JP7456127B2 - drive wheel drive device - Google Patents

drive wheel drive device Download PDF

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JP7456127B2
JP7456127B2 JP2019206694A JP2019206694A JP7456127B2 JP 7456127 B2 JP7456127 B2 JP 7456127B2 JP 2019206694 A JP2019206694 A JP 2019206694A JP 2019206694 A JP2019206694 A JP 2019206694A JP 7456127 B2 JP7456127 B2 JP 7456127B2
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driving force
rotating member
drive
gear
pinion gear
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JP2021079741A (en
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竜之介 古澤
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Mitsubishi Motors Corp
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Description

本開示は、車両の一対の駆動輪を駆動させる駆動輪駆動装置に関する。 The present disclosure relates to a drive wheel drive device that drives a pair of drive wheels of a vehicle.

特許文献１には、左右の駆動輪の間にデファレンシャルギアと駆動力調整機構とを有し、左右の駆動輪への駆動力の配分を調整する車両用左右駆動力調整装置が記載されている。車両の旋回時には、左右の駆動輪間に適切なトルク差を与えることが必要である。 Patent Document 1 describes a left-right drive force adjustment device for a vehicle that has a differential gear and a drive force adjustment mechanism between left and right drive wheels, and adjusts the distribution of drive force to the left and right drive wheels. . When a vehicle turns, it is necessary to provide an appropriate torque difference between the left and right drive wheels.

特開２０１３－１７３５２７号公報Japanese Patent Application Publication No. 2013-173527

しかしながら、特許文献１に記載の車両用左右駆動力調整装置では、左右の駆動輪間に与えるトルク差を任意に調整して、車両の旋回性を調整することは困難であった。 However, with the left-right driving force adjustment device for a vehicle described in Patent Document 1, it is difficult to adjust the turning performance of the vehicle by arbitrarily adjusting the torque difference applied between the left and right drive wheels.

上述の事情に鑑みて、本開示の少なくとも１つの実施形態は、車両の旋回性を調整可能にする駆動輪駆動装置を提供することを目的とする。 In view of the above-mentioned circumstances, at least one embodiment of the present disclosure aims to provide a drive wheel drive device that allows the turning performance of a vehicle to be adjusted.

本開示の少なくとも１つの実施形態に係る駆動輪駆動装置は、車両の一対の駆動輪を駆動させる駆動輪駆動装置であって、一対の駆動輪を駆動させるための駆動力を与える第１駆動力源及び第２駆動力源と、第１駆動力源及び第２駆動力源のそれぞれからの駆動力を一対の駆動輪のそれぞれに分配するデファレンシャルギアであって、デフケースと、デフケース内に収容されたサイドギアと、デフケース内に収容され一対のサイドギアと噛み合うピニオンギアとを備えるデファレンシャルギアと、デフケースの外部に設けられるとともに第１駆動力源からの駆動力によって回転可能に構成された第１回転部材と、デフケースの外部に設けられるとともに第２駆動力源からの駆動力によって回転可能に構成された第２回転部材と、第１回転部材及び第２回転部材のそれぞれの回転をピニオンギアに伝達する伝達部材とを備える。この構成によると、車両の旋回時に、第１駆動力源又は第２駆動力源の少なくとも一方からの駆動力を調整することにより一対の駆動輪間のトルク差を調整できるので、車両の旋回性を調整することができる。 A drive wheel drive device according to at least one embodiment of the present disclosure is a drive wheel drive device that drives a pair of drive wheels of a vehicle, and includes a first drive force that provides a drive force for driving the pair of drive wheels. a differential gear that distributes driving force from each of the first driving force source and the second driving force source to each of the pair of driving wheels, the differential gear comprising: a differential case; and a differential gear housed within the differential case; a differential gear comprising a side gear and a pinion gear housed in a differential case and meshing with the pair of side gears; and a first rotating member provided outside the differential case and configured to be rotatable by a driving force from a first driving force source. a second rotating member provided outside the differential case and configured to be rotatable by a driving force from a second driving force source; and transmitting rotation of each of the first rotating member and the second rotating member to the pinion gear. A transmission member. According to this configuration, when the vehicle turns, the torque difference between the pair of drive wheels can be adjusted by adjusting the driving force from at least one of the first driving force source and the second driving force source, so that the turning performance of the vehicle is improved. can be adjusted.

いくつかの実施形態では、第１駆動力源と第１回転部材とは、第１駆動力源の第１出力軸につながる第１ドライブピニオンギアと、第１回転部材に固定された第１リングギアとが噛み合うことで接続され、第２駆動力源と第２回転部材とは、第２駆動力源の第２出力軸につながる第２ドライブピニオンギアと、第２回転部材に固定された第２リングギアとが噛み合うことで接続され、第１ドライブピニオンギアと第１リングギアとの組み合わせ、及び、第２ドライブピニオンギアと第２リングギアとの組み合わせがいずれも傘歯車であってもよい。この構成によると、第１駆動力源及び第２駆動力源がそれぞれモータである場合、モータの回転が車両の進行方向に対して垂直な方向になり、車両の加減速とは無関係になるので、車両のゆれを低減することができる。 In some embodiments, the first driving force source and the first rotating member include a first drive pinion gear connected to a first output shaft of the first driving force source and a first ring fixed to the first rotating member. The second driving force source and the second rotating member are connected by meshing with the gears, and the second drive pinion gear connected to the second output shaft of the second driving force source and the second drive pinion gear connected to the second rotating member are connected by meshing with the second driving force source. The two ring gears may be connected by meshing with each other, and both the combination of the first drive pinion gear and the first ring gear and the combination of the second drive pinion gear and the second ring gear may be bevel gears. . According to this configuration, when the first driving force source and the second driving force source are each a motor, the rotation of the motor is perpendicular to the direction of travel of the vehicle and is independent of acceleration and deceleration of the vehicle. , the vibration of the vehicle can be reduced.

いくつかの実施形態では、第１駆動力源と第１回転部材とは、第１駆動力源の第１出力軸につながる第１ドライブピニオンギアと、第１回転部材に固定された第１リングギアとが噛み合うことで接続され、第２駆動力源と第２回転部材とは、第２駆動力源の第２出力軸につながる第２ドライブピニオンギアと、第２回転部材に固定された第２リングギアとが噛み合うことで接続され、第１ドライブピニオンギアと第１リングギアとの組み合わせ、及び、第２ドライブピニオンギアと第２リングギアとの組み合わせがいずれも平歯車車であってもよい。 In some embodiments, the first driving force source and the first rotating member include a first drive pinion gear connected to a first output shaft of the first driving force source and a first ring fixed to the first rotating member. The second driving force source and the second rotating member are connected by meshing with the gears, and the second drive pinion gear connected to the second output shaft of the second driving force source and the second drive pinion gear connected to the second rotating member are connected by meshing with the second driving force source. Even if the two ring gears are connected by meshing with each other, and both the combination of the first drive pinion gear and the first ring gear and the combination of the second drive pinion gear and the second ring gear are spur gears. good.

いくつかの実施形態では、第１駆動力源と第１回転部材とは、第１駆動力源の第１出力軸につながる第１ドライブピニオンギアと、第１回転部材に固定された第１リングギアとが噛み合うことで接続され、第２駆動力源と第２回転部材とは、第２駆動力源の第２出力軸につながる第２ドライブピニオンギアと、第２回転部材に固定された第２リングギアとが噛み合うことで接続され、第１ドライブピニオンギアと第１リングギアとの組み合わせ、及び、第２ドライブピニオンギアと第２リングギアとの組み合わせのいずれか一方が平歯車で他方が傘歯車であってもよい。 In some embodiments, the first driving force source and the first rotating member include a first drive pinion gear connected to a first output shaft of the first driving force source, and a first ring fixed to the first rotating member. The second drive force source and the second rotating member are connected by meshing with the gears, and the second drive pinion gear connected to the second output shaft of the second drive force source and the second drive pinion gear fixed to the second rotating member are connected to each other by meshing with the gears. The two ring gears are connected by meshing with each other, and one of the combinations of the first drive pinion gear and the first ring gear and the combination of the second drive pinion gear and the second ring gear is a spur gear and the other is a spur gear. It may also be a bevel gear.

いくつかの実施形態では、第１回転部材と第２回転部材とを連結してそれらとともに回転可能に構成された連結機構を備えてもよい。この構成によると、第１駆動力源又は第２駆動力源のいずれか一方が故障したときでも、連結機構によって第１回転部材と第２回転部材とを連結させることにより、第１駆動力源又は第２駆動力源のうちの故障していない他方の駆動力源の駆動力のみによって車両を走行させることができる。 Some embodiments may include a coupling mechanism configured to couple the first rotating member and the second rotating member so as to be rotatable therewith. According to this configuration, even when either the first driving force source or the second driving force source fails, the first driving force source Alternatively, the vehicle can be driven only by the driving force of the other non-faulty driving force source among the second driving force sources.

本開示の少なくとも１つの実施形態によれば、車両の旋回時に、第１駆動力源又は第２駆動力源の少なくとも一方からの駆動力を調整することにより一対の駆動輪間のトルク差を調整できるので、車両の旋回性を調整することができる。 According to at least one embodiment of the present disclosure, when the vehicle turns, the torque difference between the pair of driving wheels is adjusted by adjusting the driving force from at least one of the first driving power source and the second driving power source. Therefore, the turning performance of the vehicle can be adjusted.

本開示の一実施形態に係る駆動輪駆動装置の構成を示す模式図である。FIG. 1 is a schematic diagram showing the configuration of a drive wheel drive device according to an embodiment of the present disclosure. 本開示の一実施形態に係る駆動輪駆動装置の変形例の構成を示す模式図である。It is a schematic diagram showing the structure of the modification of the drive wheel drive device concerning one embodiment of this indication. 本開示の一実施形態に係る駆動輪駆動装置の別の変形例の構成を示す模式図である。It is a schematic diagram which shows the structure of another modification of the drive wheel drive device based on one Embodiment of this indication. 本開示の一実施形態に係る駆動輪駆動装置のさらに別の変形例の構成を示す模式図である。FIG. 7 is a schematic diagram showing the configuration of yet another modification of the drive wheel drive device according to an embodiment of the present disclosure. 本開示の一実施形態に係る駆動輪駆動装置に設けられた連結機構の一例の構成を示す図である。FIG. 2 is a diagram illustrating the configuration of an example of a coupling mechanism provided in a drive wheel drive device according to an embodiment of the present disclosure.

以下、図面を参照して本発明のいくつかの実施形態の中から、サイドギアと噛み合うピニオンギアが２個の場合の例について説明する。ただし、本発明の範囲は以下の実施形態に限定されるものではない。以下の実施形態に記載されている構成部品の寸法、材質、形状、その相対配置などは、本発明の範囲をそれにのみ限定する趣旨ではなく、単なる説明例に過ぎない。更には、第１駆動力源と第２駆動力源とは、それぞれ別体であっても、筐体を共有する一体であってもよい。 Hereinafter, an example in which there are two pinion gears that mesh with the side gear will be described from among some embodiments of the present invention with reference to the drawings. However, the scope of the present invention is not limited to the following embodiments. The dimensions, materials, shapes, relative arrangements, etc. of the components described in the following embodiments are not intended to limit the scope of the present invention, and are merely illustrative examples. Furthermore, the first driving force source and the second driving force source may be separate bodies, or may be a single unit that shares a housing.

図１には、車両の一対の駆動輪、すなわち左車輪１０１及び右車輪１０２を駆動させるための本開示の一実施形態に係る駆動輪駆動装置１の構成が模式的に示されている。駆動輪駆動装置１は、左車輪１０１及び右車輪１０２を駆動させるための駆動力を与える第１駆動力源及び第２駆動力源である第１モータ２及び第２モータ３と、第１モータ２及び第２モータ３からの駆動力を左車輪１０１及び右車輪１０２のそれぞれに分配するデファレンシャルギア４と、第１モータ２及び第２モータ３からの駆動力をデファレンシャルギア４に伝達するための歯車機構５とを備えている。 FIG. 1 schematically shows the configuration of a drive wheel drive device 1 according to an embodiment of the present disclosure for driving a pair of drive wheels of a vehicle, that is, a left wheel 101 and a right wheel 102. The driving wheel drive device 1 includes a first motor 2 and a second motor 3, which are a first driving power source and a second driving power source that provide driving force for driving the left wheel 101 and the right wheel 102, and a first motor a differential gear 4 for distributing the driving force from the first motor 2 and the second motor 3 to the left wheel 101 and the right wheel 102, respectively; and a differential gear 4 for transmitting the driving force from the first motor 2 and the second motor 3 to the differential gear 4. A gear mechanism 5 is provided.

デファレンシャルギア４は、デフケース１２と、デフケース１２内に収容された一対のサイドギア１３，１４と、デフケース１２内に収容され一対のサイドギア１３，１４と噛み合うピニオンギア１５，１６とを備えている。 The differential gear 4 includes a differential case 12, a pair of side gears 13 and 14 housed within the differential case 12, and pinion gears 15 and 16 housed within the differential case 12 and meshing with the pair of side gears 13 and 14.

歯車機構５は、第１モータ２の第１出力軸２１につながる第１ドライブピニオンギア２２と噛み合う第１リングギア１１と、第１リングギア１１が固定された第１回転部材１７と、第１回転部材１７に固定された第３リングギア１８と、第２モータ３の第２出力軸３１につながる第２ドライブピニオンギア３２と噛み合う第２リングギア４１と、第２リングギア４１が固定された第２回転部材４２と、第２回転部材４２に固定された第４リングギア４３と、第１回転部材１７及び第２回転部材４２の回転をピニオンギア１５，１６に伝達する伝達部材４４，４５とを備えている。伝達部材４４は、第３リングギア１８及び第４リングギア４３と噛み合う第２ピニオンギア４６と、第２ピニオンギア４６とピニオンギア１５とを接続する伝達シャフト４８とを備えている。伝達部材４５は、第３リングギア１８及び第４リングギア４３と噛み合う第２ピニオンギア４７と、第２ピニオンギア４７とピニオンギア１６とを接続する伝達シャフト４９とを備えている。伝達シャフト４８，４９はそれぞれ、デフケース１２を貫通している。 The gear mechanism 5 includes a first ring gear 11 that meshes with a first drive pinion gear 22 connected to a first output shaft 21 of the first motor 2, a first rotating member 17 to which the first ring gear 11 is fixed, and a first A third ring gear 18 fixed to the rotating member 17, a second ring gear 41 that meshes with a second drive pinion gear 32 connected to the second output shaft 31 of the second motor 3, and a second ring gear 41 fixed to the rotating member 17. A second rotating member 42 , a fourth ring gear 43 fixed to the second rotating member 42 , and transmission members 44 and 45 that transmit the rotation of the first rotating member 17 and the second rotating member 42 to the pinion gears 15 and 16 It is equipped with The transmission member 44 includes a second pinion gear 46 that meshes with the third ring gear 18 and the fourth ring gear 43, and a transmission shaft 48 that connects the second pinion gear 46 and the pinion gear 15. The transmission member 45 includes a second pinion gear 47 that meshes with the third ring gear 18 and the fourth ring gear 43, and a transmission shaft 49 that connects the second pinion gear 47 and the pinion gear 16. The transmission shafts 48 and 49 each pass through the differential case 12.

デファレンシャルギア４のサイドギア１３，１４、及びピニオンギア１５，１６はそれぞれ傘歯車である。第１回転部材１７の第１リングギア１１及び第３リングギア１８はそれぞれ傘歯車である。第２回転部材４２の第２リングギア４１及び第４リングギア４３はそれぞれ傘歯車である。伝達部材４４，４５それぞれの第２ピニオンギア４６，４７はそれぞれ傘歯車である。第１モータ２の第１ドライブピニオンギア２２及び第２モータ３の第２ドライブピニオンギア３２はそれぞれ傘歯車である。また、第１回転部材１７及び第２回転部材４２は、筒状形状、例えば円筒形状を有し、それらの軸方向にデフケース１２の一部が第１回転部材１７及び第２回転部材４２のそれぞれの内部に挿入されるように構成してもよい。 The side gears 13, 14 and pinion gears 15, 16 of the differential gear 4 are each bevel gears. The first ring gear 11 and the third ring gear 18 of the first rotating member 17 are each bevel gears. The second ring gear 41 and the fourth ring gear 43 of the second rotating member 42 are each bevel gears. The second pinion gears 46 and 47 of the transmission members 44 and 45 are respectively bevel gears. The first drive pinion gear 22 of the first motor 2 and the second drive pinion gear 32 of the second motor 3 are each bevel gears. Further, the first rotating member 17 and the second rotating member 42 have a cylindrical shape, for example, a cylindrical shape, and a part of the differential case 12 is located in the axial direction of the first rotating member 17 and the second rotating member 42, respectively. It may be configured to be inserted inside the.

次に、本開示の一実施形態に係る駆動輪駆動装置１の動作について説明する。左車輪１０１及び右車輪１０２は、第１モータ２及び第２モータ３から与えられる駆動力によって駆動される。第１モータ２が稼働して、第１出力軸２１及び第１ドライブピニオンギア２２が図１における左方向（矢印Ａの方向）に回転すると、第１ドライブピニオンギア２２と噛み合う第１リングギア１１が矢印Ｂの方向に回転し、第１リングギア１１が固定された第１回転部材１７も矢印Ｂの方向に回転する。これと同時に、第２モータ３が稼働して、第２出力軸３１及び第２ドライブピニオンギア３２が図１における右方向（矢印Ｅの方向）に回転すると、第２ドライブピニオンギア３２と噛み合う第２リングギア４１が矢印Ｆの方向に回転し、第２リングギア４１が固定された第２回転部材４２も矢印Ｆの方向に回転する。第１モータ２及び第２モータ３それぞれの回転速度を調整すれば、第１回転部材１７の矢印Ｂ方向の回転速度と第２回転部材４２の矢印Ｆ方向の回転速度とが同じになるので、第２ピニオンギア４６，４７がそれぞれ伝達シャフト４８，４９の軸周り方向に回転せずに、伝達部材４４，４５が第１回転部材１７及び第２回転部材４２と共に回転する。これにより、デフケース１２が歯車機構５と共に回転するので、左車輪１０１及び右車輪１０２は矢印Ｃの方向に回転し、左車輪１０１及び右車輪１０２を駆動輪とする車両は矢印Ｄの方向に直進する。 Next, the operation of the drive wheel drive device 1 according to one embodiment of the present disclosure will be described. The left wheel 101 and the right wheel 102 are driven by driving forces provided by the first motor 2 and the second motor 3. When the first motor 2 is operated and the first output shaft 21 and the first drive pinion gear 22 rotate in the left direction (the direction of the arrow A) in FIG. 1, the first ring gear 11 meshing with the first drive pinion gear 22 rotates in the direction of the arrow B, and the first rotating member 17 to which the first ring gear 11 is fixed also rotates in the direction of the arrow B. At the same time, when the second motor 3 is operated and the second output shaft 31 and the second drive pinion gear 32 rotate in the right direction (the direction of the arrow E) in FIG. 1, the second ring gear 41 meshing with the second drive pinion gear 32 rotates in the direction of the arrow F, and the second rotating member 42 to which the second ring gear 41 is fixed also rotates in the direction of the arrow F. By adjusting the rotation speed of each of the first motor 2 and the second motor 3, the rotation speed of the first rotating member 17 in the direction of arrow B and the rotation speed of the second rotating member 42 in the direction of arrow F become the same, so that the second pinion gears 46, 47 do not rotate in the axial direction of the transmission shafts 48, 49, respectively, and the transmission members 44, 45 rotate together with the first rotating member 17 and the second rotating member 42. As a result, the differential case 12 rotates together with the gear mechanism 5, so that the left wheel 101 and the right wheel 102 rotate in the direction of arrow C, and the vehicle with the left wheel 101 and the right wheel 102 as the drive wheels moves straight in the direction of arrow D.

次に、左車輪１０１及び右車輪１０２を駆動輪とする車両が左方向に旋回する際の駆動輪駆動装置１の動作について説明する。車両が左方向に旋回する場合には、左車輪１０１の回転速度は減少し、右車輪１０２の回転速度は増加する。左車輪１０１及び右車輪１０２の回転速度の関係がこのようになるために、デファレンシャルギア４では、車両が左方向に旋回する際に、左車輪１０１は、路面から左車輪１０１を減速しようとする力を受け、その力を、左車輪１０１とつながるサイドギア１３へ、サイドギア１３が減速する回転方向（矢印Ｉの方向）の力として伝え、サイドギア１３が減速することで、ピニオンギア１５，１６が互いに反対方向、すなわちピニオンギア１５が図１における右方向（矢印Ｇの方向）に回転するとともにピニオンギア１６が図１における左方向（矢印Ｈの方向）に回転する。そして、そのピニオンギア１５とピニオンギア１６とをそのように回転させる力が、サイドギア１４へ、サイドギア１４が加速する回転方向（矢印Ｊの方向）の力として伝わり、サイドギア１４が加速することで、サイドギア１４とつながる右車輪１０２の回転速度が増加する。このようにして、デファレンシャルギア４は、左車輪１０１の回転速度を減少させ、右車輪１０２の回転速度を増加させる関係を作り出すことができる。 Next, the operation of the drive wheel drive device 1 when the vehicle having the left wheel 101 and the right wheel 102 as drive wheels turns leftward will be described. When the vehicle turns to the left, the rotational speed of the left wheel 101 decreases and the rotational speed of the right wheel 102 increases. Because the relationship between the rotational speeds of the left wheel 101 and the right wheel 102 is as described above, in the differential gear 4, when the vehicle turns to the left, the left wheel 101 attempts to decelerate the left wheel 101 from the road surface. Upon receiving the force, the force is transmitted to the side gear 13 connected to the left wheel 101 as a force in the rotational direction (direction of arrow I) in which the side gear 13 decelerates, and as the side gear 13 decelerates, the pinion gears 15 and 16 mutually In the opposite direction, pinion gear 15 rotates to the right in FIG. 1 (in the direction of arrow G), and pinion gear 16 rotates to the left in FIG. 1 (in the direction of arrow H). Then, the force that rotates the pinion gear 15 and pinion gear 16 in this way is transmitted to the side gear 14 as a force in the rotational direction (direction of arrow J) in which the side gear 14 accelerates, and the side gear 14 accelerates. The rotational speed of the right wheel 102 connected to the side gear 14 increases. In this way, the differential gear 4 can create a relationship in which the rotational speed of the left wheel 101 is decreased and the rotational speed of the right wheel 102 is increased.

車両が左方向に旋回する際に、左車輪１０１及び右車輪１０２間に適切なトルク差を付与できれば、車両の旋回性を調整することができる。駆動輪駆動装置１では、第１モータ２及び第２モータ３からの両方の駆動力を、若しくはどちらか一方の駆動力を調整することにより左車輪１０１及び右車輪１０２間のトルク差を調整して、車両の旋回性を調整することができる。 If an appropriate torque difference can be applied between the left wheel 101 and the right wheel 102 when the vehicle turns to the left, the turning performance of the vehicle can be adjusted. In the driving wheel drive device 1, the torque difference between the left wheel 101 and the right wheel 102 is adjusted by adjusting both the driving forces from the first motor 2 and the second motor 3, or the driving force of either one. It is possible to adjust the turning performance of the vehicle.

例えば、車両が左方向に旋回する場合に車両の旋回性をより向上させるためには、第１出力軸２１及び第１ドライブピニオンギア２２の矢印Ａの方向の回転速度が減少するように、また、第２出力軸３１及び第２ドライブピニオンギア３２の矢印Ｅの方向の回転速度が増加するように、第１モータ２及び第２モータ３の両方の駆動力を、若しくはどちらか一方の駆動力を調整する。そうすると、第２回転部材４２の矢印Ｆ方向の回転速度が第１回転部材１７の矢印Ｂ方向の回転速度よりも大きくなるので、第３リングギア１８及び第４リングギア４３と噛み合う第２ピニオンギア４６は、車両が左方向に旋回する際のピニオンギア１５の回転方向Ｇと同じ方向に回転して、ピニオンギア１５がより回転するようになるとともに、第３リングギア１８及び第４リングギア４３と噛み合う第２ピニオンギア４７も、車両が左方向に旋回する際のピニオンギア１６の回転方向Ｈと同じ方向に回転して、ピニオンギア１６がより回転するようになる。第１モータ２及び第２モータ３の両方の駆動力の調整、若しくはどちらか一方の駆動力の調整により、伝達シャフト４８，４９を介して第２ピニオンギア４６，４７の回転がピニオンギア１５，１６に伝達されるので、第１モータ２及び第２モータ３の両方駆動力の調整、若しくはどちらか一方の駆動力の調整に応じたトルク差が左車輪１０１及び右車輪１０２間に付与される。 For example, in order to further improve the turning performance of the vehicle when the vehicle turns to the left, the rotational speed of the first output shaft 21 and the first drive pinion gear 22 in the direction of arrow A may be reduced; , the driving force of both the first motor 2 and the second motor 3, or the driving force of either one, so that the rotational speed of the second output shaft 31 and the second drive pinion gear 32 in the direction of arrow E increases. Adjust. Then, the rotational speed of the second rotating member 42 in the direction of arrow F becomes larger than the rotational speed of the first rotating member 17 in the direction of arrow B, so the second pinion gear meshes with the third ring gear 18 and the fourth ring gear 43. 46 rotates in the same direction as the rotation direction G of the pinion gear 15 when the vehicle turns leftward, so that the pinion gear 15 rotates more, and the third ring gear 18 and the fourth ring gear 43 The second pinion gear 47 that meshes with the second pinion gear 47 also rotates in the same direction as the rotation direction H of the pinion gear 16 when the vehicle turns leftward, so that the pinion gear 16 rotates more. By adjusting the driving force of both the first motor 2 and the second motor 3, or adjusting the driving force of either one, the rotation of the second pinion gears 46, 47 is controlled by the pinion gear 15, 47 via the transmission shafts 48, 49. 16, a torque difference is applied between the left wheel 101 and the right wheel 102 according to the adjustment of the driving force of both the first motor 2 and the second motor 3, or the adjustment of the driving force of either one. .

また、車両が左方向に旋回する場合に、第１モータ２及び第２モータ３の駆動力の調整を上記とは逆にして、第１出力軸２１及び第１ドライブピニオンギア２２の矢印Ａの方向の回転速度が増加するようにすること、並びに第２出力軸３１及び第２ドライブピニオンギア３２の矢印Ｅの方向の回転速度が減少するようにすることの両方の調整、若しくはどちら一方の調整をすることで、左車輪１０１及び右車輪１０２間のトルク差を抑制し、車両の旋回性を抑制することもできる。 Further, when the vehicle turns leftward, the adjustment of the driving force of the first motor 2 and the second motor 3 is reversed to the above, and the arrow A of the first output shaft 21 and the first drive pinion gear 22 is adjusted. Adjustment of both of increasing the rotational speed in the direction of the arrow E and decreasing the rotational speed of the second output shaft 31 and the second drive pinion gear 32 in the direction of the arrow E, or adjusting either one of them. By doing so, the torque difference between the left wheel 101 and the right wheel 102 can be suppressed, and the turning performance of the vehicle can also be suppressed.

尚、車両が右方向に旋回する際のデファレンシャルギア４の動作は、車両が左方向に旋回する際の動作に対してサイドギア１３，１４及びピニオンギア１５，１６それぞれへの作用の回転方向を逆にすればよく、車両が右方向に旋回する際の旋回性をより向上するための動作は、車両が左方向に旋回する際の動作に対して第１モータ２及び第２モータ３の駆動力の調整を逆にすればよい。 The operation of the differential gear 4 when the vehicle turns to the right is such that the direction of rotation of the action on the side gears 13, 14 and pinion gears 15, 16 is reversed from the operation when the vehicle turns to the left. The operation for further improving the turning performance when the vehicle turns to the right is the driving force of the first motor 2 and the second motor 3 relative to the operation when the vehicle turns to the left. You can reverse the adjustment.

また、車両が右方向に旋回する場合に、第１モータ２及び第２モータ３の調整を上記とは逆にして、第１出力軸２１及び第１ドライブピニオンギア２２の矢印Ａの方向の回転速度が減少するようにすること、並びに第２出力軸３１及び第２ドライブピニオンギア３２の矢印Ｅの方向の回転速度が増加するようにすることの両方の調整、若しくはどちら一方の調整をすることで、左車輪１０１及び右車輪１０２間のトルク差を抑制し、車両の旋回性を抑制することもできる。 In addition, when the vehicle turns to the right, the first motor 2 and the second motor 3 are adjusted in the opposite manner to the above, and the first output shaft 21 and the first drive pinion gear 22 are rotated in the direction of the arrow A. Adjusting both the speed to decrease and/or the rotational speed of the second output shaft 31 and the second drive pinion gear 32 in the direction of arrow E to increase. Therefore, the torque difference between the left wheel 101 and the right wheel 102 can be suppressed, and the turning performance of the vehicle can also be suppressed.

このように、車両の旋回時に、第１モータ２又は第２モータ３の少なくとも一方からの駆動力を調整することにより左車輪１０１及び右車輪１０２間のトルク差を調整できるので、車両の旋回性を調整することができる。 In this way, when the vehicle turns, the torque difference between the left wheel 101 and the right wheel 102 can be adjusted by adjusting the driving force from at least one of the first motor 2 and the second motor 3, thereby improving the turning performance of the vehicle. can be adjusted.

図２に示されるように、駆動輪駆動装置１において、第１リングギア１１と第１ドライブピニオンギア２２との組み合わせ、及び第２ドライブピニオンギア３２と第２リングギア４１とをそれぞれ平歯車にしてもよいし、図３及び４に示されるように、いずれか一方の組み合わせを平歯車にし、他方の組み合わせを傘歯車にしてもよい。 As shown in FIG. 2, in the drive wheel drive device 1, the combination of the first ring gear 11 and the first drive pinion gear 22, and the combination of the second drive pinion gear 32 and the second ring gear 41 are respectively spur gears. Alternatively, as shown in FIGS. 3 and 4, one of the combinations may be a spur gear and the other combination may be a bevel gear.

一方で、図１の構成では、第１モータ２及び第２モータ３のそれぞれの回転が車両の進行方向に対して垂直な方向になり、車両の加減速とは無関係になるので、車両のゆれを低減することができる。 On the other hand, in the configuration shown in FIG. 1, the rotations of the first motor 2 and the second motor 3 are perpendicular to the direction of travel of the vehicle and are independent of acceleration and deceleration of the vehicle. can be reduced.

また、図５に示されるように、駆動輪駆動装置１は、第１回転部材１７と第２回転部材４２とを連結してそれらとともに回転可能に構成された連結機構５０を備えてもよい。連結機構５０の構成は特に限定するものではなく、例えば、連結機構５０は、第１回転部材１７と第２回転部材４２のそれぞれの外周面において周方向に設けられた円環板状の被把持部材５１，５２と、被把持部材５１，５２のそれぞれを把持可能な把持部５３，５４を有する把持部材５５とを備えてもよい。 5, the drive wheel drive device 1 may include a coupling mechanism 50 that couples the first rotating member 17 and the second rotating member 42 and is configured to be rotatable therewith. The configuration of the coupling mechanism 50 is not particularly limited, and for example, the coupling mechanism 50 may include annular plate-shaped gripped members 51, 52 provided in the circumferential direction on the outer circumferential surfaces of the first rotating member 17 and the second rotating member 42, respectively, and a gripping member 55 having gripping portions 53, 54 that can grip the gripped members 51, 52, respectively.

連結機構５０がこのような構成を有する場合、把持部５３，５４のそれぞれが被把持部材５１，５２を把持すると、把持部材５５が第１回転部材１７及び第２回転部材４２を連結した状態でそれらが一体となって回転する。そうすると、第１モータ２又は第２モータ３のいずれか一方が故障したときでも、第１モータ２又は第２モータ３の故障していない他方のモータの駆動力のみによって車両を走行させることができるようになる。 When the connecting mechanism 50 has such a configuration, when the gripping parts 53 and 54 respectively grip the gripped members 51 and 52, the gripping member 55 connects the first rotating member 17 and the second rotating member 42. They rotate as one. Then, even if either the first motor 2 or the second motor 3 is out of order, the vehicle can be driven only by the driving force of the other motor that is not out of order. It becomes like this.

上記実施形態では、第１駆動力源及び第２駆動力源はともにモータであったが、いずれか一方がエンジン又は両方がエンジンであってもよい。ただし、第１出力軸２１及び第２出力軸３１それぞれの回転方向の変更は、第１駆動力源及び第２駆動力源がそれぞれモータであれば、各モータへ供給される電流の流れる方向を逆にするだけで実現可能であるが、第１駆動力源及び第２駆動力源がそれぞれエンジンである場合には、ギア等が必要になり構成が複雑になるため、第１駆動力源及び第２駆動力源は両方ともモータであることが好ましい。 In the above embodiment, both the first driving force source and the second driving force source are motors, but either one or both may be engines. However, if the first driving force source and the second driving force source are motors, changing the rotation direction of the first output shaft 21 and the second output shaft 31 changes the direction in which the current supplied to each motor flows. This can be achieved by simply reversing the configuration, but if the first driving power source and the second driving power source are each an engine, gears etc. will be required and the configuration will be complicated. Preferably, both second drive power sources are motors.

１ 駆動輪駆動装置
２ 第１モータ（第１駆動力源）
３ 第２モータ（第２駆動力源）
４ デファレンシャルギア
５ 歯車機構
１１ 第１リングギア
１２ デフケース
１３ サイドギア
１４ サイドギア
１５ ピニオンギア
１６ ピニオンギア
１７ 第１回転部材
１８ 第３リングギア
２１ 第１出力軸
２２ 第１ドライブピニオンギア
３１ 第２出力軸
３２ 第２ドライブピニオンギア
４１ 第２リングギア
４２ 第２回転部材
４３ 第４リングギア
４４ 伝達部材
４５ 伝達部材
４６ 第２ピニオンギア
４７ 第２ピニオンギア
４８ 伝達シャフト
４９ 伝達シャフト
５０ 連結機構
５１ 被把持部材
５２ 被把持部材
５３ 把持部
５４ 把持部
５５ 把持部材
１０１ 左車輪（駆動輪）
１０２ 右車輪（駆動輪） 1 Drive wheel drive device 2 First motor (first drive power source)
3 Second motor (second driving power source)
4 Differential gear 5 Gear mechanism 11 First ring gear 12 Differential case 13 Side gear 14 Side gear 15 Pinion gear 16 Pinion gear 17 First rotating member 18 Third ring gear 21 First output shaft 22 First drive pinion gear 31 Second output shaft 32 Second drive pinion gear 41 Second ring gear 42 Second rotating member 43 Fourth ring gear 44 Transmission member 45 Transmission member 46 Second pinion gear 47 Second pinion gear 48 Transmission shaft 49 Transmission shaft 50 Connection mechanism 51 Gripped member 52 Gripped member 53 Gripping part 54 Gripping part 55 Gripping member 101 Left wheel (drive wheel)
102 Right wheel (drive wheel)

Claims (5)

車両の一対の駆動輪を駆動させる駆動輪駆動装置であって、
前記一対の駆動輪を駆動させるための駆動力を与える第１駆動力源及び第２駆動力源と、
前記第１駆動力源及び前記第２駆動力源のそれぞれからの前記駆動力を前記一対の駆動輪のそれぞれに分配するデファレンシャルギアであって、デフケースと、該デフケース内に収容された一対のサイドギアと、前記デフケース内に収容され前記一対のサイドギアと噛み合うピニオンギアとを備えるデファレンシャルギアと、
前記デフケースの外部に設けられるとともに前記第１駆動力源からの前記駆動力によって回転可能に構成された第１回転部材と、
前記デフケースの外部に設けられるとともに前記第２駆動力源からの前記駆動力によって回転可能に構成された第２回転部材と、
前記第１回転部材及び前記第２回転部材のそれぞれの回転を前記ピニオンギアに伝達する伝達部材と
を備える駆動輪駆動装置。 A drive wheel drive device that drives a pair of drive wheels of a vehicle,
a first driving force source and a second driving force source that provide driving force for driving the pair of drive wheels;
A differential gear that distributes the driving force from each of the first driving force source and the second driving force source to each of the pair of driving wheels, the differential gear comprising a differential case and a pair of side gears housed in the differential case. and a pinion gear that is housed in the differential case and meshes with the pair of side gears;
a first rotating member provided outside the differential case and configured to be rotatable by the driving force from the first driving force source;
a second rotating member provided outside the differential case and configured to be rotatable by the driving force from the second driving force source;
A drive wheel drive device comprising: a transmission member that transmits rotations of the first rotation member and the second rotation member to the pinion gear. 前記第１駆動力源と前記第１回転部材とは、前記第１駆動力源の第１出力軸につながる第１ドライブピニオンギアと、前記第１回転部材に固定された第１リングギアとが噛み合うことで接続され、
前記第２駆動力源と前記第２回転部材とは、前記第２駆動力源の第２出力軸につながる第２ドライブピニオンギアと、前記第２回転部材に固定された第２リングギアとが噛み合うことで接続され、
前記第１ドライブピニオンギアと前記第１リングギアとの組み合わせ、及び、前記第２ドライブピニオンギアと前記第２リングギアとの組み合わせがいずれも傘歯車である、請求項１に記載の駆動輪駆動装置。 The first driving force source and the first rotating member include a first drive pinion gear connected to a first output shaft of the first driving force source, and a first ring gear fixed to the first rotating member. Connected by interlocking,
The second driving force source and the second rotating member include a second drive pinion gear connected to a second output shaft of the second driving force source, and a second ring gear fixed to the second rotating member. Connected by interlocking,
The drive wheel drive according to claim 1, wherein the combination of the first drive pinion gear and the first ring gear and the combination of the second drive pinion gear and the second ring gear are both bevel gears. Device. 前記第１駆動力源と前記第１回転部材とは、前記第１駆動力源の第１出力軸につながる第１ドライブピニオンギアと、前記第１回転部材に固定された第１リングギアとが噛み合うことで接続され、
前記第２駆動力源と前記第２回転部材とは、前記第２駆動力源の第２出力軸につながる第２ドライブピニオンギアと、前記第２回転部材に固定された第２リングギアとが噛み合うことで接続され、
前記第１ドライブピニオンギアと前記第１リングギアとの組み合わせ、及び、前記第２ドライブピニオンギアと前記第２リングギアとの組み合わせがいずれも平歯車である、請求項１に記載の駆動輪駆動装置。 The first driving force source and the first rotating member include a first drive pinion gear connected to a first output shaft of the first driving force source, and a first ring gear fixed to the first rotating member. Connected by interlocking,
The second driving force source and the second rotating member include a second drive pinion gear connected to a second output shaft of the second driving force source, and a second ring gear fixed to the second rotating member. Connected by interlocking,
The drive wheel drive according to claim 1, wherein the combination of the first drive pinion gear and the first ring gear and the combination of the second drive pinion gear and the second ring gear are both spur gears. Device. 前記第１駆動力源と前記第１回転部材とは、前記第１駆動力源の第１出力軸につながる第１ドライブピニオンギアと、前記第１回転部材に固定された第１リングギアとが噛み合うことで接続され、
前記第２駆動力源と前記第２回転部材とは、前記第２駆動力源の第２出力軸につながる第２ドライブピニオンギアと、前記第２回転部材に固定された第２リングギアとが噛み合うことで接続され、
前記第１ドライブピニオンギアと前記第１リングギアとの組み合わせ、及び、前記第２ドライブピニオンギアと前記第２リングギアとの組み合わせのいずれか一方が平歯車で他方が傘歯車である、請求項１に記載の駆動輪駆動装置。 The first driving force source and the first rotating member include a first drive pinion gear connected to a first output shaft of the first driving force source, and a first ring gear fixed to the first rotating member. Connected by interlocking,
The second driving force source and the second rotating member include a second drive pinion gear connected to a second output shaft of the second driving force source, and a second ring gear fixed to the second rotating member. Connected by interlocking,
Claim: One of the combinations of the first drive pinion gear and the first ring gear and the combination of the second drive pinion gear and the second ring gear is a spur gear and the other is a bevel gear. 1. The drive wheel drive device according to 1. 前記第１回転部材と前記第２回転部材とを連結してそれらとともに回転可能に構成された連結機構を備える、請求項１～４のいずれか一項に記載の駆動輪駆動装置。 The drive wheel drive device according to any one of claims 1 to 4, further comprising a connecting mechanism configured to connect the first rotating member and the second rotating member so as to be rotatable therewith.
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Citations (4)

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JP2006125562A (en) 2004-10-29 2006-05-18 Toyota Motor Corp Differential gear for vehicle and vehicle having the same
JP2008283836A (en) 2007-05-14 2008-11-20 Toyota Motor Corp Vehicle
JP2017005958A (en) 2015-06-16 2017-01-05 三菱自動車工業株式会社 Electric-vehicular drive force control apparatus
JP2020020422A (en) 2018-08-02 2020-02-06 株式会社豊田中央研究所 Drive mechanism

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006125562A (en) 2004-10-29 2006-05-18 Toyota Motor Corp Differential gear for vehicle and vehicle having the same
JP2008283836A (en) 2007-05-14 2008-11-20 Toyota Motor Corp Vehicle
JP2017005958A (en) 2015-06-16 2017-01-05 三菱自動車工業株式会社 Electric-vehicular drive force control apparatus
JP2020020422A (en) 2018-08-02 2020-02-06 株式会社豊田中央研究所 Drive mechanism

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