Search

CN-122008133-A - Tool housing and motor exhaust management

CN122008133ACN 122008133 ACN122008133 ACN 122008133ACN-122008133-A

Abstract

A motorized hand tool, such as a cordless ratchet wrench, has a motor and a housing surrounding or containing the motor. The motor includes one or more exhaust ports that exhaust the exhaust gases from the motor. The housing includes one or more vents and an inwardly projecting boss or guide extending around the vents. An inwardly projecting boss/guide extends in a direction toward the motor exhaust port and/or is at least partially disposed in the motor exhaust port to direct exhaust gases away from the housing and to inhibit recirculation of exhaust gases in the vicinity of the motor and electronic components of the tool.

Inventors

  • David A. cybersky

Assignees

  • 施耐宝公司

Dates

Publication Date
20260512
Application Date
20210901
Priority Date
20200902

Claims (11)

  1. 1. A housing for a tool and adapted to house a motor having a first motor exhaust, the housing comprising: A first outlet disposed in the housing and having a first outlet perimeter adapted to align with the first motor exhaust in a radial direction relative to the motor, and A first guide disposed about the first outlet perimeter and extending inwardly from the first inner surface of the housing, wherein an end of the first guide is adapted to be at least partially disposed in the first motor exhaust port and direct exhaust gas from the motor to an exterior of the housing.
  2. 2. The enclosure of claim 1, further comprising a first enclosure portion, wherein the first outlet is disposed in the first enclosure portion.
  3. 3. The enclosure of claim 2, further comprising a second enclosure portion coupled to the first enclosure portion to cooperatively form the enclosure.
  4. 4. A housing according to claim 3, further comprising a second outlet provided in the second housing portion and having a second outlet periphery.
  5. 5. The enclosure of claim 4, further comprising a second guide disposed about the second outlet periphery, wherein an end of the second guide is adapted to be disposed proximate a second motor exhaust port and to direct exhaust from the motor to an exterior of the enclosure.
  6. 6. The housing of claim 5, wherein the second guide protrudes inwardly from a second inner surface of the second housing portion, and the end of the second guide is adapted to be at least partially disposed in the second motor exhaust port.
  7. 7. The enclosure of claim 2, further comprising a first inlet disposed in the first enclosure portion and adapted to allow air outside of the enclosure to be drawn into the enclosure by the motor.
  8. 8. The enclosure of claim 5, further comprising a second inlet disposed in the second enclosure portion and adapted to allow air outside of the enclosure to be drawn into the enclosure by the motor.
  9. 9. A tool housing adapted to house a motor having first and second motor vents and a motor inlet, the tool housing comprising: a first clamshell housing portion comprising: a first outlet having a first outlet periphery adapted to be aligned with the first motor exhaust in a radial direction relative to the motor, and A first guide disposed about the first outlet perimeter and extending inwardly from the first inner surface of the first clamshell housing portion, wherein an end of the first guide is adapted to be at least partially disposed in the first motor exhaust port and to direct exhaust from the motor to an exterior of the tool housing, and A second clamshell housing portion comprising: a second outlet having a second outlet periphery adapted to be aligned with the second motor exhaust in a radial direction relative to the motor, and A second guide disposed about the second outlet perimeter and extending inwardly from the second inner surface of the second clamshell housing portion, wherein an end of the second guide is adapted to be at least partially disposed in the second motor exhaust and to direct exhaust from the motor to an exterior of the tool housing.
  10. 10. The tool housing of claim 9, wherein the first clamshell housing portion further comprises a first inlet disposed therein and adapted to allow air from outside the tool housing to be drawn into the tool housing.
  11. 11. The tool housing of claim 10, wherein the second clamshell housing portion further comprises a second inlet disposed therein and adapted to allow air from outside the tool housing to be drawn into the tool housing.

Description

Tool housing and motor exhaust management The present application is a divisional application of patent application of the application with the application date 2021, 9 and 1, the application number 202111021026.0 and the application name of "tool housing and motor exhaust management". Technical Field The present invention relates to a tool housing for providing a limit to recirculation of motor exhaust gases. Background Power hand tools, such as, for example, motorized ratchet wrenches and drivers, are commonly used to install and remove threaded fasteners in automotive industrial and household applications, as well as to apply torque and/or angular displacement to a workpiece, such as, for example, a threaded fastener. Power hand tools such as cordless power ratchets and drives typically include an electric motor and other electronic components and batteries housed in a clamshell housing. Clamshell housings typically comprise two or more housing portions fastened together by fasteners such as screws or rivets. Cooling the motor and other electronic components is important, but can be difficult. To cool the motor, the motor draws outside air into the motor, after which the air is heated by the motor during operation. The heated air is then expelled out of the motor as exhaust. Existing solutions for treating exhaust gases include providing slots in the housing of the tool near the motor to allow exhaust gases to be expelled from the housing. However, inaccuracy or inefficiency in the direction of exhaust gas exiting the housing of the tool can result in recirculation of exhaust gas within the tool housing in the vicinity of the motor and other electronic components and increased heat from the motor and other components rather than removed heat. Other components in the tool's housing may also generate heat and cause the air in the tool's housing to be heated to saturation and not absorb heat. Thus, the recirculated exhaust gas is problematic if it is allowed to recirculate in the housing. For example, improper or ineffective treatment of exhaust gases can cause the motor and/or other components to overheat and malfunction, thereby rendering the tool inoperable. Disclosure of Invention The present invention relates generally to motorized hand tools, such as cordless ratchet wrenches, having a motor and a housing enclosing or housing the motor and other components. The motor includes one or more exhaust ports that exhaust the exhaust gases out of the motor. Cooling of the motor and electronic components (e.g., controller or printed circuit board) in a cordless ratchet wrench is important because a large number of motor stall events are typically experienced during normal use. To limit recirculation of exhaust gases within the housing in the vicinity of the motor and electronic components of the tool, the housing includes one or more exhaust ports and inwardly projecting bosses or guides extending around the periphery of the exhaust ports. An inwardly projecting boss or guide extends in a direction toward the motor exhaust port and/or is at least partially disposed in or extends into the motor exhaust port to effectively direct exhaust gases away from the housing and limit recirculation of exhaust gases in the vicinity of the motor and electronic components of the tool. In one embodiment, the invention broadly relates to a housing for a tool, wherein the housing is adapted to house a motor having one or more motor vents. The housing includes a first outlet disposed therein and a first guide extending around the first outlet. The end of the first guide is adapted to be disposed adjacent to a first motor exhaust port and to direct exhaust gas from the motor to the exterior of the housing. In another embodiment, the invention broadly relates to a tool housing adapted to house a motor having first and second motor vents and a motor inlet. The tool housing includes a first clamshell housing portion and a second clamshell housing portion coupled together to cooperatively form the tool housing. The first clamshell housing portion comprises a first outlet disposed therein and a first guide extending around a periphery of the first outlet, wherein an end of the first guide is adapted to be disposed proximate the first motor exhaust and to direct exhaust away from the motor and out of the tool housing. The second clamshell housing portion similarly includes a second outlet disposed in the second clamshell housing portion and a second guide extending about a periphery of the second outlet, wherein an end of the second guide is adapted to be disposed proximate the second motor exhaust and to direct exhaust away from the motor and out of the tool housing. Drawings For the purpose of facilitating an understanding of the subject matter sought to be protected, there is shown in the drawings embodiments thereof, which, upon consideration of the following description, are to be understood and appreciated, as well as a number of