US 7,743,846 B2Granted

Rotary spindle for power tool and power tool incorporating such spindle

AssigneeBlack & Decker Inc.

InventorsStefan D. Gensmann, Martin Lauterwald, Reimund Becht

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Abstract

A rotary spindle 4 for a power tool such as a hammer drill is disclosed. The spindle 4 comprises a first spindle part 402 for rotation about its longitudinal an axis by means of a motor and having an inwardly directed rim 406, and a second spindle part 404 for supporting a drill bit of the hammer drill and having an outwardly directed rim 410. The second spindle part 404 extends through an aperture 408 in the first spindle part 402 and rims 406, 410 cooperate with each other to prevent removal of the second spindle part 404 from the first spindle part 402. A circlip 414 locks the first and second spindle parts 402, 404 together and maintains o-rings 412 under compression.

Claims34

Dependent claims

A spindle for a power tool, the spindle comprising:

a first spindle member having at least one first abutment portion adjacent a first end thereof;
a second spindle member for supporting a working member of the power tool adjacent a first end thereof for rotation with said second spindle member about an axis, wherein said second spindle member is adapted to extend through an aperture adjacent said first end of said first spindle member and has at least one second abutment portion adjacent a second end thereof for cooperating with at least one said first abutment portion of said first spindle member to prevent removal of said second spindle member from said first end of said first spindle member in a first direction;
locking means for preventing removal of said second spindle member from said first end of said first spindle member in a second direction, opposite to said first direction;
and
biasing means for urging said second spindle member in said second direction relative to said first spindle member,
wherein the first spindle member transmits rotational energy from a motor of the power tool to the second spindle member;
and
wherein said biasing means includes at least one resilient member;
and
wherein at least one said resilient member comprises an O-ring arranged between said first abutment portion and said second abutment portion.

7 more elements

A power tool comprising:

a housing;
a motor having an output shaft for actuation of a working member of the tool;
and
a spindle comprising a first spindle member having at least one first abutment portion adjacent a first end thereof;
a second spindle member for supporting a working member of the power tool adjacent a first end thereof for rotation with said second spindle member about an axis, wherein said second spindle member is adapted to extend through an aperture adjacent said first end of said first spindle member and has at least one second abutment portion adjacent a second end thereof for cooperating with at least one said first abutment portion of said first spindle member to prevent removal of said second spindle member from said first end of said first spindle member in a first direction;
locking means for preventing removal of said second spindle member from said first end of said first spindle member in a second direction, opposite to said first direction;
and
biasing means for urging said second spindle member in said second direction relative to said first spindle member,
wherein the first spindle member transmits rotational energy from the motor of the power tool to the second spindle member;
and
wherein said biasing means includes at least one resilient member;
and
wherein at least one said resilient member comprises an O-ring arranged between said first abutment portion and said second abutment portion.

10 more elements

A spindle for a power tool, the spindle comprising:

a first spindle member having at least one first abutment portion adjacent a first end thereof;
a second spindle member for supporting a working member of the power tool adjacent a first end thereof for rotation with said second spindle member about an axis, wherein said second spindle member is adapted to extend through an aperture adjacent said first end of said first spindle member and has at least one second abutment portion adjacent a second end thereof for cooperating with at least one said first abutment portion of said first spindle member to prevent removal of said second spindle member from said first end of said first spindle member in a first direction;
locking means for preventing removal of said second spindle member from said first end of said first spindle member in a second direction, opposite to said first direction;
biasing means for urging said second spindle member in said second direction relative to said first spindle member;
and
wherein said first and second spindle members comprise cooperating engaging means for preventing rotation of said second spindle member about said axis relative to said first spindle member;
wherein the first spindle member transmits rotational energy from a motor of the power tool to the second spindle member;
and
wherein said biasing means includes at least one resilient member;
and
wherein at least one said resilient member comprises an O-ring arranged between said first abutment portion and said second abutment portion.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/146,180Filed 6 Jun 2005
Priority: GB 0412594.45 Jun 2004
Published: US 2005/0271489 A18 Dec 2005
Granted: 29 Jun 2010
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

B25D 17/06
Details of, or accessories for, portable power-driven percussive tools: hammer pistons; Anvils ; Guide-sleeves for pistons
B25D 2211/061
Means for driving the impulse member: swash-plate actuated impulse-driving mechanisms
Y10T 409/309352
Milling: cutter spindle or spindle support
B25D
Percussive tools

Family

US 2005/0271489 A1Pre-grant publication · published 8 Dec 2005
US 7,743,846 B2This patent

From the US filing history. Foreign family members aren’t listed.

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