DE102011003723A1 - Differential gear motor for dividing driving power to power trains of motor vehicle, has coaxial shaft motor comprising inner and outer rotors whose rotational movements are transferred to drive shafts of power trains, respectively - Google Patents

Abstract

The gear motor has a coaxial shaft motor (A) comprising an inner rotor whose rotating movement is transferred to a drive shaft (8) of power trains through an inner engine shaft (1) and bevel gears (4, 5) of the drive shaft. Rotating movement of an outer rotor of the shaft motor is transferred to another drive shaft (7) of the power trains through an outer motor shaft (2) i.e. sleeve shaft, and bevel gears (3, 6) of the latter drive shaft. The drive shafts are coupled against each other and formed as a coaxial shaft assembly. The rotors are freely and rotatably supported in a housing (D).

Description

The invention relates to a differential gear motor for dividing the drive power on two or more drive trains via bevel gears on at least one drive shaft per drive train.

It is known that the power of an engine in a differential / differential gear is divided into two drive shafts, for example, in a motor vehicle to allow a proportionate drive of the drive wheels when cornering. Such a differential is an independent assembly in the powertrain of an automobile. It has one input connected to the engine and two outlets connected to the respective drive wheels.

A change in the distribution of engine power in terms of position, location and number of transmission components and outputs, and on the distinction of the gear ratios and the direction of rotation of the two outlets is in such a differential / differential gear not, or only limited possible.

In terms of their rotating component, motors are divided into shaft motors and recirculating motors, the attachment of which must be designed so that it can absorb and dissipate the reaction forces.

In an electric motor, a combination of this subdivision is possible.

In such a coaxial shaft motor both electromagnetically interacting components of an electric motor, a rotor / rotor and a stator / armature in a coaxial arrangement, are rotatably mounted in a housing and proportional to each other. This results in two rotors, an inner and an outer rotor, which are driven in opposite directions and whose rotational movements can be removed simultaneously on coaxial shafts at both ends of the motor. This combination is also possible with pneumatic and hydraulic motors.

The invention has for its object to provide a differential gear motor, with a change and combination of the distribution of the motor power of a coaxial shaft motor is made possible and thus to expand the range of applications.

This object is achieved with the features of claim 1.

Further embodiments of the invention will become apparent from the accompanying dependent claims. In particular, the power is already divided in the coaxial shaft motor, the gear connected to the engine provide the power under conditions favorable for the intended use. The invention will be explained in more detail below with reference to several embodiments.

The accompanying drawings show:

1 a differential gear motor according to the invention with drive shafts driven in the same direction;

2 : a variant after 1 with counter-driven drive shafts;

3 a version with a switchable in the direction of drive shaft;

4 a differential geared motor having coaxially arranged drive shafts on both sides of the drive train;

5 a differential geared motor coaxial with the drive shafts along an axis, and

6 : a differential gear motor according to the invention with synchronizing function or with lockable differential function.

The differential gear motor mainly consists of a coaxial shaft motor A with an inner and an outer rotor, at least one gear B connected thereto, a device C for controlling and powering the coaxial shaft motor A and a housing D. The rotations of the two rotors are preferably together at one end of the Motors A removed ( 1 ).

The inner rotor of the coaxial shaft motor A is provided with an inner motor shaft 1 and the outer rotor with an outer motor shaft 2 connected, the latter being designed as a hollow shaft. On both motor shafts 1 . 2 is ever a bevel gear 3 . 4 attached. In each of these bevel gears 3 . 4 each engages another bevel gear 5 . 6 one that is on drive shafts 7 . 8th are arranged opposite one another on a common axis of rotation. The further bevel gear 6 combs with the bevel gear 3 according to the drawing, left of the axis of symmetry of the coaxial shaft motor A and the bevel gear 5 meshes with the bevel gear 4 to the right of the axis of symmetry of the coaxial shaft motor A. The drive shafts 7 . 8th are thus driven in the same direction. From the drive shafts 7 . 8th the power of the coaxial shaft motor A in a suitable manner to be driven elements or assemblies such as the wheels of a Motor vehicle or conveyor wheels or other gear, be forwarded.

Functionally, the bevel gear 3 on the outer motor shaft 2 be larger than the bevel gear 4 on the inner motor shaft 1 to the bevel gears 3 - 6 to offer enough space.

For example, if a Elektoauto be driven, the intervention of the bevel gears 5 . 6 at the drive shafts 7 . 8th take place in the same direction (facing the engine) to a same direction of rotation of the drive shafts 7 . 8th on the same axis.

To drive four wheels of a vehicle, the above-described bevel drive arrangement at the other end of the coaxial shaft motor A can be repeated. For this it is necessary that the drive wheels of one side of a motor vehicle with the same output of the coaxial shaft motor A, either the outer shaft 2 or the inner shaft 1 are connected, and that the front and rear axles of the vehicle are equally steerable.

In the execution according to 2 the drive shafts are driven in opposite directions.

Will the bevel gear on the inner motor shaft 1 associated drive shaft 8th mounted on the left side of the drawing, the direction of rotation of this bevel gear changes 5.1 and the drive shafts 7 . 8th are driven in opposite directions.

The change in the direction of rotation can also by the analogous displacement of the bevel gear 4 on the inner motor shaft 1 be achieved. In this case, the inner motor shaft 1 through the intersection of the axes of the drive shafts 7 . 8th and the coaxial shaft motor A are lengthened. 3 shows an embodiment in which synchronism and reverse can be combined switchable in a transmission.

On the inner motor shaft 1 associated drive shaft 8th is an opposite pair of bevel gears 5 . 5.1 attached, which according to the drawing the bevel gear 5.1 left and the bevel gear 5 right of the axis of symmetry of the coaxial shaft motor A is located. The direction of rotation of this drive shaft 8th is changed if by a suitable changing device 9 , z. B. a shift sleeve, the bevel gears 5 . 5.1 by appropriate coupling with the drive shaft 8th be used alternately. The coupling can be achieved for example by a corresponding positive connection. In a motor vehicle thereby the center of curvature is laid between the drive wheels and the maneuverability of the vehicle, with an appropriate design of the steering increased. Here, a distinction must be made between the drive axle and the steering axle of the vehicle.

The switchable change in the direction of rotation can also be done by analogous attachment of the bevel gears and the changing device on the inner motor shaft 1 be achieved.

A combination of this transmission with a second gear at the other end of the coaxial shaft motor A is not advantageous for the drive of a motor vehicle, since the drive trains block each other in a change of direction.

For a symmetrical distribution of torque, and the rotational speeds of the motor shafts 1 . 2 To keep approximately equal to each other, it makes sense, the ratio of the two bevel gears 3 - 6 to choose the same.

The gear ratio in the bevel gears 3 . 6 / 4 . 5 determines the gear ratio of the coaxial shaft motor A to the drive shafts 7 . 8th ,

6 shows a gearbox that synchronizes or in which the differential function can be disabled.

With a suitable device, such as a wreath 10 with friction rollers 11 , which is connected to the housing D and between at the bevel gears 3 . 4 attached sloping treads 12 is positioned, the friction rollers can 11 be pressed continuously to this. This allows the transmission B to synchronize the differential function until it is completely disabled.

It is possible to arrange the synchronization device separately in a similar arrangement on the opposite side of the transmission B of the coaxial shaft motor A. The treads 12 in this case must be mounted on two discs opposite each other and the friction rollers 11 be positioned between them.

It is not mandatory, the drive shafts 7 . 8th to arrange on an axis. Outer and inner motor shaft 1 . 2 can be extended to suit the intended use. It is possible the inner motor shaft 1 opposite the outer motor shaft 2 to lengthen, so that there is a misalignment between the drive shafts 7 . 8th along the motor axis results.

A pivoting of a drive shaft about the motor axis is possible, with a sufficient displacement of the drive shafts 7 . 8th up to 180 degrees. A Adjustment of the angle between the drive shaft axes and the motor axis is also allowed.

Out 4 goes a variant of the transmission B with coaxially arranged drive shafts 7 . 8.1 respectively. 7.1 . 8th that are not connected.

Here are the bevel gears 3 . 4 two more bevel gears each 5.1 . 6 respectively. 5 . 6.1 coupled to the right and left of the axis of symmetry of the coaxial shaft motor A, wherein on the right side of the inner bevel gear 5 with the drive shaft 8th and the outer bevel gear 6.1 with a drive shaft 7.1 connected is. The drive shaft 7.1 is designed as a hollow shaft and surrounds the drive shaft 8th , On the left side are the bevel gears 5.1 and 6 in a corresponding way with the drive shafts 7 and 8.1 connected.

There may be one or more coaxial anti-sway waves 7 . 7.1 / 8th . 8.1 ... with associated bevel gears 5 . 5.1 / 6 . 6.1 ... be connected.

When using the geared motor for moving or in liquid or gaseous media conveying wheels, for. As used in compressors, pumps or turbines are attached to the drive shafts.

In a star-shaped arrangement of three coaxial shafts in a Y-shaped tube construction, with a pitch of about 120 degrees around the motor axis, six conveyor wheels can be driven. In a corresponding embodiment of the conveyor wheels, this results in a flow for distributing or merging of the medium.

In an additional pipe connection, a further coaxial shaft with associated gears can be connected along the motor axis for supplying or discharging the medium. It makes sense, the conveying direction of the feed wheels of the three o. G. To match drive shafts.

The number of in the bevel gears 3 . 4 of the coaxial shaft motor A engaging bevel gears can be increased, especially when the gear ratio is increased. In this case, the bevel gears on the drive shafts with respect to those on the shafts of the coaxial shaft motor A are reduced and it results in reducing the pitch space for the connection of other waves.

In this coaxial arrangement further gear B can be connected to the drive shafts 7 . 8.1 , / 7.1 . 8th ... are connected, since their arrangement corresponds to that of the coaxial shaft motor A.

A coaxial arrangement along one axis goes out 5 which essentially follows the order 4 equivalent.

In an arrangement of two coaxial drive shafts 7 . 7.1 / 8th . 8.1 along one axis, up to five connection possibilities can arise along this axis, if the inner shaft 8th of a drive train as opposed to 4 also through the inner wave 8.1 the opposite drive train is performed. If conveyor wheels are connected, the adjacent one is driven in opposite directions. It may be advantageous to choose the ratio of the bevel gears to each other unequal.

By the synchronization device already described above, stopping or spinning of the drive shafts and thus of the feed wheels can be prevented.

These coaxial drive shaft assembly transmissions may be repeated and / or combined at the other end of the coaxial shaft motor A. The direction of the two resulting flow rates to each other can be freely selected about the axis of the coaxial shaft motor A. It is also possible, within a pipe construction, to feed the exit of a conveyor line to the entrance of the second, in order to distribute and increase the energy input into a medium. This results in a flow up to ten conveyor wheels on two axes. With a suitable device, the setting angle of the Förderadschaufeln can be changed during operation in a known manner.

If the number of conveyor wheels on the connection possibilities is doubled, adjustable guide vanes can be placed between these conveyor wheels, starting from the pipe construction, in order to influence the flow. In this way, an increase in the number of compressor stages is possible.

With this arrangement of variable stator and / or rotor blades, synchronization can be accomplished by changing the pitch angle of these blades during operation.

Other combinations are possible within the framework of the production of grain, as far as the transmission components do not interfere with each other. Thus, for example, the number of bevel gears on the shafts of the coaxial shaft motor A can be increased in order to associate individual drive shafts with a separate transmission ratio, or to connect further shafts.

Furthermore, in a coaxial arrangement along an axis 4 three or each of the four shafts are led out coaxially to one side of the transmission.

The advantages of the invention are that the distribution of engine power can be changed and combined and thus the range of applications is extended.

A torque compensation about the axis of the coaxial shaft motor A is only required when using a synchronization device, since this is connected to the motor housing. Without the use of such a device, the reaction forces of one rotor are fed directly to the other rotor and form its drive. The attachment of the engine can be adjusted accordingly.

By the invention, the number of transmission components for driving a motor vehicle can be reduced, thereby reducing the production costs and ease of maintenance can be increased.

When using the shiftable transmission for the change of synchronism and mating the maneuverability of a motor vehicle can be increased. The steering of the motor vehicle is to be adjusted accordingly.

Other applications exist as a drive for aircraft and watercraft, as well as in stationary operation as a conveyor for gases and liquids by axial or radial compressor.

The coaxial shaft motor according to the invention is also suitable for generating electrical, pneumatic or hydraulic energy in mutatis mutandis reverse function. For this purpose, a combination of a turbine with a generator in an operation analogous to the differential gear motor is necessary.

In a motor vehicle, the braking energy can be utilized in a suitable manner.

Instead of the above-described bevel gears as coupling elements of the described differential gear motor, other gear wheel geometries, such as spur gears or worm wheels, can be used in a similar arrangement.

LIST OF REFERENCE NUMBERS

1

inner motor shaft

2

outer motor shaft

3

bevel gear

4

bevel gear

5

another bevel gear

5.1

bevel gear

6

another bevel gear

6.1

bevel gear

7

drive shaft

7.1

drive shaft

8th

drive shaft

8.1

drive shaft

9

changing device

10

wreath

11

friction roller

12

tread

A

Koaxialwellenmotor

B

transmission

C

Control power supply

D

casing

Claims (10)

Differential geared motor for dividing the drive power to two or more drive trains via bevel gears on at least one drive shaft per drive train, characterized in that the mutually coupled rotational movements of an inner rotor and an outer rotor of a Koaxialwellenmotors (A) each have a transmission to at least one drive shaft ( 7 . 8th ) of each drive train are guided. Differential geared motor according to claim 1, characterized in that both the inner rotor, and the outer rotor of the coaxial shaft motor (A) in a housing (D) are freely rotatably mounted and the rotational movements of the rotors coupled together on at least one side of the coaxial shaft motor (A) are, wherein the rotational movement of the inner rotor via an inner motor shaft ( 1 ) and with this coupled bevel gears ( 4 . 5 ) on at least one first drive shaft ( 8th ) and the rotational movement of the outer rotor via an outer motor shaft ( 2 ) and with this coupled bevel gears ( 3 . 4 ) on at least one second drive shaft ( 7 ) be transmitted. Differential geared motor according to claim 2, characterized in that the outer motor shaft ( 2 ) is a hollow shaft in which the inner motor shaft ( 1 ) running. Differential geared motor according to claim 3, characterized in that on the first drive shaft ( 8th ) two bevel gears ( 5 . 5.1 ) are arranged opposite one another, with the bevel gear ( 4 ) on the inner motor shaft ( 1 ) are engaged simultaneously and which alternately with the first drive shaft ( 8th ) can be coupled. Differential geared motor according to claim 4, characterized in that the alternating coupling of the bevel gears ( 5 . 5.1 ) with the first drive shaft ( 8th ) via a changing device ( 9 ) he follows. Differential geared motor according to one of claims 1 to 5, characterized in that with each of the bevel gears ( 3 . 4 ) in each case two further bevel gears are engaged, each with a drive shaft ( 7.1 . 8.1 ) of each drive train are coupled. Differential geared motor according to claim 6, characterized in that the drive shafts of each drive train are designed as a coaxial shaft arrangement. Differential geared motor according to claim 6 and 7, characterized in that one of the inner drive shafts of the coaxial shaft arrangement is led out to both drive trains. Differential geared motor according to one of claims 1 to 8, characterized in that a synchronization device with respect to the housing (D) stationary conical friction rollers ( 11 ) is provided, which extends between inclined running surfaces ( 12 ) on the bevel gears ( 3 . 4 ) and that the conical friction rollers ( 11 ) between the treads ( 12 ) are einpressbar. Differential geared motor according to one of claims 1 to 9, characterized in that a synchronization device on the transmission B opposite side of the coaxial shaft motor (A) is provided, on two discs opposite inclined running surfaces ( 12 ) between which the conical friction rollers ( 11 ), these being between the treads 12 are einpressbar.

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