WO2024063311A1 - Motor for washing machine - Google Patents

Motor for washing machine Download PDF

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Publication number
WO2024063311A1
WO2024063311A1 PCT/KR2023/011074 KR2023011074W WO2024063311A1 WO 2024063311 A1 WO2024063311 A1 WO 2024063311A1 KR 2023011074 W KR2023011074 W KR 2023011074W WO 2024063311 A1 WO2024063311 A1 WO 2024063311A1
Authority
WO
WIPO (PCT)
Prior art keywords
motor
circuit board
printed circuit
positioning
coupling member
Prior art date
Application number
PCT/KR2023/011074
Other languages
French (fr)
Inventor
Jeong Cheol Jang
Gyeong Sik Yang
Seung Ju Park
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 WO2024063311A1 publication Critical patent/WO2024063311A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/20—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for measuring, monitoring, testing, protecting or switching
    • H02K11/21—Devices for sensing speed or position, or actuated thereby
    • H02K11/215—Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
    • D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K29/00—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices
    • H02K29/06—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices
    • H02K29/08—Motors or generators having non-mechanical commutating devices, e.g. discharge tubes or semiconductor devices with position sensing devices using magnetic effect devices, e.g. Hall-plates, magneto-resistors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K2211/00—Specific aspects not provided for in the other groups of this subclass relating to measuring or protective devices or electric components
    • H02K2211/03—Machines characterised by circuit boards, e.g. pcb

Definitions

  • the present invention relates to a motor. More specifically, the present invention relates to a BLDC motor for a washing machine which assembles a printed circuit board having a Hall sensor IC mounted thereon by surface mount technology using a surface mount device (SMD) to a front insulator, thereby reducing the length of the motor, and also reducing the number of components required for Hall sensing and thus saving the costs for manufacturing the motor.
  • SMD surface mount device
  • a motor is an electrical machine that converts the electrical energy into mechanical energy to generate a torque, which is used widely in industrial apparatuses as well as household appliances.
  • Korean Patent No. 10-1707142 suggests a BLDC motor (brushless motor) comprising: a stator core to which a front insulator and a rear insulator are coupled; a front housing and a rear housing for storing the stator core, in which legs are fixed; and a rotor which is positioned inside the stator core in the front and rear housings to rotate, having a shaft formed through the center thereof to be coupled thereto.
  • Such motors have a circuit for controlling a rotating magnetic field by detecting a magnetic flux using a sensor magnet without a commutator. The sensor magnet is coupled to an end of the shaft of the motor.
  • a motor using a sensor magnet has the same features as a brush-type motor by fixing the sensor magnet to the back end of the shaft inside the rear housing using a bolt and mounting a Hall sensor for detecting the rotation of the sensor magnet on a printed circuit board in the inner surface of the rear housing in a DIM type, as disclosed in Japanese Patent Laid-Open No. 2013-7731.
  • the prior art may have the effect of improving the detection of rotation position of a rotor, but requires a fixing bolt for fixing a sensor magnet to a shaft and a separate fixing bolt for fixing a sensor assembly including a printed circuit board having a Hall sensor mounted thereon and a sensor cover, thereby causing an increase in the manufacturing costs due to the material costs and processing costs for assembling components, and leading to a complicate assembly process and decreasing production efficiency.
  • the motor has a long length and an increased weight, which makes it difficult to secure a space for installing the motor in a washing machine and install the motor.
  • the present inventors suggest a motor for a washing machine having a novel structure.
  • a motor 100 for a washing machine assembles a printed circuit board 60 having a Hall sensor IC 61 mounted thereon to a front insulator 21 using a coupling member 21A extending and protruding forwardly of one side of the front insulator 21 of a stator core 20, to be positioned in a front housing 11 without disturbing the rotation of a rotor 40.
  • the Hall sensor IC 61 mounted on the printed circuit board 60 may be mounted on the printed circuit board 60 by surface mount technology using a surface mount device (SMD).
  • SMD surface mount device
  • the coupling member 21A may comprise two outer fitting protrusions 210A, 210B integrally protruding forwardly of a back yoke insulating part 210 of the front insulator 21; and a positioning and inner fitting protrusion 212A protruding forwardly of a winding guide insulating part 212 of the front insulator 21.
  • the printed circuit board 60 coupled to the coupling member 21A may have two outer fitting holes 611, 612 corresponding to the two outer fitting protrusions 210A, 210B integrally protruding forwardly of the back yoke insulating part 210 and an inner fitting hole 613 corresponding to the positioning and inner fitting protrusion 212A protruding forwardly of the winding guide insulating part 212.
  • the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A have locking and seating stops 210A', 210B', 212A', respectively, inclined in the outside of the front thereof, protruding outwardly, and inclined surfaces 210A'', 210B'', 212A'' of the respective locking and seating stops 210A', 210B', 212A' have the lower front and higher back.
  • locking steps 210A''', 210B''', 212A''' in the back of the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A have non-slip embossing parts 210A'''', 210B'''', 212A''''.
  • a vibration absorbing pad P may be inserted into each of fitting recesses 210A-1, 210B-1, 212A-1 formed in both outer ends of the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A, respectively, of the coupling member 21A.
  • the present invention assembles a printed circuit board having a SMD type Hall sensor IC mounted thereon to a front insulator, capable of shortening an assembly process and improving the productivity of a motor, and reducing the number of components such as a separate Hall sensor cover, a printed circuit board stored in the Hall sensor cover, a sensor magnet, a fixing bolt for fixing these components, etc., thereby saving the material costs and also significantly reducing the weight of a motor, resulting in lower costs for manufacturing a motor.
  • the present invention uses a printed circuit board having a SMD type Hall sensor IC mounted thereon, thereby reducing the processing costs to be incurred to assemble the Hall sensor IC.
  • the present invention allows the printed circuit board having a Hall sensor IC mounted thereon to be positioned in the front housing without disturbing the rotation of a rotor, thereby making a compact motor, and thus minimizing a space for installing the motor.
  • Fig. 1 is a front perspective view of a motor for a washing machine according to the present invention
  • Fig. 2 is an exploded perspective view of a motor for a washing machine according to the present invention
  • Fig. 3 is an overall cross-sectional view of a motor for a washing machine according to the present invention.
  • Fig. 4 is an exploded perspective view of a main part of a motor for a washing machine according to the present invention.
  • Fig. 5 is a side view of the internal state of a motor for a washing machine according to the present invention.
  • Fig. 6 is a view for explaining another embodiment of a coupling member 21A according to the present invention
  • Fig. 6(a) is a perspective view of a printed circuit board
  • Fig. 6(b) is a cross-sectional view taken along line A-A of Fig. 6(a);
  • Fig. 6(c) is a cross-sectional view taken along line B-B of Fig. 6(b); and
  • Fig. 7 is a view for explaining another embodiment of a coupling member 21A according to the present invention
  • Fig. 7(a) is an exploded perspective view of the coupling member
  • Fig. 7(b) is a cross-sectional view of Fig. 7(a).
  • Fig. 1 is a front perspective view of a motor 100 for a washing machine according to the present invention
  • Fig. 2 is an exploded perspective view of the motor 100 for a washing machine according to the present invention
  • Fig. 3 is an overall cross-sectional view of the motor 100 for a washing machine according to the present invention
  • Fig. 4 is an exploded perspective view of a main part of the motor 100 for a washing machine according to the present invention.
  • the motor 100 comprises a stator core 20 interposed and assembled between a front housing 11 and a rear housing 12 formed by aluminum die casting, a front insulator 21 and a rear insulator 22 being coupled to the front and back thereof; and a rotor 40 positioned inside the stator core 20 to rotate, having a shaft 30 formed through the center thereof to be coupled thereto.
  • the stator core 20 includes back yokes 20A and teeth 20B.
  • the front insulator 21 and the rear insulator 22 include back yoke insulating parts 210, 220, winding guide insulating parts 212, 222, and tooth insulating parts 211, 221.
  • a drive pulley 31 coupled to the front of the shaft 30 rotates together with the shaft 30 to drive a drum (not shown) of a washing machine or a drying machine through a belt (not shown).
  • Reference numeral 20-1 in the drawings refers to a coil winding part; 32 and 33 refer to a front bearing and a rear bearing, respectively; and 50 refers to a power connection part.
  • Front and rear fixing brackets 11-1, 12-1 are formed in the front housing 11 and rear housing 12, respectively, to support the motor 100 on the bottom surface.
  • the present invention mainly describes "a motor for a washing machine", but is not necessarily limited to a motor for a washing machine.
  • the present invention may also apply to a drying machine for laundry or a motor for other use.
  • the present invention may assemble a printed circuit board 60 having a SMD type Hall sensor IC 61 mounted thereon to the front insulator 21 of the stator core 20 without disturbing the rotation of the rotor 40, to detect the rotation position of the rotor 40.
  • a terminal of the Hall sensor IC 61 mounted on the printed circuit board 60 is connected to a coil of the coil winding part 20-1 to determine the current direction of the stator winding. Accordingly, a BLDC motor for a washing machine having the features of a brush type motor can be provided.
  • the present invention having the above configuration assembles the printed circuit board 60 having the Hall sensor IC 61 mounted thereon to the front insulator 21 using a coupling member 21A protruding forwardly of one side of the front insulator 21, to be positioned inside the front housing 11 without disturbing the rotation of the rotor 40, as shown in the side view of Fig. 5.
  • the Hall sensor IC 61 is mounted on the printed circuit board 60 by surface mount technology using a SMD.
  • the coupling member 21A comprises two outer fitting protrusions 210A, 210B integrally protruding forwardly of the back yoke insulating part 210 of the front insulator 21; and a positioning and inner fitting protrusion 212A protruding forwardly of the winding guide insulating part 212 of the front insulator 21, wherein preferably, the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A are positioned at the three vertices of a triangle shape with the center of the positioning and inner fitting protrusion 212A.
  • the present invention may minimize a space for installing the printed circuit board 60 by forming the coupling member 21A at one side of the outer circumference of the back yoke insulating part 210 and one side of the inner circumference of the winding guide insulating part 212 of the front insulator 21, not in the overall outer circumference of the back yoke insulating part 210 and the overall inner circumference of the winding guide insulating part 212 of the front insulator 21.
  • the printed circuit board 60 coupled to the coupling member 21A has two outer fitting holes 611, 612 corresponding to the two outer fitting protrusions 210A, 210B integrally protruding forwardly of the back yoke insulating part 210 and an inner fitting hole 613 corresponding to the positioning and inner fitting protrusion 212A protruding forwardly of the winding guide insulating part 212.
  • the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A are fitted into the two outer fitting holes 611, 612 and the inner fitting hole 613 to be assembled.
  • the inner circumference of the printed circuit board 60 is installed within a range not deviating from the winding guide insulating part 212, such that the printed circuit board 60 is installed without disturbing the rotation of the rotor 40.
  • the positioning and inner fitting protrusion 212A is positioned at the inner vertex between the outer fitting protrusion 210A and the outer fitting protrusion 210B.
  • the positioning and inner fitting protrusion 212A is fitted into the inner fitting hole 613, the outer fitting protrusion 210A and the outer fitting protrusion 210B are easily fitted into the outer fitting holes 611, 612, such that the printed circuit board 60 is positioned, thereby allowing for quick assembling.
  • the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A have locking and seating stops 210A', 210B', 212A', respectively, inclined in the outside of the front thereof, protruding outwardly.
  • the inclined surfaces 210A'', 210B'', 212A'' of the respective locking and seating stops 210A', 210B', 212A' have the lower front and higher back.
  • the locking and seating stops 210A', 210B', 212A' may be configured to have elasticity or the locking and seating stops 210A', 210B', 212A' may be made of a synthetic resin having elasticity.
  • Fig. 6 is a view for explaining another embodiment of a coupling member 21A according to the present invention
  • Fig. 6(a) is a perspective view of a printed circuit board
  • Fig. 6(b) is a cross-sectional view taken along line A-A of Fig. 6(a)
  • Fig. 6(c) is a cross-sectional view taken along line B-B of Fig. 6(b).
  • Locking steps 210A''', 210B''', 212A''' in the back of the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A have non-slip embossing parts 210A'''', 210B'''', 212A'''', respectively, such that the rear surface of the printed circuit board 60 is in contact with the non-slip embossing parts 210A'''', 210B'''', 212A'''', after assembling the printed circuit board 60. Accordingly, the vibration that may occur while the printed circuit board 60 shakes due to vibration occurring when the motor 100 is driven is absorbed and the noise is prevented. Or, the separation of the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A is prevented, which is caused by the shaking of the printed circuit board 60 due to vibration occurring when the motor 100 is driven.
  • Fig. 7 is a view for explaining another embodiment of a coupling member 21A according to the present invention
  • Fig. 7(a) is an exploded perspective view of the coupling member
  • Fig. 7(b) is a cross-sectional view of Fig. 7(a).
  • a vibration absorbing pad P is inserted into each of fitting recesses 210A-1, 210B-1, 212A-1 formed in both outer ends of the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A, respectively, of the coupling member 21A.
  • the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A are fitted into the outer fitting holes 611, 612 and the inner fitting hole 613, the outer circumferential surface of the vibration absorbing pad P is in contact with the inner surface of the outer fitting holes 611, 612 and the inner fitting hole 613.
  • the vibration absorbing pad P absorbs vibration that may occur while the printed circuit board 60 shakes due to vibration occurring when the motor 100 is driven, thereby preventing noise.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Textile Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)

Abstract

A motor for a washing machine according to the present invention assembles a printed circuit board (60) having a Hall sensor IC (61) mounted thereon to a front insulator (21) using a coupling member (21A) extending and protruding forwardly of one side of the front insulator (21) of a stator core (20), to be positioned in a front housing (11).

Description

MOTOR FOR WASHING MACHINE
The present invention relates to a motor. More specifically, the present invention relates to a BLDC motor for a washing machine which assembles a printed circuit board having a Hall sensor IC mounted thereon by surface mount technology using a surface mount device (SMD) to a front insulator, thereby reducing the length of the motor, and also reducing the number of components required for Hall sensing and thus saving the costs for manufacturing the motor.
In general, a motor is an electrical machine that converts the electrical energy into mechanical energy to generate a torque, which is used widely in industrial apparatuses as well as household appliances.
As to a motor for a washing machine among various motors, Korean Patent No. 10-1707142 suggests a BLDC motor (brushless motor) comprising: a stator core to which a front insulator and a rear insulator are coupled; a front housing and a rear housing for storing the stator core, in which legs are fixed; and a rotor which is positioned inside the stator core in the front and rear housings to rotate, having a shaft formed through the center thereof to be coupled thereto. Such motors have a circuit for controlling a rotating magnetic field by detecting a magnetic flux using a sensor magnet without a commutator. The sensor magnet is coupled to an end of the shaft of the motor.
A motor using a sensor magnet has the same features as a brush-type motor by fixing the sensor magnet to the back end of the shaft inside the rear housing using a bolt and mounting a Hall sensor for detecting the rotation of the sensor magnet on a printed circuit board in the inner surface of the rear housing in a DIM type, as disclosed in Japanese Patent Laid-Open No. 2013-7731.
The prior art may have the effect of improving the detection of rotation position of a rotor, but requires a fixing bolt for fixing a sensor magnet to a shaft and a separate fixing bolt for fixing a sensor assembly including a printed circuit board having a Hall sensor mounted thereon and a sensor cover, thereby causing an increase in the manufacturing costs due to the material costs and processing costs for assembling components, and leading to a complicate assembly process and decreasing production efficiency.
In addition, a sensor magnet and a printed circuit board having a Hall sensor corresponding thereto mounted thereon are installed in the back end of the shaft inside the rear housing. Thus, the motor has a long length and an increased weight, which makes it difficult to secure a space for installing the motor in a washing machine and install the motor.
Accordingly, in order to overcome the above problem, the present inventors suggest a motor for a washing machine having a novel structure.
It is an object of the present invention to provide a motor for a washing machine having a novel structure of assembling a printed circuit board having a SMD type Hall sensor IC mounted thereon to a front insulator, without a Hall sensor cover, thereby reducing the length and weight of a motor, and also reducing the number of components required for Hall sensing and saving the costs for manufacturing the motor.
The above and other inherent objects of the present invention may all be easily achieved by the description of the present invention described below.
A motor 100 for a washing machine according to the present invention assembles a printed circuit board 60 having a Hall sensor IC 61 mounted thereon to a front insulator 21 using a coupling member 21A extending and protruding forwardly of one side of the front insulator 21 of a stator core 20, to be positioned in a front housing 11 without disturbing the rotation of a rotor 40.
In the present invention, the Hall sensor IC 61 mounted on the printed circuit board 60 may be mounted on the printed circuit board 60 by surface mount technology using a surface mount device (SMD).
In the present invention, the coupling member 21A may comprise two outer fitting protrusions 210A, 210B integrally protruding forwardly of a back yoke insulating part 210 of the front insulator 21; and a positioning and inner fitting protrusion 212A protruding forwardly of a winding guide insulating part 212 of the front insulator 21.
In the present invention, the printed circuit board 60 coupled to the coupling member 21A may have two outer fitting holes 611, 612 corresponding to the two outer fitting protrusions 210A, 210B integrally protruding forwardly of the back yoke insulating part 210 and an inner fitting hole 613 corresponding to the positioning and inner fitting protrusion 212A protruding forwardly of the winding guide insulating part 212.
In the present invention, preferably, the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A have locking and seating stops 210A', 210B', 212A', respectively, inclined in the outside of the front thereof, protruding outwardly, and inclined surfaces 210A'', 210B'', 212A'' of the respective locking and seating stops 210A', 210B', 212A' have the lower front and higher back.
In the present invention, preferably, locking steps 210A''', 210B''', 212A''' in the back of the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A have non-slip embossing parts 210A'''', 210B'''', 212A''''.
In the present invention, a vibration absorbing pad P may be inserted into each of fitting recesses 210A-1, 210B-1, 212A-1 formed in both outer ends of the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A, respectively, of the coupling member 21A.
The present invention assembles a printed circuit board having a SMD type Hall sensor IC mounted thereon to a front insulator, capable of shortening an assembly process and improving the productivity of a motor, and reducing the number of components such as a separate Hall sensor cover, a printed circuit board stored in the Hall sensor cover, a sensor magnet, a fixing bolt for fixing these components, etc., thereby saving the material costs and also significantly reducing the weight of a motor, resulting in lower costs for manufacturing a motor.
Also, the present invention uses a printed circuit board having a SMD type Hall sensor IC mounted thereon, thereby reducing the processing costs to be incurred to assemble the Hall sensor IC.
Also, the present invention allows the printed circuit board having a Hall sensor IC mounted thereon to be positioned in the front housing without disturbing the rotation of a rotor, thereby making a compact motor, and thus minimizing a space for installing the motor.
Fig. 1 is a front perspective view of a motor for a washing machine according to the present invention;
Fig. 2 is an exploded perspective view of a motor for a washing machine according to the present invention;
Fig. 3 is an overall cross-sectional view of a motor for a washing machine according to the present invention;
Fig. 4 is an exploded perspective view of a main part of a motor for a washing machine according to the present invention;
Fig. 5 is a side view of the internal state of a motor for a washing machine according to the present invention; and
Fig. 6 is a view for explaining another embodiment of a coupling member 21A according to the present invention; Fig. 6(a) is a perspective view of a printed circuit board; Fig. 6(b) is a cross-sectional view taken along line A-A of Fig. 6(a); and Fig. 6(c) is a cross-sectional view taken along line B-B of Fig. 6(b); and
Fig. 7 is a view for explaining another embodiment of a coupling member 21A according to the present invention; Fig. 7(a) is an exploded perspective view of the coupling member; and Fig. 7(b) is a cross-sectional view of Fig. 7(a).
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is a front perspective view of a motor 100 for a washing machine according to the present invention; Fig. 2 is an exploded perspective view of the motor 100 for a washing machine according to the present invention; Fig. 3 is an overall cross-sectional view of the motor 100 for a washing machine according to the present invention; and Fig. 4 is an exploded perspective view of a main part of the motor 100 for a washing machine according to the present invention.
The motor 100 according to the present invention comprises a stator core 20 interposed and assembled between a front housing 11 and a rear housing 12 formed by aluminum die casting, a front insulator 21 and a rear insulator 22 being coupled to the front and back thereof; and a rotor 40 positioned inside the stator core 20 to rotate, having a shaft 30 formed through the center thereof to be coupled thereto.
The stator core 20 includes back yokes 20A and teeth 20B. The front insulator 21 and the rear insulator 22 include back yoke insulating parts 210, 220, winding guide insulating parts 212, 222, and tooth insulating parts 211, 221.
A drive pulley 31 coupled to the front of the shaft 30 rotates together with the shaft 30 to drive a drum (not shown) of a washing machine or a drying machine through a belt (not shown). Reference numeral 20-1 in the drawings refers to a coil winding part; 32 and 33 refer to a front bearing and a rear bearing, respectively; and 50 refers to a power connection part. Front and rear fixing brackets 11-1, 12-1 are formed in the front housing 11 and rear housing 12, respectively, to support the motor 100 on the bottom surface.
Hereinafter, the present invention mainly describes "a motor for a washing machine", but is not necessarily limited to a motor for a washing machine. The present invention may also apply to a drying machine for laundry or a motor for other use.
The present invention may assemble a printed circuit board 60 having a SMD type Hall sensor IC 61 mounted thereon to the front insulator 21 of the stator core 20 without disturbing the rotation of the rotor 40, to detect the rotation position of the rotor 40.
A terminal of the Hall sensor IC 61 mounted on the printed circuit board 60 is connected to a coil of the coil winding part 20-1 to determine the current direction of the stator winding. Accordingly, a BLDC motor for a washing machine having the features of a brush type motor can be provided.
The present invention having the above configuration assembles the printed circuit board 60 having the Hall sensor IC 61 mounted thereon to the front insulator 21 using a coupling member 21A protruding forwardly of one side of the front insulator 21, to be positioned inside the front housing 11 without disturbing the rotation of the rotor 40, as shown in the side view of Fig. 5.
Preferably, the Hall sensor IC 61 is mounted on the printed circuit board 60 by surface mount technology using a SMD.
The coupling member 21A comprises two outer fitting protrusions 210A, 210B integrally protruding forwardly of the back yoke insulating part 210 of the front insulator 21; and a positioning and inner fitting protrusion 212A protruding forwardly of the winding guide insulating part 212 of the front insulator 21, wherein preferably, the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A are positioned at the three vertices of a triangle shape with the center of the positioning and inner fitting protrusion 212A.
Accordingly, the present invention may minimize a space for installing the printed circuit board 60 by forming the coupling member 21A at one side of the outer circumference of the back yoke insulating part 210 and one side of the inner circumference of the winding guide insulating part 212 of the front insulator 21, not in the overall outer circumference of the back yoke insulating part 210 and the overall inner circumference of the winding guide insulating part 212 of the front insulator 21.
The printed circuit board 60 coupled to the coupling member 21A has two outer fitting holes 611, 612 corresponding to the two outer fitting protrusions 210A, 210B integrally protruding forwardly of the back yoke insulating part 210 and an inner fitting hole 613 corresponding to the positioning and inner fitting protrusion 212A protruding forwardly of the winding guide insulating part 212. The outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A are fitted into the two outer fitting holes 611, 612 and the inner fitting hole 613 to be assembled. The inner circumference of the printed circuit board 60 is installed within a range not deviating from the winding guide insulating part 212, such that the printed circuit board 60 is installed without disturbing the rotation of the rotor 40.
The positioning and inner fitting protrusion 212A is positioned at the inner vertex between the outer fitting protrusion 210A and the outer fitting protrusion 210B. When the positioning and inner fitting protrusion 212A is fitted into the inner fitting hole 613, the outer fitting protrusion 210A and the outer fitting protrusion 210B are easily fitted into the outer fitting holes 611, 612, such that the printed circuit board 60 is positioned, thereby allowing for quick assembling.
The outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A have locking and seating stops 210A', 210B', 212A', respectively, inclined in the outside of the front thereof, protruding outwardly. When these protrusions are fitted into the outer fitting holes 611, 612 and the inner fitting hole 613, inclined surfaces 210A'', 210B'', 212A'' of the respective locking and seating stops 210A', 210B', 212A' are smoothly fitted along the outer fitting holes 611, 612 and the inner fitting hole 613, such that the locking and seating stops 210A', 210B', 212A' are locked to the surface of the printed circuit board 60, thereby enabling stable and firm assembling and preventing separation.
Preferably, the inclined surfaces 210A'', 210B'', 212A'' of the respective locking and seating stops 210A', 210B', 212A' have the lower front and higher back.
For stable assembling when the locking and seating stops 210A', 210B', 212A' are fitted along the outer fitting holes 611, 612 and the inner fitting hole 613, the locking and seating stops 210A', 210B', 212A' may be configured to have elasticity or the locking and seating stops 210A', 210B', 212A' may be made of a synthetic resin having elasticity.
Fig. 6 is a view for explaining another embodiment of a coupling member 21A according to the present invention; Fig. 6(a) is a perspective view of a printed circuit board; Fig. 6(b) is a cross-sectional view taken along line A-A of Fig. 6(a); and Fig. 6(c) is a cross-sectional view taken along line B-B of Fig. 6(b).
Locking steps 210A''', 210B''', 212A''' in the back of the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A have non-slip embossing parts 210A'''', 210B'''', 212A'''', respectively, such that the rear surface of the printed circuit board 60 is in contact with the non-slip embossing parts 210A'''', 210B'''', 212A'''', after assembling the printed circuit board 60. Accordingly, the vibration that may occur while the printed circuit board 60 shakes due to vibration occurring when the motor 100 is driven is absorbed and the noise is prevented. Or, the separation of the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A is prevented, which is caused by the shaking of the printed circuit board 60 due to vibration occurring when the motor 100 is driven.
Fig. 7 is a view for explaining another embodiment of a coupling member 21A according to the present invention; Fig. 7(a) is an exploded perspective view of the coupling member; and Fig. 7(b) is a cross-sectional view of Fig. 7(a).
A vibration absorbing pad P is inserted into each of fitting recesses 210A-1, 210B-1, 212A-1 formed in both outer ends of the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A, respectively, of the coupling member 21A. When the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A are fitted into the outer fitting holes 611, 612 and the inner fitting hole 613, the outer circumferential surface of the vibration absorbing pad P is in contact with the inner surface of the outer fitting holes 611, 612 and the inner fitting hole 613. Thereby, the vibration absorbing pad P absorbs vibration that may occur while the printed circuit board 60 shakes due to vibration occurring when the motor 100 is driven, thereby preventing noise.
It should be noted that the description of the present invention described above is merely an example for understanding the present invention, and is not intended to limit the scope of the present invention. The scope of protection of the present invention is defined by the accompanying claims, and it should be construed that simple modifications or alternations within the scope of the claims fall within the scope of the present invention.

Claims (7)

  1. A motor for a washing machine, assembling a printed circuit board 60 having a Hall sensor IC 61 mounted thereon to a front insulator 21 using a coupling member 21A extending and protruding forwardly of one side of the front insulator 21 of a stator core 20, to be positioned in a front housing 11.
  2. The motor of claim 1, wherein the Hall sensor IC 61 mounted on the printed circuit board 60 is mounted on the printed circuit board 60 by surface mount technology using a surface mount device (SMD).
  3. The motor of claim 1, wherein the coupling member 21A comprises two outer fitting protrusions 210A, 210B integrally protruding forwardly of a back yoke insulating part 210 of the front insulator 21; and a positioning and inner fitting protrusion 212A protruding forwardly of a winding guide insulating part 212 of the front insulator 21.
  4. The motor of claim 1, wherein the printed circuit board 60 coupled to the coupling member 21A has two outer fitting holes 611, 612 corresponding to the two outer fitting protrusions 210A, 210B integrally protruding forwardly of the back yoke insulating part 210 and an inner fitting hole 613 corresponding to the positioning and inner fitting protrusion 212A protruding forwardly of the winding guide insulating part 212.
  5. The motor of claim 4, wherein the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A have locking and seating stops 210A', 210B', 212A', respectively, inclined in the outside of the front thereof, protruding outwardly, and inclined surfaces 210A'', 210B'', 212A'' of the respective locking and seating stops 210A', 210B', 212A' have the lower front and higher back.
  6. The motor of claim 4, wherein locking steps 210A''', 210B''', 212A''' in the back of the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A have non-slip embossing parts 210A'''', 210B'''', 212A''''.
  7. The motor of claim 1, wherein a vibration absorbing pad P is inserted into each of fitting recesses 210A-1, 210B-1, 212A-1 formed in both outer ends of the outer fitting protrusions 210A, 210B and the positioning and inner fitting protrusion 212A, respectively, of the coupling member 21A.
PCT/KR2023/011074 2022-09-23 2023-07-28 Motor for washing machine WO2024063311A1 (en)

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Application Number Priority Date Filing Date Title
KR1020220121062A KR20240041692A (en) 2022-09-23 2022-09-23 Motor for washing machine
KR10-2022-0121062 2022-09-23

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060232147A1 (en) * 2003-10-07 2006-10-19 Wei Cheng Belt drive system with outer rotor motor
US20070205682A1 (en) * 2005-01-17 2007-09-06 Lg Electronics, Inc Dual Rotor Type Motor
KR20080081412A (en) * 2007-03-05 2008-09-10 주식회사 대우일렉트로닉스 Brushless dc motor
US20130234546A1 (en) * 2010-11-09 2013-09-12 Amotech Co., Ltd. Double-rotor motor
US10075048B2 (en) * 2013-08-08 2018-09-11 Samsung Electronics Co., Ltd. Motor and washing machine having the same
US20210159764A1 (en) * 2018-04-16 2021-05-27 Mitsubishi Electric Corporation Encoder and motor

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060232147A1 (en) * 2003-10-07 2006-10-19 Wei Cheng Belt drive system with outer rotor motor
US20070205682A1 (en) * 2005-01-17 2007-09-06 Lg Electronics, Inc Dual Rotor Type Motor
KR20080081412A (en) * 2007-03-05 2008-09-10 주식회사 대우일렉트로닉스 Brushless dc motor
US20130234546A1 (en) * 2010-11-09 2013-09-12 Amotech Co., Ltd. Double-rotor motor
US10075048B2 (en) * 2013-08-08 2018-09-11 Samsung Electronics Co., Ltd. Motor and washing machine having the same
US20210159764A1 (en) * 2018-04-16 2021-05-27 Mitsubishi Electric Corporation Encoder and motor

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