DE102017118309A1 - Force flow-optimized sensor mechanism for measuring distance on a clutch slave cylinder - Google Patents

Abstract

The invention relates to a slave cylinder (1) for a clutch or brake confirmation device of a motor vehicle, comprising:
a housing (2),
a piston (3) slidably received within the housing (2) along an axis (A),
a release bearing (19) connected to the piston (3) and displaceable therefrom,
a sensor device (4) for detecting a position of the release bearing (19), in particular relative to the housing (2),
- wherein the sensor device (4) comprises a sensor housing (5) with a guide (8) for a carrier element (9), wherein the guide (8) is aligned with the axis (A) of the displaceable piston (3),
a support element (9) which connects the release bearing (19) to the guide (8) of the sensor device (4),
- Wherein the carrier element (9) with the release bearing (19) non-displaceably in the direction of the axis (A) of the piston (3) is connected,
- wherein the carrier element (9) by means of at least one guide part (10) along the guide (8) of the sensor housing (5) is designed to be movable,
- wherein the at least one guide part (10) is non-displaceably connected to the carrier element (9) in order to guide the carrier element (9) along the guide (8) for the carrier element (9),
- Wherein the carrier element (9) and the at least one guide part (10) are formed such that they are rotatable relative to the guide (8).
Furthermore, the invention relates to an actuating device for a clutch or a brake of a motor vehicle, with a slave cylinder (1).

Description

The invention relates to a slave cylinder for a clutch or brake confirmation device of a motor vehicle.

Conventionally, slave cylinder, such as. B. clutch slave cylinder, an integrated sensor for measuring distance, with which the relative position of a piston of the slave cylinder can be detected to the housing of the slave cylinder.

So z. B. from the EP 1 898 111 B1 a linear guide of a magnet with a constant distance of the magnet to a sensor element known.

The magnet is connected to a carrier element which displaces the magnet in the linear guide and is arranged on the piston.

The magnet is thus attached via the support member to the piston of the slave cylinder, wherein the magnet is connected axially free of play and radially movable in the linear guide with the clutch slave.

However, the prior art solutions have a relatively high degree of friction, especially with regard to the linear guide.

This leads to the fact that in the course of the use of a slave cylinder, the friction and the associated material wear lead to increased mobility of the magnet within or on the linear guide.

This, in turn, affects the accuracy of the measurement signal from the magnet and the magnetic sensor, although the linear guide of the magnet or sensor is optimally designed without backlash.

It is therefore an object of the present invention to provide a slave cylinder for a clutch or brake confirmation device and an actuator for a clutch or a brake of a motor vehicle, which or which has a mechanical arrangement, in the acting forces on a guide, in particular on a linear guide , for a magnet and / or magnetic sensor and thus friction and wear can be minimized.

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

• - ein Gehäuse,
• - einen Kolben, der innerhalb des Gehäuses entlang einer Achse verschiebbar aufgenommen ist,
• - ein Ausrücklager, das vorzugsweise mit dem Kolben verbunden ist und von diesem verschiebbar ist,
• - eine Sensoreinrichtung zur Erfassung einer Position des Ausrücklagers, insbesondere relativ zum Gehäuse,
• - wobei die Sensoreinrichtung ein Sensorgehäuse mit einer Führung für ein Trägerelement umfasst, wobei die Führung gleichorientiert zur Achse des verschiebbaren Kolbens ausgebildet ist,
• - ein Trägerelement, das vorzugsweise das Ausrücklager mit der Führung verbindet,
• - wobei vorzugsweise das Trägerelement mit dem Ausrücklager verschiebefest in Richtung der Achse des Kolbens verbunden ist,
• - wobei das Trägerelement mithilfe mindestens eines Führungsteils entlang der Führung des Sensorgehäuses verfahrbar ausgebildet ist,
• - wobei das mindestens eine Führungsteil mit dem Trägerelement verschiebefest verbunden ist, um das Trägerelement entlang der Führung für das Trägerelement zu führen.

According to the invention, in a first aspect of the present invention, a slave cylinder for a clutch or brake confirmation device of a motor vehicle comprises:

• a housing,
• a piston slidably received within the housing along an axis,
• a release bearing which is preferably connected to the piston and is displaceable therefrom,
• a sensor device for detecting a position of the release bearing, in particular relative to the housing,
• wherein the sensor device comprises a sensor housing with a guide for a carrier element, wherein the guide is designed to be oriented identically to the axis of the displaceable piston,
• a carrier element which preferably connects the release bearing to the guide,
• wherein preferably the support element is connected to the disengagement bearing displaceable in the direction of the axis of the piston,
• wherein the carrier element is designed to be movable along at least one guide part along the guide of the sensor housing,
• - Wherein the at least one guide member is non-displaceably connected to the support member to guide the support member along the guide for the support member.

Preferably, the carrier element and the at least one guide part are designed such that they are rotatable relative to the guide or relative to the guide for the carrier element. In this way, acting forces on the guide, in particular on a linear guide, the sensor device and thus friction and wear can be minimized.

It should be noted that in the present description by "shift-proof" is understood that z. B. a displacement of the piston or the release bearing is transmitted substantially 1: 1 to the support member, whereby the movement of the piston / the release bearing on the support member is imaged.

Furthermore, it is preferred that the carrier element and the at least one guide part are rotatable about an axis of rotation which deviates from the orientation of the axis of the displaceable piston.

Preferably, the axis of rotation is oriented substantially perpendicular to the axis of the displaceable piston.

Advantageously, the at least one guide part is arranged on the carrier element, in particular attached to the carrier element, preferably integrally formed with the carrier element.

It is also advantageous if the at least one guide part is designed as a pin.

Furthermore, it is favorable if the at least one guide part has a conical shape, a conical shape or a cylindrical shape in order to form a contact line with the guide, so that the friction between guide and guide part can be kept low.

Conveniently, the guide of the sensor housing is rectilinear.

It is also advantageous if the sensor housing of the sensor device comprises a first sensor part, in particular a magnetic field-sensitive sensor.

Furthermore, it is possible for the sensor device to comprise a second sensor part, in particular a magnet.

Preferably, the sensor device comprises a holder for holding the second sensor part.

It is also advantageous if the second sensor part is received in the holder.

Furthermore, it is preferred that the holder is tiltably mounted on the carrier element.

It can also be provided that the holder is attached by means of a rotary joint to the carrier element.

Furthermore, it is preferred that the rotary joint is designed as a ball joint.

Furthermore, it is favorable if the at least one guide part is biased toward the guide of the sensor housing by means of a spring unit under contact with a lateral boundary of the guide.

Advantageously, the spring unit is designed such that it clamps the at least one guide part against the lateral boundary, in particular against a first lateral boundary.

It is also advantageous if the spring unit has a spring which is arranged between a holder of the sensor device for holding a second sensor part and the at least one guide part.

Furthermore, it is favorable if the guide of the sensor housing comprises a first lateral boundary and a second lateral boundary, which are preferably arranged opposite one another.

Preferably, the guide of the sensor housing comprises a third lateral boundary which preferably connects the first and second lateral boundaries.

Furthermore, it is advantageous if the first lateral boundary has a smaller distance to the piston than the second lateral boundary.

Further, it is possible that the guide of the sensor housing comprises a fourth, a fifth and a sixth lateral boundary, which are preferably formed in mirror image to the first, second and third lateral boundary. It is also advantageous if the first and second and preferably third lateral boundaries form a guide section. Advantageously, the fourth and fifth and preferably the sixth lateral boundary likewise form a guiding section. In this way, two opposite guide portions can be created to form a guide and to guide the at least one guide part.

It can also be provided that the holder is non-displaceably coupled to the piston and / or to the release bearing, in particular in the axial direction.

Preferably, the carrier element is connected to the release bearing or to a piston-fixed or release-bearing-fixed component, in particular a spring retaining ring, of the slave cylinder.

Conveniently, the carrier element is connected to a piston-fixed or disengaged bearing component of the slave cylinder or with the release bearing such that the carrier element is fixed relative to the piston-fixed or disengaged bearing component or the release bearing in the radial and axial directions of the piston.

Advantageously, the carrier element is connected to the piston-fixed or disengagement bearing-fixed component or the release bearing via a clip connection.

Furthermore, it is advantageous if the clip connection, the support member and the piston-fixed or disengagement bearing solid component in the radial and axial Set the direction of the piston, and wherein preferably the carrier element is designed to be movable relative to the component or the release bearing in the tangential direction of the piston.

A second aspect of the present invention includes an actuator for a clutch or brake of a motor vehicle.

It is expressly understood that the features of the slave cylinder, as mentioned in the first aspect, individually or in combination with each other can be used in the actuator application.

In other words, the features mentioned above under the first aspect of the invention relating to the slave cylinder can also be combined here with further features in the second aspect of the invention.

Preferably, the actuator for a clutch or a brake of a motor vehicle comprises a slave cylinder as described in the first aspect of the invention.

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

This idea preferably relates - summarized and simplified shown - a slave cylinder with a support member and at least one guide member for guiding the support member in a guide of a sensor housing, wherein the support member and the at least one guide member are formed such that they are rotatable relative to the guide.

In other words, should be designed due to increasing customer requirements with respect to the accuracy of the sensor measurement signal of the piston position relative to a piston housing, the contacts and guides of the sensor for detecting the piston position as possible without play. However, a certain amount of play can not be avoided in conventional designs.

To counteract this problem, larger forces and moments in the guides should preferably be avoided by the mechanical arrangement and mounting of the sensor components. This minimizes friction and wear.

This is conveniently possible by the carrier element or the sensor fork is preferably mounted with pins, in particular only with pins in the axial guidance of the sensor housing. Thus, tilting of the carrier element or the sensor cable does not affect the guide.

Furthermore, it is advantageous if the connection between the piston or a piston-fixed or disengagement bearing-fixed component and the carrier element is fixed in the radial direction.

• 1 eine Schnittansicht auf eine erfindungsgemäße Betätigungseinrichtung für eine Kupplung eines Kraftfahrzeuges mit einem Nehmerzylinder.

The invention will be explained in more detail with reference to an embodiment in conjunction with the accompanying drawings. This shows schematically:

• 1 a sectional view of an actuator according to the invention for a clutch of a motor vehicle with a slave cylinder.

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

1 shows a sectional view of an actuator according to the invention for a clutch of a motor vehicle with a slave cylinder 1 ,

Shown in more detail 1 a slave cylinder 1 with a housing 2 , a piston 3 inside the case 2 along an axis A slidably received, a release bearing 19 that with the piston 3 is connected and displaceable by this, and with a sensor device 4 for detecting a position of the release bearing 19 relative to the housing 2 ,

Here, the sensor device has 4 a sensor housing 5 with a straight-lined leadership 8th for a carrier element 9 , where the leadership 8th equally oriented to the axis A of the displaceable piston 3 is trained.

The sensor housing 5 the sensor device 4 has a first sensor part 6 or a magnetic field-sensitive sensor 6 and a second sensor part 7 or a magnet 7 ,

Furthermore, the sensor device 4 a bracket 11 for holding the second sensor part 7 on, wherein the second sensor part 7 in the holder 11 is included.

The holder 11 is on a support element 9 tiltable mounted, with the bracket 11 by means of a ball joint designed as a swivel joint 12 on the carrier element 9 is appropriate.

Also, the bracket 11 with the release bearing 19 non-slip coupled.

As 1 further shows, the slave cylinder has 1 Further, a carrier element 9 that the release bearing 19 with the second sensor part 7 combines.

Shown in more detail, shows 1 in that the carrier element 9 with a piston-fixed or release bearing fixed component 18 or a spring retaining ring of the slave cylinder 1 connected is.

In this case, the support element 9 with the release bearing fixed component 18 the slave cylinder 1 is connected such that the carrier element 9 relative to the release bearing fixed component 18 in the radial and axial directions R . A of the piston 3 is fixed.

Here is the carrier element 9 with the component 18 connected via a clip connection, wherein the clip connection the carrier element 9 and the release bearing fixed component 18 in the radial and axial directions R . A of the piston 3 set, and wherein the carrier element 9 relative to the release bearing fixed component 18 in tangential direction T of the piston 3 is designed to be movable.

The carrier element 9 is with the release bearing 19 non-slip in the direction of the axis A of the piston 3 connected, wherein the carrier element 9 using a guide part 10 along the guide 8th of the sensor housing 5 is formed movable.

In other words, the guide part 10 doing with the carrier element 9 slidably connected to the carrier element 9 along the guide 8th respectively.

Furthermore, the carrier element 9 and the leadership part 10 designed such that this relative to the guide 8th for the carrier element 9 are rotatable.

In more detail, are the carrier element 9 and the leadership part 10 around a rotation axis Z rotatable relative to each other, that of the orientation of the axis A of the displaceable piston 3 deviates or is the axis of rotation Z essentially perpendicular to the axis A of the displaceable piston 3 oriented, as in 1 shown.

The guide part 10 is on the carrier element 9 attached or can also with the support element 9 be formed in one piece.

Furthermore, the guide part 10 formed as a pin, this or the guide part 10 has a cylindrical shape to match with the guide 8th form a contact line, so that the friction between leadership 8th and leadership part 10 can be kept low.

Also shows 1 that the guide part 10 to the leadership 8th of the sensor housing 5 by means of a spring unit 13 under attachment to a lateral boundary 15 the leadership 8th is biased.

The spring unit 13 has a spring 14 on that between the bracket 11 the sensor device 4 for holding the second sensor part 7 and the leadership part 10 is arranged.

Explained more specifically, the leadership has 8th of the sensor housing 5 a first lateral boundary 15 and a second lateral boundary 16 which are arranged opposite each other.

Also, the leadership points 8th of the sensor housing 5 a third lateral boundary 17 on that the first 15 and second lateral boundary 16 connects with each other.

The first lateral boundary 15 has a smaller distance to the piston 3 as the second lateral boundary 16 ,

Below is 1 again described in other, other words.

So shows 1 in that a spring retaining ring 18 or release bearing fixed component 18 with a sensor cable 9 is clipped, the two components are only tangent to each other. The connection is thus radially and axially linked or fixed.

Furthermore, the sensor fork 9 over side pins 10 in an axial guidance 8th in the sensor housing 5 stored.

The sensor fork 9 can around the pins 10 or rotate around the z-axis and get inside the guide 8th move in y direction.

A feather 13 holds the pins 10 on the inner side of the axial guide 8th , Through this storage of the sensor fork 9 hardly any forces are in the lead 8th this reduces wear and friction.

The magnet carrier 11 or the holder 11 can be around the pins 10 on the sensor fork 9 (around the z axis).

At the same time, the magnetic carrier 11 radially to a hinge 12 be moved.

The feather 13 holds the magnet carrier 11 free of play on a defined curved path.

LIST OF REFERENCE NUMBERS

1

slave cylinder

2

casing

3

piston

4

sensor device

5

sensor housing

6

first sensor part

7

second sensor part

8th

guide

9

support element

10

guide part

11

bracket

12

swivel

13

spring unit

14

feather

15

first lateral boundary

16

second lateral boundary

17

third lateral boundary

18

piston-resistant / release bearing-resistant component

19

release bearing

A

axis of rotation

R

radial direction

T

tangential direction

Z

axis of rotation

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 [0003]

Claims (10)

Slave cylinder (1) for a clutch or brake confirmation device of a motor vehicle, comprising: - a housing (2), - a piston (3) which is slidably received within the housing (2) along an axis (A), - a release bearing ( 19), which is connected to the piston (3) and is displaceable by the latter, - a sensor device (4) for detecting a position of the release bearing (19), in particular relative to the housing (2), - wherein the sensor device (4) a Sensor housing (5) with a guide (8) for a support element (9), wherein the guide (8) is oriented identically to the axis (A) of the displaceable piston (3), - a carrier element (9), the release bearing ( 19) with the guide (8) of the sensor device (4) connects, - wherein the carrier element (9) with the release bearing (19) non-displaceably in the direction of the axis (A) of the piston (3) is connected, - wherein the carrier element (9 ) by means of at least one guide part (10) along d the guide (8) of the sensor housing (5) is designed to be movable, the at least one guide part (10) being non-displaceably connected to the carrier element (9) in order to move the carrier element (9) along the guide (8) for the carrier element (9 ), characterized in that the carrier element (9) and the at least one guide part (10) are formed such that they are rotatable relative to the guide (8). Slave cylinder after Claim 1 in which the support element (9) and the at least one guide part (10) are rotatable about an axis of rotation (Z) which deviates from the orientation of the axis (A) of the displaceable piston (3), - preferably the axis of rotation (Z) is oriented substantially perpendicular to the axis (A) of the displaceable piston (3). Slave cylinder after Claim 1 or 2 - wherein the at least one guide part (10) is arranged on the carrier element (9), in particular on the carrier element (9) is fixed, preferably integrally formed with the carrier element (9), - preferably wherein the at least one guide member (10) as a pin is formed, - preferably wherein the at least one guide member (10) has a conical shape, a conical shape or a cylindrical shape to form a contact line with the guide (8), so that the friction between the guide (8) and guide member (10) kept low can be -, wherein preferably the guide (8) of the sensor housing (5) is rectilinear. Slave cylinder according to one of the preceding claims, - wherein the sensor housing (5) of the sensor device (4) comprises a first sensor part (6), in particular a magnetic field-sensitive sensor, wherein preferably the sensor device (4) comprises a second sensor part (7), in particular a magnet, - wherein preferably the sensor device (4) comprises a holder (11) for holding the second sensor part (7), wherein preferably the second sensor part (7) is received in the holder (11), - Preferably wherein the holder (11) is tiltably mounted on the carrier element (9). Slave cylinder after Claim 4 , - wherein the holder (11) by means of a rotary joint (12) on the carrier element (9) is mounted, - wherein preferably the rotary joint (12) is designed as a ball joint. Slave cylinder according to one of the preceding claims, - wherein the at least one guide part (10) to the guide (8) of the sensor housing (5) by means of a spring unit (13) under contact with a lateral boundary (15, 16) of the guide (8) is biased - wherein preferably the spring unit (13) is designed such that it clamps the at least one guide part (10) against the lateral boundary (15), in particular against a first lateral boundary (15), - wherein preferably the spring unit (13) has a spring (14) which is arranged between a holder (11) of the sensor device (4) for holding a second sensor part (7) and the at least one guide part (10). Slave cylinder according to one of the preceding claims, - wherein the guide (8) of the sensor housing (5) comprises a first lateral boundary (15) and a second lateral boundary (16), which are preferably arranged opposite one another, wherein preferably the guide (8) of the sensor housing (5) comprises a third lateral boundary (17) which preferably connects the first (15) and second lateral boundaries (16), - Preferably wherein the first lateral boundary (15) has a smaller distance from the piston (3) than the second lateral boundary (16). Slave cylinder after one of the Claims 4 to 7 , - wherein the holder (11) with the release bearing (19) is non-displaceably coupled, - wherein preferably the carrier element (9) with the release bearing (19) or with a piston-fixed Component (18), in particular a spring retaining ring, the slave cylinder (1) is connected. Slave cylinder according to one of the preceding claims, - wherein the carrier element (9) with a piston-fixed component (18) of the slave cylinder (1) or with the release bearing (19) is connected such that the carrier element (9) relative to the component (18) or the release bearing (19) in the radial and axial direction (R, A) of the piston (3) is fixed, wherein preferably the carrier element (9) is connected to the piston-fixed component (18) or the release bearing (19) via a clip connection, - wherein preferably the clip connection the carrier element (9) and the piston-fixed component (18) in the radial and axial directions (R, A) of the piston (3) fixed, and wherein the carrier element (9) relative to the piston-fixed component (18) or the Release bearing (19) in the tangential direction (T) of the piston (2) is designed to be movable. Actuating device for a clutch or a brake of a motor vehicle, with a slave cylinder (1) according to at least one of Claims 1 to 9 ,

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