A device for polishing an optical surface of lenses, a connecting element for being fitted on a polishing machine on one end of the device, and a polishing wheel on another end, the polishing wheel having an axially disposed drive shaft running radially to a longitudinal center axis of a spindle, the device having a crown or bevel gear by which the polishing wheel is drivable via the drive shaft by a rotary spindle part, the crown or bevel gear formed by a cogwheel disposed on one end of the drive shaft and by a crown or bevel wheel rotatably mounted on a fixed bearing sleeve running coaxially to the spindle of the polishing machine, an additional toothing on an outer circumference of the crown or bevel wheel for driving the polishing wheel via the drive shaft via a toothed wheel driven by a separate drive motor.

A device for polishing an optical surface of lenses, a connecting element for being fitted on a polishing machine on one end of the device, and a polishing wheel on another end, the polishing wheel having an axially disposed drive shaft running radially to a longitudinal center axis of a spindle, the device having a crown or bevel gear by which the polishing wheel is drivable via the drive shaft by a rotary spindle part, the crown or bevel gear formed by a cogwheel disposed on one end of the drive shaft and by a crown or bevel wheel rotatably mounted on a fixed bearing sleeve running coaxially to the spindle of the polishing machine, an additional toothing on an outer circumference of the crown or bevel wheel for driving the polishing wheel via the drive shaft via a toothed wheel driven by a separate drive motor.

There is disclosed a polishing cleaning mechanism configured to be in contact with a rear surface of a substrate which is held in a substrate holding unit for holding the rear surface of the substrate and perform a polishing process and a cleaning process on the rear surface of the substrate, including a cleaning member configured to clean the rear surface of the substrate, a polishing member configured to polish the rear surface of the substrate, and a support member configured to support the polishing member and the cleaning member to face the rear surface of the substrate held in the substrate holding unit, wherein a surface of the polishing member facing the substrate and a surface of the cleaning member facing the substrate differ in relative height from each other.

There is disclosed a polishing cleaning mechanism configured to be in contact with a rear surface of a substrate which is held in a substrate holding unit for holding the rear surface of the substrate and perform a polishing process and a cleaning process on the rear surface of the substrate, including a cleaning member configured to clean the rear surface of the substrate, a polishing member configured to polish the rear surface of the substrate, and a support member configured to support the polishing member and the cleaning member to face the rear surface of the substrate held in the substrate holding unit, wherein a surface of the polishing member facing the substrate and a surface of the cleaning member facing the substrate differ in relative height from each other.

There is disclosed a polishing cleaning mechanism configured to be in contact with a rear surface of a substrate which is held in a substrate holding unit for holding the rear surface of the substrate and perform a polishing process and a cleaning process on the rear surface of the substrate, including a cleaning member configured to clean the rear surface of the substrate, a polishing member configured to polish the rear surface of the substrate, and a support member configured to support the polishing member and the cleaning member to face the rear surface of the substrate held in the substrate holding unit, wherein a surface of the polishing member facing the substrate and a surface of the cleaning member facing the substrate differ in relative height from each other.

An oscillatory driving device for a hand-held power tool includes at least one input shaft, at least one output shaft, and at least one gearing unit. The gearing unit operatively connects the input shaft to the output shaft and includes at least one eccentric element configured to drive the output shaft in an oscillatory manner. The gearing unit includes at least one further eccentric element configured to drive the output shaft in an oscillatory manner.

An oscillatory driving device for a hand-held power tool includes at least one input shaft, at least one output shaft, and at least one gearing unit. The gearing unit operatively connects the input shaft to the output shaft and includes at least one eccentric element configured to drive the output shaft in an oscillatory manner. The gearing unit includes at least one further eccentric element configured to drive the output shaft in an oscillatory manner.

An oscillating drive for a power tool includes a wobble shaft located on a drive shaft of a motor for a power tool, and a wobble member rotatably supported on the wobble shaft. The wobble member includes a wobble drive structure that defines a drive axis. A tool driver includes a tool drive structure at one end that is coupled to the wobble drive structure and a tool holder configured to releasably retain an accessory tool. Rotation of the drive shaft causes the wobble shaft to wobble about an axis of the drive shaft. The tool driver holds the wobble member against the rotation of the wobble shaft such that the wobble member wobbles without rotating which results in an oscillating motion of the drive axis of the wobble member in a plane that is parallel to the axis of the drive shaft. The oscillating motion of the drive axis causes the tool driver to oscillate.

An oscillating drive for a power tool includes a wobble shaft located on a drive shaft of a motor for a power tool, and a wobble member rotatably supported on the wobble shaft. The wobble member includes a wobble drive structure that defines a drive axis. A tool driver includes a tool drive structure at one end that is coupled to the wobble drive structure and a tool holder configured to releasably retain an accessory tool. Rotation of the drive shaft causes the wobble shaft to wobble about an axis of the drive shaft. The tool driver holds the wobble member against the rotation of the wobble shaft such that the wobble member wobbles without rotating which results in an oscillating motion of the drive axis of the wobble member in a plane that is parallel to the axis of the drive shaft. The oscillating motion of the drive axis causes the tool driver to oscillate.

A polishing and/or sanding head 1 has a frame and three discs movably coupled to the frame. Of these discs, a first disc 5 forms a round inner disc and a second disc 7 is annular and surrounding the first disc. These first and second discs are concentric and rotatable in opposite directions about their common center. The third disc 9 is also annular and is present around the second disc. This third disc is not rotatable but can make a circular movement about an imaginary axis. The discs are provided with a front side 5A-9A, which faces the surface to be treated during operation and on which a polishing or sanding sheet can be applied. Due to the presence of this third disc, which does not make a rotating but an eccentric movement, an even surface is obtained during polishing or sanding, on which no areas with a deviating appearance are present.