Electric power tool
First Claim
1. An electric power tool comprising:
- a motor;
a chuck to attach a tool to a head of said chuck;
a transmission provided between said motor and said chuck and configured to transmit power from said motor to said chuck;
a housing to store said motor and said transmission, said housing having separate air intake ports to take in air from the external environment and an exhaust port to expel air therefrom; and
a fan provided between said motor and said transmission;
wherein said air intake ports are provided in the vicinity of said motor and said transmission, respectively, and said exhaust port is provided in the vicinity of said fan, said fan configured to draw in two separate streams of air from said separate air intake ports, respectively, a first stream of air drawn in from a motor side of said fan, and a second stream of air drawn in from a transmission side of said fan.
2 Assignments
0 Petitions
Accused Products
Abstract
An electric power tool incorporating a single fan that provides efficient cooling of the motor and transmission while reducing the cost and size of the power tool. The power tool includes a speed reduction transmission provided within a housing between the motor and a chuck which is located at the front end of the power tool. The rotation of the fan cools the motor and the transmission by drawing in external air from intake ports formed in the housing, and collectively exhausts the warmed cooling air through exhaust ports formed in the housing. The power tool includes a fan, located between the motor and the transmission, that is constructed to draw in two separate streams of cooling air from air intake ports located adjacent to the motor and the transmission, and to exhaust used cooling air through exhaust ports located adjacent to the fan.
56 Citations
14 Claims
-
1. An electric power tool comprising:
-
a motor; a chuck to attach a tool to a head of said chuck; a transmission provided between said motor and said chuck and configured to transmit power from said motor to said chuck; a housing to store said motor and said transmission, said housing having separate air intake ports to take in air from the external environment and an exhaust port to expel air therefrom; and a fan provided between said motor and said transmission; wherein said air intake ports are provided in the vicinity of said motor and said transmission, respectively, and said exhaust port is provided in the vicinity of said fan, said fan configured to draw in two separate streams of air from said separate air intake ports, respectively, a first stream of air drawn in from a motor side of said fan, and a second stream of air drawn in from a transmission side of said fan. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
-
Specification