DE102016216706A1 - Central release with connecting plate for position detection - Google Patents

Abstract

The invention relates to a central release device (1) for a clutch system of a motor vehicle, having a release bearing (2) which adjoins a preload spring (3), wherein a sensor detection part (4) is connected to a release bearing in such a way that a position determination of the release bearing ( 2) can be achieved by detecting a sensor and wherein a sensor component (5) holding the connecting member (5) is connected directly to the preload spring (3).

Description

The invention relates to a Zentralausrücker for a clutch system of a motor vehicle. The Zentralausrücker has a release bearing, which causes an actuating movement and which connects to a preload spring. A sensor detection part, which can also be referred to as a target, is connected to a release bearing, so that a position determination of the release bearing can be achieved by detecting a sensor. In this case, the axial position of the release bearing is particularly detected by the sensor to detect the operating state of the clutch system based on that position value.

Generic Zentralausrücker are known from the prior art. So is from the European patent EP 1 898 111 B1 a Zentralausrücker for a hydraulic clutch actuation for engagement or engagement of a friction clutch for motor vehicles known. This discloses a housing having a cylindrical through bore and a concentrically arranged within the through hole tubular sleeve on which an operatively connected to the clutch annular piston is guided axially displaceable. Furthermore, that European patent discloses a sensor for detecting the axial position of the annular piston relative to the housing. Jenem sensor is associated with an axially displaceably guided magnetic body, which is axially connected without play with an annular ring attached to the inner ring for driving through the annular piston at the axial displacements. The focus of that patent is therefore to form a Zentralausrücker with a magnetic sensor device so that the distance between the sensor and the magnetic encoder at all relative axial displacements and occurring tumbling movements of the release bearing remains constant and on the guide surfaces for the magnetic body by the action of a drag torque in Operation no wear affecting the accuracy of the sensor signal occurs.

A disadvantage of this prior art is that a complex configuration of a coupling system with a plurality of components is necessary to realize a precise position determination of the release bearing.

Thus, the present application has the object to eliminate the disadvantages of the prior art, or at least mitigate and in particular to disclose a Zentralausrücker that can detect a operating state of a clutch of a sensor system with a reduced number of components.

This is inventively achieved in that a holding the sensor sensing part connecting member is connected / attached directly to the preload. Thus, a precise position determination of the axial position of the release bearing under a low maintenance of the total number of parts is possible. This reduces the complexity in the assembly. Furthermore, this embodiment causes the integration of the inventive concept in existing systems, since the connecting member is flexibly ausgestaltbar.

Advantageous embodiments are the subject of the dependent claims and are explained in more detail below.

Thus, it is advantageous if the connecting part is designed as a connecting plate. This brings about economic benefits. On the other hand, allows a connecting member as a sheet of high geometric flexibility, whereby the connecting part is adaptable to any installation situations. Furthermore, there are advantages if the connecting part is positively, force and / or materially secured to a winding portion of the preload. Thus, a particularly space-saving coupling between the connecting part and the preload spring is achieved.

It is likewise advantageous if the connecting part preferably predominantly surrounds a wire cross-section of the preload spring. In this way, a positive engagement of the preload spring is achieved, which causes a reliable coupling of the two components.

In particular, when the winding section is provided by the clutch closest to the winding of the preload spring follows a particularly space-optimized design. Thus, the closest turn fulfills not only the function of the axial bearing of the release bearing, but also the connection to the connecting member.

As soon as the winding section is part of such a turn that it has yet another turn radially inside it, there are advantages. The preload spring is thus configured differently wide in the radial direction, whereby it is on the one hand in many places wide enough to accommodate Verkippmomente, on the other hand takes away no space at such locations where no broad configuration is necessary.

In a further advantageous embodiment, a retaining plate is on the one hand connected to a release bearing inner ring of the release bearing and on the other hand connected to the connecting member. This retaining plate favors on the one hand a geometrically defined arrangement of the connecting plate in the coupling system, on the other hand it protects the release bearing against a dirt entry.

The inventively advantageously used retaining plate is configured as a ring. This has in cross section preferably a kind of z-shape, resulting in a plurality of contact surfaces result, which are usable so that the release bearing, the preload spring and the connecting plate to each other have stops.

As soon as the sensor detection part is plugged onto the connection component, a time-efficient assembly of the central release device according to the invention can be realized. Since the sensor detection part and the connecting member are preferably loaded in the axial direction of the Zentralausrückers and not just loaded in the radial direction of the Zentralausrückers, the connector realizes a robust operative connection in a simple configuration.

In particular, it is advantageous if at least one axially projecting limiting flange for limiting the radial extent of the lead-in spring is present on the connecting component. Preferably, a plurality of boundary flanges are arranged. In this way, the connection component is capable of fulfilling a plurality of functions, whereby the goal according to the invention of decreasing the number of components is further complied with.

It is also advantageous if the release bearing is designed as a ball bearing. Ball bearings are well known in their various embodiments and are characterized by a high reliability. This is of great importance to the central operator.

In other words, it can be said that the subject of the invention is a central disconnector having a connecting component. A central release mechanism according to the invention is preferably used in disconnect couplings whose actuation travel is to be detected. The function of the connecting plate can thus be described as connecting the release bearing or preload spring to a target guide.

The central release mechanism according to the invention may be a master cylinder, for example a concentric master cylinder (CMC) or else a slave cylinder, for example a concentric slave cylinder (CSC). Their axial positions are detected by means of measurement, such as Hall sensors. For this purpose, it is advantageous to attach a ring-shaped component, a connecting component, to the release bearing. With this component, in turn, the target holder is connected such that the Ausrückweg can be detected by the target or the target holder or the sensor detection part and a sensor.

The inventive idea includes several possibilities of implementation. So it is advantageous if the release bearing is connected via the retaining plate with the preload spring. The connecting plate in turn is wound around the last turn of the preload spring. On the one hand, the connection for a bellows surrounding the preload spring is integrated in this connecting plate. On the other hand, the connecting plate also realizes a radial connection to the outside, where the target holder engages with a target. By raising or lowering the release bearing, the target moves in the target holder.

It is also possible that the release bearing is connected to the retaining plate with the preload spring. In addition, the last turn of the preload spring is extended and nested radially outward. The target guide with the target holder engages in this extended end of the preload spring and thus detects the Ausrückweg the release bearing.

The device according to the invention can thus be used in all CSC applications with at least one displacement sensor.

In summary, it can be said that the central disengers which are known from the prior art are optimized in such a way that their function can now be realized with a high level of reliability with a low number of components and a small installation space.

This is achieved in particular in such a way that the release bearing is operatively coupled to the preload spring via a retaining plate, which in turn is in contact with a connecting component, which enables a position determination. The connection component connects the target holder directly to the preload spring. Thus, the invention proposes to arrange for positioning in a slave cylinder a new connecting plate, which is directly connected to the last turn of the preload spring and has a connection to the target holder.

The invention will now be explained in more detail with reference to figures, in which context also different embodiments are explained. These show:

1 a partial longitudinal section of a central release according to the invention with a connecting plate; and

2 a Zentralausrücker with a connecting plate in another embodiment.

The drawings are merely schematic in nature and are for the sole purpose of understanding the invention. The same components are with provided the same reference numerals. The individual reference numbers can be interchanged.

1 shows a Zentralausrücker 1 for a coupling system of a motor vehicle. A release bearing 2 is so with a preload spring 3 Effectively coupled, that an extension movement of the release bearing 2 a compression of the preload spring 3 causes. The off or an opposite retraction of the release bearing 2 is from a sensor detection part 4 registered. For a positionally accurate detection of the axial position of the release bearing 2 and thus the state of a coupling system by the sensor detecting part 4 , is a connection component 5 that with the sensor sensing part 4 connected directly to the preload spring 3 arranged.

To the axial position or the change of the axial position of the release bearing 3 precisely to the sensor detection part 4 pass is because the connecting plate 5 on the preload spring 3 and not at the release bearing 2 Tied, a holding plate 6 interposed. The retaining plate 6 contacted on its one side the release bearing 2 and on its other side the preload spring 3 and is stamped / pulled / made of a thin metal sheet. With regard to its cross-sectional geometry is preferably rotationally symmetrical retaining plate 6 designed so that it is suitable for both the release bearing 2 , as well as for the preload spring 3 provides a sufficiently large contact surface is still sufficiently rigid, so as not to exhibit a delay even after a long-lasting cyclical load and ultimately takes up as little space as possible.

This will ensure that the sensor sensing component 4 passed axial position or the change of the axial position precisely the change in the axial position of the release bearing 2 equivalent.

The connecting plate 5 is over a supernatant section 7 at a winding section 8th the preload spring 3 appropriate. In the in 1 illustrated embodiment is the Überstülpabschnitt 7 designed substantially U-shaped and faces in the direction of the release bearing 2 , The winding section 8th is radially outside of other turns of the preload spring 3 , whereby an optimal use of space is realized.

The connecting plate 5 also has one or more boundary flanges 9 on. These extend in the axial direction and form approximately stops for the preload spring 3 out.

Between the sensor detection part 4 and the preload spring 3 a gap is formed, which depends on the connecting component 5 is bridged. The size of this gap is the field of application of the invention Zentralausrückers 1 dependent.

In 2 is another embodiment of the invention Zentralausrückers 1 shown. The winding section 8th the preload spring 3 that with the connection plate 5 is connected, is formed by two windings, which are arranged at substantially the same axial height, but different radial positions. The release bearing 2 nearest turn of the preload spring 3 is therefore extended and nested radially outward.

The supernatant section 7 of the connection component 5 is configured C-shaped in this embodiment and points radially inward. Thus, the axial position change of the release bearing 2 directly on the preload spring 3 which in turn transfer this axial position change to the connecting plate 5 indicates that the sensor detection component 4 detects the exact position / the exact release state.

LIST OF REFERENCE NUMBERS

1

 CSC

2

 release bearing

3

 preload

4

 Sensor detection part

5

 connecting member

6

 Halteblech

7

 Überstülpabschnitt

8th

 turn section

9

 limit flange

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• EP 1898111 B1 [0002]

Claims (10)

Central disengager ( 1 ) for a clutch system of a motor vehicle, with a releasing bearing ( 2 ) connected to a preload spring ( 3 ), wherein a sensor detection part ( 4 ) is so disengaged bearing fixed, that a position determination of the release bearing ( 2 ) is achievable by detecting a sensor, characterized in that a sensor detecting part ( 4 ) holding connecting component ( 5 ) directly on the preload spring ( 3 ) is attached. Central disengager ( 1 ) according to claim 1, characterized in that the connecting part ( 5 ) is formed as a connecting plate and / or on a winding section ( 8th ) of the preload spring ( 3 ) is positively, positively and / or materially secured. Central disengager ( 1 ) according to one of claims 1 or 2, characterized in that the connecting component ( 5 ) a wire cross-section of the preload spring ( 3 ) surrounds. Central disengager ( 1 ) according to one of claims 2 or 3, characterized in that the winding section ( 8th ) by the release bearing ( 2 ) nearest turn of preload spring ( 3 ) is set. Central disengager ( 1 ) according to one of claims 2 to 4, characterized in that the winding section ( 8th ) Is part of such a turn, which has another turn radially within it. Central disengager ( 1 ) according to one of claims 1 to 5, characterized in that a retaining plate ( 6 ) on the one hand with a Ausrücklagerinnenring the release bearing ( 2 ) and on the other hand with the connecting component ( 5 ) connected is. Central disengager ( 1 ) according to claim 6, characterized in that the holding plate ( 6 ) is formed as a ring. Central disengager ( 1 ) according to one of claims 1 to 7, characterized in that the sensor detection part ( 4 ) on the connecting component ( 5 ) is attached. Central disengager ( 1 ) according to one of claims 1 to 8, characterized in that on the connecting component ( 5 ) at least one axially projecting Begrenzungsflansch ( 9 ) for limiting the radial extent of the preload spring ( 3 ) is available. Central disengager ( 1 ) according to one of claims 2 to 4, characterized in that the release bearing ( 2 ) is designed as a ball bearing.

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