WO2017152909A1

WO2017152909A1 - Torque transmission device comprising a driver ring

Info

Publication number: WO2017152909A1
Application number: PCT/DE2017/100164
Authority: WO
Inventors: Dominik Weis
Original assignee: Schaeffler Technologies AG & Co. KG
Priority date: 2016-03-10
Filing date: 2017-03-02
Publication date: 2017-09-14
Also published as: DE112017001189B4; DE112017001189A5; DE102017102733A1

Abstract

The invention relates to a torque transmission device (100) for a drive train of a vehicle and for coupling a drive shaft with at least one transmission input shaft (104, 108), comprising a flywheel (136) connected to the drive shaft, at least one counterplate (110, 116, 122) and a driver ring (134) for transmitting a torque between the flywheel (136) and the at least one counterplate (110, 116, 122). The invention is characterized in that the driver ring (134) has at least one target contour (150, 152) for cooperation with a stationary sensor (160).

Description

Torque transmission device with driving ring

The invention relates to a torque transmission device for a drive train of a vehicle and for coupling a drive shaft with at least one transmission input shaft comprising a flywheel connected to the drive shaft, at least one counter-plate and a driver ring for transmitting torque from the flywheel to the at least one counter-plate. WO 2015/149804 A1 discloses a dual clutch for coupling a drive shaft of a motor vehicle engine with a first transmission input shaft and / or a second transmission input shaft of a motor vehicle transmission, with a first part clutch for coupling the drive shaft with the first transmission input shaft, wherein the first part clutch, a first counter plate, a axially displaceable relative to the first counter-plate first intermediate plate and a relative to the first counter-plate and the first intermediate plate axially displaceable first pressure plate for pressing first friction linings of a first clutch plate between the first counter-plate and the first intermediate plate and between the first intermediate plate and the first pressure plate, a second part clutch for coupling the drive shaft with the second transmission input shaft, wherein the second part clutch, a second counter-plate, a relative to the second counter-plate axially displaceable second intermediate Nplatte and a relative to the second counter-plate and the second intermediate plate axially displaceable second pressure plate for pressing second friction linings of a second clutch plate between the second counter-plate and the second intermediate plate and between the second intermediate plate and the second pressure plate, one with the first counter-plate and the second counter-plate rotatably connected clutch cover for covering at least a portion of the first part clutch and / or the second part clutch, a pivotally supported on the clutch cover first lever member for displacing the first pressure plate and pivotally supported on the clutch cover second lever element for displacing the second pressure plate. From DE 10 2014 213 165 A1 discloses a torsional vibration damper is known, with a rotatable about an axis input part, with a primary flywheel mass forming part, and arranged coaxially to this, against the action of an accommodated in an annulus spring means relative to this rotatable output member wherein the annular space is formed by means of at least one separately formed to the mass part shell part. Preferably, the torsional vibration damper is designed as a dual mass flywheel. Such a dual mass flywheel can be a one-piece in a drive train

Replace the flywheel and favorably damp vibrations over the one-piece flywheel.

The object of the invention is to structurally and / or functionally improve an aforementioned torque transmission device. The object is achieved with a torque transmission device having the features of claim 1.

Characterized in that a driving ring of the torque transmitting device has at least one target contour for cooperation with a stationary sensor, can be dispensed with the use of a separately formed and arranged in the torque transmitting device sensor ring for detecting a rotational speed of a drive shaft, in particular a crankshaft, whereby space is saved. The stationary sensor is preferably a sensor known per se, which is suitable for detecting targets, for example a magnetic sensor, an inductive sensor or an optical sensor. The targets or target contours and the sensor are preferably provided for detecting a rotational speed of the drive shaft and / or for detecting an angular position of the drive shaft.

Unless stated otherwise or not otherwise determined from the context, the statements "axially", "radially" and "in the circumferential direction" refer to an extension direction of an axis of rotation of the driver ring. "Axial" then corresponds to an extension direction of the axis of rotation. "Radial "is then one for

Extension direction of the axis of rotation perpendicular and with the axis of rotation cutting direction. "In the circumferential direction" then corresponds to one

Arc direction around the axis of rotation.

In a preferred embodiment, the torque transmission device is a double clutch for coupling a drive shaft with a first transmission input shaft and / or a second transmission input shaft. Preferably, the dual clutch comprises a first partial clutch for coupling the drive shaft with the first transmission input shaft, and a second partial clutch for coupling the drive shaft with the second transmission input shaft, wherein the second partial clutch, a second counter-plate and a relative to the second counter-plate axially displaceable second pressure plate for pressing second Having friction linings a second clutch disc assembly. It is preferred if the first partial clutch has a first counterplate and a first pressure plate axially displaceable relative to the first counterplate for pressing first friction linings of a first clutch disk assembly. In addition, it is preferred if the second partial clutch has a second counterplate and a second pressure plate axially displaceable relative to the second counterplate for pressing second friction linings of a second clutch disk assembly. Particularly space-saving, it is when the first counter-plate and the second counter-plate are formed together by a central plate. The central plate may be composed of the first counter-plate and the second counter-plate or formed in one piece.

According to a preferred embodiment, the driving ring and the central plate are interconnected by means of a plurality of leaf spring assemblies. These leaf spring assemblies transmit the torque from the driving ring to the double clutch by each riveting a free end of each leaf spring packet to the central plate, and the other free end of each leaf spring packet is riveted to the driving ring. Preferably, the central plate, in particular by means of the leaf spring packets, gimbal connected to the driving ring.

According to a preferred embodiment, the driving ring comprises a

Ring portion having the at least one target contour. The ring portion is preferably cylindrical. It is preferred if the at least one target contour is formed as a passage in the driving ring. It is also preferred if the at least one target contour is formed as an opening in the driving ring.

Throughputs and breakthroughs can be brought into the drive ring with little effort in terms of manufacturing technology. The driving ring is preferably made of a magnetically or electrically conductive material, in particular a

Steel alloy, manufactured. Breakthroughs are regions without conductivity and are easy to detect. The resolution of the sensor arrangement is particularly good if the driving ring has a plurality of circumferentially distributed target contours arranged.

The target contours are preferably separated from one another in the circumferential direction by webs. Since the driver ring has exactly one first target contour and a plurality of second target contours, it is particularly easy to detect a rotation angle.

In summary and in other words, the invention thus provides, inter alia, a space-optimized torque transmission device, in particular a double clutch. In known from the prior art double clutches whose input speed is to be detected, there is a need to provide a sensor ring in the vicinity of the flywheel. This must be designed so that it is arranged together with a driving ring necessary in the same area of the coupling. This usually leads to an increased radial space requirement. Furthermore, double clutches are known in which the torque is transmitted from a crankshaft side flywheel to the double clutch via a gimbal connection. A component of this device is a drive ring, which is connected as part of the dual clutch during assembly of the transmission to the engine with the flywheel. This drive ring then kinematically belongs to the flywheel. According to the invention a unification of the components driving ring and sensor ring is provided, in the form that in a cylindrical portion of the driving ring a suitable contour is introduced in the form of circumferentially successive enforcements. These settings represent the target geometry required in the working range of a stationary sensor. The invention is particularly suitable for dry double clutches, but is not limited to these.

The flywheel is preferably designed as a one-piece flywheel or as a two-mass flywheel or another torsional vibration damper. A particularly good eradication of vibrations offers a dual-mass flywheel with a centrifugal pendulum assembly.

With the invention, a torque transmission device, in particular double clutch, made available, the space requirement is reduced by a separately trained sensor ring in the flywheel, due to the integration of the target contours can be omitted in the driver ring.

An embodiment of the invention will be described in more detail below with reference to FIGS. From this description, further features and advantages. Concrete features of this embodiment may represent general features of the invention. Features associated with other features of this embodiment may also represent individual features of the invention. They show schematically and by way of example:

Fig. 1 is a sectional view of a double clutch in the environment of a dual clutch transmission, and Fig. 2 is a perspective view of a driver ring arranged thereon leaf spring assemblies.

1 shows a torque transmission device 100, in the present case a double clutch. The torque transmission device 100 has a first partial clutch 102 for coupling a drive shaft, in particular a crankshaft of an internal combustion engine, with a first transmission input shaft 104, and a second partial clutch 106 for coupling the drive shaft with a second transmission input shaft 108 arranged concentrically to the first transmission input shaft 104. The first partial clutch 102 has a first counter-plate 110 and a relative to the first counter-plate 102. plate 1 10 axially displaceable first pressure plate 1 12 on. Between the first counter-plate 1 10 and the first pressure plate 1 12, a first clutch disc assembly 1 14 is arranged with friction linings. The first clutch disk assembly 1 14 is rotatably connected to the first transmission input shaft 104. The second Teilkupp- ment 106 has a second counter-plate 1 16 and a relative to the second counter-plate 1 16 axially displaceable second pressure plate 1 18. Between the second counter-plate 1 16 and the second pressure plate 1 18, a second clutch disc assembly 120 is arranged with friction linings. The second clutch disk assembly 120 is rotatably connected to the second transmission input shaft 108. In the illustrated exemplary embodiment, the first counterplate 1 10 and the second counterplate 1 16 are formed by a common central plate 122, resulting in a three-plate design.

With the central plate 122, and thus with the first counter-plate 1 10 and the second counter-plate 1 16, a clutch cover 124 is connected to which a configured as a plate spring first lever member 126 and configured as a plate spring second lever member 128 each pivotally supported.

During a pivot movement of the first lever element 126, the first lifting element 126 can axially displace the first pressure plate 1 12 via a tie rod 130 in order to frictionally close the friction linings of the first clutch disk arrangement 1 14 between the first opposing plate 1 10 and 10 for closing the first clutch disk arrangement 14 to press the first pressure plate 1 12, or for opening the first clutch disk assembly 1 14 a frictional engagement with the friction linings of the first first clutch disk assembly 1 14 cancel.

During a pivoting movement of the second lever element 128, the second lever element 128 can axially displace the second pressure plate 1 18 via a pressure pot 132 so as to frictionally lock the second clutch disk arrangement 120 between the second counter plate 16 and the second one for closing the second clutch disk arrangement 120 Pressing plate 1 18 to press, or for opening the second clutch disk assembly 120 a frictional engagement with the friction linings of the second clutch disk assembly 120 cancel. In the illustrated embodiment, the central plate 122 is connected via a driver ring 134 and a flywheel 136 to the drive shaft. For this purpose, the driving ring 134 and the central plate 122 are connected to each other by means of a plurality of leaf spring assemblies 138. The leaf spring packets 138 are distributed over the circumference of the driver ring 134. The central plate 122 is gimballed to the drive ring 134 by means of the leaf spring assemblies 138. The driver ring 134 kinematically belongs to the flywheel 136. Preferably, the leaf spring assemblies 138 are riveted on the one hand to the driver ring 134 and on the other hand, the central plate 122. Further, a starter ring 140 for initiating a starting torque for starting the vehicle engine is connected to the flywheel 136.

The central plate 122 and thus the first counter plate 1 10 and the second counter plate 1 16 are supported via a support bearing 142 on the outer second transmission input shaft 108 for the removal of axial forces and / or radial forces.

Fig. 2 shows the driving ring 134 in a perspective view. The drive ring 134 is substantially annular with an L-shaped cross section. The driver ring 134 has a cylindrical ring portion 144 and an annular disk-shaped flange portion 146. The flange portion 146 is erected perpendicular to the ring portion 144. The ring portion 144 and the flange portion 146 are integrally connected. The ring portion 144 and the flange portion 146 are rounded into each other. In the rounded transition region, the driving ring 134 has a plurality of distributed over the circumference, in particular drawn, pots 146 as attachment points for the leaf spring assemblies 138.

In the driver ring 134, the function of a sensor ring for determining the rotational speed and angular position of the drive shaft connected to the flywheel 136, in particular crankshaft integrated. For this purpose, the ring portion 144 distributed over the circumference arranged on a plurality of target contours 150, 152, which are presently designed as apertures. The ring section 144 has exactly one first target contour 150 and a plurality of second target contours 152. The first target contour 150 is essentially rectangular, wherein a first edge length oriented in the circumferential direction of the ring portion 144 is larger than a second edge length oriented in the axial direction. Each of the second target contours 152 is in the Sectile rectangular, wherein an oriented in the circumferential direction of the ring portion 144 first edge length is smaller than an axially oriented second edge length. The second target contours 152 are equal to each other. The target contours 150, 152 are separated in the circumferential direction by webs 154, 156, 158. In a first circumferential direction, the first target contour 150 is separated by a first web 154 from an immediately adjacent second target contour 152 and separated in the second circumferential direction by a second web 156 from an immediately adjacent second target contour 152. The first web 154, viewed in the circumferential direction, is wider than the second web 156. In each case, two adjacent second target contours 152 are separated from each other by a respective third web 158. All third lands 158 are the same width. Each of the third lands 158 is wider than a second target contour 152 when viewed in the circumferential direction.

The target contours 150, 152 have the function of a sensor ring, which cooperates with a stationary sensor 160 in a manner known per se, in particular for measuring the rotational speed of the drive shaft and / or for detecting an angular position in the circumferential direction of the drive shaft.

In a modification of the embodiment, not shown in the figures, the flywheel is designed as a per se known dual mass flywheel.

Although only a double clutch in the three-plate design is shown in Fig. 1, the invention is not limited to this embodiment. Even double clutches with multiple plates, such as a four-plate design or with multiple clutch discs per sub-clutch can be improved by the described integration of the target contours in the drive ring, in particular, the dimensions of the dual clutch can be reduced due to the saving of a separate sensor ring. LIST OF REFERENCE NUMBERS

100 torque transmission device, double clutch

102 first part clutch

104 first transmission input shaft

106 second part clutch

108 second transmission input shaft

1 10 first counter plate

1 12 first pressure plate

1 14 first clutch disk assembly

1 16 second counter plate

1 18 second pressure plate

120 second clutch disk assembly

122 central plate

124 clutch cover

126 first lever element

128 second lever element

130 tie rods

132 pressure pot

134 driving ring

136 flywheel

138 leaf spring package

140 starter wreath

142 support bearings

144 ring section

146 flange section

150 first target contour

152 second target contour

154 first footbridge

156 second bridge

158 third jetty

160 sensor

Claims

claims

Torque transmission device (100) for a drive train of a

Vehicle and for coupling a drive shaft with at least one

Transmission input shaft (104, 108), comprising one with the drive shaft

connected flywheel (136), at least one counter-plate (1 10, 1 16, 122) and a driving ring (134) for transmitting a torque from the flywheel (136) on the at least one counter-plate (1 10, 1 16, 122) characterized in that the driving ring (134) has at least one target contour (150, 152) for cooperation with a stationary sensor (160).

Torque transfer device (100) according to claim 1, characterized in that the torque transmitting device (100) is a dual clutch for coupling the drive shaft with a first transmission input shaft (104) and / or a second transmission input shaft (108) comprising a first part coupling (102) for coupling the drive shaft with the first transmission input shaft (104), wherein the first part clutch (102) a first counter-plate (1 10) and a relative to the first counter-plate (1 10) axially displaceable first pressure plate (1 12) for pressing first friction linings of a first clutch disk assembly (1 14), and a second sub-coupling (106) for coupling the drive shaft with the second transmission input shaft (108), wherein the second sub-clutch (106) a second counter-plate (1 16) and a relative to the second counter-plate (1 16) axially displaceable second pressure plate (1 18) for pressing second friction linings of a second Kupplungsscheibenanord tion (120).

Torque transmission device (100) according to claim 2, characterized

characterized in that the first counter-plate (1 10) and the second counter-plate (1 16) are formed together by a central plate (122).

Torque transmission device (100) according to claim 3, characterized

characterized in that the driving ring (134) and the central plate (122) by means of a plurality of leaf spring assemblies (138) are interconnected.

5. torque transmission device (100) according to at least one of

The preceding claims, characterized in that the driving ring (134) has a ring portion (144) which is in particular cylindrical, wherein the ring portion (144) having at least one target contour (150, 152).

6. torque transmission device (100) according to at least one of the preceding claims, characterized in that the sensor (160) is provided for detecting a rotational speed of the drive shaft and / or for detecting an angular position of the drive shaft.

7. torque transmission device (100) according to at least one of

preceding claims, characterized in that the drive shaft is a crankshaft of an internal combustion engine.

8. torque transmission device (100) according to at least one of

preceding claims, characterized in that the at least one target contour (150, 152) is formed as a passage in the driving ring (134) or an opening in the driving ring (134).

9. torque transmission device (100) according to at least one of

preceding claims, characterized in that the driving ring (134) has a plurality of circumferentially distributed target contours (150, 152).

10. torque transmission device (100) according to at least one of

preceding claims, characterized in that the target contours (150, 152) in the circumferential direction with each other by webs (154, 156, 158) are separated.