KR102058033B1 - Driving device of ice making machine for refrigerator - Google Patents

Abstract

The present invention relates to an icemaker driving apparatus for a refrigerator, and more particularly, it is possible to fundamentally prevent freezing at the ice-arm connection part, thereby ensuring the stability of the icemaker operation and solving the overall problem caused by the freezing. It relates to an ice maker driving device for a refrigerator.
An icemaker driving apparatus for a refrigerator according to the present invention includes a drive housing for a refrigerator; A cam gear installed in the drive housing and rotating the tray; A cam gear driver for rotating the cam gear; And a spin gear that is operated in conjunction with the rotational motion of the cam gear and rotates the ice arm, and is rotatably installed on the spin gear so as to be engaged with the cam gear, and freezes the binding portion of the ice arm and the spin gear. It characterized in that it comprises an anti-freezing gear to release.

Description

Ice maker driving device for refrigerator {DRIVING DEVICE OF ICE MAKING MACHINE FOR REFRIGERATOR}

The present invention relates to an icemaker driving apparatus for a refrigerator, and more particularly, it is possible to fundamentally prevent freezing at the ice-arm connection part, thereby ensuring the stability of the icemaker operation and solving the overall problem caused by the freezing. It relates to an ice maker driving device for a refrigerator.

Generally, a refrigerator is provided with an ice maker, and the ice maker includes a tray device for freezing ice and a driving device for rotating the tray device to ice the ice frozen in the tray device.

In addition, the driving device rotates the ice detection arm to detect the amount of ice in the storage container together with rotating the tray device.

However, since a drive device for a conventional ice maker is mounted inside the refrigerator door, defrost occurs on the outside of the drive device due to a temperature change caused by opening and closing the refrigerator door. There are many repair requests.

In order to solve the above problems, a 'refrigerator ice maker driving apparatus' as disclosed in Korean Patent Publication No. 10-1344284 has been proposed.

The icemaker driving apparatus for a refrigerator according to the above Patent No. 10-1344284 is a cam for rotating a tray (not shown) while rotating by the driving unit 200 and the driving unit 200 as shown in FIGS. 1A and 1B. Spin gear 500 that swings the gum arm to the left and right while rotating by the gear 300, the actuating lever 400 and the actuating lever 400 organically interlocked along the cam surface for the cam gear 300, the actuating lever 400 The magnetic lever 600 for organically interlocking and outputting the ice signal or the full ice signal along the mechanical cam surface of the cam gear 300, and the driving unit 200, the cam gear 300, the operation lever 400, The case 100 includes a spin gear 500 and a magnetic lever 600.

In addition, the cam gear 300 has a cam face 330 and a cam groove 331 for an arm to be formed on a rear portion thereof, as shown in FIG. 1B, and into the storage container between the cam face 330 and the cam groove 331 for an arm. Protruding portion 332 is formed to have the upper and lower oscillating effect of the detecting arm 10 by instantaneously rotating the downwardly sensing ice arm 10.

As shown in FIG. 1B, the protrusion 332 is formed to protrude in a semicircular shape in an outward direction between the cam face 330 for the detection arm and the cam groove 331, and the operating lever (332) is mounted on the semicircular protrusion 332. Over 400, the operating lever 400 is raised and lowered momentarily, and as the operating lever 400 is raised and lowered, the spin gear 500 is instantaneously rotated upward and then rotated downward, spin gear 500 ) Can be released by the operating force generated by shaking the ice cream arm 10 up and down momentarily.

However, the icemaker driving apparatus for a refrigerator according to the above-described Patent No. 10-1344284 has a disadvantage in that the stability of the operation is deteriorated such that a large load is required during operation because the operation lever 400 must be crossed over the protrusion 332. have.

In addition, the refrigerator ice maker driving device according to the aforementioned Patent No. 10-1344284 may cause a malfunction due to wear of the protrusion 332 when used for a long time, and the operation lever 400 moves as much as the protrusion height of the protrusion 332. Since the freezing arm 10 performs the icing release of the connection part, the degree of movement of the spin gear 500 is small, which results in a lack of stability of the icing operation.

In particular, the icemaker driving apparatus for refrigerators according to the above-mentioned Patent No. 10-1344284 is not intended to prevent icing of the ice-arm connection part at all times, but to release the ice-arm 10 that has already been frozen. In order to carry out the projections 332 and the like as a suboptimal method, there was a limitation that the stability of the product could not be secured because the icing of the ice arm 10 could not be fundamentally eliminated.

Korean Patent Registration No. 10-1344284 "Ice machine driving device for refrigerator" Korean Laid-Open Patent Publication No. 10-1997-0066427 "Driver of Automatic Ice Maker" Korean Laid-Open Patent Publication No. 10-2016-0100707 "Ice Maker for Refrigerator"

The present invention has been proposed in view of the above, it is possible to fundamentally prevent the freezing of the connection part of the ice cream arm to ensure the stability of the ice maker operation and to solve the overall problem of the freezing It is an object of the present invention to provide an ice maker driving apparatus.

In order to achieve the above object, an icemaker driving device for a refrigerator according to the present invention comprises a drive housing; A cam gear installed in the drive housing and rotating the tray; A cam gear driver for rotating the cam gear; And a spin gear that is operated in conjunction with the rotational motion of the cam gear and rotates the ice arm, and is rotatably installed on the spin gear so as to be engaged with the cam gear, and freezes the binding portion of the ice arm and the spin gear. It characterized in that it comprises a freezing gear to release.

Preferably, the freezing gear is a cylindrical gear body rotatably inserted into the outer peripheral surface of the spin gear; An icing prevention gear part formed on the gear body so as to mesh with the teeth of the cam gear; And a covering portion protruding from the gear body in contact with the frost preventing gear portion.

In addition, the icemaker driving apparatus for a refrigerator according to the present invention may be configured to include an operation lever which is operated in conjunction with the cam action according to the rotation operation of the cam gear and connected to the spin gear.

According to the icemaker driving apparatus for a refrigerator according to the present invention, since the freezing operation is always performed by the anti-icing gear which is engaged with the cam gear and rotates in interlocking regardless of the rotation direction, it is possible to fundamentally prevent freezing. It is possible to secure the stability of the ice maker operation and to solve the overall problem of the ice.

In addition, according to the icemaker driving apparatus for a refrigerator according to the present invention, as the ice releasing means is composed of a frost preventing gear that is engaged by the gear connection method, the frost releasing operation is performed stably and relatively malfunction or durability due to wear There is an advantage to reduce.

1A and 1B are views for explaining a conventional icemaker driving device for a refrigerator;
2 is a partially separated perspective view for explaining the configuration of the icemaker driving apparatus for a refrigerator according to the first embodiment of the present invention.
3 is an exploded perspective view showing an icemaker driving device for a refrigerator according to a first embodiment of the present invention;
Figure 4 is an exploded perspective view showing the main part of the icemaker drive device for a refrigerator according to the first embodiment of the present invention,
5 is a plan view showing an icemaker driving device for a refrigerator according to a first embodiment of the present invention;
6 is a perspective view showing an assembled state of the icemaker driving device for a refrigerator according to the first embodiment of the present invention;
7A and 7B are views for explaining the operation of the icemaker driving apparatus for a refrigerator according to the first embodiment of the present invention.

Best Mode for Carrying Out the Invention Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, FIGS. 2 to 7B, and like reference numerals designate like elements in FIGS. 2A to 7B. Meanwhile, the drawings and detailed descriptions of configurations, operations, and effects that can be easily understood by those skilled in the art from general technology in each drawing are briefly or omitted, and are illustrated based on parts related to the present invention.

2 is a partially exploded perspective view for explaining the configuration of the icemaker driving apparatus for a refrigerator according to the first embodiment of the present invention, Figure 3 is an exploded perspective view showing the icemaker driving apparatus for a refrigerator according to the first embodiment of the present invention; 4 is an exploded perspective view showing a main portion of a refrigerator ice maker driving apparatus according to a first embodiment of the present invention, Figure 5 is a plan view showing a refrigerator ice maker driving apparatus according to a first embodiment of the present invention.

2 to 5, the icemaker driving apparatus for a refrigerator according to the first embodiment of the present invention includes a driving housing 1, a cam gear 2, a cam gear driving unit 3, an operating lever 4, and a spin. Gear 5 and the like, but characterized in that the anti-freeze gear 6 is configured to prevent the freezing of the portion of the spin gear (5) to which the detection arm 100 is connected.

The drive housing 1 includes a main housing 11 in which a cam gear 2, a cam gear driving unit 3, an operating lever 4, a spin gear 5, and the like are embedded, and the main housing 11 is sealed. The cover housing 12 is formed.

The main housing 11 and the cover housing 12 are formed in a substantially rectangular frame shape, and a plurality of binding grooves 113 and a binding hole 123 are formed to be joined to each other, and the cover housing 2 is a tray (not shown). The drive protrusion exposure hole 124 drilled so that the tray driving protrusion 22 for rotating the protrusion 22 and the spin gear exposure hole 125 through which the spin gear 5 into which the detection arm 100 is inserted are exposed. On the other hand, the reinforcement protrusion 126 protrudes in a ring shape along the circumference of the spin gear exposure hole 125.

Cam gear 2 is a component that is built in the drive housing (1) to rotate the tray, the gear portion 21, a plurality of gears formed on the outer peripheral surface of the disk-shaped body protruding in the center of the gear portion 21 And a tray driving protrusion 22 coupled to the tray. On the back surface of the cam gear 2, as shown in FIGS. 7A and 7B, the cam face 23 and the cam face 24 for the arm are formed to contact the center portion and the outer peripheral portion of the bottom of the gear portion 21, respectively. It is.

Wherein the acting arm cam groove for lowering the operating lever (4) in the direction of the actuation arm (22 in the direction of the tray driving protrusion 22 in Fig. 7a) on the acting arm cam surface 23 to rotate the sensing arm 100 downward into the storage container (not shown). 231 is formed, the magnetic cam 7 is lowered on the magnetic cam surface 24 (falling in the opposite direction of the tray driving protrusion 22) to contact the magnetic lever 7 and the hole ice 230. A magnetic cam groove 241 for separating is formed.

The cam gear driving unit 3 is a component that rotates the cam gear 2 and includes a printed circuit board 31 coupled to one side of the drive housing 1 and a step motor provided at one side of the printed circuit board 31. 32) and a Hall IC 33 provided on the other side of the printed circuit board 31. Here, the hole IC 33 outputs an ice detection or a full ice signal as the magnetic lever 7 contacts or detaches from the magnetic lever 7.

The cam gear driving unit 3 is provided with a power transmission unit 34 for reducing the rotational force generated from the step motor 32 and transmitting it to the cam gear 2.

The power transmission unit 34 includes a worm gear 342 engaged with the worm 341 (worm) coupled to the output shaft of the step motor 32, a large diameter first input gear unit 343a engaged with the worm gear 342, and Large diameter meshed with the first output gear 343b of the first reduction gear 343 and the first reduction gear 343 having the first output gear portion 343b of the small diameter formed integrally with the first input gear portion 343a. The second reduction gear 344 in which the 2nd input gear part 344a and the 2nd output gear part 344b of the small diameter formed integrally with the 2nd input gear part 344a is formed. Here, the second output gear portion 344b of the second reduction gear 344 is engaged with the cam gear 2 to transmit the reduced rotational force.

The actuating lever 4 is a component connected to the spin gear 5 which is operated in conjunction with the cam action according to the rotational motion of the cam gear 2 and is connected to the spin gear 5. Binding unit 42 is formed to be coupled to the rotation axis of the rotating shaft so as to be freely rotatable, and the spin gear binding protrusion 43 is connected to the spin gear 5 so as to be capable of power transmission. A cam moving protrusion 44 that moves along the cam face 23 for the arm 2 of the gear 2 protrudes.

The spin gear 5 is a component that is operated by the operating lever 4 interlocked with the rotational motion of the cam gear 2 and rotates the detection arm 100. The binding boss 115 formed in the main housing 11 is rotated. A rotating shaft 51 inserted into the rotating shaft 51, a cylindrical rotating rod 52 extending from the upper end of the rotating shaft 51, and formed at a boundary between the rotating shaft 51 and the rotating rod 52, and operating lever 4; A plurality of seating protrusions 53 forming a seating groove into which the spin gear binding protrusions 43 are inserted, and a first spring binding protrusion 55 into which one end of the tension spring 93 is inserted are formed. Here, the other end of the tension spring 93 whose one end is bound to the first spring binding protrusion 55 is bound to the second spring binding protrusion 117 protruding from the main housing 11.

Rotating rod 52 has a fitting shaft 54 is formed so that the fitting hole is formed in the center of the upper end of the sensing arm 100 is fitted.

On the other hand, the anti-freezing gear 6 is a component installed in the spin gear 5 to be engaged with the cam gear 2, the spin gear 5 in the spin gear exposure hole 125 of the cover housing 12 It acts to prevent freezing.

And, if the anti-freezing gear (6) is a structure that does not freeze the spin gear 5 to the cover housing 12, there is no particular limitation in the shape, but the outer peripheral surface of the spin gear (5) and the cover housing (12) In consideration of the fact that freezing phenomenon occurs between the inner peripheral surface of the spin gear exposure hole 125, the gear body 61, the anti-freezing gear portion 62 and the covering portion 63 is characterized.

The gear body 61 is rotatably inserted in the outer circumferential surface of the spin gear 5 and rotated to prevent freezing between the spin gear exposure holes 125. The cylindrical structure has a thickness that fits between the outer circumferential surface and the inner circumferential surface of the spin gear exposure hole 125.

The anti-icing gear part 62 is formed of a plurality of teeth formed along the outer circumference of the gear body 61, and is formed in an approximately center portion of the gear body 61 to be engaged with the teeth of the cam gear 2.

The covering portion 63 is a circular protrusion projecting in a washer shape to the gear body 61 in contact with the ice preventing gear portion 62, and a function of blocking the inflow of moisture, etc., and the ice preventing gear portion 62 has a cam gear ( It protrudes to a position close to the upper surface of the gear portion 61 so as to be located in the gear portion 21 of 2) to perform a function as a guide member.

On the other hand, reference numeral 7 of the figure is a magnetic lever, the central portion rotatably provided on the bottom surface of the main housing 11 and one end that is organically interlocked along the magnetic cam surface 24 of the cam gear (2), It consists of the other end provided with the magnetic 71 which is turned on / off by the Hall IC 33 (Hall IC).

The magnetic lever 7 displays the ice detection state when the magnetic 71 and the hole iris 33 maintain the contact connection state, and the ice when the magnetic 71 and the hole icy 33 deviate from the contact. Indicates the ice state of.

In addition, the rotary shaft (not shown) protruding from the center of the bottom of the cam gear 2 does not allow the operation lever 4 moving along the detection arm cam surface 23 to be inserted into the detection arm cam groove 231 when the detection arm returns. It is provided with a blocking member (8) for selectively blocking the detection arm cam groove (231).

The blocking member 8 includes a coupling part 81 rotatably coupled to the rotation shaft of the cam gear 2, and a protrusion 116 formed on one side of the coupling part 81 and formed on the bottom surface of the main housing 11. The engaging groove 82 to limit the rotation angle of the coupling portion 81 and the coupling portion 81 and the outer side of the coupling portion 81 and are supported or detached from the operating lever 4 when the cam gear is rotated forward or reverse. The support lever 83 is provided to limit the operation so that the operation lever 4 is not inserted into the cam groove 231 for the arm.

In addition, components not specifically described among the components shown in FIGS. 2 to 5 are the same as those applied to the conventional ice maker driving apparatus shown in the background and the like, and thus a detailed description thereof will be omitted.

Hereinafter, the operation of the icemaker driving device for a refrigerator according to the first embodiment of the present invention will be briefly described.

6 is a perspective view showing an assembled state of the icemaker driving apparatus for a refrigerator according to the first embodiment of the present invention, and the enlarged portion shows an enlarged portion of the indicated portion. 7A and 7B are views for explaining the operation of the icemaker driving apparatus for the refrigerator according to the first embodiment of the present invention, wherein the portion shown by the thick broken line is the cam surface 23 for the detection arm formed on the rear surface of the cam gear 2; ) And the magnetic cam surface 24 and the icing prevention gear portion 62 are not actually shown on the plane, but are markedly for clarity.

As described above, the refrigerator icemaker driving device has a function of rotating the ice-arm to detect the amount of ice in the storage container with the operation of rotating the tray device to rotate the tray device to ice the ice frozen in the tray device. Since this operation is a known operation, a detailed description thereof will be omitted and only the action of preventing freezing of the ice cube will be described in detail.

As shown in Figs. 6, 7A and 7B, when the step motor 32 is rotated in the forward and reverse directions to rotate the tray device, the worm 341, the worm gear 342, the first reduction gear 343 and the first gear are rotated. The cam gear 2 performs the forward and reverse rotation operation by the power transmission part 34 having the power transmission flow leading to the two reduction gear 344.

As described above, when the cam gear 2 is rotated, the actuating lever 4 and the magnetic lever 7 perform a predetermined operation by the cam action of the cam surface 23 and the magnetic cam surface 24 for the arm formed on the bottom surface thereof. At the same time as the device rotates, the ice preventing gear 6 engaged with the gear portion 21 of the cam gear 2 is rotated to perform the ice freezing operation.

More specifically, the freezing operation of the ice-breaking arm may be performed between the outer circumferential surface of the spin gear 5 and the spin gear exposure hole 125 of the cover housing 12 (gap t part), or the like. When the inflow and freezing means that the spin gear 5 cannot rotate and the detection arm 100 bound thereto does not rotate, as shown in an enlarged portion of FIG. 6. When 6) is rotated, it is possible to completely block freezing of the gap t between the outer circumferential surface of the spin gear 5 and the spin gear exposure hole 125 of the cover housing 12.

For example, as shown in Fig. 7A, when the cam gear 2 is rotated clockwise in the forward direction, the anti-icing gear 6 engaged thereto is rotated in the counterclockwise direction. When the anti-icing gear 6 is rotated counterclockwise, the gear body is located between the rotary rod 52 of the spin gear 5 and the inner circumferential surface of the spin gear exposure hole 125, as shown in the enlarged portion of FIG. Since the 61 is rotated, the freezing generated due to the love flow introduced into the gap t is released.

On the contrary, when the cam gear 2 rotates in the counterclockwise direction in the reverse direction, the anti-icing gear 6 engaged thereto rotates in the clockwise direction. In this way, even when the anti-ice gear 6 is rotated in the clockwise direction, the gear body 61 located between the rotating rod 52 of the spin gear 5 and the inner circumferential surface of the spin gear exposure hole 125 is rotated so that it enters into the gap. The freezing caused by the premature sex is released.

As described above, the icemaker driving apparatus for a refrigerator according to the present invention rotates the anti-icing gear 6 regardless of the rotation direction when the cam gear 2 is rotated to perform the icing releasing operation at all times. Since it can be prevented in advance, it is possible to secure stability of the ice maker operation and to solve the overall problem caused by freezing.

Then, using the small movement of the operating lever 400 made by the protrusion 332 of the cam gear 300, as in the conventional refrigerator ice maker driving apparatus (see FIGS. 1A and 1B) as shown in the background art. (10) There is an advantage that can solve the lack of durability and stability due to malfunction or wear that may occur in the manner of performing the icing release of the connection.

What has been described above is just one embodiment for implementing the icemaker drive device for a refrigerator according to the present invention, the present invention is not limited to the above embodiment, as claimed in the following claims of the present invention Those skilled in the art to which the present invention pertains without departing from the spirit of the present invention will have the technical idea of the present invention to the extent that various changes can be made.

The terminology used in the above embodiments is only used to describe specific embodiments and is not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

1: Driving Housing
11: Main Housing
12: cover housing
2: Cam Gear
3: Cam Gear Drive
4: Operation lever
5: Spin gear
6: Freezing Gear
61: gear body
62: Freezing gear part
63: covering part
7: Magnetic lever
8: blocking member
100: gum ice

Claims (3)

In the ice maker driving device for a refrigerator,
Drive housing;
A cam gear installed in the drive housing and rotating the tray;
A cam gear driver for rotating the cam gear; And
And a spin gear operated in conjunction with the rotational motion of the cam gear to rotate the ice arm.
And a freezing prevention gear rotatably installed on the spin gear so as to be engaged with the cam gear and releasing freezing of the binding portion of the ice detection arm and the spin gear.
The method of claim 1,
The freezing prevention gear,
A cylindrical gear body rotatably inserted into an outer circumferential surface of the spin gear;
An icing prevention gear part formed on the gear body to be engaged with the tooth gear of the cam gear; And
And a covering part protruding from the gear body in contact with the anti-icing gear part.
The method according to claim 1 or 2,
And an actuating lever connected to the spin gear, the actuating lever being interlocked with the cam action according to the rotational motion of the cam gear.

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