JP5354249B2 - Vehicle drive actuator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an actuator with a simple constitution for driving a vehicle can adjust the vehicle height by using the power of an electric motor for driving wheels. <P>SOLUTION: The actuator A1 for driving the vehicle includes a motor generator 10 as an electric motor, and a wheel driving unit 30 for rotation-driving the wheels by transmitting the rotation of the motor generator 10 to an axle. The vehicle driving unit 30 includes a planetary gear deceleration mechanism 32 as a power distributing mechanism for distributing the power from the motor generator 10 into a plurality of powers. A lower seating face 3b of a spring 3 for suspension provided between a vehicle body 1 and the wheel driving unit 30 is vertically movable by the distributed powers via the planetary gear deceleration mechanism 32. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention relates to a vehicle drive actuator that rotationally drives wheels by an electric motor.

Conventionally, the wheel drive and stroke control in the double wishbone suspension can be realized by a single wheel-in motor structure, and the ratio of the drive component of the motor output and the suspension stroke control component can be arbitrarily set according to the vehicle running state. There has been proposed a vehicle drive actuator that can be changed (see, for example, Patent Document 1).
JP 2007-145071 A

  However, in the prior art described in Patent Document 1 described above, it is necessary to provide two wheel drive motors that can be controlled independently for each drive wheel, which increases the weight or complicates the control. There is a problem that. In addition, since the suspension device stroke is adjusted by moving the lower arm up and down, a large space is required in the axial direction, and the actuator shaft and the mounting position of the lower arm are separated, resulting in large torque. There is also a problem that it becomes necessary.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a vehicle drive actuator that can adjust the vehicle height with a simple configuration by using the power of an electric motor for driving wheels.

  Hereinafter, each means suitable for solving the above-described problems will be described with additional effects and the like as necessary.

1. An actuator for driving a vehicle comprising: an electric motor; and a wheel drive unit connected to the other end of a suspension spring having one end connected to the vehicle body side and transmitting the rotation of the electric motor to an axle to rotate the wheel. And
The vehicle drive unit includes a power distribution mechanism capable of distributing power from the electric motor to a plurality of units,
By the power distributed through the power distribution mechanism, the other end of the suspension spring can be driven up and down,
The power distribution mechanism is
A planetary gear mechanism capable of decelerating the rotation of the electric motor and transmitting it to the axle and distributing power;
Ri Do and a switching mechanism for switching the distribution state of the power by the planetary gear mechanism,
The planetary gear mechanism is configured to input rotation of the electric motor to a sun gear, output rotation from a planetary carrier to the axle, and drive the other end of the suspension spring up and down by power output from a ring gear. vehicle driving actuator, characterized in that it is.

According to the means 1, the power distribution mechanism provided in the vehicle drive unit distributes the power from the electric motor into a plurality of parts, and the other end of the suspension spring whose one end is connected to the vehicle body side by the distributed power. Driven up and down. Then, by driving the other end of the suspension spring up and down, the height (vehicle height) from the road surface of the vehicle body provided above the vehicle spring is reliably adjusted. For example, in a vehicle in which a vehicle drive unit is connected to the lower end of a suspension spring whose upper end is connected to the vehicle body side, when the number of passengers and load increases and the suspension spring contracts, the suspension spring is distributed via the power distribution mechanism. By driving the lower end of the suspension spring upward with the motive power, it can be maintained at a height equivalent to the vehicle height when empty. In other words, according to the present invention, it is possible to adjust the vehicle height with a simple structure using the power of the electric motor for driving the wheels provided on each wheel, regardless of the change in the load on the vehicle body. It is possible to secure a good ride comfort performance. Further, since the output shaft of the electric motor and the mounting position of the suspension spring can be arranged close to each other, the apparatus size can be reduced and the vehicle height can be adjusted with a relatively small torque.
Further, when the rotation of the electric motor is input to the sun gear, the planetary gear mechanism rotates the wheels by outputting the rotation from the planetary carrier to the axle. When the power distribution state by the planetary gear mechanism is switched by the switching mechanism, the vehicle height is adjusted by driving the other end of the suspension spring up and down by the power output from the ring gear.

2 . The vehicle drive actuator according to claim 1 , wherein the switching mechanism switches the ring gear between a fixed state and a released state.

According to the means 2 , when the switching mechanism makes the ring gear fixed, the planetary gear mechanism outputs the rotation to the axle by rotating the planetary gear when the rotation of the electric motor is input to the sun gear. Then, the wheel is driven to rotate. On the other hand, when the switching mechanism releases the ring gear, the planetary gear rotates and the ring gear meshing with it rotates to drive the other end of the suspension spring up and down.

3 . The vehicle drive actuator according to claim 2 , wherein the switching mechanism is constituted by an electromagnetic clutch.

According to the means 3 , since the switching mechanism is constituted by an electromagnetic clutch, the ring gear can be reliably switched between the fixed state and the released state with a simple configuration.

4 . A seat surface support member that supports the other end side seat surface of the suspension spring;
The vehicle driving actuator according to any one of means 1 to 3 , wherein the seating surface supporting member is engaged with a pin protruding from a side surface of the ring gear.

According to the means 4 , the seat surface support member that supports the seat surface on the other end side of the suspension spring is engaged with the pin protruding from the side surface of the ring gear. Thus, the vehicle height is adjusted by driving the other end of the suspension spring up and down.

  DESCRIPTION OF EMBODIMENTS Hereinafter, an embodiment of a vehicle drive actuator according to the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic configuration diagram showing a vehicle drive actuator A1 according to an embodiment of the present invention, and is a view of the vicinity of a left rear wheel of a vehicle as viewed from the front. FIG. 2 is a side view showing the vehicle drive actuator A1.

  As shown in FIGS. 1 and 2, the vehicle drive actuator A <b> 1 includes a motor generator 10, a wheel drive unit 30, a suspension spring 3, and a shock absorber 4. In FIG. 1, illustration of the shock absorber 4 is omitted, and illustration of the motor generator 10 is omitted in FIG. 2.

  The motor generator 10 is a device having both a function as a motor and a function as a generator, and a motor stator (not shown) as an armature having a three-phase armature winding on the radially outer side. This is an internal rotation type (inner rotor type) rotating electrical machine having a motor rotor (not shown) as a field magnet type rotor inside.

  As shown in FIG. 2, the wheel drive unit 30 includes a hub stay 31 and a planetary gear reduction mechanism 32 that is accommodated in the hub stay 31.

  The planetary gear speed reduction mechanism 32 holds a plurality (four) of planetary gears 35 meshing with the sun gear 34 and the ring gear 36 by a planetary carrier 37, and reduces the rotation of the motor shaft 13 to the axle shaft 33. It is a planetary gear mechanism that can transmit power and distribute power.

  The sun gear 34 is fixed to an end portion of the motor shaft 13 protruding from the surface of the housing 14 on the side of the vehicle.

  Each planetary gear 35 is disposed so as to mesh with the outer periphery of the sun gear 34, and is supported by each planetary shaft 38 fixed to the radial end of the planetary carrier 37. An axle shaft 33 is fixed at the center of the planetary carrier 37, and the axle shaft 33 is rotatably supported by a bearing 39 fixed to the hub stay 31.

  The ring gear 36 is arranged so that the gear tooth surface (inner teeth) of the inner peripheral portion meshes with the outer periphery of each planetary gear 35. Further, as shown in FIG. 3, a plurality of plate portions 36 a as friction plates are provided in a ring shape on the outer peripheral portion of the ring gear 36. Further, a round bar-like pin 7 projects from the center side surface of the ring gear 36 in the vehicle width direction.

  As shown in FIG. 3, an electromagnetic clutch 40 is disposed outside the ring gear 36 in the radial direction. FIG. 3 is a view showing the arrangement of the electromagnetic clutch 40 and the ring gear 36. A plurality of plate portions 40 a serving as friction plates are provided in a ring shape on the inner peripheral portion of the electromagnetic clutch 40. The plate portions 40a of the electromagnetic clutch 40 and the plate portions 36a of the ring gear 36 are alternately stacked. The electromagnetic clutch 40 is biased in the axial direction by a spring (not shown) in a non-energized state, and the ring gear 36 is fixed by the plate portions 40a pressing the plate portions 36a of the ring gear 36. doing. On the other hand, when the electromagnetic clutch 40 is energized, it is driven to the other side in the axial direction, and each plate portion 40a is separated from each plate portion 36a, so that the ring gear 36 is released and can rotate.

  The suspension spring 3 is a known coil spring. The upper seat surface 3 a is fixed to the upper presser 6 attached to the vehicle body 1, and the lower seat surface 3 b is fixed to the slider 5.

  The slider 5 has a flat horizontal portion 5a and a vertical portion 5b erected at a right angle from one end of the horizontal portion 5a. A lower seat surface 3b of the suspension spring 3 is fixed to the upper surface of the horizontal portion 5a. A long hole 5c that is long in the horizontal direction and in the vehicle front-rear direction is formed in the vertical portion 5b. The elongated hole 5c is a hole into which the pin 7 protruding from the center side surface in the vehicle width direction of the ring gear 36 is inserted and engaged, and the vertical width is set slightly larger than the diameter of the pin 7. . Therefore, the pin 7 is movable relative to the slider 5 in the horizontal direction while being inserted into the long hole 5 c of the slider 5.

  The shock absorber 4 is provided between the vehicle body 1 and the wheel drive unit 30 and has a function of stabilizing the vehicle body 1 by absorbing relative vibration between the vehicle body 1 and the wheel drive unit 30 by the suspension spring 3. . For example, the shock absorber 4 is divided into an oil chamber filled with oil and a gas chamber filled with high-pressure gas (not shown), and the cylinder 4a is provided at the tip of the piston rod 4b. It has the structure partitioned off by the piston which can move the inside of 4a up and down. The upper end of the piston rod 4 b is fixed to the upper presser 6 attached to the vehicle body 1, and the lower end of the cylindrical body 4 a is fixed to the hub stay 31.

  Next, the operation of each part in the vehicle drive actuator A1 having the above-described configuration will be described. FIG. 4 is an explanatory diagram showing the operation of each part of the planetary gear speed reduction mechanism 32 during vehicle travel.

  First, the operation during vehicle travel will be described. When the vehicle travels, the electromagnetic clutch 40 is not energized, and the ring gear 36 is fixed by friction between the plate portions 40 a of the electromagnetic clutch 40 and the plate portions 36 a of the ring gear 36. When the motor generator 10 is energized, the sun gear 34 rotates through the motor shaft 13 as the motor rotor rotates as shown in FIG. Since each planetary gear 35 revolves by the rotation of the sun gear 34, the decelerated rotation is transmitted to the axle shaft 33 via the planetary carrier 37, and the vehicle travels by rotating the wheels.

  Next, the effect | action at the time of vehicle height adjustment is demonstrated. FIG. 5 is a diagram showing a change in stroke of the suspension device composed of the suspension spring 3 and the shock absorber 4. FIG. 5A shows a case where no occupant is in the vehicle (hereinafter referred to as “when empty”). (B) shows a state in which the vehicle height is not adjusted when a prescribed number of passengers in the vehicle is on board (hereinafter referred to as “full ride”), and (c) shows a full state. Each figure shows a state in which the vehicle height adjustment is performed at the time of boarding. The vehicle height adjustment is performed when the vehicle is stopped.

  First, the empty time will be described. When the vehicle is empty, as shown in FIG. 5A, the stroke of the suspension spring 3 is not changed, so the vehicle height is a predetermined height based on an output signal from a vehicle height sensor (not shown). Is detected by a control device (not shown), and the vehicle height is not adjusted.

  Next, the case of full boarding will be described. FIG. 6 is an explanatory diagram showing the operation of each part of the planetary gear speed reduction mechanism 32 when the vehicle height is adjusted during full boarding. When the vehicle is fully ridden, if the vehicle height is not adjusted, the suspension spring 3 contracts as the load on the vehicle body 1 increases, and the stroke of the suspension device is shortened, as shown in FIG. Therefore, the vehicle height is lower than the predetermined height when the vehicle is empty. At this time, based on the output signal from the vehicle height sensor, it is detected by the control device that the vehicle height is lower than the predetermined height when the vehicle is empty, and the electromagnetic clutch 40 is energized and driven in the axial direction. Thereby, each plate part 40a of the electromagnetic clutch 40 is separated from each plate part 40a of the ring gear 36, and the ring gear 36 is released.

  Subsequently, when the motor generator 10 is energized and the motor rotor rotates counterclockwise, the sun gear 34 rotates counterclockwise via the motor shaft 13 as shown in FIG. At this time, since the planetary carrier 37 is fixed, each planetary gear 35 rotates clockwise, and the ring gear 36 meshing with each planetary gear 35 rotates clockwise.

  Then, the pin 7 moves upward as the ring gear 36 rotates, and the slider 5 engaged with the pin 7 moves upward through the elongated hole 7c, so that the suspension fixed to the horizontal portion 5a of the slider 5 is moved. When the lower seat surface 3b of the spring 3 is driven upward, the vehicle body 1 is raised. Although the horizontal position of the pin 7 also changes as the ring gear 36 rotates, the pin 7 can move horizontally in the elongated hole 7 c, so that the suspension spring 3 is related to the horizontal position of the pin 7. Can maintain a vertical posture.

  When the control device detects that the vehicle height has reached a predetermined height based on the output signal from the vehicle height sensor, the rotation of the motor rotor is stopped, the energization to the electromagnetic clutch 40 is stopped, and the ring gear 36 is It is fixed and the vehicle height adjustment is completed, and the state shown in FIG. In the state where the vehicle height adjustment is completed at the time of full boarding, as shown in FIGS. 5A and 5C, the same actual stroke as that when the vehicle is empty is secured in the suspension device.

  Next, a description will be given of the vehicle height adjustment when the occupant gets off and becomes empty after the vehicle height adjustment is performed at full boarding. FIG. 7 is an explanatory view showing the operation of each part of the planetary gear speed reduction mechanism 32 when the vehicle height is adjusted after returning from the full ride to the empty vehicle. In this case, the lower seat surface 3b of the suspension spring 3 moves upward, and the suspension spring 3 expands and the stroke becomes longer as the overall weight of the vehicle body 1 decreases. It is higher than a predetermined height (not shown). At this time, based on the output signal from the vehicle height sensor, it is detected by the control device that the vehicle height is higher than the predetermined height, and the electromagnetic clutch 40 is energized and driven in the axial direction. Thereby, each plate part 40a of the electromagnetic clutch 40 is separated from each plate part 40a of the ring gear 36, and the ring gear 36 is released.

  Subsequently, the motor generator 10 is energized and the motor rotor rotates clockwise, whereby the sun gear 34 rotates clockwise via the motor shaft 13. At this time, since the planetary carrier 37 is fixed, each planetary gear 35 rotates counterclockwise, and the ring gear 36 that meshes with each planetary gear 35 rotates counterclockwise.

  Then, the pin 7 moves downward as the ring gear 36 rotates, and the slider 5 engaged with the pin 7 moves downward through the elongated hole 7c, so that the suspension fixed to the horizontal portion 5a of the slider 5 is moved. When the lower seat surface 3b of the spring 3 is driven downward, the vehicle body 1 is lowered. When the control device detects that the vehicle height has reached a predetermined height based on the output signal from the vehicle height sensor, the rotation of the motor rotor is stopped, the energization to the electromagnetic clutch 40 is stopped, and the ring gear 36 is The vehicle height adjustment is completed by being fixed, and the state shown in FIG.

  As is clear from the above detailed description, the vehicle drive actuator A1 includes a motor generator 10 as an electric motor and a lower end (lower) of the suspension spring 3 whose upper end (upper seat surface 3a) is connected to the vehicle body 1 side. A wheel drive unit 30 connected to the side seating surface 3 b) and transmitting the rotation of the motor generator 10 to the axle shaft 33 to drive the wheels 2 to rotate. A planetary gear speed reduction mechanism 32 as a power distribution mechanism capable of distributing the power of the engine to a plurality of parts, and the lower seating surface 3b of the suspension spring 3 can be driven up and down by the power distributed via the planetary gear speed reduction mechanism 32 It is characterized by being configured. In other words, the stroke distributed by the suspension spring 3 for suspending the wheel drive unit 30 to the vehicle body 1 and the shock absorber 4 is varied by the power distributed via the planetary gear reduction mechanism 32. It is characterized by that.

  That is, according to the present embodiment, the planetary gear reduction mechanism 32 provided in the vehicle drive unit 30 distributes the power from the motor generator 10 to a plurality of power, and the power distributed via the planetary gear reduction mechanism 32 The lower seat surface 3b of the suspension spring 3 is driven up and down. Then, by driving the lower seat surface 3b of the suspension spring 3 up and down, the height (vehicle height) from the road surface of the vehicle body 1 provided on the upper side of the vehicle spring is reliably adjusted. For example, when the number of passengers or the load increases and the suspension spring 3 contracts, the lower seating surface 3b of the suspension spring 3 is driven upward by the power distributed through the planetary gear reduction mechanism 32. Thus, it can be maintained at a height equivalent to the vehicle height when empty. In other words, it is possible to adjust the vehicle height with a simple structure using the power of the motor generator 10 for driving the wheels provided on each wheel 2, which is good regardless of changes in the load on the vehicle body 1. Riding comfort performance can be secured. Further, since the motor shaft 13 that is the output shaft of the motor generator 10 and the mounting position of the suspension spring 3 can be placed close to each other, the apparatus size can be reduced and the vehicle height can be adjusted with a relatively small torque. Can do.

  In particular, the power distribution mechanism of the present invention switches the power distribution state by the planetary gear reduction mechanism 32 and the planetary gear reduction mechanism 32 that can reduce the rotation of the motor generator 10 and transmit it to the axle shaft 33 and distribute the power. It comprises an electromagnetic clutch 40 as a switching mechanism. That is, the planetary gear reduction mechanism 32 reduces the rotation of the motor generator 10 and transmits it to the axle shaft 33. Further, when the power distribution state by the planetary gear reduction mechanism 32 is switched by the electromagnetic clutch 40, the lower seat surface 3b of the suspension spring 3 is driven up and down by the power distributed by the planetary gear reduction mechanism 32. Thus, the vehicle height can be adjusted.

  More specifically, when the rotation of the motor generator 10 is input to the sun gear 34 in the planetary gear reduction mechanism 32 when the electromagnetic clutch 40 as the switching mechanism fixes the ring gear 36, the planetary gears 35 of the planetary gear 35. Due to the revolution, the planetary carrier 37 rotates and outputs rotation to the axle to drive the wheels to rotate. On the other hand, when the electromagnetic clutch 40 releases the ring gear 36, each planetary gear 35 rotates and the ring gear 36 that meshes with the planetary gear 35 rotates, so that the lower seat surface 3b of the suspension spring 3 moves up and down. Is done. Since the switching mechanism is constituted by the electromagnetic clutch 40, the ring gear 36 can be reliably switched between the fixed state and the released state with a simple configuration.

  Further, since the slider 5 as a seating surface supporting member for supporting the lower seating surface 3b of the suspension spring 3 is engaged with the pin 7 protruding from the side surface of the ring gear 36, the ring gear 36 rotates. Thus, the lower seat surface 3b of the suspension spring 3 is reliably driven up and down via the slider 5.

  Note that the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

For example, in the above embodiment , the motor generator 10 is disposed under the vehicle spring, and the sun gear of the planetary gear speed reduction mechanism 32 is directly connected to the motor shaft 13. However, the present invention is not limited to this. Hereinafter, a configuration of a modified vehicle driving actuator A2 in which the motor generator 10 is disposed on a vehicle spring will be described with reference to FIG. FIG. 8 is a schematic configuration diagram showing a vehicle drive actuator A2 of a modified example, and is a view of the vicinity of the left rear wheel of the vehicle viewed from the front. In addition, the same code | symbol is attached | subjected to the same member as embodiment mentioned above, and description about them is abbreviate | omitted.

  In this modification, the motor generator 10 is disposed on the vehicle body 1 side on the vehicle spring, and a driving force transmission mechanism 70 is provided between the motor generator 10 and the planetary gear reduction mechanism 30. Hereinafter, the configuration of the driving force transmission mechanism 70 will be mainly described.

  The driving force transmission mechanism 70 is a mechanism for transmitting the driving force of the motor generator 10 to the planetary gear reduction mechanism 30, and includes a spline shaft 72, miter gears 76 and 84, a spline nut 81, and the like. A bearing 73 and a bearing 74 are respectively fixed to the upper and lower portions of the housing 71, and the spline shaft 72 is rotatably supported by the bearings 73 and 74 at both upper and lower ends. A miter gear 75 is fixed to the end of the motor shaft 13 that protrudes from the motor generator 10 fixed to the vehicle body 1 side to the vehicle side. A miter gear 76 that meshes with the miter gear 75 is located above the spline shaft 72. It is fixed.

  A spline is provided on the outer peripheral portion of the spline shaft 72, and by engaging with the spline nut 81, rotational torque can be transmitted so as to be linearly movable. A bearing 82 fixed to the hub stay 31 is provided on the outer periphery of the spline nut 81, and the spline nut 81 is rotatably supported. Further, a miter gear 84 is fixed to the outer periphery of the spline nut 81.

  Further, the shaft 22 disposed in the left-right direction is rotatably supported by a bearing 23. The shaft 22 has a miter gear 24 fixed to the vehicle center side end, and the miter gear 24 meshes with the miter gear 84. A sun gear 34 of the planetary gear reduction mechanism 32 is fixed to the vehicle side end portion of the shaft 22, and power is transmitted to a plurality of planetary gears 35 provided on the outer periphery thereof. The torque of the revolution component of the planetary gear 35 is output to the axle shaft 33 via the planetary shaft 38 and the planetary plate 37.

  Also in the vehicle drive actuator A2 of this modification, the vehicle height can be adjusted with a simple structure using the power of the wheel drive motor generator 10 provided on each wheel, as in the above embodiment. Thus, the present invention has various effects such as ensuring good riding comfort performance regardless of changes in the load on the vehicle. Furthermore, since the motor generator 10 is provided on the upper side of the vehicle spring, the unsprung weight is reduced and the riding comfort performance can be further improved.

  The present invention is applicable to a vehicle equipped with a vehicle driving actuator equipped with an electric motor.

1 is a schematic configuration diagram illustrating a vehicle drive actuator according to an embodiment of the present invention, and is a view of the vicinity of a left rear wheel of a vehicle as viewed from the front. It is a side view which shows a vehicle drive actuator. It is a figure which shows arrangement | positioning of an electromagnetic clutch and a ring gear. It is explanatory drawing which shows the effect | action of each part of the planetary gear reduction mechanism at the time of vehicle travel. It is a figure which shows the stroke change of the suspension apparatus which consists of a spring for a suspension, and a shock absorber, (a) is the state at the time of an empty vehicle, (b) is the state where vehicle height adjustment is not performed at the time of full boarding, ( c) shows a state in which the vehicle height is adjusted during full boarding. It is explanatory drawing which shows the effect | action of each part of the planetary gear reduction mechanism in the case of performing vehicle height adjustment at the time of full boarding. It is explanatory drawing which shows the effect | action of each part of the planetary gear reduction mechanism in the case of performing vehicle height adjustment after returning from a full boarding to an empty vehicle. It is a schematic block diagram which shows the vehicle drive actuator of a modification, and is the figure which looked at the left rear-wheel periphery of the vehicle from the front.

Explanation of symbols

A1 Vehicle drive actuator (embodiment)
A2 Vehicle drive actuator (modification)
1 Car body 2 Wheel 3 Suspension spring (suspension spring, suspension system)
3b Lower seat surface (the other end of the suspension spring, the other end seat surface)
4 Shock absorber (suspension system)
5 Slider (seat surface support member)
7-pin 10 motor generator (electric motor)
30 wheel drive unit 32 planetary gear reduction mechanism (planetary gear mechanism, power distribution mechanism)
33 Axle shaft (axle)
34 Sun gear 35 Planetary gear 36 Ring gear 37 Planetary carrier 40 Electromagnetic clutch (switching mechanism, power distribution mechanism)

Claims (4)

An actuator for driving a vehicle comprising: an electric motor; and a wheel drive unit connected to the other end of a suspension spring having one end connected to the vehicle body side and transmitting the rotation of the electric motor to an axle to rotate the wheel. And
The vehicle drive unit includes a power distribution mechanism capable of distributing power from the electric motor to a plurality of units,
By the power distributed through the power distribution mechanism, the other end of the suspension spring can be driven up and down,
The power distribution mechanism is
A planetary gear mechanism capable of decelerating the rotation of the electric motor and transmitting it to the axle and distributing power;
A switching mechanism for switching the power distribution state by the planetary gear mechanism,
The planetary gear mechanism is configured to input rotation of the electric motor to a sun gear, output rotation from a planetary carrier to the axle, and drive the other end of the suspension spring up and down by power output from a ring gear. An actuator for driving a vehicle.   2. The vehicle drive actuator according to claim 1, wherein the switching mechanism switches the ring gear between a fixed state and a released state.   The vehicle drive actuator according to claim 2, wherein the switching mechanism is configured by an electromagnetic clutch. A seat surface support member that supports the other end side seat surface of the suspension spring;
4. The vehicle drive actuator according to claim 1, wherein the seating surface support member is engaged with a pin protruding from a side surface of the ring gear. 5.

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