KR101185121B1 - Structure for fixing motor of a belt driving motor for a drum type washing machine - Google Patents

Abstract

PURPOSE: A motor fixing structure of a belt driving motor used in a drum laundry machine is provided to maintain concentricity of frontal/rear housings and make materials of the frontal/rear housings different. CONSTITUTION: A frontal housing(10) surrounds a frontal portion of a motor. A base member(20) is integrated with the frontal housing. The base member and the frontal housing are extended from the frontal housing. A predetermined between a rear housing and the frontal housing is maintained. The rear housing is commonly used without respect to specifications of a stator assembly according to motor output. A rotor-stator assembly is fixed between the frontal housing and the rear housing.

Description

Structure for Fixing Motor of A Belt Driving Motor for a Drum Type Washing Machine}

The present invention relates to a motor fixing structure of a belt driving motor applied to a drum washing machine, and more particularly, from a front housing integrally with a front housing.

Extends to form a base member having a fastening part for assembling to the tub of the washing machine, and the rear housing is structurally independent of the washing machine tub assembly, so the rear housing is commonly assembled regardless of the model and washing machine capacity, Constant mounting height improves the characteristics of the motor, and different materials for the front and rear housings reduce vibration and noise, reduce manufacturing costs while improving productivity, and make drums easy to fix the motor to the tub A motor fixing structure of a belt driving motor applied to a washing machine.

In general, the belt driving motor applied to the drum washing machine has a high no-load rotation speed, can be easily obtained at high speed rotation, and high power is required, such as a universal motor, an induction motor, and a Bildish motor.
Among these, Korean Patent No. 100732163 relates to a "universal motor" and discloses a motor made of a plastic injection molded product having a stator and a rotor installed inside a motor housing, a tachometer housing, and a motor housing. In addition, Korean Patent No. 101082883 also relates to a "universal motor" and discloses a universal motor including a stator and a motor housing provided with a rotor, and a tachometer mounting portion formed on the rotor and formed on one side of the motor housing. Meanwhile, US Patent Publication No. 2011/0298312 discloses an electric motor composed of a rotor core, a stator ring, a commutator, a brush, a rear bearing bell, and a bearing mount.

Among the belt driving motors applied to the drum washing machine according to the prior art, the front motor and the rear housing are provided at both front and rear sides to maintain a constant distance, and the stator and the rotor disposed inside the stator are disposed between the front and rear housings. And a commutator for rectifying the current flowing in the rotor so as to flow in only one direction, a brush assembly installed in the rear housing and supplying the current to the commutator, the rotor and the commutator, and penetrate the stator. It comprises a rotating shaft and a tachometer for sensing the speed surrounding the end of the rotating shaft.

The structure for fixing the front and rear motor housing and the brush assembly can be divided into two types. One is to screw the brush assembly onto the rear housing and to assemble and fix the front housing and the rear housing. This structure complicates the motor assembly process because the assembly of the brush assembly must be screwed to the rear housing. In addition, there is a problem that productivity is reduced because it is not easy to maintain concentricity when assembling front and rear housings. In addition, because the output depends on the stator core assemblies stacked between the front and rear housings, the size of the stator core assembly varies according to the washing machine capacity, but the overall length of the front and rear housings including the stator core assembly is generally manufactured within the range of 185 ± 1.5 mm. Since the conventional motor fixing structure has to be manufactured differently for each model in order to meet such a standard, it is difficult to automate production and defects in parts mixing may occur because a number of parts must be precisely manufactured and managed.

The other structure is the rear housing and the brush holder is integrated, inserting the brush and terminally brushed the lead wire to the motor housing projection, and the torsion spring is inserted into the spring support projection to push the brush to be. However, in such a structure, there is a problem such that there is a risk of electric shock due to exposure of the leader line and the torsion spring, and even in such a structure, it is difficult to maintain concentricity when assembling the front and rear housings, and the hassle of separately manufacturing the rear housing by model There is a problem that this is reduced.

The present invention has been made to overcome the above-described problems of the prior art, an object of the present invention is to form a fastening unit for the washing machine tub assembly extending from the front housing and the front housing is integrally formed so that the concentricity of the front and rear housing is kept constant. At the same time, the purpose of the present invention is to reduce noise and vibration by reducing the materials of the front housing and the rear housing, and to reduce the manufacturing cost and the assembly labor of the motor.

Another object of the present invention is to form and assemble the rear housing and the brush holder in one piece, so that the rear housing can be used in common regardless of the stack thickness of the stator core assembly for the motor output that varies with the model and the washing machine capacity. It is to provide a motor fixing structure of a belt driving motor applied to a drum washing machine excellent in economic efficiency.

One embodiment of the present invention for achieving the above object is

In the structure for fixing the belt drive motor applied to the drum washing machine,

A front housing formed to surround the front part of the motor;

A base member extending from the front housing integrally with the front housing;

A rear housing spaced from the front housing and commonly used regardless of the specification of the stator assembly according to the motor output,

A motor fixing structure of a belt driving motor applied to a drum washing machine in which a rotor-stator assembly is tightly fixed between the front housing and the rear housing.

The motor fixing structure of the belt driving motor applied to the drum washing machine of the present invention has the advantage that the motor fixing structure attached to the tub of the washing machine is integrally formed so that the flatness and concentricity are excellent and the dimensional stability is secured. Regardless of the specifications of the core assembly, the parts can be shared, enabling automated production and fundamentally eliminating parts mixing problems.

In addition, since the housing parts of the motor fixing structure are unified, it is easy to manage inventory and reduce the management cost, and the brush can be assembled quickly according to the one-piece rear housing, which simplifies the assembly process and reduces the production cost and improves the productivity. Can be.

Furthermore, by adopting materials of the front housing and the rear housing differently according to the characteristics of each component, it is possible to reduce the material cost to improve the price competitiveness.

1A is an exploded perspective view schematically illustrating a motor fixing structure of a belt driving motor applied to a conventional drum washing machine.
FIG. 1B is a schematic perspective view illustrating a state in which a motor fixing structure of a belt driving motor applied to the conventional drum washing machine of FIG. 1 is assembled together with a rotor-stator assembly.
Figure 2 is an exploded perspective view schematically showing the motor fixing structure of the belt driving motor applied to the drum washing machine of one embodiment of the present invention.
3 is a schematic perspective view illustrating a state in which a motor fixing structure of a belt driving motor applied to a drum washing machine of the present invention is assembled together with a rotor-stator assembly.
4 is a schematic side view of the motor fixing structure of the belt driving motor applied to the drum washing machine of the embodiment of the present invention assembled together with the rotor-stator assembly.
5 is an exploded perspective view schematically showing a motor fixing structure of a belt driving motor applied to a drum washing machine according to another embodiment of the present invention.

Hereinafter, a motor fixing structure of a belt driving motor applied to a drum washing machine according to embodiments of the present invention will be described in more detail with reference to the accompanying drawings. Embodiments of the present invention are shown by way of example, and are not limited to the configuration of the accompanying drawings. It is to be understood that other embodiments may be utilized and structural or logical changes may be made without departing from the scope of the present invention. In order not to obscure the present invention, a detailed description of known configurations may be omitted or simplified.

2 is an exploded perspective view of a motor fixing structure of a belt driving motor applied to a drum washing machine according to an embodiment of the present invention, and FIG. 3 is a schematic view showing a state in which the motor fixing structure of FIG. 2 is coupled to a rotor-stator assembly. 4 is a side view of the motor fixing structure of FIG. 2 coupled with the rotor-stator assembly.

As shown in FIG. 2, the motor fixing structure in one embodiment of the present invention is a structure for fixing a motor of a belt driving motor applied to a drum washing machine, the front housing 10 being formed to surround the front part of the motor. ); A base member 20 integrally formed with the front housing and extending from the front housing; And a rear housing 30 which maintains a constant distance from the front housing. Referring to FIG. 4, the armature assembly 52 and the stator core assembly 53 of the belt driving motor applied to the drum washing machine are tightly fixed between the front housing 10 and the rear housing 30. An amateur assembly 52 and a stator core assembly 53 are disposed above the base member 20 extending from the front housing 10. The stator core assembly 53 and the rear housing 30 may be fastened by screws 5.

The rear housing 30 may be integrally formed with the brush holder 40 for inserting a brush assembly for supplying current to the commutator of the belt driving motor. That is, the rear housing 30 and the brush holder 40 may be injection molded integrally as the same plastic material. As such, when the rear housing 30 and the brush holder 40 are integrally formed, selective assembly of the motor can be freely performed while reducing assembly labor and cost.

The front housing 10 may be formed of a nonferrous metal material, and the rear housing 30 may be an injection molded product made of a plastic material. The front housing 10 may be cast by a non-ferrous metal material (eg, aluminum) by die casting or the like.

In another embodiment of the present invention, the rear housing 47, as shown in Figure 5, may be a press produced by pressing a steel sheet excellent in rigidity. In this way, when the iron plate press is used as a material of the rear housing, it is possible not only to improve the characteristics of noise and vibration, but also to reduce the unit cost. In this embodiment, the brush holder 40 'may be configured separately from the rear housing 47.

The front housing 10 has a through hole (not shown) through which the rotating shaft of the motor penetrates in the center thereof, and a pair of fastenings for fixing the motor to the main body on which a motor such as a washing machine is mounted at both left and right sides of one edge thereof. The portion 11 is extended.

The base member 20 may be provided with a pair of fastening portions 21 that maintain concentricity with the fastening portions 11 of the front housing 10 at an end portion facing the front housing 10.

Another aspect of the present invention relates to a belt drive motor motor applied to the drum washing machine including the motor fixing structure described above. 3 and 4, such a motor is interposed between the front housing 10 and the rear housing 30 and the front housing 10 and the rear housing 30 disposed at predetermined intervals on both front and rear sides. A rotor-stator assembly 50 including a rotor assembly 52 and a stator core assembly 53 disposed on the base member 20, and rotating by magnetic force inside the rotor-stator assembly 50. Rotor (not shown) that can be disposed, a rotary shaft rotatably coupled to the front housing 10 and the rear housing 30 so as to be coupled to the center of the rotor to transmit the rotational force, and fixedly installed behind the rotary shaft And a commutator (not shown) for rotating the rotor in a predetermined direction while alternately switching the supplied current, and fixedly installed in the rear housing 30 so as to contact the commutator to supply current to the commutator. It may comprise a brush assembly for feeding and may include the tachometer (not shown) for sensing the rotational speed of the rotor provided in the rear housing 30.

In the belt driving motor applied to the drum washing machine of the present invention, the base member 20 is extended to the front housing 10 so that the size of the motor fixing structure is kept constant regardless of the size of the rotor-stator assembly 50. Since the rear housing 30 need not be manufactured and assembled separately according to the rotor-stator assembly, the assembly process of the motor fixing structure can be simplified, thereby reducing the production cost of the belt driving motor applied to the drum washing machine. Productivity can be increased.

The operation of the belt driving motor applied to the drum washing machine according to the present invention as described above will be described. When the current applied to the stator core assembly is transmitted to the brush assembly, the polarity of the current transmitted to the brush assembly is reversed by the commutator, and the rotor rotates to rotate the rotating shaft, which rotates the rotational force of the rotor in a washing machine or the like. It is transmitted to the whole to make a continuous rotation. At this time, the tachometer can be controlled to rotate at an appropriate speed by detecting the rotational speed of the rotating shaft rotating with the rotor.

Although the above has been illustrated and described with respect to preferred embodiments of the present invention, the present invention is not limited to the specific embodiments described above, but in the art to which the invention pertains without departing from the spirit of the invention as claimed in the claims. Various modifications can be made by those skilled in the art, and it should be understood that such modifications are included in the protection scope of the present invention. Of course, changes in shape, material, dimensions, etc. are possible without departing from the scope of the technical idea of the present invention. For example, the motor fixing structure of the present invention is suitable for a universal motor, but can also be applied to other belt type motors such as BLDC motors and induction motors.

10: front housing 20: base member
11, 21: fastening portion 30: rear housing
40, 40 ': Brush holder 47: Rear housing (steel plate)
52: amateur assembly 53: stator core assembly
50: rotor-stator assembly 5: screw

Claims (7)

In the structure for fixing the belt drive motor applied to the drum washing machine,
A front housing formed to surround the front part of the motor;
A base member extending from the front housing integrally with the front housing;
A rear housing spaced from the front housing and commonly used regardless of the specification of the stator assembly according to the motor output,
A motor fixing structure of a belt driving motor applied to a drum washing machine in which a rotor-stator assembly is tightly fixed between the front housing and the rear housing.
The motor fixing of the belt driving motor applied to the drum washing machine according to claim 1, wherein the rear housing is integrally formed with a brush holder for inserting a brush assembly for supplying current to the commutator of the belt driving motor. Structure.
According to claim 2, wherein the front housing is formed of a non-ferrous metal material, the rear housing is a motor fixing structure of the belt drive motor applied to the drum washing machine, characterized in that the injection molded integrally formed with the brush holder and a plastic material. .
The motor fixing structure of claim 1, wherein the front housing and the rear housing are not made of the same material.
According to claim 1, wherein the rear housing is fixed to the motor of the belt drive motor to be applied to the drum washing machine, characterized in that the pressing material of the iron plate material.
The drum according to claim 1, wherein the front housing has a through hole through which a rotating shaft of the motor penetrates in a center thereof, and a pair of fastening holes for fixedly coupling the motor to left and right sides of an edge of one end thereof is formed. Motor fixing structure of the belt driving motor applied to the washing machine.
The motor fixing structure of claim 1, wherein the base member includes a fastening part at the end opposite to the front housing, the fastening part keeping the fastening part of the front housing concentric with the fastening part of the front housing. .

Images