KR20140051633A - Device for opening and closing door of ice drawing port for refrigerator - Google Patents

Device for opening and closing door of ice drawing port for refrigerator Download PDF

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Publication number
KR20140051633A
KR20140051633A KR1020120117896A KR20120117896A KR20140051633A KR 20140051633 A KR20140051633 A KR 20140051633A KR 1020120117896 A KR1020120117896 A KR 1020120117896A KR 20120117896 A KR20120117896 A KR 20120117896A KR 20140051633 A KR20140051633 A KR 20140051633A
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KR
South Korea
Prior art keywords
gear
opening
electric motor
ice
worm gear
Prior art date
Application number
KR1020120117896A
Other languages
Korean (ko)
Inventor
양강주
Original Assignee
주식회사 에스 씨디
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Publication date
Application filed by 주식회사 에스 씨디 filed Critical 주식회사 에스 씨디
Priority to KR1020120117896A priority Critical patent/KR20140051633A/en
Publication of KR20140051633A publication Critical patent/KR20140051633A/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/039—Gearboxes for accommodating worm gears
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25C—PRODUCING, WORKING OR HANDLING ICE
    • F25C5/00—Working or handling ice
    • F25C5/20—Distributing ice
    • F25C5/22—Distributing ice particularly adapted for household refrigerators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/028—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00—General constructional features
    • F25D23/02—Doors; Covers
    • F25D23/04—Doors; Covers with special compartments, e.g. butter conditioners

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Refrigerator Housings (AREA)

Abstract

The door opening and closing device of the present invention includes an electric motor that is built in the upper and lower cases and rotates forward and reverse, a worm gear mounted on a drive shaft of the electric motor, A second gear disposed on the other side of the worm gear and meshing with a lower gear of the second gear, a second gear disposed on the other side of the worm gear, And a ring spring which is in close contact with the inner side of the upper gear of the second gear and has both ends bent into a protrusion.
Accordingly, the present invention uses an electric motor with a small thickness and arranges gears on the right and left sides of the electric motor to reduce the volume of the door for opening and closing the door of the ice outlet port, thereby reducing the volume of the dispenser device of the refrigerator.
Further, according to the present invention, a two-step spur gear, which is a motor protection device, is engaged with a lower gear of a second gear so that when the electric motor is overloaded, the power of the electric motor is not transmitted to the output gear, It is effective.
Further, according to the present invention, a shaft is inserted into a groove formed in a worm gear, and a protruding portion of the shaft is seated in a groove formed in a lower case, thereby increasing rigidity of the worm gear and preventing deformation or warping of the worm gear .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an ice-

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an ice outlet door opening / closing apparatus for a refrigerator, and more particularly, to an ice outlet door opening / closing apparatus for opening and closing an ice outlet door of an ice tank by pressing a push button to take out a certain amount of ice pieces in an ice tank of a refrigerator.

With the increasing trend of the refrigerator, a refrigerator having an ice maker has recently been released.

The refrigerator is provided with an ice maker for ice-making each ice, and an ice tank for storing ice made by the ice maker.

In addition, there is provided an ice outlet door opening / closing device capable of taking out the ice stored in the ice tank to the outside without opening the door of the refrigerator according to the user's need.

The door opening and closing device of the ice-making outlet door has a structure in which the door of the outlet of the ice-making tank is opened or closed by the electrical operation of the solenoid so that a certain amount of ice is taken out. And the rod connected to the air outlet door is rotated along the eccentric cam to open and close the door.

However, in the structure device that is opened and closed by the electrical operation of the solenoid, a magnetic field is generated due to the electric current being applied to the copper coil, so that the copper coil becomes an electromagnet and pulls the metal advance and retreat rod to attract and retreat. The withdrawal speed was very fast due to the weight of the forward / backward rod.

Therefore, there is a problem that the return spring and the metal advance and retreat rod strongly hit the iron core of the case and a considerably large hit sound is generated, thereby causing a serious unpleasant feeling to the user.

In addition, the structure in which the large eccentric cam is connected to the output shaft of the AC synchronous motor to open and close the high voltage AC power source has a risk of electric shock in the electric leakage at the ice outlet where water is always present.

In addition, since the micro switch for positioning needs to be mounted in a separate space in order to detect the position of the cam, the size of the designed parts of the micro switch must be increased. Accordingly, the position of the ice door opening / There were many.

In order to overcome this problem, Application No. 20-2002-0033405 has been developed, and FIG. 1 is a perspective view of a conventional ice outlet door opening / closing device.

Referring to FIG. 1, the design shown in Application No. 20-2002-0033405 includes a low-voltage DC electric motor 31, various reduction gear trains 32, 33 and a gear 34, The solenoid raised during the operation of the ice outlet door with the rectilinear opening and closing structure assembled with the stand 35 and the switch 36 solves the problems of the tilting and the buzzer sound as well as the risk of the high pressure safety accident.

However, the technique shown in FIG. 1 has a problem in that the number of assembled parts is too large and the structure is complicated, resulting in a large production cost.

In addition, the volume of the ice outlet door opening / closing device also increases as the number of assembled parts increases, resulting in a problem of occupying too much space in the dispenser of the refrigerator.

SUMMARY OF THE INVENTION The present invention has been conceived to solve the above-mentioned problems, and it is an object of the present invention to provide a refrigerator which can reduce the volume of a dispenser device of a refrigerator by using an electric motor with a small thickness and arranging gears on the left and right sides of the electric motor, The present invention has been made to solve the above problems.

Further, according to the present invention, a two-step spur gear, which is a motor protection device, is engaged with a lower gear of a second gear so that when the electric motor is overloaded, the power of the electric motor is not transmitted to the output gear, And an ice outlet door opening / closing device.

Further, according to the present invention, a shaft is inserted into a groove formed in a worm gear, and a protruding portion of the shaft is seated in a groove formed in a lower case, thereby increasing rigidity of the worm gear and preventing deformation or warping of the worm gear So that the door can be opened and closed easily.

According to an aspect of the present invention, there is provided an electric motor comprising: an electric motor that is built in upper and lower cases to rotate forward and reverse, a worm gear provided on a drive shaft of the electric motor, A second gear disposed on the other side of the worm gear and meshing with the lower gear of the second gear, a second gear disposed on the second gear of the second gear, And a ring spring fitted to the inside of the upper gear of the second gear and having both ends bent inward to form a protrusion.

The second gear is formed of a helical gear at the upper end and a spur gear at the lower end, and protrusions are formed on the upper surface of the spur gear so as to be sandwiched between the protrusions formed at both ends of the ring spring.

Further, the output gear includes a rod-shaped projection formed on one surface thereof so as to rise upward, and a stopper projection formed on the other surface to be inserted into a groove formed in the upper case.

The other end of the link lever is supported by a rod-like projection formed on the output gear and is rotated by the rod-shaped protrusion of the output gear of the output gear. An opening / closing door for opening / closing the ice outlet of the ice tank while rotating together with the opening / closing link upon rotation of the link lever, one end being fixed to the opening / closing link while being wound on the opening / closing link, and the other end being fixed to the outer peripheral surface of the ice outlet of the ice tank As shown in Fig.

The present invention uses an electric motor having a small thickness and arranges gears on the right and left sides of the electric motor to miniaturize the volume of the ice outlet door opening / closing device, thereby occupying less space in the dispenser device of the refrigerator.

Further, according to the present invention, a two-step spur gear, which is a motor protection device, is engaged with a lower gear of a second gear so that when the electric motor is overloaded, the power of the electric motor is not transmitted to the output gear, It is effective.

Further, according to the present invention, a shaft is inserted into a groove formed in a worm gear, and a protruding portion of the shaft is seated in a groove formed in a lower case, thereby increasing rigidity of the worm gear and preventing deformation or warping of the worm gear .

1 is a perspective view of a conventional ice outlet door opening / closing device,
FIG. 2 is a perspective view of an ice outlet door opening / closing device according to an embodiment of the present invention;
3 is an internal perspective view of a driving unit according to an embodiment of the present invention,
4 is an exploded perspective view of a driving unit according to an embodiment of the present invention,
5 is an exploded perspective view of a motor unit according to an embodiment of the present invention,
6 is an exploded perspective view of a two-stage gear according to an embodiment of the present invention,
7 is a sectional view of a second gear according to an embodiment of the present invention,
8 is a side view of a second gear according to an embodiment of the present invention,
9A is a top view of an output gear according to an embodiment of the present invention,
FIG. 9B is a bottom view of an output gear according to an embodiment of the present invention. FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings in order to facilitate a person skilled in the art to easily carry out the present invention.

FIG. 2 is a perspective view of a door opening / closing apparatus for an ice making port according to an embodiment of the present invention, FIG. 3 is an internal perspective view of a driving unit according to an embodiment of the present invention, and FIG. 4 is an exploded perspective view of a driving unit according to an embodiment of the present invention .

2 to 4, the door for opening and closing the door of the ice-making port according to the embodiment of the present invention is equipped with mechanical and electrical operating means for automatically opening and closing the door of the ice-making tank, and when the ice- And the opening and closing link is rotated while being operated to open and close the outlet door connected to the opening and closing link.

The door opening and closing apparatus of the present invention includes upper and lower cases 110 and 120 which are separated into upper and lower parts, a DC electric motor 131 located inside the upper and lower cases 110 and 120, A second gear 140 disposed inside the upper and lower cases 110 and 120 so as to engage with one side of the worm gear 133 and a lower gear 140 disposed on the other side of the worm gear 133, A two-step spur gear 150 provided to engage with the gear, a fan-shaped output gear 160 which is installed to engage with the two-step spur gear 150 to rotate forward and reverse, A link lever 201 which is provided on the opening and closing link 200 and the other end is supported by a rod-like projection 161 formed on the output gear 160, And is rotated together with the open / close link 200 when the link lever 201 is rotated, An outlet door 220 for opening and closing the ice outlet, a coil spring 230 fixed to the opening / closing link 200 at one end in a state of being wound on the opening / closing link 200 and the other end fixed to the outer circumferential surface of the ice outlet of the ice tank do.

5 to 9B, the components provided in the driving unit of the door for opening and closing the door of the ice making port will be described in detail.

5 is an exploded perspective view of a motor unit according to an embodiment of the present invention.

5, the motor unit includes a DC electric motor 131 and a worm gear 133 provided in the upper and lower cases 110 and 120. The DC electric motor 131 is provided with a worm gear 133 on a drive shaft A bearing 132 is inserted between the DC electric motor 131 and the worm gear 133 such that the frictional resistance is reduced when the DC electric motor 131 is rotated.

Then, a groove is formed in the worm gear 133 to forcibly press-fit the shaft 134 to increase the rigidity of the worm gear 133.

The shaft 134 press-fitted into the groove of the worm gear 133 protrudes from the groove of the worm gear 133 and is seated in the groove 121 formed in the lower case 101.

This can prevent the worm gear 133 from being bent or deformed by the residual stress due to friction when the DC electric motor 131 is stopped while the worm gear 133 is stably supported.

7 is a cross-sectional view of a second gear according to an embodiment of the present invention, and Fig. 8 is a side view of a second gear according to an embodiment of the present invention. Fig. 6 is a perspective view of the second gear according to the embodiment of the present invention, to be.

6 to 8, the second gear 140 is composed of the helical gear 141 and the spur gear 143, and the ring spring 142 is provided in the inner groove of the helical gear 141 located at the upper end.

At this time, the ring spring 142 has a shape in which both ends are bent inward and protrusions are formed, and the ring spring 142 can be stably provided inside the helical gear 141 due to the force to be spread out.

The spur gear 143 is engaged with the helical gear 141 provided with the ring spring 142 and the projection of the ring spring 142 is engaged with the projection 143a of the spur gear 143 Lt; / RTI >

The spur gear 142 rotates together with the rotation of the helical gear 141 that receives the power by the worm gear 131 and the spur gear 143 is rotated by the protrusions formed at both ends of the ring spring 142 Receives the power from the ring spring 142 and rotates together.

The ring spring 142 in the helical gear 141 which has been rotated together with the worm gear 133 when the DC motor 131 is restrained by the output gear 160 and overloaded by a predetermined force or more is wound around the spur gear 143 The protrusion 143a can not rotate any more and the slip phenomenon occurs in the outer periphery of the ring spring 142 and the inner groove of the helical gear 141. [

As a result, only the DC electric motor 131, the worm gear 133, and the helical gear 141 are rotated, and the ring spring 142 and the spur gear 143 do not rotate so that the power of the DC electric motor 131, The DC electric motor 131 can be protected from the overload.

FIG. 9A is a top view of an output gear according to an embodiment of the present invention, and FIG. 9B is a bottom view of an output gear according to an embodiment of the present invention.

9A and 9B, the output gear 160 is a gear configured to perform various functions. The rod-shaped protrusion 161 protruding upward from the output gear 160 is engaged with the door leaf- And a stopper protrusion 163 protruded downward is inserted into a guide groove formed in the upper case 110 so as to move along the guide groove and stop This is to prevent the link lever 201 from rotating more than necessary when the link lever 201 reciprocates within a predetermined angle, that is, within a 50 占 angle required for door opening and closing.

The output gear 160 is assembled such that the rod-shaped protrusion 161 is located inside the link lever 201 of the opening / closing link 200 on which the coil spring 230 is wound, The self-elastic force of the wound coil spring 230 keeps the outlet door 220 closed.

At this time, when the user operates the take-out button, the output gear 161 receives the electric signal and performs normal rotation to the open position. At this time, the rod-shaped projection 161 contacts the link lever 201, And rotates.

At this time, the link lever 201 also rotates with a force stronger than the elastic force of the coil spring 230, and rotates the opening / closing link 200 to perform the opening operation to open the outlet door 220.

When the ice-making operation is completed in the open state of the outlet door 220, the output gear 160 receives the electric signal again and returns to the closed position by the reverse rotation. At this time, When the elastic return force is applied, it automatically reverses to the closed position.

At this time, the output gear 160 reversely rotates the link lever 201 to perform the closing operation in which the outlet door 220 is closed.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of illustration, It will be readily apparent that various substitutions, modifications, and alterations can be made herein.

100: driving part 110: upper case
120: lower case 121: groove
131: DC electric motor 132: Bearing
133: worm gear 134: shaft
140: second gear 141: helical gear
142: ring spring 143: spur gear
143a: projection 150: two-stage spur gear
160: Output gear 161: Bar-shaped projection
162: Through hole 163: Stopper projection
200: opening / closing link 201: link lever
220: Outlet door 230: Coil spring

Claims (4)

An electric motor built in the upper and lower cases and rotating forward and reverse;
A worm gear mounted on a drive shaft of the electric motor;
A shaft inserted into the groove formed in the worm gear so as to protrude therethrough and seated in a groove formed in the lower case;
A two-stage gear engaged with one side of the worm gear;
A two-stage spur gear installed on the other side of the worm gear and meshing with a lower gear of the second gear;
A planetary gear output gear meshing with the two-stage spur gear and rotating forward and reverse;
And a ring spring which is in close contact with the upper gear inner groove of the second gear and whose both ends are bent inward to form a projection.
2. The planetary gear set according to claim 1,
A helical gear at the top and a spur gear at the bottom,
Wherein protrusions are formed on the upper surface of the spur gear so as to be sandwiched between protrusions formed at both ends of the ring spring.
2. The output gear according to claim 1,
A bar-shaped projection formed on one surface so as to rise upward;
And a stopper protrusion formed on the other surface so as to be inserted into a groove formed in the upper case.
The method of claim 3,
A link lever which is provided at one end of the opening and closing link provided in the upper and lower cases and whose other end is supported by a rod-shaped projection formed on the output gear and is rotated by the rod-
An outlet opening provided on the opening / closing link to open / close the ice outlet of the ice tank while rotating together with the opening / closing link when the link lever is rotated;
Further comprising a coil spring having one end fixed to the opening / closing link and the other end fixed to the outer circumferential surface of the ice outlet of the ice tank, while being wound on the opening / closing link.
KR1020120117896A 2012-10-23 2012-10-23 Device for opening and closing door of ice drawing port for refrigerator KR20140051633A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020120117896A KR20140051633A (en) 2012-10-23 2012-10-23 Device for opening and closing door of ice drawing port for refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020120117896A KR20140051633A (en) 2012-10-23 2012-10-23 Device for opening and closing door of ice drawing port for refrigerator

Publications (1)

Publication Number Publication Date
KR20140051633A true KR20140051633A (en) 2014-05-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020120117896A KR20140051633A (en) 2012-10-23 2012-10-23 Device for opening and closing door of ice drawing port for refrigerator

Country Status (1)

Country Link
KR (1) KR20140051633A (en)

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