the first elastic ring 25.
- the first elastic ring 25 can be replaced by a shoulder having an axial abutment surface 27 ( Figures 2 and 4). It will be understood that such an assembly allows the first mechanical bearing 21 to resume the preload force applied to the assembly 22 of second mechanical bearings.
- the assembly 22 of second mechanical bearings is positioned on the second side of the distribution assembly.
- the assembly 22 of second mechanical rollers is arranged opposite the actuator 19 relative to the cylinder block 15.
- the first mechanical bearing 21 is furthermore positioned on the first side of the distribution set.
- the assembly 22 of second mechanical bearings comprises a tapered roller bearing 22e having an inner race and an outer race between which conical rollers are mounted.
- the assembly 22 of second mechanical bearings may comprise the second mechanical bearing or bearings 22b; 22c, 22d described in connection with Figures 3 and 4.
- the tapered roller bearing 22e is arranged such that the axial resultant of the thrust force P exerted by the tapered rollers on the inner race of the tapered roller bearing 22e is opposite to the thrust force P of the distributor. on the cylinder block 15.
- the tapered roller bearing 22e is positioned so that its center of thrust C on the axis of rotation 11 is shifted away from the dispensing assembly.
- axially opposite sides of the inner race and the outer race of the second mechanical race 22e, 22b are respectively mounted in axial contact with the shaft 12 and the cover 13.
- the outer cage of the second mechanical bearing 22e is for example mounted in axial contact with the cover 13 via a first elastic ring 30 mounted in a groove on the cover 13, between the second mechanical bearing 22e and the distribution assembly, and the cage the second mechanical bearing 22e is for example mounted in axial contact with the shaft 12 via a second elastic ring 31 mounted in a groove on the shaft 12 on a side opposite to the first elastic ring 30.
- axially opposite sides of the inner race of the first mechanical bearing 21 are both mounted in axial contact with the shaft 12, so as to obtain a looping of the forces by the shaft 12.
- the inner race of the first mechanical bearing 21 is for example mounted in axial contact with the second axial abutment surface 23 of the shaft 12 on the one hand, and with the shaft 12 via a elastic ring 32 on the other hand.
- the outer casing of the first mechanical bearing 21 is for example mounted in axial contact with the second axial abutment surface 23 of the shaft 12 and, on the opposite side to the shoulder 17, away from the axial abutment surface 24 of the cover 13.
- the first mechanical bearing 21 allows the assembly 22 of second mechanical bearings to resume the thrust force P exerted by the distributor 16 on the cylinder block 15.
- the shaft 12 is hollow and configured to be mounted around a shaft, this shaft possibly being a differential shaft 30.
- the differential shaft 30 is coupled to a differential (no shown) associated with a gearbox (not shown) at its end arranged opposite the distributor 16 with respect to the cylinder block 15.
- the hydraulic apparatus 10 comprises a sealing device of which several variants are illustrated in Figures 9, 10 and 1 1.
- the sealing device comprises a first annular seal 35 mounted in radial contact with an outer surface of one end of the shaft 12, arranged on the side of the distributor 16 with respect to the cylinder block 15, on the one hand and the cover 13 on the other hand, and a second annular seal 37 mounted in radial contact with the inner surface of said end of the shaft 12 on the one hand and configured to be mounted in radial contact with the differential shaft 30 d 'somewhere else.
- the hydraulic apparatus 10 is provided with a hoop 31 comprising a first and a second concentric annular portion 32, 33, the first annular portion 32 having a diameter smaller than that of the second portion annular 33, and connected to each other by an intermediate portion 34 extending preferably radially between said first and second annular portions 32, 33.
- the band 31 thus has a generally S-shaped profile.
- the first annular portion 32 of the hoop 31 is mounted on the outer surface of the end of the shaft 12.
- the first annular seal 35 is mounted in radial contact with the first annular portion 32 of the hoop 31 on the one hand and with the cover 13 on the other hand, thereby sealing the hydraulic apparatus 10.
- the first annular seal 35 is thus mounted in radial contact with the shaft 12 via the first annular portion 32 of the hoop 31.
- the first annular portion 32 of the hoop 31 thus serves as a friction surface for the first annular seal 35.
- the first annular seal 35 is for example placed against the intermediate portion 34 of the hoop 31.
- a shoulder 36 is for example provided at the end of the shaft 12 to accommodate the first annular portion 32 of the hoop 31.
- the second annular portion 33 of the hoop 31 extends from the intermediate portion 34 away from the end of the shaft 12.
- the second annular seal 37 is mounted in radial contact with the second annular portion 33 of the hoop 31 on the one hand and with the differential shaft 30 on the other hand, thus ensuring the seal between the differential shaft 30, and therefore the differential and / or the gearbox, and the shaft 12 of the device 10.
- the second annular seal 37 is thus mounted in radial contact with the shaft 12 via the second annular portion 33 of the hoop 31.
- the first and second annular seals 35, 37 are mounted on opposite faces of the hoop 31.
- the second annular portion 33 of the hoop 31 forms a housing around the differential shaft 30 to accommodate the second annular seal 37.
- the differential shaft 30 has for example a flange 38 on which is mounted the second annular seal 37.
- the two annular portions 32 and 33 of the hoop 31 have the same diameter.
- the second annular portion 33 of the hoop 31 has a diameter smaller than the diameter of the first annular portion 32 of the hoop 31.
- the inner surface of the end of the shaft 12 is provided with a shoulder 39 forming a housing 40 between the shaft 12 and the differential shaft 30, accommodating the second annular seal 37.
- the variant illustrated in FIG. 11 differs from the variant illustrated in FIG. 10 in that an annular ring 41 is also mounted on the outer surface of the end of the shaft 12 and is interposed between the first annular seal 35 and the shaft 12.
- the first annular seal 35 of the hoop 31 is in radial contact with the shaft 12 via the annular ring 41.
- the outer surface of the end of the shaft 12 is for example provided with a shoulder 36 accommodating the hoop 41.
- the annular ring 41 improves the friction surface between the first annular seal 35 and the shaft 12.
- first and the second annular seals 35, 37 may be arranged at least partly around each other.
- Figures 6 and 7 show a partial sectional view of a hydraulic apparatus 100 according to a second embodiment of the invention. These figures show an axis of rotation 1 1 1 of the hydraulic apparatus 100.
- the hydraulic apparatus 100 is preferably a motor. According to one variant, the hydraulic apparatus is a pump.
- the hydraulic apparatus 100 comprises a shaft 1 12 disposed along the axis of rotation 1 1 1 and a cover 1 13 forming a housing element.
- the shaft 1 12 and the lid 1 13 are free to rotate relative to each other.
- the cover 1 13 is preferably fixed, while the shaft 1 12 is free to rotate about the axis of rotation 1 1 1.
- the hydraulic apparatus 100 is configured to transmit only pure torque.
- the hydraulic apparatus 100 does not transmit axial force, for example generated by a thrust of toothing or radial force, for example generated by the support of a wheel.
- the shaft 1 12 is through and disengageable.
- the opposite ends of the shaft 1 12 along the axis of rotation 1 1 1 are intended to be coupled to external shafts (not shown).
- the ends of the shaft 1 12 are provided with contact faces 137 intended to come into contact with the outer shafts, which have undergone shot blasting followed by a hardening surface treatment.
- the contact faces 137 are thus rough and constitute friction surfaces allowing to transmit a significant torque between the shaft 1 12 and the outer shafts.
- the hydraulic apparatus 100 further includes a seal support ring 138.
- the seal support ring 138 extends around the shaft 1 12, at one end thereof. last, and is in axial contact with the cover 1 13.
- the seal support ring 138 is for example maintained in axial contact with the cover 1 13 and fixed to said cover 1 13 via a plurality of screws 139 distributed on the entire circumference of the ring 138.
- a lip 140 further extends axially from the seal support ring 138, in radial contact with the cover 1 13 so as to form a space between the lip 140, the ring 138 and the 1 12 shaft, hosting a seal and thus ensure the sealing of the hydraulic device 100.
- the seal support ring 138 is particularly advantageous because it is easily replaceable during the maintenance of the hydraulic device 100. Such a support ring seal 138 can be re mounted to one or the other or even to both ends of the shaft 1 12.
- the hydraulic apparatus 100 is for example used as a motor for motor vehicles with hydrostatic and mechanical drive.
- a mechanical drive mode the hydraulic apparatus 100 is disengaged and the shaft 1 12 is driven by the engine through the vehicle gearbox.
- a hydrostatic drive the hydraulic apparatus 100 is engaged and drives the shaft 1 12, the gearbox of the engine being in this case in neutral and the engine driving the pump providing the oil flow necessary for the operation of the hydraulic apparatus 100.
- the hydraulic apparatus 100 further comprises a dispensing assembly comprising a multilobe cam 1 14, a cylinder block 1 15, and a distributor 1 16.
- the cam 1 14 is formed of a ring arranged coaxially with the axis of rotation 1 January 1 and formed in the cover 1 13.
- the ring of the cam 1 14 is secured to the cover 1 13.
- the cam 1 14 comprises on a radially internal surface, a series of equi-distributed lobes around the axis of rotation 1 1 1. Each of the lobes has a globally sinusoidal appearance.
- the cylinder block 1 15 is mounted on the shaft 1 12 and is placed inside the ring forming the cam 1 14. It defines a plurality of cylinders oriented radially with respect to the axis of rotation 1 1 1 and opening on an outer peripheral face of the cylinder block 1 15 facing the cam 1 14.
- a piston is mounted to slide radially respectively in each of the cylinders. Each piston bears on the radially inner surface of the cam 1 14.
- the distributor 1 16 is mounted on the shaft 1 12, a first side of the cylinder block 1 15 along the axis of rotation 1 1 1.
- the distributor 1 16 is adapted to apply in a controlled manner a fluid under pressure successively on each of the pistons, more specifically in an internal chamber of the cylinders adjacent to the pistons, so that the successive support of the pistons on the lobes of the cam 1 14 causes the relative rotation of the cylinder block 1 and 15 elements connected thereto, including the shaft 1 12, relative to the cam 1 14 and therefore to the lid 1 13 or vice versa.
- the distributor 1 16 is also configured to exert a thrust force P against the cylinder block 1 15 along the axis of rotation 1 1 1.
- the hydraulic apparatus 100 comprises for example an elastic return element, such as a tension or compression spring, to push the distributor 1 16 against the cylinder block 1 15.
- the hydraulic apparatus 100 is furthermore provided with a sleeve 130 threaded onto the shaft 1 12.
- the sleeve 130 is rotatably mounted around the shaft 1 12. At a first of its ends, the sleeve 130 is locked in translation by a shoulder 1 17 formed in the shaft 1 12. At a second end of its ends, the sleeve 130 forms an axial abutment surface 1 18 against which the cylinder block 1 15 is pushed, when the distributor 1 16 exerts the thrust force P against the cylinder block 1 15.
- a shoulder 141 is also formed in the cylinder block 1 15 so as to accommodate the second end of the sleeve 130.
- the cylinder block 1 15 therefore extends around the second end of the sleeve 130.
- the distributor 1 16 pushes the cylinder block 1 15 against the abutment surface 1 18 axial sleeve 130, the thrust force P is transmitted to the shaft 1 12 via the sleeve 130 and the shoulder 1 17 of said shaft 1 12.
- the hydraulic apparatus 100 comprises a clutch system configured to engage the shaft 1 12 in an engaged configuration (FIG. 6) and to disengage the shaft 1 12 in a disengaged configuration ( Figure 7).
- the hydraulic apparatus 100 rotates the shaft January 12, while in the disengaged configuration, the hydraulic apparatus 100 can not drive the shaft 1 12 in rotation.
- the clutch system comprises for example a splined clutch ring 145 which, in the engaged configuration, is mounted on both the shaft 1 12 and on the sleeve 130, so that the hydraulic apparatus 100 rotates both the shaft 1 12 and the sleeve 130, and which, in the disengaged configuration, is mounted only on the sleeve 130, so that the hydraulic apparatus 100 causes rotation only of the sleeve 130 and not that of the shaft 1 12, the sleeve 130 and the shaft 1 12 being free in rotation relative to each other.
- the splined clutch ring 145 extends partly around the shaft 1 12, in particular the shoulder 1 17 of the shaft 1 12, and the first end of the sleeve 130.
- the splined clutch ring 145 no longer extends around the first end of the sleeve 130.
- the splined clutch ring 145 is configured to move from one configuration to another by translation along the axis of rotation 11 1.
- the splined clutch ring 145 is for example controlled in translation by a control cylinder of the clutch system. This makes it possible to couple or uncouple the hydraulic apparatus 100 from the shaft 1 12.
- the hydraulic apparatus 100 also comprises a set 121 of first mechanical bearings comprising at least a first mechanical bearing 121a, 121b and an assembly 122 of second mechanical bearings comprising at least a second mechanical bearing 122a, 122b, 122c by means of which shaft 1 12 and cover 1 13 are mounted rotating relative to each other.
- first mechanical bearings 121a, 121b and at least one of the second mechanical bearings 122a, 122b are mounted in radial contact with the shaft 1 12 on the one hand and the lid 1 13 on the other hand .
- the assembly 121 of first mechanical bearings comprises two first mechanical bearings 121a, 121b disposed on either side of the distribution assembly, in particular of the cylinder block 1 15 and the In other words, one 121 has first mechanical bearings is arranged opposite the distributor 1 16 relative to the cylinder block 1 15 and the other 121 b of the first mechanical bearings is arranged at the the first mechanical bearings 121a, 121b are in direct radial contact with the shaft 1 12 and the cover 1 13.
- the first mechanical bearings 121a, 121b are right contact ball bearings each comprising an outer cage and an inner cage between which balls are mounted.
- the first mechanical bearings 121 are for example deep groove ball bearings.
- the right contact ball bearings 121a, 121b are configured to take axial forces of low amplitude with respect to the thrust force P.
- the set 122 of second mechanical bearings is configured to take up the thrust force P exerted by the distributor 1 16.
- the assembly 122 of second mechanical bearings comprises a tapered roller bearing 122a having an inner race and an outer race between which conical rollers are mounted.
- the second mechanical bearing 122a is positioned on a first side of the distribution assembly disposed in the thrust direction of the distributor 1 16 against the cylinder block 1 15.
- the set 122 of second mechanical rollers is arranged opposite the distributor 1 16 relative to the cylinder block 1 15.
- the tapered roller bearing 122a is arranged such that the axial resultant of the thrust force exerted by the tapered rollers on the inner race of the tapered roller bearing 122a is in the opposite direction to the thrust force P of the distributor 1 16 in the cylinder block 1 15.
- the tapered roller bearing 122a is positioned so that its center of thrust C on the axis of rotation 11 January 1 is shifted towards the dispensing assembly.
- the tapered roller bearing 122a is in radial contact with the shaft 1 12 via the sleeve 130 on the one hand and with the lid 1 13 on the other hand.
- Axially opposite sides of the inner race of the second mechanical bearing 122a are respectively mounted in axial contact with the shaft 1 12, via the sleeve 130, and the cylinder block 1 15, while one side of the outer race of the second bearing mechanical 122a, opposite the cylinder block 1 15 according to the axis of rotation 1 1 1, is mounted in axial contact with the cover 1 13.
- a shoulder 131 is for example formed in the sleeve 130 to form a stop surface against which the inner race of the second mechanical bearing 122a is mounted in axial contact. It will be understood that such an assembly makes it possible to ensure the recovery of the thrust force P exerted by the distributor 1 16 on the cylinder block 1 15, and which is transmitted to the shaft 1 12.
- the tapered roller bearing 122a is mounted without axial clearance between the shaft 1 12 and the cover 1 13, so as to ensure the recovery of the axial forces in the hydraulic apparatus 100 and in particular to prevent the tapered roller bearing 122a does not dissociate.
- the hydraulic apparatus 100 is for example dimensioned so that the tapered roller bearing 122a is mounted without axial play between the latter and the shaft 1 12 / the cover 1 13.
- an elastic ring 142 may be inserted in a groove in the sleeve 130, facing the side of the inner cage of the tapered roller bearing in contact with the cylinder block 1 15, and a preload washer 143 is positioned between the elastic ring 142 and said side of the inner race, so as to mount the tapered roller bearing 122a without axial play.
- a shoulder 144 may also be provided in the cylinder block 1 to accommodate the elastic ring 142 and the preload washer 143.
- axially opposite sides of the inner race of the first mechanical bearing 121 located on the first side of the distribution assembly are both mounted in axial contact with the shaft 1. even, axially opposite sides of the outer race of the first mechanical bearing 121a located on the first side of the distribution assembly, are both mounted in axial contact with the cover 1 13.
- axially opposite sides of the inner race of the first mechanical bearing 121b located on a second side of the dispensing assembly, opposite the first side, are both mounted in axial contact with the shaft 1 12, while that none of the axially opposite sides of the outer cage is in axial contact with the cover 1 13 or the shaft 1 12.
- One of the axially opposite sides of the inner race of the first mechanical bearing 121 b is for example mounted in axial contact with the shaft 1 12 by means of an elastic ring 132 inserted into a groove in the shaft 1 12.
- the hydraulic apparatus 100 is configured to operate with two displacement cylinders.
- the hydraulic apparatus 100 comprises a cylinder of displacement selection, allowing the passage of a displacement to the other.
- This drawer can be a symmetrical drawer, that is to say that the hydraulic apparatus 100 has no preferential direction (same behavior in forward and reverse of the vehicle when the hydraulic apparatus 100 is a motor).
- the set 122 of second mechanical bearings comprises a needle bearing 122b having an outer cage and an inner cage between which needles are mounted, and a cylindrical roller stopper 122c having a first cage and a second cage between which cylindrical rollers are mounted.
- the inner race of the needle bearing 122b is in radial contact with the shaft January 12 via the sleeve 130, while its outer cage is in direct radial contact with the cover January 13.
- Axially opposite sides of the inner race of the needle bearing 122b are respectively mounted in axial contact with the shaft January 12, via the sleeve 130 and for example the shoulder 131 formed in said sleeve 130, and the cover 1 13, by example by means of an elastic ring 133 inserted into a groove in the cover 1 13.
- Axially opposite sides of the outer race of the needle bearing 122b are both mounted in axial contact with the cover 1 13, for example by means of a shoulder 134 forming an abutment surface formed in the cover 1 13 on the one hand, and on the other hand via the elastic ring 133 of the cover 1 13.
- the needle bearing 122b makes it possible to align the sleeve 130 and the cover 1 13.
- the first cage of the cylindrical roller thrust 122c is mounted in axial contact with the cover 1 13 and the second cage of the cylindrical roller stop 122c is mounted in axial contact with the cylinder block 1 15.
- Radially opposite sides of the first cage and the second cage, respectively corresponding to the radially outer and radially inner sides of the first cage and the second cage, of the cylindrical roller stopper 122c are respectively mounted in radial contact with the lid 1 13 and the cylinder block 1 15.
- a groove 135 is for example formed in the cover 1 13 to receive the first cage of the cylindrical roller stop 122c.
- a shoulder 136 is for example formed in the cylinder block 1 15 to receive the second cage of the cylindrical roller thrust 122c.
- the cylindrical roller thrust 122c makes it possible to absorb the thrust force P exerted by the distributor 1 16 on the cylinder block 1 15, and which is transmitted to the shaft 1 12.
- the cylindrical roller stop 122c is mounted without axial clearance between the cover 1 13 and the cylinder block 1 15, so as to ensure the recovery of the axial forces in the hydraulic apparatus 100 and in particular to prevent the cylindrical roller thrust 122c does not dissociate.
- the hydraulic apparatus 100 is dimensioned so that the cylindrical roller stopper 122c is mounted without axial play between the latter and the cover 1 13 / the cylinder block 1 15.
- the cylindrical roller stopper 122c has an inner diameter greater than the inner diameter of the needle bearing 122b so that the two bearings 122b, 122c are arranged concentrically, the cylindrical roller stopper 122c extending for example at least part around the needle bearing 122b.
- the hydraulic devices 10, 100 illustrated in FIGS. 2 to 1 1 have the advantage of ensuring a recovery of the thrust force P of the distributor 16 against the cylinder block 15, 1 15, while making it possible to reduce the force of preload applied to mechanical bearings 21 and 22; 121 and 122 and thus reduce their drag, and thus increase their life.
- the axial dimension of such hydraulic devices 10, 100 can be reduced, since the ball bearings have a reduced axial dimension compared to the axial dimension of a tapered roller bearing.
- ball bearings have the advantage of being less expensive and lighter than tapered roller bearings.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Reciprocating Pumps (AREA)
- Hydraulic Motors (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1462670A FR3030645B1 (fr) | 2014-12-17 | 2014-12-17 | Appareil hydraulique a pistons radiaux |
PCT/EP2015/080353 WO2016097216A1 (fr) | 2014-12-17 | 2015-12-17 | Appareil hydraulique a pistons radiaux comprenant au moins un roulement a billes |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3234359A1 true EP3234359A1 (fr) | 2017-10-25 |
EP3234359B1 EP3234359B1 (fr) | 2019-07-10 |
Family
ID=52988188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15820105.3A Active EP3234359B1 (fr) | 2014-12-17 | 2015-12-17 | Appareil hydraulique a pistons radiaux comprenant au moins un roulement a billes |
Country Status (5)
Country | Link |
---|---|
US (1) | US10578084B2 (fr) |
EP (1) | EP3234359B1 (fr) |
CN (1) | CN107429674B (fr) |
FR (1) | FR3030645B1 (fr) |
WO (1) | WO2016097216A1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110296840A (zh) * | 2019-07-25 | 2019-10-01 | 洛阳Lyc轴承有限公司 | 一种汽车圆锥滚子轴承油脂润滑试验装置 |
FI130485B (en) * | 2021-08-12 | 2023-09-29 | Black Bruin Oy | RADIAL PISTON HYDRAULIC MOTOR WITH A HOLLOW ROTATING SHAFT WITHIN THE MOTOR |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1563866A (fr) * | 1968-02-07 | 1969-04-18 | ||
US3760691A (en) * | 1971-12-17 | 1973-09-25 | Deere & Co | Step variable displacement hydraulic motor |
FR2481755A1 (fr) * | 1980-04-30 | 1981-11-06 | Poclain Hydraulics Sa | Moteur a fluide sous pression muni d'un dispositif de selection de sa vitesse de rotation |
AU566382B2 (en) * | 1982-12-24 | 1987-10-15 | Renold Plc | Cam driven piston pump with variable capacity control |
DE3500432A1 (de) * | 1985-01-09 | 1986-07-10 | Manfred Ing.(grad.) 4320 Hattingen Fischbach | Schnellaufende hochdruck-wasser-radialkolbenpumpe, insbesondere fuer den untertagebetrieb |
FR2588616B1 (fr) * | 1985-10-16 | 1988-01-08 | Poclain Hydraulics Sa | Mecanisme, moteur a pompe, a au moins deux cylindrees actives distinctes. |
FR2611816B1 (fr) * | 1987-02-25 | 1989-07-13 | Poclain Hydraulics Sa | Mecanisme a fluide sous pression, moteur ou pompe, a plusieurs cylindrees |
CN1024584C (zh) * | 1990-03-12 | 1994-05-18 | 佳木斯工学院 | 新型推力向心滚动轴承 |
FR2678322B1 (fr) * | 1991-06-25 | 1993-10-29 | Poclain Hydraulics Sa | Mecanisme a fluide sous pression comportant au moins deux cylindrees distinctes de fonctionnement. |
FI104014B (fi) * | 1994-05-18 | 1999-10-29 | Valmet Voimansiirto Oy | Radiaalimäntähydraulimoottori ja menetelmä radiaalihydraulimoottorin säätämiseksi |
DE19832696A1 (de) * | 1998-07-21 | 2000-01-27 | Mannesmann Rexroth Ag | Radialkolbenmaschine mit Rollenführungen |
WO2001077495A1 (fr) * | 2000-04-11 | 2001-10-18 | Mannesmann Rexroth Ag | Machine a piston radiaux |
CN2483525Y (zh) * | 2001-06-26 | 2002-03-27 | 朱云亭 | 高压大流量径向柱塞泵 |
CN202381534U (zh) * | 2011-12-24 | 2012-08-15 | 洛阳轴研科技股份有限公司 | 滚针和圆柱滚子组合轴承 |
FR2996267B1 (fr) * | 2012-09-28 | 2014-10-03 | Poclain Hydraulics Ind | Appareil hydraulique presentant une structure amelioree pour sa mise en cylindree |
-
2014
- 2014-12-17 FR FR1462670A patent/FR3030645B1/fr not_active Expired - Fee Related
-
2015
- 2015-12-17 US US15/536,108 patent/US10578084B2/en active Active
- 2015-12-17 WO PCT/EP2015/080353 patent/WO2016097216A1/fr active Application Filing
- 2015-12-17 EP EP15820105.3A patent/EP3234359B1/fr active Active
- 2015-12-17 CN CN201580076198.4A patent/CN107429674B/zh active Active
Also Published As
Publication number | Publication date |
---|---|
FR3030645B1 (fr) | 2019-10-11 |
FR3030645A1 (fr) | 2016-06-24 |
US10578084B2 (en) | 2020-03-03 |
WO2016097216A1 (fr) | 2016-06-23 |
CN107429674B (zh) | 2020-04-28 |
CN107429674A (zh) | 2017-12-01 |
EP3234359B1 (fr) | 2019-07-10 |
US20170335831A1 (en) | 2017-11-23 |
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