KR100597609B1 - A motor shaft mounting structure for microwave oven - Google Patents

Abstract

The present invention relates to a shaft mounting structure of a drive motor for a microwave oven. In the present invention, the tray 38 is installed in the cooking chamber 36 inside the cavity assembly 34, and a mounting bracket 52 for mounting the drive motor 60 is provided outside the side wall 49 of the cavity assembly 34. Is installed. The outer side of the mounting bracket 52 is provided with a drive motor 60 for providing a driving force for rotating to the tray 38, the drive motor 60 is provided with a rotating shaft 62 for transmitting the rotational force. Is coupled to the rotation shaft 62 is provided with a transmission shaft 72 for transmitting a rotational force to the tray 38, the inside of the transmission shaft 72 is formed with a hollow portion 76 is open at one side of the rotation shaft ( 62) is inserted. A locking jaw 80 protruding to extend concentrically with the central axis of the transmission shaft 72 is formed at one side of the outer circumferential surface of the side in which the hollow portion 76 is opened in the transmission shaft 72. A coupling portion 82 protruding to extend concentrically with the central axis of the transmission shaft 72 is formed on the opposite side of the transmission shaft 72 where the locking step 80 is formed. The outer side of the coupling portion 82 is provided with a cover portion 86 made of silicone rubber.

Microwave oven, tray, drive motor, transmission shaft,

Description

A motor shaft mounting structure for microwave oven

Figure 1 is a side cross-sectional view showing a shaft installation structure of a drive motor for a microwave oven according to the prior art.

Figure 2 is a side cross-sectional view of a microwave oven showing a preferred embodiment of the shaft mounting structure of the drive motor for a microwave oven according to the present invention.

3 is a cross-sectional view taken along the line AA ′ of FIG. 3.

Figure 4a is a front and side cross-sectional view showing the structure of the transmission shaft constituting an embodiment of the present invention.

Figure 4b is a front view and a side cross-sectional view showing the structure of the cover portion constituting an embodiment of the present invention.

Figure 4c is a front and side cross-sectional view showing the structure of the washer constituting an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

34: Cavity Assembly 38: Tray

40: roller 42: lathe

50: through hole 52: mounting bracket

56: rotating shaft ball 58: coupling hole

60: drive motor 62: rotating shaft

66: flange 68: fastening hole

72: transmission shaft 74: body

76: hollow 80: stiffened jaw

82: coupling portion 86: cover portion

88: torso 90: stepped portion

92: connecting portion 94: vertical portion

96: home 98: washer

100: through

The present invention relates to a microwave oven, and more particularly to a shaft mounting structure of a drive motor that provides a driving force for rotating the turntable on which food is placed.

Figure 1 is a side cross-sectional view showing the shaft mounting structure of the drive motor for a microwave oven according to the prior art.

As shown in the drawing, the tray 6 is installed in the cooking chamber 4 provided in the cavity assembly 2 of the microwave oven. Food is placed on the upper surface of the tray 6 and cooked by microwaves oscillated by a magnetron (not shown). Of course, the food is also heated by a heater (not shown) installed on one side of the cavity assembly 2.

The heater not only applies radiant heat to the food, but also heats the food by sweetening the bottom of the cavity assembly 2. Therefore, when the heater is installed under the bottom of the cavity assembly 2, the bottom of the cavity assembly 2 and the tray 6 may be made of a transparent material that can transmit radiant heat.

A plurality of rollers 8 are rotatably installed on the bottom of the tray 6. The roller 8 supports the rotational movement of the tray 6 while contacting the upper surface of the plate portion 12 when the tray 6 rotates on the plate portion 12 of the shelf 10 to be described below. Configured to do so.

The rollers 8 are arranged circumferentially to support the rotation of the tray 6. The roller 8 may be provided with a plurality, at least three or more.

Under the tray 6 is provided a shelf 10 for rotatably supporting the tray 6. The shelf 10 includes a plate portion 12 in which the tray 6 is seated on an upper surface thereof, and a plurality of leg portions spaced apart from the bottom surface of the cavity assembly 2 by a predetermined height. It consists of 14. The shelf 10 serves to allow the tray 6 to be positioned at a predetermined height in the cavity assembly 2.

The shelf 10 is designed such that the edge of the bottom surface of the tray 6 can face the outer circumferential surface of the transmission shaft 26 to be described below, and the plate portion 12 has a roller of the tray 6. The rail 18 which guides the movement of 8 is formed. The rail 18 is formed in a circular shape along the rotational track of the roller 8.

The through hole 20 is provided on the side wall of the cavity assembly 2. The through hole 20 is positioned slightly lower than the height at which the tray 6 is located. The through hole 20 is installed to penetrate the rotating shaft 24 of the driving motor 22 to be described below.

On the outer wall of the cavity assembly 2, a drive motor 22 is provided which provides a driving force for the tray 6 to rotate. The drive motor 22 is provided with a rotating shaft 24 for transmitting a rotational force, the rotating shaft 24 is installed through the through hole 20. The transmission shaft 26 is installed at the tip of the rotation shaft 24.

The transmission shaft 26 is formed in a hollow cylindrical shape, the rotating shaft 24 is coupled to the inside of the transmission shaft 26. The outer circumferential surface of the transmission shaft 26 is installed to be in close contact with the bottom surface of the tray (6). Therefore, the outer peripheral surface of the transmission shaft 26 is in close contact with one side of the bottom surface of the tray 6, the power of the drive motor 22 is transmitted to the transmission shaft 26 along the rotation shaft 24. The driving force transmitted to the transmission shaft 26 is transmitted to the tray 6 so that the tray 6 rotates.

However, the shaft mounting structure of the drive motor for a microwave oven according to the prior art as described above has the following problems.

That is, when the drive motor 22 is mounted on the side wall and the tray 6 is rotated, the delivery shaft 26 coupled to the rotation shaft 24 of the drive motor 22 is placed on the tray 6. There is a problem that cooking is not made stably due to sagging or stripping by weight.

Accordingly, the present invention is to solve the problems of the prior art as described above, an object of the present invention is to provide a shaft installation structure of the drive motor for a microwave oven does not sag or remove the transmission shaft coupled to the rotary shaft of the drive motor. It is.

According to a feature of the present invention for achieving the above object, the present invention is a food assembly is seated on the upper surface inside the cooking chamber of the cavity assembly, provided with a rotatable roller on the bottom, rotatably installed; A shelf supporting the tray to be positioned at a predetermined position; A drive motor installed on a side wall of the cavity assembly and provided with a rotation shaft on one side to provide power to the tray to be rotatable; Is installed through the through hole formed in the side wall of the cavity assembly to transfer the driving force to the tray, the body portion is coupled to the rotating shaft, radially extending from the body portion, is supported on the outer surface of the cavity assembly side wall A catching jaw is formed, and the catching jaw is configured to include a transmission shaft to be caught on the side wall.

In the transmission shaft, a coupling portion protruding outward is formed on a corresponding side of the portion in which the locking step is installed in the body portion, and the cover portion is further provided to surround the exterior of the coupling portion.

Preferably, the coupling part and the cover part are provided with gear parts to be coupled to each other.

One side of the coupling portion in the transmission shaft is preferably provided with a groove is coupled to the washer provided so that the cover portion is not removed.

It is preferable that any one of the hollow portion of the transmission shaft and the rotation shaft of the drive motor is formed with a protruding protrusion, and the other side is formed with at least one groove corresponding to the protrusion.

The protrusion may have a T-shaped protrusion, and the groove may have a T-shaped groove corresponding to the T-shaped protrusion.

According to the shaft mounting structure of the drive motor for a microwave oven according to the present invention having such a configuration, the transmission shaft coupled to the rotary shaft of the drive motor is supported on the outer wall of the cavity assembly so that the transmission shaft is struck or removed even if the tray load is applied. The phenomenon is prevented, the operation of the tray is stable, there is an effect that the cooking is stable.

Hereinafter, a preferred embodiment of the shaft installation structure of the drive motor for a microwave oven according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a side cross-sectional view of a microwave oven showing a preferred embodiment of the shaft mounting structure of the drive motor for a microwave oven according to the present invention, Figure 3 is a cross-sectional view taken along line AA 'of Figure 3, 4a is a front view and a side cross-sectional view showing the structure of the transmission shaft constituting an embodiment of the present invention, Figure 4b is a front view and a side cross-sectional view showing the structure of the cover portion constituting an embodiment of the present invention, Figure 4c shows a front view and a side cross-sectional view showing the structure of the washers constituting an embodiment of the present invention.

As shown in these figures, the exterior of the microwave oven body 30 is provided with an outer case 32 to shield the inside of the microwave oven body 30 from the outside. The cooking chamber 36 is provided inside the cavity assembly 34 constituting the frame of the microwave oven body 30. The cooking chamber 36 is a place where food is cooked by microwave or heater heat. A door (not shown) for selectively opening and closing the cooking compartment 36 is installed on the front surface of the microwave oven body 30.

A control panel (not shown) indicating an operation and a driving state for driving the microwave oven body 30 is installed at an upper end of the front surface of the microwave oven body 30 corresponding to the upper portion of the door.

The tray 38 is installed in the cooking chamber 36 provided in the cavity assembly 34. The tray 38 is formed in a circular plate shape, and food is placed on the upper surface of the tray 38 to be cooked.

A plurality of rollers 40 are rotatably installed on the bottom of the tray 38. The roller 40, when the tray 38 rotates on the plate portion 44 of the shelf 42, which will be described below, makes contact with the upper surface of the plate portion 44 to perform the rotational movement of the tray 38. It is configured to support it.

The roller 40 is arranged circumferentially to support the rotation of the tray 38. The roller 40 may be provided with a plurality, for example three should be provided. The rollers 40 are preferably arranged at an angle of 120 degrees with respect to the center of the tray 38.

Under the tray 38 is provided a shelf 42 for supporting the tray 38 to be rotatable. The shelf 42 includes a plate portion 44 on which the tray 38 is seated on an upper surface thereof, and a plurality of leg portions spaced apart from the bottom surface of the cavity assembly 34 by a predetermined height. 46). The shelf 42 serves to cause the tray 38 to be positioned at a predetermined height in the cavity assembly 34.

The shelf 42 is designed such that the edge of the bottom of the tray 38 can face the outer circumferential surface of the transmission shaft 26 to be described below, and the plate 44 has a roller of the tray 38. A rail 48 is formed to guide the movement of the 40. The rail 48 is formed in a circular shape along the rotational track of the roller 40.

The side wall 49 of the cavity assembly 34 is provided with a through hole 50. The through hole 50 is positioned slightly lower than the height at which the tray 38 is located. The through hole 50 is installed to penetrate the transmission shaft 72 to be described below.

A mounting bracket 52 for mounting the drive motor 60 to be described below is installed outside the side wall 49 of the cavity assembly 34. The mounting bracket 52 is installed outside the side wall 49 of the cavity assembly 34 in which the through hole 50 is formed, and has a plurality of through holes 56 and 58.

The through hole 56 formed at the center of the through holes 56 and 58 is the rotating shaft hole 56, and the rotating shaft 62 of the driving motor 60 passes therethrough. The rotating shaft hole 56 and the through hole 50 are provided in parallel so that the rotating shaft 62 can pass through the rotating shaft hole 56 and the through hole 50. In addition, the through hole 58 formed above and below the rotating shaft hole 56 is a coupling hole 58 for installing the drive motor 60.

On the outside of the mounting bracket 52 is installed a drive motor 60 for providing a driving force for rotating to the tray 38. The drive motor 60 is provided with a rotation shaft 62 for transmitting a rotational force, the rotation shaft 62 is installed through the rotation shaft hole 56 and the through hole 50.

As shown in FIG. 3, a T-shaped protrusion 64 is formed on the outer circumferential surface of the rotation shaft 62 along the longitudinal direction. The T-shaped protrusion 64 is inserted into a T-shaped groove 78 formed in the inner circumferential surface of the hollow portion 76 of the transmission shaft 72 to be described below, so that the rotation shaft 62 and the transmission shaft 72 are coupled to each other. Of course, the T-shaped protrusion 64 is an example, and any structure may be used as long as the structure is engaged so that power can be transmitted without turning.

The drive motor 60 is provided with a flange portion 66 extending up and down. The flange portion 66 is for mounting the drive motor 60 to the mounting bracket (52). The flange portion 66 is formed with a fastening hole 68 corresponding to the coupling hole 58 of the mounting bracket 52 to be mounted on the mounting bracket 52 substantially.

Is coupled to the rotation shaft 62 is provided with a transmission shaft 72 for transmitting a rotational force to the tray 38. Body portion 74 of the transmission shaft 72 is formed in a cylindrical shape. Inside the transmission shaft 72 is formed a hollow portion 76 with one side opened. The rotating shaft 62 is inserted into and coupled to the hollow portion 76.

T-shaped grooves 78 corresponding to the T-shaped protrusions 64 of the rotating shaft 62 are formed on the inner circumferential surface of the hollow portion 76. The protrusion 64 of the rotation shaft 62 is inserted into the groove 78 of the hollow portion 76, so that the rotation shaft 62 and the transmission shaft 72 rotate together without turning.

As shown in FIG. 4, a locking projection 80 extending radially is formed on an outer circumferential surface of the transmission shaft 72. The locking jaw 80 is formed in a circular plate shape, and is provided to have a diameter relatively larger than the inner diameter of the through hole 50. The diameter of the locking jaw 80 is larger than the inner diameter of the through hole 50, so that the locking jaw 80 of the transmission shaft 72 is caught by the side wall 49 so as not to be removed from the rotation shaft 62. This is to avoid.

A coupling portion 82 protruding to extend concentrically with the central axis of the transmission shaft 72 is formed on the opposite side of the transmission shaft 72 where the locking step 80 is formed. The coupling portion 82 has a plurality of protrusions protrude outward to form a gear portion. The diameter of the transmission shaft 72 including the coupling portion 82 is provided to have a diameter relatively smaller than the inner diameter of the through hole 50. The diameter of the coupling portion 82 is smaller than the inner diameter of the through hole 50, so that the transmission shaft 72 can be installed through the through hole 50.

The outer side of the coupling portion 82 is provided with a cover portion 86 made of silicone rubber. The cover portion 86 is formed with a cylindrical body portion 88. One side of the body portion 88 is formed with a stepped portion 90 formed stepped to narrow the inner diameter, and a connecting portion 92 connecting the body portion 88 and the stepped portion 90 is formed.

On the opposite side of the body portion 88 in which the stepped portion 90 is formed, a vertical portion 94 formed to be parallel to the connection portion 92 is formed. The stepped portion 90, the connecting portion 92, and the vertical portion 94 are formed to correspond to the shape of the transmission shaft 72 including the coupling portion 82 such that the cover portion 86 is the transmission shaft 72. It will be in close contact with and will not escape.

The inner diameter of the inner peripheral surface of the body portion 88 is the same as the diameter of the coupling portion (82). That is, the cover portion 86 is coupled to the transmission shaft 72 by mounting the coupling portion 82 inside the body portion 88 of the cover portion 86. The inner circumferential surface of the body portion 88 is formed in a shape corresponding to the outer shape of the coupling portion 82, that is, the gear portion. This is to prevent the phenomenon from being lost while the power of the transmission shaft 72 is transmitted to the cover portion 86.

A groove 96 recessed along the outer circumference of the transmission shaft 72 is formed at one side of the transmission shaft 72 separated by the thickness of the cover portion 86 from the coupling portion 82. The groove 96 is a portion to which the washer 98 for supporting the cover portion 86 installed in the coupling portion 82 is not separated. The washer 98 is formed in a ring shape.

Hereinafter, the installation process and the operation process of the shaft installation structure of the drive motor for a microwave oven according to the present invention having the configuration as described above will be described in detail.

The transmission shaft 72 is fastened through the through hole 50 of the cavity assembly 34. Particularly, while the part where the locking step 80 is formed is positioned outside of the side wall 49 of the cavity assembly 34, the locking step 80 is completely attached to the side wall 49.

The mounting bracket 52 is installed so that the through hole 50 and the rotating shaft hole 56 formed in the side wall 49 of the cavity assembly 34 coincide with each other. The mounting bracket 52 may be mounted to the outside of the side wall 49 by welding or screwing.

The rotating shaft 62 of the drive motor 60 is installed to be inserted into the hollow portion 76 of the transmission shaft 72 through the rotating shaft hole 56 of the mounting bracket 52. In particular, the rotary shaft 62 and the transmission shaft 72 are coupled by inserting and seating the T-shaped protrusion 64 of the rotation shaft 62 in the T-shaped groove 78 of the transmission shaft 72.

Then, the flange 66 of the drive motor 60 is in close contact with the mounting bracket 52 to fix the drive motor 60. At this time, after matching the fastening hole 68 of the flange portion 66 with the coupling hole 58 of the mounting bracket 52, the fastening hole 68 and the coupling hole 58 to the coupling hole 70 Tighten through.

The cover portion 86 is coupled to the coupling portion 82 of the transmission shaft 72. The coupling portion 82 of the transmission shaft 72 is inserted into the cover portion 86. In this case, the gear part of the coupling part 82 and the gear part formed inside the cover part 86 are engaged with each other. In addition, the connecting portion 92, the stepped portion 90 and the vertical portion 94 of the cover portion 86 is coupled to closely contact the appearance of the transmission shaft 72 in which the coupling portion 82 is formed.

After the cover part 86 is installed in the coupling part 82, a washer 98 is installed in the groove 96 of the transmission shaft 72. After the transmission shaft 72 is completely installed according to the above-described process, the shelf 42 is installed. The tray 38 is provided on the upper surface of the plate-shaped portion 44 of the shelf 42. When the tray 38 is installed on the plate portion 44, the roller 40 of the tray 38 is seated on the rail 48 of the plate portion 44. Then, one side of the bottom surface of the tray 38 is installed to be in close contact with the outer peripheral surface of the cover portion 86 provided on the transmission shaft 72.

When the user operates the operation unit and power is applied to the microwave oven body 30, the magnetron starts to emit microwaves or heat from the heater. The food placed on the upper surface of the tray 38 is started to be cooked by the microwaves or heat.

A portion of the power applied to the microwave oven body 30 is applied to the driving motor 60. Power applied to the drive motor 60 drives the drive motor 60. When the drive motor 60 is driven, the rotating shaft 62 of the drive motor 60 starts to rotate. When the rotation shaft 62 of the drive motor 60 is rotated, the transmission shaft 72 coupled to the rotation shaft 62 rotates.

When the transmission shaft 72 rotates, the cover portion 86 coupled with the coupling portion 82 of the transmission shaft 72 rotates. When the cover portion 86 rotates, the tray 38 in contact with the outer circumferential surface of the cover portion 86 rotates. When the tray 38 rotates, the roller 40 provided on the bottom surface of the tray 38 moves along the rail 48 of the shelf 42.

The cover portion 86 supports the tray 38 from the bottom. In other words, a portion of the load of the tray 38 is applied to the transmission shaft 72. However, the locking jaw 80 of the transmission shaft 72 is in close contact with the outer side of the side wall 49 of the cavity assembly 34 so that the transmission shaft 72 bends downward due to the load of the tray 38. Removal is prevented. In addition, the cover portion 86 of the transmission shaft 72 is prevented by the washer 98 to be removed from the coupling portion 82 by the rotation of the transmission shaft 72.

The rights of the present invention are not limited to the embodiments described above, but are defined by the rooms described in the claims, and those skilled in the art can make various modifications and adaptations within the scope of the rights described in the claims. It is self-evident.

In the shaft mounting structure of the drive motor for a microwave oven according to the present invention as described in detail above, the following effects can be expected.

That is, the transmission shaft coupled to the rotation shaft of the drive motor is supported on the outer wall of the cavity assembly to prevent the transmission shaft from falling or being removed even when the load of the tray is applied. Therefore, the operation of the tray is stable, there is an effect that the cooking is stable.

Claims (6)

A tray on which food is placed on an upper surface of the cavity assembly and a rotatable roller is provided on a lower surface of the cavity assembly to be rotatable; A shelf supporting the tray to be positioned at a predetermined position; A drive motor installed on a side wall of the cavity assembly and provided with a rotation shaft at one side thereof to provide power to the tray to be rotatable; And It is installed through the through hole formed in the side wall of the cavity assembly to transmit the driving force to the tray, and provided with a body portion coupled to the rotating shaft, extends radially from the body portion, is supported on the outer surface of the side wall of the cavity assembly Shaft installation structure of the drive motor for a microwave oven comprising a transmission shaft which is formed a locking step. The method of claim 1, The transmission shaft, the driving portion for a microwave oven, characterized in that the corresponding portion of the engaging portion is installed in the body portion is formed on the corresponding side protruding outward, the cover portion is installed to surround the outer appearance of the coupling portion Shaft mounting structure. The method of claim 2, Shaft installation structure of the drive motor for a microwave oven, characterized in that the coupling portion and the cover portion is provided with a gear portion to be engaged respectively. The method according to any one of claims 1 to 3, The shaft mounting structure of the drive motor for a microwave oven, characterized in that the groove is coupled to the washer provided so that the cover portion is not removed from the coupling portion in the transmission shaft. The method according to any one of claims 1 to 3, At least one of the hollow portion of the transmission shaft and the rotating shaft of the drive motor is a protruding protrusion is formed, the other side of the shaft installation structure for a microwave oven, characterized in that at least one groove is formed corresponding to the protrusion. The method of claim 5, The protrusion is a T-shaped protrusion is formed, the groove shaft mounting structure for a microwave oven, characterized in that the T-shaped groove portion corresponding to the T-shaped protrusion is formed.

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