Hand-Held Power Tool With Clamping Device For A Tool
First Claim
1. A hand-held power tool comprising:
- a work spindle for driving a tool, said work spindle having a tool end comprising a holding portion;
a fastener for fastening said tool to said work spindle against said holding portion, said fastener including a clamping shaft being insertable into said work spindle;
a displacement assembly configured for sliding said fastener between a released position in which said fastener can be detached from said work spindle and a clamped position in which said fastener is clamped against said holding portion by a claming force; and
a lock assembly received inside said work spindle for locking said clamping shaft against retraction in said clamped position and for releasing said clamping shaft allowing retraction from said work spindle in said released position;
wherein said lock assembly comprises a collar and a plurality of clamping members held by said collar radially displaceably against said clamping shaft;
wherein said clamping members comprise first inclined surfaces, said first inclined surfaces engaging second inclined surfaces provided on said collar upon movement of said collar against said first inclined surfaces, thereby impinging said clamping members towards said clamping shaft for engaging said clamping shaft in said clamped position.
1 Assignment
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Accused Products
Abstract
A hand-held power tool (10) is specified, comprising a work spindle (12) for driving a tool (68), said tool (68) being fastenable between a fastening element (38) and a holding portion (36) on a tool end of the work spindle (12), and a displacement device (24) for sliding the fastening element (38) between a released position in which the fastening element (38) can be detached from the work spindle (12) and a clamped position in which the fastening element (38) is clamped against the holding portion (36) by a spring element (48). The fastening element (38) includes a clamping shaft (42) that is insertable into the work spindle (12) and held in the clamped position by a lock assembly (54) inside the work spindle (12), and which can be removed when in the released position (FIG. 2).
75 Citations
20 Claims
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1. A hand-held power tool comprising:
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a work spindle for driving a tool, said work spindle having a tool end comprising a holding portion;
a fastener for fastening said tool to said work spindle against said holding portion, said fastener including a clamping shaft being insertable into said work spindle;
a displacement assembly configured for sliding said fastener between a released position in which said fastener can be detached from said work spindle and a clamped position in which said fastener is clamped against said holding portion by a claming force; and
a lock assembly received inside said work spindle for locking said clamping shaft against retraction in said clamped position and for releasing said clamping shaft allowing retraction from said work spindle in said released position;
wherein said lock assembly comprises a collar and a plurality of clamping members held by said collar radially displaceably against said clamping shaft;
wherein said clamping members comprise first inclined surfaces, said first inclined surfaces engaging second inclined surfaces provided on said collar upon movement of said collar against said first inclined surfaces, thereby impinging said clamping members towards said clamping shaft for engaging said clamping shaft in said clamped position. - View Dependent Claims (2, 16, 17, 20)
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3. A hand-held power tool comprising:
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a work spindle for driving a tool, said work spindle having a tool end comprising a holding portion;
a fastener for fastening said tool to said work spindle against said holding portion, said fastener including a clamping shaft being insertable into said work spindle;
a displacement assembly configured for sliding said fastener between a released position in which said fastener can be detached from said work spindle and a clamped position in which said fastener is clamped against said holding portion by a claming force; and
a lock assembly received inside said work spindle for locking said clamping shaft against retraction in said clamped position and for releasing said clamping shaft allowing retraction from said work spindle in said released position;
wherein said lock assembly comprises a collar and a plurality of clamping members held by said collar radially displaceably against said clamping shaft for engaging said clamping shaft in said clamped position. - View Dependent Claims (4, 5, 6, 7, 8, 9, 15, 18, 19)
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10. A hand-held power tool comprising:
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a work spindle for driving a tool, said work spindle having a tool end comprising a holding portion;
a fastener for fastening said tool to said work spindle against said holding portion, said fastener including a clamping shaft being insertable into said work spindle;
a displacement assembly configured for sliding said fastener between a released position in which said fastener can be detached from said work spindle and a clamped position in which said fastener is clamped against said holding portion by a claming force; and
a lock assembly received inside said work spindle for locking said clamping shaft against retraction in said clamped position and for releasing said clamping shaft allowing retraction from said work spindle in said released position;
wherein said lock assembly comprises clamping members that are arranged moveably against said clamping shaft for engaging said clamping shaft in said clamped position;
wherein said lock assembly further comprises a collar against which said clamping members are held radially displaceably; and
wherein said work spindle further comprises a spindle tube and a bearing journal that can be fixedly joined to each other, and which commonly define a cavity inside which said lock assembly and a spring element for biasing said fastener are accommodated. - View Dependent Claims (11, 12, 13, 14)
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Specification