POWER TOOL HAVING IMPROVED MOTOR AND CONTROLLER COOLING
First Claim
1. A power tool comprising:
- a housing having a first housing portion defining a first air chamber and a first air inlet, a second housing portion defining a second air chamber and a second air inlet, and a third housing portion defining a third air chamber and an air outlet;
a motor disposed in the first housing portion;
an electronics module disposed in the second housing portion and electrically connected to the motor, a power source, and a user input to control operation of the motor;
a tool output shaft driven by the motor to perform a working operation; and
a fan disposed in the third housing portion, the fan driven by the motor, wherein the fan;
(a) pulls a first ambient airstream through the first air chamber from the first air inlet and into the third air chamber, bypassing the second air chamber, to cool the motor, (b) pulls a second ambient airstream through the second air chamber from the second air inlet and into the third air chamber, bypassing the first air chamber, to cool the electronics module, and (c) exhausts the first ambient airstream and the second ambient airstream from the third air chamber via the air outlet.
1 Assignment
0 Petitions
Accused Products
Abstract
A power tool includes a motor housing defining a first air chamber with a first air inlet that receives a motor. A handle extending from the motor housing defines a second air chamber with a second air inlet that receives an electronics control module. A third air chamber with an air outlet receives a fan coupled to the motor output shaft. The fan: (a) pulls a first ambient airstream through the first air chamber from the first air inlet and into the third air chamber, bypassing the second air chamber, to cool the motor; (b) pulls a second ambient airstream through the second air chamber from the second air inlet and into the third air chamber, bypassing the first air chamber, to cool the electronics module; and (c) exhausts the first and second airstreams from the third air chamber via the air outlet.
29 Citations
20 Claims
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1. A power tool comprising:
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a housing having a first housing portion defining a first air chamber and a first air inlet, a second housing portion defining a second air chamber and a second air inlet, and a third housing portion defining a third air chamber and an air outlet; a motor disposed in the first housing portion; an electronics module disposed in the second housing portion and electrically connected to the motor, a power source, and a user input to control operation of the motor; a tool output shaft driven by the motor to perform a working operation; and a fan disposed in the third housing portion, the fan driven by the motor, wherein the fan;
(a) pulls a first ambient airstream through the first air chamber from the first air inlet and into the third air chamber, bypassing the second air chamber, to cool the motor, (b) pulls a second ambient airstream through the second air chamber from the second air inlet and into the third air chamber, bypassing the first air chamber, to cool the electronics module, and (c) exhausts the first ambient airstream and the second ambient airstream from the third air chamber via the air outlet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A power tool comprising:
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a motor housing defining a first air chamber with a first air inlet, and a third air chamber with an air outlet; a handle coupled to and extending from the motor housing, the handle defining a second air chamber with a second air inlet away from the motor housing; a motor disposed in the first air chamber; an electronics module disposed in the handle and electrically connected to the motor, a power source, and a user input to control operation of the motor; a tool output shaft driven by the motor to perform a working operation; and a fan disposed in the third air chamber, the fan driven by the motor, wherein the fan;
(a) pulls a first ambient airstream through the first air chamber from the first air inlet and into the third air chamber, bypassing the second air chamber, to cool the motor, (b) pulls a second ambient airstream through the second air chamber from the second air inlet and into the third air chamber, bypassing the first air chamber, to cool the electronics module, and (c) exhausts the first ambient airstream and the second ambient airstream from the third air chamber via the air outlet. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A power tool comprising:
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a motor housing defining an air outlet; a handle coupled to and extending from the motor housing, the handle defining an air chamber with an air inlet away from the motor housing; a motor disposed in the motor housing; an electronics module disposed in the handle and electrically connected to the motor, a power source, and a user input to control operation of the motor; a heat sink coupled to the electronics module and disposed in the handle; a tool output shaft driven by the motor to perform a working operation; and a fan disposed in the motor housing and driven by the motor, wherein the fan pulls ambient air through the air chamber from the air inlet, and out of the air outlet, to cool the electronics module, wherein the handle has a front portion facing a front end of the power tool, a rear portion facing a rear end of the power tool, and two lateral side portions joining the front portion and the rear portion, the third air chamber at least partially defined by a converging channel formed only in one of the lateral side portions of the handle, the converging channel receiving the heat sink.
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Specification