JP2018054099A - Power device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power device capable of restricting a vehicle by operation of one rotation restraining mechanism commonly used in a left wheel and a right wheel in stopping the vehicle, while keeping a constitution to independently control power of the left wheel and the right wheel in running of the vehicle by independently controlling power of a left motor and a right motor.SOLUTION: A power device 1 includes a left motor LMOT for driving a left wheel LW of a vehicle, a right motor RMOT for driving a right wheel RW of the vehicle, a left transmission mechanism LT disposed on a left power transmission path of the left motor LMOT and the left wheel LW, and a right transmission mechanism RT disposed on a right power transmission path of the right motor RMOT and the right wheel RW. In a planetary gear mechanism 20, a sun gear 21 is mechanically connected to a left axle 12L, a ring gear 22 is mechanically connected to a right axle 12R, and a planetary carrier 24 is mechanically connected to a parking mechanism 30.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a power unit mounted on a vehicle.

  Conventionally, a left electric motor that drives the left wheel of the vehicle and a right electric motor that drives the right wheel of the vehicle, a power transmission path between the left motor and the left wheel, and a right power transmission path between the right motor and the right wheel, However, a mechanically independent power unit is known (for example, Patent Document 1).

  In the parking mechanism of such a power unit, a parking gear is arranged in each power transmission path, and when the select lever is selected to the parking range, the parking pole is engaged with the tooth gap of the parking gear. The vehicle can be maintained in a stopped state.

  In the power plant described in Patent Document 2, the torques of the two motors input to the differential case of the differential device are transmitted to the left and right wheels via the first and second drive shafts and the transmission shaft to cause the vehicle to travel. The parking gear is provided in the differential case.

JP 2014-015978 A Japanese Patent Laid-Open No. 05-278483

  However, in the power unit described in Patent Document 1, when the rotation restriction mechanism is operated, when the parking gears are out of phase, the parking poles do not simultaneously engage with the parking gears. May rotate and the vehicle may stop diagonally.

  In the power unit described in Patent Document 2, only one parking mechanism is required for two motors. However, since the torques of the two motors are input to the differential case, There is room for improvement in that only the same torque equally distributed by the differential device can be transmitted at all times, and the torque difference between the left and right wheels cannot be freely controlled.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to separately control the power of the left wheel and the right wheel when the vehicle is traveling by controlling the power of the left motor and the right motor separately and independently. An object of the present invention is to provide a power device capable of restraining a vehicle by operating one rotation restriction mechanism common to the left wheel and the right wheel when the vehicle is stopped, while having a configuration that can be controlled independently.

In order to achieve the above object, the invention described in claim 1
A left electric motor (for example, a left electric motor LMOT in an embodiment described later) for driving a left wheel of the vehicle (for example, a left wheel LW in an embodiment described later);
A right motor (for example, a right motor RMOT in an embodiment described later) for driving a right wheel of the vehicle (for example, a right wheel RW in an embodiment described later);
A left rotating body disposed on a left power transmission path between the left motor and the left wheel (for example, a left axle 12L, a left final gear 17L, a left output gear 13L, and a second left intermediate gear 16L in an embodiment described later). When,
A right rotating body (for example, a right axle 12R, a right final gear 17R, a right output gear 13R, and a second right intermediate gear 16R in an embodiment described later) disposed on a right power transmission path between the right motor and the right wheel. A power device (for example, a power device 1 according to an embodiment described later),
The power unit includes a sun rotator (for example, a sun gear 21 in an embodiment described later), a ring rotator (for example, a ring gear 22 in an embodiment described later), and the sun rotator and the ring rotator. A planetary rotating body (for example, a planetary gear 23 in an embodiment described later) disposed so as to be able to transmit power, and a carrier rotating body (for example, a planetary carrier 24 in an embodiment described later) that supports the planetary rotating body so as to rotate and revolve. And the rotational speeds of the three rotating elements comprising the sun rotator, the ring rotator, and the carrier rotator satisfy the collinear relationship arranged on a single straight line in the collinear diagram. A planetary mechanism (for example, a planetary gear mechanism 20 of an embodiment described later),
A rotation restricting mechanism that can be switched to an operating state or a non-operating state, restricts the rotation of the rotating element in the operating state, and allows the rotating element to rotate in the non-operating state (for example, parking in the embodiments described later) A mechanism 30),
Among the three rotating elements, from the left end side in the arrangement order in the collinear diagram, a first rotating element (for example, a sun gear 21 in an embodiment described later) and a second rotating element (for example, a planetary carrier 24 in an embodiment described later). ), When the third rotating element (for example, ring gear 22 of the embodiment described later),
The first rotating element is mechanically connected to either the left rotating body or the right rotating body (for example, the left final gear 17L of the embodiment described later);
The third rotating element is mechanically connected to either the left rotating body or the right rotating body (for example, the right final gear 17R in the embodiment described later);
The second rotation element is mechanically connected to the rotation restricting mechanism.

The invention described in claim 2
The power plant according to claim 1,
The left electric motor drives a left wheel which is a steered wheel,
The right motor drives a right wheel that is a steered wheel.

The invention according to claim 3
The power plant according to claim 1,
The left electric motor drives a left wheel that is a non-steered wheel,
The right motor drives a right wheel that is a non-steered wheel.

The invention according to claim 4
It is a power unit given in any 1 paragraph of Claims 1-3,
The planetary mechanism is a planetary gear mechanism (for example, a planetary gear mechanism 20 of an embodiment described later),
The sun rotating body is a sun gear (for example, a sun gear 21 in an embodiment described later),
The ring rotating body is a ring gear (for example, a ring gear 22 in an embodiment described later),
The planetary rotator is a planetary gear (for example, a planetary gear 23 in an embodiment described later),
The carrier rotating body is a planetary carrier (for example, a planetary carrier 24 in an embodiment described later).

The invention described in claim 5
The power plant according to claim 4, wherein
The planetary gear is a single pinion.

The invention described in claim 6
The power plant according to claim 4, wherein
The planetary gear is a double pinion.

The invention described in claim 7
The power plant according to any one of claims 1 to 6,
The left output shaft of the left motor and the left axle of the left wheel are arranged in parallel,
The right output shaft of the right motor and the right axle of the right wheel are arranged in parallel.

The invention according to claim 8 provides:
The power plant according to claim 7, wherein
The left output shaft and the right output shaft are arranged on a first virtual straight line (for example, a first virtual straight line L1 in an embodiment described later),
The left axle and the right axle are arranged on a second virtual straight line (for example, a second virtual straight line L2 in an embodiment described later),
The left electric motor and the right electric motor are arranged at positions that are mirror-symmetric with respect to the planetary mechanism.

  According to the first aspect of the present invention, the first rotating element of the planetary mechanism is mechanically connected to one of the left rotating body and the right rotating body, and the third rotating element is connected to the left rotating body and the right rotating body. Since the second rotation element is mechanically connected to one of the other, and the second rotation element is mechanically connected to the rotation restricting mechanism, the planetary mechanism does not rotate relative to the rotation restricting mechanism and the vehicle stops moving diagonally. Can be prevented. That is, by controlling the power of the left motor and the right motor separately and independently, the power of the left wheel and the right wheel can be controlled independently when the vehicle is traveling, The vehicle can be reliably restrained by the operation of one rotation restricting mechanism common to the right wheel.

  According to invention of Claim 2, rotation of a steered wheel can be controlled at the time of the action | operation of a rotation control mechanism.

  According to invention of Claim 3, rotation of a non-steered wheel can be controlled at the time of the action | operation of a rotation control mechanism.

  According to the invention of claim 4, the manufacturing cost can be reduced by utilizing the planetary gear mechanism having high versatility.

  According to the fifth and sixth aspects of the invention, the relative rotation of the planetary mechanism can be restricted regardless of whether the planetary gear is a single pinion or a double pinion.

  According to the invention of claim 7, since the left output shaft of the left motor and the left axle of the left wheel are arranged in parallel, the left power transmission path can be configured by simple gear engagement, and the right output shaft of the right motor. Since the right wheel and the right axle of the right wheel are arranged in parallel, the right power transmission path can be configured with simple gear engagement.

  According to the invention of claim 8, the left output shaft and the right output shaft are arranged on the first virtual straight line, the left axle and the right axle are arranged on the second virtual straight line, and the left motor and the right motor are further arranged. Are arranged at positions that are mirror-symmetric with respect to the planetary mechanism, so that the power unit can be made compact.

It is a skeleton figure of the power plant concerning a 1st embodiment of the present invention. It is a schematic perspective view of the power plant of FIG. FIG. 2 is a collinear chart of the planetary gear mechanism of FIG. 1 when the parking mechanism is activated. It is a skeleton figure of the power plant concerning a 2nd embodiment of the present invention. FIG. 5 is a collinear chart of the planetary gear mechanism of FIG. 4 when the parking mechanism is activated.

  Hereinafter, embodiments of a power plant according to the present invention will be described in detail with reference to the drawings. The drawings are viewed in the direction of the reference numerals.

<First Embodiment>
As shown in FIGS. 1 and 2, the power plant 1 of the first embodiment includes a left electric motor LMOT that drives a left wheel LW of a vehicle, a right electric motor RMOT that drives a right wheel RW of the vehicle, and a left electric motor LMOT. A left speed change mechanism LT disposed on the left power transmission path with the left wheel LW, and a right speed change mechanism RT disposed on the right power transmission path with the right motor RMOT and the right wheel RW.

  The left output shaft 11L of the left motor LMOT and the right output shaft 11R of the right motor RMOT are arranged on the first virtual straight line L1, and the left axle 12L of the left wheel LW and the right axle 12R of the right wheel RW are the first virtual straight line L1. It arrange | positions on the parallel 2nd virtual straight line L2.

  The left transmission mechanism LT and the right transmission mechanism RT are arranged between the left electric motor LMOT and the right electric motor RMOT. The left motor LMOT and the right motor RMOT are arranged symmetrically with respect to a virtual intermediate plane M that is orthogonal to the first virtual line L1 and the second virtual line L2 and is equidistant from the left motor LMOT and the right motor RMOT. In addition, the left transmission mechanism LT and the right transmission mechanism RT are also arranged symmetrically with respect to the virtual intermediate plane M.

  The left speed change mechanism LT includes a left output gear 13L provided on the left output shaft 11L of the left electric motor LMOT, a first left intermediate gear 14L having a large diameter that meshes with the left output gear 13L, and a left connection with the first left intermediate gear 14L. A small-diameter second left intermediate gear 16L connected by a shaft 15L and rotating integrally with the first left intermediate gear 14L; a left final gear 17L provided to rotate integrally with the left axle 12L and meshing with the second left intermediate gear 16L; Is provided.

  Therefore, the left power transmission path between the left motor LMOT and the left wheel LW is the left output shaft 11L, the left output gear 13L, the first left intermediate gear 14L, the left connecting shaft 15L, the second left intermediate gear 16L of the left motor LMOT, The left final gear 17L and the left axle 12L are configured.

  The right speed change mechanism RT includes a right output gear 13R provided on the right output shaft 11R of the right motor RMOT, a large-diameter first right intermediate gear 14R meshing with the right output gear 13R, and a first right intermediate gear 14R and a right connection. A small-diameter second right intermediate gear 16R that is connected by a shaft 15R and rotates integrally with the first right intermediate gear 14R; a right final gear 17R that is provided so as to rotate integrally with the right axle 12R and meshes with the second right intermediate gear 16R; Is provided.

  Therefore, the right power transmission path between the right motor RMOT and the right wheel RW is the right output shaft 11R, the right output gear 13R, the first right intermediate gear 14R, the right connecting shaft 15R, the second right intermediate gear 16R of the right motor RMOT, It is comprised by the right last gear 17R and the right axle 12R.

  A single pinion type planetary gear mechanism 20 is provided between the left final gear 17L of the left transmission mechanism LT and the right final gear 17R of the right transmission mechanism RT. The planetary gear mechanism 20 includes a sun gear 21, a ring gear 22, a plurality of planetary gears 23 that mesh with the sun gear 21 and the ring gear 22, and a planetary carrier 24 that supports the planetary gear 23 so as to rotate and revolve. In addition, the three rotational elements including the planetary carrier 24 satisfy a collinear relationship in which their rotational speeds are always arranged on a single straight line in a speed collinear diagram (also referred to as a collinear diagram).

  In the planetary gear mechanism 20, the sun gear 21 is connected to the left final gear 17L so as to be integrally rotatable, the ring gear 22 is connected to be able to rotate integrally with the right final gear 17R, and the planetary carrier 24 is connected to the parking mechanism 30. Accordingly, the sun gear 21 is connected to the left axle 12L together with the left final gear 17L so as to be integrally rotatable, and the ring gear 22 is connected to the right axle 12R together with the right final gear 17R. The parking mechanism 30 includes a parking gear 32 formed on the outer peripheral surface of the planetary carrier 24, and a parking pole 31 that is detachably disposed on the parking gear 32.

  The parking mechanism 30 can be switched between an operation state and a non-operation state. When the parking mechanism 31 is in the operation state (also referred to as operation), the parking pole 31 engages with the planetary carrier 24 to restrict the rotation of the planetary carrier 24. When in the operating state, the parking pole 31 is separated from the planetary carrier 24 to allow the planetary carrier 24 to rotate.

  As described above, the planetary gear mechanism 20 satisfies the collinear relationship in which the rotational speeds of the three rotating elements including the sun gear 21, the ring gear 22, and the planetary carrier 24 are always aligned on a single straight line in the collinear diagram. In the single pinion type planetary gear mechanism 20, the arrangement order in the collinear diagram is the sun gear 21, the planetary carrier 24, and the ring gear 22 from the left end side or the right end side. In FIG. 3, the arrangement order in the alignment chart is the sun gear 21, the planetary carrier 24, and the ring gear 22 from the left end side. The collinear diagram is a diagram showing the relationship between the rotational speeds of the rotating elements in the planetary gear mechanism 20. In the collinear chart, the distance from the horizontal line indicating the value 0 to the black circle on the vertical line is the rotation of each rotating element. Represents a number.

  In FIG. 3, the sun gear 21 is represented as “S”, the planetary carrier 24 is represented as “C”, and the ring gear 22 is represented as “R”, and members that are mechanically connected to the rotating elements are shown in parentheses for easy understanding. It is described. That is, since the sun gear 21 (S) is mechanically connected to the left wheel LW via the left axle 12L, the planetary carrier 24 (C) is mechanically connected to the parking mechanism 30 and thus the parking mechanism. The ring gear 22 (R) is described as the right wheel because it is mechanically connected to the right wheel RW via the right axle 12R.

  When the vehicle is stopped and the parking mechanism 30 is in an operating state, the parking pole 31 engages with the parking gear 32 and restricts the rotation of the planetary carrier 24, so that the planetary carrier 24 becomes a fixed point (the rotation speed is zero). . In this state, the sun gear 21 and the ring gear 22 can always rotate only at a constant rotation speed ratio, that is, the rotation speed of the sun gear 21 (S) with the planetary carrier 24 (C) as a fixed point on the alignment chart. And the rotational speed of the ring gear 22 (R) are always aligned on a single straight line. When the planetary carrier 24 (C) is a fixed point, the rotational direction of the sun gear 21 (S) and the rotational direction of the ring gear 22 (R) are always opposite.

  As described above, the sun gear 21 (S) is connected to the left axle 12L (ie, the left wheel LW) so as to be integrally rotatable, and the ring gear 22 (R) is integrally rotatable to the right axle 12R (ie, the right wheel RW). Since the sun gear 21 rotates in one direction and the ring gear 22 rotates in the opposite direction, the left wheel LW connected to the sun gear 21 rotates in one direction (for example, the forward direction). This is a case where the right wheel RW connected to the ring gear 22 rotates in the reverse direction (for example, the reverse direction), but cannot occur in a vehicle (for example, a normal passenger car) other than a tracked vehicle. While the passenger car is turning, there is a difference in rotational speed between the left wheel LW and the right wheel RW, but the rotational direction is always the same.

  Thus, in the single pinion type planetary gear mechanism 20, the sun gear 21 is mechanically connected to the left axle 12L, the ring gear 22 is mechanically connected to the right axle 12R, and the planetary carrier 24 is mechanically connected to the parking mechanism 30. Therefore, when the vehicle is stopped and the parking mechanism 30 is in operation, relative rotation is generated in each rotation element of the planetary gear mechanism 20 as long as no slip occurs between the left wheel LW and the right wheel RW and the road surface. It is possible to prevent the vehicle from moving and stopping diagonally. That is, the power unit 1 has a configuration in which the power of the left wheel LW and the right wheel RW can be controlled independently while the vehicle is running by separately controlling the power of the left motor LMOT and the right motor RMOT. However, when the vehicle is stopped, the vehicle can be reliably restrained by the operation of one common parking mechanism 30 for the left wheel LW and the right wheel RW.

  Note that the left power transmission path between the left motor LMOT and the left wheel LW and the right power transmission path between the right motor RMOT and the right wheel RW are configured separately and when the parking mechanism 30 is in an inoperative state, It rotates independently from the ring gear 22, and no power is transmitted between them.

  Further, the power unit 1 provided with the planetary gear mechanism 20 can be applied to a power unit for driving a steered wheel (for example, for driving front wheels), and also applied to a power unit for driving a non-steered wheel (for example, for driving rear wheels). it can.

  In the above embodiment, the sun gear 21 is mechanically connected to the left axle 12L, the ring gear 22 is mechanically connected to the right axle 12R, and the planetary carrier 24 is mechanically connected to the parking mechanism 30. The sun gear 21 may be mechanically connected to the right axle 12R, the ring gear 22 may be mechanically connected to the left axle 12L, and the planetary carrier 24 may be mechanically connected to the parking mechanism 30.

Second Embodiment
Next, the power plant 1 according to the second embodiment will be described with reference to FIGS. 4 and 5.
The power unit 1 according to the second embodiment is the same as the power unit 1 according to the first embodiment except that the planetary gear mechanism 20 is a double-punion type planetary gear mechanism. The description is omitted, and different parts will be described in detail.

  The double pinion type planetary gear mechanism 20 includes a sun gear 21, a ring gear 22, a plurality of first planetary gears 23a meshing with the sun gear 21, a plurality of second planetary gears 23b meshing with the first planetary gear 23a and the ring gear 22, and a first planetary gear 23a. And the planetary carrier 24 that supports the second planetary gear 23b so as to be capable of rotating and revolving. The three rotating elements including the sun gear 21, the ring gear 22, and the planetary carrier 24 have their rotational speeds constantly in the collinear chart. Satisfy the collinear relationship on a single straight line.

  In the planetary gear mechanism 20, the sun gear 21 is coupled to the left final gear 17 </ b> L so as to be integrally rotatable, the planetary carrier 24 is coupled to be integrally rotatable to the right final gear 17 </ b> R, and the ring gear 22 is connected to the parking mechanism 30. Therefore, the sun gear 21 is coupled to the left axle 12L together with the left final gear 17L so as to be integrally rotatable, and the planetary carrier 24 is coupled to the right axle 12RL together with the right final gear 17R. The parking mechanism 30 includes a parking gear 32 formed on the outer peripheral surface of the ring gear 22, and a parking pole 31 that is detachably disposed on the parking gear 32.

  The parking mechanism 30 can be switched between an operating state and a non-operating state. When the parking mechanism 30 is in the operating state, the parking pawl 31 engages with the parking gear 32 to restrict the rotation of the ring gear 22. 31 is separated from the parking gear 32 to allow the ring gear 22 to rotate.

  As described above, the planetary gear mechanism 20 satisfies the collinear relationship in which the rotational speeds of the three rotating elements including the sun gear 21, the ring gear 22, and the planetary carrier 24 are always aligned on a single straight line in the collinear diagram. In the double pinion type planetary gear mechanism 20, the arrangement order in the alignment chart is the sun gear 21, the ring gear 22, and the planetary carrier 24 from the left end side or the right end side. In FIG. 5, the arrangement order in the nomograph is the sun gear 21, the ring gear 22, and the planetary carrier 24 from the left end side.

  In FIG. 5, the sun gear 21 is represented as “S”, the ring gear 22 is represented as “R”, and the planetary carrier 24 is represented as “C”, and members that are mechanically connected to each rotating element are shown in parentheses for easy understanding. It is described. That is, the sun gear 21 (S) is mechanically connected to the left wheel LW via the left axle 12L, and the ring gear 22 (R) is mechanically connected to the parking mechanism 30. The planetary carrier 24 (C) is described as a right wheel because it is mechanically connected to the right wheel RW via the right axle 12R.

  When the vehicle is stopped and the parking mechanism 30 is in an operating state, the parking pawl 31 engages with the parking gear 32 and restricts the rotation of the ring gear 22, so that the ring gear 22 becomes a fixed point (rotation speed is zero). In this state, the sun gear 21 and the planetary carrier 24 can always rotate only at a constant rotation speed ratio, that is, the rotation speed of the sun gear 21 (S) with the ring gear 22 (R) as a fixed point on the alignment chart. And the rotational speed of the planetary carrier 24 (C) are always aligned on a single straight line. Further, when the ring gear 22 (R) is a fixed point, the rotational direction of the sun gear 21 (S) and the rotational direction of the planetary carrier 24 (C) are always opposite to each other.

  As described above, the sun gear 21 (S) is coupled to the left axle 12L (ie, the left wheel LW) so as to be integrally rotatable, and the planetary carrier 24 (C) is integrally rotatable with the right axle 12R (ie, right wheel RW). The sun gear 21 rotates in one direction and the planetary carrier 24 rotates in the reverse direction because the left wheel LW connected to the sun gear 21 in the vehicle is in one direction (for example, forward direction). This is a case where the right wheel RW that rotates and is connected to the planetary carrier 24 rotates in the reverse direction (for example, the reverse direction), but cannot occur in a vehicle other than a tracked vehicle (for example, a normal passenger car). .

  As described above, in the double pinion type planetary gear mechanism 20, the sun gear 21 is mechanically connected to the left axle 12L, the planetary carrier 24 is mechanically connected to the right axle 12R, and the ring gear 22 is mechanically connected to the parking mechanism 30. Therefore, when the vehicle is stopped and the parking mechanism 30 is in operation, relative rotation is generated in each rotation element of the planetary gear mechanism 20 as long as no slip occurs between the left wheel LW and the right wheel RW and the road surface. It is possible to prevent the vehicle from moving and stopping diagonally. That is, the power unit 1 has a configuration in which the power of the left wheel LW and the right wheel RW can be controlled independently while the vehicle is running by separately controlling the power of the left motor LMOT and the right motor RMOT. However, when the vehicle is stopped, the vehicle can be reliably restrained by the operation of one common parking mechanism 30 for the left wheel LW and the right wheel RW.

  Note that the left power transmission path between the left motor LMOT and the left wheel LW and the right power transmission path between the right motor RMOT and the right wheel RW are configured separately and when the parking mechanism 30 is in an inoperative state, It rotates independently of the planetary carrier 24, and no power is transmitted between them.

  In the above embodiment, the sun gear 21 is mechanically connected to the left axle 12L, the ring gear 22 is mechanically connected to the parking mechanism 30, and the planetary carrier 24 is mechanically connected to the right axle 12R. The sun gear 21 may be mechanically connected to the right axle 12R, the ring gear 22 may be mechanically connected to the parking mechanism 30, and the planetary carrier 24 may be mechanically connected to the left axle 12L.

In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably.
For example, in the first embodiment, the planetary gear mechanism 20 is disposed between the left final gear 17L and the right final gear 17R, the sun gear 21 is coupled to the left final gear 17L so as to be integrally rotatable, and the ring gear 22 is connected to the right final gear. Although the planetary gear mechanism 20 is disposed between the second left intermediate gear 16L and the second right intermediate gear 16R, the sun gear 21 is connected to the second left intermediate gear 16L so as to be integrally rotatable. The ring gear 22 may be connected to the second right intermediate gear 16R so as to be integrally rotatable, the planetary gear mechanism 20 is disposed between the left output gear 13L and the right output gear 13R, and the sun gear 21 is integrated with the left output gear 13L. The ring gear 22 may be connected to the right output gear 13R so as to be rotatable together.

  By connecting the planetary gear mechanism 20 to the left final gear 17L and the right final gear 17R so as to be integrally rotatable, the parking mechanism 30 is installed at a position closer to the wheel, so that the wheel, that is, the vehicle, is stopped so as not to cause unnecessary movement. The state can be maintained. On the other hand, since the parking mechanism 30 is arranged upstream of the left transmission mechanism LT and the right transmission mechanism RT with respect to the wheels by coupling the left output gear 13L and the right output gear 13R so as to be integrally rotatable, the parking mechanism Since the force required for maintaining the wheels, that is, the vehicle in the stopped state, is small, the parking mechanism 30 can be further downsized. When the planetary gear mechanism 20 is connected to the second left intermediate gear 16L and the second right intermediate gear 16R so as to be integrally rotatable, both merits can be enjoyed. The arrangement of the planetary gear mechanism 20 and the connection relationship between the rotating elements can also be applied to the second embodiment.

  Further, in the left transmission mechanism LT, the first left intermediate gear 14L, the left connecting shaft 15L, and the second left intermediate gear 16L are omitted so that the left output gear 13L and the left final gear 17L are engaged with each other, and the right transmission is performed. In the mechanism RT, the first right intermediate gear 14R, the right connecting shaft 15R, and the second right intermediate gear 16R may be omitted, and the right output gear 13R and the right final gear 17R may be engaged with each other.

In the above embodiment, the planetary gear mechanism 20 is exemplified as the planetary mechanism. However, a planetary roller mechanism that uses the shear resistance of a high-viscosity oil film formed by the rolling motion of the roller instead of the meshing of the gear may be used.
The steered wheel may be a wheel that is a target of toe angle control in addition to normal steer control.

1 Power unit 17L Left final gear (left rotating body)
17R Right final gear (right rotating body)
20 Planetary gear mechanism (planetary mechanism)
21 Sun gear (sun rotating body)
22 Ring gear (ring rotating body)
23 Planetary gear (planetary rotating body)
24 Planetary carrier (carrier rotating body)
30 Parking mechanism (rotation restriction mechanism)
LW Left wheel LMOT Left motor RW Right wheel RMOT Right motor

Claims (8)

A left motor that drives the left wheel of the vehicle;
A right motor that drives the right wheel of the vehicle;
A left rotating body disposed on a left power transmission path between the left electric motor and the left wheel;
A right rotating body arranged on a right power transmission path between the right motor and the right wheel, and a power device comprising:
The power device includes a sun rotator, a ring rotator, a planetary rotator arranged to transmit power between the sun rotator and the ring rotator, and the planetary rotator can rotate and revolve. A carrier rotator to support, and a collinear relationship in which the rotational speeds of three rotating elements including the sun rotator, the ring rotator, and the carrier rotator are aligned on a single straight line in a collinear diagram. A planetary mechanism configured to satisfy,
A rotation restricting mechanism that is switchable between an operating state and a non-operating state, restricts the rotation of the rotating element when in the operating state, and allows the rotation of the rotating element when in the non-operating state;
Among the three rotation elements, when the first rotation element, the second rotation element, and the third rotation element from the left end side in the arrangement order in the collinear diagram,
The first rotating element is mechanically connected to either the left rotating body or the right rotating body;
The third rotating element is mechanically connected to either the left rotating body or the right rotating body;
The power unit, wherein the second rotation element is mechanically connected to the rotation restricting mechanism. The power plant according to claim 1,
The left electric motor drives a left wheel which is a steered wheel,
The right motor is a power unit that drives a right wheel that is a steered wheel. The power plant according to claim 1,
The left electric motor drives a left wheel that is a non-steered wheel,
The right electric motor is a power unit that drives a right wheel that is a non-steered wheel. It is a power unit given in any 1 paragraph of Claims 1-3,
The planetary mechanism is a planetary gear mechanism,
The sun rotor is a sun gear,
The ring rotating body is a ring gear;
The planetary rotating body is a planetary gear,
The carrier rotating body is a power unit, which is a planetary carrier. The power plant according to claim 4, wherein
The planetary gear is a power unit, which is a single pinion. The power plant according to claim 4, wherein
The planetary gear is a power device that is a double pinion. The power plant according to any one of claims 1 to 6,
The left output shaft of the left motor and the left axle of the left wheel are arranged in parallel,
A power unit in which a right output shaft of the right motor and a right axle of the right wheel are arranged in parallel. The power plant according to claim 7, wherein
The left output shaft and the right output shaft are arranged on a first virtual straight line;
The left axle and the right axle are arranged on a second virtual straight line;
The power unit, wherein the left electric motor and the right electric motor are arranged at positions that are mirror-symmetric with respect to the planetary mechanism.

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