Motor structure capable of dissipating heat therein

Patent metadata

Field	Value
Publication number	US-10110095-B2
Application number	US-201615283928-A
Country	US
Kind code	B2
Filing date	Oct 3, 2016
Priority date	Oct 7, 2015
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

A motor structure includes a housing, a cover, an air collecting structure fixed to the cover, an air guiding shell mounted around the housing and the air collecting structure, and a cooling fan. The cover defines a plurality of inlet holes. The air collecting structure defines a plurality of through holes aligned with the inlet holes of the cover, so as to provide a path for allowing one portion of the air current generated by the cooling fan to enter the housing. The housing defines a plurality of inlet holes and a plurality of outlet holes. One portion of the air guiding shell is located above the inlet holes of the housing to form another path for allowing another portion of the air current to enter the housing.

First claim

I claim:

1. In a motor including a housing, a cover, a rotating shaft, and a cooling fan, wherein the housing has a surrounding wall defining therein an inner space with a front opening and has a rear closure wall opposite to the front opening, the rear closure wall defining a central hole and a plurality of outlet holes, the surrounding wall of the housing defining at least one inlet hole; the cover, which is substantially disk-shaped and closes the front opening of the housing, has a central hub defining a central hole; the rotating shaft is mounted across the inner space of the housing, the rotating shaft having a first end which is inserted through the central hole of the rear closure wall and having a second end which is inserted through the central hole of the cover; the cooling fan is fixed to the second end of the rotating shaft, so that the cooling fan is rotated together with the rotating shaft; wherein the improvement comprises:
the cover defines a plurality of inlet holes around its central hub; an air collecting structure, which is adapted to be fixed to the cover, has a central hub defining a central hole aligned with the central hole of the cover for allowing the second end of the rotating shaft to insert therethrough and has an outer ring around the central hub of the air collecting structure and defines a plurality of through holes, located between the outer ring and the central hub of the air collecting structure and aligned with the inlet holes of the cover, whereby a central portion of a whirling, ongoing air current generated by the cooling fan can flow through the space between the outer ring and the central hub of the air collecting structure and then flow through the through holes of the air collecting structure and the inlet holes of the cover to enter the inner space of the housing and finally flow out of the housing via the outlet holes for dissipating the heat generated in the housing.

2. The motor of claim 1 , wherein an air guiding shell is mounted around the housing and the air collecting structure, the air guiding shell has a neck portion, a head portion having a dimension greater than the neck portion, and a gradually enlarged transitional portion integrally formed between the neck portion and the head portion, the neck portion opening out at a first opening, the head portion opening out at a second opening which is opposite to the first opening, the air guiding shell being mounted such that the neck portion is closely fitted around the-housing, and the head portion is located above the inlet hole of the housing, thus defining an annular air-guiding channel between the head portion and the housing, and forming an intercepting surface at an inner surface of the gradually enlarged transitional portion of the air guiding shell, the annular air-guiding channel communicating with the inlet hole of the housing and facing toward the cooling fan, the inlet hole of the housing being located between the intercepting surface and the second opening of the air guiding shell, whereby an outer portion of the air current can quickly pass through the annular air-guiding channel and the inlet hole of the housing to enter the housing to take away the heat generated therein.

3. The motor of claim 2 , wherein the first and second openings of the air guiding shell are circular in shape, and the air guiding shell is a bell-shaped body such that the annular air-guiding channel has a cross-sectional dimension which increases gradually from the intercepting surface to the second opening of the air guiding shell.

4. The motor of claim 3 , wherein the first opening of the air guiding shell has a diameter of (Y), the second opening of the air guiding shell has a diameter of (X), and the gradually enlarged transitional portion of the air guiding shell generally has an internal diameter of (Z) at its intercepting surface, wherein the relationship of X>Y and X>Z and Y=Z is fulfilled.

5. The motor of claim 2 , wherein the second opening or any cross section of the head portion of the air guiding shell is non-circular in shape.

6. The motor of claim 1 , wherein the cover is engaged with two sheaths provided at the housing so that the cover is installed to the housing and closes the front opening of the housing; two electrical terminal blades provided at the housing are inserted through the two sheaths to facilitate electrical connection for the motor.

7. The motor of claim 6 , wherein the air collecting structure is provided with two U-shaped members capable of engaging with the two sheaths, so that the air collecting structure is fixed to the cover.

8. The motor of claim 1 , wherein a sleeve made of a magnetically permeable metal is closely fitted around the surrounding wall of the housing to increase the performance of the motor.

Assignees

• Chou Wen San

Inventors

• Chou Wen-San

Classifications

• H02K9/06 Primary

  with fans or impellers driven by the machine shaft · CPC title

• H02K2205/09

  Machines characterised by drain passages or by venting, breathing or pressure compensating means · CPC title

• H02K9/14

  wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle · CPC title

• H02K9/28

  Cooling of commutators, slip-rings or brushes e.g. by ventilating · CPC title

• H02K5/02

  Casings or enclosures characterised by the material thereof · CPC title