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US 9,776,316 B2Granted
Machine tool, in particular handheld machine tool
AssigneeRobert Bosch GmbH
InventorsJoachim Hecht, Heiko Roehm, Martin Kraus
Life of this patent
Estimating the term…
Abstract
A power tool, in particular a hand-held power tool, preferably embodied as a cordless screwdriver, is equipped with a torque limiting unit in which the release torque is settable by way of a locking brace that is equipped with a spring brace for locking elements that abut axially against parts of a planetary drive, in particular the ring gear thereof or the planet carrier thereof as a last gear stage, the spring elements of the spring brace and the locking elements being located with a radial offset from one another.
Claims23
A power tool, comprising:
- a tool spindle including a drive;
- and
- a torque limiting unit disposed in the drive of the tool spindle and received in a housing, the torque limiting unit including
- locking elements configured to disengage the drive when a release torque is exceeded,
- an axial locking brace comprising at least one spring brace exerting a spring force on the locking elements, the at least one spring brace including a plurality of spring elements, and
- a support member bracing the axial locking brace with respect to the housing, the support member being displaceable in an axial direction with respect to the housing in order to adjust and set the release torque,
- wherein the locking elements and the plurality of spring elements of the spring brace are radially offset from each other,
- wherein the plurality of spring elements of the spring brace are braced with respect to the radially offset locking elements via a spanning member,
- wherein the spanning member is embodied as a spring carrier having limbs extending radially between the plurality of spring elements and the locking elements.
6 more elements
A power tool, comprising:
- a tool spindle including a drive;
- and
- a torque limiting unit disposed in the drive of the tool spindle and received in a housing, the torque limiting unit including
- locking elements configured to disengage the drive when a release torque is exceeded,
- an axial locking brace comprising at least one spring brace exerting a spring force on the locking elements, the at least one spring brace including a plurality of spring elements, and
- a support member bracing the axial locking brace with respect to the housing, the support member being displaceable in an axial direction with respect to the housing in order to adjust and set the release torque,
- wherein the locking elements and the plurality of spring elements of the spring brace are radially offset from each other,
- wherein the plurality of spring elements of the spring brace are braced with respect to the radially offset locking elements via a spanning member,
- wherein the spanning member is embodied as a spring carrier including at least one axially extending spring support configured to support the plurality of spring elements on a first end and at least one radially inwardly extending supporting limb configured to support the locking elements.
6 more elements
A power tool, comprising:
- a tool spindle including a drive;
- and
- a torque limiting unit disposed in the drive of the tool spindle and received in a housing, the torque limiting unit including
- locking elements configured to disengage the drive when a release torque is exceeded,
- an axial locking brace comprising at least one spring brace exerting a spring force on the locking elements, the at least one spring brace including at least one spring element, and
- a support member bracing the axial locking brace with respect to the housing, the support member being displaceable in an axial direction with respect to the housing in order to adjust and set the release torque,
- wherein the locking elements and the at least one spring element of the spring brace are radially offset from each other,
- wherein the at least one spring element of the spring brace is braced with respect to the radially offset locking elements via a spanning member,
- wherein the spanning member is embodied as a spring carrier having limbs extending radially between the at least one spring element and the locking elements.
6 more elements
A power tool, comprising:
- a tool spindle including a drive;
- and
- a torque limiting unit disposed in the drive of the tool spindle and received in a housing, the torque limiting unit including
- locking elements configured to disengage the drive when a release torque is exceeded,
- an axial locking brace comprising at least one spring brace exerting a spring force on the locking elements, the at least one spring brace including at least one spring element, and
- a support member bracing the axial locking brace with respect to the housing, the support member being displaceable in an axial direction with respect to the housing in order to adjust and set the release torque,
- wherein the locking elements and the at least one spring element of the spring brace are radially offset from each other,
- wherein the at least one spring element of the spring brace is braced with respect to the radially offset locking elements via a spanning member,
- wherein the spanning member is embodied as an annular spring carrier including at least one radially inwardly projecting supporting limb configured to support the at least one spring element and at least one radially outwardly protruding cantilever limb configured to support the support member.
6 more elements
A power tool, comprising:
- a tool spindle including a drive;
- and
- a torque limiting unit disposed in the drive of the tool spindle and received in a housing, the torque limiting unit including
- locking elements configured to disengage the drive when a release torque is exceeded,
- an axial locking brace comprising at least one spring brace exerting a spring force on the locking elements, the at least one spring brace including at least one spring element, and
- a support member bracing the axial locking brace with respect to the housing, the support member being displaceable in an axial direction with respect to the housing in order to adjust and set the release torque,
- wherein the locking elements and the at least one spring element of the spring brace are radially offset from each other,
- wherein the at least one spring element of the spring brace is disposed with a radial outward offset with respect to the locking elements,
- wherein the at least one spring element is disposed with an axial overlap with respect to the locking elements.
6 more elements
A power tool, comprising:
- a tool spindle including a drive;
- and
- a torque limiting unit disposed in the drive of the tool spindle and received in a housing, the torque limiting unit including
- locking elements configured to disengage the drive when a release torque is exceeded,
- an axial locking brace comprising at least one spring brace exerting a spring force on the locking elements, the at least one spring brace including at least one spring element, and
- a support member bracing the axial locking brace with respect to the housing, the support member being displaceable in an axial direction with respect to the housing in order to adjust and set the release torque,
- wherein the locking elements and the at least one spring element of the spring brace are radially offset from each other,
- wherein the at least one spring element of the spring brace is braced with respect to the radially offset locking elements via a spanning member,
- wherein the spanning member is embodied as an angular spanning member including at least one axially extending spring support and at least one radially inwardly projecting supporting limb.
6 more elements
Dependencies are inferred from the claim text.