Suddeutsche Kuhlerfabrik Julius Fr. Behr Gmbh & Co Kg

Sueddeutsche Kuehlerfabrik Julius Fr. Behr Gmbh & Co. Kg

Werner Storz

A fluid friction clutch is provided having an intermediate wall, disposed in a housing and separating the clutch fluid supply or storage space and the clutch fluid working space, with a plurality of overflow openings therein at circumferentially spaced locations. The clutch fluid primarily enters the working space from the storage space through a controllable supply inlet opening in the intermediate wall. The supply inlet is thermostatically controlled by a bi-metal element. A rotating clutch disk is provided in the working space, and at least one clutch fluid return bore is provided in the intermediate wall in the region adjacent the outer circumference of the clutch disk. These return bores provide return guidance for clutch fluid into the storage space.

Fluid friction clutch

The invention relates to a damming arrangement for controlling the return flow of clutch fluid in a fluid friction clutch of the type having a rotatable driving disk disposed to rotate in a work space of a relatively rotatable housing. The work space is separated by an intermediate disk fixed to the housing and a pair of clutch fluid return bores are provided at the periphery of the intermediate disk diametrically opposite one another. To optimize the guidance of the return flow of clutch fluid from the working space to the storage space, damming bodies are disposed adjacent the return bores, which damming bodies include a first guide surface portion extending radially inwardly of the return bores in a diagonal direction corresponding to the rotational direction of the driving disk and a second guide surface portion radially outwardly of the return bore extending diagonally outwardly and opposite of the rotational direction of the driving disk. A connecting guide surface section of the damming body is disposed adjacent the return bore and concentric thereto with a half circular shape open in a direction facing the rotational direction of the driving disk. The damming bodies are supported at the intermediate wall of the clutch housing and protrude inwardly into an outwardly open groove on the driving disk.

The invention provides a baffle arrangement for increasing the return flow pressure for clutch fluid in a fluid friction clutch of the type having a rotatable driving disk disposed to rotate in a work space of a relatively rotatable housing. The work space is separated by an intermediate disk fixed to the housing and clutch fluid return bore means are provided at the periphery of the intermediate disk. In order to prevent wearing of the baffle member and also to accommodate fixation of the baffle member in a minimum thickness clutch construction, the baffle member is supported at the intermediate disk in an oblong hole adjacent to the circumference thereof. The baffle member is guided for movement between respective circumferential end positions in the oblong hole, is axially fixed by a retaining washer or the like to the intermediate disk, and is guided so as to be radially immovable.

A hydraulic coupling which includes a primary coupling part having a pot-shaped pulley or sheave, and a secondary coupling part including a housing provided with a cover. The primary and secondary parts are supported relative to one another in such a manner that they can rotate and the pot-shaped pulley or sheave is located in a working compartment formed in the housing. The working compartment is connected by way of a recycling arrangement, including a bore in the cover, to a supply channel to enable a recycling of the coupling fluid. A circumferential surface of the pulley or sheave is provided with spiral or thread-like grooves. At least one baffle or dam body is provided in order to pump off the coupling fluid from the working compartment. The housing is provided, in an interior thereof, with a circumferentially extending channel having an axial length or width when extends over a portion of a depth or axial length of the pulley or sheave. The channel terminates in an end wall, nearest the cover, in a radial plane in which a forward edge of the pulley or sheave is disposed. The dam or baffle body is located in a recess in the housing in such a manner that a radially inner surface of the body is disposed along a cylindrical inner surface of the housing and extends in an axial direction from an area above the supply chamber to a point above the circumferentially extending channel.

Recycling arrangement for a hydraulic coupling

A fluid clutch composed of a primary part with a drive disc and rotatably mounted relative to a secondary part with a cover is constructed so that the drive disc is disposed in a working chamber formed in the secondary part, the working chamber communicating through a return channel with a supply chamber formed in the secondary part for returning the clutch fluid from the working chamber to the supply chamber by action of a retarder provided in a gap between the circumference of the drive disc and a radial boundary of the working chamber. A control element disposed in a control chamber is displaced axially relative to the drive disc and is located in the secondary part. In accordance with a preferred embodiment, two bores are provided at an angle extending radially and circumferentially relative to the drive disc and control chamber, which bores terminate in the vicinity of the circumferential ends of the retarder in the gap between the drive disc and radial boundary of the working chamber, as well as in the control chamber. Movement of the control element within the control chamber exposes a return channel extending from the control chamber to the supply chamber and alternately exposes and blocks a respective one of the two bores, depending upon the direction of rotation of the drive disc.

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Benningen, Germany

Werner Storz