Automatic door opening device of refrigerator

Abstract

The invention belongs to the technical field of refrigerators, and particularly relates to a refrigerator automatic door opening device which comprises a refrigerator, and a refrigerating chamber right door and a refrigerating chamber left 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, after the worm assembly, the worm gear and other parts run, the right variable speed driving gear drives the right push rod to be pushed forwards by a certain distance, the right door of the refrigerating chamber is completely opened, the boss at the position of the right push rod presses the right pressure microswitch, the circuit of the device is disconnected, and running is stopped.

Description

Technical Field

[0001] The invention belongs to the technical field of refrigerators, in particular to an automatic door opening device for a refrigerator. Background Art

[0002] A refrigerator is a device that uses refrigeration technology to lower the internal temperature, thereby extending the shelf life of food. Refrigerators are mainly used for food storage and preservation. There are many types of refrigerators, which can be roughly divided into direct cooling refrigerators: cooling through direct contact with refrigerants, usually low noise and low cost; air cooling refrigerators: using fans to evenly distribute cold air to avoid frost and have a good preservation effect; double-door refrigerators: divided into a refrigerator and a freezer, with more comprehensive functions.

[0003] The existing automatic door opening technology for refrigerators has the following problems: For double-door refrigerators, common door opening devices use a single door opening device to control the opening of a single door, or a single door opening device controls the opening of two doors at the same time. The method of controlling a single door with a single door opening device increases the use of drive equipment and the complexity of control logic; and the method of controlling the opening of two doors with a single door opening device is often used in French double-door refrigerators, where the two doors usually contain the same storage box, and users only need to open one door, which results in a poor user experience.

[0004] To this end, the present invention provides an automatic door opening device for a refrigerator. Summary of the invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is: the automatic door opening device of the refrigerator described in the present invention comprises a refrigerator, one side of which is hinged with a right door and a left door of the refrigerator; the left door of the refrigerator is provided with a left door opening switch, the right door of the refrigerator is provided with a right door opening switch, and the top of the refrigerator is provided with a door opening device; the door opening device comprises a lower shell body fixedly mounted on the top of the refrigerator, the top of the lower shell body is attached to the upper shell body by screws, and a left speed change driving gear, a right speed change driving gear, a speed change reversing gear, a single-layer gear, a secondary reduction gear, and a primary reduction gear are respectively installed in the lower shell body through a plurality of rotating shafts. , worm gear, the speed reversing gear is meshed with the left speed change drive gear and the right speed change drive gear, the secondary reduction gear is meshed with the single-layer gear and the primary reduction gear, the speed reversing gear is meshed with the single-layer gear, the primary reduction gear is meshed with the worm gear, a motor is fixedly installed in the lower shell body, a worm assembly is fixedly installed at the output end of the motor, the worm assembly is meshed with the worm gear, a left push rod and a right push rod are slidably connected in the lower shell body, the left push rod cooperates with the left speed change drive gear, and the right push rod cooperates with the right speed change drive gear; a left micro switch is installed in the left push rod, and a right micro switch is installed in the right push rod.

[0007] Furthermore, the speed change reversing gear is a three-layer gear structure, and the three layers of the speed change reversing gear are top teeth, middle teeth and bottom teeth respectively. The middle teeth of the speed change reversing gear are meshed with the single-layer gears, the top teeth of the speed change reversing gear are meshed with the left speed change drive gear, and the bottom teeth of the speed change reversing gear are meshed with the right speed change drive gear.

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

[0009] Furthermore, the left speed-changing driving gear is a double-layer structure, and the top teeth and the speed-changing reversing gear of the left speed-changing driving gear are both nautilus-type structures.

[0010] Furthermore, the right speed-changing driving gear has a double-layer structure, and the bottom teeth of the right speed-changing driving gear have a nautilus-type structure.

[0011] Furthermore, racks are provided on the sides of the left push rod and the right push rod that are close to each other, the left push rod is meshed with the left speed-changing drive gear, and the right push rod is meshed with the right speed-changing drive gear.

[0012] Furthermore, bosses for pressing the left micro switch and the right micro switch are fixedly installed in the left push rod and the right push rod respectively.

[0013] Furthermore, a left rubber end is fixedly mounted on one end of the left push rod away from the lower shell, and a right rubber end is fixedly mounted on one end of the right push rod away from the lower shell.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. The automatic door opening device of the refrigerator described in the present invention, by touching the right door opening switch on the refrigerator, the motor can rotate clockwise, and after running through the worm assembly, worm gear and other parts, the right speed drive gear drives the right push rod to push forward a distance, and then the right door of the refrigerator is fully opened. The boss at the right push rod presses the right pressure micro switch, the device circuit is disconnected, and the operation stops. 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 refrigerator is consistent with the above. The extension and retraction of the left and right push rods on both sides are controlled by the forward and reverse rotation of a motor. Compared with the traditional single drive to control the extension / retraction of the single-side push rod, the driving device is reduced, the cost is reduced, and the structure is simple. At the same time, a motor is used to push out a door body in turn to open. Compared with the single door opening device controlling the opening of two doors, the user only needs to open one door, which optimizes the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below in conjunction with the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the main structure of the refrigerator in the present invention;

[0018] Figure 2 is a schematic diagram of the side structure of the refrigerator in the present invention;

[0019] Figure 3 It is a schematic diagram of the internal structure of the lower shell in the present invention;

[0020] Figure 4 It is a schematic diagram of the top view of the speed change reversing gear in the present invention;

[0021] Figure 5 It is a schematic diagram of the structure of the door opening device in the left door opening state of the present invention;

[0022] Figure 6 It is a schematic diagram of the structure of the door opening device in the right door opening state of the present invention;

[0023] Figure 7 It is a structural schematic diagram of the secondary reduction gear in the present invention;

[0024] Figure 8 It is a structural schematic diagram of the speed change reversing gear in the present invention;

[0025] Fig. 9 It is a structural schematic diagram of the operation of the worm assembly in the present invention;

[0026] Fig.10 It is a structural schematic diagram of the worm gear operation in the present invention;

[0027] Fig.11 It is a speed curve diagram of the push rod in the present invention;

[0028] Fig.12 It is a thrust curve diagram of the push rod in the present invention.

[0029] In the figure: 1, refrigerator; 2, right door of refrigerator compartment; 3, left door of refrigerator compartment; 4, right door switch; 5, left door switch; 6, door opening device; 7a, left rubber end; 7b, right rubber end; 8a, left push rod; 8b, right push rod; 9a, left speed-changing drive gear; 9b, right speed-changing drive gear; 10, speed-changing reversing gear; 11, single-layer gear; 12, secondary reduction gear; 13, primary reduction gear; 14, worm gear; 15, worm assembly; 16, motor; 17, left micro switch; 18, right micro switch; 19, upper housing; 20, lower housing. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0031] like Figures 1 to 12 As shown, the automatic door opening device of the refrigerator according to the embodiment of the present invention comprises a refrigerator 1, wherein a right door 2 and a left door 3 of the refrigerator chamber are hingedly connected on one side of the refrigerator 1; a left door opening switch 5 is arranged on the left door 3 of the refrigerator chamber, and a right door opening switch 4 is arranged on the right door 2 of the refrigerator chamber; a door opening device 6 is arranged on the top of the refrigerator 1; the door opening device 6 comprises a lower shell 20 fixedly mounted on the top of the refrigerator 1, an upper shell 19 is attached to the top of the lower shell 20 by screws, and a left speed change driving gear 9a, a right speed change driving gear 9b are respectively mounted in the lower shell 20 through a plurality of rotating shafts. The driving gear 9b, the speed change reversing gear 10, the single-layer gear 11, the secondary reduction gear 12, the primary reduction gear 13, and the worm gear 14, the speed change reversing gear 10 is meshed with the left speed change driving gear 9a and the right speed change driving gear 9b, the secondary reduction gear 12 is meshed with the single-layer gear 11 and the primary reduction gear 13, the speed change reversing gear 10 is meshed with the single-layer gear 11, the primary reduction gear 13 is meshed with the worm gear 14, a motor 16 is fixedly installed in the lower housing 20, a worm assembly 15 is fixedly installed at the output end of the motor 16, and the worm assembly 15 is meshed with the worm gear 14 The left push rod 8a and the right push rod 8b are meshed, and the lower shell 20 is slidably connected. The left push rod 8a cooperates with the left speed change driving gear 9a, and the right push rod 8b cooperates with the right speed change driving gear 9b; the left push rod 8a is installed with a left micro switch 17, and the right push rod 8b is installed with a right micro switch 18.

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

[0033] Specifically, racks are provided on the sides of the left push rod 8a and the right push rod 8b that are close to each other. The left push rod 8a meshes with the left speed change driving gear 9a, and the right push rod 8b meshes with the right speed change driving gear 9b. Bosses for pressing the left micro switch 17 and the right micro switch 18 are fixedly installed in the left push rod 8a and the right push rod 8b, respectively. The left rubber end 7a is fixedly installed at one end of the left push rod 8a away from the lower housing 20, and the right rubber end 7b is fixedly installed at one end of the right push rod 8b away from the lower housing 20.

[0034] During operation, 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 disconnected state. Touch the right door opening switch 4 on the refrigerator 1, the motor 16 can rotate clockwise, passing through the worm assembly 15, the worm wheel 14, the first-stage reduction gear 13, the second-stage reduction gear 12, the single-layer gear 11, the speed change reversing gear 10, etc., and the right speed change driving gear 9b drives the right push rod 8b to push forward a distance, and then the right door 2 of the refrigerator compartment is fully opened, and the boss on the right push rod 8b presses the right micro switch, the device circuit is disconnected, and the operation stops. After a period of time, the motor 16 reverses and the right push rod 8b retracts; the left door opening switch 5 on the refrigerator 1 is touched, and the motor 16 can rotate counterclockwise. After the worm assembly 15, the worm wheel 14 and other parts cooperate, the left variable speed drive gear 9a drives the left push rod 8a to push forward a distance, and the left door 3 of the refrigerator compartment is fully opened. The boss at the left push rod 8a presses the left micro switch 17, and the device circuit is disconnected and stops running. After a period of time, the motor 16 rotates forward and the left push rod 8a is retracted.

[0035] When the speed change reversing gear 10 rotates forward or reverse, the left speed change driving gear 9a and the right speed change driving gear 9b can rotate at the same time. When the reducer gear of the speed change reversing gear 10 is engaged, the pitch circle radius of the driven gear and the driving gear in the meshing part is constantly changing, and the speed change and force change requirements of the whole device are achieved by changing the transmission ratio. The motor 16 is a rotary motor 16, and a DC brushed motor 16 is selected. The rotation switching between the forward direction and the reverse direction of the motor 16 is satisfied by reversing the polarity of the voltage applied to the terminal. Fig. 9 In FIG. 1 , the arrow indicates the positive 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 positive rotation direction. Fig.10 In the figure, the arrow indicates that the worm assembly 15 is rotated in the opposite direction by reversing the polarity of the voltage applied to the motor 16, and the rotation direction of the device is the reverse direction. The worm gear is meshed with the worm assembly 15, which can reduce the rotation force of the motor 16 and transmit it to the primary reduction gear 13. The primary reduction gear 13 is meshed with the worm gear, the secondary reduction gear 12 is meshed with the primary reduction gear 13, and the single-layer gear 11 is meshed 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 the forward and reverse rotation of a motor 16. Compared with the traditional single drive to control the extension / retraction of a single push rod, the application reduces the number of drive devices, reduces the cost, and has a simple structure. At the same time, a motor 16 is used to push out one door body to open one by one. Compared with the single door opening device 6 controlling the opening of two door bodies, the user only needs to open one door, which optimizes the user experience.

[0037] Working principle: Touch the right door opening switch 4 on the right door 2 of the refrigerator compartment, the motor 16 starts to rotate clockwise, and rotates in the same direction with the worm assembly 15 assembled therewith, driving the turbine, the first reduction gear 13, the second reduction gear 12, the single-layer gear 11, the speed reversing gear 10 and the right speed-changing driving gear 9b, and finally drives the right push rod 8b to be pushed out, and the right door 2 of the refrigerator compartment 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 refrigerator compartment, the motor 16 starts to rotate counterclockwise, and rotates in the same direction with the worm assembly 15 assembled therewith, driving the turbine, the first reduction gear 13, the second reduction gear 12, the single-layer gear 11, the speed reversing gear 10 and the left speed-changing driving gear 9a, and finally drives the left push rod 8a to be pushed out, and the left door 3 of the refrigerator compartment is opened. After a period of time, the motor 16 rotates forward, and the left push rod 8a is retracted.

[0038] The above-mentioned front, back, left, right, top and bottom are all based on the figures in the specification. Figure 1 As a benchmark, according to the person's observation perspective, 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 present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0040] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An automatic door opening device for a refrigerator, comprising a refrigerator (1), wherein a right door (2) and a left door (3) of a refrigerating chamber are hingedly connected on one side of the refrigerator (1); characterized in that: The left door (3) of the refrigerating chamber is provided with a left door opening switch (5), the right door (2) of the refrigerating 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 mounted on the top of the refrigerator (1); the top of the lower shell (20) is fastened with an upper shell (19) by screws; a left speed change driving gear (9a), a right speed change driving gear (9b), a speed change reversing gear (10), a single-layer gear (11), a secondary reduction gear (12), a primary reduction gear (13), and a worm gear (14) are respectively mounted in the lower shell (20) via a plurality of rotating shafts; the speed change reversing gear (10) is meshed with the left speed change driving gear (9a) and the right speed change driving gear (9b); the secondary reduction gear (12) is meshed with the single-layer gear ( 11), the first-stage reduction gear (13) is meshed, the speed change reversing gear (10) is meshed with the single-layer gear (11), the first-stage reduction gear (13) is meshed with the worm gear (14), a motor (16) is fixedly installed in the lower housing (20), a worm assembly (15) is fixedly installed at the output end of the motor (16), the worm assembly (15) is meshed with the worm gear (14), a left push rod (8a) and a right push rod (8b) are slidably connected in the lower housing (20), the left push rod (8a) and the left speed change driving gear (9a) are matched, and the right push rod (8b) and the right speed change driving gear (9b) are matched; A left micro switch (17) is installed in the left push rod (8a), and a right micro switch (18) is installed in the right push rod (8b).

2. The automatic door opening device for refrigerator according to claim 1, characterized in that: The speed change reversing gear (10) is a three-layer gear structure. The three layers of the speed change reversing gear (10) are respectively top teeth, middle teeth and bottom teeth. The middle teeth of the speed change reversing gear (10) are meshed with the single-layer gear (11). The top teeth of the speed change reversing gear (10) are meshed with the left speed change driving gear (9a). The bottom teeth of the speed change reversing gear (10) are meshed with the right speed change driving gear (9b).

3. The automatic door opening device for refrigerator according to claim 1, characterized in that: The top teeth and bottom teeth of the speed change reversing gear (10) are variable diameter gears, and the middle teeth are standard gears.

4. The automatic door opening device for refrigerator according to claim 1, characterized in that: The left speed-changing driving gear (9a) is a double-layer structure, and the top teeth of the left speed-changing driving gear (9a) and the speed-changing reversing gear (10) are both nautilus-type structures.

5. The automatic door opening device for refrigerator according to claim 4, characterized in that: The right speed-changing driving gear (9b) is a double-layer structure, and the bottom teeth of the right speed-changing driving gear (9b) are a nautilus-type structure.

6. The automatic door opening device for refrigerator according to claim 1, characterized in that: The left push rod (8a) and the right push rod (8b) are both provided with racks on the sides close to each other. The left push rod (8a) is meshed with the left speed-changing driving gear (9a), and the right push rod (8b) is meshed with the right speed-changing driving gear (9b).

7. The automatic door opening device for refrigerator according to claim 1, characterized in that: Bosses for pressing the left micro switch (17) and the right micro switch (18) are fixedly installed in the left push rod (8a) and the right push rod (8b) respectively.

8. The automatic door opening device for refrigerator according to claim 1, characterized in that: A left rubber end head (7a) is fixedly mounted on one end of the left push rod (8a) away from the lower shell (20), and a right rubber end head (7b) is fixedly mounted on one end of the right push rod (8b) away from the lower shell (20).

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