Electric power tool
AssigneeMakita Corporation
InventorFumitoshi Numata
Life of this patent
Estimating the term…
Abstract
An electric power tool includes a housing, a fan, a tubular portion, and a rectifier. The housing houses a motor. The fan rotates in association with driving of the motor to generate a cooling air for the motor within the housing. The tubular portion is formed in the housing to house the fan. The rectifier is disposed to be opposed to the fan in an upstream side of the cooling air. The rectifier is divided into an inside and an outside in a radial direction of the tubular portion, the outside in the radial direction is formed of the tubular portion, and the inside in the radial direction is formed of a baffle plate assembled to the housing.
Claims19
An electric power tool comprising:
- a housing that houses a motor;
- a fan that is configured to rotate in association with driving of the motor to generate a cooling air for the motor within the housing;
- a ring-shaped baffle plate attached to the housing inside of the housing;
- and
- an air funnel (i) on an upstream side of the fan with regard to a flow of the cooling air and (ii) that has an interior continuously sloping surface that continuously widens in diameter in a direction of the flow of the cooling air, wherein
- the housing includes a tubular portion that houses the fan,
- the ring-shaped baffle plate includes a first part of the interior continuously sloping surface,
- the tubular portion includes a second part of the interior continuously sloping surface,
- the first part and the second part abut to form a continuous surface, and
- the second part is downstream of the first part in the direction of the flow of the cooling air.
An electric power tool comprising:
- a housing that houses a motor;
- a fan that is configured to rotate in association with driving of the motor to generate a cooling air for the motor within the housing;
- a ring-shaped baffle plate attached to the housing inside of the housing;
- and
- an air funnel (i) on an upstream side of the fan with regard to a flow of the cooling air and (ii) that has an interior continuously sloping surface that continuously widens in diameter in a direction of the flow of the cooling air, wherein
- the housing includes a tubular portion that houses the fan,
- the ring-shaped baffle plate includes a first part of the interior continuously sloping surface,
- the tubular portion includes a second part of the interior continuously sloping surface,
- the first part and the second part abut to form a continuous surface, and
- the second part is downstream of the first part in the direction of the flow of the cooling air.
Dependencies are inferred from the claim text.