KR102641937B1 - Motor for laundry apparatus - Google Patents

Abstract

An embodiment of the present invention relates to a motor for clothing equipment, which includes a core, a stator including a coil, a magnet disposed outside the stator, a rotor including a rotor frame rotating outside the stator, and a rotating force in the rotor frame. It includes a drive shaft that receives and rotates, and the rotor frame includes a circular base frame with a circular opening formed at the rotation center, a rotor bushing located in the circular opening and to which the drive shaft is fastened, and a gap formed between the base frame and the rotor bushing. Includes an intake port located at. According to the present invention, the heat dissipation performance of the motor can be improved while preventing a decrease in the rigidity of the motor.

Description

Motor for clothing equipment{MOTOR FOR LAUNDRY APPARATUS}

Embodiments of the present invention relate to a motor for clothing devices, and more specifically, to a motor for clothing devices that can prevent a decrease in the rigidity of the motor and improve the heat dissipation performance of the motor by using the gap between the rotor frame and the rotor bushing as an intake port. It's about the motor.

The content described below is merely for the purpose of providing background information related to embodiments of the present invention, and the content described does not necessarily constitute prior art.

Clothing equipment is a concept that includes clothing, specifically, clothing processing devices such as washing machines that wash laundry and dryers that dry wet clothing after washing.

A washing machine includes a water tank that accommodates washing water, a rotating tank that rotates inside the water tank, a pulsator that rotates inside the rotating tank, and a motor that provides rotational force to the rotating tank and the pulsator.

When laundry is put into the rotary tub, the laundry stored inside the rotary tub is agitated with washing water by the rotation of the pulsator and the rotary tub, which are rotated by a motor. As a result, contaminants in the laundry are removed.

The motor of the washing machine is connected to the pulsator and transmits rotational force to the pulsator to rotate it. Additionally, the motor of the washing machine selectively transmits rotational force to the rotary tub through a clutch operation and rotates the rotary tub. In this way, the washing machine can implement the washing mode and spin-drying mode operations by selectively using the rotating operation of the pulsator and the rotating operation of the rotary tub.

Additionally, an outer rotor type motor can be used in clothing appliances such as washing machines.

An abduction motor refers to a motor that has an outer rotor. In other words, an abduction motor is a type of motor in which the rotor rotates outside the stator, and the inertia of the rotor is large, making it advantageous for constant speed rotation and also suitable for high-speed operation.

Additionally, an abduction motor can have a large rotor magnet. Because of this, it has the advantage of being able to exert a large torque.

For example, the shaft that drives the washing machine, that is, the washing shaft, is connected to the rotor, and the washing shaft rotates by directly receiving the rotational force of the rotor.

Recently, with the trend toward larger capacity of home appliances, the need for higher efficiency of motors used in clothing appliances such as washing machines is increasing. Accordingly, the rotor frame comprised in the motor must secure the rigidity of the motor and have a heat dissipation function for the motor.

However, in order to secure the rigidity of the motor, a design to reinforce the shape of the rotor frame is required, but in order to have a heat dissipation function, it is necessary to partially remove the shape of the rotor frame to form an intake port such as a hole.

However, in order to secure the heat dissipation performance of the motor, if the rotor frame is partially removed, there is a high possibility that its rigidity will deteriorate.

Therefore, it is required to design a heat dissipation structure for a motor that can have a heat dissipation function without deteriorating rigidity by taking maximum consideration of securing the rigidity of the motor.

As a prior document related to the present invention, Republic of Korea Patent Publication No. 10-2004-0075253 (hereinafter referred to as prior document 1) discloses a motor and a washing machine installed with the motor.

The motor disclosed in Prior Document 1 has a cooling hole formed on the bottom surface of the rotor cup (i.e., rotor frame), and the lower blade protrudes at a predetermined height from the bottom surface of the rotor cup (i.e., rotor frame) at a position adjacent to the cooling hole. It is provided in shape. In addition, a vent is additionally formed on the side of the rotor cup (i.e., frame), so that the air inside the rotor cup (i.e., rotor frame) is ventilated to the outside.

However, the motor disclosed in Prior Literature 1 has a structure in which a plurality of holes (i.e., cooling holes and vents) are formed on the lower and side surfaces of the rotor cup (i.e., rotor frame), and there is a problem in that the rigidity of the motor is reduced.

In addition, the motor disclosed in Prior Literature 1 has a plurality of blades with a predetermined height protruding from the lower surface of the rotor cup (i.e., rotor frame) disposed facing the coil. In this case, since the blade faces the lower part of the coil, there is a disadvantage in that the coil winding space is reduced due to the protruding height of the blade, and in order to improve the output and efficiency of the motor, the size of the motor must be increased.

As another prior document related to the present invention, US10697101 (hereinafter referred to as prior document 2) discloses a motor for a washing machine.

The motor disclosed in Prior Document 2 includes a first ring portion and a second ring portion at the base of the rotor casing (i.e., rotor frame). The first ring part is a part that faces the stator coil part, and the second ring part is a part that is located close to the center of the rotor casing (i.e., rotor frame) and does not face the stator coil part. And a plurality of air inlet holes are formed in the second ring portion.

However, even in the case of the motor disclosed in Prior Document 2, a plurality of holes (i.e., air inlet holes) are formed in the lower part of the rotor casing (i.e., rotor frame).

The lower part of the rotor casing in Prior Literature 2 has a disk shape. If a plurality of holes (i.e., air inlet holes) are formed in this area, the rigidity of the rotor casing decreases, causing deformation of the rotor casing when the rotor rotates at high speed. It can be triggered. As a result, there is a problem in that the rigidity of the motor deteriorates.

As another prior document related to the present invention, Republic of Korea Patent Publication No. 10-2006-0031275 (hereinafter referred to as prior document 3) discloses a rotor structure of a motor for a drum washing machine.

In the rotor structure of the motor disclosed in Prior Literature 3, long holes are formed radially on the bottom of the rotor, and blades are provided in the long holes.

In the case of the motor disclosed in prior document 3, however, the motor disclosed in prior document 1 has a structure in which a plurality of long holes are formed on the bottom of the rotor, and, like the prior documents 1 and 2 discussed above, the problem is that the rigidity of the rotor frame is reduced. There is.

In addition, since the blade has a structure in which the blade protrudes at a predetermined height in the area facing the lower part of the coil, there is a problem that the space for winding the coil is insufficient due to the protrusion of the blade. For this reason, there is a disadvantage that the size of the motor must be increased in order to improve the output and efficiency of the motor.

Therefore, it is necessary to develop a technology that can improve the heat dissipation performance of the motor without reducing the rigidity of the motor, and that can improve the output and efficiency of the motor without increasing the size of the motor by ensuring sufficient coil winding space. .

Republic of Korea Patent Publication No. 10-2004-0075253 US10697101B2 Republic of Korea Patent Publication No. 10-2006-0031275

The object of the present invention is to provide a clothing device that can be provided with an intake port for heat dissipation without changing the shape or removing part of the rotor frame, which has a significant influence on maintaining the rigidity of the motor, in an external rotor motor having an outer rotor. Provides a motor.

The purpose of the present invention is to provide an intake port in the gap between the rotor frame and the rotor bushing without reducing the rigidity of the motor by machining a hole in the lower part (i.e., base frame) or side (i.e., extension frame) of the rotor frame. Provides a motor for clothing devices that can be formed to improve the heat dissipation performance of the motor.

The purpose of the present invention is to provide clothing that secures the rigidity of the motor and is easy to manufacture by forming various intake passages for intake of external air in the rotor bushing, which is an injection part whose shape is easier to implement than a rotor frame made of steel. Provides motors for devices.

The purpose of the present invention is to easily change the structure of the intake passage located inside the rotor bushing to allow the intake air to flow upward toward the coil, thereby increasing the cooling effect of the coil and improving the heat dissipation performance of the motor. Provides a motor.

The purpose of the present invention is to provide a clothing device that can secure sufficient coil winding space by not providing a protruding structure such as a blade in the rotor frame, thereby improving the output and efficiency of the motor without increasing the size of the motor. It provides a motor.

The objects of the present invention are not limited to the objects mentioned above, and other objects and advantages of the present invention that are not mentioned can be understood by the following description and will be more clearly understood by the examples of the present invention. Additionally, it will be readily apparent that the objects and advantages of the present invention can be realized by the means and combinations thereof indicated in the patent claims.

According to an embodiment of the present invention, in an abduction motor in which the rotor rotates outside the stator, a motor for clothing equipment that has an intake port without changing the shape or removing part of the rotor frame, which has a significant influence on maintaining the rigidity of the motor. can be provided.

In addition, according to an embodiment of the present invention, the intake port is not formed by machining a hole in the lower part (i.e., base frame) or side (i.e., extension frame) of the rotor frame, and the intake port is formed in the gap between the rotor frame and the rotor bushing. A motor for a clothing device can be provided.

In addition, according to an embodiment of the present invention, various intake passages can be formed in the rotor bushing, which is an injection part whose shape is easier to implement than a rotor frame made of steel, thereby securing the rigidity of the motor and creating a motor for clothing devices that is easy to manufacture. can be provided.

In addition, according to an embodiment of the present invention, the structure of the intake passage located inside the rotor bushing can be changed into various forms, and in particular, the flow direction of the air passing through the intake passage can be increased toward the coil, thereby increasing the cooling effect of the coil. We can provide motors for clothing devices that can be used.

In addition, according to an embodiment of the present invention, a motor for clothing devices is provided that does not form protruding structures such as blades on the rotor frame, thereby securing sufficient space for coil winding.

A motor for a clothing device according to an embodiment of the present invention includes a stator, a rotor, and a drive shaft.

The stator includes an annular core and a coil wound around the core.

The rotor includes a magnet disposed with an air gap outside the stator, and a rotor frame that fixes the magnet and rotates outside the stator.

The drive shaft is an axis that rotates by receiving rotational force from the rotor frame.

The rotor frame includes a circular base frame, rotor bushing, and intake port.

The circular base frame is arranged to face the coil at an interval, and a circular opening may be formed at the center of rotation.

The rotor bushing is located in the circular opening and is the member to which the drive shaft is fastened.

The rotor bushing may be formed integrally with the base frame.

Rotor bushings can be made of a resin material that can be injection molded, and can be easily injection molded into various shapes.

The intake port may be located in the gap formed between the base frame and the rotor bushing.

The intake port serves as an air flow passage that intakes air outside the rotor frame into the inside of the rotor frame when the rotor frame rotates.

In the motor for clothing equipment according to an embodiment of the present invention, the rotor bushing includes a bushing body portion and a serration portion.

The bushing body part refers to an injection molded product that constitutes the overall body of the rotor bushing.

Unlike the base frame made of steel, the bushing body part can be made of an injectable resin material so that it can be easily molded into various shapes.

A gap may be formed between the bushing body and the base frame.

The serration portion is located at the center of the bushing body portion and has a serration-shaped hole for fastening the drive shaft, that is, serration fastening.

In the motor for clothing equipment according to an embodiment of the present invention, the rotor bushing includes a bushing body portion with a plurality of gaps formed between the rotor bushing and the base frame.

The plurality of gaps include first and second gaps formed at different positions.

The bushing body portion includes a first bushing body portion, a second bushing body portion, and a third bushing body portion.

The first bushing body portion may be formed at a distance equal to the first gap from one surface of the base frame.

The second bushing body portion may be parallel to the first bushing body portion and may be in close contact with the other surface of the base frame.

One end of the third bushing body may be connected to the first bushing body, and the other end may be spaced apart from the second bushing body by a second gap.

The first bushing body portion and the second bushing body portion may have a disk shape with a larger diameter than the circular opening portion. The first bushing body portion and the second bushing body portion may be disposed on one surface (i.e., upper surface) and the other surface (i.e., lower surface) of the base frame based on the base frame, and may have a disk shape with the same diameter. .

The third bushing body part is a core-type connecting member that connects the first bushing body part and the second bushing body part up and down. The third bushing body portion extends axially from the inside of each of the first bushing body portion and the second bushing body portion, and is disposed through the circular opening, so it may have a cylindrical shape with a smaller diameter than the circular opening.

The third bushing body may have a cylindrical shape with a smaller diameter than the circular opening, and may be provided with a circular central opening on the inside that is concentric with the rotation center of the base frame. And the serration portion may be located in the central opening portion of the third bushing body portion. Meanwhile, a support step may be provided on the inside of the other end of the third bushing body portion to support and support the serration portion located in the central opening portion.

In the motor for clothing equipment according to an embodiment of the present invention, the rotor bushing is formed integrally with the base frame and includes a bushing body portion with a plurality of gaps formed between the rotor bushing and the base frame.

The plurality of gaps include first and second gaps formed at different positions.

The bushing body portion includes a first bushing body portion formed at a distance from one side of the base frame by a first gap, a second bushing body portion parallel to the first bushing body portion and in close contact with the other side of the base frame, and one end portion of the bushing body portion. It is connected to the first bushing body portion, and the other end includes a third bushing body portion formed at a distance from the second bushing body portion by the second gap.

At this time, the intake port includes a first intake passage and a second intake passage. The first intake flow path refers to a flow path formed through a first gap to allow air to flow. The second intake passage is in communication with the first intake passage and refers to a passage formed through a second gap to allow air to flow.

The first intake flow path may be formed in the radial direction of the base frame between the flow guide surface of the first bushing body portion and one surface of the base frame. The second intake flow path may be formed in the axial direction along the third bushing body between the second bushing body and the third bushing body. The first intake passage and the second intake passage may intersect and communicate with each other.

With this configuration, the external air of the motor moves in the axial direction along the outer peripheral surface of the third bushing body along the second intake passage when the rotor frame rotates. Subsequently, it flows into the first intake passage that intersects and communicates with the second intake passage and then moves in the radial direction of the base frame along the first intake passage. As a result, the air discharged from the first intake passage moves toward the inside of the motor, especially the coil, and can cool the coil.

In the motor for clothing equipment according to an embodiment of the present invention, the rotor bushing is formed integrally with the base frame and includes a bushing body portion with a plurality of gaps formed between the rotor bushing and the base frame.

The plurality of gaps include first and second gaps formed at different positions.

The bushing body portion includes a first bushing body portion formed at a distance from one side of the base frame by a first gap, a second bushing body portion that is parallel to the first bushing body portion and is in close contact with the other side of the base frame, and one end of the first bushing body portion. It is connected to the bushing body portion, and the other end includes a third bushing body portion formed at an interval equal to the second bushing body portion and the second gap.

At this time, the intake port includes a first intake passage and a second intake passage. The first intake flow path refers to a flow path formed through a first gap to allow air to flow. The second intake passage is in communication with the first intake passage and refers to a passage formed through a second gap to allow air to flow.

In the motor for clothing equipment according to an embodiment of the present invention, the rotor bushing further includes a barrier.

The barrier is provided along the radial direction of the first bushing body on the inside of the first intake passage, and divides the first intake passage radially to allow air sucked through the first intake passage to flow in the radial direction of the first bushing body. It can be guided to the outside.

According to one embodiment of the present invention, the barrier may be formed to have a straight shape in the radial direction of the first bushing body portion inside the first intake passage.

According to another embodiment of the present invention, the barrier may be formed to have an arc shape, that is, an arc shape, with a predetermined curvature in the radial direction of the first bushing body portion inside the first intake passage. Through this, the amount of air to be sucked in when the rotor frame rotates can be increased.

According to one embodiment of the present invention, the barrier may have a constant height.

According to another embodiment of the present invention, the barrier may have a shape whose height gradually increases from the inside of the first intake passage to the radial outside of the first bushing body portion.

The first intake flow path may be formed in the radial direction of the base frame between the flow guide surface of the first bushing body portion and one surface of the base frame.

At this time, the flow guide surface may have a shape that slopes upward toward the other end of the flow guide surface located on the outlet side of the first intake flow path compared to one end of the flow guide surface located on the inlet side of the first intake flow path. As a result, the flow direction of the air flowing inside the motor along the flow guide surface of the first intake flow path rises upward, and as a result, the air can be guided toward the coil, thereby increasing the cooling effect of the coil. .

At this time, the barrier may have a shape whose height gradually increases toward the radial outer side of the first bushing body portion in response to the inclined shape of the flow guide surface.

In the motor for clothing equipment according to an embodiment of the present invention, the rotor bushing is formed integrally with the base frame and includes a bushing body portion with a plurality of gaps formed between the rotor bushing and the base frame.

The plurality of gaps include first and second gaps formed at different positions.

The bushing body portion includes a first bushing body portion formed at a distance from one side of the base frame by a first gap, a second bushing body portion that is parallel to the first bushing body portion and is in close contact with the other side of the base frame, and one end of the first bushing body portion. It is connected to the bushing body portion, and the other end includes a third bushing body portion formed at an interval equal to the second bushing body portion and the second gap.

At this time, a round connection portion may be formed at the cross connection portion between the first bushing body portion and one end of the third bushing body portion. The round connection part can smoothly change the direction of movement of the intake air when the intake air moves along the second intake passage and then moves along the first intake passage that intersects and communicates with the second intake passage. . As a result, the amount of intake air can be increased.

In the motor for clothing devices according to an embodiment of the present invention, the rotor bushing includes a bushing body portion integrally formed with a base frame, the base frame may be made of a metal material, and the bushing body portion may be made of an injectable resin material. In this way, compared to the rotor frame made of metal material (e.g., steel, etc.), the rotor bushing made of injection moldable resin is easier to implement various shapes, and the intake flow path can be formed more easily. For this reason, the rigidity of the motor can be improved by not changing the shape of the rotor frame or forming structural holes, and productivity can be improved by changing the structure of the rotor bushing.

In the motor for a clothing device according to an embodiment of the present invention, the rotor bushing includes a bushing body portion integrally formed with the base frame, and the bushing body portion may be insert-molded into the base frame. Accordingly, the base frame and rotor bushing can be manufactured as one piece without using separate fastening parts between the base frame and rotor bushing, thereby improving machinability.

According to another embodiment of the present invention, a stator including an annular core and a coil wound on the core, a magnet disposed with an air gap outside the stator, and a rotor frame that fixes the magnet and rotates outside the stator. It includes a rotor that receives rotational force from the rotor frame and a drive shaft that rotates. The rotor frame is arranged to face the coil at an interval, and includes a circular base frame with a circular opening formed at the rotation center, an extension frame connected in a cylindrical shape along the edge of the base frame, and a circular opening for fixing the magnet to the inner peripheral surface. It is located in and includes a rotor bushing to which the drive shaft is fastened, and an intake port that intakes outside air into the interior of the rotor frame through a plurality of gaps formed between the base frame and the rotor bushing, and the intake port allows air through each of the plurality of gaps. It includes a motor for a clothing device including first and second intake passages through which .

The rotor bushing is formed integrally with the base frame, has a bushing body portion with a plurality of gaps formed between it and the base frame, and a serration located at the center of the bushing body portion and having a serration-shaped hole into which the drive shaft is fastened. Includes wealth.

In addition, the rotor bushing is formed integrally with the base frame and includes a bushing body portion with a plurality of gaps formed between it and the base frame, and the plurality of gaps include first and second gaps formed at different positions. The bushing body portion includes a first bushing body portion formed at a distance from one side of the base frame by a first gap, a second bushing body portion that is parallel to the first bushing body portion and is in close contact with the other side of the base frame, and one end of the first bushing body portion. It is connected to the bushing body portion, and the other end includes a third bushing body portion formed at an interval equal to the second bushing body portion and the second gap.

At this time, the first intake flow path may be formed in the radial direction of the base frame between the flow guide surface of the first bushing body portion and one surface of the base frame so that air sucked in through the first gap flows.

The second intake flow path may be formed in the axial direction along the third bushing body between the second and third bushing bodies so that the air sucked in through the second gap flows.

According to another embodiment of the present invention, the rotor bushing is provided along the radial direction of the first bushing body portion on the inside of the first intake passage, and divides the first intake passage radially to allow air sucked into the first intake passage. It is possible to provide a motor for a clothing device further comprising a barrier that guides the first bushing body portion in the radial direction.

According to an embodiment of the present invention, in a motor for clothing equipment in which the rotor rotates outside the stator, the rigidity of the motor is prevented from being reduced by not changing the shape or removing part of the rotor frame, which has a significant influence on maintaining the rigidity of the motor. , the heat dissipation performance of the motor can be improved by providing an intake port.

In addition, according to an embodiment of the present invention, a plurality of holes or blades for intake are not formed in the lower portion (i.e., base frame) or side (i.e., extension frame) of the rotor frame as in the conventional structure, thereby reducing the rigidity of the motor. can be prevented. In particular, according to an embodiment of the present invention, a heat dissipation function can be secured without changing the shape of the rotor frame or removing parts of it by forming an intake port in the gap between the rotor frame and the shaft connection (i.e., rotor bushing).

In addition, according to an embodiment of the present invention, compared to a rotor frame made of steel, the rotor bushing has the advantage of being an injection moldable material, making it easy to implement various shapes, and various types of intake flow paths can be easily applied to the inside of the rotor bushing. there is. Accordingly, there is an advantage in providing a flow path structure that can appropriately guide the direction of air flow necessary for cooling the coil while maintaining the rigidity of the motor.

As an example, the height of the barrier located inside the rotor bushing can be increased toward the radial outer side, while the inner guide surface of the rotor bushing in contact with the upper end of the barrier can be formed to have a shape that slopes upward toward the radial outer side. In this case, the sucked air can pass through the rotor bushing and move upward in the radial direction of the rotor frame along the inner guide surface of the rotor bushing, thereby increasing the cooling effect of the coil and improving motor heat dissipation performance. .

As another example, the barrier located inside the rotor bushing may be formed to have an arc shape in a forward or backward direction as it moves outward in the radial direction. In this case, the air volume increases and, as a result, the heat dissipation performance of the motor can be improved.

In addition, according to an embodiment of the present invention, in a motor for clothing devices in which the rotor rotates outside the stator, sufficient space for coil winding is secured by not applying a structure such as a blade to the rotor frame that protrudes toward the bottom of the coil. can do. Accordingly, the output and efficiency of the motor can be improved without increasing the size of the motor.

In addition to the above-described effects, specific effects of the present invention are described below while explaining specific details for carrying out the invention.

1 is a cross-sectional view showing the overall structure of a driving device for clothing equipment according to an embodiment of the present invention.
Figure 2 is a half-cross-sectional perspective view showing a motor for clothing devices according to an embodiment of the present invention.
FIG. 3 is an enlarged view of “A” in FIG. 2 showing the rotor bushing and the intake port.
FIG. 4 is an enlarged view of “A” in FIG. 2 showing a barrier formed inside the rotor bushing.
Figure 5 is a diagram showing the flow direction of air in Figure 4.
Figure 6 is a perspective view schematically showing the rotor bushing of a motor for clothing devices according to an embodiment of the present invention.
Figure 7 is a plan view briefly showing the rotor bushing of a motor for clothing devices according to an embodiment of the present invention.
Figure 8 is a side view briefly showing the rotor bushing of a motor for clothing devices according to an embodiment of the present invention.
Figure 9 is a rear view briefly showing the rotor bushing of a motor for clothing devices according to an embodiment of the present invention.
FIG. 10 is a diagram illustrating the “BB” section of FIG. 3 and showing air flowing between the barriers.
Figure 11 is a cross-sectional view showing an intake port formed through a gap between the base frame and the rotor bushing of a motor for clothing equipment according to an embodiment of the present invention.
Figure 12 is an enlarged view showing the cross-sectional structure of an intake port according to an embodiment of the present invention.
Figure 13 is an enlarged view showing the cross-sectional structure of an intake port according to another embodiment of the present invention.
Figure 14 is a perspective view showing a comparative example for comparison with the rotor frame according to an embodiment of the present invention.
FIG. 15 is an enlarged view of a portion of the comparative example shown in FIG. 14.
Figure 16 is a diagram showing the difference in coil winding height between the embodiment of the present invention and the comparative example.

The above-mentioned objects, features, and advantages will be described in detail later with reference to the attached drawings, so that those skilled in the art will be able to easily implement the technical idea of the present invention. In describing the present invention, if it is determined that a detailed description of known technologies related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the attached drawings. In the drawings, identical reference numerals are used to indicate identical or similar components.

Although first, second, etc. are used to describe various components, these components are of course not limited by these terms. These terms are only used to distinguish one component from another component, and unless specifically stated to the contrary, the first component may also be a second component.

Throughout the specification, unless otherwise stated, each element may be singular or plural.

Hereinafter, the “top (or bottom)” of a component or the arrangement of any component on the “top (or bottom)” of a component means that any component is placed in contact with the top (or bottom) of the component. Additionally, it may mean that other components may be interposed between the component and any component disposed on (or under) the component.

Additionally, when a component is described as being “connected,” “coupled,” or “connected” to another component, the components may be directly connected or connected to each other, but the other component is “interposed” between each component. It should be understood that “or, each component may be “connected,” “combined,” or “connected” through other components.

As used herein, singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, terms such as “consists of” or “comprises” should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or steps may include It may not be included, or it should be interpreted as including additional components or steps.

Additionally, as used herein, singular expressions include plural expressions, unless the context clearly dictates otherwise. In the present application, terms such as “consists of” or “comprises” should not be construed as necessarily including all of the various components or steps described in the specification, and some of the components or steps may include It may not be included, or it should be interpreted as including additional components or steps.

Throughout the specification, when referred to as “A and/or B”, this means A, B or A and B, unless specifically stated to the contrary, and when referred to as “C to D”, this means unless specifically stated to the contrary. Unless there is one, it means that it is C or higher and D or lower.

[Overall structure of a driving device for clothing devices using a clothing device motor]

1 is a cross-sectional view showing the overall structure of a driving device for clothing equipment according to an embodiment of the present invention.

The driving device 1000 for clothing devices includes a motor 100 for clothing devices, a rotor bushing 200, a clutch 410, an inner shaft 310, an outer shaft 320, a gear 520, and a bearing housing 600. , including first and second bearings 610 and 620.

In addition to the above configuration, the driving device 1000 for a clothing device may further include various detailed configurations that can be conventionally used in a washing machine or dryer.

The motor 100 for clothing equipment includes a stator 110 and a rotor 120.

The stator 110 includes a core 111 and a plurality of coils 113.

The core 111 has an annular body surrounding the drive shaft 510 in the circumferential direction, and the plurality of coils 113 may be mounted by winding the annular core 111 at regular intervals.

The rotor 120 includes a plurality of magnets 121 and a rotor frame 130.

The plurality of magnets 121 may be arranged outside the stator 110 to face each other with a predetermined air gap. The plurality of magnets 121 may be arranged outside the stator 110 to surround the stator 110 in the circumferential direction.

The rotor frame 130 is a cylindrical frame that fixes a plurality of magnets 121 and can rotate outside the stator 110 by electromagnetic force between the plurality of magnets 121 and the plurality of coils 113. there is.

A drive shaft 510 is connected to the center (i.e., rotation center) of the rotor frame 130, and the rotational force of the rotor frame 130 is transmitted to the drive shaft 510.

The rotor frame 130 includes a circular base frame 140, a rotor bushing 200, and an intake port 170.

The circular base frame 140 may be arranged to face the coil 113 at a predetermined distance in the axial direction. A circular opening 143 may be formed at the center (i.e., rotation center) of the circular base frame 140.

The rotor bushing 200 is a member to which the drive shaft 510 is fastened, and may be formed integrally with the base frame 140 to be located in the circular opening 143.

The intake port 170 refers to an air flow path, that is, a flow path, that intakes air outside the rotor frame 130 into the interior of the rotor frame 130 when the rotor frame 130 rotates. The intake port 170 may be located in the gap 150 (151, 152) formed between the base frame 140 and the rotor bushing 200 (see FIG. 3).

The rotor bushing 200 includes a bushing body portion 210 and a serration portion 290.

Unlike the rotor frame 130, the bushing body portion 210 refers to an injection-molded member that can be easily implemented into various shapes.

The intake port 170 may be formed using the space secured by a plurality of gaps 150 (151, 152) (see FIG. 3) formed between the bushing body portion 210 and the base frame 140.

Since the bushing body portion 210 is made of an injectable resin material, unlike the rotor frame 130 made of a metal material (e.g., steel, etc.), it can be easily implemented in various shapes.

As a specific example, the bushing body portion 210 includes a first bushing body portion 211, a second bushing body portion 213, and a third bushing body portion 215.

The first bushing body portion 211 is a disk-shaped member arranged horizontally at a distance from one surface (i.e., upper surface) of the base frame 140. The second bushing body portion 213 may be parallel to the first bushing body portion 211 and may be in close contact with the other surface (i.e., lower surface) of the base frame 140. And the third bushing body portion 215 may be positioned in the form of a cylindrical core on the center of the first bushing body portion 211 and the second bushing body portion 213.

The bushing body portion 210 is made of an integrated structure with the base frame 140, and a plurality of gaps 150: 151, 152 (see FIG. 3) are formed between the bushing body portion 210 and the base frame 140. And the intake port 170 can be formed using the gap space. Accordingly, structural changes to the rotor frame 130 or processing to form holes for air inflow are not required, and a decrease in the rigidity of the rotor frame 130 can be prevented.

Additionally, the bushing body portion 210 further includes a barrier 220. The barrier 220 is located inside the intake port 170 (more specifically, the first intake passage 171 (see FIG. 3)) provided on the lower side of the first bushing body portion 211.

The barrier 220 can guide the intake of air into the motor by flowing air in the radial direction of the first bushing body portion 211.

The serration portion 290 is located at the center of the bushing body portion 210 and is a component to which the drive shaft 510 is directly fastened. A serration-shaped hole 291 fastened to the drive shaft 510 may be provided at the center of the serration portion 290.

In this way, the serration portion 290 is fastened to the drive shaft 510 in a serration manner and can transmit rotational force of large torque to each other. For this purpose, the serration portion 290 may be made of a metal material with excellent rigidity, unlike the bushing body portion 210.

The clutch 410 can be selectively connected to and disengaged from a clutch bushing provided on the upper part of the rotor bushing 200. For example, the clutch 410 slides up and down along the axial direction of the drive shaft 510 by the operation of the solenoid 420, and thus the output of a clothing machine, such as a washing machine, can be adjusted. there is.

The rotational force output from the motor 100 for clothing devices is transmitted to the drive shaft 510 through the rotor frame 130. The rotational force transmitted to the drive shaft 510 may be transmitted through the inner shaft 310 and/or the outer shaft 320 to output the torque required for the clothing device.

The inner shaft 310 and the outer shaft 320 may be installed at the same center as the drive shaft 510.

For example, the inner shaft 310 may be connected to the rotor 120 to receive the rotational force of the motor 100 for clothing devices. And the outer shaft 320 may be configured to be selectively connected to the rotor 120.

The clutch 410 can control connection and disconnection between the outer shaft 320 and the rotor 120 by operating the solenoid 420.

The seal portion 330 may be provided between the inner shaft 310 and the outer shaft 320. The seal part 330 provides the function of sealing the space between the inner shaft 310 and the outer shaft 320.

Additionally, an oilless bearing 340 may be further provided between the inner shaft 310 and the outer shaft 320.

The gear 520 may include a sun gear 521 and a planetary gear 523.

The sun gear 521 is connected to the drive shaft 510 and can rotate together with the drive shaft 510 by the rotational force transmitted from the rotor frame 130.

The planetary gear 523 is arranged to surround the outside of the sun gear 521, and a plurality of planetary gears 523 may be arranged around the sun gear 521 on the outside.

The planetary gear 523 engages and rotates with the sun gear 521, and can rotate at an appropriate torque and rotation speed according to the gear ratio set between the sun gear 521 and the planetary gear 523.

The bearing housing 600 is disposed at the bottom of a tub of a clothing machine, for example, a washing machine, and may be fixed to the tub without rotating. The bearing housing 600 may have a structure in which the upper and lower ends are supported by the first bearing 610 and the second bearing 620.

[Motor for clothing equipment]

Figure 2 is a half-cross-sectional perspective view showing a motor for clothing equipment according to an embodiment of the present invention, Figure 3 is a view showing the rotor bushing and the intake port enlarged at "A" in Figure 2, and Figure 4 is a view showing the rotor bushing and the intake port in Figure 2. This is an enlarged view of "A" showing the barrier formed inside the rotor bushing. And FIG. 5 is a diagram showing the direction of air flow in FIG. 4.

As shown, the motor 100 for clothing equipment according to an embodiment of the present invention includes a stator 110 and a rotor 120.

The stator 110 includes a core 111 and a plurality of coils 113. The core 111 is located inside the rotor 120. For example, the core 111 may be provided in an annular shape surrounding the drive shaft 510 (see FIG. 1) in a circumferential direction.

The coil 113 may be wound on the core 111 and mounted on the core 111. A plurality of coils 113 may be provided in the core 110. For example, the plurality of coils 113 may be mounted on the annular core 113 in the circumferential direction at predetermined intervals.

If the volume in which the coil 113 is wound increases, the output or efficiency of the motor may be improved. For this reason, in order to improve the output or efficiency of the motor, it is advisable to sufficiently secure the space where the coil 113 is located, that is, the coil winding space 142.

The rotor 120 includes a plurality of magnets 121 and a rotor frame 130.

A plurality of magnets 121 are arranged in a circle on the outside of the coil 113, and each magnet 121 may be spaced apart from the stator 110 with a certain air gap therebetween.

The rotor frame 130 has a cylindrical shape with one side open, and a plurality of magnets 121 may be mounted on the inner circumferential surface of the rotor frame 130 in the circumferential direction. The rotor frame 130 rotates outside the stator 110 by electromagnetic force between the plurality of coils 113 and the plurality of magnets 121. In this way, a motor in which the rotor frame 130 rotates outside the stator 110 is called a motor with an outer rotor or an external rotor motor.

Drive shaft 510 (see FIG. 1) is axially connected to the center of rotor frame 130. To this end, the drive shaft 510 (see FIG. 1) may be fastened to the rotor bushing 200 located at the center of the rotor frame 130 in a serration manner.

The drive shaft 510 (see FIG. 1) may receive the rotational force of the rotor frame 130 and rotate together with the rotor frame 130.

The rotor frame 130 includes a circular base frame 140, an extension frame 180, a rotor bushing 200, and an intake port 170.

The base frame 140 refers to a disk-shaped frame arranged to face the coil 113 up and down at a distance in the height direction.

The base frame 140 may be arranged to face the coil 113 at a predetermined distance in the axial direction. A circular opening 143 may be formed at the center (i.e., rotation center) of the base frame 140.

The rotor bushing 200 refers to a bushing (or bush) to which the drive shaft 510 is fastened.

The rotor bushing 200 is located in the circular opening 143 and may have an integrated structure with the base frame 140.

The intake port 170 refers to a flow path that intakes external air into the interior of the rotor frame 130 when the rotor frame 130 rotates.

The intake port 170 may be formed between the base frame 140 and the rotor bushing 200. In other words, gaps 150: 151, 152 (see FIG. 3) are formed between the base frame 140 and the rotor bushing 200, and the intake port 170 has gaps 150: 151, 152 (see FIG. 3). ) can be formed using the space secured by.

The rotor bushing 200 includes a bushing body portion 210 and a serration portion 290.

The rotor bushing 200 may be formed integrally with the base frame 140 in a form that covers the circular opening 143 formed at the center of the base frame 140.

For example, in the base frame 140, a central step 141 that protrudes convexly upward relative to the remaining area may be provided around the circular opening 143. And, on the outside of the central step portion 141, an inclined peripheral surface 1411 may be provided to connect the steps in a gently sloping shape.

The rotor bushing 200 may be formed in a shape that covers the circular opening 143. The rotor bushing 200 is connected to the central step 141. The rotor bushing 200 is supported on both sides of the central step 141 with the central step 141 in between, and is connected in an integrated structure. You can.

While the base frame 140 is made of a metal material (eg, steel, etc.), the bushing body portion 210 is made of an injectable resin material. For this reason, the structure and shape of the bushing body portion 210 can be easily changed, and the intake port 170 with a complex flow path can be easily formed.

The intake port 170 uses the gaps 150: 151, 152 (see FIG. 3) provided between the bushing body 210 and the base frame 140 through injection molding of the bushing body 210 to provide a plurality of intakes. You can have euros (171, 172). Accordingly, the base frame 140 does not require difficult work such as structural changes or hole machining, and it is possible to prevent a decrease in the rigidity of the motor.

The serration portion 290 is located at the center of the bushing body portion 210. The serration portion 290 includes a serration-shaped hole 291. The serration-shaped hole 291 refers to a hole into which the drive shaft 510 (see FIG. 1) is inserted and fastened in a serration manner.

At this time, the serration portion 290 is preferably made of a metal material with excellent rigidity, unlike the injection moldable bushing body portion 210. Since the serration portion 290 is a bushing component that is fastened to the drive shaft 510 (see FIG. 1) in a serration manner and transmits rotational force to each other, it is better to use a material with high self-rigidity in order to transmit a large torque.

The extension frame 180 refers to a circular tube-shaped frame connected along the circumferential direction at the edge of the base frame 140.

A plurality of magnets 121 may be fixed to the inner peripheral surface of the extension frame 180. The extension frame 180 forms a side surface of the rotor frame 130 and may be formed to have a constant thickness. For this reason, when a hole for intake or flow of air is formed in the extension frame 180, the rigidity of the motor may be reduced.

The motor for clothing equipment according to an embodiment of the present invention has the advantage of preventing a decrease in the rigidity of the motor by not forming a hole for sucking air in the base frame 140 as well as the extension frame 180.

The rotor frame 130 is a structure in which a disk-shaped base frame 140 and a circular tubular extension frame 180 are connected, and the overall shape of the rotor frame 130 has a cylindrical shape with a height size smaller than the diameter. You can. A stator 110 including a core 111 and a coil 113 may be mounted inside the cylindrical rotor frame 130 (see FIG. 2).

[Detailed structure of rotor bushing and intake port]

Referring to Figure 3, it shows the intake port 170 formed through the gap between the base frame 140 and the rotor bushing 200. Figure 4 shows the barrier 220 formed inside the rotor bushing 200, and Figure 5 shows the flow direction in which air is sucked in through the intake port 170. And Figure 6 is a perspective view of the rotor bushing, Figure 7 is a top view of the rotor bushing, Figure 8 is a side view of the rotor bushing, and Figure 9 is a rear view of the rotor bushing.

As shown, the rotor bushing 200 includes a bushing body portion 210, a barrier 220 (see FIG. 3), and a serration portion 290.

The rotor bushing 200 is formed integrally with the base frame 140 in a form that covers the circular opening 143 formed at the center of the base frame 140.

The bushing body portion 210 is made of a resin material that can be injected, and can be integrally formed by insert injection into the base frame 140.

Accordingly, the base frame 140 and the rotor bushing 200 can be manufactured as one piece without using separate fastening parts (e.g. bolts, etc.) between the base frame 140 and the rotor bushing 200, thereby improving machinability. It has excellent advantages.

Unlike the base frame 140, the bushing body portion 210 can be injection molded, so it can be easily changed to the required structure and shape, and the intake port 170 of a relatively complex shape can be easily formed.

In this way, the bushing body portion 210 can be easily injection molded, and the intake port 170 is formed through the base frame (150: 151, 152) provided between the bushing body portion 210 and the base frame 140. 140) can be easily formed without structural changes. As a result, there is no need to change the shape of the base frame 140 or process holes, thereby preventing a decrease in the rigidity of the motor.

The serration portion 290 is located at the center of the bushing body portion 210 and includes a serration-shaped hole 291. The drive shaft 510 (see FIG. 1) may be firmly fastened to the serration-shaped hole 291 to enable rotational force to be transmitted between them.

Gaps 150: 151, 152 may be formed between the bushing body portion 210 and the base frame 140.

For example, the gaps 150 (151, 152) include first and second gaps (151, 152) positioned differently from each other.

The bushing body portion 210 includes a first bushing body portion 211, a second bushing body portion 213, and a third bushing body portion 215.

The first bushing body portion 211 may be formed to be spaced vertically from one surface (i.e., upper surface) of the base frame 140 by the first gap 151. The first bushing body portion 211 may have a disk shape with a larger diameter than the circular opening portion 143.

The second bushing body portion 213 may be parallel to the first bushing body portion 211 and may be fixed in close contact with the other surface (i.e., lower surface) of the base frame 140. The second bushing body portion 213 may have a disk shape with a larger diameter than the circular opening portion 143. The second bushing body portion 213 may have a disk shape with the same diameter as the first bushing body portion 211.

The third bushing body portion 215 may have a cylindrical shape with a smaller diameter than the circular opening portion 143.

The third bushing body portion 215 is connected to each other by crossing the inside of each of the first bushing body portion 211 and the second bushing body portion 213, that is, at the center portion, and extends to have a predetermined length in the axial direction to form a circular shape. It may be disposed through the center of the opening 143.

One end 2151 of the third bushing body 215 may be connected to the center portion of the first bushing body 211. Additionally, the other end 2152 of the third bushing body 215 may be formed at a distance equal to the center portion of the second bushing body 213 and the second gap 152.

In this way, the plurality of gaps 150 (151, 152) are formed at different positions according to the structural shape of the first, second, and third bushing body portions (211, 213, and 215) and are in communication with each other.

The first gap 151 is formed according to the height difference between the flow guide surface 212 of the first bushing body 211 and one surface (i.e., upper surface) of the base frame 140, and the second gap 151 Can be formed as the distance between the outer peripheral surface of the other end 2152 of the cylindrical third bushing body 215 and the center of the second bushing body 213.

The intake port 170 includes a first intake passage 171 and a second intake passage 172.

The first intake passage 171 is provided through a gap space provided by the first gap 151, and provides a path through which air sucked in from the outside flows into the interior of the motor.

The second intake passage 172 communicates with the first intake passage 171 and is provided through a gap space provided by the second gap 152, and sends air sucked in from the outside to the first intake passage 171. It provides a path.

Specifically, the first intake passage 171 is located in the first gap 151 between the flow guide surface 212 of the first bushing body 211 and one surface (i.e., upper surface) of the base frame 140. It is formed by utilizing the space secured by

Additionally, the first intake passage 171 may be formed toward the radial direction of the base frame 140.

The second intake passage 172 is formed by utilizing the space secured by the second gap 152 between the second bushing body portion 213 and the third bushing body portion 215.

Additionally, the second intake passage 172 may be formed in the axial direction along the outer peripheral surface of the third bushing body portion 215, and the outlet of the second intake passage 172 is the inlet of the first intake passage 171. communicates with

In this way, the intake port 170 includes a first intake passage 171 formed in the radial direction of the base frame 140, and a second intake passage 172 formed in the axial direction to intersect the first intake passage 171. It can be formed.

Accordingly, the external air of the motor flows into the second intake passage 172 and moves in the axial direction, and then flows into the base frame 140 along the first intake passage 171 that intersects the second intake passage 215. The coil can be cooled by moving in the radial direction. Referring to FIG. 5, the flow direction in which external air is sucked into the motor through the intake port 170 can be confirmed.

According to an embodiment of the present invention, the intake port 170 can be easily manufactured with the bushing body portion 210 of various shapes using an injection method without specifically structurally changing the base frame 140 or machining holes, etc.

In addition, the third bushing body 215 has a cylindrical shape with a smaller diameter than the circular opening 143, and the center of the third bushing body 215 is the same as the rotation center of the base frame 140. A circular central opening 2153 may be provided.

At this time, the serration portion 290 may be inserted into the center opening portion 2153 and fixed to the center of the third bushing body portion 215.

Additionally, a support step 2154 may be further provided inside the other end 2152 of the third bushing body 215. The support step 2154 serves to support the serration portion 290 inserted into the circular central opening portion 2153 from the lower side. Accordingly, the serration portion 290 can be prevented from being separated downward from the third bushing body portion 215.

Meanwhile, a round connection portion 2155 may be further formed at the cross connection portion between the first bushing body portion 211 and one end 2151 of the third bushing body portion 215 (see FIG. 3).

The round connection portion 2155 is a cross wall inside the passage so that air introduced along the second intake passage 172 can flow in the intake direction at the cross connection between the second intake passage 172 and the first intake passage 171. It refers to connecting in a round shape. Accordingly, a smooth flow of air can be induced.

[Barrier structure]

The barrier 220 may be provided along the radial direction of the first bushing body portion 211 on the inside of the first intake passage 171 (see FIGS. 4 and 5).

Hereinafter, the detailed structure of the barrier 220 will be looked at with reference to FIGS. 10 to 13.

FIG. 10 is a diagram illustrating the “B-B” section of FIG. 3 and shows air flowing between the barriers. Figure 11 shows an intake port formed through a gap between the base frame and the rotor bushing. And Figures 12 and 13 show two embodiments of the cross-sectional structure of the intake port.

Referring to FIG. 10, the barrier 220 may be formed in plural pieces to radially divide the first intake passage 171. For example, six barriers 220 may be arranged radially at equal intervals with a central angle of 60 degrees.

The barrier 220 may guide the flow of external air sucked in through the second intake passage 171 to the radial outer side of the first bushing body portion 211 through the first intake passage 171.

Referring to FIG. 10 , the barrier 220 may have a straight shape extending radially from the inside of the first intake passage 171. When the rotor frame rotates due to the formation of the barrier 220, a sufficient amount of air can be sucked into the motor.

As another example, although not separately shown, the barrier 220 extends in the radial direction from the inside of the first intake passage 171, but may have an arc shape (i.e., an arc shape) with a curvature rather than a straight line. . The arc-shaped barrier 220 can be easily implemented by injection molding of the bushing body portion 210. If the barrier 220 has an arc shape, the amount of intake air can be increased.

Referring to FIG. 11, the first gap 151 is formed by a height difference between the flow guide surface 212 of the first bushing body portion 211 and one surface (i.e., upper surface) of the base frame 140. The second gap 151 is formed as the distance between the third bushing body portion 215 and the second bushing body portion 213.

The intake port 170 includes a first intake passage 171 and a second intake passage 172. The first intake passage 171 is formed by the first gap 151, and the second intake passage 172 is formed by the second gap 152.

The first intake flow path 171 is located between the flow guide surface 212 of the first bushing body 211 and one surface (i.e., upper surface) of the base frame 140. (140)) is formed toward the radial direction.

The second intake passage 172 is formed between the second bushing body portion 213 and the third bushing body portion 215, and the outlet of the second intake passage 172 is the inlet of the first intake passage 171. It is formed by connecting with.

Air flows in through the second intake passage 172. Next, air flows in through the inlet of the first intake passage 171, which is connected to the outlet of the second intake passage 215. Subsequently, the air moves from one end 2121 of the flow guide surface 212 of the first bushing body 211 toward the other end 2122 and then flows into the inside of the motor through the outlet of the first intake flow path 171. It can be supplied to cool the coil.

Referring to FIG. 12, the illustrated barrier 220 has a constant height. In other words, the first intake passage 171 may have a constant height from the inlet to the outlet.

That is, the height of one end 2121 and the other end 2122 of the flow guide surface 212 of the bushing body 211 may be formed to be the same.

Accordingly, the air moves in the radial direction along the first intake passage 171 (see FIG. 12). Thereby, air can be used for cooling the motor.

Referring to FIG. 13, the illustrated barrier 220 has a shape whose height gradually increases from the inside of the first intake passage 171 to the radial outside of the first bushing body portion 211. In this case, the first intake passage 171 may have a shape in which the height of the outlet is increased compared to the height of the inlet.

That is, the height of the other end 2122 of the flow guide surface 212 of the bushing body 211 is increased compared to the height of the one end 2121, and the flow guide surface 212 has a radius as shown. It can have a shape that slopes upward in the direction it goes.

Accordingly, the air moving into the motor through the first intake passage 171 moves upward along the inclined flow guide surface 212 (see FIG. 13).

In this way, when the flow direction of the air moving inside the motor rises upward, the air can be guided more intensively toward the coil 113 (see FIG. 2). As a result, the cooling effect of the coil is increased and the heat dissipation performance of the motor can be improved.

The barrier 220 may have a shape in which the height of the upper end increases inclinedly toward the outside in the radial direction in response to the inclined shape of the flow guide surface 212.

FIG. 14 is a perspective view showing a comparative example of a rotor frame in which an intake port and blades are applied to a base frame, and FIG. 15 is an enlarged view of a portion of the comparative example shown in FIG. 14.

Referring to Figures 14 and 15, the rotor frame 33 according to the existing comparative example has an intake port 35 formed directly in the base frame 34. Additionally, a blade 36 protruding at a predetermined height is provided around the intake port 35.

A circular open area is formed in the center of the base frame 34, and the rotor bushing 39 is coupled to this area using a plurality of bolts 40.

Referring to FIG. 15, since the intake port 35 that directly intakes air into the thin disk-shaped base frame 34 according to the existing comparative example is formed through hole processing, there is a problem in that the rigidity of the motor is reduced. .

In addition, a plurality of blades 36 protrude at a predetermined height at a position adjacent to the intake port 35, which causes a problem in that the coil winding space is reduced.

Figure 16 is a diagram showing the difference in height of the coil winding space between the embodiment of the present invention and the comparative example.

The rotor frame 30 according to the existing comparative example has blades 36 protruding from the base frame 34, and the blades 36 are located opposite to the space where the coil is wound. In other words, as the lower end 113a of the coil 113 is disposed to face the blade 36, the volume in which the coil 113 is wound is inevitably reduced by the protruding height of the blade 36. Therefore, in order to increase the output and efficiency of the motor by increasing the volume of the coil 113, there is a problem that the overall size, that is, the overall height, of the motor must be greatly increased.

In contrast, in the rotor frame 130 according to an embodiment of the present invention, the intake port 170 for cooling the motor is formed through the gap between the base frame 140 and the rotor bushing 200, and the first intake passage ( 171) A barrier is formed inside.

As such, according to the embodiment of the present invention, structural changes or hole processing of the base frame 140 are not required, thereby preventing a decrease in the rigidity of the rotor frame 130.

In addition, unlike the existing comparative example, the coil winding space 142 is not provided with a blade protruding toward the lower end 113a of the coil 113, so that the coil winding space 142 can be sufficiently secured. Therefore, the output and efficiency of the motor can be improved without increasing the size of the motor.

Referring to FIG. 15, in the rotor frame 30 according to the existing comparative example, the coil 113 may have a height of CH1.

In contrast, in the rotor frame 130 according to an embodiment of the present invention, the coil 113 may have a height of CH2.

As a result, in the rotor frame 130 structure according to the embodiment of the present invention, it is possible to additionally secure the coil winding space 142 as much as G compared to the rotor frame 30 structure of the comparative example, thereby making the motor more compact and highly efficient. can satisfy.

As described above, the present invention has been described with reference to the illustrative drawings, but the present invention is not limited to the embodiments and drawings disclosed herein, and various modifications may be made by those skilled in the art within the scope of the technical idea of the present invention. It is obvious that transformation can occur. In addition, although the operational effects according to the configuration of the present invention were not explicitly described and explained while explaining the embodiments of the present invention above, it is natural that the predictable effects due to the configuration should also be recognized.

100: Motor for clothing devices
110: Stator
111: core
113: coil
120: rotor
121: Magnet
130: rotor frame
140: Base frame
141: Central step
1411: Inclined perimeter surface
142: Coil winding space
143: circular opening
150: gap
151: first gap
152: Second gap
170: intake port
171: First intake passage
172: Second intake passage
180: Extension frame
200: Rotor bushing
210: Bushing body part
211: First bushing body portion
212: Flow guide surface
2121: One end of the flow guide surface
2122: Other end of flow guide surface
213: Second bushing body part
215: Third bushing body portion
2151: One end of the third bushing body portion
2152: Other end of the third bushing body part
2153: Center opening
2154: Support step
2155: round connection
220: Barrier
290: Serration part
291: Serrated hole
310: Inner shaft
320: Outer axis
330: Seal part
340: Oilless bearing
410: Clutch
420: solenoid
510: drive shaft
520: gear
521: Sun Gear
523: planetary gear
600: Bearing housing
610: first bearing
620: second bearing
1000: Driving device for clothing equipment

Claims (23)

A stator including an annular core and a coil wound around the core;
a rotor including a magnet disposed with an air gap outside the stator, and a rotor frame that fixes the magnet and rotates outside the stator; and
It includes a drive shaft that rotates by receiving rotational force from the rotor frame,
The rotor frame includes a circular base frame disposed facing the coil at a distance from the coil and having a circular opening formed at the center of rotation;
a rotor bushing located in the circular opening and to which the drive shaft is fastened; and
It includes an intake port that intakes external air into the interior of the rotor frame,
The intake port is located in a plurality of gaps formed between the base frame and the rotor bushing, and the plurality of gaps are formed at different positions of the rotor bushing.
Motor for clothing equipment.
According to paragraph 1,
The rotor bushing is,
a bushing body portion formed integrally with the base frame and having the gap formed between the bushing body portion and the base frame; and
a serration portion located at the center of the bushing body portion and having a serration-shaped hole into which the drive shaft is fastened;
A motor for a clothing device further comprising:
According to paragraph 1,
The rotor bushing is,
A bushing body portion formed integrally with the base frame and having a plurality of gaps formed between the base frame and the base frame, wherein the plurality of gaps include first and second gaps formed at different positions; ,
The bushing body portion includes: a first bushing body portion formed at a distance from one surface of the base frame by the first gap;
a second bushing body portion parallel to the first bushing body portion and in close contact with the other surface of the base frame; and
a third bushing body portion whose one end is connected to the first bushing body portion and the other end portion of which is spaced apart from the second bushing body portion by the second gap;
A motor for clothing devices including.
According to paragraph 3,
The first bushing body portion and the second bushing body portion,
Having a disk shape with a larger diameter than the circular opening
Motor for clothing equipment.
According to paragraph 3,
The third bushing body part,
It extends in the axial direction from the inside of each of the first bushing body portion and the second bushing body portion and has a cylindrical shape with a smaller diameter than the circular opening portion.
Motor for clothing equipment.
According to paragraph 1,
The rotor bushing is,
A bushing body portion formed integrally with the base frame and having a plurality of gaps formed between the base frame and the base frame, wherein the plurality of gaps include first and second gaps formed at different positions;
The bushing body portion includes: a first bushing body portion formed at a distance from one surface of the base frame by the first gap;
a second bushing body portion parallel to the first bushing body portion and in close contact with the other surface of the base frame; and
One end is connected to the first bushing body, and the other end is a third bushing body formed at a distance equal to the second gap between the second bushing body and the second bushing body,
The intake port includes a first intake passage through which air flows through the first gap; and
a second intake passage communicating with the first intake passage and through which air flows through the second gap;
A motor for clothing devices including.
According to clause 6,
The first intake flow path is,
Formed in the radial direction of the base frame between the flow guide surface of the first bushing body portion and one surface of the base frame.
Motor for clothing equipment.
According to clause 6,
The second intake flow path is,
Formed in the axial direction along the third bushing body between the second bushing body and the third bushing body.
Motor for clothing equipment.
According to clause 6,
The first intake passage and the second intake passage cross each other and communicate with each other.
Motor for clothing equipment.
According to paragraph 1,
The rotor bushing is,
A bushing body portion formed integrally with the base frame and having a plurality of gaps formed between the base frame and the base frame, wherein the plurality of gaps include first and second gaps formed at different positions; ,
The bushing body portion includes: a first bushing body portion formed at a distance from one surface of the base frame by the first gap;
a second bushing body portion parallel to the first bushing body portion and in close contact with the other surface of the base frame; and
One end is connected to the first bushing body, and the other end is a third bushing body formed at a distance equal to the second gap between the second bushing body and the second bushing body,
The intake port includes a first intake passage through which air flows through the first gap; and
It includes a second intake passage that communicates with the first intake passage and through which air flows through the second gap,
The rotor bushing is,
It is provided along the radial direction of the first bushing body on the inside of the first intake passage, and divides the first intake passage radially to allow air sucked through the first intake passage to flow in the radial direction of the first bushing body. Barrier guiding outwards;
A motor for a clothing device further comprising a.
According to clause 10,
The barrier is,
It is formed to have a straight shape in the radial direction of the first bushing body portion on the inside of the first intake passage.
Motor for clothing equipment.
According to clause 10,
The barrier is,
It is formed to have an arc shape with a predetermined curvature in the radial direction of the first bushing body portion on the inside of the first intake passage.
Motor for clothing equipment.
According to clause 10,
The barrier is,
having a certain height
Motor for clothing equipment.
According to clause 10,
The barrier is,
Having a shape in which the height gradually increases from the inside of the first intake passage to the radial outside of the first bushing body portion.
Motor for clothing equipment.
According to clause 10,
The first intake flow path is,
It is formed in the radial direction of the base frame between the flow guide surface of the first bushing body portion and one surface of the base frame,
The flow guide surface is,
Compared to one end located on the inlet side of the first intake passage, the other end located on the outlet side of the first intake passage is inclined upward to guide the flow direction of air toward the coil,
The barrier is,
It has a shape in which the height gradually increases toward the radial outer side of the first bushing body portion in response to the inclined shape of the flow guide surface.
Motor for clothing equipment.
According to paragraph 1,
The rotor bushing is,
A bushing body portion formed integrally with the base frame and having a plurality of gaps formed between the base frame and the base frame, wherein the plurality of gaps include first and second gaps formed at different positions; ,
The bushing body portion includes: a first bushing body portion formed at a distance from one surface of the base frame by the first gap;
a second bushing body portion parallel to the first bushing body portion and in close contact with the other surface of the base frame; and
One end is connected to the first bushing body, and the other end is a third bushing body formed at a distance equal to the second gap between the second bushing body and the second bushing body,
A round connection is formed at the cross connection portion between the first bushing body portion and one end of the third bushing body portion.
Motor for clothing equipment.
According to paragraph 1,
The rotor bushing is,
It includes a bushing body portion formed integrally with the base frame,
The base frame is made of metal material,
The bushing body portion is made of an injectable resin material.
Motor for clothing equipment.
According to paragraph 1,
The rotor bushing is,
It includes a bushing body portion formed integrally with the base frame,
The bushing body part,
Insert injection into the base frame
Motor for clothing equipment.
A stator including an annular core and a coil wound around the core;
a rotor including a magnet disposed with an air gap outside the stator, and a rotor frame that fixes the magnet and rotates outside the stator; and
It includes a drive shaft that rotates by receiving rotational force from the rotor frame,
The rotor frame includes a circular base frame disposed facing the coil at a distance from the coil and having a circular opening formed at the center of rotation;
An extension frame connected in a cylindrical shape along the edge of the base frame and fixing the magnet to the inner peripheral surface;
a rotor bushing located in the circular opening and to which the drive shaft is fastened; and
It includes; an intake port that intakes external air into the interior of the rotor frame through a plurality of gaps formed between the base frame and the rotor bushing,
The intake port includes first and second intake passages through which air flows through each of the plurality of gaps;
A motor for clothing devices including.
According to clause 19,
The rotor bushing is,
a bushing body portion formed integrally with the base frame and having the plurality of gaps formed between the bushing body portion and the base frame; and
a serration portion located at the center of the bushing body portion and having a serration-shaped hole into which the drive shaft is fastened;
A motor for clothing devices including.
According to clause 19,
The rotor bushing is,
a bushing body portion formed integrally with the base frame and having the plurality of gaps formed between it and the base frame, wherein the plurality of gaps include first and second gaps formed at different positions; ,
The bushing body portion includes: a first bushing body portion formed at a distance from one surface of the base frame by a first gap;
a second bushing body portion parallel to the first bushing body portion and in close contact with the other surface of the base frame; and
a third bushing body portion whose one end is connected to the first bushing body portion, and whose other end portion is spaced apart from the second bushing body portion by a second gap;
A motor for clothing devices including.
According to clause 21,
The first intake flow path is,
It is formed in the radial direction of the base frame between the flow guide surface of the first bushing body portion and one surface of the base frame so that the air sucked in by the first gap flows,
The second intake flow path is,
formed in the axial direction along the third bushing body between the second bushing body and the third bushing body so that the air sucked in by the second gap flows.
Motor for clothing equipment.
According to clause 21,
The rotor bushing is,
It is provided along the radial direction of the first bushing body on the inside of the first intake passage, and divides the first intake passage radially to direct air sucked into the first intake passage to a radius of the first bushing body. a barrier that guides outward;
A motor for a clothing device further comprising:

Images