KR20130076196A

KR20130076196A - Driving apparatus of in-wheel type which built in transmission or reducer integrally

Info

Publication number: KR20130076196A
Application number: KR1020110144687A
Authority: KR
Inventors: 김석준
Original assignee: 김석준
Priority date: 2011-12-28
Filing date: 2011-12-28
Publication date: 2013-07-08

Abstract

PURPOSE: A driving apparatus of the in-wheel type is provided to suppress driving efficiency reduction by deleting a drive transfer medium. CONSTITUTION: A stator (30) is inscribed in the inner peripheral surface of a motor case (20). A rotor case (40) is rotatively circumscribed on a double shaft (10). Multiple permanent magnets (50) are fixedly circumscribed on the outer peripheral surface of the rotor case. A motor output part (60) is rotated with the rotor case. A driving shaft (80) receives power of the motor output part through a shift or a reduction device (70).

Description

Driving apparatus of in-wheel type which built in transmission or reducer integrally}

The present invention relates to an in-wheel type drive device, and more particularly, a motor and a reducer or a transmission are mounted in a wheel so that the rotation center of the motor and the reducer or the motor and the transmission is concentric with the rotation center of the wheel. It relates to a drive device.

Conventional drive device has a case in which the output shaft is disposed in the center and rotatably mounted, a stator which is inscribed in the case and coiled a plurality of times, fixedly circumscribed to the output shaft and spaced radially inwardly to the stator It includes a rotor and a transmission or a reducer operatively coupled to the output shaft with a plurality of permanent magnets are mounted at regular intervals in the circumferential direction.

In the conventional drive device having such a configuration, as shown in FIG. 2, the motor and the transmission or the reducer are spaced apart from each other.

In the conventional drive device having such a configuration, in order to drive the wheel, as shown in FIG. 3, the output shaft of the reducer or the transmission is spaced apart at regular intervals in the direction of the output axis of the motor with respect to the case of the motor to drive the wheel. do.

This arrangement is not only a problem that the drive device disposed in the wheel increases the thickness in the direction of the center of rotation of the wheel so that the hub of the wheel is enlarged in the width direction of the wheel, but also the transmission of the chain or belt connecting the motor output shaft and the reducer or transmission. There is a need for a medium, which causes a problem of lowering system efficiency compared to 1: 1 direct connection due to its own transmission efficiency.

In addition, the conventional in-wheel motor type drive device has a problem that the rotor, which is a heavy object, is only circumscribed to the output shaft of the motor to drive only the output shaft, so that the portion occupied by the rotor acts only as a heavy object, which is inefficient. .

In addition, the conventional in-wheel motor type driving device has a structure in which the rotor of the motor driving the wheel is located outside to directly drive the wheel, thereby increasing the volume of the magnetic flux gap that determines the motor output, thereby increasing the output in normal operation after starting. On the other hand, during start-up itself, it acts as an inertia moment, requiring a starting current of 3-4 times the normal current, which causes a heavy load on the battery, a system power source, and causes a shortening of battery life. In order to solve the problem, the capacity of the battery is forced to increase, which may cause a rise in manufacturing cost.

The present invention has a problem in solving the above problems.

According to the present invention, the rotor is made into a hollow cylindrical portion, and the transmission or the reducer is inserted into the cylindrical portion so that the transmission or the reducer acts as a heavy object, and the motor output unit for transmitting power to the transmission or the transmission is the cylindrical portion. The problem can be solved by making the gear or the output of the transmission inscribed to the hub of the wheel having the same center as the center of rotation of the rotor.

The present invention, by the problem solving means as described above, the transmission or reducer is inscribed in the rotor to act as a heavy object, reducing the thickness in the direction of the center of rotation of the rotor than conventional, and at the same time the rotor is The weight can be lowered, making it possible to reduce the manufacturing cost of the drive.

In addition, since the transmission or the reduction gear is inscribed in the rotor, the present invention can increase the size of the motor compared to the conventional driving apparatus without increasing the hub width of the wheel, thereby driving the wheel with greater power than the conventional. Makes it possible.

In addition, the present invention provides an existing in-wheel motor structure by flexibly responding to the required torque by utilizing the characteristics of the transmission or the reducer at low speed or at start-up by integrating the output shaft of the rotor and the reducer or transmission output shaft on the same axis. Compared with this, the required output of the motor can be reduced, and the drive efficiency reduction can be suppressed by eliminating drive transmission media such as a belt or a chain.

In addition, the present invention by providing the in-wheel power transmission structure can be changed without major changes in the mechanical structure of the in-wheel motor power structure or the wheel structure of the existing vehicle currently employed to provide an effect that facilitates the renovation work. Can be.

1 is a view showing the in-wheel type drive device of the embodiment of the present invention,
2 is a view showing a state in which a motor and a transmission or a reducer are coupled to each other in the related art;
Figure 3 is a view showing a state in which the conventional drive device of Figure 2 is applied in-wheel motor structure. And
Figure 4 is a view showing a state in which the drive device of the present embodiment of Figure 1 is applied to the wheel in the in-wheel type.

Hereinafter, the in-wheel type driving device according to the present invention will be described with reference to FIG. 1.

In Fig. 1, the driving device of the present embodiment is indicated by the reference numeral 100.

The drive device 100 is fixedly inscribed in the hub 1 of the wheel (not shown).

The drive device 100 is a drive wheel 90 of the U-shaped cross section fixedly inscribed in the tubular hub (1), the tubular biaxial shaft (10) rotatably mounted via a bearing on the drive wheel (90) , A cylindrical motor case 20 having both sides fixedly circumscribed and supported by the biaxial shaft 10, a stator 30 in which a coil is wound a plurality of times by being inscribed on an inner circumferential surface of the motor casing 20, the biaxial shaft 10. The rotor case 40 of the cylindrical shape is rotatably circumferentially and the outer circumferential surface of the stator 30 radially inwardly spaced apart, the outer circumferential surface of the rotor case 40 is fixedly circumferentially The rotor case 40 has the same center as the center of rotation of the plurality of permanent magnets 50, the rotor case 40 is fixedly inscribed in the rotor case 40 disposed at a predetermined interval Rotary motor together The drive wheel 90 receives the power of the output unit 60 and the motor output unit 60 through the speed change or deceleration means 70 and has one end rotated with the same drive center as the drive wheel 90. A drive shaft 80 coupled to the other end and connected to an output side of the shifting or deceleration means 70 and extending through one side of the biaxial shaft 10 with the same center as the center of the biaxial shaft 10. It includes.

The motor output unit 60 may be, for example, a ring shape and may be a motor output unit in which gear teeth are formed on an inner circumferential surface thereof. An intermediate gear 71 engaged with the teeth and rotatably mounted to an axis fixed to the biaxial axis 10 and extending in parallel with the direction of the central axis of the biaxial axis; and the driving shaft 80 engaged with the intermediate gear 71. It may include a final gear 72 coupled to the drive shaft 80 having a central axis on the central axis of the.

In order for the speed change or deceleration means 70 to function as a speed reducer or a speed change function, the number of gear teeth of the motor output unit 60 and the intermediate gear 71 and the final gear 71 of the speed change or deceleration means 70 are determined. This is possible by varying the number of teeth.

In addition, when the speed change or deceleration means 70 is a continuously variable transmission using a lever crank mechanism, the motor output part 60 fixedly inscribed in the rotor case 40 becomes an input link, and the motor output part And a variable pin that is elastically supported in a variable radial direction, and has one end of a plurality of coupler links coupled to the variable pin, and one end of a plurality of output links at the other end of each of the plurality of coupler links. Link coupling, fixedly externally the final output gear to the drive shaft 80, and the driven gear to be engaged with the final output gear on each of the other end of the plurality of output links via a one-way clutch bearing.

Such a continuously variable transmission is described in detail in Korean Patent Publication No. 10-1027833.

5 and 7 of the above publication, the sign of the variable pin is referred to as P, the sign of the input link is referred to as 130, and the sign of the plurality of coupler links is 191, 192 193, and 194. And the sign of the final output gear is referred to as G3, and the sign of the plurality of output links is referred to as 171, 172, 173, and 174, and the sign of the driven gear is 121, 122, 123, And 124, the sign of the drive shaft 80 is referred to as G4, and the sign of the one-way clutch bearing is referred to as 151, 152, 153, and 154.

The driving device configured as described above may be operated as follows.

When power is applied to the stator 30, the rotor case 40 is rotated about the biaxial shaft 10, and thus the motor output unit 60 inscribed in the rotor case 40 is also rotated. It rotates with the case 40.

As the motor output unit 60 rotates, the speed change or deceleration means 70 linked to the motor output unit 60 is also increased or decelerated to transmit power to the drive shaft 80, and the drive shaft 80. As the wheel rotates, the driving wheel 90 coupled to the drive shaft 80 rotates together, so that the hub 1 rotates and the wheel (wheel) rotates.

The drive device having such a configuration can be applied in-wheel type to the wheel of the electric motor, as shown in FIG. 4.

By such a configuration, the drive device of the present embodiment causes the transmission or the reducer to be inscribed in the rotor to act as a heavy object, thereby reducing the thickness in the direction of the center of rotation of the rotor as compared with the conventional, and at the same time, the rotor is It is possible to reduce the manufacturing cost of the drive unit, and to increase the size of the motor than the conventional drive unit without increasing the hub width of the wheel, since the transmission or the reducer is inscribed in the rotor. This can make it possible to drive the wheel with greater power than conventional ones.

One; Herbs, 10; Biaxial, 20; Motor case, 30; Stator, 40; Rotor case, 50; Permanent magnet, 60; Motor output 70; Shift or deceleration means, 80; Drive shaft, 90; Drive wheel, 100; Drive

Claims

A drive wheel 90 having a U-shaped cross section fixedly inscribed to the tubular hub 1;
A tubular biaxial shaft (10) rotatably mounted to the drive wheel (90) via a bearing;
A motor case 20 having a cylindrical shape in which both sides of the biaxial shaft 10 are fixedly circumferentially supported;
A stator 30 inscribed on an inner circumferential surface of the motor case 20 and wound with a coil a plurality of times;
A cylindrical rotor case 40 rotatably circumscribed to the biaxial shaft 10 and spaced apart from the stator 30 in a radially inward outer circumferential surface;
A plurality of permanent magnets (50) fixedly circumscribed to the outer circumferential surface of the rotor case (40) and disposed at regular intervals in the circumferential direction;
A motor output unit 60 having the same center as the center of rotation of the rotor case 40 fixedly inscribed in the rotor case 40 and rotating together with the rotor case 40;
The power of the motor output unit 60 is transmitted to the driving wheel 90 so that one end of the power is transmitted through the speed change or deceleration means 70 and one end rotates with the same driving center as the driving wheel 90. And a drive shaft 80 coupled to the output side of the shift or deceleration means 70 and extending through one side of the biaxial shaft 10 with the same center as the center of the biaxial shaft 10. In-wheel type drive unit with integral transmission or reducer.

The method of claim 1,
The motor output unit 60 is in a ring shape
Gear teeth are formed on the inner circumferential surface of the motor output unit 60,
The shift or deceleration means 70
An intermediate gear 71 engaged with a tooth of the motor output unit 60 and fixed to the biaxial axis 10 and rotatably mounted to an axis extending in parallel with a direction of the central axis of the biaxial axis; and the intermediate gear 71. And a final gear 72 coupled to the drive shaft 80 with a center axis on the center axis of the drive shaft 80. Device.

The method of claim 1,
The shift or deceleration means 70 is a continuously variable transmission using a lever crank mechanism,
The motor output unit 60 fixedly inscribed in the rotor case 40 acts as an input link,
The motor output unit 60 is provided with a variable pin that is elastically supported in a variable radially,
One end of the plurality of coupler links is link coupled to the variable pin,
One end of the plurality of output links is linked to the other end of each of the plurality of coupler links,
The drive shaft 80 has a final output gear fixedly circumscribed,
An in-wheel type drive device incorporating a transmission or a reducer integrally mounted at each other end of the plurality of output links is provided with a driven gear engaged with the final output gear via a one-way clutch bearing.

An electric transporting or moving means characterized in that it is equipped with an in-wheel type driving device in which the transmission or the reducer according to any one of claims 1 to 3 is integrated.