Minebea Company, Limited

Stefan Schwamberger

Martin Engesser

Vladimir Vladimirovich Popov

Guido Schmid

Martin Bauer

Olaf Winterhalter

Thomas Fuss

Jürgen Fleig

Matthias Wildpreth

Bernhard Blocher

Thilo Rehm

Helmut Schneider

Ullrich Kreiensen

Mathias Wildpreth

Igor Ross

Thomas Trietz

Martin Willmer

Daniel Baur

A radiator thermostat () to be fitted onto a radiator valve () is provided. The radiator thermostat () has a transmission element () that transmits a compressive force to the valve pin () of the radiator valve. An electric motor () is provided to drive the transmission element (). The transmission element () is preloaded with a counter force (F) that acts in opposition to the valve force (F) using a spring (). Thus, when moving the transmission element (), the motor () has only to overcome the differential force (df).

Radiator thermostat

The invention relates to a spindle motor having a fluid dynamic bearing system comprising axial and radial bearings that contains a rotor component () which encloses a stationary shaft (), which in turn is connected at both its ends to axially aligned bearing parts () that are fashioned such that they form capillary sealing gaps (), a recirculation channel () filled with bearing fluid that connects the remote regions of the bearing to each other, and an electromagnetic drive system () for driving the rotor component.

Spindle motor having a fluid dynamic bearing system and a stationary shaft

The invention relates to a fluid dynamic bearing pattern that is disposed on at least one bearing surface of the two bearing parts of a fluid dynamic bearing that are moveable with respect to each other along a direction of movement. The bearing pattern comprises two related grooved sections, each section extending at an acute angle with respect to the direction of movement and exerting a defined pumping effect on the bearing fluid found in the bearing when the bearing parts move with respect to each other. According to the invention, the first section is disposed at an angle &#x3b1; and the second section at an angle &#x3b2; with respect to the direction of movement, the two angles varying in size.

Fluid dynamic bearing pattern and fluid dynamic bearing

The invention relates to a magnetic axial bearing for taking up axial forces that act on a rotor component that is rotatably supported about a rotational axis with respect to a stator component. The bearing comprises a first bearing part consisting of at least one permanent magnet and at least two flux guide elements associated with the permanent magnet that are disposed on opposing end faces of the permanent magnet and aligned substantially radial and perpendicular to the rotational axis, and a second bearing part consisting of at least two flux guide elements that are disposed at a mutual spacing to one another and aligned substantially radial and perpendicular to the rotational axis, each flux guide element of the second bearing part being associated with a flux guide element of the first bearing part and lying directly opposite the latter in a radial direction and separated from it by an air gap. The invention further describes a spindle motor having a magnetic axial bearing of this kind, used, for example, for driving a hard disk drive.

Magnetic axial bearing and a spindle motor having this kind of magnetic axial bearing

The invention relates to a fluid dynamic bearing system that comprises at least one stationary part that has a shaft and two bearing plates disposed on the shaft at a mutual spacing, and at least one rotating part that is supported so as to rotate about a rotational axis with respect to the stationary part, and comprises a bearing bush and a sleeve enclosing the bearing bush. A bearing gap filled with bearing fluid is provided between the parts and at least one sealing gap for sealing the bearing gap that extends concentric to the rotational axis. The bearing comprises at least one fluid dynamic radial bearing and two fluid dynamic axial bearings and at least one recirculation channel that connects the two axial bearing regions to each other. According to the invention, the largest radial diameter of the recirculation channel is greater than or equal to the largest diameter of the sealing gap, and the smallest radial diameter of the recirculation channel is greater than or equal to the largest diameter of an adjacent bearing plate. Moreover, additional and effective deairing of the recirculation channel is effected by a venting device. To realize improved equilibrium of pressure in the bearing gap and improved retention of the bearing fluid, the sealing gaps can be inclined, at least in sections, at an angle &#x3b1;, &#x3b2; with respect to the rotational axis, wherein the angles may have different sizes.

Fluid dynamic bearing system

A directly coupled linear drive having a drive unit and a sliding element that are disposed in a frame, the sliding element, actuated by the drive unit, being capable of effecting a movement in a direction of translation with respect to the frame and having a blocking device for blocking the sliding element in the frame in the event of a shock load to the sliding element, the blocking device having a body coupled to the sliding element that absorbs the shock load and is disposed such that the shock load of the body counteracts the shock load of the sliding element.

Linear drive having shock compensation

A fluid dynamic bearing system that has a first bearing part and a second bearing part that is rotatable with respect to the first bearing part, both of which form a bearing gap filled with a bearing fluid between opposing bearing surfaces.

A fluid dynamic bearing system having pressure-generating asymmetric surface patterns, having at least two bearing parts that are rotatable with respect to each other and form a bearing gap filled with a bearing fluid between associated bearing surfaces. The surface patterns are disposed on at least one bearing surface so that hydrodynamic pressure is generated within the bearing gap when the bearing parts rotate with respect to each other. Each surface pattern comprises at least three sections, each section generating a pumping action in a defined direction, and the pumping actions of adjacent sections being substantially aligned in opposite directions. Due to the special geometry of the surface patterns, tolerances in the geometry of the bearing gap have a less significant effect on the pre-defined pumping direction.

Fluid dynamic bearing having pressure-generating surface patterns

The bearing system according to the invention comprises a sleeve-shaped first bearing disk having a bore concentric to a rotational axis, a cylindrical shaft disposed in the bore and connected to the first bearing disk, the shaft having a second bearing disk disposed at one end that is arranged at a spacing to the first bearing disk such that an annular disk-shaped space is formed between the first and the second bearing disk. A third annular bearing disk is provided that is disposed in the annular disk-shaped space and is rotatable about the rotational axis, the opposing surfaces of the first, the second and the third bearing disk as well as the shaft being separated from one another by a bearing gap filled with bearing fluid. A radial bearing is provided between the outside circumference of the shaft and the inside circumference of the third bearing disk and marked by the hydrodynamic bearing patterns associated with the circumferential surfaces. A first axial bearing is provided that is formed by the opposing end faces of the first and the third bearing disk and the hydrodynamic bearing patterns associated with these end faces, and a second axial bearing formed by the opposing end faces of the second and the third bearing disk and the hydrodynamic bearing patterns associated with these end faces.

The invention relates to a spindle motor having a fluid dynamic bearing system and comprises a rotor having a cylindrical shaft, a first bearing disk disposed at one end of the shaft and a second bearing disk that is disposed on the shaft at a spacing to the first bearing disk in such a way that an annular disk-shaped space is formed between the two bearing disks. A stator is provided that has an annular disk-shaped component which is disposed in the annular disk-shaped space formed by the rotor, the respective opposing bearing surfaces of the stator and of the rotor being separated from one another by a bearing gap filled with a fluid medium. The bearing system comprises at least one radial bearing formed between the outside circumference of the shaft and the inside circumference of the annular disk-shaped component and two axial bearings formed by the two end faces of the annular disk-shaped component and the respective opposing end faces of the bearing disks, an electromagnetic drive unit being provided to drive the rotor.

Spindle motor having a fluid dynamic bearing system

The invention relates to a fluid dynamic bearing system that has a stationary sleeve, a stationary shaft disposed in the sleeve and bearing disks disposed on the sleeve and shaft which form an annular disk-shaped space between each other in which an annular disk-shaped component is disposed. A bearing gap filled with a bearing fluid is formed between the stationary and the rotating bearing construction. The bearing system further comprises at least one radial bearing formed between the outer circumference of the shaft and the inner circumference of the annular disk-shaped component, at least two axial bearings formed by the two end faces of the annular disk-shaped component and the first end faces of the bearing disks opposing these; and capillary seals to seal the two open ends of the bearing gap, at least one capillary seal comprising a reservoir that is at least partly filled with bearing fluid and is formed between the surfaces opposing each other of the rotor hub, or a component connected to the rotor hub, and an end face of one of the bearing disks.

The invention relates to a holder for the winding wires for stators of electric motors consisting of a component to be disposed on the stator having means for holding and guiding the winding wires that run between the individual stator windings. According to the invention, the holder is designed as a part of a circuit board for connecting the phase windings.

Holder for winding wires for stators of electric motors

The invention relates to a fluid dynamic air bearing system to rotatably support a motor. The bearing system comprises a stationary shaft, a bearing bush partially enclosing the shaft and connected to the shaft, a bearing plate partially enclosing the shaft and connected to the shaft, the shaft, the bearing bush and the bearing plate between them forming a cavity that is rotationally symmetric with respect to a rotational axis. A component partially enclosing the shaft and having a sleeve-shaped section and at least one disk-shaped section is rotatably accommodated in the cavity, a bearing gap filled with air or a gas separating the surface of the rotatable component from the surfaces facing the rotatable component of the shaft, the bearing bush and the bearing plate. The bearing system further comprises at least one radial bearing formed between the surfaces facing each other of the shaft and of the sleeve-shaped section, at least one radial bearing formed between the surfaces facing each other of the sleeve-shaped section and of the bearing bush, and at least one axial bearing formed between the end surfaces of the disk-shaped section of the rotatable component and the respective surfaces facing these surfaces of the bearing bush and the bearing plate.

Growing community of inventors

Hermsdorf, Germany

Stefan Schwamberger