JPS62295722A - Wheel drive device - Google Patents

Abstract

PURPOSE:To make it possible to directly drive a wheel, by attaching a rotor in which a cage coil is provided in the inner surface of a ring-like cylinder shape magnetic material, to a brake drum on the wheel, and by providing a stator having multilayer windings corresponding to the rotor. CONSTITUTION:A brake drum 2 to which disc wheel 1 in a wheel assembly is attached, is fitted on one end part of an axle 1 which is rotated under the power of an internal combustion engine. Further, a cover shaft 4 is provided coaxially with the axle 1, an<d is made to be rotatable by use of a bearing 4a while it is supported to a vehicle body through the intermediary of a predetermined suspension unit. A rotor 5 of a motor, in which a plurality of metal rods 5a forming a cage coil is planted at equal intervals the inner side part of a cylindrical magnetic material over the entire periphery thereof, is attached to the drum section inner surface of the brake drum 2. Meanwhile a stator 6 is fixed to the cover shaft 4, corresponding to the rotor 5, and these stator 6 and the rotor 5 are covered with a motor cover 7 attached to the cover shaft 4.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a wheel drive device for driving a vehicle by attaching an electric motor to a brake drum of a wheel.

(Prior technology) Currently, most of the vehicles running in the city are powered by an internal combustion engine that rotates the axle and drives the wheels. Electric power is supplied from the motor to the electric motor that drives the axle, which rotates the wheels and provides driving force for the vehicle.

Furthermore, a method has been devised in which the energy from the exhaust gas of the internal combustion engine is recovered as exhaust energy, and this electric power is used to drive an electric motor to use it as a means for increasing the running power of the vehicle.

As a method of driving wheels with electric power, a rotor is fixedly provided with permanent magnets arranged radially around the wheel to form magnetic poles, the stator is fixedly attached to the axle or the vehicle body, and a storage battery is used. Japanese Patent Laid-Open No. 52-22214 discloses a drive device for an electric vehicle, etc., which supplies power to a stator and generates rotational force to the wheels.

(Problems to be Solved by the Invention) The proposal presented in the above-mentioned Japanese Patent Application Laid-Open No. 52-22214 is a DC machine that uses a storage battery installed in the vehicle as a power source, and regenerates exhaust energy into AC power. When used in an energy recovery device, there is a problem in rectifying the regenerated power and converting it into low-voltage direct current. Furthermore, in the above proposal, a problem arises in that a DC power switching supply mechanism is required when driving the rotor that drives the permanent magnets.

The present invention has been made in view of these problems,
The purpose is to provide a wheel drive device that operates on AC power and drives wheels without requiring a power supply switching mechanism.

(Means for Solving Problems) According to the present invention, a rotor having a cage-shaped coil provided on the inner surface of a magnetic body formed in an annular cylindrical shape is attached to a brake drum of a wheel, and a rotor corresponding to the rotor is attached to a brake drum of a wheel. A wheel drive device is provided in which a stator having a multiphase winding is provided on a vehicle body side.

(Function) According to the present invention, an annular cylindrical magnetic body having a cage-shaped coil on the inner surface is attached to the brake drum of a wheel as a single rotor, and a stator corresponding to this rotor is provided with polyphase windings to form a vehicle body. Since it is attached to the side, the wheel is driven by energizing the polyphase winding.

(Example) Next, an example of the present invention will be described in detail using the drawings.

FIG. 1 is a sectional view showing the configuration of an embodiment of a wheel drive device according to the present invention, and FIG. 2 is an explanatory view of a rotor and a stator thereof.

In Fig. 1.2, reference numeral 1 denotes an axle which drives the wheels by transmitting the power of the internal combustion engine mounted on the vehicle, and one end of which is connected to a power transmission mechanism, such as a differential gear device. A brake drum 2 is provided at the other end to which a disc wheel 3 of the wheel is attached. A cover shaft 4 is held on the vehicle body side by a predetermined suspension device, and pivotally supports the axle 1 by a bearing 4a. Note that 3a is a tire, which is attached to the outer periphery of the disc wheel 3 and constitutes a wheel.

Reference numeral 5 denotes the rotor of the electric motor, which is attached to the inner surface of the drum part of the brake drum 2. Magnetic material made of annular silicon steel plates is laminated in a cylindrical shape, and the inner part of the cylinder has an induction motor cage shape. A plurality of metal rods 5a serving as coils are planted at equal intervals over the entire circumference. Short rings 5b are made of a good electrical conductor, and are provided on both sides of the rotor 5 to electrically connect the ends of all the implanted metal rods 5a.

A stator 6 corresponds to the rotor 5, and is composed of a stator core 6a made of a magnetic material and a winding 6c. The stator core 6a has a plurality of convex poles 6b arranged radially in correspondence with the rotor 5 provided with cage-shaped coils, and the center portion thereof is fixed to the end of the cover shaft 4. and convex pole 6b
A winding 6c forming a multi-phase circuit is wound around the stator core 6c, and when the first winding 6c is energized, a rotating magnetic field is generated in the stator core 6a and the first rotor 5 is driven to rotate.

A motor cover 7 is attached to the cover shaft 4 and is formed to cover the stator 6 and rotor 5.

FIG. 3 is a blow diagram showing an example of the configuration of related parts that operate this embodiment, and shows an example of driving the rotor of this embodiment with a generator installed in the turbocharger of the engine. It is.

In the 3rd and 1st stage, the exhaust housing B1 of the A111 turbocharger B of En Son A was installed.
Turbine blade B2 is driven by the energy of exhaust gas discharged by engine A. A compressor blade B provided coaxially with the turbine blade B2
3 is driven, supercharged air is force-fed to the engine A via the intake pipe A2. In addition, turbine blade B
A generator C is provided between the turbine blade B2 and the compressor blade B3, and when the turbine blade B2 is driven by the energy of the exhaust gas, the electric power generated by the operation of the generator C is transferred to the controller D, which will be described later. sent to.

A rotation sensor E is attached to the cover shaft 4, detects the rotation speed of the axle l, and transmits a detection signal to the controller D.

Controller D is composed of a microcomputer,
The input/output device includes a converter and a rectifier, which converts the frequency of the electric power sent from the generator C.
It is supplied to the winding 6c provided on the stator 6. Then, according to a program stored in the memory of the microcomputer, in response to the detection signal from the rotation sensor E, the gravitational force is converted into a frequency of gravity that moves the rotor 5, and the winding 6C of the stator 6 is converted into gravity.
It is sent to

Note that F is a battery that supplies power to the controller D, and when charging the battery F, a part of the power generated by the generator C is rectified and charged via the controller D.

Next, the operation of this embodiment configured as described above will be explained.

When the turbine blade B2 is rotationally driven by the energy of the exhaust gas discharged from the engine A, the generator installed on the same axis rotates. W machine C starts generating electricity and transmits power to controller D. A detection signal based on the rotation speed of the axle l from the rotation sensor E is input to the controller D.
The frequency of the electric power transmitted in response to this detection signal is converted into an AC frequency that causes the rotor 5 to move, and is supplied to the winding 6C of the stator 6. Therefore, the rotor 5 is driven in the forward direction, thereby driving the tires 3a via the brake drum 2 and the disc wheel 3, thereby assisting the running force of both il'j.

On the other hand, when braking while the vehicle is running, the rotor 5 and stator 6
so that it operates as an induction generator.

In response to the detection signal from the rotation sensor E, the controller D controls the winding 6C of the polyphase circuit. Then, after rectifying the generated AC power from the winding 6C, the power is transmitted to the battery F to be charged.

In the above explanation, a wheel drive device was used to assist the running power of the vehicle driven by the torque of the engine. The driving device may be driven and used as the main driving force for the traveling force.

Although the present invention has been described above using one embodiment, various modifications are possible within the scope of the gist of the present invention, and these are not excluded from the scope of the present invention.

(Effects of the Invention) The present invention attaches an annular cylindrical magnetic body having a cage-shaped coil to the brake drum of a wheel to serve as a rotor, and attaches a stator having multiphase windings to the vehicle body to directly drive the wheels. Since the motor is equipped with a rotation sensor that detects the number of rotations of the wheels, it does not need a low-voltage DC power supply for driving, so there is no need for a power supply switching mechanism, and the motor constantly rotates in response to the rotational status of the wheels. This has the effect of allowing the child to move and drive the wheels.

Furthermore, when braking the vehicle, there is also the advantage that the braking force can be recovered as electrical energy.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the configuration of an embodiment of a wheel drive device according to the present invention, FIG. 2 is an explanatory diagram of its rotor and stator, and FIG. 3 is a configuration of related members that operate this embodiment. It is a block diagram showing an example. DESCRIPTION OF SYMBOLS 1... Axle, 2... Brake drum, 3... Disc wheel, 5... Rotor, 5a... Metal rod, 5
b...Short ring, 6...Stator, 6C...
winding.

Claims (1)

[Claims] A rotor having a cage-shaped coil on the inner surface of a magnetic material formed in an annular cylindrical shape is attached to the brake drum of the wheel, and a stator having a multiphase winding corresponding to the rotor is provided on the vehicle body side. Characteristic wheel drive device.