JP5123015B2 - Generator motor - Google Patents

Description

  The present invention relates to a generator motor mounted on a hybrid work vehicle, and more particularly to cooling of a generator motor.

  Conventionally, hybrid vehicles using both an engine and a generator motor (also referred to as a motor generator) have been used. When further assisting the driving force of the engine or driving the hybrid working vehicle with a motor, the generator motor can be operated as an electric motor.

  When it is necessary to add a load to the output torque of the engine or when the driving force returns from a transmission system or a hydraulic pump system to which the power from the engine is transmitted, the generator motor is Can work as. By using the generator motor as a generator, the returned driving force can be converted into electric power as regenerative energy and stored in a battery or the like. By converting the regenerative energy into electric power by the generator motor, it is possible to prevent the engine from being overloaded by the returned driving force.

  In addition, the generator motor is reduced in size by configuring the generator motor with a planetary gear mechanism. Even if the generator motor is reduced in size, it is necessary to rotate the rotor core of the generator motor at a high speed in order to increase the power generation amount of the generator motor. However, if the rotor core rotates at a high speed, the generator motor The energy density increases, and the amount of heat generated in the generator motor increases significantly.

  Therefore, the coils wound around the rotor core and stator of the generator motor are cooled, and lubrication is performed for spline coupling with the spline teeth formed on the gear section, bearing section, and engine output shaft of the planetary gear mechanism. It is necessary to keep it.

  As a configuration capable of cooling a generator motor or a motor equipped with a planetary gear mechanism, a generator motor (see Patent Document 1), a hybrid vehicle (see Patent Document 2), and the like have been proposed. As shown in FIG. 4, the generator motor described in Patent Document 1 has a configuration in which oil injected from a nozzle 53 collides with a recess 51 formed on the inner peripheral surface of a rotor core 50. Then, the oil colliding with the recess 51 is scattered in a granular form, and the coil part 52 and the rotor core 50 can be cooled.

  The hybrid vehicle described in Patent Document 2 uses the residual heat of oil that has cooled the electric motor as a preheating means for the engine. In the hybrid type vehicle described in Patent Document 2, the rotation from the engine 60 is transmitted to the input shaft 64 of the planetary gear mechanism 62 via the torque converter 63 as shown in FIG. Further, the rotor core 65 of the motor 61 is rotated by the rotation from the engine 60 transmitted to the input shaft 64.

  The rotation input from the input shaft 64 to the planetary gear mechanism 62 is transmitted to the output shaft 67, and is transmitted from the output shaft 67 to the drive shaft 74 via the counter drive gears 72 and 73. In the planetary gear mechanism 62, the rotation from the input shaft 64 is transmitted to the carrier 76 of the planetary gear mechanism 62. When the brake 77 for selectively fixing the sun gear 75 of the planetary gear mechanism 62 is opened, the rotation from the input shaft 64 is transmitted to the output shaft 67 as it is. When the brake 77 is engaged, the rotation from the input shaft 64 is accelerated by the planetary gear mechanism 62 and output from the output shaft 67.

Oil for cooling the coil 66 of the motor 61 is sucked from the oil reservoir 80 in the drive device case 71 by the hydraulic pump 78 and discharged to the oil passage 79. Oil discharged from the hydraulic pump 78 is supplied to the oil chambers 69a and 69b through the oil passage 79. The pressure oil supplied to the oil chambers 69a and 69b is discharged into the drive device case 71 to cool the coil 66. The oil that has cooled the coil 66 falls and returns to the oil reservoir 80 while cooling while lubricating the meshing portions of the gears, the sliding portions of the brake 77, the bearings, etc. in the transmission 70, the differential device 68, etc. .
JP 2008-7023 A JP-A-6-54409

  The generator motor disclosed in Patent Document 1 has a configuration in which a recess 51 and a nozzle 53 formed on the inner peripheral surface of the rotor core 50 are provided. For this reason, it becomes difficult to further reduce the size of the generator motor after a configuration with a planetary gear mechanism is provided.

  Further, since the hybrid vehicle disclosed in Patent Document 2 has a configuration in which cooling oil is poured from the upper part of the drive unit case 71, the cooling oil is forcibly supplied to the rotor core 65, the bearing, and the like. I could not. For this reason, it cannot be said that cooling and lubrication for these members are sufficient.

  In the present invention, the rotor core and the coil can be forcibly cooled, and the oil for lubrication and cooling can be forcibly supplied to the meshing portion and the bearing of the gear, and the size can be reduced. An object of the present invention is to provide a generator motor with a planetary gear mechanism that can be used.

The object of the present invention can be achieved by the inventions described in claims 1 and 2 .
That is, the present invention is a generator motor mounted on a hybrid work vehicle, which is arranged in series with the generator motor on an engine output shaft and transmits the speed to the rotor core of the generator motor by increasing the engine rotation speed. Equipped with a gear mechanism,
The engine output shaft is formed at the center of the engine output shaft and is formed at a central oil passage extending in the axial direction of the engine output shaft, at a plurality of different portions in the axial direction of the engine output shaft, and A radiating oil passage penetrating in a radial direction from a central oil passage, and a communication oil passage for communicating the central oil passage with an oil supply port formed in a motor housing of the generator motor,
Spline teeth are formed at least at one end of the engine output shaft, an opening of the central oil passage is formed at the end where the spline teeth are formed, and an orifice is formed at the opening. The most important feature is that pressurized oil is supplied to the oil supply port.

In the generator motor of the present invention, the planetary gear mechanism is configured to have a smaller diameter than the coil inner diameter of the generator motor, and is arranged closer to the rotor core than the coil end of the generator motor. A sun gear provided on a rotation shaft of the rotor core that is rotatable with respect to the engine output shaft, a planet gear that is supported by a carrier to which rotation from the engine output shaft is transmitted, and meshes with the sun gear; And a ring gear meshing with the planetary gear and fixed to the motor housing.

  In the present invention, the cooling and lubricating oil press-fitted from the oil supply port formed in the motor housing of the generator motor can be first forcedly introduced into the central oil passage formed at the shaft center of the engine output shaft. Thus, the oil introduced into the central oil passage is discharged outward from the radiating oil passage by the action of centrifugal force accompanying the rotation of the engine output shaft. And design the outlet position of each radiant oil path so that the oil discharged from the outlet of the radiant oil path is supplied to the rotor core, bearings, meshing part of gear and coil wound around the stator part. I can leave.

  Since it is configured in this way, it becomes possible to supply oil evenly to the rotor core, the bearing, the meshing portion of the gear, the coil wound around the stator portion, etc., and cooling and lubrication of each of these members It can be performed. Therefore, even if the rotor core of the generator motor is rotated at a high speed, the amount of heat generated by the high-speed rotation of the rotor core can be sufficiently removed, and oil is forcibly supplied to the rotating part and the meshing part. Therefore, lubrication corresponding to high-speed rotation can be performed uniformly.

In the present invention, a central oil passage opening is formed at the end of the engine output shaft on which spline teeth are formed, and an orifice is formed in the opening to prevent a significant pressure decrease in the central oil passage. Therefore, by forming an orifice at the opening, it is possible to prevent a decrease in the flow rate of the oil discharged from each radiating oil passage.
Further, since the oil that has flowed out through the orifice can be supplied to the meshing portion of the spline teeth, the lubrication state at the meshing portion of the spline teeth can be kept good.

  Furthermore, in the present invention, the planetary gear mechanism can be configured to have a smaller diameter than the coil inner diameter of the generator motor, and the planetary gear mechanism can be disposed closer to the rotor core than the coil end of the generator motor. Thereby, the width dimension of the generator motor in the longitudinal direction of the engine output shaft can be shortened, and the generator motor can be reduced in size even with the configuration including the planetary gear mechanism.

Further, as a configuration of the planetary gear mechanism, the ring gear can be fixed and the rotation from the engine output shaft can be transmitted to the carrier. By comprising in this way, the sun gear which rotates integrally with a rotor core can be rotated at high speed. Moreover, the planetary gear mechanism can be made compact so that the rotor core can be rotated at a high speed so that the planetary gear mechanism can be arranged closer to the rotor core than the coil end of the generator motor.
Thus, since the planetary gear mechanism can be configured compactly and the rotor core can be rotated at high speed, the power generation amount of the miniaturized generator motor can be significantly increased.

  Preferred embodiments of the present invention will be specifically described below with reference to the accompanying drawings. As the configuration of the generator motor of the present invention, in addition to the shape and arrangement described below, if the shape and arrangement can solve the problems of the present invention, these shapes and arrangement can be adopted. It can be done. For this reason, this invention is not limited to the Example demonstrated below, A various change is possible.

  FIG. 1: has shown the schematic diagram of the whole system comprised using the generator motor concerning embodiment of this invention, and FIG. 2 is sectional drawing which shows the internal structure of a generator motor. FIG. 3 is an enlarged view of the upper half side of the cross-sectional view shown in FIG. 2, and makes it easy to see the reference numerals attached to the respective members constituting the internal structure of the generator motor.

  As shown in FIG. 1, a generator motor 2 having a configuration directly connected to the engine 1, a transmission system to which power from the engine 1 is transmitted, a hydraulic pump system, and the like are arranged. A load member for an engine such as a transmission system or a hydraulic pump system is denoted by reference numeral 3 in FIG. The generator motor 2 and the load member 3 for the engine are configured such that the respective shafts are linearly arranged.

  An engine output shaft 11 (see FIGS. 2 and 3) of the engine 1 is provided with power take-out means 7 for taking out power from the engine 1 outside. As the power take-out means 7, a conventionally known construction such as a construction for taking out power by combining a plurality of gears or a construction for taking out power by driving a belt can be adopted. The circulation pump 6 can be driven by the power extracted by the power extraction means 7. The circulation pump 6 supplies oil, which cools or lubricates constituent members in the generator motor 2 described later, into the generator motor 2.

  When the hydraulic pump system is configured as the load member 3, the circulation pump 6 should be configured as one hydraulic pump in the hydraulic pump system without using the power extraction means 7 to extract power. You can also. Alternatively, an external independent electric pump can be configured as the circulation pump 6.

  By the way, although the structure which arrange | positions each axis | shaft in the generator motor 2 and the load member 3 with respect to an engine linearly with the engine output shaft 11 is shown in FIG. 1, it is not limited to this structure, Instead, It may be configured to be arranged in parallel with the engine output shaft 11 via the power take-out means 7.

  The oil supplied from the circulation pump 6 into the casing 18 housing the generator motor 2 is stored in the casing 18 after cooling a desired member or performing lubrication. The oil stored in the casing 18 is sucked by the suction force of the circulation pump 6. Before being sucked and introduced into the circulation pump 6, the oil is cooled by passing through the heat exchanger 5. Accordingly, the cooled oil can be discharged from the circulation pump 6.

  The electric power generated by the generator motor 2 is converted from AC electricity to DC electricity via the inverter 9 and stored in a capacitor (not shown). Further, when the power from the engine 1 is assisted by the generator motor 2, the generator motor 2 can be operated as an electric motor. At this time, the DC electricity stored in the battery is converted into AC electricity by the inverter 9 and supplied to the generator motor 2.

Next, the configuration in the generator motor 2 will be described with reference to FIGS. In particular, reference numerals indicating members in the generator motor 2 are shown in detail in FIG.
The engine output shaft 11 includes a first engine output shaft 11a directly connected to the engine and a second engine output shaft 11b connected via the flywheel 10. A flywheel 10 is attached to the first engine output shaft 11a via a bolt, and an attachment member 45 is attached to the flywheel 10 via a bolt. A concave spline is formed on the inner peripheral surface of the mounting member 45, and the concave spline formed on the mounting member 45 is splined with a convex spline formed at one end of the second engine output shaft 11b. 2 and 3, the first spline coupling portion between the concave spline of the mounting member 45 and the convex spline of the second engine output shaft 11b is denoted by reference numeral 36a.

  The generator motor 2 and the planetary gear mechanism 20 are arranged in series on the second engine output shaft 11b, and a concave spline is formed at the other end of the second engine output shaft 11b. A concave spline formed at the other end of the second engine output shaft 11b is splined with a convex spline formed on the input shaft 37 of a load member 3 (see FIG. 1) such as a transmission system or a hydraulic pump system. 2 and 3, the second spline connecting portion between the concave spline of the second engine output shaft 11b and the convex spline of the input shaft 37 of the load member 3 is indicated by reference numeral 36b.

The generator motor 2 and the planetary gear mechanism 20 are housed in the motor housing 15, and the motor housing 15, the flywheel 10, the second engine output shaft 11b, the input shaft 37 of the load member 3, etc. are housed in the casing 18. Has been. The motor housing 15 is attached to the casing 18 via bolts, and includes a first motor housing 15a and a second second motor housing 15b that can be divided into two. The second engine output shaft 11b is supported on the inner diameter side of the first motor housing 15a via the first bearing 40a and on the inner diameter side of the second motor housing 15b via the fourth bearing 40d. .
The casing 18 includes a first casing 18a attached to the engine case 1a and a second casing 18b attached to a case (not shown) of the load member 3.

  Both the bottom surface side of the motor housing 15 and the bottom surface side of the casing 18 are configured as oil sumps. The oil sump in the motor housing 15 and the oil sump in the casing 18 communicate with each other via a discharge port 17b formed in the first motor housing 15a.

That is, the oil overflowing from the oil reservoir in the motor housing 15 flows into the oil reservoir of the casing 18 from the discharge port 17b.
Further, the oil reservoir in the casing 18 is connected to the heat exchanger 5 shown in FIG. 1 from a discharge port 19 formed in the first casing 18a.

  An external spline 38 is formed on the outer peripheral surface of the second engine output shaft 11b on the other end side, and the external spline 38 meshes with the internal spline 39 of the carrier 23 in the planetary gear mechanism 20. Yes. A planetary gear 22 is supported on the planetary gear shaft 22a erected on the carrier 23, and the planetary gear 22 is retained from the planetary gear shaft 22a by a retainer 27. The planetary gear 22 meshes with the ring gear 24 fixed to the flange portion 16a of the second motor housing 15b and also meshes with the sun gear 21.

  The sun gear 21 is provided on the sun gear shaft 21a supported by the second bearing 40b and the third bearing 40c. The sun gear shaft 21a is disposed so as to be rotatable relative to the second engine output shaft 11b via the second bearing 40b and the third bearing 40c. The inner peripheral surface of the connecting member 47 having a substantially cylindrical shape is fitted to the outer peripheral surface of the sun gear shaft 21a, and the inner peripheral surface of the rotor core 12 is fitted to the outer peripheral surface of the connecting member 47. ing.

  Holding members 25 and 26 are attached to both end faces of the rotor core 12 via bolts. The presser members 25 and 26 prevent the rotor core 12 formed by laminating thin steel plates from being unraveled apart.

  A plurality of permanent magnets 46 are fitted in the rotor core 12. A known rotation sensor 29 that detects the rotation speed of the rotor core 12 is attached to a portion of the first motor housing 15a that faces the end surface of the rotor core 12.

  The stator 13 fixed to the first motor housing 15a is disposed so as to surround the outer peripheral surface of the rotor core 12, and a predetermined gap is formed between the stator 13 and the outer peripheral surface of the rotor core 12. Yes. A coil 14 is wound around the stator 13 by a known winding method. The planetary gear mechanism 20 is configured to have a smaller diameter than the inner diameter of the coil 14, and is disposed closer to the rotor core 12 than the coil end 14a.

  A central oil passage 30 formed as a through hole extending in the axial direction is formed at the axial center of the second engine output shaft 11b. A first orifice 35a and a second orifice 35b are disposed at both ends of the central oil passage 30, respectively. The pressure of the pressure oil supplied into the central oil passage 30 is held by the first orifice 35a and the second orifice 35b disposed at both ends of the central oil passage 30.

  A first oil passage 17 and an oil supply port 17a formed in the second motor housing 15b are communicated with the end side of the second engine output shaft 11b on the second spline coupling portion 36b side with the input shaft 37. A communication oil passage 32a and a second communication oil passage 32b are formed. Although not shown, the oil supply port 17a is connected to a pipe through which the pressure oil discharged from the circulation pump 6 in FIG. 1 flows.

  The first series oil passage 32a is configured as a plurality of through holes formed around the axis of the second engine output shaft 11b on the end side of the second engine output shaft 11b. A communication hole 33 that penetrates the first series of oil passages 32a and the outer peripheral surface of the second engine output shaft 11b is formed in a portion of each first series of oil passages 32a that faces the oil supply port 17a. An oil seal 43 is provided between the communication hole 33 and the oil supply port 17a.

  The end of each first oil passage 32a on the rotor core 12 side is open. In addition, the end of each first oil passage 32a on the load member 3 side is sealed with a plug 44. A plurality of second communication oil passages 32b communicating with the central oil passage 30 are formed in a radial direction of the second engine output shaft 11b at a portion of each first oil passage 32a facing the opening on the rotor core 12 side. ing.

  The opening of each first oil passage 32a and the opening of each second communication oil passage 32b are communicated by a ring 34. The ring 34 is fitted between the step portion of the second engine output shaft 11b and the inner race of the third bearing 40c.

In the illustrated example, the ring 34 is used to communicate the first series oil passage 32a and the second communication oil path 32b. The second communication oil passage 32b can also be configured obliquely with respect to the axis of the two engine output shaft 11b. At this time, both end portions of the first series oil passage 32a and the opening end portion side of the second communication oil passage 32b can be sealed with the plugs 44, respectively.
With this configuration, the oil supply port 17a and the central oil passage 30 can be communicated with each other through the first series oil passage 32a and the second communication oil passage 32b without using the ring 34.

  A plurality of first radiating oil paths 31a to third radiating oil paths 31c that are communicated with the central oil path 30 and formed in the radial direction are formed at a plurality of portions in the second engine output shaft 11b. Each first radiating oil passage 31a opens in a gap between the second bearing 40b and the sun gear shaft 21a, and a plurality of first oils formed in the sun gear shaft 21a and the connecting member 47 are formed in the gap. One end of the path 41a is open. The other end of each first oil passage 41a is opened in a shape facing the inner diameter surface of the first motor housing 15a.

  Each second radiant oil passage 31b communicates with an annular groove formed along the outer peripheral surface of the second engine output shaft 11b. The annular groove communicates with a plurality of second oil passages 41b formed on the sun gear shaft 21a. Each of the second oil passages 41b communicates with an annular gap 42 formed between the pressing member 26 and the connecting member 47, and the gap 42 is an oil passage groove formed on the inner surface side of the pressing member 26. It communicates with 26a.

  Each third radial oil passage 31c opens in a gap between the third bearing 40c and the sun gear shaft 21a, and a plurality of radial third oil passages formed in the sun gear shaft 21a are formed in the gap. 41c communicates. Each of the third oil passages 41c is open at the tooth bottom surface of the sun gear 21, and can supply oil to the meshing portion between the sun gear 21 and the planetary gear 22.

  When the discharge pressure oil from the circulation pump 6 shown in FIG. 1 is supplied to the oil supply port 17a, the supplied pressure oil passes through the oil seal 43 from the communication hole 33 into the first series oil passage 32a. be introduced. The pressure oil introduced into the first series oil passage 32 a is introduced into the second communication oil passage 32 b through the communicating portion by the ring 34 and supplied into the central oil passage 30.

  The pressure oil supplied into the central oil passage 30 is discharged in a radial direction from each of the first radiating oil passage 31a to the third radiating oil passage 31c by the action of centrifugal force due to the rotation of the second engine output shaft 11b. Further, part of the pressure oil supplied into the central oil passage 30 flows out from the first orifice 35a and the second orifice 35b disposed at both ends of the central oil passage 30, respectively.

  The pressure oil flowing out from the first orifice 35a lubricates the first spline coupling portion 36a between the second engine output shaft 11b and the mounting member 45. The pressure oil flowing out from the second orifice 35b lubricates the second spline coupling portion 36b between the second engine output shaft 11b and the input shaft 37. The oil that has lubricated the second spline coupling portion 36 b flows into the oil reservoir in the casing 18.

  The oil that has lubricated the first spline coupling portion 36a flows out between the inner diameter surface side of the first motor housing 15a and the first bearing 40a. A concave portion is formed on the inner diameter surface side of the first motor housing 15a, and the concave portion is configured as an oil sump 16b for oil flowing out from the first spline coupling portion 36a.

  Further, in order to change the flow direction of the oil flowing out from the first spline coupling portion 36a to the oil sump 16b side, there is an inclined surface on the outer peripheral surface portion of the second engine output shaft 11b in the vicinity of the first spline coupling portion 36a. The step part which consists of is formed. The oil flowing into the oil sump 16b flows between the first bearing 40a and the second bearing 40b after lubricating the first bearing 40a.

  The oil that has flowed into the gap between the first bearing 40a and the second bearing 40b moves in the outer circumferential direction of the rotor core 12 by the action of centrifugal force. At this time, the oil is sprayed to cool the rotor core 12 while flowing along the end face of the rotor core 12. The oil that has cooled the rotor core 12 is sprinkled on the stator 13 and the coil 14 to cool the stator 13 and the coil 14.

  The oil released from each first radiating oil passage 31a by the action of the centrifugal force accompanying the rotation of the second engine output shaft 11b flows into the gap between the second bearing 40b and the sun gear shaft 21a, and a part of The oil lubricates the second bearing 40b and flows into the gap between the first bearing 40a and the second bearing 40b. Part of the oil flows through the gap between the sun gear shaft 21a and the second engine output shaft 11b to the third bearing 40c side.

  Since there is a speed difference between the rotational speed of the sun gear shaft 21a and the rotational speed of the second engine output shaft 11b, oil is smoothly supplied between the sun gear shaft 21a and the second engine output shaft 11b. Therefore, a groove along the axial direction of the second engine output shaft 11b can be formed on the inner peripheral surface side of the sun gear shaft 21a or the outer peripheral surface side of the second engine output shaft 11b.

  In addition, the oil that has flowed into the gap between the first bearing 40a and the second bearing 40b passes through the first oil passage 41a and is sprayed together with the oil flowing from between the first bearing 40a and the second bearing 40b. Thus, the rotor core 12 is cooled while flowing along the end face of the rotor core 12.

  The oil released from each second radiating oil passage 31b by the action of the centrifugal force accompanying the rotation of the second engine output shaft 11b is caused by the sun gear from the annular groove formed along the outer peripheral surface of the second engine output shaft 11b. It passes through a plurality of second oil passages 41b formed in the shaft 21a and flows into an annular gap 42 formed between the pressing member 26 and the connecting member 47. Moreover, it can flow out between the sun gear shaft 21a and the second engine output shaft 11b and also to the second bearing 40b side and the third bearing 40c side.

  The oil flowing into the gap 42 passes through the oil passage groove 26a formed on the inner surface side of the pressing member 26, and cools the end surface of the rotor core 12. The oil that has cooled the end face of the rotor core 12 is sprinkled on the stator 13, the coil end 14a, etc., and cools the stator 13 and the coil 14.

  The oil released from each third radiation oil passage 31c by the action of the centrifugal force accompanying the rotation of the second engine output shaft 11b flows into the gap between the third bearing 40c and the sun gear shaft 21a. Part of the oil that has flowed into the gap between the third bearing 40c and the sun gear shaft 21a becomes the lubricating oil of the third bearing 40c, passes through the third bearing 40c, and passes between the third bearing 40c and the carrier 23. The remaining oil flows in between, and is supplied to the tooth bottom surface of the sun gear 21 through a plurality of radial third oil passages 41c formed in the sun gear shaft 21a.

  The oil supplied to the bottom surface of the sun gear 21 lubricates the meshing portion between the sun gear 21 and the planetary gear 22 and lubricates the meshing portion between the planetary gear 22 and the ring gear 24. Oil that has lubricated the meshing part of the sun gear 21 and the planetary gear 22 and the meshing part of the planetary gear 22 and the ring gear 24 is sprinkled on the end face of the rotor core 12 to cool the rotor core 12, The stator 13 and the coil 14 are cooled by being sprinkled on the coil 14.

  Further, the oil that has lubricated the meshing portion of the sun gear 21 and the planetary gear 22 and the meshing portion of the planetary gear 22 and the ring gear 24 is used for lubrication between the carrier 23 and the planetary gear 22 and the second motor. The fourth bearing 40d can be lubricated by dropping along the inner surface of the housing 15b. Oil that lubricates the third bearing 40c and flows between the third bearing 40c and the carrier 23 acts as lubricating oil for the meshing portion between the carrier 23 and the second engine output shaft 11b. Oil that has lubricated the meshing portion of the carrier 23 and the second engine output shaft 11b can be supplied to the fourth bearing 40d as lubricating oil for the fourth bearing 40d.

  Oil that has been sprinkled on the stator 13 and the coil 14 to cool the stator 13 and the coil 14 must be stored in an oil reservoir in the motor housing 15 by cooling or lubricating each member during the fall. become. A part of the oil stored in the oil reservoir in the motor housing 15 overflows from the discharge port 17b shown in FIG. 1 and is returned to the oil reservoir in the casing 18.

  The oil stored in the oil reservoir in the casing 18 is sucked by the circulation pump 6 shown in FIG. Thereafter, as already described with reference to FIG. 1, the oil sucked by the circulation pump 6 is cooled by the heat exchanger 5 and supplied from the supply port 17 again.

  In the present invention, not only the stator 13 and the coil 14 are forcibly cooled, but also the rotor core 12 is forcibly cooled, so that the cooling effect on the rotor core 12 can be enhanced. Therefore, even if the capacity is increased and the heat generation amount is increased, the cooling can be sufficiently performed.

  In the above description of the embodiment, the configuration of the generator motor in which the rotor core 12 is rotated and the stator 13 is fixed has been described. However, an induction motor, a DC brushless motor, an SR motor (a permanent magnet or winding is provided on the rotor). The invention of the present application can be effectively applied to any type of electric motor such as a non-switched reluctance motor) and also when these electric motors are used as a generator. In the case of an induction motor, the secondary winding as a rotor portion can be actively cooled, and in the case of a DC brushless motor, the magnet can be cooled.

  For this reason, the generator motor in the present invention includes all types of motors such as induction motors, DC brushless motors, SR motors, etc., and cases where these motors are used as generators.

  The present invention can apply the technical idea of the present invention to an apparatus or the like to which the technical idea of the present invention can be applied.

It is a schematic diagram of the whole system. (Example) It is sectional drawing of a generator motor. (Example) FIG. 3 is an enlarged view of the upper part of FIG. 2. (Example) It is sectional drawing of a generator motor. (Conventional example 1) It is a schematic diagram of a hybrid type vehicle. (Conventional example 2)

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Engine, 2 ... Generator motor, 3 ... Load apparatus, 5 ... Heat exchanger, 6 ... Circulation pump, 11 (11a, 11b) ... Engine output shaft, 12. .... Rotor core, 13 ... Stator, 14 ... Coil, 15 ... Motor housing, 16b ... Oil sump, 17a ... Oil supply port, 20 ... Planetary gear mechanism, 21 ... Sun Gear, 22 ... planetary gear, 23 ... carrier, 24 ... ring gear, 25-26 ... pressing member, 26a ... groove for oil passage, 30 ... central oil passage, 34. .... Rings, 47 ... connecting members, 50 ... rotor core, 52 ... coils, 53 ... nozzles, 60 ... engine, 61 ... motor, 62 ... planetary gear mechanism, 64 ... Input shaft, 66 ... Coil, 67 ... Output shaft, 69a, 69b ... oil chamber, 75 ... the sun gear, 76 ... career, 77 ... brake.

Claims (2)

A generator motor mounted on a hybrid work vehicle,
A planetary gear mechanism that is arranged in series with the generator motor on the engine output shaft, and transmits the engine rotation to the rotor core of the generator motor;
The engine output shaft is formed at the center of the engine output shaft and is formed at a central oil passage extending in the axial direction of the engine output shaft, at a plurality of different portions in the axial direction of the engine output shaft, and A radiating oil passage penetrating in a radial direction from a central oil passage, and a communication oil passage for communicating the central oil passage with an oil supply port formed in a motor housing of the generator motor,
Spline teeth are formed on at least one end of the engine output shaft,
On the end side where the spline teeth are formed, an opening of the central oil passage is formed,
An orifice is formed in the opening,
A generator motor, wherein pressure oil is supplied to the oil filler opening. The planetary gear mechanism is configured to have a smaller diameter than the coil inner diameter of the generator motor, and is arranged closer to the rotor core than the coil end of the generator motor,
The planetary gear mechanism includes a sun gear provided on a rotation shaft of the rotor core that is rotatable with respect to the engine output shaft;
A planetary gear supported by a carrier to which rotation from the engine output shaft is transmitted and meshed with the sun gear;
Aforementioned planetary gear meshes, the generator motor according to claim 1, characterized in that it comprises a and a ring gear fixed to the motor housing.

Images