WO2020027411A1 - Motor for dual fans with one shaft - Google Patents

Motor for dual fans with one shaft Download PDF

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Publication number
WO2020027411A1
WO2020027411A1 PCT/KR2019/005903 KR2019005903W WO2020027411A1 WO 2020027411 A1 WO2020027411 A1 WO 2020027411A1 KR 2019005903 W KR2019005903 W KR 2019005903W WO 2020027411 A1 WO2020027411 A1 WO 2020027411A1
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WO
WIPO (PCT)
Prior art keywords
coupled
bearing
fan
shaft
motor
Prior art date
Application number
PCT/KR2019/005903
Other languages
French (fr)
Inventor
Jeong Cheol Jang
Ji Min Lee
Original Assignee
New Motech Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by New Motech Co., Ltd. filed Critical New Motech Co., Ltd.
Publication of WO2020027411A1 publication Critical patent/WO2020027411A1/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/15—Mounting arrangements for bearing-shields or end plates
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0076—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids adapted for vehicle cleaning
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L7/00—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids
    • A47L7/0085—Suction cleaners adapted for additional purposes; Tables with suction openings for cleaning purposes; Containers for cleaning articles by suction; Suction cleaners adapted to cleaning of brushes; Suction cleaners adapted to taking-up liquids adapted for special purposes not related to cleaning
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
    • A47L9/00—Details or accessories of suction cleaners, e.g. mechanical means for controlling the suction or for effecting pulsating action; Storing devices specially adapted to suction cleaners or parts thereof; Carrying-vehicles specially adapted for suction cleaners
    • A47L9/22—Mountings for motor fan assemblies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/00457—Ventilation unit, e.g. combined with a radiator
    • B60H1/00471—The ventilator being of the radial type, i.e. with radial expulsion of the air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D25/0606—Units comprising pumps and their driving means the pump being electrically driven the electric motor being specially adapted for integration in the pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/16—Combinations of two or more pumps ; Producing two or more separate gas flows
    • F04D25/166—Combinations of two or more pumps ; Producing two or more separate gas flows using fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/161—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/173—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings
    • H02K5/1732—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using bearings with rolling contact, e.g. ball bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor

Definitions

  • the present invention relates to a motor for dual fans. More specifically, the present invention relates to a motor for dual fans capable of coupling two loads to one motor shaft, while operating each load separately, and holding the shaft in a regular position.
  • vehicles have fan motors for heating ventilation and air conditioning applied thereto to circulate the indoor air.
  • These fan motors for heating ventilation and air conditioning are located in the front of the vehicles where the air conditioner or heater is located.
  • fan motors for heating ventilation and air conditioning are also applied in the backseats or trunks of the vehicles.
  • vacuum cleaners for cleaning the vehicles are sometimes installed in the trunk side. These vacuum cleaners need fan motors for inhaling dust.
  • HVAC heating ventilation and air conditioning
  • US Patent No. 6,896,478 discloses a dual fan blower which axially connects two fans to one motor, and circulates the air through a chamber on which each fan is located.
  • Said patent discloses a technology that when one motor shaft rotates, two fans coupled to both ends of the motor shaft, respectively, rotate together so as to operate two fans with one motor at the same time.
  • the dual fan blower is applied to the device for heating ventilation and air conditioning and the vacuum cleaner at the same time, the fan of the air conditioner and the fan of the cleaner always have to be operated at the same time, thereby raising a problem in the application thereof.
  • the present inventors suggest a motor for dual fans capable of coupling two fans to one motor shaft, while selectively driving two fans without rotating them at the same time, and holding the shaft in a regular position.
  • the motor for dual fans comprises a body (10) which includes an upper housing (11) and a lower housing (12) and has a stator installed therein; a shaft (13) which is coupled to a rotor located to be opposite to the stator to rotate together and is extended to an upper portion and a lower portion of the body (10); a first fan (21) which is coupled to an upper portion of the shaft (13); and a second fan (31) which is coupled to a lower portion of the shaft (13), characterized in that a first unidirectional bearing (23) is coupled to the first fan (21), and thereby an inner race of the first unidirectional bearing (23) is rotatably coupled to an upper portion of the shaft (31), a second unidirectional bearing (33) is coupled to the second fan (31), and thereby an inner race of the second unidirectional bearing (33) is rotatably coupled to a lower portion of the shaft (13), and the first unidirectional bearing (23) is press-fit into a holding part (22B) of a first unidirectional bearing
  • the second unidirectional bearing (33) is press-fit and installed in a holding part (32B) of a second unidirectional bearing holder (32) coupled to a central portion of the second fan (31), and an outer surface of the holding part (32B) is rotatably coupled to a second centering bearing (151), wherein the second centering bearing (151) may be coupled to a second centering bracket (15) coupled to the lower housing (12).
  • the motor for dual fans may further comprise a lower bearing (112) for supporting the rotation of the shaft, which is coupled to the second centering bracket (15) and located in an upper portion of the second centering bearing (151).
  • the motor for dual fans further comprises a multiple bearing holder (50) which is press-fit and installed in the center of the stator (114), wherein the second unidirectional bearing (33) is press-fit and installed in a holding part (32B) of a second unidirectional bearing holder (32) coupled to a central portion of the second fan (31), an upper bearing press-fit part (51) in which an upper bearing (111) for supporting the rotation of the shaft (13) is installed is formed in an upper portion of the multiple bearing holder (50), the multiple bearing holder (50) is extended to the second unidirectional bearing holder (32), and a second bearing press-fit part (53) in which a second centering bearing (151) to which an outer surface of the holding part (32B) is rotatably coupled is installed is formed in a lower portion of the multiple bearing holder (50).
  • a multiple bearing holder (50) which is press-fit and installed in the center of the stator (114)
  • the second unidirectional bearing (33) is press-fit and installed in a holding
  • a lower bearing press-fit part (52) in which a lower bearing (112) for supporting the rotation of the shaft (13) is press-fit and installed is formed in an upper portion of the second centering bearing press-fit part (53) of the multiple bearing holder (50).
  • the present invention has the effect of providing a motor for dual fans capable of selectively driving two fans with one motor and holding a shaft in a stable position. Furthermore, the present invention has the effect of providing a motor for dual fans capable of applying a cleaning inhalation fan to a shaft of the fan motor for heating ventilation and air conditioning on which a blower fan is mounted so that the motor can be used for both the device for heating ventilation and air conditioning and the cleaner, thereby saving the space to have the motor installed in the vehicle and costs, and reducing electric power consumed in the vehicle.
  • Fig. 1 is a perspective view of the motor for dual fans according to the present invention
  • Fig. 2 is a top exploded perspective view of the motor for dual fans according to the present invention
  • Fig. 3 is a bottom exploded perspective view of the motor for dual fans according to the present invention.
  • Fig. 4 is a cross-sectional view of the motor for dual fans according to the present invention.
  • Fig. 5 is a cross-sectional view of the motor for dual fans according to another embodiment of the present invention.
  • Fig. 1 is a perspective view of the motor for dual fans (100) according to the present invention
  • Fig. 2 is a top exploded perspective view of the first fan unit (20) of the motor for dual fans (100) according to the present invention
  • Fig. 3 is a bottom exploded perspective view of the second fan unit (30) of the motor for dual fans (100) according to the present invention.
  • the motor for dual fans according to the present invention comprises a body (10), a first fan unit (20), and a second fan unit (30).
  • the body (10) comprises an upper housing (11) and a lower housing (12), and a shaft (13) penetrates into a central portion of the body.
  • the upper portion and lower portion of the shaft (13) protrude upwardly and downwardly from the upper housing (11) and the lower housing (12), respectively, and loads are coupled to the upper and lower portions of the shaft (13), respectively.
  • two fans are coupled to the upper and lower portions of the shaft (13), respectively.
  • a first fan (21) is coupled to the upper portion of the shaft (13)
  • a second fan (31) is coupled to the lower portion of the shaft (13).
  • the first fan unit (20) is located on the upper portion of the body (10), and comprises a first fan (21) coupled to the upper portion of the shaft (13).
  • the first fan (21) may be a blower fan of the device for heating ventilation and air conditioning in a vehicle, but is not necessarily limited thereto.
  • a central fixing part (211) is positioned in the center of the first fan (21), and a first unidirectional bearing holder (22) is coupled to the lower side of the central fixing part (211) with a bolt (B) or another coupling means.
  • the first unidirectional bearing holder (22) includes a plate (22A) and a holding part (22B) protruding downwardly from the plate (22A), into which a first unidirectional bearing (23) is press-fit.
  • the outer race of the first unidirectional bearing (23) is fixed and coupled to the inner surface of the holding part (22B), and the upper portion of the shaft (13) is rotatably coupled to the inner race of the first unidirectional bearing (23).
  • the shaft (13) rotates together with the first fan (21), and when rotating in the other direction, only the shaft (13) rotates, whereas the first fan (21) does not rotate.
  • a first centering bracket (14) is coupled to the upper portion of the upper housing (11) of the body (10).
  • the first centering bracket (14) has a shaft through-hole (14A) in the center, into which the shaft (13) penetrates, and a first centering bearing holder (14B) to which a first centering bearing (141) for supporting the rotation of the holding part (22B) of the first unidirectional bearing holder (22) upon rotation is press-fit and coupled.
  • the outer diameter portion of the holding part (22B) is coupled to the inner race of the first centering bearing (141).
  • the first centering bearing holder (14B) is supported by a support member (14C), and the support member (14C) is coupled to the upper portion of the upper housing (11).
  • This structure can disperse the rotation load imposed on the first unidirectional bearing (23) to the first centering bearing (141) when the first fan (21) rotates in one direction at a high speed, and can maintain the rotation stably when the shaft (13) rotates in the other direction whereas the first fan (21) does not rotate.
  • the second fan unit (30) is located on the lower portion of the body (10), and comprises a second fan (31) coupled to the lower distal end of the shaft (13).
  • the second fan (31) may be an inhalation fan for a vacuum cleaner, but is not necessarily limited thereto. Accordingly, for the motor for dual fans (100) according to the present invention, the blower fan and the fan for the vacuum cleaner used in the vehicle may be driven with one motor.
  • the second fan (31) is configured to be disposed in a space between an upper case (34) and a lower case (36), as shown in Fig. 3.
  • the second fan (31) is coupled to a second unidirectional bearing holder (32) with a bolt (B) or another coupling means.
  • the second unidirectional bearing holder (32) includes a plate (32A) and a holding part (32B) protruding upwardly from the plate (32A).
  • a second unidirectional bearing (33) is press-fit and coupled to the inside of the holding part (32B).
  • the outer race of the second unidirectional bearing (33) is fixed and coupled to the holding part (32B), and the lower portion of the shaft (13) is rotatably coupled to the inner race of the second unidirectional bearing (33).
  • the motor for dual fans (100) can rotate one fan, while preventing the rotation of the other fan.
  • the shaft (13) rotates in the clockwise direction viewed from above, it may be implemented using the first and second unidirectional bearings (23, 33) so that the first fan (21) rotates together with the shaft (13) in the clockwise direction, and the second fan (31) does not rotate.
  • the shaft (13) rotates in the counter-clockwise direction it may be implemented so that only the second fan (31) rotates together with the shaft (13) in the counter-clockwise direction, and the first fan (21) does not rotate.
  • This constitution can drive two fans with one motor, while allowing one of the two fans to be driven and the other fan not to be driven.
  • a second centering bracket (15) is coupled to the lower portion of the lower housing (12) of the body (10).
  • the second centering bracket (15) has a shaft through-hole (15A) in the center, into which the shaft (13) penetrates, and a second centering bearing holder (15B) to which a second centering bearing (151) for supporting the rotation of the holding part (32B) of the second unidirectional bearing holder (32) upon rotation is press-fit and coupled.
  • the outer diameter portion of the holding part (32B) is coupled to the inner race of the second centering bearing (151).
  • the second centering bearing holder (15B) is supported by a support member (15C), and the support member (15C) is coupled to the lower portion of the lower housing (12).
  • This structure can maintain the rotation stably when only the shaft (13) rotates in one direction whereas the second fan (31) does not rotate, and can disperse the rotation load imposed on the second unidirectional bearing (33) to the second centering bearing (151) when the second fan (31) rotates in the other direction at a high speed.
  • the second fan (31) When used for a cleaner, the second fan (31) is disposed in a space between the upper case (34) and the lower case (36).
  • a central hole (34A) is formed in the center of the upper case (34), and an air discharging hole (34B) is formed in the side surface thereof.
  • the air guided by the second fan (31) is guided to the inside of the upper case (34) through a central hole (35A) of a flow path guiding plate (35) which is located in the upper side of the second fan (31) and coupled to the lower portion of the upper case (34), and discharged to the outside of the upper case (34) through the air discharging hole (34B).
  • a second fan cover (311) may be coupled to the lower portion of the second fan (31), and an opening (311A) that is an air flow path is formed in the center of the second fan cover (311).
  • the outside air is introduced into the lower case (36) through an opening (36A) of the lower case (36) from an inhalation flow path (37A) by operation of the second fan (31).
  • the inhalation flow path (37A) may be formed in a flow path support member (37), and the flow path support member (37) may be coupled to the lower housing (12).
  • Fig. 4 is a cross-sectional view of the motor for dual fans (100) according to the present invention.
  • a first centering bracket (14) is coupled to the upper portion of the upper housing (11) that forms the body (10).
  • a first centering bearing (141) is press-fit and coupled to a first centering bearing holder (14B) in the center of the first centering bracket (14).
  • the outer diameter surface of a holding part (22B) of a first unidirectional bearing holder (22) is rotatably coupled to the inner race of the first centering bearing (141).
  • the first unidirectional bearing holder (22) is coupled to the first fan (21) to rotate together.
  • a first unidirectional bearing (23) which is supported on the shaft (13) to be rotatable in only one direction is coupled to the holding part (22B).
  • a rotor (113) and a stator (114) that form a motor are disposed in a space between the upper housing (11) and the lower housing (12).
  • the rotor (113) is coupled to the shaft (13) so that the shaft (13) rotates, and is positioned in the outer circumferential surface of the stator (114) such that a rotor magnet (113A) faces the stator (114).
  • An insulator (114A) surrounds the upper and lower portions of the stator (114).
  • An upper bearing holder (40) for installing an upper bearing (111) may be press-fit and installed in the center of the upper portion of the stator (114).
  • An upper bearing press-fit part (41) is formed in the upper portion of the upper bearing holder (40) so that the upper bearing (111) is press-fit therein.
  • the upper bearing (111) may be installed to support the bidirectional rotation of the upper side of the shaft.
  • a lower bearing (112) may be installed in a lower bearing holder (15D) of a second centering bracket (15).
  • a second centering bracket (15) is formed in the lower portion of the lower housing (12).
  • a second centering bearing holder (15B) to which a second centering bearing (151) is coupled is formed in the lower portion of the second centering bracket (15).
  • the lower bearing holder (15D) may be formed in the upper portion of the second centering bearing holder (15B) such that the lower bearing (112) is coupled thereto.
  • a second unidirectional bearing holder (32) having a plate (32A) and a holding part (32B) is coupled to the upper portion in the center of the second fan (31).
  • a second unidirectional bearing (33) is coupled to the inside of the holding part (32B).
  • the outer surface of the holding part (32B) is coupled to the inner race of the second centering bearing (151) to support the rotation.
  • the air is guided to the inside of the lower case (36) through an inhalation flow path (37A) of a flow path support member (37) by operation of the second fan (31).
  • the air passing through a flow path guiding plate (35) is guided to the inside of the upper case (34) and discharged to the outside of the upper case (34) through an air discharging hole (34B). Accordingly, the second fan (31) can be used for a vacuum cleaner.
  • the first fan (21) When power is applied to the stator (114) and the rotor (113) rotates in one direction, the first fan (21) is driven, whereas the second fan (32) is not driven. Accordingly, the first fan (21) can be used for an air conditioning system to circulate air. When the rotor (113) rotates in the other direction, the first fan (21) is not driven, whereas the second fan (32) is driven. Accordingly, the second fan (32) can be used for a vacuum cleaner.
  • the motor for dual fans according to the present invention can separately operate loads of two different functions with one motor.
  • Fig. 5 is a cross-sectional view of the motor for dual fans (100) according to another embodiment of the present invention.
  • the motor for dual fans (100) according to another embodiment of the present invention is characterized by using a multiple bearing holder (50) for the motor for dual fans (100), instead of the aforementioned upper bearing holder (40).
  • the multiple bearing holder (50) serves the same function as the upper bearing holder (40) in supporting an upper bearing (111). However, the multiple bearing holder (50) long extending downwardly in a sleeve shape has a structure in which a lower bearing (112) and a second centering bearing (151) of the second fan unit (30) are fixed and installed in the lower portion of the multiple bearing holder.
  • the upper side of the multiple bearing holder (50) is press-fit into the inside of the stator (114), penetrates into a central hole (34A) of the upper case (35) and extends to a second unidirectional bearing (33) in the lower portion of the shaft (13).
  • a lower bearing press-fit part (52) may be formed in the lower side of the multiple bearing holder (50) so that the lower bearing (112) is press-fit and installed therein.
  • a second bearing press-fit part (53) may be formed in the lower portion of the lower bearing press-fit part (52) of the multiple bearing holder (50).
  • a second centering bearing (151) is press-fit and installed in the second bearing press-fit part (53).

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

The motor for dual fans according to the present invention comprises a body (10) which includes an upper housing (11) and a lower housing (12) and has a stator installed therein; a shaft (13) which is coupled to a rotor located to be opposite to the stator to rotate together and is extended to an upper portion and a lower portion of the body (10); a first fan (21) which is coupled to an upper portion of the shaft (13); and a second fan (31) which is coupled to a lower portion of the shaft (13), characterized in that a first unidirectional bearing (23) is coupled to the first fan (21), and thereby an inner race of the first unidirectional bearing (23) is rotatably coupled to an upper portion of the shaft (31), a second unidirectional bearing (33) is coupled to the second fan (31), and thereby an inner race of the second unidirectional bearing (33) is rotatably coupled to a lower portion of the shaft (13), and the first unidirectional bearing (23) is press-fit into a holding part (22B) of a first unidirectional bearing holder (22) coupled to a central portion of the first fan (21), and an outer surface of the holding part (22B) is rotatably coupled to a first centering bearing (141), wherein the first centering bearing (141) is coupled to a first centering bracket (14) coupled to the upper housing (11).

Description

MOTOR FOR DUAL FANS WITH ONE SHAFT
The present invention relates to a motor for dual fans. More specifically, the present invention relates to a motor for dual fans capable of coupling two loads to one motor shaft, while operating each load separately, and holding the shaft in a regular position.
In general, vehicles have fan motors for heating ventilation and air conditioning applied thereto to circulate the indoor air. These fan motors for heating ventilation and air conditioning are located in the front of the vehicles where the air conditioner or heater is located. However, recently, as cars become larger, and vehicles for leisure or sport utility vehicles have spacious interior, fan motors for heating ventilation and air conditioning are also applied in the backseats or trunks of the vehicles. Meanwhile, recently, as for the case of premium vehicles for leisure or sport utility vehicles, vacuum cleaners for cleaning the vehicles are sometimes installed in the trunk side. These vacuum cleaners need fan motors for inhaling dust.
When a heating ventilation and air conditioning (HVAC) system for circulating the air is applied together with the vacuum cleaner in one vehicle, a fan motor for the HVAC and a fan motor for the cleaner should be applied separately. If these two motors are applied separately, the manufacturing costs would increase, and there could be certain restrictions in the space design for two motors. Accordingly, if a fan for the cleaner is added to the fan motor used in the HVAC system so that one motor is used for two instruments, the above-mentioned problem could be solved.
US Patent No. 6,896,478 discloses a dual fan blower which axially connects two fans to one motor, and circulates the air through a chamber on which each fan is located. Said patent discloses a technology that when one motor shaft rotates, two fans coupled to both ends of the motor shaft, respectively, rotate together so as to operate two fans with one motor at the same time. However, since the two fans always have to be operated together, when the dual fan blower is applied to the device for heating ventilation and air conditioning and the vacuum cleaner at the same time, the fan of the air conditioner and the fan of the cleaner always have to be operated at the same time, thereby raising a problem in the application thereof.
Meanwhile, only one load rotates while both ends of the one shaft are loaded. Thus, if the shaft is not retained in a regular position upon high speed rotation of the shaft, unnecessary loads are imposed on bearings for supporting the shaft or other components, resulting in failure or malfunction of the motor. Therefore, in order to prevent such failure or malfunction, a structure for holding the shaft in a regular position is required.
In order to solve the above-mentioned problem, the present inventors suggest a motor for dual fans capable of coupling two fans to one motor shaft, while selectively driving two fans without rotating them at the same time, and holding the shaft in a regular position.
It is an object of the present invention to provide a motor for dual fans capable of selectively driving two fans with one motor.
It is another object of the present invention to provide a motor for dual fans capable of coupling a cleaning inhalation fan to a shaft of the motor for heating ventilation and air conditioning on which a blower fan is mounted, thereby enabling the motor to be used for both the device for heating ventilation and air conditioning and the cleaner.
It is another object of the present invention to provide a fan of a structure capable of holding a shaft in a regular position.
The objects above and other objects inferred therein can be easily achieved by the present invention explained below.
The motor for dual fans according to the present invention comprises a body (10) which includes an upper housing (11) and a lower housing (12) and has a stator installed therein; a shaft (13) which is coupled to a rotor located to be opposite to the stator to rotate together and is extended to an upper portion and a lower portion of the body (10); a first fan (21) which is coupled to an upper portion of the shaft (13); and a second fan (31) which is coupled to a lower portion of the shaft (13), characterized in that a first unidirectional bearing (23) is coupled to the first fan (21), and thereby an inner race of the first unidirectional bearing (23) is rotatably coupled to an upper portion of the shaft (31), a second unidirectional bearing (33) is coupled to the second fan (31), and thereby an inner race of the second unidirectional bearing (33) is rotatably coupled to a lower portion of the shaft (13), and the first unidirectional bearing (23) is press-fit into a holding part (22B) of a first unidirectional bearing holder (22) coupled to a central portion of the first fan (21), and an outer surface of the holding part (22B) is rotatably coupled to a first centering bearing (141), wherein the first centering bearing (141) is coupled to a first centering bracket (14) coupled to the upper housing (11).
In the present invention, the second unidirectional bearing (33) is press-fit and installed in a holding part (32B) of a second unidirectional bearing holder (32) coupled to a central portion of the second fan (31), and an outer surface of the holding part (32B) is rotatably coupled to a second centering bearing (151), wherein the second centering bearing (151) may be coupled to a second centering bracket (15) coupled to the lower housing (12).
In the present invention, the motor for dual fans may further comprise a lower bearing (112) for supporting the rotation of the shaft, which is coupled to the second centering bracket (15) and located in an upper portion of the second centering bearing (151).
In the present invention, preferably, the motor for dual fans further comprises a multiple bearing holder (50) which is press-fit and installed in the center of the stator (114), wherein the second unidirectional bearing (33) is press-fit and installed in a holding part (32B) of a second unidirectional bearing holder (32) coupled to a central portion of the second fan (31), an upper bearing press-fit part (51) in which an upper bearing (111) for supporting the rotation of the shaft (13) is installed is formed in an upper portion of the multiple bearing holder (50), the multiple bearing holder (50) is extended to the second unidirectional bearing holder (32), and a second bearing press-fit part (53) in which a second centering bearing (151) to which an outer surface of the holding part (32B) is rotatably coupled is installed is formed in a lower portion of the multiple bearing holder (50).
In the present invention, preferably, a lower bearing press-fit part (52) in which a lower bearing (112) for supporting the rotation of the shaft (13) is press-fit and installed is formed in an upper portion of the second centering bearing press-fit part (53) of the multiple bearing holder (50).
The present invention has the effect of providing a motor for dual fans capable of selectively driving two fans with one motor and holding a shaft in a stable position. Furthermore, the present invention has the effect of providing a motor for dual fans capable of applying a cleaning inhalation fan to a shaft of the fan motor for heating ventilation and air conditioning on which a blower fan is mounted so that the motor can be used for both the device for heating ventilation and air conditioning and the cleaner, thereby saving the space to have the motor installed in the vehicle and costs, and reducing electric power consumed in the vehicle.
Fig. 1 is a perspective view of the motor for dual fans according to the present invention;
Fig. 2 is a top exploded perspective view of the motor for dual fans according to the present invention;
Fig. 3 is a bottom exploded perspective view of the motor for dual fans according to the present invention;
Fig. 4 is a cross-sectional view of the motor for dual fans according to the present invention; and
Fig. 5 is a cross-sectional view of the motor for dual fans according to another embodiment of the present invention.
Hereinafter, the present invention will be explained in detail with reference to the accompanied drawings.
Fig. 1 is a perspective view of the motor for dual fans (100) according to the present invention, Fig. 2 is a top exploded perspective view of the first fan unit (20) of the motor for dual fans (100) according to the present invention, and Fig. 3 is a bottom exploded perspective view of the second fan unit (30) of the motor for dual fans (100) according to the present invention. When referring to Figs. 1 to 3 together, the motor for dual fans according to the present invention comprises a body (10), a first fan unit (20), and a second fan unit (30).
The body (10) comprises an upper housing (11) and a lower housing (12), and a shaft (13) penetrates into a central portion of the body. The upper portion and lower portion of the shaft (13) protrude upwardly and downwardly from the upper housing (11) and the lower housing (12), respectively, and loads are coupled to the upper and lower portions of the shaft (13), respectively. In the present invention, two fans are coupled to the upper and lower portions of the shaft (13), respectively. As shown in Fig. 2, a first fan (21) is coupled to the upper portion of the shaft (13), and as shown in Fig. 3, a second fan (31) is coupled to the lower portion of the shaft (13).
The first fan unit (20) is located on the upper portion of the body (10), and comprises a first fan (21) coupled to the upper portion of the shaft (13). Preferably, the first fan (21) may be a blower fan of the device for heating ventilation and air conditioning in a vehicle, but is not necessarily limited thereto. A central fixing part (211) is positioned in the center of the first fan (21), and a first unidirectional bearing holder (22) is coupled to the lower side of the central fixing part (211) with a bolt (B) or another coupling means. The first unidirectional bearing holder (22) includes a plate (22A) and a holding part (22B) protruding downwardly from the plate (22A), into which a first unidirectional bearing (23) is press-fit. The outer race of the first unidirectional bearing (23) is fixed and coupled to the inner surface of the holding part (22B), and the upper portion of the shaft (13) is rotatably coupled to the inner race of the first unidirectional bearing (23). When rotating in one direction, the shaft (13) rotates together with the first fan (21), and when rotating in the other direction, only the shaft (13) rotates, whereas the first fan (21) does not rotate.
A first centering bracket (14) is coupled to the upper portion of the upper housing (11) of the body (10). The first centering bracket (14) has a shaft through-hole (14A) in the center, into which the shaft (13) penetrates, and a first centering bearing holder (14B) to which a first centering bearing (141) for supporting the rotation of the holding part (22B) of the first unidirectional bearing holder (22) upon rotation is press-fit and coupled. The outer diameter portion of the holding part (22B) is coupled to the inner race of the first centering bearing (141).
The first centering bearing holder (14B) is supported by a support member (14C), and the support member (14C) is coupled to the upper portion of the upper housing (11). This structure can disperse the rotation load imposed on the first unidirectional bearing (23) to the first centering bearing (141) when the first fan (21) rotates in one direction at a high speed, and can maintain the rotation stably when the shaft (13) rotates in the other direction whereas the first fan (21) does not rotate.
The second fan unit (30) is located on the lower portion of the body (10), and comprises a second fan (31) coupled to the lower distal end of the shaft (13). As shown in Fig. 3, preferably, the second fan (31) may be an inhalation fan for a vacuum cleaner, but is not necessarily limited thereto. Accordingly, for the motor for dual fans (100) according to the present invention, the blower fan and the fan for the vacuum cleaner used in the vehicle may be driven with one motor. When the second fan (31) is used for the cleaner, the second fan (31) is configured to be disposed in a space between an upper case (34) and a lower case (36), as shown in Fig. 3.
The second fan (31) is coupled to a second unidirectional bearing holder (32) with a bolt (B) or another coupling means. The second unidirectional bearing holder (32) includes a plate (32A) and a holding part (32B) protruding upwardly from the plate (32A). A second unidirectional bearing (33) is press-fit and coupled to the inside of the holding part (32B). The outer race of the second unidirectional bearing (33) is fixed and coupled to the holding part (32B), and the lower portion of the shaft (13) is rotatably coupled to the inner race of the second unidirectional bearing (33). When the shaft (13) rotates in one direction, the second fan (31) does not rotate by the second unidirectional bearing (33), and when the shaft (13) rotates in the other direction, the second fan (31) rotates together with the shaft.
With this constitution, the motor for dual fans (100) according to the present invention can rotate one fan, while preventing the rotation of the other fan. For example, when the shaft (13) rotates in the clockwise direction, viewed from above, it may be implemented using the first and second unidirectional bearings (23, 33) so that the first fan (21) rotates together with the shaft (13) in the clockwise direction, and the second fan (31) does not rotate. Or, when the shaft (13) rotates in the counter-clockwise direction, it may be implemented so that only the second fan (31) rotates together with the shaft (13) in the counter-clockwise direction, and the first fan (21) does not rotate. This constitution can drive two fans with one motor, while allowing one of the two fans to be driven and the other fan not to be driven.
A second centering bracket (15) is coupled to the lower portion of the lower housing (12) of the body (10). The second centering bracket (15) has a shaft through-hole (15A) in the center, into which the shaft (13) penetrates, and a second centering bearing holder (15B) to which a second centering bearing (151) for supporting the rotation of the holding part (32B) of the second unidirectional bearing holder (32) upon rotation is press-fit and coupled. The outer diameter portion of the holding part (32B) is coupled to the inner race of the second centering bearing (151).
The second centering bearing holder (15B) is supported by a support member (15C), and the support member (15C) is coupled to the lower portion of the lower housing (12). This structure can maintain the rotation stably when only the shaft (13) rotates in one direction whereas the second fan (31) does not rotate, and can disperse the rotation load imposed on the second unidirectional bearing (33) to the second centering bearing (151) when the second fan (31) rotates in the other direction at a high speed.
When used for a cleaner, the second fan (31) is disposed in a space between the upper case (34) and the lower case (36). A central hole (34A) is formed in the center of the upper case (34), and an air discharging hole (34B) is formed in the side surface thereof. The air guided by the second fan (31) is guided to the inside of the upper case (34) through a central hole (35A) of a flow path guiding plate (35) which is located in the upper side of the second fan (31) and coupled to the lower portion of the upper case (34), and discharged to the outside of the upper case (34) through the air discharging hole (34B). A second fan cover (311) may be coupled to the lower portion of the second fan (31), and an opening (311A) that is an air flow path is formed in the center of the second fan cover (311).
The outside air is introduced into the lower case (36) through an opening (36A) of the lower case (36) from an inhalation flow path (37A) by operation of the second fan (31). The inhalation flow path (37A) may be formed in a flow path support member (37), and the flow path support member (37) may be coupled to the lower housing (12).
Fig. 4 is a cross-sectional view of the motor for dual fans (100) according to the present invention. Referring to Fig. 4, a first centering bracket (14) is coupled to the upper portion of the upper housing (11) that forms the body (10). A first centering bearing (141) is press-fit and coupled to a first centering bearing holder (14B) in the center of the first centering bracket (14). The outer diameter surface of a holding part (22B) of a first unidirectional bearing holder (22) is rotatably coupled to the inner race of the first centering bearing (141). The first unidirectional bearing holder (22) is coupled to the first fan (21) to rotate together. A first unidirectional bearing (23) which is supported on the shaft (13) to be rotatable in only one direction is coupled to the holding part (22B).
A rotor (113) and a stator (114) that form a motor are disposed in a space between the upper housing (11) and the lower housing (12). The rotor (113) is coupled to the shaft (13) so that the shaft (13) rotates, and is positioned in the outer circumferential surface of the stator (114) such that a rotor magnet (113A) faces the stator (114). An insulator (114A) surrounds the upper and lower portions of the stator (114). An upper bearing holder (40) for installing an upper bearing (111) may be press-fit and installed in the center of the upper portion of the stator (114). An upper bearing press-fit part (41) is formed in the upper portion of the upper bearing holder (40) so that the upper bearing (111) is press-fit therein. The upper bearing (111) may be installed to support the bidirectional rotation of the upper side of the shaft. In order to support the bidirectional rotation of the lower side of the shaft (13), a lower bearing (112) may be installed in a lower bearing holder (15D) of a second centering bracket (15).
A second centering bracket (15) is formed in the lower portion of the lower housing (12). A second centering bearing holder (15B) to which a second centering bearing (151) is coupled is formed in the lower portion of the second centering bracket (15). The lower bearing holder (15D) may be formed in the upper portion of the second centering bearing holder (15B) such that the lower bearing (112) is coupled thereto. A second unidirectional bearing holder (32) having a plate (32A) and a holding part (32B) is coupled to the upper portion in the center of the second fan (31). A second unidirectional bearing (33) is coupled to the inside of the holding part (32B). The outer surface of the holding part (32B) is coupled to the inner race of the second centering bearing (151) to support the rotation.
The air is guided to the inside of the lower case (36) through an inhalation flow path (37A) of a flow path support member (37) by operation of the second fan (31). The air passing through a flow path guiding plate (35) is guided to the inside of the upper case (34) and discharged to the outside of the upper case (34) through an air discharging hole (34B). Accordingly, the second fan (31) can be used for a vacuum cleaner.
When power is applied to the stator (114) and the rotor (113) rotates in one direction, the first fan (21) is driven, whereas the second fan (32) is not driven. Accordingly, the first fan (21) can be used for an air conditioning system to circulate air. When the rotor (113) rotates in the other direction, the first fan (21) is not driven, whereas the second fan (32) is driven. Accordingly, the second fan (32) can be used for a vacuum cleaner. As such, the motor for dual fans according to the present invention can separately operate loads of two different functions with one motor.
Fig. 5 is a cross-sectional view of the motor for dual fans (100) according to another embodiment of the present invention. Referring to Fig. 5, the motor for dual fans (100) according to another embodiment of the present invention is characterized by using a multiple bearing holder (50) for the motor for dual fans (100), instead of the aforementioned upper bearing holder (40).
The multiple bearing holder (50) serves the same function as the upper bearing holder (40) in supporting an upper bearing (111). However, the multiple bearing holder (50) long extending downwardly in a sleeve shape has a structure in which a lower bearing (112) and a second centering bearing (151) of the second fan unit (30) are fixed and installed in the lower portion of the multiple bearing holder. The upper side of the multiple bearing holder (50) is press-fit into the inside of the stator (114), penetrates into a central hole (34A) of the upper case (35) and extends to a second unidirectional bearing (33) in the lower portion of the shaft (13). A lower bearing press-fit part (52) may be formed in the lower side of the multiple bearing holder (50) so that the lower bearing (112) is press-fit and installed therein. Also, a second bearing press-fit part (53) may be formed in the lower portion of the lower bearing press-fit part (52) of the multiple bearing holder (50). A second centering bearing (151) is press-fit and installed in the second bearing press-fit part (53). Thus, when compared to the previous embodiment, the motor for dual fans according to another embodiment of the present invention does not have to install the second centering bracket (15), and thus can reduce the number of components and streamline the assembling process. The constitution other than this is the same as the previous embodiment.
The detailed description of the present invention described as above simply explains examples for understanding the present invention, but does not intend to limit the scope of the present invention. The scope of the present invention is defined by the accompanying claims. Additionally, it should be construed that simple modifications or changes of the present invention fall within the scope of the present invention.

Claims (7)

  1. A motor for dual fans, comprising:
    a body (10) which includes an upper housing (11) and a lower housing (12) and has a stator installed therein;
    a shaft (13) which is coupled to a rotor located to be opposite to the stator to rotate together and is extended to an upper portion and a lower portion of the body (10);
    a first fan (21) which is coupled to an upper portion of the shaft (13); and
    a second fan (31) which is coupled to a lower portion of the shaft (13),
    characterized in that a first unidirectional bearing (23) is coupled to the first fan (21), and thereby an inner race of the first unidirectional bearing (23) is rotatably coupled to an upper portion of the shaft (31),
    a second unidirectional bearing (33) is coupled to the second fan (31), and thereby an inner race of the second unidirectional bearing (33) is rotatably coupled to a lower portion of the shaft (13), and
    the first unidirectional bearing (23) is press-fit into a holding part (22B) of a first unidirectional bearing holder (22) coupled to a central portion of the first fan (21), and an outer surface of the holding part (22B) is rotatably coupled to a first centering bearing (141), wherein the first centering bearing (141) is coupled to a first centering bracket (14) coupled to the upper housing (11).
  2. The motor for dual fans according to claim 1, characterized in that the second unidirectional bearing (33) is press-fit and installed in a holding part (32B) of a second unidirectional bearing holder (32) coupled to a central portion of the second fan (31), and an outer surface of the holding part (32B) is rotatably coupled to a second centering bearing (151), wherein the second centering bearing (151) is coupled to a second centering bracket (15) coupled to the lower housing (12).
  3. The motor for dual fans according to claim 2, characterized by further comprising a lower bearing (112) for supporting the rotation of the shaft, which is coupled to the second centering bracket (15) and located in an upper portion of the second centering bearing (151).
  4. The motor for dual fans according to claim 2, characterized by further comprising:
    an upper case (34) which is coupled to a lower portion of the lower housing (12); and
    a lower case (36) which is coupled to a lower portion of the upper case (34),
    wherein the second fan (31) is disposed in a space between the upper case (34) and the lower case (36).
  5. The motor for dual fans according to claim 1, characterized in that an upper bearing holder (40) is press-fit and installed in the center of the stator (114), and an upper bearing press-fit part (41) in which an upper bearing (111) for supporting the rotation of the shaft (13) is installed is formed in an upper portion of the upper bearing holder (40).
  6. The motor for dual fans according to claim 1, characterized by further comprising:
    a multiple bearing holder (50) which is press-fit and installed in the center of the stator (114),
    wherein the second unidirectional bearing (33) is press-fit and installed in a holding part (32B) of a second unidirectional bearing holder (32) coupled to a central portion of the second fan (31), an upper bearing press-fit part (51) in which an upper bearing (111) for supporting the rotation of the shaft (13) is installed is formed in an upper portion of the multiple bearing holder (50), the multiple bearing holder (50) is extended to the second unidirectional bearing holder (32), and a second bearing press-fit part (53) in which a second centering bearing (151) to which an outer surface of the holding part (32B) is rotatably coupled is installed is formed in a lower portion of the multiple bearing holder (50).
  7. The motor for dual fans according to claim 6, characterized in that a lower bearing press-fit part (52) in which a lower bearing (112) for supporting the rotation of the shaft (13) is press-fit and installed is formed in an upper portion of the second centering bearing press-fit part (53) of the multiple bearing holder (50).
PCT/KR2019/005903 2018-07-30 2019-05-17 Motor for dual fans with one shaft WO2020027411A1 (en)

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KR1020180088728A KR101995440B1 (en) 2018-07-30 2018-07-30 Motor for Dual Fans with One Shaft
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000016069A (en) * 1998-07-06 2000-01-18 Matsushita Electric Ind Co Ltd Ceiling-mounted cooling unit for automobile
KR20050023166A (en) * 2003-08-27 2005-03-09 최진민 Pump for discharging water both direction having two impeller
KR20060128700A (en) * 2005-06-10 2006-12-14 덴소 써멀 시스템즈 에스피에이 Double fan ventilation assembly for vehicles
JP2009513192A (en) * 2005-10-28 2009-04-02 レスメド・リミテッド Blower motor with flexible support sleeve
JP2016059276A (en) * 2007-06-05 2016-04-21 レスメド・モーター・テクノロジーズ・インコーポレーテッド Blower with bearing tube

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000016069A (en) * 1998-07-06 2000-01-18 Matsushita Electric Ind Co Ltd Ceiling-mounted cooling unit for automobile
KR20050023166A (en) * 2003-08-27 2005-03-09 최진민 Pump for discharging water both direction having two impeller
KR20060128700A (en) * 2005-06-10 2006-12-14 덴소 써멀 시스템즈 에스피에이 Double fan ventilation assembly for vehicles
JP2009513192A (en) * 2005-10-28 2009-04-02 レスメド・リミテッド Blower motor with flexible support sleeve
JP2016059276A (en) * 2007-06-05 2016-04-21 レスメド・モーター・テクノロジーズ・インコーポレーテッド Blower with bearing tube

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