DE102016221561A1 - Clutch slave cylinder - Google Patents

Abstract

The present invention relates to a clutch slave cylinder (16) for a hydraulic clutch system, comprising a cylinder housing (32) with an axially displaceable in a cylinder annular piston for actuating a clutch disc, further comprising a sensor (14) for detecting the axial position of the annular piston, wherein the sensor (14) comprises an external sensor cable (12), wherein the clutch slave cylinder (16) has a screw connection (30) or a rivet connection to which a cable support (10) is fixed which receives the sensor cable (12).

Description

The present invention relates to a clutch slave cylinder with an improved attachment of a sensor cable.

Clutch slave cylinders are widely known and serve, actuated by a clutch master cylinder, to actuate a clutch via a release or engagement system. In this case, often lines, such as hydraulic lines to be fixed to the clutch slave cylinder.

From the document WO 2015/149772 A1 In this regard, a holding device is known for attaching at least one fluid line to a first shell and a second shell, wherein the first shell and the second shell are contiguous and connectable to each other, wherein in at least one of the shells or in both shells recesses are provided form a channel when the two shells are applied to each other, in which a fluid line can be inserted, wherein locking means are provided on the shells, for locking the two shells and wherein fastening means are provided for fastening the holding device. As a result, by inserting the fluid lines into the recesses and connecting the shells, a simple and defined arrangement of the fluid lines in the motor vehicle can be achieved.

DE 2015 210 471 A1 describes a fastening device, in particular for pressure-medium-carrying lines in motor vehicles, with a fastening element which has at least one attachable to a supporting structure / body holding portion and at least one line at least partially embracing mounting portion, wherein within the mounting portion of the vibration and / or noise reduction serving damping element is arranged.

DE 10 2009 013 999 A1 describes a hydraulic actuating device, in particular clutch actuating device, with a slave cylinder, in which a piston is received translationally reciprocate, a the slave cylinder and the piston fluidly associated connector body, to which a connection counterpart for a line end can be connected. In this case, the connection body has a sliding fit, on which a securing part can be pushed to fix the connection counterpart.

In order to be able to detect the position of the clutch disc and thus be able to close the wear state of the clutch, for example, sensor systems are often provided which can detect, for example, the position of an actuating piston in the clutch slave cylinder. In this regard, it is necessary to fix electrical cables for connecting the sensor to the clutch slave cylinder. For this purpose, it is known to use cable ties.

However, such solutions can still offer room for improvement.

It is therefore the object of the present invention to provide a measure with which at least one disadvantage of the prior art can be at least partially eliminated. It is in particular the object of the present invention to provide a solution by which a cable of a sensor for a clutch slave cylinder can be fixed in a simple and secure manner.

The object is achieved according to the invention by a clutch slave cylinder with the features of claim 1. Preferred embodiments of the invention are specified in the subclaims, in the description or the figures, with further features described or shown in the subclaims or in the description or the figures individually or in any combination may constitute an object of the invention unless the context clearly dictates otherwise.

It is proposed a clutch slave cylinder for a hydraulic clutch system, comprising a cylinder housing with an axially movable in a cylinder annular piston for actuating a clutch disc, wherein a sensor for detecting the axial position of the annular piston is also provided, wherein the sensor comprises an external sensor cable, said Clutch slave cylinder has a screw connection or a riveted joint to which a cable holder is fixed, which receives the sensor cable.

By an above-described clutch slave cylinder, which can be designed in particular as a centric clutch slave cylinder (CSC, Clutch Slave Cylinder) and can serve for a Kupplungsausrück- or Kupplungseinrücksystem, it is possible that an external sensor cable is fixed in a particularly secure manner to the clutch slave cylinder. In this case, an external sensor cable can be understood to mean such a cable which is not arranged in the sensor housing but serves for external connection of the sensor, for example for picking up data determined by the sensor. As a result, it can be safely prevented that the sensor cable comes into contact with the clutch during use, for example, which could damage or even sever the sensor cable.

The proposed solution is particularly advantageous over solutions used in the prior art, according to which the sensor cable was fixed by means of a cable tie or a loose cable clamp, which was fixed in particular after arranging the sensor cable to the clutch slave cylinder or the connector to the corresponding components and the sensor cable so fixed.

Due to the fact that the clutch slave cylinder has a screw connection or a rivet connection to which a cable holder, in particular made of a plastic, is fixed, which accommodates the sensor cable, the cable holder can be made possible without complicated structural changes, since the cable holder attaches to a screw connection or rivet connection which is present in any case can be fixed. Thus, both a simple implementation in the production and a simple retrofitting can be made possible.

For this purpose, the cable holder, for example, have a first fixing region, with which the cable holder is fixed to the screw. The first fixing region may, for example, have an opening for passing through the screw or the rivet and thus be fixed in a simple manner by the screw connection or riveted connection.

Furthermore, a second fixing region can be provided, on which the sensor cable is fixed or which receives the sensor cable. This can basically be configured arbitrarily, as far as the sensor cable can be securely fixed.

It may further be preferred that the cable holder is designed as a clamp. In this embodiment, the cable holder can be produced inexpensively. In addition, in particular a clamp allow easy recording or fixing of the sensor cable, further, a secure and reliable fixation of the sensor cable may be possible. Thus, it can be particularly reliably prevented that with a mechanical force on the sensor cable this moves or releases from the terminal. This can ensure that the sensor cable is correctly positioned and does not shift substantially, which can prevent damage to the clutch system.

In addition, it may be advantageous if the terminal has an annular receiving space in which the sensor cable is fixed by a snap connection. For example, the clamp may have a part-ring-shaped holding area for holding the sensor cable, which is elastic such that the sensor cable can be clipped into the cable holder. This embodiment allows a particularly simple and stable fixation of the sensor cable. In addition, the clamp can be particularly easily formed, so that a simple production can be combined with a simple operation.

It may also be preferred that the screw connection or rivet connection of the fixation of the sensor is used in particular on the cylinder housing. In this embodiment, the sensor cable can be fixed adjacent to the sensor, which can bring advantages in terms of fixation with it.

• 1 eine schematische Ansicht einer Kabelhalterung für ein externes Sensorkabel;
• 2 eine weitere schematische Ansicht der Kabelhalterung aus 1;
• 3 eine schematische Ansicht eines Kupplungsnehmerzylinders mit einer Kabelhalterung gemäß 1; und
• 4 eine weitere schematische Ansicht des Kupplungsnehmerzylinders mit einer Kabelhalterung gemäß 1.

In the following, a particularly preferred embodiment of the invention will be explained with reference to the accompanying drawings, wherein it is explicitly pointed out that the object according to the invention is not limited to the embodiment described. Show it:

• 1 a schematic view of a cable holder for an external sensor cable;
• 2 another schematic view of the cable holder 1 ;
• 3 a schematic view of a clutch slave cylinder with a cable holder according to 1 ; and
• 4 a further schematic view of the clutch slave cylinder with a cable holder according to 1 ,

In the 1 and 2 is a cable holder 10 for fixing an external sensor cable 12 for a sensor 14 a clutch slave cylinder 16 shown. The cable holder 10 has a first fixing area 18 on, the one opening 20 includes for receiving a screw or rivet. It is also a second fixation area 22 provided, which a part-annular retaining element 24 and one of the holding member 24 limited recording area 26 for picking up the sensor cable 12 having. In doing so, the sensor cable 12 by an elastic deformability of the holding element 24 through an opening 28 in the recording area 24 be pushed and fixed by a snap connection.

In the 3 and 4 is shown that the cable holder 10 on the clutch slave cylinder 16 is fixed. It can be seen in detail that a screw 30 for fixing the sensor to a cylinder housing 32 the clutch slave cylinder 16 is provided, which is the cable holder 10 fixed.

LIST OF REFERENCE NUMBERS

10

cable holder

12

sensor cable

14

sensor

16

Clutch slave cylinder

18

first fixation area

20

opening

22

second fixation area

24

retaining element

26

reception area

28

opening

30

screw

32

cylinder housing

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

• WO 2015/149772 A1 [0003]
• DE 2015210471 A1 [0004]
• DE 102009013999 A1 [0005]

Claims (4)

Clutch slave cylinder for a hydraulic clutch system, comprising a cylinder housing (32) with an axially movable in a cylinder annular piston for actuating a clutch disc, further comprising a sensor (14) for detecting the axial position of the annular piston, wherein the sensor (14) an external Sensor cable (12), characterized in that the clutch slave cylinder (16) has a screw connection (30) or a riveted joint to which a cable holder (10) is fixed, which receives the sensor cable (12). Clutch slave cylinder after Claim 1 , characterized in that the cable holder (10) is designed as a terminal. Clutch slave cylinder after Claim 2 , characterized in that the clamp has an annular receiving space (26) in which the sensor cable (12) is fixed by a snap connection. Clutch slave cylinder after Claim 1 or 2 , characterized in that screw connection (30) or rivet connection of the fixation of the sensor (14) in particular on the cylinder housing (32) is used.

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