Hand-held power tool with a pneumatic percussion mechanism
AssigneeHilti Aktiengesellschaft
InventorJosef Fuenfer
Life of this patent
Estimating the term…
Abstract
A hand-held power tool includes a pneumatic percussion mechanism (20) having a driving member (22) reciprocating in the guide tube (21), a percussion member (23) driven by the driving member (22), and an air spring (24) located between the driving member (22) and the percussion member (23) transmits a reciprocating movement of the driving member (22) to the percussion member (23), The hand-held power tool further includes a motor-driven elongate swashplate member (29) for reciprocating the driving member (22) a displacement stroke of which is adjusted by an adjusting member (31) displaceable along a longitudinal extent of a swashplate member (29) for adjusting a swashplate angle that determines the displacement stroke of the driving member (22).
Claims10
A hand-held power tool, comprising:
- a pneumatic percussion mechanism (20) defining a central percussion axis (S) and having a guide tube (21), a driving member (22) reciprocating in the guide tube (21), a percussion member (23) driven by the driving member (22), and an air spring (24) located between the driving member (22) and the percussion member (23) for transmitting a reciprocating movement of the driving member (22) to the percussion member (23);
- a motor (12) for driving the percussion mechanism (20);
- a motor-driven elongate swashplate member (29) for reciprocating the driving member (22);
- an adjustment device (30) for adjusting a displacement stroke of the driving member (22) and including an adjusting member (31) displaceable along a longitudinal extent of the swashplate member (29) for adjusting a swashplate angle that determines the displacement stroke of the driving member (22);
- and
- a hub member (25) for transmitting the stroke movement to the swashplate member (29), wherein the hub member (25) is displaceable by the adjusting member (31) along the longitudinal extent of the swashplate member (29) relative thereto and wherein the hub member (25) has a bearing support (27) through which the swashplate member (29) is displaceable.
A hand-held power tool, comprising:
- a pneumatic percussion mechanism (20) defining a central percussion axis (S) and having a guide tube (21), a driving member (22) reciprocating in the guide tube (21), a percussion member (23) driven by the driving member (22), and an air spring (24) located between the driving member (22) and the percussion member (23) for transmitting a reciprocating movement of the driving member (22) to the percussion member (23);
- a motor (12) for driving the percussion mechanism (20);
- a motor-driven elongate swashplate member (29) for reciprocating the driving member (22);
- and
- an adjustment device (30) for adjusting a displacement stroke of the driving member (22) and including an adjusting member (31) displaceable along a longitudinal extent of the swashplate member (29) for adjusting a swashplate angle that determines the displacement stroke of the driving member (22), wherein the adjustment device (30) includes a manually actuatable actuation member (34) for the adjusting member (31) and wherein the adjusting member (31) has a first adjusting element (35) cooperating with a second adjusting element (36) provided on the actuation member (34).
A hand-held power tool, comprising:
- a pneumatic percussion mechanism (20) defining a central percussion axis (S) and having a guide tube (21), a driving member (22) reciprocating in the guide tube (21), a percussion member (23) driven by the driving member (22), and an air spring (24) located between the driving member (22) and the percussion member (23) for transmitting a reciprocating movement of the driving member (22) to the percussion member (23);
- a motor (12) for driving the percussion mechanism (20);
- a motor-driven elongate swashplate member (29) for reciprocating the driving member (22), wherein the swashplate member (29) has, at an end thereof remote from the driving member (22), a support member (39) pivotally supported on a counter-support member (40) and axially fixed with respect to a longitudinal extent thereof;
- and
- an adjustment device (30) for adjusting a displacement stroke of the driving member (22) and including an adjusting member (31) displaceable along a longitudinal extent of the swashplate member (29) for adjusting a swashplate angle that determines the displacement stroke of the driving member (22).
Dependencies are inferred from the claim text.