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US 8,127,862 B2Granted
Power tool
AssigneeMakita Corporation
InventorYonosuke Aoki
Life of this patent
Estimating the term…
Abstract
A power tool capable of performing vibration damping action in working operation, without an increase in size. The working tool includes a motor, a housing in which an internal mechanism driven by the motor is stored, a tool bit disposed on one end of the housing, a hand grip continuously connected to the other end of the housing, and a dynamic damper. The dynamic damper is disposed by utilizing a space between the housing and the internal mechanism so that the damping direction of the dynamic damper faces the longitudinal direction of the tool bit.
Claims8
A power tool comprising:
- a motor;
- an internal mechanism driven by the motor;
- a housing that houses the motor and the internal mechanism;
- a tool bit disposed in one end of the housing and driven by the internal mechanism in the longitudinal direction of the tool bit to perform a predetermined operation;
- a handgrip connected to the other end of the housing;
- and
- a dynamic vibration reducer including a weight and an elastic element, the elastic element includes two springs disposed on one end of the weight in the longitudinal direction and two springs disposed on the other end of the weight in the longitudinal direction, the two springs on the one end being separate from the two springs on the other end, wherein
- the elastic element is disposed between the weight and the housing and adapted to apply a biasing force to the weight, the weight reciprocates in the longitudinal direction of the tool bit against the biasing force of the elastic element, the dynamic vibration reducer reduces vibration which is caused in the housing in the longitudinal direction of the tool bit in the working operation, and the dynamic vibration reducer is disposed by utilizing an internal space defined by the housing, and wherein
- the housing includes an inner housing that houses the internal mechanism and an outer housing that houses the inner housing and the motor such that the axial direction of the motor crosses the longitudinal direction of the tool bit, and the dynamic vibration reducer is disposed by utilizing a space existing between an outer wall surface of a side region of the inner housing and an inner wall surface of a side region of the outer housing and extending in the longitudinal direction of the tool bit.
6 more elements
A power tool comprising:
- a motor;
- an internal mechanism driven by the motor;
- a housing that houses the motor and the internal mechanism;
- a tool bit disposed in one end of the housing and driven by the internal mechanism in the longitudinal direction of the tool bit to perform a predetermined operation;
- a handgrip connected to the other end of the housing;
- and
- a dynamic vibration reducer including a weight and an elastic element, the elastic element includes two springs disposed on one end of the weight in the longitudinal direction and two springs disposed on the other end of the weight in the longitudinal direction, the two springs on the one end being separate from the two springs on the other end, wherein
- the elastic element being disposed between the weight and the housing and adapted to apply a biasing force to the weight, the weight reciprocates in the longitudinal direction of the tool bit against the biasing force of the elastic element, the dynamic vibration reducer reduces vibration which is caused in the housing in the longitudinal direction of the tool bit in the working operation, and the dynamic vibration reducer is disposed by utilizing an internal space defined by the housing, and wherein
- the housing includes an inner housing that houses the internal mechanism and an outer housing that houses the inner housing and the motor such that the axial direction of the motor crosses the longitudinal direction of the tool bit, and wherein the dynamic vibration reducer is disposed by utilizing a space existing between an outer wall surface of an upper surface region of the inner housing and an inner wall surface of an upper surface region of the outer housing and extending in the longitudinal direction of the tool bit.
6 more elements
A power tool comprising:
- a motor;
- an internal mechanism driven by the motor;
- a housing that houses the motor and the internal mechanism;
- a tool bit disposed in one end of the housing and driven by the internal mechanism in the longitudinal direction of the tool bit to perform a predetermined operation;
- a handgrip connected to the other end of the housing;
- and
- a dynamic vibration reducer including a weight and an elastic element, the elastic element includes two springs disposed on one end of the weight in the longitudinal direction and two springs disposed on the other end of the weight in the longitudinal direction, the two springs on the one end being separate from the two springs on the other end, wherein
- the elastic element being disposed between the weight and the housing and adapted to apply a biasing force to the weight, the weight reciprocates in the longitudinal direction of the tool bit against the biasing force of the elastic element, the dynamic vibration reducer reduces vibration which is caused in the housing in the longitudinal direction of the tool bit in the working operation, and the dynamic vibration reducer is disposed by utilizing an internal space defined by the handgrip, and wherein
- the dynamic vibration reducer is disposed by utilizing a space within the handgrip such that the vibration reducing direction of the dynamic vibration reducer coincides with the longitudinal direction of the tool bit.
6 more elements
Dependencies are inferred from the claim text.