WO2009112340A1

WO2009112340A1 - Rotary transmission arrangement

Info

Publication number: WO2009112340A1
Application number: PCT/EP2009/052010
Authority: WO
Inventors: Jürgen Kett; Matthias Reisch; Karl-Hermann Ketteler
Original assignee: Zf Friedrichshafen Ag
Priority date: 2008-03-13
Filing date: 2009-02-20
Publication date: 2009-09-17
Also published as: DE102008000644A1

Abstract

A rotary transmission arrangement is proposed for the contactless transmission of energy and/or signals between components which are disposed rotatably relative to one another, wherein each component is coupled to a coil carrier (1, 2), wherein said two corresponding coil carriers (1, 2) are spaced apart such that a gap (6) is provided between said coil carriers (1, 2), and wherein said gap (6) is at least regionally implemented as a bearing between said two coil carriers (1, 2).

Description

Drehübertraαunαsanordnunq

The present invention relates to a rotation transmission arrangement for non-contact transmission of energy and / or signals according to the closer defined in the preamble of claim 1. Art.

For example, from the document DE 10 2005 051 462 A1 a device for inductive power monitoring, a method for producing such a device and a rotary transformer is known. The known rotary transformer has two ring-shaped halves, a primary part and a secondary part, which are rotatable about a common axis relative to each other and with respect to this common axis coaxial with each other. The two halves are arranged so that an air gap is formed between them. The primary part is designed as a primary core comprising a primary coil. The secondary part is designed as a secondary core and comprises a secondary coil. The primary core and the secondary core of the known rotary transformer are aligned with each other so that the primary coil and the secondary coil radially opposite, wherein the coils are formed by a plurality of sheet metal layers. The gap provided between the coils is kept constant in the known rotary transformer by the outer mounting position. This is structurally complex and also the known rotary transformer is not suitable for the transmission of high-frequency signals.

Furthermore, from a not yet published application DE 10 2006 049 275 of the applicant an inductive transmission device to a countershaft of a dual clutch transmission known. The known transmission device is arranged coaxially to the countershaft, wherein a housing fixed executed coil assembly and another co-rotating with the countershaft coil assembly is provided. The two coil arrangements are associated with each other such that an energy and data transmission tion between the components connected to the coil assemblies is possible.

The present invention is based on the object to propose a rotary transmission arrangement for the contactless transmission of energy and / or signals of the type described above, which enables a low-wear transmission and also has a compact and inexpensive construction.

This object is achieved by the features of claim 1. Further advantageous embodiments will become apparent from the dependent claims and the drawings.

Accordingly, a rotary transmission assembly is proposed for non-contact transmission of energy and / or signals between relatively rotatable components, each coupled to at least one coil support or the like, and wherein the coil supports are spaced such that a gap or the like is provided between the coil supports , According to the invention, the gap may be formed at least in regions as a bearing or the like between the corresponding coil carriers.

By using at least one bearing in the region of the gap, the size of the gap between the coil carriers or the coils can be set to a minimum to optimize the effectiveness of the transmission, without further constructive measures are required. In addition, the rotation transmission arrangement according to the invention has a high efficiency, since the smallest possible gap is adjustable at least in the region of the coil through the bearings. With the proposed rotation transmission arrangement, a wear-free inductive and / or capacitive transmission between at least one non-rotating component and at least one rotating component can be realized. Due to the particularly simple construction Drehübertragungsanordnung this is inexpensive to produce and coaxial construction particularly space-saving installable. However, it is possible that the components or the coil support are also arranged axially adjacent to each other.

In the context of an advantageous embodiment variant of the invention, at least one slide bearing or the like can be provided along the gap between the coil carriers or the coils in the rotary transmission arrangement as a bearing. For example, a hydrostatic, hydrodynamic or even self-propelling bearing can be used. When using a self-inserting bearing, it is advantageous if the gap between the bobbins with e.g. magnetically conductive, non-brittle filling material is provided. However, there are also other types of bearings in the invention proposed rotary transmission assembly used.

Preferably, a provided bearing or sliding bearing along at least a portion of the gap may be provided, which is adjacent to a region of the gap, which accommodates the mutually facing coils of the coil support at least partially. Thus, it can be provided, for example, that in each case a bearing is provided in the axial direction in addition to the approximately centrally arranged coils. But there are also other possible arrangements of the coils and the bearing conceivable.

A next embodiment of the invention can provide that the coil carriers each form the ferromagnetic core of the associated primary coil and secondary coil. It is also possible a different structure of the bobbin. For example, other materials may also be used to achieve an amplification of the inductance of the respectively associated coil.

In the case of the rotary transmission arrangement proposed according to the invention, it can be provided, for example, that the corresponding coil carriers have an approximately cylindrical shape or the like when installed, ie when they are placed against one another. In addition to the possible cylindrical construction, a conical construction of the rotary transmission arrangement can also be provided. This means that then form the coil carrier in the assembled state of an approximately conical shape. Due to the conical design, a Ausformschräge is formed, since the bobbin are preferably produced by sintering or plastic-bonded.

Regardless of the particular design and manufacturing method used, the bobbins can be constructed in one piece or even in several parts. The structural design of the gap is independent of the particular design of the rotation transmission assembly. For example, the gap may have a conical shape at least in the area of the bearing. It is also possible that the course of the gap extends radially, so that a quasi-planar gap is provided. However, the gap can also run in the axial direction, so that quasi cylindrical gap areas are generated. Preferably, it can be provided that the gap extends in the axial direction in the region of the facing coils. However, other courses of the gap are also conceivable.

A next development of the invention may provide that the coils of the coil carrier are arranged, for example, in the axial direction overlapping or even side by side. The coils can be connected directly or indirectly to the coil carrier. In particular, when the coil carriers form the ferromagnetic core of each coil, it may be advantageous if the coil carrier has a fastening area provided, for example, of plastic for the respective coil. The coils themselves may be substantially cylindrical, conical or disc-shaped.

In order to be able to remove different voltages at the respective coil, it can be provided that in particular the secondary coil comprises one or more intermediate taps. In this way, the transmission of energy and data or signals is even more variable with the inventive proposed Drehübertragungsanordnung.

According to a further embodiment of the invention can be provided that the coils of the coil carrier are preferably wound from a high frequency suitable conductor material. For example, the high-frequency strand can be designed as a round profile or flat strand.

In the rotary transmission arrangement according to the invention, it can be provided that at least one rotatably arranged actuating device of a switching device of a transmission is assigned to one coil carrier, a housing-fixed control device and the further coil carrier. In this way, the intended for internal actuation actuator may be arranged in a form of a hollow shaft countershaft of a dual clutch transmission. The rotatably arranged coil carrier can be arranged as a module in a gear housing cover. Thus, a non-contact connection between the control unit and at least one actuator of a positive or frictional switching device can be realized, which is used in a stationary transmission or a vehicle transmission. It is readily possible that with the control device and a plurality of actuating devices via the rotation transmission arrangement according to the invention are contactlessly coupled.

However, there are also other applications for the proposed rotary transmission arrangement conceivable. Generally, an electric Connection of rotating electric motors or electromagnets, such. B. solenoids or hydraulic / pneumatic valves, to a z. B. housing-mounted control unit realized. By way of example, the rotary transmission arrangement proposed according to the invention can be provided for non-contact adjustment of the blade geometry in turbomachines, for example in turbines, turbochargers, retarders or pumps. It is also possible for the rotation transmission arrangement according to the invention to be used for camshaft adjustment in internal combustion engines, for example phasers. Possibly, the proposed rotary transmission assembly may also be used for distributing or switching fluid flows, for example, on-demand cooling oil supply to switching elements or the like.

Hereinafter, the present invention will be explained in more detail with reference to the drawings. Show it:

Figure 1 is a sectional view of an exemplary illustrated dual-clutch transmission with a rotary transmission assembly according to the invention.

Figure 2 is a schematic partial view of a first embodiment of the rotary transmission assembly in a cylindrical construction with conical gap.

3 shows a further schematic partial view of the first embodiment variant with multi-part coil carriers;

4 shows a schematic partial view of a second embodiment of the rotary transmission arrangement in a cylindrical construction with a radial gap; 5 shows a further schematic partial view of the second embodiment variant with multi-part coil carriers;

6 shows a schematic partial view of a third embodiment of the rotary transmission arrangement in a cylindrical construction with a cylindrical gap;

7 shows a further schematic partial view of the third embodiment variant with multi-part coil carriers;

8 shows a schematic partial view of a fourth embodiment of the rotary transmission arrangement in conical design with a conical gap;

9 shows a further schematic partial view of the fourth embodiment variant with multi-part coil carriers;

10 shows a schematic partial view of a fifth embodiment of the rotary transmission arrangement in a conical design with a planar gap;

Fig. 1 1 is a further schematic partial view of the fifth embodiment variant with multi-part coil carriers;

Figure 12 is a schematic partial view of a sixth embodiment of the rotary transmission assembly in conical construction with a cylindrical gap.

13 shows a further schematic partial view of the sixth embodiment variant with multi-part coil carriers; 14 shows a schematic partial view of a seventh embodiment variant of the rotary transmission arrangement with axially slit coils with a planar gap;

15 shows a schematic partial view of an eighth embodiment variant of the rotary transmission arrangement with axially overlapping coils with a conical gap;

16 shows a schematic partial view of a ninth embodiment variant of the rotary transmission arrangement with a planar gap and with coil carriers arranged axially next to one another;

17 shows a schematic partial view of a tenth embodiment variant of the rotary transmission arrangement with axially overlapping coils and with a planar gap arranged on one side;

18 is a schematic partial view of an eleventh embodiment of the rotary transmission arrangement with a centering on the coil carriers;

Fig. 19 is a schematic partial view of a twelfth embodiment of the rotary transmission assembly with axially overlapping coils and arranged on one side axial gap.

In Figure 1 is exemplified as a possible application for a proposed inventions rotary transmission assembly for non-contact transmission of energy and / or signals a multi-speed dual clutch transmission in countershaft design in section.

The dual-clutch transmission comprises two clutches whose input sides are connected to a drive shaft. In addition, a torsional vibration damper is arranged on the drive shaft. The exit pages The clutches are each connected to one of two coaxial transmission input shafts w_K1, w_K2. The first transmission input shaft w_K1 is designed as a solid shaft and the second transmission input shaft w_K2 as a hollow shaft. Furthermore, two countershafts w_v1, w_v2 are provided, which are arranged axially parallel to each other. At each countershaft w_v1, w_v2 a plurality of idler gears are arranged, which are in engagement with fixed gears on the transmission input shafts w_K1, w_K2.

In order to be able to shift the loose wheels of the respective countershafts w_v1, w_v2, two shift devices each are arranged on both countershafts w_v1, w_v2, in which the respective actuators are arranged in the countershafts w_v1, w_v2 designed as hollow shafts as an internal actuation. The actuators can move axially positive or non-positive switching devices to connect the respective idler gear with the countershaft w_v1, w_v2.

The respectively provided actuating devices or actuators 3, 3 '; 4, 4 'are rotatably connected to the associated countershaft w_v1, w_v2 and are controlled via a not further illustrated control unit and supplied with energy. The control unit is non-rotatably arranged in the transmission housing. According to the invention, a proposed rotation transmission arrangement for non-contact transmission of energy and / or signals between the components rotatably arranged relative to each other is provided.

Regardless of the respective embodiments, the rotary transmission arrangement comprises, for example, two coil carriers 1, 2, wherein a coil carrier 1 is connected to a rotationally fixed component and the other coil carrier 2 is connected to a rotatably mounted component. As a non-rotatable component, a not further shown control unit is provided in the application example shown in Figure 1. As rotatably mounted Kom- In the example of application, components are two actuators 3, 3 '; 4, 4 'in each formed as a hollow shaft countershaft w_v1, w_v2 provided. The actuators 3, 3 '; 4, 4 'are supplied together via the proposed rotation transmission arrangement with energy and control signals. Thus, both the driving energy required to drive the electric motors and bidirectionally the required drive signals can be exchanged contactlessly via the inductive rotation transmission arrangement.

As can be seen from FIG. 1, each countershaft w_v1, w_v2 is associated with a rotation transmission arrangement, wherein the coil support 1 fixed to the housing is connected to a gearbox housing cover 5 and is inserted axially into the countershaft w_v1, w_v2 designed as a hollow shaft. The rotatably mounted coil carrier 2 is in each case connected to the countershaft w_v1, w_v2. In order to fix the bobbin 1, a bore for a fastening screw can be provided, which simultaneously leads to a saving of material. For the fastening screw a reduction can be provided.

In the figures 2 to 19 different embodiments of the rotary transmission arrangement according to the invention are shown schematically, in each case only the corresponding coil carrier 1, 2 are shown with the associated coils 7, 8 and provided between the bobbins 1, 2 gap 6. Regardless of the respective embodiment variant, the gap 6 is subdivided into a region 6B in which the mutually facing coils 7, 8 are arranged, and regions 6A and 6C which adjoin the region 6B in each case. The provided on the bobbins 1, 2 coils 7, 8 can be performed with their ends through holes or openings, which are located on the respective bobbin 1, 2.

Regardless of the respective embodiment, it is provided in the rotary transmission arrangement proposed according to the invention that the gap 6 is at least partially formed as a bearing between the two bobbins 1, 2. As bearing a non-illustrated sliding bearing is preferably provided, which are preferably arranged in the regions 6A and / or 6C adjacent to the approximately centrally disposed region 6B. However, other arrangement options are conceivable. When using a plain bearing, the corresponding area 6A and / or 6C may be provided with a sliding bearing coating. For example, the gap 6 between the bobbins 1, 2 by means of flow with a medium, for example with an air cushion, an oil pad or the like, are generated.

FIGS. 2 and 3 each show a first embodiment of the rotary transmission arrangement according to the invention. In this embodiment, a cylindrical construction of the rotary transmission arrangement is selected, in which a coil carrier 1, the radially inner half and the other coil carrier 2 form the radially outer half. The two coil carriers 1, 2 serve as ferromagnetic cores of the associated coils 7, 8. The gap 6 provided between the coil carriers 1, 2 has a conical course along the regions 6A and 6C, an axial course only along the region 6B is provided. The conical shape offers the advantage that a suitable force can be applied in the axial direction in order to supply possibly existing air from the sliding bearing. FIG. 3 differs from FIG. 2 only in that the coil carriers 1, 2 in FIG. 3 are designed in several parts.

In Figures 4 and 5, a second embodiment of the invention is shown. In this embodiment variant, the gap 6 has a radial profile along the regions 6A and 6C, so that quasi-planar regions 6A and 6C are formed next to the region 6B with the coils 7, 8. Due to the radial course of the regions 6A and 6C of the gap 6, axial sliding warehouse required. The bobbin 1, 2 shown in Figure 5 are formed in several parts.

Figures 6 and 7 show a third embodiment of the rotary transmission arrangement, in which the regions 6A and 6C are horizontal and form quasi cylindrical gaps. The bobbin 1, 2 shown in Figure 7 are formed in several parts.

In contrast to the first, second and third embodiment, in the fourth, fifth and sixth embodiment according to FIGS. 8 to 13, a conical construction is realized in the rotary transmission arrangement. This is because so-called Ausformschrägen production reasons are provided, so that it results in the conical shape. The course of the respective gap 6 along the regions 6A, 6B and 6C are approximately identical.

In the first to sixth embodiments of the rotary transmission arrangement, the coil carriers 1, 2 each have an approximately L-shaped cross-sectional shape.

FIG. 14 shows a seventh embodiment variant of the rotary transmission arrangement in which the two coil carriers 1, 2 are arranged next to one another in the axial direction, with the associated coils 7, 8 overlapping. The regions 6A and 6C of the gap 6 are aligned radially in this embodiment and therefore have axial plain bearings. The coils 7, 8 are indirectly attached to the bobbins 1, 2 in this embodiment. Both coil carriers 1, 2 have approximately a U-shaped cross-sectional shape.

FIG. 15 shows an eighth embodiment in which only the coil carrier 2 assumes a U-shaped cross-sectional shape and forms the region 6B for accommodating the coils 7, 8, the regions 6A and 6C of FIG Slit 6 are provided on one side and have a conical shape. In this embodiment, only the coil 7 via z. B. a plastic material indirectly attached to the bobbin 1. The bobbin 1 has an approximately trapezoidal cross-sectional shape.

A ninth embodiment variant of the invention is shown in FIG. 16, in which the two coil carriers 1, 2 are arranged axially next to one another and are therefore virtually axially divided. In this way, a radially continuous gap 6 results. The coils 7, 8 are in this embodiment of the respective bobbin 1, 2 transformed and connected directly to this.

FIG. 17 shows a tenth embodiment in which only the coil 7 is again fastened indirectly via a plastic material to the associated coil carrier 1. Also in this embodiment, the bobbin 2 is U-shaped and forms inside the area 6B of the gap 6 for receiving the two coils 7, 8. The bobbin 1 has an approximately rectangular cross-sectional shape. The two areas 6A and 6C of the gap 6 are arranged on one side and have a radial course.

An eleventh embodiment variant is shown in FIG. 18, in which the coil carriers 1, 2 are configured in such a way that centering is realized. The coils 7, 8 overlap in the axial direction, wherein the regions 6A and 6C extend in the axial direction and are radially offset from each other. In this embodiment, the coils 7, 8 are connected directly to the associated coil carrier 1, 2.

Finally, FIG. 19 shows a twelfth embodiment of the rotary transmission arrangement according to the invention. Also in this embodiment, the bobbin 2 is approximately U-shaped and forms inside the area 6B for receiving the axially aligned coils 7, 8. The areas 6A and 6C of the gap 6 are formed on one side and have an axial course. In this embodiment, only the coil 7 is indirectly connected to the associated bobbin 1.

In the various embodiments of the rotary transmission arrangement according to the invention identical or similar components are also referred to in a modified version with the same reference number.

REFERENCE CHARACTERS

1 coil carrier

2 coil carriers

3, 3 'actuator

4, 4 'actuator

5 gear housing cover

6 gap

6A area of the gap

6B area of the gap

6C area of the gap

7 coil

8 bobbin w_K1 first transmission input shaft w_K2 second transmission input shaft w_v1 first countershaft w_v1 second countershaft

Claims

Patent Attorney

1. Rotary transmission arrangement for non-contact transmission of energy and / or signals between relatively rotatably arranged components, each component with a coil carrier (1, 2) is coupled, and wherein the two corresponding coil carrier (1, 2) are spaced such that a Gap (6) between the bobbins (1, 2) is provided, characterized Porsche Style n zei ch et, that the gap (6) at least partially as a bearing between the two coil carriers (1, 2) is formed.

2. Rotary transmission arrangement according to claim 1, characterized in that at least one slide bearing along the gap (6) between the coil carriers (1, 2) is provided as a bearing.

A rotary transmission assembly according to claim 2, characterized in that the sliding bearing is provided along at least a portion (6A, 6C) of the gap (6) adjacent to a portion (6B) of the gap (6), the portion (6B) the mutually facing coils (7, 8) of the coil carrier (1, 2) at least partially receives.

4. Rotary transmission arrangement according to one of the preceding claims, characterized Porsche Style n zei ch et, that the coil carriers (1, 2) each form the ferromagnetic core of the associated coil (7, 8).

5. Rotary transmission arrangement according to one of the preceding claims, characterized Porsche Style n zei ch et, that the corresponding coil carrier (1, 2) form an approximately cylindrical construction when installed.

6. Rotary transmission arrangement according to one of the preceding claims, characterized Porsche Style n zei ch et, that the corresponding coil carriers (1, 2) form an approximately conical construction in the installed state.

7. Rotary transmission arrangement according to one of the preceding claims, characterized Porsche Style n zei ch et et, that the coil carrier (1, 2) are formed in one or more parts.

8. Rotary transmission arrangement according to one of the preceding claims, characterized Porsche Style n zei ch et, that at least the region (6 A, 6 C) of the gap (6) in the axial direction has an approximately conical shape.

9. Rotary transmission arrangement according to one of the preceding claims, characterized Porsche Style n zei ch et, that at least the region (6A, 6C) of the gap (6) has a radial course.

10. Rotary transmission arrangement according to one of the preceding claims, characterized Porsche Style n zei ch et, that at least the region (6A, 6C) of the gap (6) has an axial course.

11. Rotary transmission arrangement according to one of the preceding claims, characterized Porsche Style n zei ch et et, that the coils (7, 8) of the coil carrier (1, 2) in the axial direction in the region (6B) of the gap (6) are arranged overlapping.

12. Rotary transmission arrangement according to one of the preceding claims, characterized Porsche Style n zei ch et, that the coils (7, 8) of the bobbin carriers (1, 2) are arranged side by side in the axial direction.

13. Rotary transmission arrangement according to one of the preceding claims, characterized Porsche Style n zei ch et, that the coils (7, 8) directly or indirectly with the coil carrier (1, 2) are connected.

14. Rotary transmission arrangement according to one of the preceding claims, characterized Porsche Style n zei ch et, that at least one coil (7, 8) of the bobbin (1, 2) has at least one intermediate tap for removing different voltages.

15. Rotary transmission arrangement according to one of the preceding claims, characterized Porsche Style n zei ch et, that the coils (7, 8) of the coil carrier (1, 2) are wound from a high frequency suitable conductor material.

16. Rotary transmission arrangement according to one of the preceding claims, characterized in that a coil carrier (1) a housing-fixed control device and the further coil carrier (2) are associated with a rotatably arranged actuator of a switching device.

17. The rotary transmission arrangement according to claim 16, characterized in that the actuating device provided for internal operation is arranged in a countershaft (w_v1, w_v2) of a dual-clutch transmission designed as a hollow shaft, and in that the control device is arranged rotationally fixed in a transmission housing cover (5).