JP2012148683A - Electric motor drive device for hybrid vehicle, and hybrid vehicle with the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hybrid vehicle allowing an output of an electric motor to favorably act as a drive force without any accompanying alteration to a power transmission system of a vehicle such as an existing motorcycle in spite of being constituted to be simple, inexpensive, lightweight and compact in size.SOLUTION: In the hybrid vehicle 1 provided with an internal combustion engine 2 and an electric motor 20 as power sources, an electric motor drive device 10 for providing a driving force to a wheel 11 by means of the electric motor 20 is rotatable around a rotary shaft approximately parallel to an axle of the wheel 11, and includes a drive roller 15 abutting on the vicinity of an outer periphery of at least one wheel 11, and an electric motor 20 for driving the drive roller 15.

Description

  The present invention relates to an electric motor drive device for a hybrid vehicle used for driving a hybrid vehicle such as a bicycle with a prime mover, a motorcycle, a tricycle, or the like that includes an internal combustion engine and an electric motor as power sources, and a hybrid vehicle including the device. .

Conventionally, as a power source for vehicles such as motorcycles and tricycles, an internal combustion engine (engine) that combusts fuel and extracts output is mainly used.
However, in recent years, compared with an internal combustion engine, running costs are not required, maintenance is easy, and the cost is low. In addition, noise and vibration are low, quietness is excellent, and harmful exhaust gas is discharged. Therefore, electric motors have been attracting attention and put into practical use as a power source friendly to the global environment that does not increase air pollution and global warming.

  For this reason, a so-called hybrid vehicle has been proposed that includes an internal combustion engine and an electric motor as power sources and operates the internal combustion engine and the electric motor at the same time, or operates either of them.

  As an example of a hybrid vehicle, for example, Patent Document 1 is configured such that an output of an electric motor acts on an output shaft of an internal combustion engine via a planetary gear mechanism.

  In Patent Document 2, the internal combustion engine and the electric motor are rotated through a silent chain wound around a sprocket connected to the output shaft of the internal combustion engine and a sprocket connected to the output shaft of the electric motor. A hybrid vehicle adapted to be coupled is described.

JP 2000-337981 A JP 2007-269253 A

  However, the hybrid vehicle described in Patent Document 1 and Patent Document 2 requires a complicated mechanism for causing the output of the electric motor to act on the output shaft of the internal combustion engine, and greatly improves the structure of the power transmission system. In addition to the need for major changes, there are many restrictions on the installation location of the electric motor to operate the electric motor on the output shaft of the internal combustion engine, and there are significant changes in the design, such as the need to change the mounting layout. Or production system changes, etc., and it may be difficult to reduce costs.

  In addition, since the contents described in Patent Document 1 and Patent Document 2 require a significant change in the structure and mounting layout of the power transmission system, such as a motorcycle such as a motorcycle mounted only with an existing internal combustion engine. On the other hand, there is no idea of providing a simple hybrid vehicle by allowing an electric motor to be mounted later, and the fact is that no consideration is given to such a simple hybrid vehicle.

  The present invention has been made in view of such circumstances, and has a simple, inexpensive, lightweight and compact configuration, and it is possible to satisfactorily perform an electric motor without changing the power transmission system of a vehicle such as an existing motorcycle. An object of the present invention is to provide an electric motor drive device for a hybrid vehicle in which an output can act as a driving force, and a hybrid vehicle including the device.

The hybrid vehicle according to the present invention is
A hybrid vehicle comprising an internal combustion engine and an electric motor as power sources,
An electric motor driving device that applies driving force to the wheels by an electric motor,
A drive roller configured to be rotatable about a rotation axis substantially parallel to the wheel axle, and in contact with an outer periphery of at least one wheel;
An electric motor for driving the drive roller;
It is characterized by including.

  In the present invention, a plurality of drive rollers may be provided in the circumferential direction of the wheel.

  In the present invention, two drive rollers may be disposed in the circumferential direction of the wheel with respect to the common bracket.

  In the present invention, the electric motor may be a pair of electric motors that drive the drive roller from both sides of the rotation shaft across the drive roller.

  The electric motor drive device for a hybrid vehicle according to the present invention is used for the hybrid vehicle according to the present invention described above.

  According to the present invention, the output of an electric motor can be satisfactorily acted as a driving force without any change to the power transmission system of a vehicle such as an existing motorcycle, though it is a simple, inexpensive, lightweight and compact configuration. It is possible to provide an electric motor drive device for a hybrid vehicle and a hybrid vehicle including the device.

1 is a side view showing an overall configuration of a hybrid vehicle including an electric motor drive device according to an embodiment of the present invention. (A) is an enlarged side view schematically showing the electric motor drive device (rear wheel portion) according to the embodiment described above, and (B) is an electric motor drive device (rear wheel) having a plurality of rows of drive rollers. (C) is a side view schematically showing an example of an electric motor drive device (rear wheel portion) provided with a plurality of rows of drive rollers and electric motors. It is the figure which showed the example of a connection of the drive roller and electric motor periphery which concerns on embodiment same as the above. It is the figure which showed the contact part form of the drive roller which contact | abuts the wheel which concerns on embodiment same as the above. It is the perspective view which showed the actual mounting example (example at the time of providing a driving roller and an electric motor 2 rows in a wheel circumferential direction) of the electric motor drive device (rear-wheel part) which concerns on embodiment same as the above.

  Hereinafter, an embodiment of a hybrid vehicle drive device and a hybrid vehicle according to the present invention will be described with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.

  As shown in FIG. 1, a hybrid vehicle 1 equipped with a hybrid vehicle drive device according to the present embodiment is based on a motorcycle (such as a bicycle with a motor, a motorcycle, etc.) equipped with an internal combustion engine 2. There is provided a rear wheel electric motor drive mechanism 10 for applying power to the vicinity of the outer periphery (which is a concept including a side surface near the outermost periphery).

  In the present embodiment, the motorcycle of the straddle type is illustrated, but the present invention is not limited to this, and is applicable to a scooter type, a tricycle, a four-wheeled vehicle, etc. (buggy, cart, etc.) Is possible.

  As shown in FIG. 1, in the hybrid vehicle 1, the output of the internal combustion engine 2 is transmitted to the rear wheel 11 via a power transmission mechanism 3 including a sprocket and a chain.

  The rear wheel 11 is suspended from the vehicle frame by a suspension device 14 including a swing arm 12, a spring, a damper, and the like.

  Here, in the hybrid vehicle 1 according to the present embodiment, the internal combustion engine 2, the power transmission mechanism 3, the swing arm 12, and the suspension device 14 can use the conventional two-wheeled vehicle structure as it is.

The front wheel 101 is attached via a suspension device 5 to a handle 4 that is rotatably attached to a vehicle frame.
In the hybrid vehicle 1 according to the present embodiment, the structure of the conventional motorcycle can be used as it is for the handle 4 and the suspension device 5 as well.

  FIG. 1 shows a case where a front-wheel electric motor drive mechanism 100 that applies power to the vicinity of the outer periphery of the front wheel 101 (which is a concept including the side surface near the outermost periphery) is provided. However, one of the rear wheel electric motor drive mechanism 10 or the front wheel electric motor drive mechanism 100 may be omitted.

  Here, as schematically shown in FIG. 2, for example, the rear wheel electric motor drive device 10 (or front wheel electric motor drive device 101) acting on the rear wheel 11 (or front wheel 101) is a rear wheel. 11 (or the front wheel 101) is a drive that abuts with a predetermined pressing force near the outer periphery of the front wheel 101 (including the side surface near the outermost periphery) and transmits the rotational power to the rear wheel 11 (or the front wheel 101) by the friction force. The roller 15 (or drive roller 105) is included.

  In addition, as shown to FIG. 2 (A), although it can also be set as the structure provided with one drive roller 15 (105) and the electric motor 20 (120) with respect to the rear wheel 11 (front wheel 101), FIG. As shown in B), a plurality of rows of drive rollers 15 (105) are arranged in the circumferential direction of the rear wheel 11 (front wheel 101), and these are driven by a single electric motor 20 (120) to drive force. Can be configured to enhance. Further, as shown in FIG. 2C, a plurality of rows of drive rollers 15 (105) and electric motors 20 (120) are arranged in the circumferential direction of the rear wheel 11 (front wheel 101) so as to increase the driving force. Can be configured.

  2B and 2C, two drive rollers 15 (105) are arranged in the circumferential direction of the rear wheel 11 (front wheel 101), but two are arranged in the circumferential direction. Thus, the length of each straight line connecting the rotation center of each drive roller 15 and the rotation center of the rear wheel 11 (front wheel 101) can be made equal (the rotation center of each drive roller 15 and the rear wheel 11 (front wheel 11). 101) is the apex of an isosceles triangle), so that even the single common bracket 13 can easily abut the outer periphery of the rear wheel 11 (front wheel 101) of the two drive rollers 15. There is an advantage that the degree can be equalized.

  When three or more X drive rollers 15 are arranged in the circumferential direction of the rear wheel 11 (front wheel 101) with respect to the common bracket 13, the (X-2) drive rollers Providing a configuration capable of adjusting the position of the rear wheel 11 (front wheel 101) in the radial direction makes it possible to equalize the degree of contact between the plurality of drive rollers 15 near the outer periphery of the rear wheel 11 (front wheel 101). preferable.

  By the way, a plurality of units in which two drive rollers 15 are disposed in the circumferential direction of the rear wheel 11 (front wheel 101) on the common bracket 13 can be disposed in the circumferential direction of the rear wheel 11 (front wheel 101). .

  Here, in the case where the air has escaped more than a predetermined amount and the driving safety is reduced, the drive roller is used until the air is replenished to a predetermined degree in order to urge the driver to replenish the air. The position of the driving roller 15 (105) and the elastic biasing force can be set so that the power of 15 is not transmitted to the outer periphery of the rear wheel 11 (front wheel 101), thereby improving safety. is there.

  As shown in FIG. 3, the electric motor 20 is rotationally connected to the drive roller 15 constituting the rear wheel electric motor drive device 10 from both sides of the vehicle central axis X (from the facing direction parallel to the wheel rotation central axis). The drive roller 15 is rotationally driven by the electric motor 20. The drive roller 105 constituting the front wheel electric motor drive device 100 can have the same configuration.

  As shown in FIG. 1, the rear wheel electric motor drive device 10 (or the front wheel electric motor drive device 100) is attached to a bracket (rod-shaped bracket in FIG. 1) 13 that is substantially integrally fixed to the wheel rotation center shaft. The rear wheel 10 (or the front wheel 101) is supported while being elastically biased via a spring or the like.

  The electric motor 20 (120) of the rear wheel electric motor drive device 10 (or the front wheel electric motor drive device 100) is moved to the electric motor 20 by a driver operating a switch provided near the grip of the handle 4. The amount of current flowing is controlled, and the vehicle is driven at an output that matches the driver's intention.

  Therefore, when the driver wants to drive the rear wheel electric motor drive device 10 (and / or the front wheel electric motor drive device 100), for example, the switch attached near the grip of the handle 4 is pushed down with a finger or the like. Thus, the electric motor 20 (120) is energized during the push-down period, and driving by the rear wheel electric motor drive device 10 (and / or the front wheel electric motor drive device 100) is performed. Yes.

In addition, when responding to a request to change the driving force by the rear wheel electric motor driving device 10 (and / or the front wheel electric motor driving device 100), a slide switch (variable resistance switch) capable of increasing the amount of current flow. ) And the like, and the amount of electric power supplied to the electric motor 20 (120) is controlled by operating the slide amount (resistance value) to drive the rear wheel electric motor drive device 10 (and / or the front wheel electric motor drive). It is also possible to change the driving force by the device 100).
In this case, a slide switch with a spring that returns to the original position (energization stop) when the driver releases his / her finger can be employed.

  Further, for example, when driving by the rear wheel electric motor driving device 10 (and / or the front wheel electric motor driving device 100) is desired to reduce the output of the internal combustion engine 2 at the same time, the driver may The accelerator (the amount of rotation of the grip) is loosened to increase the drive load ratio by the rear wheel electric motor drive device 10 (and / or the front wheel electric motor drive device 100), thereby reducing the drive load of the internal combustion engine 2. Thus, it is possible to realize a driving mode in accordance with the driver's request, such as suppressing fuel consumption.

  In the present embodiment, the switch for operating the electric motor 20 (120) can be a stepping type switch. In the case of a straddling type, the inside of the knee is used. An operation type can be adopted, and it is preferable to automatically return to the original position (energization stop position) by a spring or the like when the switch is released.

  In FIG. 1, the battery 200 for driving the electric motor 20 (120) is illustrated as a configuration that is mounted separately from the normal battery in order to ensure the amount of current supplied to the electric motor 20 (120). The battery 200 can be omitted by increasing the capacity of the mounted battery.

  Here, FIG. 5 shows the hybrid vehicle 1 in which the rear wheel electric motor drive device 10 is actually mounted. Note that the mounting example shown in FIG. 5 is an example in which the drive roller 15 and the electric motor 20 are provided in two rows in the circumferential direction of the rear wheel 11.

  Here, when the drive roller is supported like a cantilever, the cantilever support portion of the transmission member bends due to the reaction force during driving, etc., making it impossible to transmit power efficiently and the straight running stability deteriorates. Furthermore, there is a risk that an excessive force acts on the bearing that rotatably supports the transmission member, resulting in noise and wear. In addition, the direct feeling that the driving force is directly transmitted to the wheels is weakened, which may give the driver a sense of incongruity.

  For this reason, in this embodiment, as shown in FIGS. 3 and 4, the drive roller 15 (105) is supported from both sides like a doubly supported beam. However, also in this embodiment, the drive roller 15 (105) may be configured to be supported like a cantilever.

  Furthermore, in the present embodiment, when driving is performed, adverse effects such as twisting of the shaft portion of the drive roller 15 (105), or an unreasonable effect on a bearing or the like that supports the drive roller 15 (105) are impossible. Electric motors 20 (120) are arranged on both sides of the drive roller 15 (105) so that the generation of force can be suppressed and the drive force can be efficiently transmitted to the rear wheel 11 (front wheel 101). The drive roller 15 (105) can be driven with the same force from both sides.

  Note that when the transmission member is driven from one side in the width direction of the rear wheel, although it is asymmetrical in the left and right directions, the straight traveling performance is poor, but the width direction of the rear wheel 11 (front wheel 101) as in the present embodiment. By arranging the electric motor 20 (120) symmetrically across the center line (vehicle center axis X) and driving the drive roller 15 (105) from both sides, the generation of asymmetrical torsion is suppressed. Therefore, the driving force can be smoothly and efficiently transmitted to the rear wheels 11 (front wheels 101) symmetrically, so that traveling performance such as straight traveling performance can be improved and safety can be improved. Furthermore, since a feeling of rigidity and direct feeling can be enhanced, a good impression can be given to the driver.

  In addition, since the relatively heavy electric motor 20 (120) is disposed on both sides of the vehicle center axis X, it is easy to achieve a balance, so that traveling stability can be improved.

  When electric motors 20 (120) having relatively small capacities are arranged on both sides of the vehicle center axis X as in the present embodiment, one electric motor having a double capacity (output) is provided on one side. Compared to the case, it is advantageous in that the running stability can be improved while keeping the cost of the electric motor low.

  That is, for example, it is conceivable to provide one electric motor of double capacity (output) on one side and to dispose a heavy object (dummy) of the same weight on the opposite side in order to eliminate the left-right balance. However, large-capacity electric motors tend to be costly, and the weight of the vehicle is increased more than necessary due to the loading of heavy objects with a dummy. There is a possibility that the charging cycle is shortened or the replacement cycle of the battery (rechargeable battery) is shortened.

  Further, if the small-capacity electric motor 20 (120) is arranged symmetrically with respect to the vehicle center axis X as in the present embodiment, as described above, the generation of asymmetrical torsion is suppressed. Therefore, the driving force can be smoothly and efficiently transmitted to the rear wheels 11 (front wheels 101) in a symmetrical manner, so that traveling performance such as straight travel can be improved, safety can be improved, It can give a good impression to the driver because it can enhance the sense of rigidity and directness, but this merit is that one electric motor of double capacity is provided on one side and the same weight on the other side. It cannot be expected when a heavy object (dummy) is arranged.

  Here, the connection between the rotation output shaft 21 of the pair of electric motors 20 disposed on both sides in the width direction of the rear wheel 11 and the drive roller 15 is exemplified in FIGS. 3A to 3E, for example. Such a format can be adopted according to various purposes and requirements. The same applies to the front wheel 101.

  In FIG. 3A, the rotation output shaft 21 of the electric motor 20 is attached to a driving roller 15 (which may be made of metal such as aluminum) which is an elastic body made of a resin such as plastic, rubber, silicon, or urethane. An example is shown. The elasticity of the drive roller 15 can absorb the misalignment between the rotating output shafts 21 of the electric motor 20 facing each other, so the need for precise assembly and the like can be eliminated, and the cost of the product can be reduced. be able to.

  FIG. 3B shows a case where a hard (metal or resin) hollow cylindrical shaft element 22 is attached to the rotation center of a driving roller 15 which is an elastic body made of a resin such as plastic, rubber, silicon, and urethane. Thus, the rotary output shaft 21 of the electric motor 20 is inserted into the hollow portion 22A of the cylindrical shaft element 22 from both sides and joined so as to be slidable in the axial direction. By such axially slidable joining, even if there is a deviation in the axial position between the rotating output shafts 21 of the electric motor 20 facing each other, it is possible to absorb this, so that precise assembly is necessary. Therefore, the cost of the product can be reduced.

  FIG. 3C shows a concave portion (or a convex element) 23 provided on the side surface of the driving roller 15 which is an elastic body made of a resin such as plastic, rubber, silicon, urethane, and the like. A convex element (or a concave portion) 24 that engages with a predetermined gap is formed on the rotation output shaft 21 side of the electric motor 20, and these are engaged so that the drive roller 15 and the rotation output shaft 21 of the electric motor 20 are engaged. And are connected in rotation. By such rotational connection, even if there is a circumferential positional deviation (core deviation) or an axial positional deviation between the driving roller 15 and the rotational output shaft 21 of the electric motor 20, these are effectively prevented. Since it can be absorbed, the need for precise assembly and the like can be eliminated, and the cost of the product can be reduced.

  FIG. 3D shows a connection form in which FIG. 3A and FIG. 3C are combined one by one. In this way, the drive roller 15 and the rotation output shaft 21 of the electric motor 20 There is an advantage that even if there is a positional deviation (core deviation) in the circumferential direction or a positional deviation in the axial direction, the cost can be further reduced while effectively absorbing these.

  FIG. 3E shows a configuration in which the driving roller 15 is divided into two with the wheel center axis X interposed therebetween. A concave portion (or convex element) similar to that shown in FIG. 3C or the like is provided between the facing drive rollers 15A and 15B, and these can be engaged and rotationally connected.

  As shown in FIG. 3E, for example, the driving rollers 15A and 15B are elastically biased via a spring or the like in a direction in which the driving rollers 15A and 15B approach each other, so that the driving rollers 15A and 15B are slightly applied to the rear wheel 11. Even if wear or air pressure changes occur, or the center of the wheel in the width direction and the width of the drive roller are slightly offset (eccentric), they can be absorbed and satisfactorily contacted. By performing a function such as alignment, power can be transmitted efficiently.

  Here, as the electric motor 20 (120) employed in the present embodiment, a DC battery mounted on a vehicle is used as a power source, and therefore a brushed DC motor (permanent magnet field type) that is simple in configuration and easy to drive control. A commutator motor), a brushless DC motor (non-commutator motor), or the like can be employed.

  Here, the brushed DC motor needs to be replaced due to the life of the brush (commutator). However, compared to maintenance such as oil replacement and spark plug replacement in an internal combustion engine or the like, brush replacement is easier. And it doesn't cost much, so it's not a big problem. Since the DC motor with a brush is superior in the cost of the electric motor body, it is preferable to use a DC motor with a brush (permanent magnet field commutator motor) in the drive device according to the present embodiment.

Of the DC motors with brushes, a coreless DC motor without an iron core is suitable as the electric motor 20 of the driving apparatus 10 according to the present embodiment.
Since the coreless DC motor has no iron core in the rotating part, it has low inertia and high response, and contributes to weight reduction. In particular, when the DC print motor has the same capacity (output), the width in the longitudinal direction of the rotating shaft can be greatly shortened. For example, when the mounting width of the electric motor 20 is limited in the width direction of the vehicle 1. In DC, a DC print motor is beneficial.

  In a print motor, a conductive part corresponding to an armature winding is formed on a disk made of glass or ceramics by a printing technique, and this also serves as a commutator. As the DC print motor, for example, a print motor series manufactured by Fujii Precision Co., Ltd. (reference URL: http://www.few.co.jp/html/products.html or http: //www.few. co.jp/pdf/printmotor.pdf).

  As described above, according to the hybrid vehicle 1 according to the present embodiment, while using the internal combustion engine 2, the power transmission path 3, the suspension device 14, the handle 4, the suspension device 5, and the like as before, Since the rear wheel electric motor driving device 10 (and / or the front wheel electric motor driving device 100) acting near the outer periphery of the wheel 11 (and / or the front wheel 101) is provided, a simple, inexpensive, light and compact configuration is provided. However, there is provided a drive device for a hybrid vehicle capable of satisfactorily causing the output of the electric motor to act as a drive force without any change to the power transmission system of a vehicle such as an existing motorcycle, and the drive device. A hybrid vehicle can be provided.

  Further, according to the rear wheel electric motor drive device 10 (or the front wheel electric motor drive device 100) according to the present embodiment, the drive roller 15 (105) contacting the vicinity of the outer periphery of the rear wheel 11 (front wheel 101) is provided. Since the pair of electric motors 20 (120) are configured to be driven from both sides of the rotating shaft with the drive roller 15 (105) interposed therebetween, it is possible to eliminate a long power transmission path with a simple and inexpensive configuration. In addition, it is possible to maintain high running stability and running performance as compared with the conventional drive device, and it is possible to promote downsizing, weight reduction, noise reduction, cost reduction, and the like.

  By the way, in this embodiment, the driving roller 15 (or 105) is brought into contact with the vicinity of the outer periphery of the rear wheel 11 (or front wheel 101) with a predetermined pressing force so that the driving force is applied to the rear wheel 11 (or front wheel 101). However, in the case of a two-wheeled vehicle or the like, the cross-sectional shape of the wheel is an arc shape that is convex outward in view of the fact that the vehicle body is tilted and bent. For this reason, the method shown in FIGS. 4 (A) to 4 (C) is assumed as a method of abutting (contacting), and for example, the contact area is increased as required. Thus, the transmission of the driving force can be improved.

  As another way of contact (contact), as shown in FIG. 4D to FIG. 4E, for example, the contact area is reduced and the contact surface pressure is increased as required. It is also possible to improve the transmission of the driving force.

  Although the hybrid vehicle 1 according to the present embodiment has been described as a two-wheeled vehicle (a bicycle with a motor, a motorcycle, etc.), the present invention is not limited to this, and a tricycle, a four-wheeled vehicle, etc. (a buggy, a cart, etc.) It is also applicable to. Moreover, the wheel with which the electric motor drive device 10 (100) is provided can be a part or all of the wheels provided in the vehicle.

  In the present embodiment, the pair of electric motors 20 (120) has been described by exemplifying the case where the same motors are faced to each other. However, the present invention is not limited to this. For example, electric motors of different types and specifications may be used. It is also possible to make a pair of electric motors facing each other.

  Further, in the present embodiment, in FIGS. 3 and 4, the center in the width direction of the drive roller 15 (105) and the center in the width direction of the rear wheel 11 (front wheel 101) that abuts substantially coincide with each other. Although described by way of example, the present invention is not limited to this, and it is also possible to arrange them by offsetting them according to various circumstances such as layout restrictions.

  Incidentally, in the present embodiment, the electric motor 20 (120) is rotationally connected to the drive roller 15 (105) from both sides of the vehicle central axis X (from the facing direction parallel to the wheel rotation central axis). The configuration is not limited to this, and one side is supported by a bearing or the like, while the other side is provided with an electric motor 20 (120), and the drive roller 15 is rotationally driven by the electric motor 20 (120) provided only on one side. It can also be.

  The present invention is not limited to the embodiments of the invention described above, and various modifications can be made without departing from the gist of the present invention.

1 Hybrid vehicles (two wheels, three wheels, four wheels, etc.)
2 Internal combustion engine
3 Power transmission mechanism 4 Handle 5 Suspension device (For front wheels: Coil spring and damper)
DESCRIPTION OF SYMBOLS 10 Rear wheel electric motor drive device 11 Rear wheel 12 Swing arm 13 Bracket 14 Suspension device (for rear wheel: coil spring and damper)
DESCRIPTION OF SYMBOLS 15 Drive roller 20 Electric motor 100 Electric motor drive device for front wheels 101 Front wheel 105 Drive roller 120 Electric motor

Claims (5)

A hybrid vehicle comprising an internal combustion engine and an electric motor as power sources,
An electric motor driving device that applies driving force to the wheels by an electric motor,
A drive roller configured to be rotatable about a rotation axis substantially parallel to the wheel axle, and in contact with an outer periphery of at least one wheel;
An electric motor for driving the drive roller;
A hybrid vehicle comprising:   The hybrid vehicle according to claim 1, wherein a plurality of drive rollers are provided in a circumferential direction of the wheel.   The hybrid vehicle according to claim 1, wherein two drive rollers are disposed in a circumferential direction of the wheel with respect to a common bracket.   4. The hybrid vehicle according to claim 1, wherein the electric motor is a pair of electric motors that drive the driving roller from both sides of the rotation shaft across the driving roller. 5. .   The electric motor drive device for hybrid vehicles used for the hybrid vehicle as described in any one of Claims 1-4.