Andreas Stihl Ag & Co.

Andreas Stihl

Other

Joachim Kottke

Gerhard Zerrer

Joachim Hoffmann

Reinhard Friedrich

Dieter Angstenberger

Thomas Schweigert

Erich Muller

Erik Ames

Martin W&ouml;hrle

Friedel Kordowich

A gearbox head is provided for a motor-driven, manually guided implement for driving a cutting tool. The gearbox head includes a housing having a planetary gear arrangement, preferably a bevel gearing. At least one gear of the planetary gear arrangement is fixedly disposed on a shaft that, for venting the housing, is provided with a channel that opens out beyond the housing via an outer opening and opens out into an interior of the housing via at least one inner opening, which is formed by at least one portion of the channel that extends essentially radially relative to the longitudinal axis of the shaft.

Gearbox head

An anti-friction bearing, especially for supporting a shaft ( ) of a gear case ( ), is provided for a portable handheld work apparatus. The anti-friction bearing has an inner race ( ) and an outer race ( ) surrounding the inner race ( ) at a radial distance ( ). Roller elements ( ) are arranged between the outer race ( ) and the inner race ( ). A cover disc ( ) is provided at the anti-friction bearing ( ) in order to prevent a passage of lubricant ( ) through the anti-friction bearing ( ). The cover disc ( ) extends radially from the inner race ( ) to an inner edge ( ) of the outer race ( ). The inner edge ( ) faces axially toward the roller elements ( ). A narrow radial gap ( ) is provided between the cover disc ( ) and the inner edge ( ). The axial elevation ( ) of a radial outer edge ( ) of the cover disc ( ) is equal to or less than the axial elevation ( ) of the inner edge ( ). The cover disc ( ) is connected seal-tight to the inner race ( ) and functions, during rotational operation of the anti-friction bearing, to throw off via centrifugal force lubricant striking the cover disc ( ). In this way, a passage of lubricant through the anti-friction bearing ( ) from the gear case is prevented.

Anti-friction bearing

The invention relates to a portable handheld work apparatus having a movable control element ( ) for influencing the operation of the work apparatus. The work apparatus includes an actuable positioning element ( ) and a Bowden cable ( ) connecting the positioning element ( ) and the control element ( ). The Bowden cable ( ) includes a Bowden cable casing ( ) and a wire ( ) guided in the casing ( ) so as to be axially movable. The Bowden cable casing ( ) is held at its two ends ( ) in support locations ( ) with respective longitudinal stops ( ). The support locations ( ) are fixed with respect to the apparatus. An adjusting device ( ) is provided between the ends ( ) of the Bowden cable sleeve ( ) and the corresponding support locations ( ). The adjusting device ( ) has a holding element ( ) which holds the end ( ) and is fixed to the support location. The holding element ( ) can be loosened to axially displace the ends ( ).

Method for adjusting the idle position of a throttle pull

A securing mechanism for securing a drive shaft of a rotating tool member of a working tool against rotation includes a securing member fixedly connected to the drive shaft. The securing member has at least one engagement opening. A lock bolt for engaging the at least one engagement opening is provided. The lock bolt is axially displaceably positioned in the housing of the working tool. A spring for biasing the lock bolt into engagement with the at least one engagement opening is provided. An actuating element for displacing the lock bolt from an engaged position, in which the lock bolt engages the at least one engagement opening, into a disengaged position, in which the lock bolt is removed from the engagement opening, is provided. The actuator element is positioned adjacent to the lock bolt and has a cam member extending into the travel path of the lock bolt. The cam member has a securing position in which the cam member is locked at the housing for securing the lock bolt against the force of the spring in the disengaged position.

Securing mechanism for securing a drive shaft of a rotating tool member

The invention relates to a cutterhead for vegetation cutter apparatus and has as its object to configure the cutterhead so that the cutterhead as a unit can be built so as to be overall constructively small and reduce wear. The cutterhead controls the spool having the filament with the aid of a latching lever. To achieve an overall construction which is small and subjected to less wear, the invention provides at least one pivot lug fixedly mounted on the housing having its latching lever arranged in an annular space lying concentric to the rotational axis between the hub of the cutterhead and the switching cams corresponding to the filament spool. These switching cams lie in the outer radial region of the spool.

Cutterhead for a vegetation cutter apparatus

A locking device is disclosed to prevent a rotatably journalled part of a portable tool from rotating. The locking device includes a blocking element which coacts with the rotatably journalled part for blocking the rotation thereof. The blocking element is disposed on the tool and can be shifted from a clear position permitting rotation into a blocking position preventing rotation. In the latter position, the blocking element is braced against the tool. Thus, the blocking element is always present on the tool and is available for use at any time. The blocking element does not need to be held manually in the blocking position because it is supported on the tool.

Rotation-preventing locking device for a portable tool

A mount for a holding structure of a free-cutting device having two clamping members which respectively include a depression for receiving a mount member of the holding structure, while at least one of the clamping members is provided with a receiving surface extending transverse to the depression for receiving a supporting tube of the free-cutting device. The at least one of the clamping members is provided with screw bolts guided in passages of the two clamping members by means of which the mount portion for the holding structure is clamped fast between the two clamping members. The receiving part for the supporting tube and the depressions for the mounting part for the supporting tube are located at different heights. The depressions confine at least partly a passage which extends over the entire length of the two clamping parts for the bearing part. At least four screw bolts are provided which received in pairs are located on both sides of the receiving surface in said clamping pieces, while the openings have thread-free passages for the screw bolts.

Mount for a holding structure of a free-cutting device

A handle for free-cutting devices which includes a handle member provided with holding elements, a clamping device for detachably connecting the handle member to the handle, and a carrier for a shank carrying the cutting tool of the free-cutting device. The clamping device is arranged on the carrier. At least one portion of the clamping device together with the handle member is pivotable relative to the carrier and is arrestable in at least two positions.

Growing community of inventors

Remseck, Germany

Joachim Kottke