JP4818378B2 - Electro-hydraulic integrated hydraulic device - Google Patents

Description

  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. Field of the Invention The present invention relates to an electro-hydraulic integrated hydraulic device including an electric rotating machine having a child and a stator disposed around the rotor, for example, an electro-oil integrated motor including a hydraulic motor and an electric motor. .

  In construction machines, ships, land devices, etc., there are many examples in which a hydraulic motor or an electric motor is used for rotational driving. In recent years, attempts have been made to reduce energy consumption by using both a hydraulic motor and an electric motor. As an example, an electric oil integrated type in which the shaft of the hydraulic motor and the shaft of the electric motor are coupled together. A motor has been developed. (For example, see Patent Documents 1 and 2)

JP-A-2005-290882 JP 2007-192151 A

  However, the optimum rotational speed for driving is different between the hydraulic motor and the electric motor. In particular, when the electric oil integrated motor is reduced in size, it is preferable that the rotational speed of the electric motor be higher than that of the hydraulic motor. Therefore, just connecting with a joint as described above cannot absorb the difference between the optimal rotational speed of the electric motor and the optimal rotational speed of the hydraulic motor, and even if the electric oil integrated motor is downsized, It cannot be driven under suitable conditions. Therefore, in order to drive under suitable conditions, a transmission mechanism such as a speed reducer or a speed increaser must be provided between the rotating shaft and the rotor as in Patent Document 1, for example. However, since the structure of the transmission mechanism itself is complicated, the entire machine becomes large. In addition, if a transmission mechanism is provided, mechanical loss is increased by the transmission mechanism and mechanical efficiency is deteriorated. In addition, operating noise is increased by the transmission mechanism, and the cost is increased as the number of parts is increased.

  The basic structure is different between the hydraulic motor and the electric motor. For example, in a hydraulic motor, the output shaft bends due to the hydraulic reaction force, so a gap is formed between each component in advance, allowing relative displacement of each component. Is set low. On the other hand, in the electric motor, the relative displacement of each component is limited in order to accurately control the driving force due to the electromagnetic action, and the mounting accuracy of each component is set high. Therefore, the mounting accuracy of the component parts is greatly different between the hydraulic motor and the electric motor.

  In this way, the hydraulic motor and electric motor of the electro-hydraulic integrated motor have different requirements for mounting accuracy and support rigidity. Therefore, in order to obtain the required mounting accuracy and support rigidity, high-performance joints are used and the prevention is required. A vibration device must be provided. If it does so, an electro-oil integrated motor will enlarge, a number of parts will increase, and cost will increase.

  Accordingly, an object of the present invention is to provide a liquid electrolyte integrated liquid that can be reduced in size without impairing each function and reliability, and that can improve mechanical efficiency, reduce operating noise, and reduce costs. Is to provide a pressure device.

  The electro-hydraulic integrated hydraulic device of the present invention has a rotating shaft, and the rotating shaft rotates by supplying hydraulic fluid, or discharges hydraulic fluid according to the rotation of the rotating shaft; An electric rotating machine having a rotor connected to the rotating shaft and a stator disposed around the rotor, the electric rotating machine having an outer peripheral surface of the liquid rotating machine. The hydraulic rotary machine is placed so as to surround it.

  According to the present invention, the rotor has a large diameter, and the electric rotating machine can have a low rotation specification. Accordingly, the optimum rotational speeds of the hydraulic rotating machine and the electric rotating machine can be both reduced, and transmission mechanisms such as a speed reducer and a speed increasing machine for matching the rotational speeds can be omitted. As a result, it is possible to reduce the size of the electro-hydraulic integrated hydraulic device, to prevent the mechanical loss due to the transmission mechanism and to improve the mechanical efficiency, to reduce the operating noise due to the transmission mechanism, and to reduce the cost. It becomes possible.

  In the above invention, the rotor and the rotating shaft have a spline joint portion for spline coupling, and the spline joint portion is configured such that the rotor can be relatively displaced in the radial direction with respect to the rotating shaft. Preferably it is.

  If the said structure is followed, since a spline joint part accept | permits the relative displacement of the radial direction with respect to the rotating shaft of a rotor, it can suppress that the vibration of the radial direction produced on a rotating shaft is transmitted to a rotor. Further, it is possible to suppress transmission of axial vibration generated in the rotating shaft to the rotor by the spline joint portion. Thereby, it can prevent impairing each function and reliability of an electric rotary machine and a hydraulic rotary machine.

  Moreover, in the said structure, the relative displacement of the rotating shaft with respect to a rotor by eccentricity of a rotating shaft can be accept | permitted, and the difference in the attachment precision of a hydraulic rotating machine and an electric rotating machine can be absorbed. Therefore, the integration of the hydraulic rotating machine and the electric rotating machine can be realized without using another complicated joint member.

  In the above invention, it is preferable that the rotor is rotatably provided on an outer peripheral portion of the hydraulic rotating machine via a bearing.

  According to the above configuration, the vibration can be prevented from being transmitted to the rotor by attaching the bearing to the outer peripheral portion of the hydraulic rotating machine with little influence of internal vibration, and a member for receiving the bearing is formed. Therefore, the configuration of the electric rotating machine can be simplified.

  In the above invention, the hydraulic rotary machine stores therein lubricating oil for lubricating the rotary shaft, and the electric rotary machine has an inner side connected to an inner side of the hydraulic rotary machine. Preferably it is.

  If the said structure is followed, the lubricating oil stored in a hydraulic rotary machine can be guide | induced to an electric rotary machine, and it can utilize for lubrication of a rotor. This eliminates the need for semi-solid or paste-like lubricants such as grease as in conventional electric rotating machines, and enables use under harsher conditions (higher load and longer operation) than before. It becomes.

  In the above-mentioned invention, it is preferable to have a seal member that seals between the rotor and the stator. If the said structure is followed, lubricating oil will enter between a rotor and a stator, and it can prevent that the performance of an electric rotary machine falls.

  In the above invention, it is preferable that the rotating shaft passes through the electric rotating machine. If the said structure is followed, an external apparatus and a hydraulic rotary machine can be connected directly.

  In the above invention, it is preferable that a shaft portion of the rotor is integrally formed. According to the above configuration, the external device and the electric rotating machine can be directly connected.

  An industrial machine of the present invention includes any one of the above-described 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.

  According to the present invention, it is possible to improve mechanical efficiency, reduce operating noise, and reduce costs.

It is a figure which shows a drive device provided with the electro-oil integrated motor of 1st Embodiment of this invention. It is drawing which expands and shows an electro-oil integrated motor. It is an expanded sectional view which expands and shows a part of electric motor. It is sectional drawing which shows the electric oil integrated motor of 2nd Embodiment. It is sectional drawing which shows the electro-oil integrated motor of 3rd Embodiment. It is sectional drawing which shows the electro-oil integrated motor of 4th Embodiment.

(First embodiment)
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. The electro-oil integrated motor 1 is provided in a rotation drive device 2 that rotationally drives an object to be rotated in construction machines, ships, land devices, and the like. The construction machine is a construction machine such as a hydraulic excavator, a crane, or a bulldozer, and 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 motor 10 that rotates the rotating shaft 11 with hydraulic oil and an electric motor 30 that rotates the output shaft 31 with electricity, and these are integrally provided.

[Hydraulic motor]
The hydraulic motor 10 is a constant capacity swash plate type piston motor. The hydraulic motor 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 accommodated in a casing 17. The rotary shaft 11 is disposed in the casing 17 with one end protruding, and the one end portion and the other end of the rotary shaft 11 are supported by the casing 17 via bearings 18 and 19, respectively. ing. 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 rotary shaft 11 and is disposed on one end side of the rotary shaft 11 with respect to the cylinder block 12. The swash plate 15 is provided on the casing 17 by being tilted about an axis L2 perpendicular to the axis L1 of the rotary shaft 11. 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 holding plate 24 is formed in an approximately annular shape. A spherical bush 25 having an inner peripheral portion of the presser plate 24 formed between the cylinder block 12 and the swash plate 15 is fitted into the presser 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 14 b 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.

  A 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 valve plate 16 so as to be relatively rotatable on the other end side of the rotary shaft 11, and one surface in the thickness direction is opposed to the other end of the cylinder block 12 and is in contact with the seal. Yes. Further, 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).

  In the hydraulic motor 10, 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.

[Electric motor]
FIG. 3 is an enlarged sectional view showing a part of the electric motor 30 in an enlarged manner. Hereinafter, description will be made with reference to FIGS. The electric motor 30 is a so-called three-phase induction electric 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. Has been. By providing in this way, a portion on one end side of the hydraulic motor 10 (portion on which the rotating shaft 11 protrudes) is accommodated in the housing 34, and 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.

  One end of the output shaft 31 protrudes from the bottom of the housing 34 and is connected to the reduction gear 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. In the present embodiment, 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 hydraulic motor 10 is inserted inside the iron core 32a, and the iron core 32a is provided on the outer peripheral surface of the hydraulic motor 10 via a bearing 36 so as to be rotatable.

  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. In addition, 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. In addition, the spline joint part 38 is comprised by the key groove 37a and the key 11a.

  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.

  Furthermore, relative displacement of the rotating shaft 11 with respect to the rotor 32 caused by bending of the rotating shaft 11 due to a hydraulic reaction force or the like can be allowed by the spline joint portion 38 and the gap S. Thereby, the difference in the request | requirement of the mounting accuracy of the hydraulic motor 10 and the electric motor 30 can be absorbed. Therefore, the integration of the hydraulic motor 10 and the electric motor 30 can be realized without using another complicated joint member (for example, a universal joint).

  A cage-shaped conductor 32b is provided on the outer peripheral surface portion of the iron core 32a, and a stator 33 is fixed to the inner peripheral surface of the housing 34 so as to cover the cage-shaped conductor 32b. The stator 33 is formed by winding a stator coil around a stator core formed in a cylindrical shape. The inner peripheral surface of the stator 33 is disposed so as to face the outer peripheral surface of the conductor 32 b, and the stator 33 is disposed so as to cover one end portion of the hydraulic motor 10.

  Since 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 increased in diameter and become a low rotation specification. That is, the optimum rotational speed of the electric motor 30 changes to a low speed. Thereby, both the hydraulic motor 10 and the electric motor 30 can be rotated at a low speed, and a transmission mechanism such as a speed reducer or a speed increaser for adjusting the rotation speed 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.

[Operation of electro-oil integrated motor]
In the electric oil integrated motor 1, the hydraulic oil is supplied to the suction port 26 of the hydraulic motor 10, whereby the cylinder block 12 rotates and the rotary shaft 11 rotates in conjunction with the rotation. When the rotating shaft 11 rotates, the spline-coupled rotor 32 rotates and the output shaft 31 rotates accordingly. As a result, the reduction gear 3 is driven. The electric oil-integrated motor 1 can also be moved by flowing a three-phase alternating current through the electric motor 30. By flowing the three-phase alternating current through the stator 33 of the electric motor 30, the rotor 32 rotates, and accordingly. As a result, the output shaft 31 rotates.

  The electric oil integrated motor 1 can drive both the hydraulic motor 10 and the electric motor 30. In this case, the hydraulic oil 10 is supplied to the suction port 26 of the hydraulic motor 10 and three-phase AC is supplied to the stator 33. By flowing, the rotor 32 is rotated by the rotational force received from the rotating shaft 11 and the rotational force received from the stator 33. By driving both the hydraulic motor 10 and the electric motor 30 in this way, it is possible to reduce energy consumption.

  When the supply of the three-phase alternating current to the electric motor 30 is stopped and only the hydraulic motor 10 is driven, the electric motor 30 generates the three-phase alternating current at the stator 33. That is, the regenerative operation is performed in the electric motor 30, and the electric motor 30 can be used as a generator. Conversely, when the supply of hydraulic oil to the hydraulic motor 10 is stopped and only the electric motor 30 is driven, the compressed hydraulic oil is discharged from the discharge port 27 and the hydraulic motor 10 can be used as a hydraulic pump. .

  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.

  In the electro-oil integrated motor 1, the hydraulic motor 10 and the electric motor 30 can be firmly connected by using the spline joint portion 38. For example, 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.

[Lubrication structure]
In the electro-oil integrated motor 1, a through hole 17 b is formed with a larger diameter than the rotary shaft 11 so that one end of the rotary shaft 11 protrudes from the casing 17, and the housing 34 and the casing 17 are connected. Therefore, the lubricating oil in the casing 17 is guided from around the rotating shaft 11 into the housing 34, specifically, the iron core 32 a of the rotor 32. Each component of the electric motor 30, particularly the bearing 36, is lubricated by the lubricating oil introduced into the iron core 32 a of the rotor 32, so that the rotation of the rotor 32 becomes smooth.

  Thus, it is necessary to use a semi-solid or pasty lubricant such as grease by lubricating each component in the electric motor 30 with the lubricating oil stored in the hydraulic motor 10. Absent. Therefore, the electro-oil integrated motor 1 can be used under harsher conditions than conventional ones, for example, with a heavy load and a long time operation.

  Furthermore, the electro-oil integrated motor 1 includes an annular first seal member 39 that seals between the outer peripheral surface of the hydraulic motor 10 and the inner peripheral surface of the iron core 32a. The first seal member 39 is provided on the opening side of the iron core 32a from the bearing 36 (that is, on the right side in FIGS. 1 and 2). The first seal member 39 can keep the lubricating oil in the iron core 32a, and can prevent the lubricating oil from being guided between the stator 33 and the conductor 32b. Thereby, it can prevent that the reliability and function of the electric motor 30 fall with lubricating oil.

  The electro-oil integrated motor 1 has a second seal member 40 that seals between the bottom of the housing 34 and the output shaft 31 that passes through the bottom. 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.

(Second Embodiment)
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. Hereinafter, only 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, and does not include the second seal member 40. The output shaft 31 is rotatably supported by a bearing 35 provided in the reduction gear 3.

  Even with such a configuration of the electro-oil integrated motor 1A, the same effects as the electro-oil integrated motor 1 of the first embodiment can be obtained.

(Third embodiment)
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. Hereinafter, only 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, and the same components are denoted by the same reference numerals and description thereof is omitted.

  In the electro-oil integrated motor 1 </ b> B, 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 constituted by the key 11a and the key groove 37a.

  In the electro-oil integrated motor 1B configured as described above, since the rotary shaft 11 and the output shaft 31 are integrated, the mechanical loss when the force of the hydraulic motor 10 is transmitted to the reduction gear 3 can be suppressed. it can. Further, by separating the output shaft 31 and the rotor 32, the shape of the rotor 32 can be simplified.

  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.

(Fourth embodiment)
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. Hereinafter, only the configuration different from the electro-oil integrated motor 1B of the second embodiment will be described for the configuration of the electro-oil integrated motor 1C, and the same components are denoted by the same reference numerals and description thereof is omitted.

  In the electro-oil integrated motor 1 </ b> C, 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.

  In the rotor 32 </ b> C configured as described above, one end of the hydraulic motor 10 is inserted from one opening of the iron core 41, and the iron core 41 can be rotated on the outer peripheral surface of the hydraulic motor 10 via a bearing 36. ing. Also, a cylindrical support portion 34b extending inward from the other opening of the iron core 41 so as to surround the rotary output shaft 11B from the bottom portion of the housing 34 is inserted, and the iron core 41 is inserted into the support portion 34b with a bearing 42. It can be rotated through.

  Further, a first seal member 39 is provided between the iron core 41 and the outer peripheral surface of the hydraulic motor 10 near one opening of the iron core 41, and between the iron core 41 and the support portion 34b near the other opening. An annular third seal member 43 is provided. The first seal member 39 is provided on one opening side from the bearing 36, and the third seal member 43 is provided on the other opening side from the bearing 42. By providing the first and third seal members 39 and 43 in this way, the periphery of the stator 33 can be sealed, and the stator 33 can be separated from the lubricating oil.

  In addition, 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.

[Other configurations]
In the present embodiment, 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. Further, a hydraulic pump may be used instead of the hydraulic motor 10. In this case, the rotating shaft 11 is rotated by rotating the rotor 32 by the electric motor 30. Thereby, hydraulic fluid can be discharged from a hydraulic pump. Further, a generator may be used instead of the electric motor 30. In this case, the rotating shaft 11 is rotated by the hydraulic motor 10 to rotate the rotor. As a result, an electromotive force is generated in the stator 33 and the generator generates power.

  The present invention is not limited to the embodiments, and can be added, deleted, and changed without departing from the spirit of the invention.

1, 1A, 1B, 1C Electro-oil integrated motor 2 Driving device 3 Reduction device 10 Hydraulic motor 11 Rotating shaft 11a Key 11B Rotating output shaft 30, 30C Motor 31 Output shaft 32, 32C Rotor 33 Stator 35 Bearing 37a Keyway 38 Spline Joint 39 First Seal Member 40 Second Seal Member 43 Third Seal Member

Claims (7)

A hydraulic rotating machine that rotates the rotating shaft by supplying the working fluid, or discharges the working fluid according to the rotation of the rotating shaft;
An electric rotating machine having a rotor connected to the rotating shaft and a stator disposed around the rotor;
The electric rotating machine is covered with the hydraulic rotating machine so that the rotor surrounds an outer peripheral surface of the liquid rotating machine ,
The rotor and the rotation shaft have spline joint portions for spline coupling,
The electro-hydraulic integrated hydraulic device , wherein the spline joint portion is configured such that the rotor can be relatively displaced in a radial direction with respect to the rotating shaft . 2. The electro-hydraulic integrated hydraulic device according to claim 1, wherein the rotor is rotatably provided on an outer peripheral portion of the hydraulic rotating machine via a bearing. The hydraulic rotating machine stores lubricating oil for lubricating the rotating shaft inside thereof,
The electro-hydraulic integrated hydraulic device according to claim 1 or 2 , wherein an inner side of the electric rotating machine is connected to an inner side of the hydraulic rotating machine. The electrohydraulic integrated hydraulic device according to claim 3 , further comprising a seal member that seals between the rotor and the stator. The electro-hydraulic integrated hydraulic device according to any one of claims 1 to 4 , wherein the rotating shaft passes through the electric rotating machine. The electro-hydraulic integrated hydraulic device according to any one of claims 1 to 4 , wherein a shaft portion of the rotor is integrally formed. An industrial machine comprising the electrohydraulic integrated hydraulic device according to any one of claims 1 to 6 .

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