Motor for washing machine

Abstract

The laundry machine motor of the present invention is characterized by comprising: a motor housing including a stator manufactured by resin molding; and a fixing bracket combined with a rear surface of the motor housing, a rear bearing being disposed inside a resin molding protrusion part formed at the rear of the motor housing, a recessed part of an embedded cylinder body protruding integrally in front of the center of a circular frame body of the fixing bracket being forcedly pressed into the resin molding protrusion part so that the motor housing is combined with the fixing bracket.

Description

Technical Field

[0001] This invention relates to motors for washing machines. More specifically, this invention relates to a motor mounting structure that shortens assembly steps and reduces the overall size of the motor by improving the mounting bracket and motor assembly structure for fixing the drum of a washing machine or dryer, thereby facilitating the securing of installation space for the motor. Background Technology

[0002] Typically, a washing machine includes: a rotating drum, cylindrical in shape, for holding laundry; and a motor, which drives the drum via a belt connected to a rotating shaft at the rear of the drum. This motor needs to be fixed to the body of the washing machine or dryer, and the housing or bracket for fixing the motor is made of aluminum or bulk molding compound (BMC) resin. Using aluminum results in noise or vibration at the motor mounting points, and the material cost is high; therefore, bulk molding compound resin has recently been used for motor housings and brackets. Using bulk molding compound resin offers advantages such as significantly lower noise and vibration, and stronger moisture resistance.

[0003] In a motor using this type of bulk molding compound resin, a fixing bracket formed of bulk molding compound resin is fastened to the motor housing. A fixing bracket is then installed inside the washing machine body, allowing the washing machine to be stably driven by a belt while the motor is supported by the fixing bracket. This technology is representatively disclosed in Korean Patent No. 10-1707142. According to this prior art, a connecting hole is drilled on the lower surface of the motor housing, and a fixing bolt is used to fasten the motor to the fixing holes formed by the first and second brackets, thereby fixing the bracket supporting the motor to the motor.

[0004] However, since the motor housing is made of a bulk molding compound, when the bolts are tightened in the mating hole, the following problem occurs: cracks appear inside the mating hole. As the tightening force is reduced, the motor cannot maintain a firm connection, resulting in noise and vibration during operation and a significant decrease in durability.

[0005] The aforementioned washing machine motor is assembled by inserting a bearing cover into the rear bearing to protect it. Therefore, the assembly process of the motor is complex, requiring the use of connecting bolts to assemble the motor housing and various brackets. This complexity leads to low productivity of the washing machine motor.

[0006] Furthermore, since there are at least one, or multiple, brackets, each individually integrated with the motor housing, the assembly process is not only somewhat complex, but the lack of reinforcement between the first and second brackets makes it difficult to stably integrate the motor with the dryer body. Moreover, even with the fixing holes formed on the first and second brackets matching the mating holes on the motor housing, bolts need to be inserted to assemble the screws, making accurate matching of the fixing holes and mating holes difficult, thus resulting in low productivity.

[0007] In order to solve the above problems, the inventors have proposed a washing machine motor with a novel structure. Summary of the Invention

[0008] The purpose of this invention is to provide a novel structure for a washing machine motor that enables stable assembly of the motor and shortens the assembly process of the motor housing and the mounting bracket.

[0009] Another object of the present invention is to provide a washing machine motor with a novel structure that allows for accurate and easy fastening of the motor housing and the mounting bracket.

[0010] The above-mentioned and other inherent objectives of the present invention can be easily achieved by the present invention as described below.

[0011] The washing machine motor of the present invention is characterized by comprising: a motor housing 11, including a stator 12, which is made of resin molding; and a fixing bracket 20, which is combined with the rear surface of the motor housing 11, wherein a rear bearing 16 is disposed inside a resin molding protrusion 11A formed at the rear of the motor housing 11, and the resin molding protrusion 11A is forcibly pressed into a recess 220 of an embedded cylindrical body 22 that is integrally formed protruding in front of the center of the circular frame body 21 of the fixing bracket 20, so that the motor housing 11 is combined with the fixing bracket 20.

[0012] Preferably, in this invention, a plurality of semi-circular protrusions 240 are formed at predetermined intervals on the inner circumferential surface of the embedded cylindrical body 22, and the outer surfaces of the semi-circular protrusions 240 are respectively pressed tightly against and forcibly pressed into the outer circumferential surface of the resin molded protrusion 11A, so that the embedded cylindrical body 22 and the resin molded protrusion 11A are combined.

[0013] Preferably, in this invention, an anti-slip protrusion 240A is formed along the length direction on the surface of the semi-circular protrusion 240, so that the outer peripheral surface of the resin molded protrusion 11A is in surface contact with the anti-slip protrusion 240A.

[0014] Preferably, in this invention, an elastic member 300 made of rubber or silicone is inserted into the embedded recess 241 formed in the semi-circular protrusion 240, and the outer peripheral surface of the resin molded protrusion 11A is elastically and tightly bonded to the outer surface 300A of the elastic member 300.

[0015] Preferably, in this invention, a position alignment guide protrusion 230 is formed on the front edge of the embedded cylindrical body 22, and a guide groove 11A' is formed on one side around the corresponding resin molded protrusion 11A, so that the motor housing 11 and the fixing bracket 20 are joined together by alignment.

[0016] Preferably, in this invention, the engagement is achieved by inserting the embedded cylindrical body 22 into the embedding hole 11B formed in the resin molding protrusion 11A in front of the guide groove 11A', in front of the position of the guide protrusion 230.

[0017] The present invention has the following advantages: the fixed bracket set inside the washing machine body can easily fasten the motor housing without the need for bolts, shortening the assembly process and preventing noise and vibration through a strong connection.

[0018] Furthermore, the present invention has the following advantages: by placing the rear bearing inside the resin molded protrusion, damage and breakage of the rear bearing can be prevented, and the rear bearing can be protected without the need for a rear bearing cover. Therefore, the assembly process can be shortened and the productivity of the motor can be improved.

[0019] Furthermore, the present invention has the following effect: by forming a fixed body through reinforcing ribs to provide the load-bearing legs constituting the fixed bracket, the motor coupled with the fixed bracket can be stably installed without wobbling, thereby reducing the noise and vibration that occur when the motor is working.

[0020] Furthermore, the present invention has the following effect: it can reduce the size of the motor housing, thereby minimizing the installation space of the motor. Attached Figure Description

[0021] Figure 1 This is a perspective view of the motor for a washing machine according to the present invention, viewed from the front.

[0022] Figure 2 A perspective view of the motor for a washing machine according to the present invention, viewed from the rear.

[0023] Figure 3 This is a perspective view of the disassembled mounting bracket in the motor for a washing machine according to the present invention, viewed from the front.

[0024] Figure 4 This is a perspective view of the disassembled fixing bracket in the motor for a washing machine according to the present invention, viewed from the rear.

[0025] Figure 5 This is a cross-sectional view showing the disassembled fixed bracket in the motor for a washing machine according to the present invention.

[0026] Figure 6 This is a cross-sectional view showing the state in which the fixed bracket is attached to the motor of the washing machine according to the present invention.

[0027] Figure 7 for Figure 6 Sectional view along line AA in the diagram.

[0028] Figure 8 This is a perspective view showing the disassembled fixed bracket in a washing machine motor according to another embodiment of the present invention.

[0029] Figure 9 for Figure 8 Side sectional view.

[0030] The present invention will now be described in detail with reference to the accompanying drawings. Detailed Implementation

[0031] Figure 1 A perspective view of the washing machine motor 10 of the present invention, viewed from the front. Figure 2 This is a perspective view of the washing machine motor 10 of the present invention viewed from the rear. With the motor housing 11 secured to the bracket 20, the motor 10 of the present invention is disposed inside the body of a washing machine or dryer (not shown), thereby stably driving the rotating drum of the washing machine or laundry dryer via a belt or the like while the motor 10 is supported. This specification primarily describes a "washing machine motor," but is not limited to washing machine motors; although the term is used, it can also be applied to motors for laundry dryers or other applications.

[0032] The motor housing 11 of the motor 10 of the present invention is formed by molding a bulk molding compound resin by placing the stator 12 in an insert injection mold. A cylindrical first fixed support portion 14 is formed at a predetermined angle to the front and outer side of the motor housing 11 and protrudes to one side. A rotating shaft 15, which passes through the center of the motor housing 11 and rotates therethrough, is coupled to a rotor 13 facing the stator 12 and rotates together with it. A drive wheel 15A is coupled to the front of the rotating shaft 15 and rotates together with the rotating shaft 15, driving the drum (not shown) of a dryer or washing machine via a belt (not shown). The motor housing 11 and the fixed bracket 20 of the washing machine motor 10 of the present invention can be coupled without bolts.

[0033] Figure 3 This is a perspective view of the disassembled fixing bracket 20 of the washing machine motor 10 of the present invention, viewed from the front. Figure 4This is a perspective view of the disassembled fixing bracket 20 of the washing machine motor 10 of the present invention, viewed from the rear.

[0034] In this invention, a rear bearing 16 is disposed inside the resin molded protrusion 11A at the rear of the motor housing 11, thereby protecting the rear bearing 16 inside the resin molded protrusion 11A.

[0035] The fixing bracket 20 is formed of synthetic resin and includes, integrally, an embedded cylindrical body 22 protruding from the center front of the circular frame body 21; a recess 220 formed at the center of the embedded cylindrical body 22; a plurality of reinforcing pieces 22A connecting the inner periphery of the circular frame body 21 to the outer periphery of the embedded cylindrical body 22; a reinforcing rib 24 protruding to the rear side of the circular frame body 21; and a cylindrical second fixing support 25 formed at the end of the reinforcing rib 24.

[0036] The first cylindrical fixed support portion 14, which protrudes towards the front side of the motor housing 11, and the second cylindrical fixed support portion 25 of the fixed bracket 20 are formed at the same angle and at a predetermined interval, so that the overall weight of the motor housing 11 is oriented towards the first cylindrical fixed support portion 14 and the second fixed support portion 25 of the fixed bracket 20 respectively, thereby preventing the motor housing 11 from tilting to either side and thus stably setting the motor 10.

[0037] The cylindrical first fixed support portion 14 of the motor housing 11 and the cylindrical second fixed support portion 25 of the fixed bracket 20 are shown in the accompanying drawings as being located at the bottom, but are not limited thereto, and can be located above or to the side of the motor housing 11 and the fixed bracket 20.

[0038] In order to mount the motor 10 on the body of the washing machine or dryer, connecting holes 14' and 25' are formed at the center of the first fixed support part 14 and the center of the second fixed support part 25, which are cylindrical in shape and constitute the fixed bracket 20, respectively.

[0039] Figure 5 This is a cross-sectional view showing the disassembled fixed bracket 20 in the washing machine motor 10 of the present invention. Figure 6 This is a cross-sectional view of the washing machine motor 10 of the present invention in the state of being coupled with the fixing bracket 20. Figure 7 for Figure 6 Sectional view along line AA in the diagram.

[0040] Reference Figures 5 to 7Multiple semi-circular protrusions 240 are formed at predetermined intervals on the inner circumferential surface of the embedded cylindrical body 22. The outer surfaces of the semi-circular protrusions 240 are pressed tightly against and forcibly pressed into the outer circumferential surface of the resin molded protrusions 11A, so that the embedded cylindrical body 22 and the resin molded protrusions 11A of the motor housing 11 can form a firm connection without additional bolts.

[0041] Furthermore, anti-slip unevenness 240A is formed along the length direction on the surface of the semi-circular protrusion 240, so that the outer peripheral surface of the resin molded protrusion 11A is in surface contact with the anti-slip unevenness 240A, thereby preventing the motor 10 from being twisted due to vibration of the motor 10 or external impact.

[0042] In this invention, preferably, a position alignment guide protrusion 230 is formed on the front edge of the embedded cylindrical body 22, and a guide groove 11A' is formed on one side around the corresponding resin molded protrusion 11A, so that the motor housing 11 and the fixing bracket 20 are joined together by accurate alignment.

[0043] Furthermore, in this invention, the position of the embedded cylindrical body 22 is aligned with the front of the guide protrusion 230 to form a stable connection by inserting the embedded hole 11B formed in the resin molding protrusion 11A in front of the guide groove 11A', thereby forming a connection between the motor housing 11 and the fixed bracket 20 through accurate alignment.

[0044] As described above, the present invention can force the resin-molded protrusion 11A into the recess 220 of the embedded cylindrical body 22, which is integrally formed and protrudes from the center front of the circular frame body 21 of the fixed bracket 20, so that the motor housing 11 and the fixed bracket 20 can be joined without bolts.

[0045] Therefore, by incorporating the rear bearing 16 into the interior of the resin molded protrusion 11A, the present invention not only prevents damage or breakage of the rear bearing 16, but also protects the rear bearing 16 without the need for a rear bearing cover. This shortens the assembly process of the motor 10 and the mounting bracket 20, thereby improving the productivity of the motor. Furthermore, the motor housing 11 and the mounting bracket 20 can be assembled without the need for bolts, thereby reducing the manufacturing cost of the motor 10.

[0046] Furthermore, the present invention enables the embedded cylindrical body 22, which is integrally formed by protruding from the center front of the circular frame body 21 of the fixed bracket 20, to be combined with the resin molded protrusion 11A of the motor housing 11, thereby minimizing the surrounding dimensions of the motor housing 11.

[0047] Figure 8 This is a perspective view showing the disassembled fixed bracket in a washing machine motor according to another embodiment of the present invention. Figure 9for Figure 8 Side sectional view.

[0048] like Figure 8 and Figure 9 As shown, in another embodiment of the motor of the present invention, an elastic member 300 made of rubber or silicone can be inserted into the embedded recess 241 formed in the semi-circular protrusion 240, and the outer peripheral surface of the resin molded protrusion 11A is elastically and tightly attached to the outer surface 300A of the elastic member 300.

[0049] Therefore, the present invention can be joined by the outer side 300A of the elastic member 300 to the outer peripheral surface of the resin molded protrusion 11A through strong elastic pressure and tight contact. This not only greatly improves the bonding force between the resin molded protrusion 11A of the motor housing 11 and the fixed bracket 20, but also the elastic member 300 absorbs the noise or vibration generated when the motor 10 is driven, thereby preventing noise and vibration.

[0050] It should be noted that the above description of the present invention is merely illustrative for a better understanding of the invention and is not intended to limit the scope of the invention. The scope of the invention is defined by the scope of the claims, and it should be understood that simple modifications or variations of the invention within that scope are included within the scope of the invention.

Claims

1. A motor for a washing machine, characterized in that, include: The motor housing, including the stator, is made of resin molding; and The mounting bracket is integrated with the rear surface of the aforementioned motor housing. The rear bearing is positioned inside the resin-molded protrusion formed at the rear of the motor housing. The resin-molded protrusion is forcibly pressed into the recessed portion of the embedded cylindrical body, which is integrally formed with the central front end of the circular frame body of the mounting bracket. This allows the motor housing and the mounting bracket to be joined without the need for bolts. Multiple semi-circular protrusions are formed at predetermined intervals on the inner circumferential surface of the aforementioned embedded cylindrical body. The outer surfaces of the aforementioned semi-circular protrusions are respectively pressed tightly against and forcibly inserted into the outer circumferential surface of the aforementioned resin molded protrusions, thereby combining the aforementioned embedded cylindrical body with the aforementioned resin molded protrusions. An elastic component made of rubber or silicone is inserted into the recessed groove formed on the semi-circular protrusion, and the outer peripheral surface of the resin molded protrusion and the outer surface of the elastic component are elastically and tightly bonded to each other.

2. The washing machine motor according to claim 1, characterized in that, Anti-slip unevenness is formed along the length direction on the surface of the aforementioned semi-circular protrusion, so that the outer peripheral surface of the aforementioned resin molded protrusion is in surface contact with the aforementioned anti-slip unevenness.

3. The washing machine motor according to claim 1, characterized in that, A positioning guide protrusion is formed at the front edge of the embedded cylindrical body, and a guide groove is formed on one side around the corresponding resin molded protrusion, so that the motor housing and the fixing bracket are joined together by alignment.

4. The washing machine motor according to claim 3, characterized in that, The engagement is achieved by inserting the embedded cylinder into the embedding hole formed by the resin molding protrusion at the front end of the guide groove, aligning the front end of the guide protrusion with the position of the embedded cylinder.

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