WO2024063312A1 - Motor for washing machine - Google Patents

Motor for washing machine Download PDF

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Publication number
WO2024063312A1
WO2024063312A1 PCT/KR2023/011077 KR2023011077W WO2024063312A1 WO 2024063312 A1 WO2024063312 A1 WO 2024063312A1 KR 2023011077 W KR2023011077 W KR 2023011077W WO 2024063312 A1 WO2024063312 A1 WO 2024063312A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit board
printed circuit
motor
coupling
storing case
Prior art date
Application number
PCT/KR2023/011077
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
Priority claimed from KR1020220121063A external-priority patent/KR102718357B1/en
Application filed by New Motech Co., Ltd. filed Critical New Motech Co., Ltd.
Publication of WO2024063312A1 publication Critical patent/WO2024063312A1/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12—Stationary parts of the magnetic circuit
    • H02K1/18—Means for mounting or fastening magnetic stationary parts on to, or to, the stator structures
    • 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
    • D06F37/206—Mounting of motor
    • 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
    • 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
    • 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
    • D06F37/30—Driving arrangements 
    • D06F37/304—Arrangements or adaptations of electric motors
    • 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 for a washing machine. 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 to one side of a front housing, 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.
  • 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 stores a printed circuit board 60 having a Hall sensor IC 61 mounted thereon in a coupling means 120 formed in one side in a front housing 11 of the motor 100 to be positioned in the front housing 11.
  • 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 means 120 may comprise first and second guide pieces 121, 122 formed in the inner surface of a weight loss space 110, protruding towards one side of a front insulator 21 in the left and right directions at a predetermined interval; a weight loss space inner bottom surface 123 formed between the first guide piece 121 and the second guide piece 122; a printed circuit board storing case 124 seated by being coupled to the weight loss space inner bottom surface 123 by a coupling bolt B; and a fitting protrusion 124A for coupling a printed circuit board, protruding inside the printed circuit board storing case 124.
  • first guide piece 121 and the second guide piece 122 may have fitting guide recesses 121A, 122A, respectively, curved outwardly of the center.
  • the printed circuit board storing case 124 comprises a printed circuit board storing space 124-1 formed in the center of the main body; a support protrusion 124-2 arranged in the printed circuit board storing space 124-1 at a predetermined interval; a fitting protrusion 124A for coupling a printed circuit board, protruding inside the printed circuit board storing case 124; and first and second curved parts 125, 126 having coupling holes 125', 126', protruding outwardly of the left and right ends of the main body.
  • a locking stop 124A' formed in the fitting protrusion 124A for coupling a printed circuit board protruding inside the printed circuit board storing case 124 is fitted into a fitting hole 62 in the printed circuit board 60, such that the printed circuit board 60 having the Hall sensor IC 61 mounted thereon is assembled to the printed circuit board storing case 124.
  • a positioning recess 127 curved upwardly may be formed in the lower part of the printed circuit board storing case 124, and a corresponding positioning recess 63 curved upwardly may be formed in the lower part of the printed circuit board 60 corresponding thereto, to be assembled.
  • the present invention assembles a printed circuit board having a SMD type Hall sensor IC mounted thereon to one side in a front insulator, capable of providing convenience in assembling, 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 exploded rear perspective view of a front housing of a motor for a washing machine according to the present invention
  • Fig. 4 is an overall cross-sectional view of a motor for a washing machine according to the present invention.
  • Fig. 5 is a cross-sectional view of a printed circuit board assembled to a front housing of a motor for a washing machine according to the present invention, taken along a coupling bolt as the center;
  • Fig. 6 is a perspective view of another example of the assembling of a printed circuit board and a printed circuit board storing case assembled to a front housing of a motor for a washing machine according to the present invention.
  • 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 exploded rear perspective view of a front housing 11 of the motor for a washing machine according to the present invention
  • Fig. 4 is an overall cross-sectional view of the motor 100 for a washing machine according to the present invention
  • Fig. 5 is a cross-sectional view of a printed circuit board 60 assembled to the front housing 11 of the motor 100 for a washing machine according to the present invention, taken along a coupling bolt B as the center.
  • 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, an insulator 21 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.
  • a coil of a coil winding part is wound around teeth of the stator core 20, and the front and rear of the coil winding part are insulated by the insulator 21.
  • 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 numerals 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 store a printed circuit board 60 having a Hall sensor IC 61 mounted thereon in a coupling means 120 formed in one side in a front housing 11 of the motor 100 to be positioned in the front housing 11 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 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 forms a weight loss space 110 recessed into one side of the front housing 11.
  • the coupling means 120 for mounting the printed circuit board is coupled to a coupling hole 111 formed through the bottom surface of the weight loss space 110 by a coupling bolt B.
  • the coupling means 120 may be provided in the inner surface of the weight loss space 110.
  • the coupling means 120 may comprise first and second guide pieces 121, 122 formed in the inner surface of the weight loss space 110, protruding towards one side of the front insulator 21 in the left and right directions at a predetermined interval; a weight loss space inner bottom surface 123 formed between the first guide piece 121 and the second guide piece 122; a printed circuit board storing case 124 seated by being coupled to the weight loss space inner bottom surface 123 by a coupling bolt B; and a fitting protrusion 124A for coupling a printed circuit board, protruding inside the printed circuit board storing case 124.
  • the first guide piece 121 and the second guide piece 122 may have fitting guide recesses 121A, 122A, respectively, curved outwardly of the center.
  • the printed circuit board storing case 124 may comprise a printed circuit board storing space 124-1 formed in the center of the main body; a support protrusion 124-2 arranged in the printed circuit board storing space 124-1 at a predetermined interval; a fitting protrusion 124A for coupling a printed circuit board, protruding inside the printed circuit board storing case 124; and first and second curved parts 125, 126 having coupling holes 125', 126', protruding outwardly of the left and right ends of the main body.
  • the first and second curved parts 125, 126 of the printed circuit board storing case 124 are fitted into the fitting guide recesses 121A, 122A curved outwardly of the center of the first guide piece 121 and second guide piece 122, respectively, the first and second curved parts 125, 126 match the fitting guide recesses 121A, 122A without dislocation, thereby providing convenience in coupling.
  • the coupling holes 125', 126' of the first and second curved parts 125, 126 match the coupling holes 111 formed through the bottom surface of the weight loss space 110 of the front housing 11, capable of easily coupling the printed circuit board storing case 124 to the coupling means 120 for mounting a printed circuit board by a coupling bolt B, and thereby shortening an assembly process.
  • the fitting protrusion 124A for coupling a printed circuit board, protruding inside the printed circuit board storing case 124 is a locking member having a locking stop 124A', to be fitted into a fitting hole 62 in the printed circuit board 60, such that the printed circuit board 60 having the Hall sensor IC 61 mounted thereon is assembled to the printed circuit board storing case 124, allowing firm coupling.
  • Fig. 6 is a perspective view of another example of the assembling of a printed circuit board and a printed circuit board storing case 124 assembled to a front housing of a motor for a washing machine according to the present invention.
  • a positioning recess 127 curved upwardly is formed in the lower part of the printed circuit board storing case 124, and a corresponding positioning recess 63 curved upwardly is formed in the lower part of the printed circuit board 60 corresponding thereto, such that the corresponding positioning recess 63 of the printed circuit board 60 is in surface-contact with the positioning recess 127 of the printed circuit board storing case 124.
  • the fitting hole 62 of the printed circuit board 60 matches the fitting protrusion 124A for coupling a printed circuit board of the printed circuit board storing case 124, capable of shortening an assembly process.
  • the present invention assembles the printed circuit board 60 having the Hall sensor IC 61 mounted thereon by the coupling means 120 formed in the inner surface of the weight loss space 110 of the front housing 11, such that the printed circuit board 60 having the Hall sensor IC 61 mounted thereon is arranged in a minimal space of one side in the front housing 11, capable of reducing the total weight of the motor and minimizing the size of the motor, and also allowing safe installation without disturbing the rotation of the rotor 40.
  • the printed circuit board 60 is arranged close to the winding part of the stator core 20, thereby providing convenience in circuit wire connection between the stator winding part and the printed circuit board 60.

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

Abstract

A motor 100 for a washing machine according to the present invention stores a printed circuit board 60 having a Hall sensor IC 61 mounted thereon in a coupling means 120 formed in one side in a front housing 11 of the motor 100 to be positioned in the front housing 11.

Description

MOTOR FOR WASHING MACHINE
The present invention relates to a motor for a washing machine. 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 to one side of a front housing, 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 one side in a front insulator, 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 stores a printed circuit board 60 having a Hall sensor IC 61 mounted thereon in a coupling means 120 formed in one side in a front housing 11 of the motor 100 to be positioned in the front housing 11.
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 means 120 may comprise first and second guide pieces 121, 122 formed in the inner surface of a weight loss space 110, protruding towards one side of a front insulator 21 in the left and right directions at a predetermined interval; a weight loss space inner bottom surface 123 formed between the first guide piece 121 and the second guide piece 122; a printed circuit board storing case 124 seated by being coupled to the weight loss space inner bottom surface 123 by a coupling bolt B; and a fitting protrusion 124A for coupling a printed circuit board, protruding inside the printed circuit board storing case 124.
In the present invention, the first guide piece 121 and the second guide piece 122 may have fitting guide recesses 121A, 122A, respectively, curved outwardly of the center.
In the present invention, preferably, the printed circuit board storing case 124 comprises a printed circuit board storing space 124-1 formed in the center of the main body; a support protrusion 124-2 arranged in the printed circuit board storing space 124-1 at a predetermined interval; a fitting protrusion 124A for coupling a printed circuit board, protruding inside the printed circuit board storing case 124; and first and second curved parts 125, 126 having coupling holes 125', 126', protruding outwardly of the left and right ends of the main body.
In the present invention, preferably, a locking stop 124A' formed in the fitting protrusion 124A for coupling a printed circuit board protruding inside the printed circuit board storing case 124 is fitted into a fitting hole 62 in the printed circuit board 60, such that the printed circuit board 60 having the Hall sensor IC 61 mounted thereon is assembled to the printed circuit board storing case 124.
In the present invention, a positioning recess 127 curved upwardly may be formed in the lower part of the printed circuit board storing case 124, and a corresponding positioning recess 63 curved upwardly may be formed in the lower part of the printed circuit board 60 corresponding thereto, to be assembled.
The present invention assembles a printed circuit board having a SMD type Hall sensor IC mounted thereon to one side in a front insulator, capable of providing convenience in assembling, 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 exploded rear perspective view of a front housing of a motor for a washing machine according to the present invention;
Fig. 4 is an overall cross-sectional view of a motor for a washing machine according to the present invention;
Fig. 5 is a cross-sectional view of a printed circuit board assembled to a front housing of a motor for a washing machine according to the present invention, taken along a coupling bolt as the center; and
Fig. 6 is a perspective view of another example of the assembling of a printed circuit board and a printed circuit board storing case assembled to a front housing of a motor for a washing machine according to the present invention.
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 exploded rear perspective view of a front housing 11 of the motor for a washing machine according to the present invention; Fig. 4 is an overall cross-sectional view of the motor 100 for a washing machine according to the present invention; and Fig. 5 is a cross-sectional view of a printed circuit board 60 assembled to the front housing 11 of the motor 100 for a washing machine according to the present invention, taken along a coupling bolt B as the center.
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, an insulator 21 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.
A coil of a coil winding part is wound around teeth of the stator core 20, and the front and rear of the coil winding part are insulated by the insulator 21.
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 numerals 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 store a printed circuit board 60 having a Hall sensor IC 61 mounted thereon in a coupling means 120 formed in one side in a front housing 11 of the motor 100 to be positioned in the front housing 11 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 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 forms a weight loss space 110 recessed into one side of the front housing 11. The coupling means 120 for mounting the printed circuit board is coupled to a coupling hole 111 formed through the bottom surface of the weight loss space 110 by a coupling bolt B. The coupling means 120 may be provided in the inner surface of the weight loss space 110.
The coupling means 120 may comprise first and second guide pieces 121, 122 formed in the inner surface of the weight loss space 110, protruding towards one side of the front insulator 21 in the left and right directions at a predetermined interval; a weight loss space inner bottom surface 123 formed between the first guide piece 121 and the second guide piece 122; a printed circuit board storing case 124 seated by being coupled to the weight loss space inner bottom surface 123 by a coupling bolt B; and a fitting protrusion 124A for coupling a printed circuit board, protruding inside the printed circuit board storing case 124.
The first guide piece 121 and the second guide piece 122 may have fitting guide recesses 121A, 122A, respectively, curved outwardly of the center.
The printed circuit board storing case 124 may comprise a printed circuit board storing space 124-1 formed in the center of the main body; a support protrusion 124-2 arranged in the printed circuit board storing space 124-1 at a predetermined interval; a fitting protrusion 124A for coupling a printed circuit board, protruding inside the printed circuit board storing case 124; and first and second curved parts 125, 126 having coupling holes 125', 126', protruding outwardly of the left and right ends of the main body.
Accordingly, when the first and second curved parts 125, 126 of the printed circuit board storing case 124 are fitted into the fitting guide recesses 121A, 122A curved outwardly of the center of the first guide piece 121 and second guide piece 122, respectively, the first and second curved parts 125, 126 match the fitting guide recesses 121A, 122A without dislocation, thereby providing convenience in coupling. At the same time, the coupling holes 125', 126' of the first and second curved parts 125, 126 match the coupling holes 111 formed through the bottom surface of the weight loss space 110 of the front housing 11, capable of easily coupling the printed circuit board storing case 124 to the coupling means 120 for mounting a printed circuit board by a coupling bolt B, and thereby shortening an assembly process.
The fitting protrusion 124A for coupling a printed circuit board, protruding inside the printed circuit board storing case 124 is a locking member having a locking stop 124A', to be fitted into a fitting hole 62 in the printed circuit board 60, such that the printed circuit board 60 having the Hall sensor IC 61 mounted thereon is assembled to the printed circuit board storing case 124, allowing firm coupling.
Fig. 6 is a perspective view of another example of the assembling of a printed circuit board and a printed circuit board storing case 124 assembled to a front housing of a motor for a washing machine according to the present invention.
In the case of the positioning to match the fitting hole 62 of the printed circuit board 60 to the fitting protrusion 124A for coupling a printed circuit board of the printed circuit board storing case 124, a positioning recess 127 curved upwardly is formed in the lower part of the printed circuit board storing case 124, and a corresponding positioning recess 63 curved upwardly is formed in the lower part of the printed circuit board 60 corresponding thereto, such that the corresponding positioning recess 63 of the printed circuit board 60 is in surface-contact with the positioning recess 127 of the printed circuit board storing case 124. Thereby, the fitting hole 62 of the printed circuit board 60 matches the fitting protrusion 124A for coupling a printed circuit board of the printed circuit board storing case 124, capable of shortening an assembly process.
The present invention assembles the printed circuit board 60 having the Hall sensor IC 61 mounted thereon by the coupling means 120 formed in the inner surface of the weight loss space 110 of the front housing 11, such that the printed circuit board 60 having the Hall sensor IC 61 mounted thereon is arranged in a minimal space of one side in the front housing 11, capable of reducing the total weight of the motor and minimizing the size of the motor, and also allowing safe installation without disturbing the rotation of the rotor 40. In addition, the printed circuit board 60 is arranged close to the winding part of the stator core 20, thereby providing convenience in circuit wire connection between the stator winding part and the printed circuit board 60.
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, storing a printed circuit board 60 having a Hall sensor IC 61 mounted thereon in a coupling means 120 formed in one side in a front housing 11 of the motor 100 to be positioned in the 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 means 120 comprises first and second guide pieces 121, 122 formed in the inner surface of a weight loss space 110, protruding towards one side of a front insulator 21 in the left and right directions at a predetermined interval; a weight loss space inner bottom surface 123 formed between the first guide piece 121 and the second guide piece 122; a printed circuit board storing case 124 seated by being coupled to the weight loss space inner bottom surface 123 by a coupling bolt B; and a fitting protrusion 124A for coupling a printed circuit board, protruding inside the printed circuit board storing case 124.
  4. The motor of claim 3, wherein the first guide piece 121 and the second guide piece 122 have fitting guide recesses 121A, 122A, respectively, curved outwardly of the center.
  5. The motor of claim 3, wherein the printed circuit board storing case 124 comprises a printed circuit board storing space 124-1 formed in the center of the main body; a support protrusion 124-2 arranged in the printed circuit board storing space 124-1 at a predetermined interval; a fitting protrusion 124A for coupling a printed circuit board, protruding inside the printed circuit board storing case 124; and first and second curved parts 125, 126 having coupling holes 125', 126', protruding outwardly of the left and right ends of the main body.
  6. The motor of claim 4, wherein a locking stop 124A' formed in the fitting protrusion 124A for coupling a printed circuit board protruding inside the printed circuit board storing case 124 is fitted into a fitting hole 62 in the printed circuit board 60, such that the printed circuit board 60 having the Hall sensor IC 61 mounted thereon is assembled to the printed circuit board storing case 124.
  7. The motor of claim 4, wherein a positioning recess 127 curved upwardly is formed in the lower part of the printed circuit board storing case 124, and a corresponding positioning recess 63 curved upwardly is formed in the lower part of the printed circuit board 60 corresponding thereto, to be assembled.
PCT/KR2023/011077 2022-09-23 2023-07-28 Motor for washing machine WO2024063312A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1020220121063A KR102718357B1 (en) 2022-09-23 Motor for washing machine
KR10-2022-0121063 2022-09-23

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WO2024063312A1 true WO2024063312A1 (en) 2024-03-28

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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US20190044415A1 (en) * 2010-06-14 2019-02-07 Black & Decker Inc. Brushless motor for a power tool
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US20150022063A1 (en) * 2013-07-17 2015-01-22 Zhongshan Broad-Ocean Motor Co., Ltd. Induced draft fan
US20200321834A1 (en) * 2017-12-06 2020-10-08 New Motech Co., Ltd. Switched reluctance motor

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