Refrigerator

Abstract

The embodiment of the utility model provides a refrigerator, and belongs to the technical field of household appliances. The refrigerator comprises a refrigerator body; a door body; the automatic door opening and closing device comprises a driving mechanism; an execution mechanism; the transmission gear train comprises a first transmission gear, a second transmission gear and a connecting gear set; the first transmission gear is in transmission connection with the driving mechanism; the second transmission gear is in transmission connection with the execution mechanism; the connecting gear set is installed on the box body in a sliding mode. The clutch mechanism comprises a clutch driving piece and a first pushing piece, and the first pushing piece is rotatably installed on the box body and connected with the clutch driving piece; the first pushing piece is in sliding connection with the connecting gear set; the clutch driving piece drives the first pushing piece to rotate relative to the box body, and the first pushing piece drives the connecting gear set to slide so that the connecting gear set can be meshed with or separated from the first transmission gear and the second transmission gear. The clutch mechanism of the refrigerator has the large maximum applicable torque, and the functional reliability of the automatic door opening and closing device is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of household appliances, and in particular to a refrigerator. Background Art

[0002] At present, in order to improve the convenience of opening and closing the door, refrigerators are usually equipped with automatic door opening and closing devices for automatically opening or closing the door. The automatic door opening and closing device generally includes a drive motor, a transmission gear train, an actuator and a clutch mechanism. The transmission gear train connects the drive mechanism motor and the actuator to form a transmission chain. The clutch mechanism is used to control the on and off state of the transmission chain.

[0003] In the related art, the clutch mechanism is arranged in the transmission gear system. The clutch mechanism usually includes a first clutch gear and a second clutch gear, the first clutch gear and the second clutch gear are coaxially arranged and abut each other, the first clutch gear is connected to the driving mechanism, and the second clutch gear is connected to the actuator. The driving mechanism can drive the first clutch gear to rotate, and there is friction between the first clutch gear and the second clutch gear. The first clutch gear can drive the second clutch gear to rotate, thereby driving the actuator to automatically open or close the door body. The clutch mechanism has a maximum applicable torque. In the process of automatically opening or closing the door body, when the door body encounters an obstacle and the reverse torque generated exceeds the maximum applicable torque, when the interaction force between the first clutch gear and the second clutch gear is greater than the friction force, the first clutch gear and the second clutch gear rotate relative to each other, so that the transmission chain is disconnected and the automatic opening or closing of the door body is stopped.

[0004] However, the maximum applicable torque of the clutch mechanism in the related art is relatively small. When the door body is too heavy or the suction force between the door body and the box body is large, the door body cannot be opened or closed automatically, reducing the functional reliability of the automatic door opening and closing device. Utility Model Content

[0005] The embodiment of the present application provides a refrigerator that can solve the technical problem that the maximum applicable torque of the clutch mechanism in the related art is small, and when the door body is too heavy or the suction force between the door body and the cabinet is large, the door body cannot be opened or closed automatically, thereby reducing the functional reliability of the automatic door opening and closing device.

[0006] In a first aspect, an embodiment of the present application provides a refrigerator, comprising:

[0007] A box body, which is constructed with a refrigeration compartment;

[0008] A door body, which is rotatably connected to the box body and is used to open or close the refrigeration compartment;

[0009] An automatic door opening and closing device, comprising:

[0010] a drive mechanism configured to provide a driving force;

[0011] an actuator, which is configured to open or close the door body under the action of the driving force;

[0012] A transmission gear train, comprising a first transmission gear, a second transmission gear and a connecting gear set; the first transmission gear is transmission-connected to the driving mechanism; the second transmission gear is transmission-connected to the actuator; the connecting gear set is slidably mounted on the box along a sliding direction, and the sliding direction is perpendicular to the height direction of the box;

[0013] A clutch mechanism comprises a clutch driving member and a first pushing member, wherein the first pushing member is rotatably mounted on the housing around a first axis and is connected to the clutch driving member, and the first axis is along the height direction of the housing; among the first pushing member and the connecting gear set, one is provided with a first sliding recess, and the other is provided with a first sliding protrusion, and the first sliding protrusion is slidably arranged in the first sliding recess; the clutch driving member drives the first pushing member to rotate around the first axis relative to the housing, and the first sliding protrusion slides in the first sliding recess to drive the connecting gear set to slide relative to the housing along the sliding direction, so that the connecting gear set is engaged with or separated from the first transmission gear and the second transmission gear.

[0014] In the refrigerator of the embodiment of the present application, in the clutch mechanism, the first pusher and the connecting gear set are slidably connected via the first sliding recess and the first sliding protrusion. When the clutch driving member drives the first pusher to rotate relative to the housing around the first axis, the first sliding protrusion slides in the first sliding recess, thereby driving the connecting gear set to slide relative to the housing along the sliding direction, so that the connecting gear set can mesh with or separate from the first transmission gear and the second transmission gear, thereby enabling the transmission chain to be in a connected state and a disconnected state. By controlling the direction in which the clutch driving member drives the first pusher to rotate, the transmission chain can be switched between the connected state and the disconnected state, thereby enabling the automatic door opening and closing device to switch between the automatic door opening and closing function and the manual door opening and closing function.

[0015] When the clutch mechanism makes the transmission chain in a connected state, if the clutch driving member does not move, the relative position between the first pusher and the connecting gear set and the housing can remain unchanged, then the relative position between the connecting gear set and the first transmission gear and the second transmission gear is always meshed, the transmission chain is always in a connected state, and the connection state of the transmission chain is only limited by the structural strength of the clutch mechanism. Compared with the related art, the clutch mechanism in the embodiment of the present application has a larger maximum applicable torque, and there is no need to increase the maximum usable torque by increasing the volume of the clutch mechanism. Even when the door body is too heavy or the suction force between the door body and the housing is large, the door body can still be opened or closed automatically, thereby improving the functional reliability of the automatic door opening and closing device.

[0016] In some embodiments of the present application, the extension trajectory of the first sliding recess is an arc, the arc bends toward the first axis, the center of the arc does not coincide with the first axis, and the distance difference between the two ends of the arc and the first axis is equal to the sliding distance of the connecting gear set relative to the box body.

[0017] With such an arrangement, during the movement of the connecting gear set relative to the housing, the first pusher can always guide the connecting gear set and limit it at both ends of the connecting gear set's moving stroke, thereby improving the accuracy of the position of the connecting gear set and further improving the functional reliability of the clutch mechanism.

[0018] In some embodiments of the present application, in the connecting gear set and the box body, one of them is provided with a second sliding recess extending along the sliding direction, and the other is provided with a second sliding protrusion, and the second sliding protrusion is slidably disposed in the second sliding recess.

[0019] In this way, by providing a second sliding protrusion and a second sliding recess between the connecting gear set and the housing, the connecting gear set can be guided, thereby improving the position accuracy of the connecting gear set and thus improving the reliability of the transmission chain in a connected or disconnected state.

[0020] In some embodiments of the present application, the second sliding recess is arranged on the housing; the connecting gear group includes a first connecting gear, a second connecting gear and a first rotating shaft, the first connecting gear is used to engage with or separate from the first transmission gear; the second connecting gear is used to engage with or separate from the second transmission gear; the first connecting gear and the second connecting gear are both mounted on the first rotating shaft, and the second sliding protrusion is formed at one end of the first rotating shaft facing the housing.

[0021] In this arrangement, since the first connecting gear and the second connecting gear can rotate around the first rotating shaft and the second sliding protrusion is formed at the end of the first rotating shaft, the rotation center and the movement center of the first connecting gear and the second connecting gear can be located on the axis of the first rotating shaft, which can improve the position accuracy of the first connecting gear and the second connecting gear, thereby improving the functional reliability of the clutch mechanism.

[0022] In some embodiments of the present application, a sliding sleeve is sleeved on one end of the first rotating shaft facing the box body, and the sliding sleeve is slidably disposed in the second sliding recess.

[0023] By configuring in this way, the sliding sleeve can reduce the wear of the end of the first rotating shaft facing the housing, thereby extending the service life of the first rotating shaft and improving the structural reliability of the connecting gear set.

[0024] In some embodiments of the present application, the first pushing member includes a rotating part and two sliding plates, the rotating part is rotatably connected to the box body around the first axis; the two sliding plates are spaced apart along the extension direction of the first axis, and the two sliding plates are respectively located on both sides of the connecting gear group.

[0025] With such arrangement, the two sliding plates can limit the connection gear set from two opposite sides on the first axis, thereby improving the stability of the connection gear set when sliding relative to the first pusher.

[0026] In some embodiments of the present application, both sliding plates are provided with the first sliding recessed portion; the connecting gear group includes a first connecting gear, a second connecting gear and a first rotating shaft, the first connecting gear is used to engage with or separate from the first transmission gear; the second connecting gear is used to engage with or separate from the second transmission gear; the first connecting gear and the second connecting gear are located between the two sliding plates, the first connecting gear and the second connecting gear are both sleeved on the first rotating shaft, and the two ends of the first rotating shaft are respectively slidably disposed in the first sliding recessed portions of the two sliding plates to form the first sliding protrusion.

[0027] With such arrangement, when the driving mechanism drives the actuator to move through the transmission gear train, the first connecting gear and the second connecting gear can rotate around the axis of the first rotating shaft. Since the first sliding protrusion is formed at the end of the first rotating shaft, the sliding center of the first connecting gear and the second connecting gear relative to the first pusher is located on the axis of the first rotating shaft. In other words, the rotation center and the sliding center of the first connecting gear and the second connecting gear are both located on the axis of the first rotating shaft, which can improve the position accuracy of the first connecting gear and the second connecting gear, thereby improving the functional reliability of the clutch mechanism.

[0028] In some embodiments of the present application, the first pushing member is provided with a second tooth structure; the clutch driving member includes a linear driving member, the linear driving member is installed on the box body, the linear driving member includes a retractable push rod, the push rod is connected to a second pushing member at one end facing the first pushing member, the second pushing member is provided with a third tooth structure, and the third tooth structure is meshed with the second tooth structure.

[0029] With such a configuration, when the push rod is extended or retracted, the second push member can be driven to move, and the second push member can drive the first push member to rotate relative to the box body through the meshing third tooth-shaped structure and the second tooth-shaped structure. By providing the second push member, during the process of assembling the push rod and the first push member, the second push member can be adjusted to adjust the position and size between the first push member and the push rod, without having to adjust the first push member and the push rod themselves, thereby improving the convenience of assembling the push rod and the first push member.

[0030] In some embodiments of the present application, the linear drive member also includes a coil, an elastic member and a limit member; the push rod is inserted into the coil, both ends of the push rod extend out of the coil, and the end of the push rod facing away from the first push member is connected to the limit member; the elastic member is sleeved on the push rod, the first end of the elastic member abuts against the coil, and the second end of the elastic member abuts against the limit member.

[0031] With such arrangement, when the coil is powered on, the push rod can move relative to the coil to drive the second push member to extend, the second push member causes the first push member to rotate relative to the housing, the first push member drives the connecting gear set to slide relative to the housing through the first sliding protrusion and the first sliding recess, so that the connecting gear set meshes with the first transmission gear and the second transmission gear. The push rod drives the limiter to move, so that the elastic member is compressed to generate a restoring force opposite to the moving direction of the push rod. When the coil is powered off, the push rod can move in the opposite direction relative to the coil under the action of the restoring force to drive the second push member to retract, the second push member causes the first push member to rotate in the opposite direction relative to the housing, the first push member drives the connecting gear set to slide in the opposite direction relative to the housing through the first sliding protrusion and the first sliding recess, so that the connecting gear set is separated from the first transmission gear and the second transmission gear.

[0032] In a second aspect, an embodiment of the present application provides a refrigerator, comprising:

[0033] A box body, which is constructed with a refrigeration compartment;

[0034] A door body, which is rotatably connected to the box body and is used to open or close the refrigeration compartment;

[0035] An automatic door opening and closing device, comprising:

[0036] a drive mechanism configured to provide a driving force;

[0037] an actuator, which is configured to open or close the door body under the action of the driving force;

[0038] A transmission gear train, comprising a first transmission gear, a second transmission gear and a connecting gear set; the first transmission gear is transmission-connected to the driving mechanism; the second transmission gear is transmission-connected to the actuator; the connecting gear set is slidably mounted on the housing;

[0039] The clutch mechanism comprises a clutch driving member and a first pushing member, wherein the first pushing member is rotatably mounted on the housing and connected to the clutch driving member; the first pushing member is slidably connected to the connecting gear set; the clutch driving member drives the first pushing member to rotate relative to the housing, and the first pushing member drives the connecting gear set to slide relative to the housing, so that the connecting gear set is engaged with or separated from the first transmission gear and the second transmission gear.

[0040] The refrigerator of the embodiment of the present application is provided with a transmission gear train as a first transmission gear, a second transmission gear and a connecting gear set, and the connecting gear set is slidably mounted on the housing; and a clutch mechanism including a clutch driving member and a first pusher is provided, and the first pusher is slidably connected with the connecting gear set. The clutch driving member can drive the pusher to rotate, and the pusher slides relative to the connecting gear set, so that the connecting gear set slides relative to the housing, so that the connecting gear set is meshed with or separated from the first transmission gear and the second transmission gear. When the connecting gear set is meshed with the first transmission gear and the second transmission gear, the transmission chain can be in a connected state, and the connection state of the transmission chain is only limited by the structural strength of the clutch mechanism. Compared with the related art, the clutch mechanism of the present application has a larger maximum applicable torque, and there is no need to increase the maximum use torque by increasing the volume of the clutch mechanism. Even when the door body is too heavy or the suction force between the door body and the housing is large, the door body can still be opened or closed automatically, thereby improving the functional reliability of the automatic door opening and closing device. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0042] Figure 1 A schematic diagram of the three-dimensional structure of a refrigerator according to an embodiment of the present application;

[0043] Figure 2 for Figure 1 The structural diagram of the automatic door opening and closing device;

[0044] Figure 3 for Figure 2 Schematic diagram of the explosion structure of the automatic door opening and closing device;

[0045] Figure 4 for Figure 2 A schematic diagram of the structure of the automatic door opening and closing device from above;

[0046] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure along the AA direction;

[0047] Figure 6 for Figure 4 A schematic diagram of the structure of the automatic door opening and closing device when the second housing is hidden and the transmission chain is in a connected state;

[0048] Figure 7 for Figure 4 A schematic diagram of the structure of the automatic door opening and closing device when the second housing is hidden and the transmission chain is in a disconnected state;

[0049] Figure 8 for Figure 7 A schematic diagram of the structure of the first pusher and the connecting gear set from a first perspective;

[0050] Fig. 9 for Figure 7 A schematic diagram of the structure of the first pusher and the connecting gear set from a second perspective;

[0051] Fig.10 for Figure 6 A schematic diagram of the structure of the clutch mechanism and the connecting gear set;

[0052] Fig.11 for Figure 4 Schematic diagram of the cross-sectional structure along the BB direction.

[0053] Reference numerals:

[0054] 100- cabinet;

[0055] 200-door body;

[0056] 300-Automatic door opening and closing device;

[0057] 400-housing;

[0058] 410-first housing; 411-first bottom plate;

[0059] 412-first side plate; 413-first sub-accommodating cavity;

[0060] 414-first connecting portion; 415-clamping recess;

[0061] 416-connecting column; 417-threaded hole;

[0062] 418 - rotating recessed portion; 419 - second sliding recessed portion;

[0063] 420 - second housing; 421 - second bottom plate;

[0064] 422 - second side plate; 423 - second sub-accommodating chamber;

[0065] 424-clamping protrusion; 425-first connecting hole;

[0066] 430-connection through hole;

[0067] 500-driving mechanism;

[0068] 510-driving motor; 520-worm;

[0069] 530-worm gear;

[0070] 600-Executing agency;

[0071] 610-connecting shaft; 611-first tooth structure;

[0072] 612-avoiding recessed portion; 613-wear-resistant washer;

[0073] 620-connecting piece; 621-second connecting hole;

[0074] 622-second connecting surface; 623-second connecting portion;

[0075] 700-transmission gear train;

[0076] 710-first transmission gear; 711-third transmission gear;

[0077] 720-second transmission gear; 721-fourth transmission gear;

[0078] 730-connecting gear set; 731-first connecting gear;

[0079] 732-second connecting gear; 733-first rotating shaft;

[0080] 734-first sliding protrusion; 735-second sliding protrusion;

[0081] 736-sliding bushing;

[0082] 800-clutch mechanism;

[0083] 810-clutch driving member; 811-push rod;

[0084] 812-coil; 813-limiting member;

[0085] 814-elastic member; 815-second pushing member;

[0086] 816-third tooth-shaped structure; 820-first pusher;

[0087] 821-first sliding recessed portion; 822-rotating portion;

[0088] 823-sliding plate; 824-second rotating shaft;

[0089] 825-Second tooth structure. DETAILED DESCRIPTION

[0090] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0091] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0092] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0093] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply 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 a limitation on the present application.

[0094] The terms "first", "second" and the like are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, features defined with "first", "second" and the like may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0095] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0096] The refrigerator in the related art has a small maximum applicable torque of the clutch mechanism. When the door body is too heavy or the suction force between the door body and the cabinet is large, the door body cannot be opened or closed automatically, which reduces the functional reliability of the automatic door opening and closing device. The inventor has tried to use a clutch mechanism with a larger maximum applicable torque, but the larger the maximum applicable torque, the larger the volume of the clutch mechanism, and the larger the installation space required. The current refrigerator, especially the built-in refrigerator, cannot meet the requirements of a larger installation space.

[0097] In view of this, the refrigerator of the embodiment of the present application is provided with a transmission gear train as a first transmission gear, a second transmission gear and a connecting gear set, and the connecting gear set is slidably mounted on the housing; and a clutch mechanism including a clutch driving member and a first pusher is provided, and the first pusher is slidably connected with the connecting gear set. The clutch driving member can drive the pusher to rotate, and the pusher slides relative to the connecting gear set, so that the connecting gear set slides relative to the housing, so that the connecting gear set is meshed with or separated from the first transmission gear and the second transmission gear. When the connecting gear set is meshed with the first transmission gear and the second transmission gear, the transmission chain can be in a connected state, and the connection state of the transmission chain is only limited by the structural strength of the clutch mechanism. Compared with the related art, the clutch mechanism of the present application has a larger maximum applicable torque, and there is no need to increase the maximum use torque by increasing the volume of the clutch mechanism. Even when the door body is too heavy or the suction force between the door body and the housing is large, the door body can still be opened or closed automatically, thereby improving the functional reliability of the automatic door opening and closing device.

[0098] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0099] refer to Figure 1, the refrigerator of the embodiment of the present application may include a box body 100 and a door body 200. The box body 100 may be configured with a refrigeration compartment. The refrigeration compartment may be used to store food and other items. Exemplarily, the number of refrigeration compartments may be one or more. The door body 200 is rotatably connected to the box body 100 for opening or closing the refrigeration compartment. The door body 200 may be rotatably connected to the outer shell 400 for opening or closing the refrigeration compartment. The number of door bodies 200 may be one or more. Exemplarily, one door body 200 may be provided corresponding to one refrigeration chamber, or two door bodies 200 may be provided corresponding to one refrigeration chamber, or one door body 200 may be provided corresponding to multiple refrigeration chambers, which will not be elaborated in the embodiment of the present application.

[0100] The refrigerator of the embodiment of the present application may further include an automatic door opening and closing device 300, which is configured to automatically open or close the door body 200, thereby improving the convenience of opening and closing the door body 200 and enhancing the user experience. Exemplarily, the number of automatic door opening and closing devices 300 may be the same as the number of door bodies 200. That is, one automatic door opening and closing device 300 may be corresponding to each door body 200. Each automatic door opening and closing device 300 may automatically open or close the door body 200 corresponding thereto.

[0101] refer to Figure 2 and Figure 3 , the automatic door opening and closing device 300 may include a driving mechanism 500, an actuator 600 and a transmission gear train 700. The driving mechanism 500 may be configured to provide a driving force. The actuator 600 is configured to open or close the door body 200 under the action of the driving force. The transmission gear train 700 may connect the driving mechanism 500 and the actuator 600 to form a transmission chain. The driving mechanism 500 may transmit the driving force to the actuator 600 through the transmission gear train 700, so that the door body 200 can be automatically opened or closed.

[0102] The automatic door opening and closing device 300 may further include a housing 400, and the housing 400 may be connected to the housing 100. For example, the housing 400 may be installed at the top of the housing 100. It is understandable that the housing 400 may also be installed at other positions of the housing 100, and the present embodiment of the application will not be repeated. The housing 400 may be configured with a receiving cavity, and at least part of the driving mechanism 500, the transmission gear train 700 and the actuator 600 may be accommodated and installed in the receiving cavity to be indirectly installed on the housing 100. By providing the housing 400, at least part of the components of the automatic door opening and closing device 300 may be arranged in the housing 400, so as to modularize the automatic door opening and closing device 300, thereby improving the convenience of assembling, installing and maintaining the automatic door opening and closing device 300. The technical solution of the embodiment of the present application is described below by taking at least part of the driving mechanism 500, the transmission gear train 700 and the actuator 600 as an example of being arranged in the housing 400.

[0103] For example, the housing 400 may be a split structure, so that the driving mechanism 500, the transmission gear train 700, the actuator 600 or other components can be installed in the housing 400. Figure 3 As shown, the housing 400 may include a first housing 410 and a second housing 420 that are detachably connected, and the first housing 410 and the second housing 420 are buckled together to form a receiving cavity.

[0104] The first housing 410 may include a first bottom plate 411 and a first side plate 412. The first side plate 412 is perpendicular to the first bottom plate 411, surrounds the first bottom plate 411, and is connected to the edge of the first bottom plate 411. The first side plate 412 and the first bottom plate 411 are arranged to form a first sub-accommodation chamber 413 having a first opening. The first bottom plate 411 may be connected to the top of the box body 100. For example, the edge of the first bottom plate 411 may be provided with a first connecting portion 414, and the first connecting portion 414 may be detachably connected to the top of the box body 100 by a connecting bolt.

[0105] The second housing 420 may include a second bottom plate 421 and a second side plate 422. The second side plate 422 is perpendicular to the second bottom plate 421, surrounds the second bottom plate 421, and is connected to the edge of the second bottom plate 421. The second side plate 422 and the second bottom plate 421 are arranged to form a second sub-accommodation cavity 423 having a second opening. When the first housing 410 and the second housing 420 are buckled together, the second opening of the second sub-accommodation cavity 423 is opposite to the first opening of the first sub-accommodation cavity 413 to form an accommodating cavity.

[0106] The first shell 410 and the second shell 420 can be detachably connected through the snap-on protrusion 424 and the snap-on recess 415. Exemplarily, at least one snap-on recess 415 can be provided on the side of the first side plate 412 facing away from the first sub-accommodating cavity 413. At least one snap-on protrusion 424 can be provided on the side of the second side plate 422 located in the second sub-accommodating cavity 423, and at least one snap-on protrusion 424 is correspondingly arranged with at least one snap-on recess 415. When the first shell 410 and the second shell 420 are buckled with each other, the snap-on protrusion 424 is snapped in the snap-on recess 415 corresponding thereto, so that the first shell 410 and the second shell 420 are connected to each other. The first shell 410 and the second shell 420 are detachably connected through the snap-on protrusion 424 and the snap-on recess 415, which can improve the convenience of connecting the first shell 410 and the second shell 420. Moreover, the snap-fitting protrusion 424 and the snap-fitting recess 415 can be formed on the first shell 410 and the second shell 420 , without the need for additional connecting parts, thereby reducing the number of parts of the automatic door opening and closing device 300 and improving the assembly efficiency of the automatic door opening and closing device 300 .

[0107] The first housing 410 and the second housing 420 may also be detachably connected by bolts. Figure 3 As shown, at least one connecting column 416 may be provided on one side of the first bottom plate 411 located in the first sub-accommodating chamber 413, and a threaded hole 417 may be provided on the side of the connecting column 416 facing away from the first bottom plate 411. The second bottom plate 421 may be provided with a first connecting hole 425. When the first shell 410 and the second shell 420 are engaged with each other, the first connecting hole 425 is opposite to the threaded hole 417. A connecting bolt may be inserted into the first connecting hole 425 and threadedly connected to the threaded hole 417 to detachably connect the first shell 410 and the second shell 420. The detachable connection through the connecting bolt can improve the connection strength between the first shell 410 and the second shell 420, and can improve the accuracy of the relative position between the first shell 410 and the second shell 420.

[0108] A driving mechanism 500 may be disposed in the housing 400, and the driving mechanism 500 is used to provide a driving force. Figure 3 As shown, the driving mechanism 500 may include a driving motor 510, which may be installed in the housing 400. The driving motor 510 has an output shaft, which may be in transmission connection with the transmission gear train 700. The driving motor 510 may provide a rotation driving force for the automatic door opening and closing device 300. It is understood that the driving motor 510 may be replaced by a pneumatic motor or a hydraulic motor, etc., which will not be described in detail in the present embodiment of the application.

[0109] The driving mechanism 500 may further include a worm 520 and a worm wheel 530. The first end of the worm 520 may be connected to the output shaft of the driving motor 510. The worm wheel 530 is rotatably mounted on the housing 400, and the worm wheel 530 is meshed with the worm 520 and connected to the transmission gear system 700. When the output shaft of the driving motor 510 rotates, the output shaft drives the worm 520 to rotate, the worm 520 drives the worm wheel 530 meshed therewith to rotate, and the worm wheel 530 drives the transmission gear system 700 and the actuator 600 to operate to open or close the door body 200. The worm 520 and the worm wheel 530 can reduce the rotation speed of the driving force provided by the driving motor 510, increase the torque of the driving force, and change the direction of the driving force to meet the driving force requirements of the actuator 600.

[0110] The driving mechanism 500 can drive the actuator 600 to automatically open or close the door body 200. Figure 3 The portion of the housing 400 facing the door body 200 may be provided with a connecting through hole 430. The connecting through hole 430 is connected to the accommodating cavity. Figure 4 and Figure 5 The actuator 600 may include a connecting shaft 610, which may be inserted into the connecting through hole 430 and rotatable in the connecting through hole 430. The portion of the connecting shaft 610 located in the accommodating cavity is in transmission connection with the transmission gear train 700. The end of the connecting shaft 610 facing the door body 200 extends out of the housing 400 and is fixedly connected to the door body 200. When the driving mechanism 500 is actuated, the connecting shaft 610 may be driven to rotate relative to the housing 400 through the transmission gear train 700, and the connecting shaft 610 may drive the door body 200 to rotate relative to the box body 100, so as to automatically open or close the door body 200.

[0111] For example Figure 5 As shown, a first toothed structure 611 may be provided on the circumferential side of the connecting shaft 610 located in the accommodating cavity, and the first toothed structure 611 may mesh with the transmission gear train 700. By providing the first toothed structure 611 meshed with the transmission gear train 700, the transmission accuracy and transmission efficiency between the transmission gear train 700 and the connecting shaft 610 may be improved, and the requirements for the driving power of the driving motor 510 may be reduced, thereby reducing the cost of the driving motor 510, and further reducing the cost of components of the automatic door opening and closing device 300.

[0112] Exemplarily, the connecting shaft 610 may be a hollow shaft. The first bottom plate 411 and the second bottom plate 421 may both be provided with a connecting through hole 430. Both ends of the connecting shaft 610 are respectively inserted into the connecting through holes 430 of the first bottom plate 411 and the second bottom plate 421. The electrical connection wires of the refrigerator may be routed inside the connecting shaft 610 to prevent the electrical connection wires from being pulled or bent and damaged or broken during the process of opening or closing the door body 200, thereby improving the electrical connection reliability of the refrigerator.

[0113] Exemplarily, an avoidance recess 612 may be provided at one end of the connecting shaft 610 facing away from the door body 200, and the avoidance recess 612 is used to accommodate the electrical connection line to prevent the electrical connection line from protruding from the end of the connecting shaft 610 and interfering with other components when the electrical connection line is routed inside the connecting shaft 610, thereby preventing other components from causing wear to the electrical connection line and increasing the service life of the electrical connection line.

[0114] A wear-resistant gasket 613 may be provided between the connecting shaft 610 and the connecting through hole 430 to reduce the wear between the connecting shaft 610 and the shell 400 during the rotation of the door body 200, thereby extending the service life of the connecting shaft 610 and the shell 400 and improving the structural reliability of the automatic door opening and closing device 300.

[0115] One end of the connecting shaft 610 facing the door body 200 may be provided with a connecting piece 620, and the connecting piece 620 is fixedly connected to the door body 200. In the process of assembling the connecting shaft 610 and the door body 200, the connecting piece 620 may be trimmed to meet the assembly requirements between the connecting shaft 610 and the door body 200, without trimming the connecting shaft 610 and the door body 200, thereby improving the convenience of assembling the connecting shaft 610 and the door body 200.

[0116] Exemplarily, a second connection hole 621 may be provided in the connecting member 620, and the second connection hole 621 may be sleeved on one end of the connecting shaft 610 facing the door body 200. At least one first connection surface may be provided on the outer side of the end of the connecting shaft 610 close to the door body 200. The hole wall of the second connection hole 621 may be provided with at least one second connection surface 622, and at least one second connection surface 622 is provided corresponding to at least one first connection surface. The second connection surface 622 contacts the corresponding first connection surface. By providing the first connection surface and the second connection surface 622, when the connecting shaft 610 drives the connecting member 620 to rotate, relative rotation between the connecting shaft 610 and the connecting member 620 can be prevented, thereby improving the rotation consistency of the connecting shaft 610 and the connecting member 620.

[0117] Exemplarily, the cross section of the circumferential side of the connecting member 620 may be non-circular, for example, a rectangular hole or a polygonal hole. The end of the door body 200 facing the connecting shaft 610 may be provided with a fixed recessed portion, which may be sleeved on the circumferential side of the connecting member 620. The orthographic projection of the fixed recessed portion at the end of the door body 200 facing the connecting shaft 610 may also be non-circular. When the connecting shaft 610 drives the door body 200 to rotate through the connecting member 620, relative rotation between the connecting member 620 and the door body 200 can be prevented, thereby improving the rotation consistency of the connecting member 620 and the door body 200.

[0118] For example, the circumferential side of the connecting piece 620 may be further provided with a second connecting portion 623, and the second connecting portion 623 may be opposite to one end of the door body 200 facing the connecting shaft 610. The second connecting portion 623 may be connected to the door body 200 by connecting bolts to further improve the connection strength between the connecting piece 620 and the door body 200, and prevent the connecting piece 620 from being separated from the door body 200.

[0119] The actuator 600 can be connected to the driving mechanism 500 via a transmission gear train 700. Figure 6 , the transmission gear train 700 may include a first transmission gear 710, a second transmission gear 720 and a connecting gear set 730. The first transmission gear 710 may be connected to the driving mechanism 500 in a transmission manner. For example, the transmission gear train 700 may also include at least one third transmission gear 711, and the first transmission gear 710 is connected to the driving mechanism 500 through at least one third transmission gear 711. Alternatively, the first transmission gear 710 may also be directly connected to the driving mechanism 500. The second transmission gear 720 may be connected to the actuator 600 in a transmission manner. For example, the transmission gear train 700 may also include at least one fourth transmission gear 721, and the second transmission gear 720 is connected to the actuator 600 through at least one fourth transmission gear 721. Alternatively, the second transmission gear 720 may also be directly connected to the execution structure. The connecting gear set 730 may be slidably mounted on the housing 100.

[0120] The automatic door opening and closing device 300 may further include a clutch mechanism 800, which is used to control the connection or disconnection of the transmission chain. Exemplarily, the clutch mechanism 800 may include a clutch driving member 810 and a first pusher 820, wherein the first pusher 820 is rotatably mounted on the housing 100 and connected to the clutch driving member 810. The first pusher 820 is slidably connected to the connecting gear set 730. The clutch driving member 810 drives the first pusher 820 to rotate relative to the housing 100, and the first pusher 820 drives the connecting gear set 730 to slide relative to the housing 100, so that the connecting gear set 730 is meshed with or separated from the first transmission gear 710 and the second transmission gear 720 system 700.

[0121] like Figure 6 As shown, the clutch driving member 810 can drive the first pusher 820 to rotate clockwise relative to the housing 400, and the first pusher 820 slides relative to the connecting gear set 730, so that the connecting gear set 730 slides in the first direction x relative to the box 100, so that the connecting gear set 730 meshes with the first transmission gear 710 and the second transmission gear 720, that is, the transmission chain is in a connected state. The driving mechanism 500 can drive the actuator 600 to operate through the transmission gear system 700 to automatically open or close the door body 200.

[0122] like Figure 7 As shown, the clutch driving member 810 can drive the first pusher 820 to rotate counterclockwise relative to the housing 400, and the first pusher 820 and the connecting gear set 730 slide in opposite directions relative to each other, so that the connecting gear set 730 slides relative to the housing 100 in a second direction -x opposite to the first direction x, so that the connecting gear set 730 is separated from the first transmission gear 710 and the second transmission gear 720, that is, the transmission chain is in a disconnected state. At this time, the door body 200 can be opened or closed manually, and the force manually applied to the door body 200 will not be transmitted to the driving mechanism 500 to prevent damage to the driving mechanism 500.

[0123] When the connecting gear set 730 is meshed with the first transmission gear 710 and the second transmission gear 720, the transmission chain can be in a connected state, and the connected state of the transmission chain is only limited by the structural strength of the clutch mechanism 800. Compared with the related art, the clutch mechanism 800 in the embodiment of the present application has a larger maximum applicable torque, and there is no need to increase the maximum use torque by increasing the volume of the clutch mechanism 800. Even when the door body 200 is too heavy or the suction force between the door body 200 and the box body 100 is large, the door body 200 can still be automatically opened or closed, thereby improving the functional reliability of the automatic door opening and closing device 300.

[0124] Exemplarily, the connecting gear set 730 may be slidably mounted on the housing 100 along the sliding direction. The first pusher 820 may be rotatably mounted on the housing 100 around the first axis S1 and connected to the clutch driving member 810. The first axis S1 may be arranged along the height direction of the housing 100. One of the first pusher 820 and the connecting gear set 730 may be provided with a first sliding recess 821, and the other may be provided with a first sliding protrusion 734, and the first sliding protrusion 734 is slidably arranged in the first sliding recess 821. When the clutch driving member 810 is in motion, the clutch driving member 810 can drive the first pusher 820 to rotate relative to the housing 100 around the first axis S1, so that the first sliding protrusion 734 slides in the first sliding recess 821, thereby driving the connecting gear set 730 to slide relative to the housing 100 along the sliding direction, thereby making the connecting gear set 730 mesh with or separate from the first transmission gear 710 and the second transmission gear 720. It should be noted that the sliding direction refers to the height direction perpendicular to the housing 100, for example Figure 6 The first direction x and Figure 7 The second direction shown is -x.

[0125] In the clutch mechanism 800 of the embodiment of the present application, the first pusher 820 and the connecting gear set 730 are slidably connected through the first sliding recess 821 and the first sliding protrusion 734. When the clutch driving member 810 drives the first pusher 820 to rotate relative to the housing 100 around the first axis S1, the first sliding protrusion 734 slides in the first sliding recess 821, thereby driving the connecting gear set 730 to slide relative to the housing 100 along the sliding direction, so that the connecting gear set 730 can be engaged with or separated from the first transmission gear 710 and the second transmission gear 720, thereby making the transmission chain in a connected state and a disconnected state. By controlling the direction in which the clutch driving member 810 drives the first pusher 820 to rotate, the transmission chain can be switched between the connected state and the disconnected state, thereby making the automatic door opening and closing device 300 switch between the automatic door opening and closing function and the manual door opening and closing function.

[0126] When the clutch mechanism 800 makes the transmission chain in a connected state, if the clutch driving member 810 does not move, the relative position between the first pusher 820 and the connecting gear set 730 and the box body 100 can be kept unchanged, and the relative position between the connecting gear set 730 and the first transmission gear 710 and the second transmission gear 720 is always meshed, and the transmission chain is always in a connected state, and the connection state of the transmission chain is only limited by the structural strength of the clutch mechanism 800. Compared with the related art, the clutch mechanism 800 in the embodiment of the present application has a larger maximum applicable torque, and there is no need to increase the maximum use torque by increasing the volume of the clutch mechanism 800. Even when the door body 200 is too heavy or the suction force between the door body 200 and the box body 100 is large, the door body 200 can still be opened or closed automatically, thereby improving the functional reliability of the automatic door opening and closing device 300.

[0127] In addition, in the process of the clutch driving member 810 driving the first pushing member 820 to drive the connecting gear group 730 to slide relative to the box body 100, the first sliding recessed portion 821 and the first sliding protrusion 734 can guide the first pushing member 820 and the connecting gear group 730, thereby improving the position accuracy of the first pushing member 820 and the connecting gear group 730, preventing the position of the connecting gear group 730 from being uncontrollable and affecting its engagement and separation with the first transmission gear 710 and the second transmission gear 720, thereby improving the reliability of the transmission chain when it is in the connected state and the disconnected state, thereby improving the functional reliability of the clutch mechanism 800.

[0128] In some possible implementations of the embodiment of the present application, the first sliding recessed portion 821 may be disposed on the connecting gear set 730 , and the first sliding protruding portion 734 may be disposed on the first pushing member 820 .

[0129] In some other possible implementations of the embodiments of the present application, refer to Figure 8 and Fig. 9 , the first sliding recessed portion 821 may be disposed on the first pusher 820, and the first sliding protruding portion 734 may be disposed on the connecting gear set 730. Exemplarily, the connecting gear set 730 may include a first connecting gear 731, a second connecting gear 732, and a first rotating shaft 733, wherein the first connecting gear 731 is used to mesh with or separate from the first transmission gear 710. The second connecting gear 732 is used to mesh with or separate from the second transmission gear 720. The first connecting gear 731 and the second connecting gear 732 are sleeved on the first rotating shaft 733. The first rotating shaft 733 is slidably mounted in the housing 400 so as to be indirectly mounted on the box body 100.

[0130] The first pusher 820 may include a rotating portion 822 and two sliding plates 823, and the rotating portion 822 may be connected to the housing 100 for rotation around the first axis S1. For example, the first bottom plate 411 of the first housing 410 and / or the second bottom plate 421 of the second housing 420 may be provided with a rotating recess 418, and the rotating portion 822 may be provided with a second rotating shaft 824, and the second rotating shaft 824 may be inserted into the rotating recess 418 and rotate in the rotating recess 418. The axis of the second rotating shaft 824 is the first axis S1. The two sliding plates 823 may be arranged at intervals along the extension direction of the first axis S1, and the two sliding plates 823 are respectively located on both sides of the connecting gear set 730. The two sliding plates 823 may limit the connecting gear set 730 from opposite sides on the first axis S1, thereby improving the stability of the connecting gear set 730 when sliding relative to the first pusher 820.

[0131] The two sliding plates 823 may be both provided with a first sliding recessed portion 821. The first connecting gear 731 and the second connecting gear 732 in the connecting gear set 730 may be located between the two sliding plates 823, and the first connecting gear 731 and the second connecting gear 732 are both sleeved on the first rotating shaft 733, and the two ends of the first rotating shaft 733 may be respectively slidably disposed in the first sliding recessed portions 821 of the two sliding plates 823 to form a first sliding protrusion 734. In the process of the driving mechanism 500 driving the actuator 600 to operate through the transmission gear train 700, the first connecting gear 731 and the second connecting gear 732 may rotate around the axis of the first rotating shaft 733. Since the first sliding protrusion 734 is formed at the end of the first rotating shaft 733, the sliding center of the first connecting gear 731 and the second connecting gear 732 relative to the first pusher 820 is located on the axis of the first rotating shaft 733. That is to say, the rotation center and sliding center of the first connecting gear 731 and the second connecting gear 732 are both located on the axis of the first rotating shaft 733, which can improve the position accuracy of the first connecting gear 731 and the second connecting gear 732, thereby improving the functional reliability of the clutch mechanism 800.

[0132] For example, reference Fig.10 , is a schematic diagram of the positions of the first pusher 820 and the connecting gear set 730 when the transmission chain is in a disconnected state. The extension track L of the first sliding recess 821 can be an arc, and the arc can be bent toward the first axis S1, and the center S2 of the arc can not coincide with the first axis S1. The distance difference between the two ends of the arc and the first axis S1 is equal to the sliding distance of the connecting gear set 730 relative to the housing 100. Fig.10 As shown, the first sliding recessed portion 821 can be an arc-shaped groove with semicircular ends. The first end of the arc can refer to the center of the semicircle located at one end of the first sliding recessed portion 821, and the second end of the arc can refer to the center of the semicircle located at the other end of the first sliding recessed portion 821. The distance between the first end of the arc and the first axis S1 is L1, and the distance between the second end of the arc and the second axis S2 is L2. The sliding distance of the connecting gear set 730 relative to the housing 100 is L3. The length difference between L2 and L1 can be equal to L3.

[0133] In the process of the clutch driving member 810 driving the first pusher 820 to rotate relative to the housing 100 around the first axis S, the distance that the first sliding protrusion 734 slides in the first sliding recess 821 is the difference between the distance between the first end of the arc L and the first axis S1 and the distance between the second end of the arc L and the first axis S1, that is, the length difference between L2 and L1. The displacement between the connecting gear set 730 and the housing 100 is L3. Since the length difference between L2 and L1 is equal to L3, in the process of the connecting gear set 730 moving relative to the housing 100, the first pusher 820 can always guide the connecting gear set 730, and limit the connecting gear set 730 at both ends of the moving stroke, thereby improving the position accuracy of the connecting gear set 730 and further improving the functional reliability of the clutch mechanism 800.

[0134] The connecting gear set 730 can be connected to the housing 100 for rotation around the first axis S1. For example, one of the connecting gear set 730 and the housing 100 can be provided with a second sliding recess 419 extending in the sliding direction, and the other can be provided with a second sliding protrusion 735, and the second sliding protrusion 735 is slidably arranged in the second sliding recess 419. By providing the second sliding protrusion 735 and the second sliding recess 419 between the connecting gear set 730 and the housing 100, the connecting gear set 730 can be guided, and the position accuracy of the connecting gear set 730 is improved, thereby improving the reliability of the transmission chain in the connected state or disconnected state.

[0135] In some possible implementations of the embodiment of the present application, the second sliding recessed portion 419 may be disposed on the connecting gear set 730 , and the second sliding protruding portion 735 may be disposed on the housing 100 .

[0136] In some other possible implementations of the present application, for example Figure 3 , Fig. 9 and Fig.11 As shown, the second sliding recess 419 can be provided on the housing 100, for example, the second sliding recess 419 can be provided on the first side plate 412 of the first housing 410 and / or the second side plate 422 of the second housing 420. The second sliding protrusion 735 can be provided on the connecting gear set 730. For example, the second sliding protrusion 735 can be formed at one end of the first rotating shaft 733 in the connecting gear set 730 facing the housing 100. Since the first connecting gear 731 and the second connecting gear 732 can rotate around the first rotating shaft 733, and the second sliding protrusion 735 is formed at the end of the first rotating shaft 733, the rotation center and the movement center of the first connecting gear 731 and the second connecting gear 732 can be located on the axis of the first rotating shaft 733, which can improve the position accuracy of the first connecting gear 731 and the second connecting gear 732, thereby improving the functional reliability of the clutch mechanism 800.

[0137] For example, the end of the first rotating shaft 733 facing the housing 100 may be sleeved with a sliding sleeve 736, and the sliding sleeve 736 is slidably disposed in the second sliding recess 419. By providing the sliding sleeve 736, the wear of the end of the first rotating shaft 733 facing the housing 100 can be reduced, the service life of the first rotating shaft 733 is extended, and the structural reliability of the connecting gear set 730 is improved.

[0138] The clutch drive member 810 is used to provide a clutch drive force. Fig.10As shown, the clutch drive member 810 may include a linear drive member, which may be installed on the housing 100, for example, the linear drive member may be installed in the housing 400. The linear drive member may include a retractable push rod 811, which provides a clutch driving force in a linear direction when the push rod 811 is retracted to drive the first push member 820 to rotate relative to the housing 100. Exemplarily, the first push member 820 may be provided with a second toothed structure 825. The second push member 815 may be connected to one end of the push rod 811 facing the first push member 820, and the second push member 815 may be provided with a third toothed structure 816, which is meshed with the second toothed structure 825. When the push rod 811 is retracted, the second push member 815 may be driven to move, and the second push member 815 may drive the first push member 820 to rotate relative to the housing 100 through the meshed third toothed structure 816 and the second toothed structure 825. By setting the second pushing member 815, during the process of assembling the push rod 811 and the first pushing member 820, the second pushing member 815 can be adjusted to adjust the position and size between the first pushing member 820 and the push rod 811, without adjusting the first pushing member 820 and the push rod 811 themselves, thereby improving the convenience of assembling the push rod 811 and the first pushing member 820.

[0139] In addition, by setting the second tooth structure 825 and the third tooth structure 816, the transmission accuracy and transmission efficiency between the first pusher 820 and the second pusher 815 can be improved, and the driving power requirements of the linear drive component can be reduced, thereby reducing the cost of the linear drive component and further reducing the component cost of the automatic opening and closing door device 300.

[0140] For example, the linear drive member may be a push-pull electromagnet. Fig.10 As shown, the linear drive member may further include a coil 812, an elastic member 814 and a stopper 813. The push rod 811 may be inserted into the coil 812, both ends of the push rod 811 extend out of the coil 812, and one end of the push rod 811 facing away from the first push member 820 may be connected to the stopper 813. The elastic member 814 is sleeved on the push rod 811, the first end of the elastic member 814 abuts against the coil 812, and the second end of the elastic member 814 abuts against the stopper 813.

[0141] like Figure 8As shown, when the coil 812 is energized, the push rod 811 can move relative to the coil 812 to drive the second push member 815 to extend, and the second push member 815 causes the first push member 820 to rotate clockwise relative to the box body 100. The first push member 820 drives the connecting gear set 730 to slide relative to the box body 100 along the first direction x through the first sliding protrusion 734 and the first sliding recess 821, so that the connecting gear set 730 is meshed with the first transmission gear 710 and the second transmission gear 720. The push rod 811 drives the limit member 813 to move, so that the elastic member 814 is compressed and generates a restoring force opposite to the moving direction of the push rod 811. Fig. 9 As shown, when the coil 812 is powered off, the push rod 811 can move in the opposite direction relative to the coil 812 under the action of the restoring force to drive the second push member 815 to retract. The second push member 815 causes the first push member 820 to rotate counterclockwise relative to the box body 100. The first push member 820 drives the connecting gear set 730 to slide along the second direction -x relative to the box body 100 through the first sliding protrusion 734 and the first sliding recess 821, so that the connecting gear set 730 is separated from the first transmission gear 710 and the second transmission gear 720.

[0142] Exemplarily, the refrigerator may further include a controller. The controller may energize the coil 812 after receiving the door opening or closing instruction. After reaching the first preset time length, for example, the first preset time length may be 1.5 seconds, at this time, the connecting gear set 730 is meshed with the first transmission gear 710 and the second transmission gear 720 under the pushing action of the push rod 811. Then, the controller may energize the driving mechanism 500, and the driving mechanism 500 drives the actuator 600 to move through the transmission gear train 700 to automatically open or close the door body 200. After the door body 200 rotates to a specified angle, the controller may stop energizing the driving mechanism 500. After reaching the second preset time length, for example, the second preset time length may be 3 seconds, it can be considered that the inertia of the door body 200 has been eliminated. The controller may stop energizing the coil 812, and the push rod 811 is retracted under the action of the elastic member 814, so that the connecting gear set 730 is separated from the first transmission gear 710 and the second transmission gear 720, and the door body 200 can be manually opened and closed.

[0143] It is understandable that the linear drive component can also be a cylinder, a hydraulic cylinder or an electric cylinder, etc., which will not be described in detail in the embodiments of the present application.

[0144] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0145] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that: The refrigerator comprises: A box body having a refrigeration compartment; A door body, which is rotatably connected to the box body and is used to open or close the refrigeration compartment; An automatic door opening and closing device, comprising: a drive mechanism configured to provide a driving force; an actuator, which is configured to open or close the door body under the action of the driving force; A transmission gear train, comprising a first transmission gear, a second transmission gear and a connecting gear set; the first transmission gear is transmission-connected to the driving mechanism; the second transmission gear is transmission-connected to the actuator; the connecting gear set is slidably mounted on the box along a sliding direction, and the sliding direction is perpendicular to the height direction of the box; A clutch mechanism comprises a clutch driving member and a first pushing member, wherein the first pushing member is rotatably mounted on the housing around a first axis and is connected to the clutch driving member, and the first axis is along the height direction of the housing; among the first pushing member and the connecting gear set, one is provided with a first sliding recess, and the other is provided with a first sliding protrusion, and the first sliding protrusion is slidably arranged in the first sliding recess; the clutch driving member drives the first pushing member to rotate around the first axis relative to the housing, and the first sliding protrusion slides in the first sliding recess to drive the connecting gear set to slide relative to the housing along the sliding direction, so that the connecting gear set is engaged with or separated from the first transmission gear and the second transmission gear.

2. The refrigerator according to claim 1, characterized in that: The extension trajectory of the first sliding recess is an arc, the arc bends toward the first axis, the center of the arc does not coincide with the first axis, and the distance difference between the two ends of the arc and the first axis is equal to the sliding distance of the connecting gear set relative to the housing.

3. The refrigerator according to claim 1 or 2, characterized in that: In the connecting gear set and the box body, one of them is provided with a second sliding recessed portion extending along the sliding direction, and the other is provided with a second sliding protruding portion, and the second sliding protruding portion is slidably arranged in the second sliding recessed portion.

4. The refrigerator according to claim 3, characterized in that: The second sliding recess is arranged on the box body; The connecting gear set includes a first connecting gear, a second connecting gear and a first rotating shaft, the first connecting gear is used to mesh with or separate from the first transmission gear; the second connecting gear is used to mesh with or separate from the second transmission gear; the first connecting gear and the second connecting gear are both sleeved on the first rotating shaft, and the first rotating shaft forms the second sliding protrusion at one end facing the box body.

5. The refrigerator according to claim 4, characterized in that: A sliding sleeve is sleeved on one end of the first rotating shaft facing the box body, and the sliding sleeve is slidably disposed in the second sliding recessed portion.

6. The refrigerator according to claim 1 or 2, characterized in that: The first pusher includes a rotating part and two sliding plates. The rotating part is connected to the box body for rotation around the first axis. The two sliding plates are arranged at intervals along the extension direction of the first axis, and the two sliding plates are respectively located on both sides of the connecting gear set.

7. The refrigerator according to claim 6, characterized in that: The two sliding plates are both provided with the first sliding recessed portion; the connecting gear set includes a first connecting gear, a second connecting gear and a first rotating shaft, the first connecting gear is used to mesh with or separate from the first transmission gear; the second connecting gear is used to mesh with or separate from the second transmission gear; the first connecting gear and the second connecting gear are located between the two sliding plates, the first connecting gear and the second connecting gear are both sleeved on the first rotating shaft, and the two ends of the first rotating shaft are respectively slidably disposed in the first sliding recessed portions of the two sliding plates to form the first sliding protrusion.

8. The refrigerator according to claim 1 or 2, characterized in that: The first pushing member is provided with a second tooth-shaped structure; The clutch drive member includes a linear drive member, which is installed on the box body. The linear drive member includes a retractable push rod, and one end of the push rod facing the first push rod is connected to a second push member. The second push member is provided with a third tooth structure, and the third tooth structure is meshed with the second tooth structure.

9. The refrigerator according to claim 8, characterized in that: The linear drive component also includes a coil, an elastic component and a limit component; the push rod is inserted into the coil, both ends of the push rod extend out of the coil, and the end of the push rod facing away from the first push component is connected to the limit component; the elastic component is sleeved on the push rod, the first end of the elastic component abuts against the coil, and the second end of the elastic component abuts against the limit component.

10. A refrigerator, characterized in that: The refrigerator comprises: A box body having a refrigeration compartment; A door body, which is rotatably connected to the box body and is used to open or close the refrigeration compartment; An automatic door opening and closing device, comprising: a drive mechanism configured to provide a driving force; an actuator, which is configured to open or close the door body under the action of the driving force; A transmission gear train, comprising a first transmission gear, a second transmission gear and a connecting gear set; the first transmission gear is transmission-connected to the driving mechanism; the second transmission gear is transmission-connected to the actuator; the connecting gear set is slidably mounted on the housing; The clutch mechanism comprises a clutch driving member and a first pushing member, wherein the first pushing member is rotatably mounted on the housing and connected to the clutch driving member; the first pushing member is slidably connected to the connecting gear set; the clutch driving member drives the first pushing member to rotate relative to the housing, and the first pushing member drives the connecting gear set to slide relative to the housing, so that the connecting gear set is engaged with or separated from the first transmission gear and the second transmission gear.

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