Automatic door opening device of refrigerator

Abstract

The utility model belongs to the technical field of refrigerators, and particularly relates to an automatic refrigerator door opening device which comprises a refrigerator, and a refrigerating chamber left door and a refrigerating chamber right door are hinged to one side of the refrigerator. A left door opening switch is arranged on the refrigerating chamber left door, a right door opening switch is arranged on the refrigerating chamber right door, and a door opening device is arranged on the top of the refrigerator. The motor can rotate clockwise by touching the right door opening switch on the refrigerator, the right door of the refrigerating chamber is completely opened after the worm assembly, the worm gear and other parts operate and the right variable speed driving gear drives the right push rod to be pushed forwards by a certain distance, the boss at the right push rod presses the right pressure microswitch, and the circuit of the device is disconnected and operation is stopped. After a period of time, the motor rotates reversely, and the right push rod retracts; the opening and closing principle of the left-opening door on the touch refrigerator is consistent with the above.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of refrigerator, specifically is refrigerator automatic door opening device. BACKGROUND

[0002] The refrigerator is a kind of equipment that the inside temperature is reduced by refrigeration technology, to prolong the fresh-keeping period of food, and the refrigerator is mainly used for food storage and preservation.The refrigerator is various, and can be roughly divided into direct-cooling refrigerator: through refrigerant direct contact cooling, usually small, low cost;Air-cooled refrigerator: evenly distribute cold air by fan, avoid frost, good preservation effect;Double-door refrigerator: divided into refrigeration chamber and freezer, more comprehensive function.

[0003] In the existing refrigerator automatic door opening technology, there will be the following problems: for double-door refrigerator, the common door opening device adopts single door opening device to control single sash door opening, or single door opening device controls two sash doors to open.Single door opening device controls single sash door to increase the use of driving equipment, improve the complexity of control logic;And single door opening device controls the opening of two sash doors, often applied to French double-door refrigerator, two sash doors are usually the same storage box, user only needs to open one sash door, and user experience is poor.

[0004] Therefore, the utility model provides refrigerator automatic door opening device. UTILITY MODEL CONTENTS

[0005] In order to make up for the deficiencies of the prior art, solve at least one technical problem proposed in the background art.

[0006] The utility model discloses a refrigerator automatic door opening device, including the refrigerator, the one side of refrigerator is hinged with the cold storage room left door and the cold storage room right door, be provided with left door opening switch on the cold storage room left door, be provided with right door opening switch on the cold storage room right door, the top of refrigerator is provided with door opening device, the door opening device includes and the fixed mounting of refrigerator top lower housing, the top of lower housing is attached with upper housing through screw lock, the lower housing is installed with left variable speed drive gear wheel, right variable speed drive gear wheel, variable speed reversing gear, single layer gear, two stage reduction gear, primary reduction gear, worm wheel through a plurality of rotating shafts respectively, the variable speed reversing gear is engaged with left variable speed drive gear wheel, right variable speed drive gear wheel, two stage reduction gear is engaged with single layer gear, primary reduction gear, the variable speed reversing gear is engaged with single layer gear, primary reduction gear is engaged with worm wheel, the fixed mounting of motor in the lower housing, the fixed mounting of worm assembly is installed to the output of motor, worm assembly is engaged with worm wheel, the sliding connection of left push rod and right push rod is established in the lower housing, left push rod and left variable speed drive gear wheel cooperate, right push rod and right variable speed drive gear wheel cooperate, left microswitch is installed in the left push rod, right microswitch is installed in the right push rod.

[0007] Further, the variable speed reversing gear is a three-layer gear structure, the three layers of the variable speed reversing gear are top teeth, middle teeth and bottom teeth, the middle teeth of the variable speed reversing gear are engaged with the single layer gear, the top teeth of the variable speed reversing gear are engaged with the left variable speed drive gear wheel, and the bottom teeth of the variable speed reversing gear are engaged with the right variable speed drive gear wheel.

[0008] Further, the top teeth and the bottom teeth of the variable speed reversing gear are variable-diameter gears, and the middle teeth are standard gears.

[0009] Further, the left variable speed drive gear wheel is a double-layer structure, and the top teeth of the left variable speed drive gear wheel and the variable speed reversing gear are all nautiloid structures.

[0010] Further, the right variable speed drive gear wheel is a double-layer structure, and the bottom teeth of the right variable speed drive gear wheel are nautiloid structures.

[0011] Further, one side of the left push rod and the right push rod close to each other is provided with a rack, the left push rod is engaged with the left variable speed drive gear wheel, and the right push rod is engaged with the right variable speed drive gear wheel.

[0012] Further, the left push rod and the right push rod are respectively fixedly installed with bosses for pressing the left microswitch and the right microswitch.

[0013] Further, one end of the left push rod away from the lower housing is fixedly installed with a left rubber end, and one end of the right push rod away from the lower housing is fixedly installed with a right rubber end.

[0014] The refrigerator automatic door opening device has the advantages that:

[0015] 1. The refrigerator automatic door opening device, by touching the right door opening switch on the top of the refrigerator, the motor can rotate clockwise, through the worm assembly, worm gear and other parts operation, the right variable speed drive gear drives the right push rod to push out a distance, the right door of the refrigerating chamber is completely opened, the boss at the right push rod presses the right pressure micro switch, the device circuit is disconnected, and the operation is stopped. After a period of time, the motor reverses, and the right push rod is retracted; the principle of touching the left door opening switch on the top of the refrigerator is the same as the above. The extension and retraction of the left push rod and the right push rod on both sides are controlled by the forward and reverse rotation of one motor, compared with the traditional single drive control of the extension / retraction of the single-sided push rod, the driving device is reduced, the cost is reduced, and the structure is simple. At the same time, one door body is pushed out in turn by one motor to open, compared with the opening mode of the single door opening device controlling two box doors, the user only needs to open one box door, and the use experience of the user is optimized. BRIEF DESCRIPTION OF DRAWINGS

[0016] The utility model will be further described in connection with the drawings.

[0017] Figure 1 It is the main view structural schematic diagram of refrigerator in the utility model;

[0018] Figure 2 It is the side view structural schematic diagram of refrigerator in the utility model;

[0019] Figure 3 It is the inside structure schematic diagram of lower shell in the utility model;

[0020] Figure 4 It is the overhead structure schematic diagram of variable speed reversing gear in the utility model;

[0021] Figure 5 It is the door opening device structure schematic diagram of left door opening state in the utility model;

[0022] Figure 6 It is the door opening device structure schematic diagram of right door opening state in the utility model;

[0023] Figure 7 It is the structure schematic diagram of two-stage reduction gear in the utility model;

[0024] Figure 8 It is the structure schematic diagram of variable speed reversing gear in the utility model;

[0025] Figure 9 It is the structure schematic diagram of worm assembly operation in the utility model;

[0026] Figure 10 It is the structure schematic diagram of worm gear operation in the utility model;

[0027] Figure 11 is the speed curve diagram of the push rod in the utility model;

[0028] Figure 12 is the push force curve diagram of the push rod in the utility model.

[0029] In the figure: 1, refrigerator; 2, cold storage room right door; 3, cold storage room left door; 4, right door opening switch; 5, left door opening switch; 6, door opening device; 7a, left rubber end head; 7b, right rubber end head; 8a, left push rod; 8b, right push rod; 9a, left variable speed drive gear; 9b, right variable speed drive gear; 10, variable speed reversing gear; 11, single layer gear; 12, two-stage reduction gear; 13, one-stage reduction gear; 14, worm wheel; 15, worm assembly; 16, motor; 17, left micro switch; 18, right micro switch; 19, upper shell; 20, lower shell. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in combination with specific embodiments.

[0031] As Figures 1 to 12 shown, the refrigerator automatic door opening device in the utility model embodiment, including the refrigerator 1, the refrigerator 1 one side is hinged with cold storage room left door 3 and cold storage room right door 2, cold storage room left door 3 is provided with left door opening switch 5, and cold storage room right door 2 is provided with right door opening switch 4, and the refrigerator 1 top is provided with door opening device 6, door opening device 6 includes and the refrigerator 1 top fixed mounting has lower shell 20, and the lower shell 20 top is attached with upper shell 19 by screw, and the lower shell 20 is installed with left variable speed drive gear 9a, right variable speed drive gear 9b, variable speed reversing gear 10, single layer gear 11, two-stage reduction gear 12, one-stage reduction gear 13, worm wheel 14 respectively through a plurality of rotating shafts in the lower shell 20, and variable speed reversing gear 10 is engaged with left variable speed drive gear 9a and right variable speed drive gear 9b, and two-stage reduction gear 12 is engaged with single layer gear 11 and one-stage reduction gear 13, and variable speed reversing gear 10 is engaged with single layer gear 11, and one-stage reduction gear 13 is engaged with worm wheel 14, and the lower shell 20 is fixedly installed with motor 16, and the output end of motor 16 is fixedly installed with worm assembly 15, and worm assembly 15 is engaged with worm wheel 14, and the lower shell 20 is slidably connected with left push rod 8a and right push rod 8b, and left push rod 8a and left variable speed drive gear 9a are matched, and right push rod 8b and right variable speed drive gear 9b are matched, and left push rod 8a is installed with left micro switch 17, and right push rod 8b is installed with right micro switch 18.

[0032] Specifically, the variable speed reversing gear 10 is a three-layer gear structure, the three layers of the variable speed reversing gear 10 are top teeth, middle teeth and bottom teeth, the middle teeth of the variable speed reversing gear 10 are engaged with the single-layer gear 11, the top teeth of the variable speed reversing gear 10 are engaged with the left variable speed drive gear 9a, and the bottom teeth of the variable speed reversing gear 10 are engaged with the right variable speed drive gear 9b. The top teeth and the bottom teeth of the variable speed reversing gear 10 are variable-diameter gears, and the middle teeth are standard gears. The left variable speed drive gear 9a is a double-layer structure, and the top teeth of the left variable speed drive gear 9a and the variable speed reversing gear 10 are both nautiloid structures. The right variable speed drive gear 9b is a double-layer structure, and the bottom teeth of the right variable speed drive gear 9b are nautiloid structures.

[0033] Specifically, the left push rod 8a and the right push rod 8b are provided with racks on the side close to each other, the left push rod 8a is engaged with the left variable speed drive gear 9a, and the right push rod 8b is engaged with the right variable speed drive gear 9b. The left push rod 8a and the right push rod 8b are respectively fixedly provided with bosses for pressing the left micro switch 17 and the right micro switch 18. The left push rod 8a is fixedly provided with the left rubber end 7a at the end away from the lower shell 20, and the right push rod 8b is fixedly provided with the right rubber end 7b at the end away from the lower shell 20.

[0034] When the door opening device 6 is in the initial state, the bosses on the left push rod 8a and the right push rod 8b press the micro switch, and the whole device is in the off state. Touching the right door opening switch 4 on the top of the refrigerator 1, the motor 16 can rotate clockwise, and after passing through the worm assembly 15, the worm gear 14, the first-stage speed reduction gear 13, the second-stage speed reduction gear 12, the single-layer gear 11, the variable speed reversing gear 10 and the like, the right variable speed drive gear 9b drives the right push rod 8b to push forward by a certain distance, and then the refrigeration chamber right door 2 is completely opened. The boss at the right push rod 8b presses the right micro switch, the device circuit is disconnected, and the operation is stopped. After a period of time, the motor 16 reverses, and the right push rod 8b is retracted; touching the left door opening switch 5 on the top of the refrigerator 1, the motor 16 can rotate counterclockwise, and after passing through the cooperation of the worm assembly 15, the worm gear 14 and the like, the left variable speed drive gear 9a drives the left push rod 8a to push forward by a certain distance, and then the refrigeration chamber left door 3 is completely opened. The boss at the left push rod 8a presses the left micro switch 17, the device circuit is disconnected, and the operation is stopped. After a period of time, the motor 16 is forward, and the left push rod 8a is retracted.

[0035] When the variable speed reversing gear 10 is forward or reverse, the left variable speed drive gear 9a and the right variable speed drive gear 9b can rotate at the same time. When the variable-diameter gears of the variable speed reversing gear 10 are engaged, the radius of the division circle of the driven gear and the driving gear is constantly changing, and the variable speed variable force requirement of the whole device is realized by changing the transmission ratio. The motor 16 is a rotary motor 16, and a direct-current brush motor 16 is selected. By reversing the polarity of the voltage applied to the terminal, the rotation switching of the motor 16 in the forward and reverse directions is realized. Figure 9 In the figure, the arrow indicates the forward rotation direction of the worm assembly 15 and the worm wheel 14. When viewed from the front end side of the worm assembly 15, if the motor 16 rotates clockwise, the rotation direction of the device is the forward rotation direction. In the figure, the arrow indicates the reverse rotation direction of the device by rotating the worm assembly 15 in the opposite direction by reversing the polarity of the voltage applied to the motor 16. The worm wheel 14 is engaged with the worm assembly 15, and the rotation force of the motor 16 can be decelerated and transmitted to the primary reduction gear 13. The primary reduction gear 13 is engaged with the worm wheel 14, the secondary reduction gear 12 is engaged with the primary reduction gear 13, and the single-layer gear 11 is engaged with the secondary reduction gear 12, thereby reducing the speed of the worm output of the worm wheel 14 and increasing the torque output of the motor 16. Figure 10 In the figure, the arrow indicates the forward rotation direction of the worm assembly 15 and the worm wheel 14. When viewed from the front end side of the worm assembly 15, if the motor 16 rotates clockwise, the rotation direction of the device is the forward rotation direction. In the figure, the arrow indicates the reverse rotation direction of the device by rotating the worm assembly 15 in the opposite direction by reversing the polarity of the voltage applied to the motor 16. The worm wheel 14 is engaged with the worm assembly 15, and the rotation force of the motor 16 can be decelerated and transmitted to the primary reduction gear 13. The primary reduction gear 13 is engaged with the worm wheel 14, the secondary reduction gear 12 is engaged with the primary reduction gear 13, and the single-layer gear 11 is engaged with the secondary reduction gear 12, thereby reducing the speed of the worm output of the worm wheel 14 and increasing the torque output of the motor 16.

[0036] The present application controls the extension and retraction of the left push rod 8a and the right push rod 8b on both sides by forward and reverse rotation of a motor 16, which is less driving device and reduces cost compared with the traditional single drive control of the extension / retraction of the single-sided push rod, and the structure is simple. At the same time, one door body is pushed out in turn by one motor 16 to open, which is compared with the opening mode of the two box doors controlled by a single door opening device 6, and the user only needs to open one box door, which optimizes the user's experience.

[0037] Working principle: touch the right door opening switch 4 on the right door 2 of the refrigeration chamber, the motor 16 starts to rotate clockwise, the worm assembly 15 assembled with it rotates in the same direction, drives the worm wheel 14, the primary reduction gear 13, the secondary reduction gear 12, the single-layer gear 11, the speed change reversing gear 10 and the right speed change drive gear 9b, and finally drives the right push rod 8b to push out, the right door 2 of the refrigeration chamber is opened. After a period of time, the motor 16 reverses, and the right push rod 8b is retracted. Touch the left door opening switch 5 on the left door 3 of the refrigeration chamber, the motor 16 starts to rotate counterclockwise, the worm assembly 15 assembled with it rotates in the same direction, drives the worm wheel 14, the primary reduction gear 13, the secondary reduction gear 12, the single-layer gear 11, the speed change reversing gear 10 and the left speed change drive gear 9a, and finally drives the left push rod 8a to push out, the left door 3 of the refrigeration chamber is opened. After a period of time, the motor 16 rotates forward, and the left push rod 8a is retracted.

[0038] The above front, rear, left, right, up and down are based on the figures in the specification Figure 1 as the standard, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0039] In the description of the utility model, it is understood that the terms "center", "longitudinal", "transverse", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the scope of protection of the utility model.

[0040] The basic principle, main features and advantages of the utility model are shown and described above. Those skilled in the art should understand that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. A refrigerator automatic door opening device, comprising a refrigerator (1), a left door (3) and a right door (2) of a refrigerating chamber are hinged on one side of the refrigerator (1); characterized in that: The left door (3) of the refrigeration chamber is provided with a left door opening switch (5), the right door (2) of the refrigeration chamber is provided with a right door opening switch (4), and the top of the refrigerator (1) is provided with a door opening device (6); The door opening device (6) comprises a lower shell (20) fixedly installed on the top of the refrigerator (1), the top of the lower shell (20) is locked with an upper shell (19) through screws, a left variable speed drive gear (9a), a right variable speed drive gear (9b), a variable speed reversing gear (10), a single layer gear (11), a two-stage reduction gear (12), a one-stage reduction gear (13) and a worm gear (14) are respectively installed in the lower shell (20) through a plurality of rotating shafts, the variable speed reversing gear (10) is engaged with the left variable speed drive gear (9a) and the right variable speed drive gear (9b), the two-stage reduction gear (12) is engaged with the single layer gear (11) and the one-stage reduction gear (13), the variable speed reversing gear (10) is engaged with the single layer gear (11), the one-stage reduction gear (13) is engaged with the worm gear (14), a motor (16) is fixedly installed in the lower shell (20), a worm assembly (15) is fixedly installed at the output end of the motor (16), the worm assembly (15) is engaged with the worm gear (14), and the left push rod (8a) and the right push rod (8b) are slidably connected in the lower shell (20). The left push rod (8a) is matched with the left variable speed drive gear (9a), and the right push rod (8b) is matched with the right variable speed drive gear (9b). The left push rod (8a) is provided with a left micro switch (17), and the right push rod (8b) is provided with a right micro switch (18).

2. The automatic door opening device of the refrigerator according to claim 1, characterized in that: The variable speed reversing gear (10) is a three-layer gear structure, the three layers of the variable speed reversing gear (10) are top teeth, middle teeth and bottom teeth, the middle teeth of the variable speed reversing gear (10) are engaged with the single layer gear (11), the top teeth of the variable speed reversing gear (10) are engaged with the left variable speed drive gear (9a), and the bottom teeth of the variable speed reversing gear (10) are engaged with the right variable speed drive gear (9b). 3.The automatic door opening device of a refrigerator according to claim 1, characterized in that: The top teeth and the bottom teeth of the variable speed reversing gear (10) are variable diameter gears, and the middle teeth are standard gears.

4. The automatic door opening device of the refrigerator according to claim 1, characterized in that: The left variable speed drive gear (9a) is a double-layer structure, and the top teeth of the left variable speed drive gear (9a) and the variable speed reversing gear (10) are both nautiloid structures. 5.The automatic door opening device of a refrigerator according to claim 4, characterized in that: The right variable speed drive gear (9b) is a double-layer structure, and the bottom teeth of the right variable speed drive gear (9b) are nautiloid structures. 6.The automatic door opening device of a refrigerator according to claim 1, characterized in that: The left push rod (8a) and the right push rod (8b) are provided with a rack on the side close to each other, the left push rod (8a) is engaged with the left variable speed drive gear (9a), and the right push rod (8b) is engaged with the right variable speed drive gear (9b). 7.The automatic door opening device of a refrigerator according to claim 1, characterized in that: The left push rod (8a) and the right push rod (8b) are respectively fixedly installed with bosses for pressing the left micro switch (17) and the right micro switch (18). 8.The automatic door opening device of a refrigerator according to claim 1, characterized in that: The left push rod (8a) is fixedly installed with a left rubber end head (7a) at one end away from the lower shell (20), and the right push rod (8b) is fixedly installed with a right rubber end head (7b) at one end away from the lower shell (20).

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