JP2017089872A - Vehicle drive device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle drive device that can simplify a structure and reduce manufacturing cost.SOLUTION: The vehicle drive device 50 includes: single electric motor 1; a ring gear 2b rotating synchronously with a wheel; multiple pinion gears 21, 22 rotating when an output shaft 10 of the electric motor 1 rotates and engaging with the ring gear 2b while mutually having an interval in a circumferential direction of the ring gear 2b. Electric motor 1 drives so as to impart driving force equally to the multiple pinion gears 21, 22.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle drive device.

  Conventionally, as a vehicle drive device, there is one described in Patent Document 1. This vehicle drive device includes two electric motors, a ring gear directly connected to wheels, and two pinion gears. One pinion gear is driven by one electric motor, and the other pinion gear is driven by the other electric motor. Each pinion gear meshes with the ring gear. When two pinion gears are driven by two electric motors, a ring gear to which power is applied from the pinion gear rotates, and a wheel to which power is applied from the ring gear rotates.

JP 2007-145071 A

  The vehicle drive device of the cited document 1 requires the same number of motors as the number of pinion gears to drive the two pinion gears that drive the ring gear, and the manufacturing cost increases. In addition, when a plurality of electric motors are required, the same number of inverters for controlling the electric motor as the electric motors are required, so that a plurality of inverters are also required. Therefore, the manufacturing cost also increases from this point. Moreover, since a plurality of electric motors and inverters are required, the drive structure is complicated.

  The objective of this invention is providing the vehicle drive device which can simplify a structure and can also reduce manufacturing cost.

  The vehicle drive device according to the present invention has only one electric motor, a ring gear that rotates synchronously with the wheels, and rotates when the output shaft of the electric motor rotates, and is spaced apart from each other in the circumferential direction of the ring gear. A plurality of pinion gears meshed with the ring gear, and an equal driving force is applied to the plurality of pinion gears by driving the electric motor.

  According to the present invention, an equal driving force is applied to the plurality of pinion gears by only one electric motor. Therefore, the ring gear can be rotated by only one electric motor and only one inverter. Therefore, the structure of the vehicle drive device can be simplified and the manufacturing cost can be reduced.

  Further, in the vehicle drive device of the present invention, the drive gear provided on one end side of the output shaft of the electric motor, and a rotary shaft provided with a counter gear meshing with the drive gear, the plurality of pinion gears May include a first pinion gear provided on the rotating shaft and a second pinion gear provided on the other end side of the output shaft of the electric motor.

  In this case, the first pinion gear is provided on the rotary shaft provided with the counter gear that meshes with the drive gear provided on one end side of the output shaft. Accordingly, since the second pinion gear and the first pinion gear on the other end side of the output shaft are not arranged on the same straight line, the second pinion gear is prevented from intersecting the center axis of the ring gear. And the first pinion gear can be offset with respect to a plane including the center axis and the vertical direction of the ring gear. Therefore, since the first and second pinion gears can be arranged so that the line segment connecting the centroids of the first and second pinion gears intersects the center axis of the ring gear, the arrangement space for the first and second pinion gears can be increased. Thus, the driving force can be equally applied to the first and second pinion gears while keeping the diameters of the first and second pinion gears large. Therefore, sufficient mechanical strength can be ensured and a high reduction ratio can be obtained, and a high driving force can be output with high efficiency while reducing the size of the vehicle drive device.

  In the vehicle drive device of the present invention, a drive gear provided on one end side of the output shaft of the electric motor, a first rotating shaft provided with a first counter gear meshing with the drive gear, and the drive gear A second rotation shaft provided with a second counter gear meshing with the first rotation shaft, the plurality of pinion gears provided on the first rotation shaft and the second rotation shaft. A second pinion gear may be included.

  In this case, the rotation direction of the electric motor and the rotation direction of the two pinion gears are reversed, but the two pinion gears mesh in the same direction, and the rotation direction is also the same direction. Therefore, the driving force output from the electric motor can be transmitted efficiently.

  In this case, the plurality of pinion gears may further include a third pinion gear provided on the other end side of the output shaft of the electric motor.

  If it does in this way, the position which gives a driving force to a ring gear can be arranged globally and more uniformly by the peripheral direction, and a ring gear can be driven more stably. Further, since the force for driving the ring gear can be shared by the three pinion gears, the driving torque borne by each pinion gear can be reduced, and the damage of the pinion gears can be suppressed.

  Further, in the above case where the first and second counter gears are provided and the third pinion gear is not provided on the other end side of the output shaft, the first counter gear has the same number of teeth as the second counter gear. In addition, the number of teeth of the drive gear may be greater, and the output shaft may rotate at a higher speed than the first and second rotating shafts.

  If it does in this way, a motor can be rotated at high speed and can be reduced in size. Further, when the volume reduction of the electric motor is larger than the volume increase of the first and second counter gears, the vehicle drive device can be configured compactly and can be reduced in weight.

  In the vehicle drive device of the present invention, a first bevel gear provided on one end side of the output shaft of the electric motor, and a first rotating shaft provided with a second bevel gear meshing with the first bevel gear A second rotating shaft provided with a third bevel gear meshing with the first bevel gear, wherein the plurality of pinion gears includes a first pinion gear provided on the first rotating shaft, and the second rotating shaft. And a second pinion gear provided on the rotation shaft.

  In this case, the ring gear can be driven by the pinion gear provided on the rotating shaft that intersects the output shaft of the electric motor.

  Further, when the second and third bevel gears are provided, the second bevel gear has the same number of teeth as the third bevel gear and a number of teeth larger than the number of teeth of the first bevel gear. The output shaft may rotate at a higher speed than the first and second rotating shafts.

  If it does in this way, a motor can be rotated at high speed and can be reduced in size. In addition, when the volume reduction of the electric motor is larger than the volume increase of the second and third bevel gears, the vehicle drive device can be configured compactly and can be reduced in weight.

  According to the vehicle drive device of the present invention, the structure can be simplified and the manufacturing cost can be reduced.

It is a schematic cross section when the principal part of the vehicle drive device of 1st Embodiment is cut | disconnected by the cut surface containing a wheel rotating shaft. It is a schematic diagram when the structure around the ring gear of the vehicle drive device of 1st Embodiment is seen from the one side of the axial direction of a wheel rotating shaft. It is a schematic cross section corresponding to FIG. 1 in the vehicle drive device of 2nd Embodiment. It is a schematic diagram corresponding to FIG. 2 in the vehicle drive device of 2nd Embodiment. It is a schematic cross section corresponding to FIG. 1 in the vehicle drive device of 3rd Embodiment. It is a schematic diagram corresponding to FIG. 2 in the vehicle drive device of 3rd Embodiment. It is a schematic diagram corresponding to FIG. 2 in the vehicle drive device of 4th Embodiment. It is a schematic diagram explaining the mechanism which drives the pinion gear in the vehicle drive device of a modification. It is a schematic diagram explaining the mechanism which drives the pinion gear in the vehicle drive device of another modification. It is a schematic diagram explaining the mechanism which drives the pinion gear in the vehicle drive device of another modification. It is a schematic diagram explaining the mechanism which drives the pinion gear in the vehicle drive device of the further modification.

  Embodiments according to the present invention will be described below in detail with reference to the accompanying drawings. In this description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to the application, purpose, specification, and the like. In addition, when a plurality of embodiments and modifications are included in the following, it is assumed from the beginning that these characteristic portions are used in appropriate combinations. The drawings referred to in the description of the embodiments are schematically described, and the dimensional ratios of the components drawn in the drawings may be different from the actual ones, and the dimensional ratios are consistent among multiple drawings. May not be removed. In this specification, the description of “substantially **” is intended to include the case where substantially the entire region is recognized as well as the entire region.

(First embodiment)
FIG. 1 is a schematic cross-sectional view of a main part of the vehicle drive device 50 according to the first embodiment cut along a cut surface including the wheel rotation axis X. FIG. 2 is a view around the ring gear 2b of the vehicle drive device 50. It is a schematic diagram when the structure is viewed from one side in the axial direction of the wheel rotation axis X.

  As shown in FIG. 1, the vehicle drive device 50 includes only one electric motor 1, a wheel mounting member 2, and a housing 3. The electric motor 1 is energized and controlled in the rotational direction and rotational torque. In FIG. 1 and FIG. 2, illustration of wiring and circuits for controlling energization of the electric motor 1 is omitted. A hub 2 a for attaching a wheel (not shown) is provided at the vehicle outer end of the wheel attachment member 2. The wheel mounting member 2 is rotatable around a wheel rotation axis X that is substantially parallel to the vehicle width direction. A ring gear 2 b is provided at the vehicle inner end of the wheel mounting member 2. The wheel mounting member 2 has a flange portion 2c supported by the housing 3 through a rolling bearing or the like. The housing 3 supports the wheel mounting member 2 so as to be rotatable around the wheel rotation axis X. The housing 3 rotates together with the wheels around the turning shaft at the time of turning caused by a turning mechanism (not shown).

  As shown in FIG. 2, the electric motor 1 is disposed radially inward of the ring gear 2b. The housing of the electric motor 1 is fixed to a vehicle body (not shown). A drive gear 30 that rotates integrally with the output shaft 10 is provided on one end side of the output shaft 10 of the electric motor 1. The vehicle drive device 50 includes a rotating shaft 35 that extends substantially parallel to the output shaft 10. On the other end side of the rotation shaft 35, a counter gear 40 that rotates integrally with the rotation shaft 35 is provided. In the present specification, a driven gear that meshes with a drive gear provided on a drive shaft is referred to as a counter gear. The counter gear 40 meshes with the drive gear 30. The number of teeth of the counter gear 40 is the same as the number of teeth of the drive gear 30, and the rotation shaft 35 rotates at the same rotation speed as the output shaft 10. A first pinion gear 21 is provided on one end side of the rotation shaft 35. The first pinion gear 21 meshes with the ring gear 2b.

  Referring to FIG. 1 again, a second pinion gear 22 that rotates integrally with the output shaft 10 is provided on the other end side of the output shaft 10 of the electric motor 1. The second pinion gear 22 meshes with the ring gear 2 b on the other end side of the output shaft 10. Although not shown, the vehicle drive device 50 includes first and second rolling bearings. The first rolling bearing supports the output shaft 10 so as to be rotatable with respect to the housing 3 on one side of the first pinion gear 21. Similarly, the second rolling bearing supports the output shaft 10 so as to be rotatable with respect to the housing 3 on the other side of the second pinion gear 22.

  Briefly, one of the second pinion gears 22 is directly connected to the electric motor 1 that drives the second pinion gear 22, and the other first pinion gear 21 is rotated in the direction of rotation via the counter gear 40 and then the output shaft of the electric motor 1. 10 is connected. The number of teeth of the counter gear 40 is made the same as the number of teeth of the drive gear 30, and the rotary shaft 35 is rotated at the same rotational speed as the output shaft 10. The driving force output from the electric motor 1 is directly transmitted to the second pinion gear 22 from one shaft end side, and is transmitted to the first pinion gear 21 via the counter gear 40 from the other shaft end side. Can be evenly distributed to the two pinion gears 21 and 22.

  As shown in FIG. 2, the output shaft 10 is disposed at a distance from the wheel rotation axis X. The meshing surfaces of the drive gear 30 and the counter gear 40 are substantially positioned on a plane Y including the vertical direction passing through the central axis of the ring gear 2b. The first pinion gear 21 and the second pinion gear 22 are offset from the plane Y. A line segment connecting the centroids of the first and second pinion gears 21 and 22 substantially passes through the central axis of the ring gear 2b.

  The gears 22 and 30 can be provided integrally with the output shaft 10 as follows, for example. That is, first, a shaft member having a thick portion having a shape substantially corresponding to the gear at a location where the second pinion gear 22 is provided or a location where the drive gear 30 is provided is formed by forging or the like. Thereafter, a screw is formed on the thick portion by cutting, and the gears 22 and 30 are integrally provided on the output shaft 10. Alternatively, after the cylindrical output shaft 10 and the annular gears 22 and 30 having a threaded outer peripheral surface are separately formed, the annular gears 22 and 30 are output shafts by press fitting, cold fitting, shrink fitting or the like. The gears 22 and 30 are integrally provided on the output shaft 10 by being fitted into the predetermined positions of 10. These methods can be applied in all cases where the gear is provided integrally with the output shaft or the rotation shaft.

  According to the first embodiment, an equal driving force is applied to the plurality of pinion gears 21 and 22 by only one electric motor 1. Therefore, the ring gear can be rotated by only one electric motor 1 and only one inverter. Therefore, the structure of the vehicle drive device 50 can be simplified and the manufacturing cost can be reduced. Furthermore, since the first and second pinion gears 21 and 22 are offset with respect to the plane Y including the central axis and the vertical direction of the ring gear 2b, a large arrangement space for the first and second pinion gears 21 and 22 can be secured. It is possible to secure sufficient mechanical strength of the first and second pinion gears 21 and 22 and to obtain a high reduction ratio. Therefore, it is possible to output a high driving force with high efficiency while reducing the size of the vehicle driving device 50.

(Second Embodiment)
FIG. 3 is a schematic cross-sectional view corresponding to FIG. 1 in the vehicle drive device 150 of the second embodiment, and FIG. 4 is a schematic view corresponding to FIG. 2 of the vehicle drive device 150 of the second embodiment. In the second embodiment, the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the second embodiment, descriptions of the operations and effects common to the first embodiment are omitted, and only configurations and operations and effects different from those of the first embodiment are described.

  As shown in FIG. 4, in the vehicle drive device 150 of the second embodiment, a drive gear 130 is provided on one end side of the output shaft 10 of the electric motor 1. The vehicle drive device 150 includes a first rotation shaft 135 and a second rotation shaft 145. A first counter gear 140 that meshes with the drive gear 130 is provided on the other end side of the first rotating shaft 135, and a first pinion gear 120 that meshes with the ring gear 2 b is provided on one end side of the first rotating shaft 135. A second counter gear 141 that meshes with the drive gear 130 is provided on the other end side of the second rotating shaft 145, and a second pinion gear 121 that meshes with the ring gear 2b is provided on one end side of the second rotating shaft 145. It is done.

  The number of teeth of the drive gear 130 is the same as the number of teeth of the first counter gear 140 and the number of teeth of the second counter gear 141. As shown in FIG. 4, in the second embodiment, the output shaft 10 of the electric motor 1 is substantially positioned on a plane Y including the central axis of the ring gear 2 b and the vertical direction. Further, the first pinion gear 120 and the second pinion gear 121 are positioned substantially symmetrical with respect to the plane Y.

  According to the second embodiment, the rotation direction of the electric motor 1 and the rotation direction of the two pinion gears 120 and 121 are reversed, but the two pinion gears 120 and 121 mesh in the same direction, and the rotation direction is also the same direction. Therefore, the driving force output from the electric motor 1 can be transmitted efficiently.

  In the second embodiment, the case where the number of teeth of the drive gear 130 is the same as the number of teeth of the first counter gear 140 and the number of teeth of the second counter gear 141 has been described. However, the first counter gear has the same number of teeth as the second counter gear and a smaller number of teeth than the drive gear, and the output shaft rotates at a lower speed than the first and second rotating shafts. You may do it. The first counter gear has the same number of teeth as the second counter gear and a larger number of teeth than the drive gear, and the output shaft rotates at a higher speed than the first and second rotating shafts. You may do it. In this way, the electric motor can be reduced in size as well as rotated at high speed. Further, if the volume reduction of the electric motor is made larger than the volume increase of the first and second counter gears, the entire vehicle drive device can be configured compactly, and the weight reduction of the entire vehicle drive device can also be realized.

(Third embodiment)
FIG. 5 is a schematic cross-sectional view corresponding to FIG. 1 in the vehicle drive device 250 of the third embodiment, and FIG. 6 is a schematic view corresponding to FIG. 2 of the vehicle drive device 250 of the third embodiment. In the third embodiment, the same components as those of the second embodiment are denoted by the same reference numerals and description thereof is omitted. In the third embodiment, descriptions of the operations and effects common to the second embodiment are omitted, and only configurations and operations and effects different from those of the second embodiment are described.

  As shown in FIGS. 5 and 6, the third embodiment is different from the second embodiment only in that a third pinion gear 122 is provided on the other end side of the output shaft 10 of the electric motor 1. In the third embodiment, the other points are the same as in the second embodiment. For example, in the third embodiment, the number of teeth of the drive gear 130 is the same as the number of teeth of the first counter gear 140 and the number of teeth of the second counter gear 141 is the same. As shown in FIG. 6, the third pinion gear 122 meshes with the ring gear 2 b on the other end side of the output shaft 10.

  According to the said 3rd Embodiment, the position which gives a driving force to the ring gear 2b can be arrange | positioned globally and equally by the circumferential direction, and the ring gear 2b can be driven more stably. Further, since the driving force for driving the ring gear 2b can be shared by the three pinion gears 120, 121, 122, the driving torque borne by each pinion gear 120, 121, 122 can be reduced, and damage to the pinion gears 120, 121, 122 can be suppressed. .

(Fourth embodiment)
FIG. 7 is a schematic diagram corresponding to FIG. 2 in the vehicle drive device 350 of the fourth embodiment. In the fourth embodiment, the same components as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted. In the fourth embodiment, descriptions of the operations and effects common to the first embodiment are omitted, and only configurations and operations and effects different from those of the first embodiment are described.

  As shown in FIG. 7, the vehicle drive device 350 includes the electric motor 1. A first bevel gear 310 is provided on one end side of the output shaft 10 of the electric motor 1. The vehicle drive device 350 further includes a first rotation shaft 360 and a second rotation shaft 370. In this example, the first and second rotating shafts 360 and 370 extend in a direction substantially orthogonal to the extending direction of the output shaft 10, but one of the first and second rotating shafts is the output shaft of the motor. It can also extend in directions other than the direction substantially orthogonal to the extending direction.

  As shown in FIG. 7, a second bevel gear 311 that meshes with the first bevel gear 310 is provided on one end side of the first rotation shaft 360, and a first pinion gear 320 is provided on the other end side of the first rotation shaft 360. Provided. The first pinion gear 320 meshes with the ring gear 2b.

  The first and second rotating shafts 360 and 370 are located on substantially the same straight line. The second rotation shaft 370 is located at a distance from the first rotation shaft 360. A third bevel gear 312 that meshes with the first bevel gear 310 is provided on the other end side of the second rotation shaft 370, and a second pinion gear 321 is provided on one end side of the second rotation shaft 370. The second pinion gear 321 meshes with the ring gear 2b. As shown in FIG. 7, the second bevel gear 311 faces the third bevel gear 312 in the extending direction of the first rotation shaft 360. The second bevel gear 311 is located at a distance from the third bevel gear 312. The output shaft 10 of the electric motor 1 extends between the second bevel gear 311 and the third bevel gear 312 with a space between both the second and third bevel gears 311 and 312.

  The number of teeth of the second bevel gear 311 is the same as the number of teeth of the third bevel gear 312 and the number of teeth of the first bevel gear 310 is the same. In this example, the output shaft 10 of the electric motor 1 is substantially positioned on the plane Y including the central axis and the vertical direction of the ring gear 2b. However, the output shaft of the electric motor does not have to intersect the central axis of the ring gear, and the vertical direction It is also possible to extend in a direction that intersects with.

  In the above configuration, the power of the electric motor 1 is transmitted to the ring gear 2b as follows. That is, when the output shaft 10 of the electric motor 1 is rotated in the direction indicated by the arrow A in FIG. 7, the first rotating shaft 360 connected to the output shaft 10 via the first and second bevel gears 310 and 311 is illustrated. 7 is rotated in the direction indicated by the arrow B. At the same time, the second rotating shaft 370 connected to the output shaft 10 via the first and third bevel gears 310 and 312 rotates in the direction indicated by the arrow C in FIG. Move. Then, the first pinion gear 320 provided on the first rotation shaft 360 rotates in the direction indicated by the arrow D in FIG. 7 in the same direction as the first rotation shaft 360, and the second pinion gear provided on the second rotation shaft 370. 321 rotates in the direction indicated by an arrow E in FIG. Accordingly, the first pinion gear 320 located on the left side of FIG. 7 rotates the ring gear 2b from the bottom of the page, and the second pinion gear 321 located on the right side of FIG. 7 moves the ring gear 2b from the top to the bottom of the page. Since the ring gear 2b is rotated, the ring gear 2b is rotated clockwise as indicated by an arrow F in FIG.

  According to the fourth embodiment, the first and second pinion gears 320 and 321 are connected to the output shaft 10 of the electric motor 1 via the second bevel gear 311 or the third bevel gear 312 and the first bevel gear 310. The Therefore, the ring gear 2b can be driven by the pinion gears 320 and 321 provided on the rotary shafts 360 and 370 that intersect the output shaft 10 of the electric motor 1 at an angle of approximately 90 °.

  In the fourth embodiment, the case where the number of teeth of the first bevel gear 310 is the same as the number of teeth of the second bevel gear 311 and the number of teeth of the third bevel gear 312 is described. However, the second bevel gear has the same number of teeth as the third bevel gear and a smaller number of teeth than the first bevel gear, and the output shaft is slower than the first and second rotating shafts. You may make it rotate. In addition, the second bevel gear has the same number of teeth as the third bevel gear and a larger number of teeth than the first bevel gear, and the output shaft is faster than the first and second rotation shafts. You may make it rotate. In this way, the electric motor can be reduced in size as well as rotated at high speed. Further, if the volume reduction of the electric motor is made larger than the volume increase of the first bevel gear, the second bevel gear, and the third bevel gear, the entire vehicle drive device can be made compact, and the overall weight of the vehicle drive device can be reduced.

  The present invention is not limited to the first to fourth embodiments and the modifications thereof, and various improvements and modifications can be made within the scope of matters described in the claims of the present application and their equivalent scope. It is.

  For example, in the first to fourth embodiments, the case where the ring gear 2b is rotated by the driving force of the electric motor 1 has been described. However, it goes without saying that the rotational power of the wheels may be transmitted to the electric motor 1 via the ring gear 2b to generate power by the electric motor 1, and the electric power generated by the regeneration may be charged to the battery of the vehicle.

  Moreover, although the said 1st and 4th embodiment demonstrated the case where the output shaft 10 of an electric motor extended substantially parallel to a perpendicular direction, the output shaft of an electric motor has extended in any direction which cross | intersects a perpendicular direction. Also good.

  In the present invention, it is only necessary that an equal driving force is applied to the plurality of pinion gears by driving the electric motor, and many modifications can be considered in addition to the above-described embodiments or modifications.

  For example, as shown in FIG. 8, that is, a schematic diagram illustrating a mechanism for driving a pinion gear in the vehicle drive device 400 according to the modification, the first and second bevel gears 410 and 450 are connected to the output shaft 10 of the electric motor 1. You may provide in two steps with the same attitude | position on the one side of the main body 7. FIG. In this case, the third bevel gear 411 and the fourth bevel gear 412 are meshed with the first bevel gear 410 on the side close to the electric motor body 7, and the fifth bevel gear 451 and the second bevel gear 450 on the side far from the electric motor main body 7 are engaged. The sixth bevel gear 452 is engaged. A rotation shaft 460 provided with a third bevel gear 411, a rotation shaft 470 provided with a fourth bevel gear 412, a rotation shaft 480 provided with a fifth bevel gear 451, and a sixth bevel gear 452 are provided. A pinion gear is provided on one side of each of the rotating shafts 490.

  In this case, the gear ratio of the third bevel gear 411 to the first bevel gear 410, the gear ratio of the fourth bevel gear 412 to the first bevel gear 410, the gear ratio of the fifth bevel gear 451 to the second bevel gear 450, and The gear ratio of the sixth bevel gear 452 to the second bevel gear 450 is the same. Here, it is preferable to set the gear ratio to be larger than 1 because the output shaft 10 can be rotated at a higher speed than the rotary shafts 460, 470, 480, and 490.

  Further, as shown in FIG. 9, that is, a schematic diagram illustrating a mechanism for driving the pinion gear in the vehicle drive device 500 of another modification, a first bevel gear 510 is provided on one side of the electric motor body 7 in the output shaft 10. The first and second bevel gears 510 and 550 may be provided in two stages on the output shaft 10 such that the second bevel gear 550 is provided on the other side of the motor body 7 in the output shaft 10. In this case, the rotation shaft 560 provided with the third bevel gear 511 that meshes with the first bevel gear 510 is provided with a pinion gear that meshes with the ring gear, and the rotation provided with the fourth bevel gear 512 that meshes with the first bevel gear 510. A pinion gear that meshes with the ring gear is provided on the shaft 570. Similarly, a pinion gear that meshes with the ring gear is provided on the rotary shaft 580 provided with the fifth bevel gear 551 that meshes with the second bevel gear 550, and a sixth bevel gear 552 that meshes with the second bevel gear 550 is provided. The rotation shaft 590 is provided with a pinion gear that meshes with the ring gear. In this case, similarly to the modification shown in FIG. 8, the gear ratios of the bevel gears 510, 511, 512, 550, 551, 552 that mesh with each other are set appropriately, and the rotation shafts 560, 570, 580, 590 are used. Also, it is preferable to rotate the output shaft 10 at a high speed.

  Further, as shown in FIG. 10, that is, a schematic diagram illustrating a mechanism for driving a pinion gear in a vehicle drive device 600 of another modification, the first bevel gear 610 and the drive gear 650 are included, and the drive gear 650 is the motor body. You may provide in the one side of the electric motor main body 7 in the output shaft 10 so that it may be located in the side far from 7. FIG. In this case, the rotation shaft 660 provided with the second bevel gear 611 that meshes with the first bevel gear 610 is provided with a pinion gear that meshes with the ring gear, and the third bevel gear 612 that meshes with the first bevel gear 610 is provided. A pinion gear that meshes with the ring gear is provided on the shaft 670. Further, a pinion gear that meshes with the ring gear is provided on the rotation shaft 680 provided with the first counter gear 651 that meshes with the drive gear 650, and the rotation shaft 690 provided with the second counter gear 652 that meshes with the drive gear 650 is connected to the ring gear. An intermeshing pinion gear is provided. In this way, an equal driving force may be applied to the plurality of pinion gears by driving the electric motor 1.

  In this case, the gear ratio of the second bevel gear 611 to the first bevel gear 610, the gear ratio of the third bevel gear 612 to the first bevel gear 610, the gear ratio of the first counter gear 651 to the drive gear 650, and the drive gear The gear ratio of the second counter gear 652 to 650 matches. Here, it is preferable to set the gear ratio larger than 1 because the output shaft 10 can be rotated at a higher speed than the rotary shafts 660, 670, 680, and 690.

  Further, as shown in FIG. 11, that is, a schematic diagram illustrating a mechanism for driving the pinion gear in the vehicle drive device 700 according to a further modification, a first umbrella is provided on one side of the motor body 7 of the motor 1 in the output shaft 10. A gear 710 may be provided, and a drive gear 750 may be provided on the other side of the motor body 7 on the output shaft 10. In this case, the rotation shaft 760 provided with the second bevel gear 711 that meshes with the first bevel gear 710 is provided with a pinion gear that meshes with the ring gear, and the rotation provided with the third bevel gear 712 that meshes with the first bevel gear 710. A shaft 770 is provided with a pinion gear that meshes with the ring gear. Similarly, a pinion gear that meshes with the ring gear is provided on the rotation shaft 780 provided with the first counter gear 751 that meshes with the drive gear 750, and a rotation shaft 790 that is provided with the second counter gear 752 that meshes with the drive gear 750. Is provided with a pinion gear meshing with the ring gear. In this case, similarly to the modification shown in FIG. 10, the gear ratios of the gears 710, 711, 712, 750, 751, 752 that mesh with each other are set appropriately, and more than the rotary shafts 760, 770, 780, 790. It is preferable to rotate the output shaft 10 at a high speed.

  In the modification shown in FIGS. 8 to 11 in which two bevel gears are provided on the output shaft 10 of the electric motor 1 or one bevel gear and one drive gear are provided on the output shaft 10 of the electric motor, Each gear provided on the output shaft 10 meshed with two gears. However, when two bevel gears are provided on the output shaft of the motor, or when one bevel gear and one drive gear are provided on the output shaft of the motor, one or two gears provided on the output shaft are 1 Needless to say, only one gear needs to be engaged. When the bevel gears and counter gears are appropriately combined as shown in these examples, the number of pinion gears that can apply an equal driving force to the ring gear in the same rotational direction by driving the electric motor can be appropriately increased.

  DESCRIPTION OF SYMBOLS 1 Electric motor, 2b Ring gear, 10 Motor output shaft, 21 1st pinion gear, 22 2nd pinion gear, 30 Drive gear, 35 Rotary shaft, 40 Counter gear, 120 1st pinion gear, 121 2nd pinion gear 122 3rd pinion gear, 130 Drive Gear, 135 first rotating shaft, 140 first counter gear, 141 second counter gear, 145 second rotating shaft, 310 first bevel gear, 311 second bevel gear, 312 third bevel gear, 320 first pinion gear, 321 A second pinion gear, 360 a first rotating shaft, and 370 a second rotating shaft;

Claims (7)

Only one electric motor,
A ring gear that rotates synchronously with the wheels;
A plurality of pinion gears that rotate when the output shaft of the electric motor rotates, and mesh with the ring gear in a state of being spaced apart from each other in the circumferential direction of the ring gear;
With
A vehicle driving apparatus in which an equal driving force is applied to the plurality of pinion gears by driving the electric motor. In the vehicle drive device according to claim 1,
A drive gear provided on one end side of the output shaft of the electric motor;
A rotating shaft provided with a counter gear meshing with the drive gear;
With
In the plurality of pinion gears,
A first pinion gear provided on the rotating shaft;
A second pinion gear provided on the other end side of the output shaft of the electric motor;
A vehicle drive device including: In the vehicle drive device according to claim 1,
A drive gear provided on one end side of the output shaft of the electric motor;
A first rotating shaft provided with a first counter gear meshing with the drive gear;
A second rotating shaft provided with a second counter gear meshing with the drive gear;
With
In the plurality of pinion gears,
A first pinion gear provided on the first rotation shaft;
A second pinion gear provided on the second rotating shaft;
A vehicle drive device including: The vehicle drive device according to claim 3,
The plurality of pinion gears include a third pinion gear provided on the other end side of the output shaft of the electric motor. The vehicle drive device according to claim 3,
The first counter gear has the same number of teeth as the second counter gear and a larger number of teeth than the drive gear, and the output shaft is faster than the first and second rotating shafts. Vehicle drive device that rotates at In the vehicle drive device according to claim 1,
A first bevel gear provided on one end side of the output shaft of the electric motor;
A first rotating shaft provided with a second bevel gear meshing with the first bevel gear;
A second rotating shaft provided with a third bevel gear meshing with the first bevel gear;
With
In the plurality of pinion gears,
A first pinion gear provided on the first rotation shaft;
A second pinion gear provided on the second rotating shaft;
A vehicle drive device including: The vehicle drive device according to claim 6,
The second bevel gear has the same number of teeth as the third bevel gear and a larger number of teeth than the first bevel gear, and the output shaft is more than the first and second rotation shafts. A vehicle drive that also rotates at high speed.

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