WO2017041124A1

WO2017041124A1 - Transmission assembly

Info

Publication number: WO2017041124A1
Application number: PCT/AT2016/050257
Authority: WO
Inventors: Johann KROPFREITER
Original assignee: Kropfreiter Johann
Priority date: 2015-09-10
Filing date: 2016-09-09
Publication date: 2017-03-16
Also published as: AT517618A4; EP3347623A1; AT517618B1

Abstract

The invention relates to a transmission assembly comprising two identical epicyclic gearings (1, 2), each having three shafts (3, 4, 5), between a transmission input (6) and a transmission output (7), wherein, of the three pairs of corresponding shafts (3, 4, 5) of the two epicyclic gearings (1, 2), a shaft pair (3) is assigned to the transmission input and output (6, 7), while the two remaining shaft pairs, whose shafts (4, 5) are drivingly connected to one another in a rigid counter-directional transmission ratio, have a counter-directional but identical transmission ratio, and wherein at least one of the shaft pairs of the shafts (4, 5) that are rigidly drivingly connected to one another is connected to a device (10) for torque application. According to the invention, in order to guarantee advantageous construction ratios, the device (10) for torque application applies the connected shaft pair (4, 5) with an acceleration torque diverted by the shaft (12, 20) of the transmission output (7) or the transmission input (6).

Description

Getriebeanordnunq

Technical area

The invention relates to a transmission arrangement with two identical, three shafts having epicyclic gearboxes between a transmission input and a transmission output, wherein one of the three pairs of corresponding shafts of the two epicyclic gears a pair of gears gear input and - is assigned output, while the other two shaft pairs whose waves mesh with each other in a rigid, opposing gear ratio

are drivingly connected, have an opposite but the same ratio, and wherein at least one of the shaft pairs of the rigidly drive-connected shafts is connected to a device for torque application.

State of the art

In order to obtain infinitely variable in their speed, mechanical transmission arrangements, it is known to provide two mutually coupled to each other epicyclic between a Getriebeein- and output and, for example, by applying individual gear members with a

To control braking torque so that the output side sets a desired speed. However, the possibilities of influence on the gear ratios remain limited.

In a transmission assembly used as a torque converter with two equal, each having three shafts Umlaufrädergetrieben between the Getriebeein- and output, it is also known (DE 26 35 946 A1), not the Getriebeein- and output associated with each other corresponding waves the two epicyclic gears to couple with each other via a rigid drive connection, wherein the rigid drive connections between the two corresponding pairs of shafts have an opposite translation with a product of the two ratios not equal to 1, so given due to the between the two epicyclic gears

Gear ratios at constant drive conditions an independent adjustment of the speed and torque on the

Gear output side takes place at the loads occurring there. Due to the unequal product of the predetermined ratios of the two gear ratios of the two rigid drive connections between the two epicyclic gearboxes by the speed of the transmission output shaft, the movement of the two

Umlaufrädergetriebe uniquely determined, which is a more extensive

Influence on the output speed precludes.

In order to allow a substantial influence on the respective overall ratio and thus an opportunity to adapt to different transmission requirements, it is also known (DE 10 201 1 101 887 A1, US 4 109 551 A, GB 2 309 272 A, DE 199 60 028 A1, DE 34 24 421 A1, WO 2007/046722 A1), that the two pairs of shafts of rigidly drive-connected shafts have an opposite but the same ratio and that at least one of the shaft pairs of rigidly drive-connected shafts is connected to a braking device. Following the same, but opposite translation ratios of the two rigid

Drive connections between the two epicyclic gearboxes, the speed of the output shaft at a constant speed of the drive shaft by braking the shaft pairs from the rigidly drive-connected

Waves are changed. However, the applied braking torques are associated with energy losses. In addition, the translation range is due to the structurally given transmission ratios between the two

Shaft pairs of rigidly connected to each other drive-connected waves. Presentation of the invention The invention is therefore the object of a transmission arrangement of the type described in such a way that at given

Drive conditions on the input side desired speeds on the output side of the transmission arrangement ensured by an advantageous influence on the two drive-connected epicyclic gear and thus the restrictions on the maximum ratio of the gear assembly can be avoided.

Starting from a gear arrangement of the type described above, the invention solves the task by the fact that the means for

Torque application the connected shaft pair with one derived from the shaft of the transmission output or the transmission input

Applied acceleration torque.

Due to the same but opposite translation ratio of the two rigid drive connections between the two epicyclic gearbox, the speed of the output shaft can be chosen largely independent of the speed of the drive shaft by a torque applied to the connected shaft pair, resulting in advantageous design conditions, because the torque from the shaft of Transmission output or the transmission input can be derived so that no separate drive for the torque application of the connected shaft pair must be provided.

Because of the same but opposite translation ratios in the range of the two pairs of waves of rigidly connected drive shafts a short and over the other pair of waves is given a long translation on the one pair of waves. If the shaft pair is stopped with the short gear ratio, the result is a high speed corresponding to the long gear ratio of the other shaft pair for the output shaft of the shaft

Transmission assembly. By stopping the shaft pair with the long one

Translation, the short gear ratio is effective. With a device connected to the shaft pair with the short translation for Drehmomentbeaufschlagung can thus the gear ratio of

Transmission arrangement can be increased over the long translation, because with the proposed Drehmomentbeaufschlagung compared to the prior art, the wave pair with the short translation not only slowed to a stop, but can also be driven in the opposite direction, which is otherwise given by the long translation Limitation of the translation ratio is lifted. This means with a corresponding derivation of an acceleration torque from the output shaft, that the output shaft can be accelerated to the highest speeds. In addition, when torque is applied, which is derived from the output shaft, the inevitable slip of hydraulic brake devices, especially at low speed differences, by the possibility of

Predefinition of any speed difference can be counteracted in a simple manner. Is the pair of waves with the long translation on the device for

Torque applied to a braking torque, the rotational speed of the output shaft is reduced in dependence on the braking torque, which is important when using such a gear assembly in a vehicle, for example for a downhill. The speed of the output shaft thus depends on the size of the at a given load torque on the

Wave pair with the short translation acting acceleration torque on the one hand and the force acting on the shaft pair with the long translation braking torque on the other hand.

So that the braking torque can be set sensitively to the shaft pair with the long translation, the device for

Applying torque to the rigidly interconnected shafts with the long gear ratio an additional rigid drive connection of these two waves with an approximately same, but different

Gear ratio, wherein one of the two shafts between the two drive connections comprises means for transmitting a limited torque. Due to the different gear ratios of the two drive connections, the shaft pair is through the two

Drive connections rotatably held, as long as the device for

Transmission of a limited torque allows no relative rotation of the two interconnected by the device shaft parts. When the limit torque is exceeded, a rotation of the shaft pair is permitted, the difference in the transmission ratios of the two

Drive connections between the shafts of this pair of waves determines the sensitivity of Bremsmomentbeaufschlagung.

As already stated, because of the special coupling of the two epicyclic gearbox, a rotation independent of the rotation of the input shaft rotation of the output shaft of the gear assembly is possible, so also reversing the direction of rotation when the two Umlaufrädergetriebe are controlled accordingly via the means for applying torque, but with a corresponding Construction effort is connected. Simpler design relationships arise when the shaft associated with the transmission output shaft having a shaft of three waves

Umlaufrädergetriebes is drivingly connected, wherein of the other two shafts of Umlaufrädergetriebes a shaft forms an output shaft and the other shaft is acted upon by a torque, so this

additional epicyclic gear forms a summation, with the help of the shaft of the gear output, a rotational movement is superimposed, the

Speed and direction of rotation of the output shaft determined.

Short description of the drawing

In the drawing, the subject invention is shown, for example. Show it

Fig. 1 shows a transmission arrangement according to the invention in a schematic

Block diagram,

Fig. 2 shows a modified embodiment of an inventive

Gear arrangement and Fig. 3 shows a transmission arrangement according to the invention with an additional

Summing.

Way to carry out the invention

1 comprises two epicyclic gearboxes 1, 2, each with three shafts 3, 4 and 5, wherein the shaft 3 of the planetary gear 1 the transmission input 6 and the shaft 3 of the planetary gear 2

Gear output 7 are assigned. The shafts 4 of the one and the shafts 5 of the other shaft pair are connected to each other via rigid drive connection 8, 9, which have opposing, but equal translations, so that the product of the two ratios is equal to 1. Due to these opposing gear ratios results from the rigid drive connection 8 a short and through the drive connection 9 a long translation between the two epicyclic gears 1, 2, with the result that at a non-rotatable holding the drive connection 8 the

Bevel gear 2 via the long translation of the drive connection 9 and when stopping this drive connection 9, the planetary gear 2 is driven via the short ratio of the drive connection 8.

By a device 10 for torque application, for example, the shaft pair 4 can thus influence the gear ratio of

Gear arrangement can be taken. Is on the device 10 no

Torque applied to the drive connection 6, so the shafts 4 can be moved independently of the device 10, so the output-side shaft 3 of the epicyclic gear 2 with respect to the speed and the

Direction of rotation independent of the input-side shaft 3 of the

Umlaufrädergetriebes 1 to be moved, because within the two

Bevel gear 1, 2 automatically sets a gear ratio corresponding to the speed ratio of the two shafts 3 because of the existing degrees of freedom. At the same time, however, this means that at least one of the shaft pairs 4 is activated by means 10 for the corresponding application of torque and 5, any gear ratio of the gear assembly can be adjusted.

In the illustrated embodiments, the epicyclic gear 1, 2 shown as a planetary gear, which is not mandatory, as it is not necessary to use the web 1 1 of the planetary gear bearing shafts 3 as input and output side waves, because this is the two Other waves 4, 5 of the planetary gear 1, 2 are suitable. 1, the web 1 1 of the planetary gear 1 is driven by a drive shaft 12 via a gear 13. Of the usually distributed over the circumference of the sun gear 14 arranged planetary gears 15 of the epicyclic gearbox 1, 2 is off

For clarity, only one hint. The sun gear 14 supporting shafts 4 and the shafts 5 for the ring gear 16 are rigidly connected to each other via the drive connections 8, 9, wherein the respectively used for this purpose

Gear pair 17, 18 can be replaced by another type of drive connection with a suitable translation, z. B. by a chain or belt drive. The output-side shaft 3 of the planetary gear 2 is connected symmetrically to the transmission input 6 via a gear 19 with an output shaft 20 according to the embodiment. At a predetermined speed of the drive shaft 12 thus the speed of the output shaft depends on the setting of the device 10 from.

The device 10 acts on the shafts 4 of the epicyclic gearboxes 1, 2 with an acceleration torque which is derived from the output shaft 20. For this purpose, the device 10 is connected via a meshing with the gear 19 gear 21 to the output shaft 20 and via a

Drive connection 22 connected to the shaft 4 of the planetary gear 1. As long as the device 10, the full torque on the

Drive connection 22 is transmitted, the drive connection 8 is driven accelerated with the effect that increases the speed of the output shaft 20. Only when exceeding the transmittable torque through the device 10, the acceleration of the shafts 4 of the epicyclic gear 1, 2 is reduced. When using a gear arrangement according to FIG. 1 in a vehicle, however, an acceleration of the output shaft 20 due to a discharge of the output shaft 20, for example due to a downhill, not desired. According to FIG. 2, provision is therefore made for braking the output shaft 20 by exerting a braking torque on the drive connection 9 with the long gear ratio, by way of a device 23 which is in the

The simplest case may consist of a corresponding brake. With the deceleration of the drive connection 9, the influence of the short ratio of the drive connection 8 on the gear ratios is greater until at standstill of the drive connection 9, the short translation of the drive connection 8 exclusively for the transmission ratio of the gear assembly

becomes decisive.

However, a simple brake does not allow a sensitive reduction of the

Speed of the waves 5 to. To provide improvements here, the two shafts 5 of the epicyclic gear 1, 2 next to the drive connection 9 may have a parallel drive connection 24 with a similar but different gear ratio, so that lock the drive connections 9, 24 in their rigid connection through the device 23 each other and thereby the waves 5 are stopped. Only when allowing a slip between the gear 17 of the drive connection 9 and the gear 25 of the drive connection 24, the shafts 5 in dependence on

turn approved slip. By means of an appropriate tuning of the devices 10 and 23, the gear arrangement can thus be adapted to the respective requirements with regard to acceleration and braking, it being advantageous to control the devices 10 and 23 accordingly, as indicated by the arrows 26.

In Fig. 3 is based on a gear arrangement, in its construction

basically corresponds to the gear arrangement of FIG. 2, a simple way shown, the direction of rotation of the output shaft 20 to change without a separate switching operation. In contrast to FIG. 2, however, the device 10 for returning the torque of the driven by the gear 19 acts Output shaft 27 not on the shafts 4, but on the interconnected by the drive connection shafts 5. For this purpose, the shaft 27 is drivingly connected via a pair of gears 28 to the device 10, the output side via a drive connection 29, the gear 17 of

Drive connection 9 between the shafts 5 acted upon. In addition, the device 23 for braking the drive connection 9 of the shaft 5 of

Circular gear 1 assigned, but this makes no difference in terms of the fundamental mode of action.

To take additional influence on the speed and direction of rotation of the output shaft 20, is an additional planetary gear 30 with three shafts

provided, two of which are formed by the shaft 27 and the output shaft 20, while the third shaft 31 is driven separately, according to the embodiment via a motor 32 which also drives the drive shaft 12 of the gear assembly. This in the embodiment also as

Planetary gear formed epicyclic gear 30 is connected via a

Drive connection 33 is acted upon by the motor 32 with a corresponding torque, which acts, for example, on the ring gear 34. The

Umlaufrädergetriebe 30 thus acts as a summing, wherein the drive via the drive connection 33 to the drive through the shaft 27 which drives the web 35, superimposed, so that connected to the sun gear 36

Output shaft 20 has one of the rotational speeds and directions of rotation of the web 35 and the ring gear 34 dependent speed and direction of rotation.

Claims

claims

1 . Transmission arrangement with two identical, three shafts (3, 4, 5) having epicyclic gearboxes (1, 2) between a transmission input (6) and a transmission output (7), wherein of the three pairs of corresponding shafts (3, 4, 5) the two epicyclic gear (1, 2) a pair of shafts (3) the

Gear input and output (6, 7) is associated with, while the other two pairs of shafts whose shafts (4, 5) are drivingly connected to each other in a rigid, opposing gear ratio, have an opposite but the same gear ratio, and wherein at least one of the shaft pairs the shaft (4, 5) rigidly connected to one another is connected to a device (10) for applying torque, characterized in that the device (10) for applying torque couples the connected shaft pair (4, 5) to one of the shaft (12, 20). the transmission output (7) or the transmission input (6) derived acceleration torque

applied.

2. Gear arrangement according to Anspruchl, characterized in that the means (10) for applying torque to the shaft pair of rigidly drive-connected shafts (4) is connected with a short translation.

3. Gear arrangement according to claim 2, characterized in that the pair of shafts of rigidly drive-connected shafts (5) with the long translation to a device (23) is connected to the torque application with a braking torque.

4. Gear arrangement according to claim 3, characterized in that the means (23) for the application of torque of rigid with each other

drive-connected shafts (5) with the long translation comprises an additional rigid drive connection (24) of these two shafts (5) with a similar but different transmission ratio and that one of the two Shafts (5) between the two drive connections (9, 24) has a device (23) for transmitting a limited torque.

5. Gear arrangement according to one of claims 1 to 4, characterized

in that the shaft (27) associated with the transmission output (7) is drive-connected to a shaft of an epicyclic gear (30) having three shafts (20, 27, 31) and that of the other two shafts (20, 31) of the epicyclic gear (1 , 2) one shaft forms an output shaft (20) and the other shaft (31) can be acted on by a torque.