JP2019173772A - Rotary electric machine device and vehicle with the same - Google Patents

Abstract

To achieve size reduction and weight reduction with a simple structure and to exhibit a torque amplifying action.SOLUTION: A rotary electric machine device has: a planetary gear mechanism 18 which comprises a stator 14 wound with a coil 26, a rotor 12 arranged on an inner-diameter side of the stator 14 and comprising a magnet while having an inner space part, and a rotary shaft 16 provided to rotate as turning force of the rotor 12 is transmitted, is built in the inner space part of the rotor 12, and has a sun gear 30, a pinion gear 32, a planetary carrier 36, and a ring gear 34; a first clutch mechanism 20 which is fixed to a casing 24 and can grip the planetary carrier 36; and a second clutch mechanism 22 which is fixed to the rotary shaft 16, and can grip the planetary carrier 36. The rotary electric machine device is so provided that the first clutch mechanism 20 can be connected and disconnected and the second clutch mechanism 22 is connected and disconnected according to requested torque.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a rotating electrical machine apparatus and a vehicle including the same.

  For example, Patent Documents 1 and 2 disclose a rotating electrical machine apparatus that includes a first motor, a second motor, and a speed change mechanism that can switch a reduction ratio.

  In the rotating electrical machine apparatus disclosed in Patent Documents 1 and 2, the torque of the first motor and the torque of the second motor arranged coaxially can be merged to exert a torque amplifying effect in the entire system. .

JP 2017-147848 A Japanese Patent No. 6194969

  By the way, in the rotary electric machine apparatus disclosed by patent document 1, 2, since two motors are arrange | positioned coaxially, it is difficult to achieve size reduction and weight reduction with the whole rotary electric machine apparatus.

  In addition, by using two motors including the first motor and the second motor, the number of parts may increase and the manufacturing cost may increase.

  The present invention has been made in view of the above points, and provides a rotating electrical machine apparatus that can be reduced in size and weight with a simple structure and that can exhibit a torque amplifying function, and a vehicle including the same. For the purpose.

  In order to achieve the above object, the present invention provides a casing, a stator around which a coil is wound, a rotor disposed on an inner diameter side of the stator, having an inner space, and having a magnet, A shaft that is rotatably provided with a rotational force transmitted thereto, and a transmission unit, and the transmission unit is incorporated in the inner space of the rotor and includes a sun gear, a planetary gear, a planetary carrier, and a ring gear. A planetary gear mechanism; a first clutch mechanism fixed to the casing and capable of gripping the planetary carrier; and a second clutch mechanism fixed to the shaft and capable of gripping the planetary carrier. Is provided so as to be switchable between contact and separation of the first clutch mechanism and contact and separation of the second clutch mechanism in accordance with required torque. That.

  According to the present invention, it is possible to obtain a rotating electrical machine apparatus that can be reduced in size and weight by a simple structure and that can exhibit a torque amplification action, and a vehicle including the same.

It is a schematic structure sectional view of the rotary electric machine device concerning the embodiment of the present invention. It is a schematic cross section of the planetary gear mechanism shown in FIG. (A) is a skeleton diagram showing a torque transmission path in the case of high torque, (b) is a characteristic diagram of input / output torque transmitted in the case of (a), and (c) is a case of low torque. Skeleton diagram showing torque transmission path, (d) is a characteristic diagram of input / output torque transmitted in the case of (c). It is a schematic diagram which shows the transmission path | route of a high torque. It is a schematic diagram which shows the transmission path | route of a low torque.

  Next, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. FIG. 1 is a schematic cross-sectional view of a rotating electrical machine apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic cross-sectional view of the planetary gear mechanism shown in FIG.

  The rotating electrical machine apparatus 10 according to the embodiment of the present invention is configured by, for example, a three-phase AC brushless motor. As shown in FIG. 1, the rotating electrical machine apparatus 10 includes a rotor 12, a stator 14, a rotating shaft (shaft) 16, a planetary gear mechanism 18, and a first clutch mechanism 20 (also referred to as “CL1”). The second clutch mechanism 22 (also referred to as “CL2”) and a casing 24 are provided. The planetary gear mechanism 18, the first clutch mechanism 20, and the second clutch mechanism 22 function as a transmission unit.

  The rotor 12 is a rotor that is rotated by the magnetic force generated by the stator 14 and functions as a magnetic circuit component. The rotor 12 includes a cylindrical rotor core and a plurality of magnets (not shown) embedded and fixed in the rotor core. The rotor core is formed by laminating a plurality of thin ring plate-like rotor core plates in the axial direction. The magnet is composed of a permanent magnet, and is arranged at equal intervals in the circumferential direction on the outer peripheral surface side of the rotor core.

  The stator 14 generates a magnetic force for rotating the rotor 12 by being supplied with a three-phase (U-phase, V-phase, W-phase) alternating current from an external inverter (not shown). The stator includes a stator core and a plurality of coils. The stator core is configured by laminating a plurality of thin ring-shaped stator core plates in the axial direction. In addition, a plurality of teeth (not shown) that are spaced apart at equal intervals in the circumferential direction are arranged inside the stator core in the radial direction. A coil 26 is wound around each tooth.

  The rotating shaft 16 is formed of a hollow or hollow shaft, and is disposed so as to be rotatable about a shaft line by a plurality of bearing members 28.

  The planetary gear mechanism 18 is configured as a transmission (gear mechanism) that shifts and outputs the rotational force of the rotor 12. The planetary gear mechanism 18 includes a sun gear 30, a pinion gear (planetary gear) 32, a ring gear 34, and a planetary carrier 36.

  The sun gear 30 is connected to the rotor 12 that is a magnetic circuit component, and receives rotational torque from the rotor 12 and rotates integrally with the rotor 12. The sun gear 30 has a substantially U-shaped radial cross section, and is supported so as to be rotatable independently of the rotary shaft 16 via a pair of bearings 38 spaced apart in the axial direction of the rotary shaft 16. ing.

  The pinion gear 32 includes a pair of first pinion gear 32a and second pinion gear 32b that mesh with each other (see FIG. 2). Both ends of the pair of first and second pinion gears 32a and 32b along the axial direction are rotatably supported by a pair of side wall portions 40 and 40 (see FIG. 1) facing each other of a planetary carrier 36 described later. Yes.

  The ring gear 34 is fitted on the rotary shaft 16 by, for example, spline coupling or the like, and rotates integrally with the rotary shaft 16. The ring gear 34 outputs the rotational torque amplified by the planetary gear mechanism 18 to the rotating shaft 16.

  The ring gear 34 has a gear portion 42 that is bent in a substantially L-shaped cross section and meshes with a gear portion of one of the pair of first and second pinion gears 32a and 32b.

  The planetary carrier 36 includes a pair of side wall portions 40, 40, an extension portion 46 that bends from one of the pair of side wall portions 40, 40 and extends to the first clutch mechanism 20, and an extension A branch portion 48 that is bent from the middle of the portion 46 and extends to the second clutch mechanism 22. A bearing 49 is interposed between the branch portion 48 and the ring gear 34. Moreover, a pair of side wall parts 40 and 40 are pivotally supported by the both ends of a pair of 1st and 2nd pinion gear 32a, 32b so that rotation is possible. Further, the pair of side wall portions 40, 40 are connected to each other by a pair of horizontal portions 50, 50 extending substantially in parallel with the axis (rotation center) of the rotation shaft 16. In FIG. 1, only one horizontal portion 50 is shown, and the other horizontal portion 50 is not shown.

  The first clutch mechanism 20 and the second clutch mechanism 22 have substantially the same configuration, and are configured by a well-known wet multi-plate clutch. The wet multi-plate clutch includes, for example, a piston 52, a clutch plate 53, a mating plate 54, a clutch drum 56, a clutch gear 58, and a return spring 60. In the first clutch mechanism 20, the return spring 60 is configured by a coil spring, whereas in the second clutch mechanism 22, the return spring 60 is configured by a plate spring.

  In the first clutch mechanism 20, the bent outer diameter end portion of the clutch drum 56 is fixed to the inner wall of the casing 24 via a bolt 62. In the second clutch mechanism 22, it is connected and fixed to the rotary shaft 16 via a support portion 35. In the present embodiment, the first clutch mechanism 20 and the second clutch mechanism 22 are each configured by a wet multi-plate clutch, but the present invention is not limited to this. For example, you may make it comprise the 1st clutch mechanism 20 and the 2nd clutch mechanism 22 with the clutch hub sleeve which is a meshing clutch which is not illustrated.

  A first hydraulic oil passage 64 for supplying hydraulic oil to the piston chamber is formed on the inner wall of the casing 24 adjacent to the outer diameter end of the first clutch mechanism 20. Further, a second hydraulic oil passage 66 for supplying hydraulic oil to the piston chamber is formed on the rotary shaft 16 close to the inner diameter end of the second clutch mechanism 22. The “hydraulic oil” is a fluid having both actions of a lubricating oil having a lubricating action and a refrigerant having a cooling action.

  The operations of the first clutch mechanism 20 and the second clutch mechanism 22 are substantially the same. That is, the piston 52 is pressed by the pressure of the hydraulic oil supplied to the piston chamber via the hydraulic oil passage (the first hydraulic oil passage 64 and the second hydraulic oil passage 66). The piston 52 and the plurality of clutch plates 53 are integrally displaced by the pressing force to the piston 52. When the plurality of plate-like clutch plates 53 are displaced integrally with the piston 52, the plurality of plate-like mating plates 54 arranged corresponding to the clutch plates 53 are pressed. As a result, the plurality of clutch plates 53 and the plurality of mating plates 54 come into contact, and power is transmitted from the clutch drum 56 connected to the mating plate 54 to the clutch gear 58 connected to the clutch plate 53.

  A resolver 68 for detecting a rotation angle is disposed on the inner diameter side close to the rotation shaft 16. The resolver 68 includes a resolver stator 68 a fixed to the casing 24, and a resolver rotor 68 b that is press-fitted and fixed to the rotating shaft 16 and rotates integrally with the rotating shaft 16.

  The rotating electrical machine apparatus 10 according to the present embodiment is basically configured as described above. Next, the function and effect will be described.

  3A is a skeleton diagram showing a torque transmission path in the case of high torque, FIG. 3B is a characteristic diagram of input / output torque transmitted in the case of FIG. 3A, and FIG. ) Is a skeleton diagram showing a torque transmission path in the case of low torque, FIG. 3D is a characteristic diagram of input / output torque transmitted in the case of FIG. 3C, and FIG. 4 is a transmission path of high torque. FIG. 5 is a schematic diagram showing a low torque transmission path. In the skeleton diagrams shown in FIGS. 3A and 3C, the pinion gear 32 is depicted as a single gear, but the pair of first and second pinion gears 32a and 32b is shown in FIG. As shown in FIG.

  The rotating electrical machine apparatus 10 switches between contact / separation (on / off) of the first clutch mechanism 20 and contact / separation (on / off) of the second clutch mechanism 22 according to the required rotational torque (drive torque). It is provided as possible. As a result, in this embodiment, the rotational torque (driving torque) can be switched between high torque (torque T1) and low torque (torque T2 + torque T3) (see FIGS. 4 and 5 to be described later). When the rotational torque (drive torque) of the motor is T0, the relationship of T0 <T1, T0 = (T2 + T3) is established among the torques T0, T1, T2, and T3.

  First, the case where a high torque (torque T1) is output will be described. In this case, the first clutch mechanism 20 is energized to an on state (connected state), and the second clutch mechanism 22 is deenergized to an off state (separated state) (CL1; on state, CL2; off). Status).

  As shown in FIGS. 3A and 4, the rotational torque derived from the rotor 12 is introduced into the sun gear 30. The rotational torque introduced into the sun gear 30 is introduced into the pinion gear 32 that is a pair of first and second pinion gears 32a and 32b. That is, one second pinion gear 32b that meshes with the gear portion of the sun gear 30 rotates, and the other first pinion gear 32a that meshes with one second pinion gear 32b rotates. At this time, the planetary carrier 36 connected to the pair of first and second pinion gears 32 a and 32 b is in a connected state in which the extending portion 46 is gripped by the first clutch mechanism 20. For this reason, the planetary carrier 36 is in a rotation stopped state.

  Rotational torque is introduced into the ring gear 34 by the pair of first and second pinion gears 32a and 32b meshing with each other. As a result, the rotational torque (torque T1) output from the ring gear 34 is transmitted to the rotating shaft 16.

  Next, a case where low torque (torque T2 + torque T3) is output will be described. In this case, the first clutch mechanism 20 is deenergized to be in an off state (separated state), and the second clutch mechanism 22 is energized to be in an on state (connected state) (CL1; off state, CL2; on). Status).

  As shown in FIGS. 3C and 5, the rotational torque derived from the rotor 12 is introduced into the sun gear 30. The rotational torque introduced into the sun gear 30 is introduced into the planetary carrier 36 via the pinion gear 32 which is a pair of first and second pinion gears 32a and 32b. At that time, the planetary carrier 36 connected to the pair of first and second pinion gears 32 a and 32 b is in a free state (non-connected state) in which the extension 46 is not gripped by the first clutch mechanism 20. Further, since the second clutch mechanism 22 is in the on state, the sun gear 30, the first and second pinion gears 32a and 32b, the ring gear 34, and the planetary carrier 36 rotate integrally.

  Therefore, the rotational torque derived from the sun gear 30 is introduced into the ring gear 34 through the pair of first and second pinion gears 32a and 32b. At the same time, the rotational torque derived from the sun gear 30 is derived to the planetary carrier 36, and the torque T <b> 3 is introduced to the ring gear 34 via the planetary carrier 36.

  As a result, the ring gear 34 has a low torque (torque T2) combined with the rotational torque (torque T2) derived from the first and second pinion gears 32a and 32b and the rotational torque (torque T3) derived from the planetary carrier 36. T2 + torque T3) is introduced. The low torque (torque T2 + torque T3) introduced into the ring gear 34 is transmitted to the rotating shaft 16. Thus, in this embodiment, for example, in the case of low-speed rotation and high torque (torque T1) (see the thick solid line in FIG. 3B) and in the case of high-speed rotation and low torque (torque T2 + torque T3) (see FIG. 3 (d) (see the thick broken line) can be easily switched by the contact and separation (on / off) of the first clutch mechanism 20 and the second clutch mechanism 22. Note that the torque T1 and the torque T2 have a relationship of T1 ≠ T2.

  In the present embodiment, a single motor is arranged, and a pair of first and second pinion gears 32a and 32b are incorporated into the planetary carrier 36 of the planetary gear mechanism 18, and the first clutch mechanism 20 and the second clutch mechanism are additionally provided. Thus, the rotating electrical machine apparatus 10 is configured. In the present embodiment, by configuring the rotating electrical machine apparatus 10 with such a simple structure, the rotating electrical machine apparatus 10 is reduced in size and weight, and the torque amplifying action (FIGS. 3A and 3B) is achieved. 4) can be exhibited.

  In other words, the rotational torque (driving torque) can be amplified while the overall shape and size of the transmission remain unchanged. Therefore, in this embodiment, the rotary electric machine apparatus 10 can be mounted as it is on a conventional vehicle.

  In the present embodiment, the planetary gear mechanism 18, the first clutch mechanism 20, and the second clutch mechanism 22 are arranged in a region excluding the rotor 12, which is a magnetic circuit component. Thereby, the space part in the casing 24 can be used effectively, and it can contribute to size reduction and weight reduction of the rotary electric machine apparatus 10.

  By mounting such a rotating electrical machine device 10 on a vehicle (not shown), it is possible to achieve a vehicle that can achieve a reduction in size and weight with a simple structure and can exhibit a torque amplifying action. .

10 Rotating electrical machine device 12 Rotor (magnetic circuit component)
14 Stator 16 Rotating shaft (shaft)
18 Planetary gear mechanism (transmission unit)
20 First clutch mechanism (transmission unit)
22 Second clutch mechanism (transmission unit)
24 casing 30 sun gear 32 planetary gear 32a, 32b pinion gear 34 ring gear 36 planetary carrier

Claims (4)

A casing,
A stator around which a coil is wound;
A rotor that is disposed on the inner diameter side of the stator, has an inner space, and includes a magnet;
A shaft provided rotatably so that the rotational force of the rotor is transmitted;
A transmission unit;
With
The transmission unit is
A planetary gear mechanism built in the inner space of the rotor, having a sun gear, a planetary gear, a planetary carrier, and a ring gear;
A first clutch mechanism fixed to the casing and capable of gripping the planetary carrier;
A second clutch mechanism fixed to the shaft and capable of gripping the planetary carrier;
Have
The rotating electrical machine apparatus is characterized in that the transmission unit is provided so as to be able to switch between contact and separation of the first clutch mechanism and contact and separation of the second clutch mechanism in accordance with required torque. The rotating electrical machine apparatus according to claim 1,
The planetary gear comprises a pair of pinion gears rotatably supported by the planetary carrier and meshing with each other,
One of the pair of pinion gears is arranged such that one of the pinion gears meshes with the sun gear, and the other pinion gear meshes with the ring gear. In the rotating electrical machine apparatus according to claim 1 or 2,
The rotating electrical machine apparatus, wherein the planetary gear mechanism, the first clutch mechanism, and the second clutch mechanism are arranged in a region excluding a magnetic circuit component.   A vehicle comprising the rotating electrical machine apparatus according to any one of claims 1 to 3.

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