DE102017111321A1 - Distance measurement on hydraulic clutch slave cylinders with static magnet and integrated Hall sensor - Google Patents

Abstract

The invention relates to a central release device (1) for a hydraulic clutch actuation, comprising:
a housing (2) comprising a cylindrical through-hole (3),
- An annular piston (5) which is arranged in the cylindrical through-bore (3) and axially displaceable,
- A release bearing (6) having an inner (7) and an outer ring (8), wherein the annular piston (5) with the release bearing (6) is operatively connected, so that an axial movement of the annular piston (5) the release bearing (6) axially shifts,
- A sensor device (9) for detecting the axial position of the annular piston (5) relative to the housing (2), wherein the sensor device (9) comprises a magnetic body (10) and a sensor (11), wherein the magnetic body (10) immovable with the housing (2) is connected, and wherein the sensor (11) with the annular piston (5) is connected such that an axial movement of the annular piston (5) the sensor (11) axially relative to the housing (2) shifts.

Description

The invention relates to a Zentralausrücker for a hydraulic clutch actuation with a housing, an annular piston, a release bearing and a sensor device for detecting the axial position of the annular piston relative to the housing.

From the EP 1 898 111 B1 is a Zentralausrücker with a sensor device for detecting the position of an annular piston relative to a separate housing known.

In this case, the sensor device has a sensor and a magnetic body, wherein the magnetic body along its displacement path with a constant distance to the sensor, which is arranged on the separate housing, is displaceably guided.

For this purpose, however, it requires a sensor device or a sensor which is formed over the entire displacement path or the entire stroke of the Zentralausrückers or its annular piston. Such a sensor with appropriate precision is expensive to buy.

It is therefore an object of the present invention to provide a Zentralausrücker for a hydraulic clutch actuation with a sensor device, which is inexpensive to implement and has a simple assembly and which preferably ensures improved precision in terms of detecting the movement of the annular piston.

This object is achieved by the features of the independent claim. Further advantageous developments are the subject of the dependent claims.

• - ein Gehäuse, das eine zylindrische Durchgangsbohrung umfasst,
• - einen Ringkolben, der in der zylindrischen Durchgangsbohrung angeordnet und axial verschiebbar ist, und
• - ein Ausrücklager mit einem Innen- und einem Außenring, wobei vorzugsweise der Ringkolben mit dem Ausrücklager wirkverbunden ist, sodass eine axiale Bewegung des Ringkolbens das Ausrücklager axial bzw. in axialer Richtung verschiebt.

According to the invention, in the present invention, a central release mechanism for a hydraulic clutch actuation comprises the following features:

• a housing comprising a cylindrical through-hole,
• - An annular piston which is arranged in the cylindrical through hole and axially displaceable, and
• - A release bearing with an inner and an outer ring, wherein preferably the annular piston is operatively connected to the release bearing, so that an axial movement of the annular piston, the release bearing moves axially or in the axial direction.

Preferably, the central disengager has a tubular sleeve concentrically disposed within the throughbore. Thus, a pressure chamber for an annular piston between the housing and sleeve can be generated in a simple manner.

Conveniently, one end of the tubular sleeve is arranged on the housing. Thus, the relative position of the sleeve and housing can be accurately set or fixed.

It is also possible that the tubular sleeve and the housing are formed from one part or one piece or one piece. This simplifies the assembly of a central release. In the case of a one-piece design, it is also advantageous if the housing has a plastic as a material, in particular completely formed from plastic.

Preferably, the Zentralausrücker on an annular piston which is disposed between the inner circumferential surface of the through hole and the tubular sleeve and axially displaceable.

It is also advantageous if the central disengager comprises a sensor device for detecting the axial position of the annular piston relative to the housing.

Conveniently, the sensor device comprises a magnetic body and a sensor. It is advantageous if the sensor can detect a relative movement and / or position of the magnetic body to the sensor.

Preferably, the sensor is a so-called Hall sensor. If, for example, a Hall sensor flows through a current and then introduced into a perpendicularly extending magnetic field, it supplies a voltage which is proportional to the product of magnetic flux density and current. This fact is also called Hall Effect.

It is advantageous if the magnetic body is immovably connected to the housing.

Furthermore, it is favorable if the sensor is connected to the annular piston such that an axial movement of the annular piston moves the sensor axially relative to the housing. In this way, it is possible that the sensor due to the relative movement to the magnetic body allows a distance measurement, which suggests the relative positioning of the annular piston to the housing.

Furthermore, it is advantageous if the sensor device has an annular body for entrainment through the annular piston. This annular body preferably represents a connecting link between the annular piston and the sensor device or the sensor.

Preferably, the annular body is arranged on the release bearing, in particular on its inner ring, in order to be likewise displaced during a movement of the annular piston.

Preferably, the ring body is arranged without play on the inner ring. In this way, an axial displacement of the annular body and thus preferably also of the annular piston can be detected exactly by means of a sensor.

Furthermore, it is preferred that the sensor device comprises a holding arm.

The holding arm is conveniently arranged on the annular body and projects beyond the release bearing in the radial direction. The holding arm preferably has the advantage of extending the ring body radially outwards or in the radial direction outwards, in order thus to provide a simple connection for, for example, a sensor on the ring body via the holding arm.

It is advantageous if the holding arm comprises a free end. Preferably, the free end comprises a profile, in particular a dovetail, for guiding in a guide profile, in particular a dovetail guide. Consequently, the free end can be guided, thus avoiding, for example, vibrations which have a negative influence on the exact detection of a position of the annular piston.

Further, it is advantageous if the holding arm comprises a further end, which is preferably arranged on the annular body, in particular fixedly connected to the annular body. In this way, for. B. the annular body and the support arm are integrally formed.

Furthermore, the sensor is advantageously arranged on the holding arm, in particular on the free end of the holding arm. Advantageously, the sensor is attached to the support arm. In this way, the sensor, which is arranged on the support arm, can move with the holding arm. The holding arm, in turn, is preferably connected to the release bearing via the annular body. Thus, therefore, a movement of the annular piston or the release bearing can be detected by the sensor.

Conveniently, the sensor device comprises a magnet housing, on or in which the magnet body is rigidly fastened. Thus, therefore, the magnetic body is immovably fastened to a magnet housing.

Furthermore, it is preferred that the magnet housing is formed integrally with the housing of the central release or is attached to the housing of the Zentralausrückers. In this way, a simple rigid connection of a magnet housing on the housing of the Zentralausrückers is possible.

Preferably, the magnet housing comprises a guide profile, in particular a dovetail guide. The guide profile provides a simple but accurate guide for B. the free end of the support arm realized.

Conveniently, the guide profile extends over the height of the magnet housing. In other words, it is advantageous if the magnet housing has a guide profile along its height. A continuous guide profile is also simple and therefore inexpensive to manufacture.

Furthermore, it is advantageous if the magnetic body comprises a first and a second end.

Conveniently, the magnetic body is rod-shaped, wherein preferably the magnetic body has a straight cylinder as a shape. Such a magnetic body is easy to produce.

It can also be provided that the magnet body has such a length in the axial direction and is secured to or in the magnet housing such that in a first state, in which the central release is in the maximum retracted position, the sensor in the axial direction one end of the Magnetic body opposite. Advantageously, the first end of the magnetic body is opposite to the sensor. Thus, a first generated signal of the sensor is clearly recognizable as such.

Furthermore, it is favorable if, in a second state, in which the central release device is between the maximum retracted position and the maximum extended position, the sensor lies in the axial direction in the center of the magnetic body. In this way it can be ensured that the magnetic body is positioned correctly to the displacement of the Zentralausrückers or its annular piston, and that in each position of the sensor, a signal can be generated.

It is also advantageous if in a third state, in which the central release is in the maximum extended position, the sensor projects beyond one end of the magnetic body in the axial direction. Advantageously, the sensor projects beyond the second end of the magnetic body. In this way, for example, a distinction can be made between the first state and the third state.

Furthermore, it is favorable if the profile of the free end of the holding arm is arranged within the guide profile of the magnet housing in such a way is that the sensor is axially displaceable on the support arm. The displaceability ensures the detection of the relative position between the sensor and the magnet housing or between the annular piston and the housing / magnet housing. It is also ensured in this way that the sensor movably arranged in the guide profile is arranged opposite the magnet housing and thus the magnet body arranged thereon. Thus, the sensor is allowed to detect the magnetic field of the magnetic body.

Preferably, the sensor, in particular in attachment to a free end of a support arm, guided along the guide profile with a constant distance in the radial direction to the magnet body displaceable. A constant distance in the radial direction ensures the exact detection of the movement of the annular piston in the axial direction.

It is also preferred that the profile of the free end of the holding arm in the guide profile of the magnet housing positively, but axially displaceable engages. A positive connection reduces movements in, for example, radial direction, which can generate vibrations that falsify the position detection of the annular piston.

Furthermore, it is preferred that the profile and the guide profile are complementary to each other. Such a configuration allows easy guidance within a guide profile.

Hereinafter, the inventive idea presented above is expressed in other words in addition.

This idea preferably relates - in simplified form - to a central release device with a sensor device, which preferably comprises a sensor and a magnetic body.

Conveniently, the distance of the magnetic body to the sensor via a displacement, along which the sensor is displaceable with the release bearing of the CSC, always consistent. In this case, the sensor is preferably guided and displaced along a linear guide.

It can also be provided that the magnetic body is optionally integrated directly into the housing of the central release or is connected as an add-on component or as a magnetic housing with the housing of the central release either form, force or cohesive.

The formation of the magnetic body directly in the housing of the central release has the advantage that you can save a mounting step (connection magnetic housing to housing the CSC) and also eliminates the tooling costs.

Furthermore, it is advantageous if the sensor device, in particular its sensor, is connected with a cable which is designed to be flexible.

• 1 eine dreidimensionale Ansicht auf einen erfindungsgemäßen Zentralausrücker;
• 2 eine erste Schnittansicht eines Magnetgehäuses des erfindungsgemäßen Zentralausrückers aus 1;
• 3 eine Schnittansicht eines erfindungsgemäßen Zentralausrückers in einem ersten Zustand;
• 4 eine Stadtansicht eines erfindungsgemäßen Zentralausrückers in einem zweiten Zustand; und
• 5 eine Schnittansicht eines erfindungsgemäßen Zentralausrücker Sen einem dritten Zustand.

The invention will be explained in more detail by means of embodiments in conjunction with accompanying drawings. Here are shown schematically:

• 1 a three-dimensional view of a Zentralausrücker invention;
• 2 a first sectional view of a magnet housing of the invention Zentralausrückers from 1 ;
• 3 a sectional view of a central release according to the invention in a first state;
• 4 a city view of a central release according to the invention in a second state; and
• 5 a sectional view of a Zentralausrücker invention Sen a third state.

In the following description, like reference characters will be used for like items.

1 shows a three-dimensional view of a Zentralausrücker invention 1 ,

Shown in more detail 1 a central release 1 for a hydraulic clutch actuation with a housing 2 , a release bearing 6 , a holding arm 13 a ring body 12 , a magnet housing 16 with a guide profile 17 and a complementary trained profile 15 of the support arm 13 ,

2 shows a first sectional view of the magnet housing 16 the central release according to the invention 1 out 1 ,

It can be seen that the section in the axial direction A through the magnet housing 16 of the central release 1 leads.

Further shows 2 that inside the magnet housing 16 a sensor device 9 is arranged, which is a sensor 11 that is included in the leadership profile 17 of the magnet housing 16 to be led. The leadership profile 17 extends in the axial direction A ,

The sensor 11 is with a cable 18 For example, connected to an evaluation unit (not shown).

In a much higher level of detail compared to the 1 and 2 shows 3 a sectional view of a Zentralausrückers invention 1 in a first state.

So is in 3 to realize that the Zentralausrücker 1 for a hydraulic clutch actuation a housing 2 , which has a cylindrical through hole 3 has, includes.

Furthermore, the Zentralausrücker 1 a tubular sleeve 4 that are concentric within the through hole 3 is arranged, wherein one end of the tubular sleeve 4 on the housing 2 is arranged. For completeness, it should be mentioned that the tubular sleeve 4 and the case 2 can also be formed from one piece or in one piece.

Furthermore, the Zentralausrücker 1 an annular piston 5 , between the inner lateral surface IM of the through hole 3 and the tubular sleeve 4 arranged and axially displaceable.

Furthermore, the Zentralausrücker 1 a release bearing 6 with an interior 7 and an outer ring 8th on, with the ring piston 5 with the release bearing 6 is operatively connected, so that an axial movement of the annular piston 5 the release bearing 6 moves axially.

In addition, the Zentralausrücker 1 a sensor device 9 for detecting the axial position of the annular piston 5 relative to the housing 2 ,

The sensor device 9 includes a magnetic body 10 and a sensor 11 , wherein the magnetic body 10 immovable with the housing 2 connected is.

More specifically, the magnetic body is in a magnet housing 16 arranged.

The sensor 11 however, with the ring piston 5 connected such that a movement in the axial direction A or an axial movement of the annular piston 5 the sensor 11 axially relative to the housing 2 as well as to the magnet housing 16 shifts.

Furthermore, the sensor device has 9 a ring body 12 for driving through the ring piston 5 , wherein the ring body 12 at the release bearing 6 or on its inner ring 7 is attached. This will cause the ring body 12 during a movement of the annular piston 5 or the release bearing 6 also moved.

So that the ring body 12 exactly the movements of the release bearing 6 imitates, is the ring body 12 clearance on the inner ring 7 arranged.

Further shows 3 in that the sensor device 9 a holding arm 13 has that on the ring body 12 is arranged and in the radial direction R the release bearing 6 surmounted.

Here, the holding arm 13 a free end 14 on, that's a profile 15 in the form of a dovetail for guidance in the guide profile 17 has, with the leadership profile 17 the shape of a dovetail guide comprises. In other words, the profile 15 and the leadership profile 17 formed complementary to each other.

Further, the sensor 11 on the support arm 13 or its free end 14 arranged.

The profile 15 the free end 14 of the support arm 13 is within the leadership profile 17 of the magnet housing 16 arranged such that the sensor 11 on the support arm 13 is axially displaceable.

Due to the arrangement of the profile 15 of the support arm 13 in the leadership profile 17 is the sensor 11 along the guide profile 17 with a constant distance in the radial direction R to the magnetic body 10 slidably guided.

The profile takes effect 15 the free end 14 of the support arm 13 in the leadership profile 17 of the magnet housing 16 positive fit, but axially displaceable.

As already mentioned, the sensor device has 9 a magnet housing 16 , on or in which the magnetic body 10 is rigidly attached.

In the present embodiment, the magnet housing 16 on the housing 2 of the central release 1 by means of screws (cf. 1 ) attached.

Alternatively, it is also possible that the magnet housing 16 in one piece with the housing 2 of the central release 1 is trained.

As already indicated, the magnet housing has 16 a leadership profile 17 in the form of a dovetail guide and extends in the axial direction A over the height of the magnet housing 16 ,

Further shows 3 that the magnetic body 10 a first 10A and a second end 10B includes, wherein the magnetic body 10 rod-shaped (cf. 1 ) is trained.

As already mentioned, shows 3 the central release 1 in a first state.

In this case, the magnetic body 10 such a length in the axial direction A and is so on the magnet housing 16 attached that in this first state, in which the central release 1 in the maximum retracted position is the sensor 11 in the axial direction A the free end 10A of the magnetic body 10 opposite.

4 shows a sectional view of a central release according to the invention 1 in a second state.

Regarding the further remarks, in order to avoid unnecessary repetition, reference is made to the explanations 3 referenced, which are analogously applicable here.

Therefore, below only the differences between 3 and 4 received.

As mentioned, shows 4 the central release 1 in a second state in which the Zentralausrücker 1 between the maximum retracted position and the maximum extended position, wherein the sensor 11 in the axial direction A the magnetic body 10 centered opposite.

5 shows a sectional view of a central release according to the invention 1 in a third state.

Regarding the further remarks, in order to avoid unnecessary repetition, reference is made to the explanations 3 referenced, which are analogously applicable here.

Therefore, below only the differences between 3 and 5 received.

In the third state, in which the Zentralausrücker 1 is in the maximum extended position, the sensor surmounted 11 the second end 10B of the magnetic body 10 in the axial direction A ,

LIST OF REFERENCE NUMBERS

1

CSC

2

casing

3

Through Hole

4

tubular sleeve

5

annular piston

6

release bearing

7

inner ring

8th

outer ring

9

sensor device

10

magnetic body

10A

first end of the magnetic body

10B

second end of the magnetic body

11

sensor

12

ring body

13

holding arm

14

free end of the support arm

15

profile

16

magnet housing

17

guide profile

18

electric wire

A

axial direction

R

radial direction

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 (9)

Central release device (1) for a hydraulic clutch actuation, comprising: a housing (2) comprising a cylindrical through-hole (3), an annular piston (5) which is arranged in the cylindrical through-bore (3) and axially displaceable, a release bearing (6) having an inner (7) and an outer ring (8), - wherein the annular piston (5) is operatively connected to the release bearing (6) so that an axial movement of the annular piston (5) axially displaces the release bearing (6), a sensor device (9) for detecting the axial position of the annular piston (5) relative to the housing (2), - wherein the sensor device (9) comprises a magnetic body (10) and a sensor (11), - Wherein the magnetic body (10) is immovably connected to the housing (2), and - wherein the sensor (11) with the annular piston (5) is connected such that an axial movement of the annular piston (5) the sensor (11) axially relative to the housing (2) shifts. Zentralausrücker after Claim 1 , - wherein the sensor device (9) has an annular body (12) for entrainment by the annular piston (5), - wherein preferably the annular body (12) on the release bearing (6), in particular on its inner ring (7) is arranged to in a movement of the annular piston (5) also to be moved, - wherein preferably the annular body (12) without play on the inner ring (7) is arranged. Zentralausrücker after Claim 1 or 2 - wherein the sensor device (9) comprises a holding arm (13), - wherein preferably the holding arm (13) is arranged on the annular body (12) and in the radial direction (R) projects beyond the release bearing (6), - preferably the holding arm ( 13) comprises a free end (14), wherein preferably the free end (14) comprises a profile (15), in particular a dovetail, for guiding in a guide profile (17), in particular a dovetail guide, wherein preferably on the holding arm (13) the sensor (11) is arranged. Zentralausrücker according to any one of the preceding claims, - wherein the sensor device (9) comprises a magnet housing (16) to which the magnet body (10) is rigidly fastened, wherein preferably the magnet housing (16) is formed integrally with the housing (2) of the central release device (1) or is fastened to the housing (2) of the central release device (1), - wherein preferably the magnet housing (16) comprises a guide profile (17), in particular a dovetail guide, - Preferably, the guide profile (17) extends over the height of the magnet housing (16). Zentralausrücker according to any one of the preceding claims, - wherein the magnetic body (10) comprises a first (10A) and a second end (10B), - wherein preferably the magnetic body (10) is rod-shaped, - Preferably wherein the magnetic body (10) has a straight cylinder as a shape. Zentralausrücker according to any one of the preceding claims, - Wherein the magnetic body (10) has such a length in the axial direction (A) and is fixed to the magnet housing (16), that in a first state, in which the Zentralausrücker (1) in the maximum retracted position, the sensor (11) in the axial direction (A) opposite to an end (10A) of the magnetic body (10). Zentralausrücker according to any one of the preceding claims, - In a second state, in which the Zentralausrücker (1) between the maximum retracted position and the maximum extended position, the sensor (11) in the axial direction (A) of the magnetic body (10) is located centrally opposite. Zentralausrücker according to any one of the preceding claims, - In a third state in which the Zentralausrücker (1) in the maximum extended position, the sensor (11) one end (10 B) of the magnetic body (10) projects beyond in the axial direction (A). Central release device according to one of the preceding claims, - wherein the profile (15) of the free end (14) of the holding arm (13) within the guide profile (17) of the magnet housing (16) is arranged such that the sensor (11) on the holding arm (13 ) is axially displaceable, - wherein preferably the sensor (11) along the guide profile (17) with a constant distance in the radial direction (R) to the magnetic body (10) is displaceably guided, wherein preferably the profile (15) of the free end (14) of the support arm (13) in the guide profile (17) of the magnet housing (16) positively but axially displaceably engages, - preferably wherein the profile (15) and the guide profile (17) to each other are formed complementary.

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