Back to results
US 8,936,107 B2Granted
Rotary tools
AssigneeMakita Corporation
InventorFumitoshi Numata
Life of this patent
Estimating the term…
Abstract
A rotary tool includes a drive device, a driven member configured to be rotatably driven by the drive device, a spindle rotatably supported within a housing, an impact attenuation mechanism disposed between the driven member and the spindle and transmitting rotation of the driven member to the spindle while an impact applied to the driven member being attenuated, and a driven member support bearing rotatably supporting the driven member, so that the driven member can rotate relative to the spindle.
Claims14
A rotary tool comprising:
- a drive device;
- a driven member configured to be rotatably driven by the drive device;
- a spindle rotatably supported within a housing;
- an impact attenuation mechanism disposed between the driven member and the spindle and transmitting rotation of the driven member to the spindle while an impact applied to the driven member being attenuated;
- and
- a driven member support bearing rotatably supporting the driven member, so that the driven member can rotate relative to the spindle,
- wherein the spindle is rotatably supported by a first spindle support bearing and a second spindle support bearing mounted within the housing, and the driven member support bearing is disposed between the first spindle support bearing and the second spindle support bearing in an axial direction of the spindle.
4 more elements
A rotary tool comprising:
- an electric motor;
- a gear head housing:
- a reduction gear train disposed within the gear head housing and including a drive gear and a driven gear meshing with each other, the drive gear being coupled to the electric motor,
- a spindle rotatably supported within the gear head housing via a first bearing and a second bearing;
- an impact attenuation mechanism disposed between the driven gear and the spindle and transmitting rotation of the driven gear to the spindle while an impact applied to the driven gear being attenuated;
- wherein the impact attenuation mechanism includes a torque transmission member interposed between the driven gear and the spindle, the torque transmission member being resiliently deformable when transmitting rotation of the driven gear to the spindle;
- and
- a third bearing rotatably supporting the driven gear, so that the driven gear can rotate relative to the spindle;
- wherein the third bearing is disposed between the first bearing and the second bearing in an axial direction of the spindle.
6 more elements
A rotary tool comprising:
- a drive device;
- a driven member configured to be rotatably driven by the drive device;
- a spindle rotatably supported within a housing;
- an impact attenuation mechanism disposed between the driven member and the spindle and transmitting rotation of the driven member to the spindle while an impact applied to the driven member being attenuated;
- and
- a driven member support bearing rotatably supporting the driven member, so that the driven member can rotate relative to the spindle, wherein:
- the driven member includes a support boss portion having a support hole formed therein;
- the spindle is inserted into the support hole, so that the inner circumferential surface of the support hole slidably contacts the outer circumferential surface of the spindle;
- the housing includes a bearing holder;
- one of the first and second spindle support bearings is mounted to the bearing holder;
- and
- the driven member support bearing is interposed between the support boss portion and the bearing holder.
9 more elements
A rotary tool comprising:
- an electric motor;
- a gear head housing:
- a reduction gear train disposed within the gear head housing and including a drive gear and a driven gear meshing with each other, the drive gear being coupled to the electric motor,
- a spindle rotatably supported within the gear head housing via a first bearing and a second bearing;
- an impact attenuation mechanism disposed between the driven gear and the spindle and transmitting rotation of the driven gear to the spindle while an impact applied to the driven gear being attenuated;
- wherein the impact attenuation mechanism includes a torque transmission member interposed between the driven gear and the spindle, the torque transmission member being resiliently deformable when transmitting rotation of the driven gear to the spindle;
- and
- a third bearing rotatably supporting the driven gear, so that the driven gear can rotate relative to the spindle, wherein:
- the driven gear includes a support boss portion having a support hole formed therein, and the spindle is inserted into the support hole, so that the inner circumferential surface of the support hole slidably contacts the outer circumferential surface of the spindle;
- the gear head housing includes a bearing holder;
- one of the first and second spindle support bearings is mounted to the bearing holder;
- and
- the third bearing is interposed between the support boss portion and the bearing holder.
10 more elements
Dependencies are inferred from the claim text.