WO2012023155A1 - 電液一体型液圧装置 - Google Patents
電液一体型液圧装置 Download PDFInfo
- Publication number
- WO2012023155A1 WO2012023155A1 PCT/JP2010/005079 JP2010005079W WO2012023155A1 WO 2012023155 A1 WO2012023155 A1 WO 2012023155A1 JP 2010005079 W JP2010005079 W JP 2010005079W WO 2012023155 A1 WO2012023155 A1 WO 2012023155A1
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- WIPO (PCT)
- Prior art keywords
- rotor
- hydraulic
- rotating shaft
- casing
- housing
- Prior art date
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- 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
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0644—Component parts
- F03C1/0663—Casings, housings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
-
- 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
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0602—Component parts, details
- F03C1/0607—Driven means
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- 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
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/061—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F03C1/0623—Details, component parts
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- 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
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0644—Component parts
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- 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
- F03C1/06—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis
- F03C1/0636—Reciprocating-piston liquid engines with multiple-cylinders, characterised by the number or arrangement of cylinders with cylinder axes generally coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F03C1/0644—Component parts
- F03C1/0647—Particularities in the contacting area between cylinder barrel and valve plate
- F03C1/0649—Bearing means
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- 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
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/128—Driving means
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- 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
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
- F04B1/141—Details or component parts
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- 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
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
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- 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
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2021—Details or component parts characterised by the contact area between cylinder barrel and valve plate
- F04B1/2028—Bearings
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- 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
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2064—Housings
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- 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
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/20—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having rotary cylinder block
- F04B1/2014—Details or component parts
- F04B1/2078—Swash plates
- F04B1/2085—Bearings for swash plates or driving axles
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- 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
- F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
- F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
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- 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
- F04B2201/00—Pump parameters
- F04B2201/08—Cylinder or housing parameters
- F04B2201/0805—Rotational speed of a rotating cylinder block
Definitions
- the present invention includes a hydraulic rotary machine having a rotary shaft, wherein the rotary shaft rotates by supplying hydraulic fluid, or discharges hydraulic fluid according to the rotation of the rotary shaft, and rotation connected to the rotary shaft BACKGROUND OF THE INVENTION 1.
- the present invention relates to an electro-hydraulic integrated hydraulic device including a rotor and an electric rotator having a stator disposed around the rotor, and includes, for example, a hydraulic motor / hydraulic pump and an electric motor / generator.
- the present invention relates to an electro-oil integrated motor / pump.
- an electric motor is driven by passing an electric current through its stator or rotor. Therefore, when the oil to be filled in the casing contains impurities and contaminants showing conductivity and magnetism such as iron powder, the casing An electric or magnetic short circuit occurs in the stator or rotor arranged inside, and the electric motor stops operating. Therefore, the oil to be used is limited to non-conductive and non-magnetic oil with high cleanliness that does not contain impurities and contaminants.
- hydraulic oil leaks from minute gaps between the components, and lubrication of bearings and the like provided in the hydraulic motor is performed by this hydraulic oil. Therefore, the working oil is filled in the casing.
- this hydraulic oil is used as a cooling or lubricating oil, but there is a problem of electrical and magnetic short-circuits as described above, so the hydraulic oil to be used is limited.
- an object of the present invention is to provide an electro-hydraulic integrated hydraulic device with few restrictions on the types of hydraulic fluid that can be used.
- An electro-hydraulic integrated hydraulic device includes a hydraulic rotating machine in which a rotating shaft protruding from a casing rotates by supplying hydraulic fluid, or discharges hydraulic fluid in accordance with rotation of the rotating shaft; A power generation function for converting the rotational energy of the rotary shaft of the rotary press to electric energy, or an electric rotary machine having an electric function for driving the rotary shaft of the hydraulic rotary press when the electrical energy is applied, A rotor connected to the rotating shaft, a stator disposed around the rotor, and a housing in which the rotor and the stator are accommodated, the rotor and the housing being The housing is arranged so as to surround the casing, and the housing has a first accommodation space in which a rotating shaft protruding from the casing is accommodated, and a second accommodation space in which the stator is accommodated. The has, inside the housing, in which the sealing member that isolates the said first housing space and the second housing space is provided.
- the present invention it is possible to prevent the hydraulic fluid in the casing from flowing into the second storage space by the seal member even if the hydraulic fluid passes through the rotation shaft and is guided to the first storage space. Thereby, it can prevent that the hydraulic fluid which has electroconductivity or magnetism flows into between a rotor and a stator, and the performance of an electric rotating machine falls.
- the hydraulic fluid which has electroconductivity or magnetism can also be used, the kind of hydraulic fluid which can be used can be expanded.
- the rotor is rotatably provided on the casing via a first bearing member, and the bearing member is disposed on the first space side.
- this hydraulic fluid can be utilized for lubrication of the bearing member of a rotor by arrange
- the electro-hydraulic integrated hydraulic device further includes an input / output shaft for inputting or outputting rotational force, the input / output shaft is formed integrally with the rotor, and the rotating shaft is The rotor is engaged with the rotor in a relatively non-rotatable manner, and the rotor has a bottomed cylindrical shape, and is provided in the casing so as to close the through hole of the casing from which the rotating shaft projects, and the seal member Is preferably provided between the inner periphery of the rotor and the outer periphery of the casing.
- the external device and the electric rotating machine can be directly connected, energy efficiency can be improved, and assembly accuracy can be set low.
- a rotor is provided so as to close the through hole of the casing, and a seal member is provided between the inner peripheral portion of the rotor and the outer peripheral portion of the casing, so that it is guided into the housing through the through hole. It is possible to prevent the hydraulic fluid from flowing out into the second storage space. Moreover, since the outflow of the hydraulic fluid guided into the housing through the through hole by one seal member can be stopped, the number of parts can be suppressed, and the configuration of the electric rotating machine can be simplified.
- the rotating shaft passes through the rotor and the housing and protrudes outward from the housing, and the rotor and the rotating shaft are engaged with each other so as not to be relatively rotatable. Is preferred. If the said structure is followed, an external apparatus and a hydraulic rotary machine can be connected directly, energy efficiency can improve, and an assembly precision can be set low.
- the rotor has a cylindrical shape, and one end side and the other end side of the rotor are rotatably provided in the casing and the housing via the different bearing members.
- the rotor since one end side and the other end side of the rotor are respectively supported by the bearing members, the rotor can be stably rotated.
- the industrial machine according to the present invention includes any one of the above electro-hydraulic integrated hydraulic devices. If the said structure is followed, what is equipped with the electrohydraulic integrated hydraulic apparatus which has the above effects
- actions is realizable.
- the mechanical efficiency can be improved, and the operating noise can be reduced and the cost can be reduced.
- FIG. 1 is a diagram showing a rotary drive device 2 including an electric oil integrated motor 1 according to a first embodiment of the present invention.
- FIG. 2 is an enlarged view of the electric oil integrated motor 1.
- An electro-oil integrated motor 1 that is an electro-hydraulic integrated hydraulic device is provided in a rotation drive device 2 that rotationally drives a rotating object in a construction machine, a ship, a land device, or the like.
- the construction machine is a construction machine such as a hydraulic excavator, a crane, or a bulldozer
- the land equipment is a hydraulic unit, a press machine, an iron making machine, an injection molding machine, or the like.
- the electro-oil integrated motor 1 is connected to a speed reduction device 3 provided in the rotation drive device 2, and rotationally drives a rotating object via the speed reduction device 3.
- the electric oil integrated motor 1 includes a hydraulic rotating machine 10 that rotates a rotating shaft 11 with hydraulic oil and an electric rotating machine 30 that rotates an output shaft 31 with electricity, and these are integrally provided.
- the hydraulic rotating machine 10 can rotate the rotating shaft 11 by supplying hydraulic oil, and is a hydraulic motor such as a constant capacity swash plate type piston motor.
- the hydraulic rotating machine 10 can operate as a hydraulic pump that sucks and discharges the pressure oil by rotating the rotating shaft 11. That is, the hydraulic rotating machine 10 is configured as a hydraulic motor / pump. In the following description, the hydraulic rotating machine 10 will be described as a hydraulic motor for convenience of explanation.
- a hydraulic motor 10 that is a hydraulic rotating machine 10 includes a rotating shaft 11, a cylinder block 12, a plurality of pistons 13, a plurality of shoes 14, a swash plate 15, and a valve plate 16, which are attached to a casing 17. Contained.
- the rotary shaft 11 is disposed in the casing 17, and one end portion thereof protrudes from the through hole 17 b of the casing 17. And the part and the other end part of the one end part side of the rotating shaft 11 are each supported by the casing 17 via the bearings 18 and 19 so that rotation is possible.
- a cylinder block 12 is fitted on the other end of the rotating shaft 11.
- the cylinder block 12 is generally formed in a cylindrical shape, and is coupled to the rotating shaft 11 by spline coupling or the like, so that the rotating shaft 11 and the cylinder block 12 are not relatively rotatable.
- the cylinder block 12 has a plurality of piston chambers 21 formed therein.
- the plurality of piston chambers 21 are formed at equal intervals in the circumferential direction.
- Each piston chamber 21 has one end opened at one end of the cylinder block 12 and the other end opened at the other end of the cylinder block 12 via the cylinder port 22.
- a piston 13 is inserted into each piston chamber 21 from one end side.
- the piston 13 is fitted in the piston chamber 21 and reciprocates in the piston chamber 21. At least one end 13 a of the piston 13 protrudes from the piston chamber 21.
- One end portion 13a of the piston 13 has an outer surface formed in a spherical shape, and a shoe 14 is attached thereto.
- the shoe 14 is generally formed in a bottomed cylindrical shape, and its inner surface is a partial spherical shape. In this portion, one end 13a of the piston 13 is fitted, and the one end 13a rotates around its center point. Further, a flange 14 a that protrudes outward is formed on the outer peripheral surface of the bottom side of the shoe 14.
- the swash plate 15 is generally formed in a disc shape.
- the swash plate 15 is inserted into the rotating shaft 11 and is disposed on the one end side of the rotating shaft 11 with respect to the cylinder block 12. ing.
- the swash plate 15 has a support surface 23 on the surface facing the cylinder block 12, and a plurality of shoes 14 are arranged on the support surface 23.
- the plurality of shoes 14 arranged on the support surface 23 are pressed against the support surface 23 by a pressing plate 24 provided on the rotating shaft 11.
- the pressing plate 24 is generally formed in an annular shape.
- a spherical bush 25 having an inner peripheral portion of the pressing plate 24 formed between the cylinder block 12 and the swash plate 15 is fitted into the pressing plate 24 and supported by the outer peripheral surface of the spherical bush 25.
- the presser plate 24 faces the support surface 23 of the swash plate 15, and holds the shoe 14 on the support surface 23 with the presser plate 24 and the support surface 23 sandwiching the flange 14 a of the shoe 14.
- the shoe 14 held in this way is formed with an oil passage 14b penetrating from the inner surface toward the support surface 23.
- the piston 13 is formed with an oil passage 13c that penetrates through the one end 13a to reach the other end 13b. Therefore, the hydraulic oil in the piston chamber 21 is supplied to the support surface 23 so that the shoe 14 can smoothly move on the support surface 23. Further, the hydraulic oil transmitted on the support surface 23 accumulates in the casing 17 and is used as a lubricating oil in order to smoothly rotate the rotary shaft 11.
- the valve plate 16 is fixed to the inner peripheral surface of the casing 17.
- the valve plate 16 is generally formed in a disc shape.
- the valve plate 16 is inserted into the other end side of the rotating shaft 11 so as to be relatively rotatable, and one surface in the thickness direction faces the other end of the cylinder block 12 and abuts in a state where a seal is achieved.
- the valve plate 16 is formed with a suction port 26 and a discharge port 27 formed in an arc shape at intervals in the circumferential direction.
- Several piston chambers 21 are connected to each suction port 26 and discharge port 27. Each piston chamber 21 is formed to be alternately connected to the suction port 26 and the discharge port 27 as the cylinder block 12 rotates. 1 and 2, the positions of the suction port 26 and the discharge port 27 are shifted in the circumferential direction for easy understanding (the same applies to FIGS. 4 to 6 described later).
- hydraulic oil is supplied to the piston chamber 21 via the suction port 26, and the supplied hydraulic oil is discharged from the piston chamber 21 via the discharge port 27, whereby the piston 13 reciprocates. Since the swash plate 15 and the holding plate 24 are tilted, when the piston 13 reciprocates, the shoe 14 slides on the swash plate 15 and the cylinder block 12 rotates about the axis L1. Since the rotation shaft 11 cannot rotate relative to the cylinder block 12, the rotation shaft 11 also rotates in conjunction with the cylinder block 12.
- the hydraulic motor 10 configured in this manner is integrally provided with an electric motor 30.
- FIG. 3 is an enlarged sectional view showing a part of the electric motor 30 in an enlarged manner.
- the electric rotating machine 30 has an electric function of rotating by supplying electricity thereto.
- the electric rotating machine 30 also has a power generation function for converting the energy of rotation into electric energy by rotating the output shaft 31. That is, the electric rotating machine 30 is configured as an electric motor / generator having an electric function and a power generation function. In the following description, the electric rotating machine 30 will be described as an electric motor for convenience of explanation.
- the electric motor 30 which is an electric rotating machine is a so-called three-phase synchronous motor.
- the electric motor 30 includes an output shaft 31, a rotor 32, and a stator 33, and these are accommodated in a housing 34 formed in a bottomed cylindrical shape.
- the housing 34 is formed in a bottomed cylindrical shape, and is provided in the casing 17 so as to cover the outer peripheral surface of the hydraulic motor 10.
- An outward flange portion 17a protruding outward in the radial direction is formed in the middle portion of the outer peripheral surface of the casing 17 in the radial direction, and the open end portion 34a of the housing 34 is fixed to the outward flange portion 17a.
- the electric motor 30 is covered so as to cover the outer peripheral surface of the hydraulic motor 10, The hydraulic motor 10 and the electric motor 30 are integrally provided.
- the output shaft 31 has one end projecting from the bottom of the housing 34 and connected to the speed reducer 3. One end of the output shaft 31 is rotatably supported by the housing 34 via a bearing 35, and the other end is integrated with the rotor 32.
- the output shaft 31 and the rotor 32 are configured as an integrated product, but may be configured as separate products and integrated by fastening with a fastener such as a screw.
- the rotor 32 has an iron core 32a formed in a bottomed cylindrical shape.
- An output shaft 31 is provided integrally on the outer bottom surface of the iron core 32a, and is arranged so that their axes coincide with each other.
- One end of the casing 17 is inserted inside the iron core 32 a, and the iron core 32 a is rotatably provided on the outer peripheral surface of the casing 17 via a bearing 36.
- the iron core 32a is provided so as to cover the casing 17 and cover the through hole 17b.
- the iron core 32a is connected to the inside of the casing 17 through the through hole 17b, and a rotation shaft accommodation space 51 (corresponding to a first accommodation space) capable of accommodating the rotation shaft 11 is formed therein.
- a recess 37 is formed on the inner bottom surface of the iron core 32a so that the rotating shaft 11 of the inserted hydraulic motor 10 can be inserted.
- a plurality of key grooves 37a for spline coupling extending in parallel to the axis L1 are formed on the inner peripheral surface of the recess 37 at intervals in the circumferential direction.
- a plurality of keys 11a corresponding to the plurality of key grooves 37a are formed at one end of the rotary shaft 11, and the plurality of keys 11a extend in parallel to the axis L1 and are spaced apart in the circumferential direction. Open and formed.
- the key groove 37a and the key 11a are designed such that a valley portion of the key groove 37a and a tip portion of the key 11a are separated from each other by a predetermined distance d in the radial direction. Accordingly, a gap S is formed between the key groove 37a and the key 11a, and relative displacement of the rotary shaft 11 with respect to the rotor 32 in the recess 37 can be allowed.
- the spline joint part 38 is comprised by the key groove 37a and the key 11a.
- the spline joint portion 38 By configuring the spline joint portion 38 in this manner, the rotation of the rotating shaft 11 and the rotation of the rotor 32 can be interlocked, and the axial vibration generated in the rotating shaft 11 is transmitted to the rotor 32. Can be suppressed. Further, since the relative displacement is allowed by the radial gap S formed in the spline joint portion 38, it is possible to suppress the transmission of the radial vibration generated in the rotating shaft 11 to the rotor 32. Accordingly, the distance between the rotor 32 and the stator 33 can be kept substantially constant, and the function and reliability of the electric motor 30 can be prevented from being lowered due to the vibration of the hydraulic motor 11. In addition, there is no need to provide other members such as a vibration isolator for preventing vibration, and the number of parts can be reduced and the cost can be reduced.
- a permanent magnet 32b is provided on the outer peripheral surface portion of the iron core 32a, and a cylindrical stator accommodating space 52 surrounded by the iron core 32a and the housing 34 is formed outside the permanent magnet 32b.
- a stator 33 is disposed in the stator housing space 52, which is the second housing space, so as to cover the permanent magnet 32b.
- the stator 33 is configured by winding a stator coil around a cylindrical stator core, and is fixed to the inner peripheral surface of the housing 34.
- the inner peripheral surface of the stator 33 is disposed so as to face the outer peripheral surface of the permanent magnet 32 b, and the stator 33 is disposed so as to cover one end portion of the hydraulic motor 10.
- the electric motor 30 configured in this manner is arranged so as to cover the hydraulic motor 10, the rotor 32 and the stator 33 are enlarged in diameter and become a low rotation specification. That is, the optimum rotational speed of the electric motor 30 changes to a low speed.
- a transmission mechanism such as a speed reducer or a speed increaser for adjusting the rotation speeds of the hydraulic motor 10 and the electric motor 30 can be omitted. Therefore, it is possible to reduce the size of the electro-oil integrated motor 1 and to prevent mechanical loss due to the transmission mechanism, so that it is possible to improve the mechanical efficiency, reduce the operating noise due to the speed reducer, etc. Cost reduction associated with the reduction in the number of points can be performed.
- the electric oil integrated motor 1 can drive both the hydraulic motor 10 and the electric motor 30.
- the hydraulic oil 10 is supplied to the suction port 26 of the hydraulic motor 10 and predetermined electric power is supplied to the stator 33.
- the rotor 32 is rotated by the rotational force received from the rotary shaft 11 and the rotational force received from the stator 33.
- the electro-oil integrated motor 1 configured as described above prevents the vibration from being transmitted to the rotor 32 because the electric motor 30 is attached to the outer peripheral portion of the hydraulic motor 10 with little influence of internal vibration via the bearing 36. In addition, it is not necessary to form a member for receiving the bearing 36, and the configuration of the electric motor 30 can be simplified.
- the hydraulic motor 10 and the electric motor 30 can be firmly connected by using the spline joint portion 38.
- high acceleration and high vibration can be obtained in a harsher environment than that of the conventional technology. It can also be used in numbers.
- the through-hole 17 b formed in the casing 17 is formed to have a larger diameter than the rotating shaft 11, and the lubricating oil in the casing 17 moves from around the rotating shaft 11 to the rotating shaft in the rotor 32. It is guided to the accommodation space 51.
- the bearing 36 is lubricated by the lubricating oil guided to the rotating shaft housing space 51, and the rotor 32 rotates smoothly.
- the electro-oil integrated motor 1 can be used under conditions severer than before, for example, with a heavy load and a long time operation.
- the 1st seal member 39 is provided in the outer peripheral part of the one end side of the casing 17 with which the iron core 32a is covered between the inner peripheral parts of the iron core 32a.
- the first seal member 39 isolates the rotary shaft accommodating space 51 and the stator accommodating space 52 so that the lubricating oil does not leak into the stator accommodating space 52. Since the rotor 32 is provided so as to cover the outer peripheral portion of the one end side of the casing 17 in this way, it is possible to prevent the lubricating oil from leaking into the stator accommodating space 52 with one seal member 39. The number of points can be reduced, and the configuration of the electric motor 30 can be simplified.
- the bearing 36 is provided on the rotary shaft housing space side 51 (that is, the left side of the first seal member 39 in FIGS. 1 and 2).
- the bearing 36 is provided on the rotary shaft housing space side 51 (that is, the left side of the first seal member 39 in FIGS. 1 and 2).
- the output shaft 31 has a second seal member 40 that seals between the output shaft 31 and the bottom of the housing 34.
- the second seal member 40 is provided on the inner side of the bearing 35 and can prevent the lubricating oil from entering from the outside, specifically from the inside of the reduction gear 3.
- the bearing 35 is disposed outside the second seal member 40 so as to be lubricated by the lubricating oil from the outside. Thereby, the bearing 35 can also be lubricated with lubricating oil.
- FIG. 4 is a cross-sectional view showing an electro-oil integrated motor 1A of the second embodiment.
- the electro-oil integrated motor 1A of the second embodiment is similar in configuration to the electro-oil integrated motor 1 of the first embodiment.
- the configuration different from the electro-oil integrated motor 1 of the first embodiment will be described for the configuration of the electro-oil integrated motor 1A, and the same components are denoted by the same reference numerals and description thereof is omitted.
- the electro-oil integrated motor 1A does not include the bearing 35 that supports the output shaft 31.
- the output shaft 31 is rotatably supported by a bearing 35 provided in the reduction gear 3.
- FIG. 5 is a cross-sectional view showing an electro-oil integrated motor 1B of the third embodiment.
- the electro-oil integrated motor 1B of the third embodiment is similar in configuration to the electro-oil integrated motor 1A of the second embodiment.
- the configuration different from the electro-oil integrated motor 1A of the second embodiment will be described for the configuration of the electro-oil integrated motor 1B.
- the output shaft 31 of the electric motor 30 and the rotor 32 are formed as separate bodies, and the output shaft 31 is formed integrally with the rotating shaft 11 of the hydraulic motor 10. That is, the rotation output shaft 11 ⁇ / b> B extends to the reduction gear 3 through the rotor 32 and the bottom of the housing 34, and is connected to the reduction gear 3.
- a second seal member 40 is provided between the bottom of the housing 34 and the rotation output shaft 11B.
- a key 11a is formed on the outer peripheral surface of the rotation output shaft 11B at a portion passing through the rotor 32, and a key groove 37a is formed on the iron core 32a of the rotor 32 so as to correspond to the key 11a.
- a spline joint portion 38 is configured by the key 11a and the key groove 37a, and the rotation output shaft 11B and the rotor 32 are engaged.
- a third seal member 43 is provided between the rotor 32 and the housing 34.
- An inner space of the rotor 32 is a rotation shaft accommodation space 51 between the two seal members 39 and 43, and the bearing 36 is disposed in the rotation shaft accommodation space 51.
- the rotating shaft accommodation space 51 and the stator accommodation space 52 are isolated. Thereby, the lubricating oil can be prevented from flowing into the stator housing space 52 and the bearing 36 can be lubricated with the lubricating oil.
- the shape of the rotor 32 is simplified by separating the output shaft 31 and the rotor 32 from each other. As a result, vibrations in the axial direction and radial direction of the rotary output shaft 11 can be prevented from being transmitted to the rotor 32, and the assembly accuracy of this portion can be set low.
- the electro-oil integrated motor 1B has the same operational effects as the electro-oil integrated motors 1 and 1A of the first and second embodiments.
- FIG. 6 is a cross-sectional view showing an electro-oil integrated motor 1 ⁇ / b> C of the fourth embodiment.
- the electro-oil integrated motor 1C of the fourth embodiment is similar in configuration to the electro-oil integrated motor 1B of the third embodiment.
- 1C of electro-oil integrated motors only the structure different from the electro-oil integrated motor 1B of 2nd Embodiment is demonstrated, and the same code
- the rotor 32 ⁇ / b> C of the electric motor 30 ⁇ / b> C has a cylindrical iron core 41.
- the iron core 41 has an inward flange portion 41a that protrudes inward in the radial direction at an intermediate portion of the inner peripheral surface thereof.
- the rotation output shaft 11B is inserted through the through hole 41b defined by the tip of the inward flange portion 41a.
- On the outer peripheral surface of the rotation output shaft 11B a plurality of keys 11a are formed at intervals corresponding to the through holes 41b in the circumferential direction, and a plurality of key grooves 37a are spaced apart in the circumferential direction in the through holes 41b. Open and formed.
- one end of the hydraulic motor 10 is inserted from one opening of the iron core 41, and one end of the iron core 41 rotates on the outer peripheral surface of the hydraulic motor 10 via a bearing 36. It is possible.
- a cylindrical support portion 34b extending inwardly from the other opening of the iron core 41 so as to surround the rotation output shaft 11B from the bottom portion of the housing 34 is inserted, and the other end portion of the iron core 41 is the support portion. It can be rotated via a bearing 42 at 34b.
- the rotor 32C can be stably rotated.
- a first seal member 39 is provided near one opening of the iron core 41 between one end of the iron core 41 and the outer peripheral surface of the hydraulic motor 10, and the other end of the iron core 41 is located near the other opening.
- An annular third seal member 43 is provided between the support portion 34b and the support portion 34b.
- a space between the two seal members 39 and 43 is a rotation shaft accommodation space 51, and the bearings 36 and 42 are disposed in the rotation shaft accommodation space 51.
- the electro-oil integrated motor 1C has the same operational effects as the electro-oil integrated motors 1, 1B, 1C of the first to third embodiments.
- the electro-oil integrated motor 1 including the hydraulic motor 10 is described, but the present invention is not limited to the hydraulic motor. Any motor that is driven by hydraulic fluid such as water may be used.
- a hydraulic pump may be used instead of the hydraulic motor 10.
- the rotating shaft 11 is rotated by rotating the rotor 32 by the electric motor 30.
- hydraulic fluid can be discharged from a hydraulic pump.
- a generator may be used instead of the electric motor 30.
- the rotating shaft 11 is rotated by the hydraulic motor 10 to rotate the rotor.
- an electromotive force is generated in the stator 33 and the generator generates power.
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Abstract
Description
上記構成に従えば、外部機器と液圧回転機とを直接接続することができ、エネルギー効率が向上し、組立て精度を低く設定することができる。
図1は、本発明の第1実施形態の電油一体型モータ1を備える回転駆動装置2を示す図である。図2は、電油一体型モータ1を拡大して示す図面である。電液一体型液圧装置である電油一体型モータ1は、建設機械、船舶及び陸用装置等において、回転対象物を回転駆動する回転駆動装置2に備わっている。なお、建設機械とは、油圧ショベル、クレーン及びブルドーザ等の建設機械であり、陸用装置は、油圧ユニット、プレス機、製鉄機械及び射出成形機等である。電油一体型モータ1は、回転駆動装置2に備わる減速装置3に連結されており、減速装置3を介して回転対象物を回転駆動する。電油一体型モータ1は、作動油により回転軸11を回転させる液圧回転機10と、電気により出力軸31を回転させる電気回転機30とを備え、これらが一体的に設けられている。
液圧回転機10は、作動油を供給することにより回転軸11を回転可能になっており、例えば定容量形の斜板式ピストンモータのような油圧モータである。また、液圧回転機10は、回転軸11を回転させることで圧油を吸引して吐出する油圧ポンプとして動作可能になっている。つまり、液圧回転機10は、油圧モータ/ポンプとして構成されている。以下の説明では、説明の便宜上、液圧回転機10を油圧モータとして説明する。
図3は、電動機30の一部を拡大して示す拡大断面図である。以下では、図1及び2も参照しつつ説明する。電気回転機30は、そこに電気を供給することで回転する電動機能を有している。また、電気回転機30は、その出力軸31を回転させることで、その回転のエネルギーを電気エネルギーへと変換する発電機能も有している。つまり、電気回転機30は、電動機能と発電機能を有する電動機/発電機として構成されている。以下の説明では、説明の便宜上、電気回転機30が電動機として説明する。
電油一体型モータ1では、油圧モータ10の吸入ポート26に作動油を供給することで、シリンダブロック12が回転し、それに連動して回転軸11が回転する。回転軸11が回転すると、スプライン結合された回転子32が回転し、それに伴って出力軸31が回転する。これにより、減速装置3を駆動させることになる。また、電油一体型モータ1は、電動機30によっても回転させることができ、固定子33に所定の電気を供給することで、回転子32が回転し、それに伴って出力軸31が回転する。
電油一体型モータ1では、ケーシング17に形成されている貫通孔17bが回転軸11よりも大径に形成され、ケーシング17内の潤滑油が回転軸11の周りから回転子32内の回転軸収容空間51へと導かれるようになっている。回転軸収容空間51に導かれた潤滑油によりベアリング36が潤滑され、回転子32の回転が円滑になる。
この第1シール部材39に対して、ベアリング36は、回転軸収容空間側51(つまり図1及び2において、第1シール部材39の左側)に設けられている。このように配置することで、ベアリング36に潤滑油を供給しつつ、固定子33及び永久磁石32bとの間に潤滑油が導かれることを阻止できる。これにより、導電性あるいは磁性を有する作動液も使用できるので、使用可能な作動液の種類を広げられ得る。また、潤滑油に起因する電動機30の信頼性及び機能の低下を防ぎつつ、前述する潤滑材の供給や従来よりも過酷な条件下での駆動を実現することができる。
図4は、第2実施形態の電油一体型モータ1Aを示す断面図である。第2実施形態の電油一体型モータ1Aは、第1実施形態の電油一体型モータ1と構成が類似している。以下では、電油一体型モータ1Aの構成について、第1実施形態の電油一体型モータ1と異なる構成についてだけ説明し、同じ構成については同一の符号を付して説明を省略する。
図5は、第3実施形態の電油一体型モータ1Bを示す断面図である。第3実施形態の電油一体型モータ1Bは、第2実施形態の電油一体型モータ1Aと構成が類似している。以下では、電油一体型モータ1Bの構成について、第2実施形態の電油一体型モータ1Aと異なる構成についてだけ説明し、同じ構成については同一の符号を付して説明を省略する。
また、回転子32とハウジング34の間には第3シール部材43が設けられている。回転子32の内側空間は、2つのシール部材39、43の間で回転軸収容空間51になっており、ベアリング36は、この回転軸収容空間51内に配置されている。このように第1シール部材39と第3シール部材43を設けることで回転軸収容空間51と固定子収容空間52とが隔離される。これにより、固定子収容空間52に潤滑油が流入を防止できると共に、ベアリング36を潤滑油により潤滑することができる。
図6は、第4実施形態の電油一体型モータ1Cを示す断面図である。第4実施形態の電油一体型モータ1Cは、第3実施形態の電油一体型モータ1Bと構成が類似している。以下では、電油一体型モータ1Cの構成について、第2実施形態の電油一体型モータ1Bと異なる構成についてだけ説明し、同じ構成については同一の符号を付して説明を省略する。
[その他の構成]
本実施形態では、油圧モータ10を備える電油一体型モータ1について説明しているけれども、油圧モータに限定されるものではない。水等の作動液で駆動するモータであればよい。また、油圧モータ10に代えて油圧ポンプを用いてもよい。この場合、電動機30により回転子32を回転させて回転軸11を回転させる。これにより、油圧ポンプから作動油を吐出させることができる。また、電動機30に代えて発電機を用いてもよい。この場合、油圧モータ10により回転軸11を回転させて回転子を回転させる。これにより固定子33に起電力が発生し、発電機が発電する。
2 駆動装置
3 減速装置
10 油圧モータ
11 回転軸
11a キー
11B 回転出力軸
17 ケーシング
30,30C 電動機
31 出力軸
32,32C 回転子
33 固定子
34 ハウジング
35,36,42 ベアリング
37a キー溝
38 スプライン継手部
39 第1シール部材
40 第2シール部材
43 第3シール部材
Claims (6)
- そのケーシングから突出している回転軸が作動液の供給により回転する、又は前記回転軸の回転に応じて作動液を吐出する液圧回転機と、
液圧回転機の回転軸の回転エネルギーを電気エネルギーに変換する発電機能、又は電気エネルギーを与えると液圧回転機の回転軸を駆動する電動機能を有する電気回転機とを備え、
前記電気回転機は、前記回転軸に接続される回転子と、前記回転子の周りに配置される固定子と、前記回転子及び前記固定子が収容されるハウジングとを有し、
前記回転子及びハウジングは、前記ケーシングを外囲するように配置され、
前記ハウジングは、その中に前記ケーシングから突出している回転軸が収容されている第1の収容空間と、前記固定子が収容されている第2の収容空間とを有し、
前記ハウジング内には、前記第1の収容空間と前記第2の収容空間とを隔離するシール部材が設けられている、電液一体型液圧装置。 - 前記回転子は、前記ケーシングに第1の軸受部材を介して回動可能に設けられており、
前記軸受部材は、前記第1の空間側に配置されている、請求項1に記載の電液一体型液圧装置。 - 回転力を入力又は出力するための入出力軸を更に備え、
前記入出力軸は、前記回転子に一体的に形成され、
前記回転軸は、前記回転子に相対回転不能に係合され、
前記回転子は、有底筒状になっており、前記回転軸が突出する前記ケーシングの貫通孔を塞ぐように前記ケーシングに設けられ、
前記シール部材は、前記回転子の内周部と前記ケーシングの外周部との間に設けられている、請求項1又は2に記載の電液一体型液圧装置。 - 前記回転軸は、前記回転子及び前記ハウジングを貫通し、前記ハウジングの外方に突出しており、
前記回転子と前記回転軸とは、互いに相対回転不能に係合している、請求項2に記載の電液一体型液圧装置。 - 前記回転子は、筒状になっており、その一端側及び他端側が夫々異なる前記軸受部材を介して前記ケーシング及びハウジングに夫々回転可能に設けられている、請求項4に記載の電液一体型液圧装置。
- 請求項1乃至5の何れか1つに記載の電液一体型液圧装置を備える産業機械。
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JP2011524091A JP5204901B2 (ja) | 2010-08-17 | 2010-08-17 | 電液一体型液圧装置 |
KR1020117022064A KR101212894B1 (ko) | 2010-08-17 | 2010-08-17 | 전액(電液) 일체형 액압 장치 |
CN201080032469.3A CN102510950B (zh) | 2010-08-17 | 2010-08-17 | 电液一体型液压装置 |
EP10856115.0A EP2607696B1 (en) | 2010-08-17 | 2010-08-17 | Integrated electro-hydraulic device |
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KR101212894B1 (ko) | 2012-12-14 |
JP5204901B2 (ja) | 2013-06-05 |
EP2607696B1 (en) | 2019-10-02 |
US20130177394A1 (en) | 2013-07-11 |
EP2607696A4 (en) | 2016-11-23 |
US9000602B2 (en) | 2015-04-07 |
CN102510950B (zh) | 2014-09-24 |
KR20120061767A (ko) | 2012-06-13 |
JPWO2012023155A1 (ja) | 2013-10-28 |
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