Device for optional engaging and disengaging of a friction clutch for motor vehicles

A device for the optional disengaging and engaging, respectively, of a friction clutch for motor vehicles, with an actuating mechanism in the form of a central disengaging device as a slave cylinder of a hydraulic clutch control, the clutch having an engaging state and a disengaging direction and the central disengaging device being operatively connected with the friction clutch via at least one actuating force transmission member in the form of a release bearing for applying an actuating force, the release bearing being pre-stressed in the disengaging direction by means of a pre-load spring, and there being a sensor device for sensing a variable representative of at least one of the group consisting of the disengaging and engaging state, respectively, of the friction clutch and of the state of wear on the friction clutch with a sensor;

• wherein by means of the sensor the force of the pre-load spring can be sensed as the variable representative of at least one of the group consisting of the disengaging and engaging state, respectively, of the friction clutch and of the state of wear on the friction clutch;
• wherein the pre-load spring is formed as a compression spring, preferably a coil compression spring, and has one end which is supported at the release bearing and has another end which is supported at a housing of the central disengaging device, the sensor being arranged in a flux of force between the pre-load spring and the housing of the central disengaging device;
• and
• wherein a spring plate is provided at the housing-side end of the pre-load spring, via which spring plate the pre-load spring is supported at the housing of the central disengaging device, the sensor being arranged at the spring plate.

A device for the optional disengaging and engaging, respectively, of a friction clutch for motor vehicles, with an actuating mechanism in the form of a central disengaging device as a slave cylinder of a hydraulic clutch control, the clutch having an engaging state and a disengaging direction and the central disengaging device being operatively connected with the friction clutch via at least one actuating force transmission member in the form of a release bearing for applying an actuating force, the release bearing being pre-stressed in the disengaging direction by means of a pre-load spring, and there being a sensor device for sensing a variable representative of at least one of the group consisting of the disengaging and engaging state, respectively, of the friction clutch and of the state of wear on the friction clutch with a sensor;

• wherein by means of the sensor the force of the pre-load spring can be sensed as the variable representative of at least one of the group consisting of the disengaging and engaging state, respectively, of the friction clutch and of the state of wear on the friction clutch;
• wherein the pre-load spring is formed as a compression spring, preferably a coil compression spring, and has one end which is supported at the release bearing and has another end which is supported at a housing of the central disengaging device, the sensor being arranged in a flux of force between the pre-load spring and the housing of the central disengaging device;
• and
• wherein the pre-load spring is supported at three points on a plane surface of the housing of the central disengaging device, wherein an actuating section of the sensor placed on the housing-side end of the pre-load spring forms a bearing section, whilst two further bearing sections are formed by deflections of a last housing-side turn of the pre-load spring, which deflections extend in a direction towards the plane surface of the housing.

A device for the optional disengaging and engaging, respectively, of a friction clutch for motor vehicles, with an actuating mechanism in the form of a central disengaging device as a slave cylinder of a hydraulic clutch control, the clutch having an engaging state and a disengaging direction and the central disengaging device being operatively connected with the friction clutch via at least one actuating force transmission member in the form of a release bearing for applying an actuating force, the release bearing being pre-stressed in the disengaging direction by means of a pre-load spring, and there being a sensor device for sensing a variable representative of at least one of the group consisting of the disengaging and engaging state, respectively, of the friction clutch and of the state of wear on the friction clutch with a sensor;

• wherein by means of the sensor the force of the pre-load spring can be sensed as the variable representative of at least one of the group consisting of the disengaging and engaging state, respectively, of the friction clutch and of the state of wear on the friction clutch;
• wherein the pre-load spring is formed as a compression spring, preferably a coil compression spring, and has one end which is supported at the release bearing and has another end which is supported at a housing of the central disengaging device, the sensor being arranged in a flux of force between the pre-load spring and the housing of the central disengaging device;
• and
• wherein the housing of the central disengaging device has a hole in which the sensor is arranged, a final section of the pre-load spring extending in a direction towards the hole, engages in the hole and abuts the sensor with an actuating effect.