JPS6095238A - Driving device for vehicle - Google Patents

Abstract

PURPOSE:To improve energy consumption efficiency and to facilitate controlling the running speed of a vehicle by coupling a comparatively small-sized engine and an electric motor to a planetary gear device to rotate a driving wheel. CONSTITUTION:The driving force of a small-sized engine 1 is transmitted to the first input shaft 8 fixed to a sun gear 4 of a planetary gear device 3 through a speed reducing device 2. A motor shaft 12 of an electric motor 11 is connected directly to the second input shaft 10 fixed to an internal gear 13 of the planetary gear 3. A support frame 17 for the planetary gear 3 is integral with a drive shaft 18 to which a driving wheel 7 is fixed. Low-speed running of a vehicle is performed by using the electric motor as a driving source, and when the driving force of the electric motor 11 is insufficient, the engine is driven at a specified revolutional number.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device that has good energy consumption efficiency and allows easy control of the traveling speed of a vehicle.

Generally, an engine or an electric motor is used alone as a drive source for a vehicle such as an automobile.

For vehicles equipped with an engine, regardless of whether it is a gasoline engine or a diesel engine, there is an engine rotation speed with good fuel consumption efficiency and exhaust gas, and when the vehicle is stopped, it is usually in an idling state. In addition to supplying power necessary for maintaining various electrical components, it also wastes consumed solvent.

In addition, as vehicles equipped with electric motors are busy, it takes a long time to charge a battery (5T), but the distance it can travel on a single charge is short, making it easy to use for general vehicles alone! Hi, Ijllll
There is a problem with Jlii.

In view of such conventional problems, the present invention uses a relatively small engine and an electric motor together as a drive source for a vehicle,
Energy consumption efficiency is improved by inputting engine driving force at a constant rotation speed to the sun gear of the planetary gear system, and by directly connecting an electric motor to the internal gear, and making the rotation of the support frame of the planetary gear the rotation of the drive wheel. To provide a jJj rjJJ device with good performance and easy control of vehicle running speed.

The present invention will be described below with reference to illustrated embodiments.

In the figure, the symbol l indicates a relatively small engine;
When the vehicle is temporarily stopped or when the driving force of the electric motor is insufficient, which will be described later, it is driven at a predetermined rotational speed that is advantageous from the standpoint of fuel consumption efficiency and exhaust gas, and the driving force is transmitted to the planetary gear system 3 through the speed reducer 2. This is input to gear 4. The speed reduction device 2 is a belt transmission device in which a belt 25 is hung between an inzottozoli 5 on the engine 1 side and a drive pulley 6, and a drive device (to be described later) supported by the engine 1 on the vehicle body side and a suspension device on the vehicle body side. It is designed to absorb the relative displacement caused by the vehicle's bumps and bumps.

The left and right sides of the drive pulley 6 are configured symmetrically as drive devices that rotationally drive the left and right drive wheels 7, respectively.

A sun gear 4 is fixed to the other end of the first driver shaft 8 fixed to the drive pulley 6, and bearings 9a and 9b are interposed on the outside 1 of the first driver shaft 8 to provide a second driver shaft. IO is supported relatively rotatably, and one end of the second human power shaft 10 is directly connected to a motor shaft 12 of a DC electric motor 11. The other end of the second human power shaft 10 is fixed to an internal gear 13 of the planetary gear device 3.

Reference numeral 14 is a planetary gear in order to mesh with the internal gear 13 and the sun gear 4. A small shaft 16 rotatably supported via a bearing 15 is fixed to a support frame 17. , drive shaft ] 8 are made into the same body. A drive wheel 7 is attached to the drive shaft 18, and the drive wheel 7 has a built-in braking device 19, such as a known drum brake or disc brake. 20);l: A housing which freely supports the planetary gear set 3 by bearings 21 and 22, and also fixes the excitation coil of the electric motor 11 and is attached to the vehicle body via a suspension device (not shown). ing.

The electric motor 11 is usually a DC electric motor because it has a large starting torque and is required to adjust the speed over a wide range.The electric motor 11 is usually a DC electric motor because it has a large starting torque and is required to adjust the speed over a wide range. , when rotating in reverse? It operates as a generator to charge the battery, and also functions as a starter motor when starting the engine 1.

Note that the electric motor 11 may be a thyristor motor since it can drive the left and right drive wheels 7 synchronously. 23 is a wet braking device that controls the rotation speed of the electric motor 11, and 24 is a braking device that controls the engine 10 rotation speed, and various braking devices such as an external contraction type brake can be applied.

Reference numeral 26 denotes an oil passage for lubricating the planetary gear device 3, and an oil passage 26b for the first human power shaft 8 is provided via a rotary sliding joint 26a, and a branch oil passage 26c at the tip thereof.
The outer end of the housing 20 is opened to the teeth of the sun gear 4, and the bottom opening 20a of the housing 20 and the rotary joint 26a are connected to each other.
are connected by a pipe 26d through an oil cooler and an oil filter (in some cases, a small oil pump), and the lubricating oil is naturally supplied by using the rotational movement of the sun gear 4.
4341. 28 is the electric motor 11
This is a heat dissipation fin for cooling.

Next, the operation will be explained.

When the vehicle is temporarily stopped, the electric motor 11 is rotated in the opposite direction to that when the vehicle is running and is used as a starter motor to start the engine 1, which is driven to rotate at a rotational speed with good fuel consumption efficiency and exhaust gas. The driving force is decelerated by a reduction gear device 2 without passing through a flange or a gear transmission, and is input to the sun gear 4 via the first human power shaft 8. In this case, the drive shaft 18 is kept in a non-rotating state by operating the brake device 9, and the driving force of the engine 1 is transferred from the sun gear 4 to the planetary gear 1.
Through step 4, the internal gear 13 is decelerated and the electric motor 11 is rotated in the opposite direction to that during running, so that the cloth motor 11 acts as a generator to efficiently charge the non-illustrated battery. It becomes.

At the time of starting, the engine 1 is stopped, the brake device 19 of the drive wheels 7 is released, and the brake device 24 is activated to suppress reverse rotation of the engine 1 and transfer the driving force of the electric motor 11 to the internal gear 13 and the planetary gear. The signal is transmitted to the support frame 17 via the gear 14, and input to the drive shaft 18 to rotationally drive the drive wheel 7. The rotation speed of the electric motor 110 is controlled, for example, by variable control of the current of the excitation coil or the armature voltage (current) according to the amount of depression of an accelerator pedal (not shown).
The armature voltage (current) may be controlled by Chompa control, or the field current may be controlled.

Furthermore, when the electric motor 11 alone is still insufficient in driving force, such as when the electric motor 11 is running uphill while temporarily increasing the running speed, the engine 1 can be driven at high speed to temporarily obtain high output. . Therefore, the electric motor 11. The output of the engine 1 allows the use of a relatively small engine.

When decelerating or stopping, the braking device 19 is activated to brake the drive wheels 7. At this time, electric braking by the electric motor 111C can also be used for charging.

Further, when the engine brake is applied in a normal gasoline engine vehicle when stepping down, the brake system #119 is activated or electric braking is performed by the electric motor 11.

By the way, when the vehicle is temporarily stopped, the braking device 19 for the driving wheels 7
The operation of braking the engine 1 and driving the engine 1 to rotate, the operation of stopping the engine 1 at the time of starting and operating the braking device 24 of the engine 1, and the operation of driving the engine 1 at a predetermined rotation speed when the drive torque of the electric motor 11 is insufficient. The operation of adjusting the rotation speed of the electric motor IJ, stopping the engine l during deceleration, and controlling the safety by the braking device 19 or the electric motor 11! Each operation, such as the operation of selecting JIJI, is performed by a microcomputer (not shown) calculating optimal conditions.

In addition, when this vehicle drive system is applied to the rear wheels of a two-wheel drive vehicle, the turning operation of the vehicle is performed by applying the braking device 23 on the same side in the turning direction or by changing the input voltage or field current to the armature. This is done by adjusting the rotational speed of the left and right drive wheels 7. Therefore, differential gearing in general vehicles is unnecessary.

There is only one engine! It is also possible to use a four-wheel drive vehicle in which both the front and rear wheels are driven by the drive unit according to the present invention. In this case, if the housing 20 is supported on the vehicle body side so as to be swingable in the front direction of the vehicle body and the rotational speed of each drive wheel 7 is controlled, the difference between the inner wheels can be made zero.

As explained above, in the present invention, the second human power shaft fixed to the internal gear of the planetary gear train is directly connected to the motor shaft of the electric motor, and the first input shaft fixed to the sun gear is connected to the second human power shaft. This is a vehicle drive system in which the support frame of the planetary gear is connected to the drive shaft to which the drive wheel is attached, together with the stone connected to the engine driven at a predetermined rotation speed via a reduction gear. did.

Therefore, the following effects can be obtained.

Since the engine can be rotated by an electric motor, a starter motor is not required. In addition, the electric motor is used as the drive source to drive the vehicle at low speeds, and when the electric motor lacks driving force, the engine is driven at a constant rotation speed.
The engine can be made significantly smaller. Since the engine functions to charge the battery at least temporarily when the vehicle is stopped, there is little energy loss and is useful for energy conservation, and the electric vehicle is freed from frequent and long-time charging procedures.

Furthermore, since the left and right drive wheels can be easily controlled individually, no differential gearing is required, and since continuously variable speeds can be easily performed, modification devices such as clutches and speed change gears are, in principle, unnecessary. As long as the battery is in a charged state, it is possible to drive regardless of the amount of fuel remaining, and as long as there is fuel, the vehicle can be driven even if the battery is completely discharged. Furthermore, since a planetary gear system is used as a speed reduction means for the drive source, the 4W construction is simple and lightweight as a vehicle drive system.

[Brief explanation of drawings]

The drawing is a side view showing an embodiment of a vehicle drive device according to the present invention. 1: Engine 2: Reduction device 3: Planetary gear device 4:
Sun gear 7: Drive wheel 8: First human power shaft 10: Second human power shaft 11: Electric motor 12: Motor shaft 13: Internal gear 14: Planetary gear 17: Support frame 18 Drive shaft agent Patent attorney Front 1) Toshiyuki

Claims (1)

[Claims] 1. The second human power shaft fixed to the internal gear of the planetary gear system is directly connected to the motor shaft of the electric motor, and the second human power shaft fixed to the sun gear is connected directly to the motor shaft of the electric motor.
The human power shaft is loosely inserted into the second human power shaft and connected via a reduction gear to an engine driven at a predetermined rotation speed with good fuel consumption efficiency, and the support frame of the planetary gear is attached to a drive wheel. A drive system for Oki 1 cars that is characterized by being connected to a shaft.