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
  • F03C1/02—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
  • 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
  • F03C1/0409—Cams
• • 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
  • F03C1/0428—Supporting and guiding means for the pistons
• • 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
  • F03C1/0474—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 two or more radial piston/cylinder units in series
  • F03C1/0476—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 two or more radial piston/cylinder units in series directly located side by side
• • 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
  • F04B1/0413—Cams
• • 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
  • F04B1/0472—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 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
  • F04B1/047—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
  • F04B1/0474—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 with two or more serially arranged radial piston-cylinder units
  • F04B1/0476—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 with two or more serially arranged radial piston-cylinder units located side-by-side
• • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
  • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
  • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
  • Y10T29/00—Metal working
  • Y10T29/49—Method of mechanical manufacture
  • Y10T29/49229—Prime mover or fluid pump making
  • Y10T29/49236—Fluid pump or compressor making

Definitions

• the present invention relates to the field of hydraulic motors.
• the present invention relates to the field of hydraulic motors with radial pistons.
• radial piston hydraulic motors of the aforementioned type generally comprise in a housing 10 comprising two half-housings 10a and 10b and a cam 20:
• said multilobe cam 20 preferably formed on the inner surface of an element 22 of the casing 10,
• a distributor 60 adapted to successively apply in a controlled manner a fluid under pressure on the pistons 50, so that the successive pressing of the pistons 50 on the lobes of the cam 20 causes the relative rotation of the cylinder block 30 and the elements which are connected relative to the housing 10.
• the cam 20 is fixed by bolting between the two housings 10a and 10b, and the shaft 40, carried by the housing 10b, itself carries the block -cylinders 30.
• the pistons are stapled in the cylinders and are thus held in their housing when the cylinder block is inserted into the cam.
• the distributor 60 is held in place in the housing 10a by angular positioning means.
• Such a subset constituting an incomplete motor is intended to be inserted into the kinematic chain of a user by engagement on a shaft and / or on a complementary housing element 10b that can contain a bearing.
• this subassembly comprises rotating elements and fixed elements (for example respectively a cylinder block and a distributor on the one hand, and a cam on the other hand).
• rotating elements and fixed elements for example respectively a cylinder block and a distributor on the one hand, and a cam on the other hand.
• rotating elements and complementary fixed elements for example respectively a shaft on the one hand and a housing element comprising a bearing on the other hand.
• Such a set is generally referred to as a hydrobase by the Applicant.
• the hydrobase Before fixing the hydrobase to a shaft and a half-casing may or may not contain a bearing, it can not be maintained in the mounted state as shown in Figure 3a. In reality, it is in the form of a collection of unrelated pieces, as in Figure 3b.
• the cam 20 is not connected to the lid 10a, and the cylinder block 30 is not held in place.
• a main object of the present invention is to improve the means known in the state of the art to facilitate in particular the engagement of such subsets on a shaft or bearing.
• Another object of the invention is to provide a hydrobase in assembled and sealed form, prior to its mounting on a subassembly comprising a shaft and a housing that can contain a bearing, thus allowing its transport without damage or pollution, and with prepositioned elements according to the arrangement chosen by the manufacturer.
• the present invention applies in particular to the case of implantation of a motor having a fixed shaft relative to the frame of the machine and a rotary housing, for example integral with a wheel.
• subassembly intended to form a hydraulic motor after assembly on an assembly comprising a shaft
• subassembly comprises a cover forming a housing element, a cam multilobe, a cylinder block placed opposite the cam, pistons guided to radial sliding in respective cylinders of the cylinder block and bearing on the lobes of the cam and a distributor for successively applying a fluid under pressure on said pistons, characterized in that it comprises means for temporarily fixing the cylinder block on the lid and means for accessing a dispenser element, through the cover, to allow, during installation, the angular orientation of the this element relative to the shaft, then its attachment to the shaft.
• the subassembly or hydrobase comprises means ensuring a pre- angular positioning and / or fixing of the cam on the lid, for example by means of pins or screws.
• the present invention also relates to a method of assembling the subassembly or hydrobase according to the present invention, to form a hydraulic motor.
• FIG. 1 previously described represents a longitudinal sectional view of a hydraulic motor known from the state of the art according to the section planes referenced I-I in FIG. 2,
• FIG. 2 represents a cross-sectional view of the same hydraulic motor according to the section plane referenced II-II in FIG. 1;
• FIG. 3a previously described is a longitudinal sectional view of the arrangement of parts of a known hydrobase of the state of the art in assembled form, and before assembly to a subassembly comprising a shaft and a crankcase element .
• FIG. 3b represents a view of the collection of parts constituting a hydrobase before their assembly
• FIG. 4 represents a longitudinal cross-sectional view of the axis 0-0 of a hydrobase according to one embodiment of the present invention, and in particular illustrating a means for temporarily fixing the cylinder block on the lid,
• FIG. 5 shows a longitudinal sectional view of a hydrobase according to an embodiment of the present invention, according to a different sectional plane of Figure 4, and illustrates in particular the final attachment of a dispenser part on a tree,
• FIGS. 6 and 7 are perspective views of two embodiments of a hydrobase according to the present invention and more specifically illustrate two particular embodiments of the means of access through the lid to an element of the dispenser in order to allow the angular orientation of this element during installation
• FIG. 8 represents a partial exploded perspective view of a hydrobase according to the present invention and more precisely illustrates angular indexing means between the cam and the lid of a hydrobase according to the present invention
• FIGS. 9 and 10 represent two lateral lateral views, transverse and axial respectively, of a single hydrobase according to the present invention, assembled by its provisional fixing means and closed by a closing plate, and
• FIG. 11 to 26 show successive views illustrating a method of assembling a hydrobase according to the present invention on an assembly comprising a shaft and a housing member of a machine to be equipped.
• the subassembly or hydrobase essentially comprises a cover housing element 100, a cam 200, a cylinder block 300 and a distributor 600.
• Each of these elements cover 100, cam 200, cylinder block 300 and distributor 600 may be the subject of many embodiments known in themselves to those skilled in the art corresponding to conventional hydraulic motors and hydrobases, piston engines radial and multilobe cams, also called high torque and low speed motors.
• hydrobase according to the present invention is centered on a 0-0 axis of rotation.
• the lid 100 constitutes a tight wall transverse to the axis 0-0 which covers a complete lateral side of the hydrobase. Its contour is preferably circular.
• the cam 200 is preferably formed of a ring 201 adjacent to the axially inner face of the cover 100 at the radially outermost peripheral zone of the cover 100. On its radially inner surface, the cam 200 has, as can be seen for example in FIG. 8, a series of regular lobes 210 equi-distributed around the axis 0-0. Each of the lobes 210 generally has a sinusoidal type appearance.
• the cam 200 is connected to the cover 100. It is also attached to the rotating hub of the wheel of the machine that carries the rim.
• the cylinder block 300 is placed inside the ring 201 constituting the cam 200. It defines a plurality of cylinders 302 oriented radially with respect to the axis 0-0 and opening on the outer peripheral face of the cylinder block 300 in 200.
• a piston 500 is mounted to slide radially respectively in each of the cylinders 302. It bears on the radially inner surface of the cam 200.
• the cylinder block 300 has a central bore through which the cylinder block 300 is engaged on the end of the shaft of the machine to be equipped. Furthermore, this bore has a series of complementary longitudinal grooves splines 402 provided on the end of the shaft to provide angular indexing of the cylinder block 300 on the shaft, once the installed hydrobase.
• the distributor 600 is designed to apply in a controlled manner a fluid under pressure successively to each of the pistons 500, more precisely in the radially inner chamber of the cylinders 302 adjacent the pistons, so that the successive support of the pistons 500 on the lobes of the piston.
• cam 200 causes the relative rotation of the cylinder block 300 and the elements which are connected to it relative to the lid 100, when used on an equipped machine.
• the dispenser 600 is formed of two pieces: a central piece 610 or "against-ice” intended to be placed facing the end of the shaft and to be fixed thereto and an outer piece 620 or "ice” placed around the central piece 610, rotatably connected to the lid 100 by any appropriate means, for example a finger or a locking pin to allow longitudinal sliding between the outer piece 620 and the cover 100.
• the indexing means provided between the cover 100 and the part 620 may be formed of a mechanism such as an Oldham seal ensuring the transmission without play of a rotational movement between the cover 100 and the part 620 keeping their axes parallel but not necessarily concentric.
• a mechanism may be formed of a washer perpendicular to the axes of rotation comprising radial oblong slots which respectively receive pins integral with the cover 100 and pins integral with the outer part 620. This means allows a limited sliding along the directions perpendicular to the axis of the motor, while ensuring a precise angular setting.
• the outer part 620 has a transverse face 622 contiguous to a complementary face of the cylinder block.
• the central piece 610 has a series of channels having longitudinal sections 611, 612, 613 which open into respectively complementary channels 460, 462, 464 formed in the shaft 400 to provide the functions of supply and drain and cross sections. 614, 615 which open on the radially outer face of this central piece 610 at peripheral annular grooves, facing the outer part 620.
• the latter has channels with transverse sections which open opposite annular grooves related to the transverse sections 614, 615 of the central piece 610 and longitudinal sections which open opposite the supply ports formed in the piston chambers of the cylinder block 300.
• the channel 460 represents a supply channel of the distributor 600
• the channel 462 represents a channel carrying the return fluid of the distributor
• the channel 464 represents a drain channel which ensures the return of the leaks.
• the cylinder block 300 is rotatably connected to the shaft of the machine to be equipped and is rotatably fixed relative to the central part of the distributor 600.
• the shaft is of course not part of the hydrobase, and has been shown in Figures 4 and 5 for a better understanding of the hydraulic interface between the hydrobase and the rest of the machine.
• the feeding of the plunging chambers of the pistons by a fluid passing through channels formed in the shaft and the distributor ensure the rotational drive of the cam 200 relative to the cylinder block 300 and forming the cover 100, of the workpiece External distributor 620 and all the items related to them.
• the section of the longitudinal sections of the channels formed in the outer part 620 of the distributor evolves along the length of these sections, to generate, during the pressurization of the fluid, a force that forces the external part 620 to bear axially against the face facing the cylinder block 300 to ensure a relative seal at this level and prevent fluid leakage.
• the biasing of the outer part or ice 620 against the opposite side of the cylinder block 300 may be reinforced by springs 630. Such an arrangement improves the operation of the engine during the first moments after the application of the hydraulic pressure .
• the sealing at the level of the communication between the channels of the two parts, central 610 and external 620, of the distributor, is provided by seals or any equivalent means, for example segments made of cast iron or plastic.
• the hydrobase comprises means 150 of provisional fixing of the cylinder block 300 on the cover 100, as well as access means 180, through the cover 100, to an element of the distributor 600 in order to allow the angular orientation of this element during the installation with respect to the tree that receives the hydrobase.
• such temporary fixing means of the cylinder block 300 on the cover 100 are formed for example of two screws or bolts 152, 154 engaged in diametrically opposite bores. formed in the cover 100 opposite two respectively associated holes formed in the cylinder block 300.
• the means 180 allowing access to the distributor 600 through the cover 100 may be formed of different embodiments. They are preferably formed of an opening 182 formed in the center of the cover 100 and passing therethrough, associated with a closure flap 184 fixed on the cover 100 by any suitable removable means.
• closure flap 184 is fixed using an elastic ring 187 circlip type (TM) or any equivalent means.
• TM circlip type
• a seal 188 between the closure flap 184 and the opposite face of the lid 100 is furthermore provided with means of pre-positioning and / or fixing of the cam 200 on the cover 100, for example in the form of pins 202 or screws oriented parallel to the axis 0-0 and interfering with both the cam 200 and the cover 100.
• the presence of access means to the distributor 600 through the cover 100 angularly directs the distributor 600 to align it correctly with respect to supply channels and / or drains from the shaft.
• the hydrobase according to the present invention is further provided with plugs making it possible to seal all the bores made in the cover 100, in particular those intended to receive fastening means 152, 154.
• the bores mentioned above may serve as purge orifices for subsequent maintenance.
• the hydrobase is closed, before being installed on the associated shaft, by a plate 190 situated on the face of the cam 200 opposite to the cover 100.
• This plate 190 is fixed using any suitable means, for example using a plurality of bolts 192 and nuts 194 complementary.
• Such a plate 190 can also be the subject of many embodiments. It is preferably a simple flat disk of the same external diameter as the cam 200.
• the hydrobase, before assembly to the receiving machine, is as in Figures 9 and 10 in the form of a block preassembled by temporary fixing means.
• This block includes all the elements mentioned above, and already positioned relative to each other in their final mode of operation on the receiving machine, with the exception of the angular adjustment of the distributor with respect to the receiving shaft.
• the lid 100 of the hydrobase is for example intended to be secured to the movable rim of a wheel, the aforementioned complementary shaft being in turn fixed relative to the frame of a machine.
• the frame 410 of the machine and more specifically the output shaft 400 which preferably comprises longitudinal grooves 402 can be equipped with any suitable accessory, for example a ring 404 forming bearing.
• the hydrobase facing the frame preferably it is provided with support rods 450 parallel to the axis 0-0 engaged for example in complementary bores 412 formed in the frame 410 with a corresponding spacing to complementary bores formed in the hydrobase, more precisely through the cam 200 and the outer periphery of the lid 100.
• the hydrobase without its closure plate 190 can be engaged on the rods 450 to facilitate handling by transferring the weight of the hydrobase in part on the rods 450.
• the use of such rods 450 also facilitates the centering of the hydrobase on the axis of the shaft 400.
• the hydrobase is then pushed to axial sliding towards the corrugated shaft 400.
• the installer proceeds to a relative angular orientation of the hydrobase and the shaft 400 to engage the cylinder block 300 on said grooves 402 of the shaft 400.
• the temporary support rods 450 can then be removed as illustrated in FIG. 19 and replaced by bolts or fixing screws 110, 112 as shown in FIG.
• the hydrobase may be equipped with a stirrup 156 placed on the external surface of the lid 100, in diametrical position, and having at its ends eyelets in which are engaged the rods of the screws 152, 154. It is sufficient, once the screws 152, 154 loosened, remove the stirrup 156 to easily extract the screws 152, 154. The cylinder block 300 is then disengaged from the cover 100 to allow its relative rotation.
• the access means to the distributor 600 are thus also released. If necessary, it may be, as illustrated in FIGS. 21, 22, a temporary closure flap 185 released automatically when the caliper 156 is withdrawn.
• the installer then proceeds as shown in FIGS. 23 and 24 to the angular orientation of the distributor 600 with respect to the shaft 400 in order to align the supply and drain channels of the distributor element with respect to Channels formed in the shaft 400. Then, the distributor element 600 is fixed on the axial end of the shaft 400 by screws 602, 604.
• the present invention is not limited to the embodiments described above and illustrated in the accompanying figures, but extends to any variant within its spirit.
• the fixing means of the distributor element 600 called against ice on the axial end of the shaft, formed by several screws 602, 604 according to FIG. 24, can be replaced by a single bolt, to allow a saving of time of assembly, as well as a saving of place.
• the present invention makes it possible to avoid disassembly / reassembly of the components and saves installation time by improving the quality and reliability of the engine on the machine.
• the hydrobase according to the present invention forms a cartridge that can be used in particular from an end-of-line test bench until assembly on the machine of a user.
• the hydrobase according to the present invention can be equipped with any suitable accessory, for example a brake.
• the present invention allows rapid assembly of the hydrobase on any machine, as well as any disassembly that may be necessary and in complete safety. It guarantees thanks to the simplicity of the means proposed an operational package at the end of the assembly. It also allows easy maintenance.
• the hydrobase according to the present invention can be equipped with a hydraulic brake.
• a hydraulic brake being known in itself, it will not be described in detail later.

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• 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)

Applications Claiming Priority (2)

Publications (2)

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ID=43048828

Family Applications (1)

Country Status (5)

Cited By (5)

Families Citing this family (8)

Family Cites Families (10)

• 2010
  • 2010-02-01 FR FR1050667A patent/FR2955903B1/fr not_active Expired - Fee Related
• 2011
  • 2011-01-28 WO PCT/EP2011/051262 patent/WO2011092312A1/fr not_active Ceased
  • 2011-01-28 US US13/576,311 patent/US9284942B2/en active Active
  • 2011-01-28 EP EP11701822.6A patent/EP2531720B1/de active Active
  • 2011-01-28 CN CN201180016411.4A patent/CN102884308B/zh not_active Expired - Fee Related

Non-Patent Citations (1)

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