Driver drill
AssigneeMakita Corporation
InventorHidenori Nagasaka
Life of this patent
Estimating the term…
Abstract
A driver-drill (1) includes a motor (16), a spindle (32), which is rotationally driven using rotational energy output by the motor (16), and a chuck (30), which rotates integrally with the spindle (32). The chuck (30) includes: a chuck body (31); a chuck sleeve (80), which is externally mounted on the chuck body (31); and two or more chuck jaws (67), which are provided in the chuck body (31) and which expand and contract relative to the rotational axis of the spindle (32) in response to manual rotation of the chuck sleeve (80). The spindle (32) may be integrally formed (in one piece) with the chuck body (31). In addition or in the alternative, the chuck body (31) may be rotatably supported by a bearing (42) disposed in a tube-shaped housing (6).
Claims20
A driver-drill, comprising:
- a motor;
- a spindle configured to be rotationally driven using rotational energy output by the motor;
- and
- a chuck, which rotates integrally with the spindle;
- wherein:
- the chuck comprises:
- a chuck body;
- a chuck sleeve, which is externally mounted on the chuck body;
- and two or more chuck jaws, which are provided in the chuck body and are configured to radially spread apart and converge together relative to a rotational axis of the spindle in response to manual rotation of the chuck sleeve;
- the spindle is formed integrally with the chuck body such that there is no seam between the spindle and the chuck body;
- the spindle extends in a front-rear direction within a tube-shaped housing that protrudes forward;
- a rear end of the spindle is rotatably supported by a first bearing within the tube-shaped housing;
- the chuck body is rotatably supported by a second bearing;
- the second bearing is disposed forward of the first bearing within the tube-shaped housing;
- the second bearing mates with a receiving surface defined on an inner-circumferential surface of the tube-shaped housing and is held within the tube-shaped housing;
- and
- the second bearing is retained by a bearing retainer that is screwed into the receiving surface forward of the second bearing.
A driver-drill, comprising:
- a motor;
- a spindle configured to be rotationally driven using rotational energy output by the motor;
- and
- a chuck, which rotates integrally with the spindle;
- wherein:
- the chuck comprises:
- a chuck body;
- a chuck sleeve, which is externally mounted on the chuck body;
- and two or more chuck jaws, which are provided in the chuck body and are configured to expand and contract relative to an axial direction of the spindle in response to manual rotation of the chuck sleeve;
- a bearing is disposed within a tube-shaped housing and rotatably supports the chuck body;
- an inner diameter of the bearing is larger than a circumscribed circle defined by rearward ends of the chuck jaws;
- the bearing mates with a receiving surface defined on an inner-circumferential surface of the housing and is thereby held within the tube-shaped housing, and
- the bearing is retained by a bearing retainer that is screwed into the receiving surface forward of the bearing.
Dependencies are inferred from the claim text.