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 swinging mode and meshed with one of the first transmission gear and the second transmission gear. The clutch mechanism comprises a linear driving piece, and the linear driving piece is provided with a telescopic push rod; the push rod extends out and is kept in an extending state, and the push rod applies thrust to the connecting gear set to push the connecting gear set to swing relative to the box body, so that the connecting gear set is meshed with the other one of 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 provided with an automatic door opening and closing device for automatically opening or closing the door. The automatic door opening and closing device generally includes a driving mechanism that provides driving force, an actuator for opening or closing the door, a transmission gear train connecting the driving mechanism and the actuator, and a clutch mechanism for controlling the connection or disconnection of the driving mechanism and the actuator.

[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, which 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 driving mechanism is disconnected from the actuator, 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 swingably mounted on the housing and meshes with one of the first transmission gear and the second transmission gear;

[0013] The clutch mechanism includes a linear drive member having a retractable push rod; when the linear drive member is in a first state, the push rod is extended and maintained in the extended state, and the push rod applies a thrust to the connecting gear set to push the connecting gear set to swing relative to the box body, so that the connecting gear set is meshed with the other of the first transmission gear and the second transmission gear.

[0014] In the refrigerator of the embodiment of the present application, when the linear drive member is in the first state, the push rod extends and remains in the extended state, and the push rod applies a thrust to the connecting gear set to push the connecting gear set to swing relative to the housing, so that the connecting gear set is meshed with the other of the first transmission gear and the second transmission gear, so that the transmission gear train is in a connected state. The driving mechanism can drive the actuator through the transmission gear train in the connected state to automatically open or close the door body. When the linear drive member is in the second state, the push rod is retracted, and the push rod does not apply a thrust to the connecting gear set, and the connecting gear set can swing in the opposite direction relative to the housing, so that the connecting gear set is separated from the other of the first transmission gear and the second transmission gear, so that the transmission gear train is in a disconnected state. The door body can be opened or closed manually, and the force manually applied to the door body will not be transmitted to the driving mechanism to prevent damage to the driving mechanism.

[0015] When the linear drive member is in the first state, the push rod extends to push the connecting gear set. Without changing the state of the linear drive member, the push rod can be kept in the extended state. At this time, the connection state of the transmission gear train is only limited by the structural strength of the clutch mechanism itself. Compared with the related art, the clutch mechanism has a larger maximum applicable torque and does not need to increase the maximum usable torque by increasing the volume. Even if the door body is too heavy or the suction force between the door body and the box body is large, the drive mechanism and the actuator are still in the connection state, so that the door body can still be opened or closed automatically, which improves the functional reliability of the automatic door opening and closing device.

[0016] In some embodiments of the present application, the connecting gear group includes a mounting frame, a first connecting gear and a second connecting gear. The mounting frame is rotatably connected to the housing around a first axis and is used to abut against the push rod; the first connecting gear is rotatably mounted on the mounting frame, the axis of the first connecting gear coincides with the first axis, and the first connecting gear is meshed with the second transmission gear; the second connecting gear is rotatably mounted on the mounting frame and is transmission-connected with the first connecting gear; the push rod abuts against the mounting frame when it is extended, and the push rod applies the thrust to the mounting frame, so that the mounting frame drives the first connecting gear and the second connecting gear to rotate relative to the housing, so that the second connecting gear is meshed with the first transmission gear.

[0017] In this way, by installing the first connecting gear and the second connecting gear on the mounting frame, and arranging the mounting frame to be rotatably connected with the housing around the first axis, the first connecting gear and the second connecting gear form an integral structure with the mounting frame. When the push rod pushes the mounting frame, the first connecting gear and the second connecting gear can swing along with the first mounting frame, so that the second connecting gear and the first transmission gear are engaged or separated. In the process of engagement or separation, the relative position between the first connecting gear and the second connecting gear does not change, thereby improving the structural stability of the connecting gear set, thereby improving the transmission stability of the transmission gear system.

[0018] In addition, since the axis of the first connecting gear coincides with the first axis, the swing center of the mounting frame is colinear with the rotation center of the first connecting gear, so that during the swinging of the mounting frame, the axis of the first connecting gear will not change, and the first connecting gear can always be engaged with the second transmission gear, thereby improving the connection reliability between the transmission gear system and the actuator.

[0019] In some embodiments of the present application, one of the box and the mounting frame is provided with a rotating column, the axis of which is the first axis; and the other is provided with a first rotating recessed portion, which is sleeved on the outer side of the rotating column.

[0020] With such arrangement, the box body and the mounting frame can be rotatably connected via the rotating column and the first rotating recessed portion, and the first rotating recessed portion can limit the rotating column, thereby improving the stability of the box body and the mounting frame during relative rotation.

[0021] In some embodiments of the present application, the rotating column is arranged on the box body; the first rotating recessed portion is a first rotating through hole, and the first rotating through hole is arranged on the mounting frame; the end side of the first connecting gear is provided with a first connecting protrusion, the first connecting protrusion is inserted into the rotating through hole, and the first connecting protrusion is provided with a second rotating recessed portion, and the second rotating recessed portion is sleeved on the outer side of the rotating column.

[0022] With this arrangement, the mounting frame and the first connecting gear both rotate relative to the rotating column, which improves the rotation coaxiality of the mounting frame and the first connecting gear, thereby improving the position accuracy of the connecting gear set and facilitating the improvement of the structural reliability of the transmission gear system.

[0023] In some embodiments of the present application, one of the box and the mounting frame is provided with a circular arc recess, the center of an extension trajectory of the circular arc recess is located on the first axis; the other is provided with a sliding column, and the sliding column is slidably disposed in the circular arc recess.

[0024] With such arrangement, the box body and the mounting frame can be slidably connected via the circular arc recess and the sliding column. When the mounting frame swings relative to the box body, the circular arc recess can guide the relative movement between the mounting frame and the box body via the sliding column, thereby improving the position accuracy of the mounting frame and the box body when they swing relative to each other.

[0025] In some embodiments of the present application, the circular arc recess is arranged on the box body; the mounting frame is provided with a second rotating through hole, and the second rotating through hole is opposite to the circular arc recess; the end side of the second connecting gear is provided with a second connecting protrusion, and the second connecting protrusion is inserted into the second rotating through hole and can rotate in the second rotating through hole; the part of the second connecting protrusion extending out of the second rotating through hole forms the sliding column.

[0026] In this way, a sliding column can be formed by part of the second connecting protrusion, which reduces the number of parts in the connecting gear set, simplifies the mechanical structure of the connecting gear set, and improves the assembly efficiency of the connecting gear set. In addition, the mounting frame and the second connecting gear are both slidably arranged in the arc recessed portion through the sliding column formed by part of the second connecting protrusion, which improves the movement consistency of the mounting frame and the second connecting gear.

[0027] In some embodiments of the present application, the mounting frame includes a connecting plate and two mounting plates, the two mounting plates are arranged opposite to each other and at intervals, and the two mounting plates are respectively located on both sides of the first connecting gear and the second connecting gear; the connecting plate connects the two mounting plates, and the connecting plate is used to abut against the push rod.

[0028] In this way, by setting up two mounting plates, the first connecting gear and the second connecting gear can be fixed on both sides, the connection strength between the mounting frame and the first connecting gear and the second connecting gear is improved, and the stability of the first connecting gear and the second connecting gear when rotating is improved.

[0029] In some embodiments of the present application, a push block is provided at one end of the push rod facing the connecting gear group; a smoothly connected sliding surface and a contact surface are provided on the side of the push block facing the connecting plate; along the extending direction of the push rod, the sliding surface is inclined toward the center line of the push rod; the contact surface is closer to the connecting plate than the sliding surface; when the push rod is extended, the sliding surface abuts against the edge of the connecting plate and slides along the edge of the connecting plate until the contact surface abuts against the side of the connecting plate.

[0030] In this way, the direction of the thrust applied by the push rod to the mounting frame can be changed by the inclined sliding surface, and the component force of the thrust in the swinging direction of the mounting frame can be increased, thereby reducing the power requirement for the push-pull electromagnet and reducing the parts cost of the clutch mechanism. In addition, by setting the contact surface, when the mounting frame swings into place, the contact surface can abut against the side of the connecting plate, so that there is a larger contact area between the push block and the connecting plate, which improves the position stability of the mounting frame, thereby improving the transmission stability of the transmission gear train when it is in a connected state.

[0031] In some embodiments of the present application, the automatic door opening and closing device also includes a second elastic member, which connects the box body and the connecting gear set and is used to apply a restoring force opposite to the thrust to the connecting gear set.

[0032] With such a configuration, when the push rod pushes the mounting frame to swing relative to the box body, the mounting frame acts on the second elastic member, causing the second elastic member to deform and generate a restoring force. When the push rod is retracted, the mounting frame swings in the opposite direction relative to the box body under the action of the restoring force, and drives the second connecting gear to separate from the first transmission gear, so that the transmission gear system is automatically disconnected, thereby improving the response speed of the connecting gear set, and there is no need to perform a reset operation on the connecting gear set, thereby reducing the control difficulty of the clutch mechanism.

[0033] In a second aspect, an embodiment of the present application provides a refrigerator, comprising:

[0034] A box body, which is constructed with a refrigeration compartment;

[0035] A door body, which is rotatably connected to the box body and is used to open or close the refrigeration compartment;

[0036] An automatic door opening and closing device, comprising:

[0037] a drive mechanism configured to provide a driving force;

[0038] an actuator, which is configured to open or close the door body under the action of the driving force;

[0039] 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 swingably mounted on the housing, and the connecting gear set is meshed with one of the first transmission gear and the second transmission gear;

[0040] A clutch mechanism has a push rod that can be selectively extended and maintained in an extended state, and the push rod is used to apply a thrust to the connecting gear set to push the connecting gear set to swing relative to the box body, so that the connecting gear set is meshed with the other of the first transmission gear and the second transmission gear.

[0041] The refrigerator of the embodiment of the present application is provided with a transmission gear train including a first transmission gear connected to a driving mechanism, a second transmission gear connected to an actuator, and a connecting gear set that can swing relative to a housing. A clutch mechanism is provided, and the clutch mechanism has a push rod that can be selectively extended and maintained in an extended state. When the push rod is extended, it can push the connecting gear set to swing to connect the first transmission gear and the second transmission gear, so that the transmission gear train is in a connected state. Since the push rod can be maintained in an extended state, the connection state of the transmission gear train is only limited by the structural strength of the clutch mechanism. Compared with the related art, the clutch mechanism has a larger maximum applicable torque, and there is no need to increase the maximum use torque by increasing the volume. Even if the door body is too heavy or the suction force between the door body and the housing is large, the driving mechanism and the actuator are still in a connected state, so that 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

[0042] 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.

[0043] Figure 1 This is a schematic diagram of the structure of a refrigerator according to an embodiment of the present application;

[0044] Figure 2 for Figure 1 The structural diagram of the automatic door opening and closing device;

[0045] Figure 3 for Figure 2 Exploded view of the automatic door opening and closing device;

[0046] Figure 4 for Figure 3 A schematic structural diagram of the first shell;

[0047] Figure 5 for Figure 3 A schematic diagram of the structure of the second shell;

[0048] Figure 6 for Figure 2 A schematic diagram of the structure of the automatic door opening and closing device from above;

[0049] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure along the AA direction;

[0050] Figure 8 This is a schematic diagram of the structure of the door body in the embodiment of the present application;

[0051] Fig. 9 It is a schematic diagram of the transmission gear train in a connected state;

[0052] Fig.10 It is a schematic diagram when the transmission gear system is in a disconnected state;

[0053] Fig.11 for Fig.10 A schematic diagram of the structure of the connecting gear set from the first perspective;

[0054] Fig.12 for Fig.10 A second perspective structural diagram of the connecting gear set;

[0055] Fig.13 for Figure 6 Schematic diagram of the cross-sectional structure along the BB direction;

[0056] Fig.14 It is a schematic diagram of a transmission gear train in a connected state in some possible implementations of the embodiments of the present application;

[0057] Fig.15 This is a schematic diagram of a transmission gear train in a disconnected state in some possible implementations of the embodiments of the present application.

[0058] Reference numerals:

[0059] 010-Box;

[0060] 020-door body; 021-fixed recessed portion;

[0061] 030-Automatic door opening and closing device;

[0062] 100-housing;

[0063] 110-first housing; 111-first bottom plate;

[0064] 112-first side plate; 113-first sub-accommodating cavity;

[0065] 114-first connecting portion; 115-first connecting column;

[0066] 116 - second connection hole; 117 - first connection protrusion;

[0067] 118-connecting through hole; 119-arc recessed portion;

[0068] 120-a second housing; 121-a second bottom plate;

[0069] 122-a second side plate; 123-a second sub-accommodating chamber;

[0070] 124 - wiring recess; 125 - first connection hole;

[0071] 126-second connecting column; 127-accommodating groove;

[0072] 128 - third connecting hole; 129 - second connecting protrusion;

[0073] 130-first accommodating recessed portion; 131-first accommodating convex portion;

[0074] 132 - third sub-accommodating cavity; 140 - second accommodating recess;

[0075] 141 - second accommodating protrusion; 142 - fourth sub-accommodating cavity;

[0076] 150 - rotating column;

[0077] 200-driving mechanism;

[0078] 210-driving motor; 220-worm;

[0079] 221-mounting seat; 230-worm gear;

[0080] 300-Executive agency;

[0081] 310-connecting shaft; 311-tooth structure;

[0082] 312-wear-resistant gasket; 320-connector;

[0083] 321- fourth connecting hole; 322- second connecting portion;

[0084] 400-transmission gear train;

[0085] 410-first transmission gear; 420-second transmission gear;

[0086] 430-connecting gear set; 440-mounting frame;

[0087] 441-mounting plate; 442-connecting plate;

[0088] 443-first rotation recess; 444-second rotation through hole;

[0089] 445- non-closed through hole; 446- third connecting portion;

[0090] 450 - first connecting gear; 451 - third connecting protrusion;

[0091] 452 - second rotating recessed portion; 460 - second connecting gear;

[0092] 461- fourth connecting protrusion; 462- sliding column;

[0093] 470 - third connecting gear;

[0094] 500-clutch mechanism;

[0095] 510- linear driving member; 511- coil;

[0096] 512-push rod; 513-limiting member;

[0097] 514-first elastic member; 520-push block;

[0098] 521- sliding surface; 522- contact surface;

[0099] 523-first guide surface; 530-guide member;

[0100] 531- second guide surface;

[0101] 600 - second elastic member. DETAILED DESCRIPTION

[0102] 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] In view of this, an embodiment of the present application provides a refrigerator, wherein a transmission gear train is arranged to include a first transmission gear transmission-connected to a driving mechanism, a second transmission gear transmission-connected to an actuator, and a connecting gear set swingable relative to a housing; and a clutch mechanism is arranged, wherein the clutch mechanism has a push rod that can be selectively extended and maintained in an extended state. When the push rod is extended, the connecting gear set can be pushed to swing to connect the first transmission gear and the second transmission gear, so that the transmission gear train is in a connected state. Since the push rod can be maintained in an extended state, the connection state of the transmission gear train is only limited by the structural strength of the clutch mechanism. Compared with the related art, the clutch mechanism has a larger maximum applicable torque, and there is no need to increase the maximum usable torque by increasing the volume. Even if the door body is too heavy or the suction force between the door body and the housing is large, the driving mechanism and the actuator are still in a connected state, so that the door body can still be opened or closed automatically, thereby improving the functional reliability of the automatic door opening and closing device.

[0110] 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.

[0111] refer to Figure 1 , an embodiment of the present application provides a refrigerator, which may include a box body 010 and a door body 020. The box body 010 may be configured with a refrigeration compartment. The refrigeration compartment may be used to place food and other items. The door body 020 is rotatably connected to the box body 010 and is used to open or close the refrigeration compartment. Exemplarily, the number of refrigeration compartments may be one or more. One door body 020 may be corresponding to the same refrigeration compartment. Or, as Figure 1 As shown, two door bodies 020 may be correspondingly arranged in the same refrigeration compartment.

[0112] The refrigerator of the embodiment of the present application may further include an automatic door opening and closing device 030, which is configured to automatically open or close the door body 020, thereby improving the convenience of opening and closing the door body 020 and enhancing the user experience. For example, the number of automatic door opening and closing devices 030 may be the same as the number of door bodies 020. That is, one automatic door opening and closing device 030 may be provided corresponding to each door body 020. Each automatic door opening and closing device 030 may automatically open or close the door body 020 corresponding thereto.

[0113] refer to Figure 2 and Figure 3The automatic door opening and closing device 030 may include a driving mechanism 200, an actuator 300, and a transmission gear train 400. The driving mechanism 200 is configured to provide a driving force. The actuator 300 is configured to open or close the door body 020 under the action of the driving force. The transmission gear train 400 may connect the driving mechanism 200 and the actuator 300, and the driving mechanism 200 transmits the driving force to the actuator 300 through the transmission gear train 400, so that the door body 020 can be automatically opened or closed.

[0114] The automatic door opening and closing device 030 may further include a housing 100, and the housing 100 may be connected to the box 010. For example, the housing 100 may be installed at the top of the box 010. It is understandable that the housing 100 may also be installed at other positions of the box 010, and the embodiment of the present application will not be repeated. The housing 100 may be configured with a first accommodating chamber, and at least part of the driving mechanism 200, the transmission gear train 400 and the actuator 300 may be accommodated and installed in the first accommodating chamber to be indirectly installed on the box 010. By providing the housing 100, at least part of the components of the automatic door opening and closing device 030 may be arranged in the housing 100, so as to modularize the automatic door opening and closing device 030, thereby improving the convenience of assembling, installing and maintaining the automatic door opening and closing device 030. The technical solution of the embodiment of the present application is described below by taking at least part of the driving mechanism 200, the transmission gear train 400 and the actuator 300 as an example of being arranged in the housing 100.

[0115] For example, the housing 100 may be a split structure, so that the driving mechanism 200, the transmission gear train 400, the actuator 300 or other components can be installed in the housing 100. Figure 3 As shown, the housing 100 may include a first housing 110 and a second housing 120 that are detachably connected, and the first housing 110 and the second housing 120 are buckled together to form a first accommodating cavity.

[0116] refer to Figure 4 , the first housing 110 may include a first bottom plate 111 and a first side plate 112. The first side plate 112 is perpendicular to the first bottom plate 111, surrounds the first bottom plate 111, and is connected to the edge of the first bottom plate 111. The first side plate 112 and the first bottom plate 111 are arranged to form a first sub-accommodation cavity 113 having a first opening. The first bottom plate 111 may be connected to the top end of the box body 010. For example, the edge of the first bottom plate 111 may be provided with a first connecting portion 114, and the first connecting portion 114 may be detachably connected to the top end of the box body 010 by a connecting bolt.

[0117] refer to Figure 5, the second shell 120 may include a second bottom plate 121 and a second side plate 122. The second side plate 122 is perpendicular to the second bottom plate 121, surrounds the second bottom plate 121, and is connected to the edge of the second bottom plate 121. The second side plate 122 and the second bottom plate 121 are arranged to form a second sub-accommodation cavity 123 having a second opening. When the first shell 110 and the second shell 120 are buckled together, the second opening of the second sub-accommodation cavity 123 is opposite to the first opening of the first sub-accommodation cavity 113, forming a first accommodation cavity.

[0118] Exemplarily, a wiring recess 124 may be provided on the side of the second bottom plate 121 facing away from the second sub-accommodation cavity 123. The wiring recess 124 is used to accommodate the electrical connection wires of the refrigerator, thereby improving the convenience of wiring during the production of the refrigerator.

[0119] The first housing 110 and the second housing 120 can be detachably connected by bolts. Figures 3 to 5 As shown, at least one first connecting column 115 may be provided on one side of the first bottom plate 111 located in the first sub-accommodating cavity 113, and a first threaded hole may be provided on the side of the first connecting column 115 facing away from the first bottom plate 111. The second bottom plate 121 may be provided with at least one first connecting hole 125. At least one connecting hole is provided corresponding to at least one first connecting column 115. When the first shell 110 and the second shell 120 are interlocked, the first connecting hole 125 is opposite to the first threaded hole. The connecting bolt may be inserted into the first connecting hole 125 and threadedly connected in the first threaded hole to detachably connect the first shell 110 and the second shell 120. In some possible implementations of the embodiments of the present application, the first shell 110 and the second shell 120 may also be detachably connected by a snap-on protrusion and a snap-on recess, which will not be described in detail herein. Compared with the detachable connection between the first shell 110 and the second shell 120 via the snap-fit ​​protrusions and the snap-fit ​​recesses, the detachable connection via connecting bolts can improve the connection strength between the first shell 110 and the second shell 120, and can improve the accuracy of the relative position between the first shell 110 and the second shell 120.

[0120] For example, Figure 4 As shown, a second connection hole 116 may be provided on one side of the first bottom plate 111 located in the first sub-accommodation cavity 113. Figure 5As shown, a second connecting column 126 may be provided on one side of the second bottom plate 121 located in the second sub-accommodating chamber 123, and an accommodating groove 127 may be provided on the side of the second connecting column 126 facing away from the second sub-accommodating chamber 123. A third connecting hole 128 may be provided at the bottom of the accommodating groove 127, and the third connecting hole 128 is opposite to the second connecting hole 116 for the connection bolt to pass through, so that the first bottom plate 111 and the second bottom plate 121 can be detachably mounted on the box body 010 through the connection bolt. In this way, the first housing 110, the second housing 120 and the box body 010 can be connected by the same connection bolt, which improves the connection strength between the first housing 110, the second housing 120 and the box body 010, and saves the number of parts, which is conducive to improving the assembly efficiency of the automatic door opening and closing device 030. In addition, the head of the connection bolt can be accommodated in the accommodating groove 127, so as to prevent the connection bolt from protruding from the first bottom plate 111 and interfering with other parts.

[0121] like Figure 4 and Figure 5 As shown, a first connecting protrusion 117 may be provided on a side of the first side plate 112 facing away from the first bottom plate 111. A second connecting protrusion 129 may be provided on a side of the second side plate 122 facing away from the second bottom plate 121. When the first shell 110 and the second shell 120 are buckled together, the outer surface of the first connecting protrusion 117 facing away from the first sub-accommodation cavity 113 may contact the inner surface of the second connecting protrusion 129 located in the second sub-accommodation cavity 123, so as to preliminarily position the first shell 110 and the second shell 120, thereby improving the convenience when connecting the first shell 110 and the second shell 120, and improving the accuracy of the relative position between the first shell 110 and the second shell 120. In addition, the first connecting protrusion 117 and the second connecting protrusion 129 can also block impurities such as moisture and dust to prevent impurities from entering the first accommodation cavity through the gap between the first shell 110 and the second shell 120, thereby improving the protection performance of the shell 100.

[0122] The driving mechanism 200 is used to provide driving force. Figure 3 As shown, the driving mechanism 200 may include a driving motor 210, and the driving motor 210 has an output shaft, and the output shaft may be drivingly connected to the transmission gear train 400. The driving motor 210 may provide a rotational driving force for the automatic door opening and closing device 030. It is understandable that the driving motor 210 may be replaced by a pneumatic motor or a hydraulic motor, etc., and this embodiment of the present application will not be described in detail.

[0123] The driving motor 210 may be fixed by the first housing 110 and the second housing 120. Figures 3 to 5As shown, a first receiving recess 130 may be provided on one side of the first bottom plate 111 located in the first sub-receiving cavity 113, a first receiving protrusion 131 is provided on the outer side of the first receiving recess 130, and the first receiving protrusion 131 surrounds at least part of the first receiving recess 130 to form a third sub-receiving cavity 132 with the first receiving recess 130. A second receiving recess 140 may be provided on one side of the second bottom plate 121 located in the second sub-receiving cavity 123, a second receiving protrusion 141 is provided on the outer side of the second sub-receiving recess, and the second receiving protrusion 141 surrounds the second receiving recess 140 to form a fourth sub-receiving cavity 142 with the second receiving recess 140. When the first shell 110 and the second shell 120 are buckled with each other, the first receiving protrusion 131 and the second receiving protrusion 141 are in contact with each other, and the third sub-receiving cavity 132 and the fourth sub-receiving cavity 142 form a second receiving cavity. The driving motor 210 may be accommodated and fixed in the second accommodation cavity.

[0124] The drive motor 210 is fixed by the first shell 110 and the second shell 120, and there is no need to set an additional fixing structure for the drive motor 210, which reduces the number of parts of the automatic door opening and closing device 030 and improves the assembly efficiency of the automatic door opening and closing device 030; and there is no need to reserve installation space for the additional fixing structure in the shell 100, which improves the space utilization rate in the shell 100, reduces the volume of the shell 100, and is conducive to the miniaturization of the automatic door opening and closing device 030.

[0125] When installing the drive motor 210, the first housing 110 can be provided first, and then the drive motor 210 can be placed so that part of the drive motor 210 is accommodated in the third sub-accommodation cavity 132 of the first housing 110. Then the second housing 120 is snapped onto the first housing 110, and the fourth sub-accommodation cavity 142 of the second housing 120 is covered on another part of the drive motor 210, and the second accommodation protrusion 141 is connected to the first accommodation protrusion 131, so that the drive motor 210 is accommodated in the second accommodation cavity. Then the first housing 110 and the second housing 120 are connected so that the drive motor 210 is fixed in the second accommodation cavity. The second accommodation cavity can wrap the drive motor 210, increase the contact surface 522 area between the first housing 110 and the second housing 120 and the drive motor 210, can effectively reduce the vibration generated when the drive motor 210 is working, and improve the working stability of the drive motor 210.

[0126] The driving mechanism 200 may further include a worm 220 and a worm wheel 230. The first end of the worm 220 may be connected to the output shaft of the driving motor 210. The worm wheel 230 is rotatably mounted on the housing 100, and the worm wheel 230 is meshed with the worm 220 and connected to the transmission gear system 400. When the output shaft of the driving motor 210 rotates, the output shaft drives the worm 220 to rotate, the worm 220 drives the worm wheel 230 meshed therewith to rotate, and the worm wheel 230 drives the transmission gear system 400 and the actuator 300 to operate to open or close the door body 020. The worm 220 and the worm wheel 230 can reduce the rotation speed of the driving force provided by the driving motor 210, increase the torque of the driving force, and change the direction of the driving force to meet the driving force requirements of the actuator 300.

[0127] The driving mechanism 200 may further include a mounting seat 221, which may be connected to the first bottom plate 111 and spaced apart from the driving motor 210. Figure 4 As shown, the mounting seat 221 can be spaced apart from the accommodating recess for mounting the drive motor 210. The second end of the worm 220 can be rotatably connected to the mounting seat 221. When the output shaft of the drive motor 210 drives the worm 220 to rotate, the mounting seat 221 can support the second end of the worm 220, thereby improving the stability of the worm 220 during rotation, thereby improving the transmission stability of the transmission assembly.

[0128] The actuator 300 is used to open or close the door body 020 under the action of a driving force. Figure 3 , the portion of the housing 100 facing the door body 020 may be provided with a connecting through hole 118. The connecting through hole 118 is connected to the first accommodating chamber. The actuator 300 may include a connecting shaft 310, and the connecting shaft 310 may be inserted into the connecting through hole 118 and rotatable in the connecting through hole 118. The portion of the connecting shaft 310 located in the first accommodating chamber is transmission-connected to the transmission gear train 400. One end of the connecting shaft 310 is located outside the housing 100 and is fixedly connected to the door body 020. When the driving mechanism 200 is actuated, the connecting shaft 310 can be driven to rotate relative to the housing 100 through the transmission gear train 400, and the connecting shaft 310 can drive the door body 020 to rotate relative to the box body 010, so as to automatically open or close the door body 020.

[0129] For example Figure 3 and Figure 7As shown, a toothed structure 311 may be provided on the circumferential side of the portion of the connecting shaft 310 located in the first accommodating cavity, and the toothed structure 311 may mesh with the transmission gear train 400. By providing the toothed structure 311 meshed with the transmission gear train 400, the transmission accuracy and transmission efficiency between the transmission gear train 400 and the connecting shaft 310 may be improved, and the requirements for the driving power of the driving motor 210 may be reduced, thereby reducing the cost of the driving motor 210, and further reducing the component cost of the automatic door opening and closing device 030.

[0130] For example, Figure 6 and Figure 7 As shown, the connecting shaft 310 can be a hollow shaft. The first bottom plate 111 and the second bottom plate 121 can both be provided with a connecting through hole 118. The connecting shaft 310 is inserted into the connecting through hole 118 of the first bottom plate 111, and the first end of the connecting shaft 310 is located in the connecting through hole 118 of the second bottom plate 121. The second connecting through hole 118 of the second bottom plate 121 is connected to the wiring recess 124. In this way, the electrical connection line accommodated in the wiring recess 124 can be routed from the inside of the connecting shaft 310, preventing the electrical connection line from being pulled or bent and damaged or broken during the process of opening or closing the door body 020, thereby improving the electrical connection reliability of the refrigerator.

[0131] A wear-resistant gasket 312 can be provided between the connecting shaft 310 and the connecting through hole 118 to reduce the wear between the connecting shaft 310 and the shell 100 during the rotation of the door body 020, thereby extending the service life of the connecting shaft 310 and the shell 100, thereby improving the structural reliability of the automatic opening and closing door device 030.

[0132] The second end of the connecting shaft 310 can extend out of the connecting through hole 118 provided on the first bottom plate 111 to be fixedly connected to the door body 020. Figure 3 and Figure 7 As shown, the second end of the connecting shaft 310 may be provided with a connecting member 320. The connecting member 320 is fixedly connected to the door body 020. In the process of assembling the connecting shaft 310 and the door body 020, the connecting member 320 may be trimmed to meet the assembly requirements between the connecting shaft 310 and the door body 020, without trimming the connecting shaft 310 and the door body 020, thereby improving the convenience of assembling the connecting shaft 310 and the door body 020.

[0133] Exemplarily, a fourth connection hole 321 may be provided in the connecting member 320, and the fourth connection hole 321 may be sleeved on the second end of the connecting shaft 310. The fourth connection hole 321 may be a first non-circular hole. The cross section of the circumferential side of the connecting shaft 310 near its second end is a first non-circular shape corresponding to the first non-circular hole. For example, the first non-circular hole may be a rectangular hole or a polygonal hole, etc., and the first non-circular shape may be a rectangle or a polygon, etc. When the connecting shaft 310 drives the connecting member 320 to rotate, the connecting shaft 310 and the connecting member 320 may be prevented from rotating relative to each other, thereby improving the rotation consistency of the connecting shaft 310 and the connecting member 320.

[0134] refer to Figure 8 , a fixed recessed portion 021 may be provided at one end of the door body 020 facing the connecting shaft 310, and the fixed recessed portion 021 may be sleeved on the circumferential side of the connecting member 320. The cross-section of the circumferential side of the connecting member 320 may be a second non-circular shape. The orthographic projection of the fixed recessed portion 021 at one end of the door body 020 facing the connecting shaft 310 may also be a second non-circular shape, for example, a rectangular hole or a polygonal hole. When the connecting shaft 310 drives the door body 020 to rotate through the connecting member 320, relative rotation between the connecting member 320 and the door body 020 can be prevented, thereby improving the rotation consistency of the connecting member 320 and the door body 020.

[0135] For example, the circumferential side of the connecting piece 320 may be further provided with a second connecting portion 322, and the second connecting portion 322 may be opposite to one end of the door body 020 facing the connecting shaft 310. The second connecting portion 322 may be connected to the door body 020 by connecting bolts to further improve the connection strength between the connecting piece 320 and the door body 020, and prevent the connecting piece 320 from being separated from the door body 020.

[0136] The automatic door opening and closing device 030 may further include a clutch mechanism 500, which may be used to control the connection or disconnection of the driving mechanism 200 and the actuator 300. When the clutch mechanism 500 causes the driving mechanism 200 and the actuator 300 to be in a connected state, the driving mechanism 200 may drive the actuator 300 to automatically open or close the door body 020. When the clutch mechanism 500 causes the driving mechanism 200 and the actuator 300 to be in a disconnected state, the door body 020 may be manually opened or closed, so that the refrigerator can switch between the automatic door opening and closing function and the manual door opening and closing function. Moreover, the force of manually opening or closing the door body 020 will not be reversely transmitted to the driving mechanism 200, so as to prevent the driving mechanism 200 from being damaged, thereby improving the reliability of the automatic door opening and closing device 030.

[0137] For example, the clutch mechanism 500 can act on the transmission gear train 400, so that the transmission gear train 400 is in a connected state or a disconnected state. Fig. 9, the transmission gear train 400 may include a first transmission gear 410, a second transmission gear 420 and a connecting gear set 430. The first transmission gear 410 is transmission-connected to the driving mechanism 200. For example, the first transmission gear 410 may be transmission-connected to the worm gear 230 via at least one transmission gear. Alternatively, the first transmission gear 410 may also be directly coaxially connected to the worm gear 230. The second transmission gear 420 may be transmission-connected to the actuator 300. For example, the second transmission gear 420 may be meshed with the toothed structure 311. Alternatively, the second transmission gear 420 may also be meshed with the toothed structure 311 via at least one transmission gear. The connecting gear set 430 is swingably mounted on the housing 010, for example, the connecting gear set 430 is swingably mounted in the housing 100. The connecting gear set 430 is meshed with one of the first transmission gear 410 and the second transmission gear 420. The clutch mechanism 500 has a push rod 512 that can be selectively extended and maintained in the extended state. The push rod 512 is used to apply thrust to the connecting gear set 430 to push the connecting gear set 430 to swing relative to the box body 010, so that the connecting gear set 430 is meshed with the other of the first transmission gear 410 and the second transmission gear 420.

[0138] like Fig. 9 As shown, when the push rod 512 is extended and maintained in the extended state, it can push the connecting gear set 430 to swing relative to the housing 100, so that the connecting gear set 430 connects the first transmission gear 410 and the second transmission gear 420, so that the transmission gear train 400 is in a connected state. The driving mechanism 200 can drive the actuator 300 to operate through the transmission gear train 400 to open or close the door body 020. Fig.10 As shown, when the push rod 512 is retracted, the connecting gear set 430 can swing in the opposite direction relative to the shell 100, and the connecting gear set 430 disconnects the first transmission gear 410 and the second transmission gear 420, so that the transmission gear system 400 is in a disconnected state, and the door body 020 can be manually opened or closed.

[0139] When the door body 020 is opened or closed automatically, since the push rod 512 can be kept in the extended state, the connection state of the transmission gear train 400 is only limited by the structural strength of the clutch mechanism 500. Compared with the related art, the clutch mechanism 500 has a larger maximum applicable torque, and there is no need to increase the maximum use torque by increasing the volume. Even if the door body 020 is too heavy or the suction force between the door body 020 and the box body 010 is large, the driving mechanism 200 and the actuator 300 are still in the connection state, so that the door body 020 can still be opened or closed automatically, thereby improving the functional reliability of the automatic door opening and closing device 030.

[0140] For example, Fig. 9 and Fig.10As shown, the clutch mechanism 500 may include a linear drive member 510, and the linear drive member 510 may have a retractable push rod 512. When the linear drive member 510 is in the first state, the push rod 512 extends and remains in the extended state, and the push rod 512 applies a thrust to the connecting gear set 430 to push the connecting gear set 430 to swing relative to the box body 010, so that the connecting gear set 430 is meshed with the other of the first transmission gear 410 and the second transmission gear 420, so that the transmission gear train 400 is in a connected state. The driving mechanism 200 can drive the actuator 300 through the transmission gear train 400 in the connected state to automatically open or close the door body 020. When the linear drive member 510 is in the second state, the push rod 512 is retracted, and the push rod 512 does not apply thrust to the connecting gear set 430. The connecting gear set 430 can swing in the opposite direction relative to the box body 010, so that the connecting gear set 430 is separated from the other of the first transmission gear 410 and the second transmission gear 420, so that the transmission gear system 400 is in a disconnected state. The door body 020 can be opened or closed manually, and the force manually applied to the door body 020 will not be transmitted to the driving mechanism 200 to prevent damage to the driving mechanism 200.

[0141] When the linear drive member 510 is in the first state, the push rod 512 extends to push the connecting gear set 430. Without changing the state of the linear drive member 510, the push rod 512 can be kept in the extended state. At this time, the connection state of the transmission gear system 400 is only limited by the structural strength of the clutch mechanism 500 itself. Compared with the related art, the clutch mechanism 500 has a larger maximum applicable torque, and there is no need to increase the maximum usable torque by increasing the volume. Even if the door body 020 is too heavy or the suction force between the door body 020 and the box body 010 is large, the drive mechanism 200 and the actuator 300 are still in the connection state, so that the door body 020 can still be opened or closed automatically, thereby improving the functional reliability of the automatic door opening and closing device 030.

[0142] Exemplarily, the connecting gear set 430 can always be meshed with one of the first transmission gear 410 and the second transmission gear 420. When the push rod 512 is extended, the push rod 512 can push the connecting gear set 430 to swing, so that the connecting gear set 430 is meshed with the other of the first transmission gear 410 and the second transmission gear 420. The following takes the example that the connecting gear set 430 is always meshed with the second transmission gear 420, and when the connecting gear set 430 is pushed by the push rod 512, it is meshed with the first transmission gear 410 group, and the technical solution of the embodiment of the present application is described. The technical solution that the connecting gear set 430 is always meshed with the first transmission gear 410, and when the connecting gear set 430 is pushed by the push rod 512, it is meshed with the second transmission gear 420 group can be referred to the following description, which will not be repeated here.

[0143] For example, reference Fig.11 and Fig.12 , the connecting gear set 430 may include a mounting frame 440, a first connecting gear 450, and a second connecting gear 460. The mounting frame 440 may be rotatably connected to the housing 010 around the first axis S1. For example, the mounting frame 440 may be disposed in the housing 100, and rotatably connected to the housing 100 around the first axis S1. The mounting frame 440 is also used to abut against the push rod 512. The first connecting gear 450 is rotatably mounted on the mounting frame 440, the axis of the first connecting gear 450 coincides with the first axis S1, and the first connecting gear 450 is meshed with the second transmission gear 420. The second connecting gear 460 is rotatably mounted on the mounting frame 440, and is transmission-connected to the first connecting gear 450. For example Fig.12 As shown, the connecting gear set 430 may further include a third connecting gear 470, and the third connecting gear 470 may be coaxially arranged with the second connecting gear 460, and the third connecting gear 470 may mesh with the first connecting gear 450. Alternatively, in some possible implementations, the second connecting gear 460 may directly mesh with the first connecting gear 450. When the push rod 512 is extended, it abuts against the mounting frame 440, and the push rod 512 applies a thrust to the mounting frame 440, so that the mounting frame 440 drives the first connecting gear 450 and the second connecting gear 460 to rotate relative to the box body 010, so that the second connecting gear 460 meshes with the first transmission gear 410.

[0144] By installing the first connecting gear 450 and the second connecting gear 460 on the mounting frame 440, and setting the mounting frame 440 to be rotatably connected with the box body 010 around the first axis S1, the first connecting gear 450, the second connecting gear 460 and the mounting frame 440 form an integral structure. When the push rod 512 pushes the mounting frame 440, the first connecting gear 450 and the second connecting gear 460 can swing along with the first mounting frame 440, so that the second connecting gear 460 is meshed with or separated from the first transmission gear 410. In the process of meshing or separating, the relative position between the first connecting gear 450 and the second connecting gear 460 will not change, thereby improving the structural stability of the connecting gear set 430, thereby improving the transmission stability of the transmission gear system 400.

[0145] In addition, since the axis of the first connecting gear 450 coincides with the first axis S1, the swing center of the mounting frame 440 is colinear with the rotation center of the first connecting gear 450, so that during the swinging of the mounting frame 440, the axis of the first connecting gear 450 will not change, and the first connecting gear 450 can always be engaged with the second transmission gear 420, thereby improving the connection reliability between the transmission gear system 400 and the actuator 300.

[0146] Exemplarily, the mounting frame 440 may include a connecting plate 442 and two mounting plates 441, the two mounting plates 441 are arranged opposite to each other and spaced apart, and the two mounting plates 441 are respectively located on both sides of the first connecting gear 450 and the second connecting gear 460. The connecting plate 442 connects the two mounting plates 441, and the connecting plate 442 is used to abut against the push rod 512. By providing two mounting plates 441, the fixing of both sides of the first connecting gear 450 and the second connecting gear 460 can be enhanced, the connection strength between the mounting frame 440 and the first connecting gear 450 and the second connecting gear 460 is improved, and the stability of the first connecting gear 450 and the second connecting gear 460 when rotating is improved.

[0147] For example, one of the box 010 and the mounting frame 440 may be provided with a rotating column 150, the axis of which is the first axis S1. The other may be provided with a first rotating recessed portion 443, which is sleeved on the outer side of the rotating column 150. The box 010 and the mounting frame 440 may be rotatably connected via the rotating column 150 and the first rotating recessed portion 443, and the first rotating recessed portion 443 may limit the rotating column 150, thereby improving the stability of the box 010 and the mounting frame 440 when they rotate relative to each other.

[0148] The rotating column 150 can be disposed on the box 010. For example Fig.13 As shown, the rotating column 150 can be arranged on the housing 100, so as to be indirectly arranged on the box body 010. Exemplarily, the first bottom plate 111 and the second bottom plate 121 can both be provided with the rotating column 150. The two mounting plates 441 can both be provided with the first rotating recessed portion 443. The two rotating columns 150 can be inserted into the two first rotating recessed portions 443, respectively. In this way, the two mounting plates 441 can be rotatably connected to the first bottom plate 111 and the second bottom plate 121, respectively, so as to improve the stability of the mounting frame 440 when rotating.

[0149] In some possible implementations of the embodiment of the present application, the first rotation recess 443 may be a rotation groove, and the rotation column 150 may be inserted into the rotation recess and rotatable in the rotation recess.

[0150] Or, if Fig.13As shown, the first rotation recess 443 may be a first rotation through hole, and the first rotation through hole is provided on the mounting frame 440, for example, the first rotation through hole may be provided on the mounting plate 441. The end side of the first connecting gear 450 may be provided with a third connecting protrusion 451, and the third connecting protrusion 451 may be inserted into the first rotation through hole, and the third connecting protrusion 451 may be provided with a second rotation recess 452, and the second rotation recess 452 is sleeved on the outer side of the rotating column 150. In this way, the mounting frame 440 and the first connecting gear 450 both rotate relative to the rotating column 150, which improves the rotation coaxiality of the mounting frame 440 and the first connecting gear 450, thereby improving the position accuracy of the connecting gear set 430, which is beneficial to improving the structural reliability of the transmission gear system 400.

[0151] In the box body 010 and the mounting frame 440, one of them may be provided with a circular arc recessed portion 119, and the center of the extension track of the circular arc recessed portion 119 may be located on the first axis S1. The other may be provided with a sliding column 462, and the sliding column 462 may be slidably disposed in the circular arc recessed portion 119. The box body 010 and the mounting frame 440 may be slidably connected through the circular arc recessed portion 119 and the sliding column 462. When the mounting frame 440 swings relative to the box body 010, the circular arc recessed portion 119 can guide the relative movement between the mounting frame 440 and the box body 010 through the sliding column 462, thereby improving the position accuracy of the mounting frame 440 and the box body 010 when the relative swing occurs.

[0152] Exemplarily, the arc recessed portion 119 may be disposed on the mounting frame 440 , and the sliding column 462 may be disposed on the box body 010 .

[0153] Alternatively, refer to Figure 3 , Fig.12 and Fig.13, the arc recessed portion 119 can be arranged on the box body 010, for example, it can be arranged on the first bottom plate 111 of the first shell 110. The sliding column 462 can be arranged on the mounting frame 440. For example, the mounting frame 440 can be provided with a second rotating through hole 444, and the second rotating through hole 444 can be opposite to the arc recessed portion 119. The end side of the second connecting gear 460 can be provided with a fourth connecting protrusion 461, and the fourth connecting protrusion 461 can be inserted into the second rotating through hole 444 and can rotate in the second rotating through hole 444. The part of the fourth connecting protrusion 461 extending out of the second rotating through hole 444 forms the sliding column 462. In this way, the sliding column 462 can be formed by part of the fourth connecting protrusion 461, which reduces the number of parts in the connecting gear set 430, simplifies the mechanical structure of the connecting gear set 430, and improves the assembly efficiency of the connecting gear set 430. In addition, the mounting frame 440 and the second connecting gear 460 are both slidably disposed in the arc recessed portion 119 through a sliding column 462 formed by a portion of the fourth connecting protrusion 461 , thereby improving the movement consistency of the mounting frame 440 and the second connecting gear 460 .

[0154] Exemplarily, the linear drive member 510 may be a push-pull electromagnet, or may be a cylinder, a hydraulic cylinder, or an electric cylinder, etc. The technical solution of the embodiment of the present application is described below by taking the linear drive member 510 as a push-pull electromagnet as an example.

[0155] The push-pull electromagnet may include a coil 511 and a push rod 512, wherein the push rod 512 is inserted into the coil 511, and both ends of the push rod 512 may extend out of the coil 511. When the coil 511 is energized, the push rod 512 may move relative to the coil 511 and extend to push the mounting frame 440 to swing relative to the box 010. If the coil 511 is continuously energized, the push rod 512 may remain in the extended state. When the coil 511 is de-energized, the push rod 512 may be retracted, and the mounting frame 440 may swing in the opposite direction relative to the box 010.

[0156] Exemplarily, the refrigerator may further include a controller. The controller may energize the coil 511 after receiving an opening or closing instruction. After reaching a first preset duration, for example, the first preset duration may be 1.5 seconds, at which time, the second connecting gear 460 may mesh with the first transmission gear 410. Then, the controller may energize the drive motor 210, and the driving force of the drive motor 210 is transmitted to the door body 020 through the transmission gear train 400 and the actuator 300. After the door body 020 rotates to a specified angle, the controller may stop energizing the drive motor 210. After reaching a second preset duration, for example, the second preset duration may be 3 seconds, it may be considered that the inertia of the door body 020 has been eliminated. The controller stops energizing the coil 511, and the second connecting gear 460 disengages from the first transmission gear 410, at which time the door body 020 may be manually switched.

[0157] Exemplarily, the push-pull electromagnet may further include a first elastic member 514 and a stopper 513, and the stopper 513 may be disposed at one end of the push rod 512. For example, the stopper 513 may be disposed at one end of the push rod 512 that is opposite to the connecting gear set 430. The first elastic member 514 may be sleeved on the push rod 512, and the first end of the first elastic member 514 may abut against the stopper 513, and the second end of the first elastic member 514 may abut against the coil 511 to apply a force opposite to the extension direction to the push rod 512. When the coil 511 is energized and the push rod 512 is extended, the stopper 513 moves with the push rod 512, so that the first elastic member 514 is deformed and generates a force opposite to the extension direction of the push rod 512, and the force acts on the push rod 512 through the stopper 513. When the coil 511 is de-energized, the push rod 512 is reset and retracted under the action of the force.

[0158] refer to Fig. 9 and Fig.10 The push rod 512 may be provided with a push block 520 at one end thereof facing the gear set 430. For example, the push block 520 may be provided with a mounting hole, and the mounting hole may be sleeved on the end of the push rod 512 facing the gear set 430. The push rod 512 pushes the mounting frame 440 to swing relative to the box 010 through the push block 520.

[0159] Exemplarily, a sliding surface 521 and a contact surface 522 that are smoothly connected may be provided on one side of the push block 520 that faces the connecting plate 442. Along the extension direction of the push rod 512, the sliding surface 521 is inclined toward the center line of the push rod 512. The contact surface 522 is closer to the connecting plate 442 than the sliding surface 521. When the push rod 512 is extended, the sliding surface 521 abuts against the edge of the connecting plate 442 and slides on the edge of the connecting plate 442 until the contact surface 522 abuts against the side of the connecting plate 442.

[0160] By tilting the sliding surface 521, the direction of the thrust applied by the push rod 512 to the mounting frame 440 can be changed, and the component force of the thrust in the swinging direction of the mounting frame 440 can be increased, thereby reducing the power requirement for the push-pull electromagnet and reducing the parts cost of the clutch mechanism 500. In addition, by providing the contact surface 522, when the mounting frame 440 swings into place, the contact surface 522 can abut against the side of the connecting plate 442, so that there is a larger contact surface 522 area between the push block 520 and the connecting plate 442, thereby improving the position stability of the mounting frame 440, thereby improving the transmission stability of the transmission gear train 400 when it is in the connected state.

[0161] like Fig. 9 and Fig.10As shown, a first guide surface 523 may be provided on the side of the push rod 512 facing away from the connecting plate 442. The clutch mechanism 500 may further include a guide member 530, which may be provided on the box body 010. For example, the guide member 530 may be provided on the side of the first bottom plate 111 located in the first sub-accommodating chamber 113, so as to be indirectly provided on the box body 010. The guide member 530 may be provided with a second guide surface 531. When the push rod 512 is extended, the first guide surface 523 abuts against the second guide surface 531 and slides relative to the second guide surface 531. Through the contacting first guide surface 523 and second guide surface 531, the guide member 530 may guide the push rod 512 to improve the stability of the push rod 512 when it is extended.

[0162] The automatic door opening and closing device 030 may further include a second elastic member 600, which is connected to the housing 010 and the connecting gear set 430, and is used to apply a restoring force opposite to the thrust to the connecting gear set 430. When the push rod 512 pushes the mounting frame 440 to swing relative to the housing 010, the mounting frame 440 acts on the second elastic member 600, causing the second elastic member 600 to deform and generate a restoring force. When the push rod 512 is retracted, the mounting frame 440 swings in the opposite direction relative to the housing 010 under the action of the restoring force, and drives the second connecting gear 460 to separate from the first transmission gear 410, so that the transmission gear system 400 is automatically in a disconnected state, thereby improving the response speed of the connecting gear set 430, and there is no need to perform a reset operation on the connecting gear set 430, thereby reducing the control difficulty of the clutch mechanism 500.

[0163] For example, the second elastic member 600 may be a tension spring, which may be disposed on the side of the mounting frame 440 facing the push rod 512. The first end of the tension spring may be connected to the box body 010, for example, may be connected to the first bottom plate 111. The second end of the tension spring may be connected to the mounting frame 440. Fig.11 As shown, a non-closed through hole 445 may be formed on the connecting plate 442, and the non-closed through hole 445 is surrounded to form a third connecting portion 446. The second end of the tension spring may be hooked on the third connecting portion 446. When the mounting frame 440 swings relative to the box body 010, the tension spring is stretched to generate a restoring force opposite to the thrust applied by the push rod 512.

[0164] In some possible implementations of the present application, the second elastic member 600 may be a compression spring, which may be disposed on a side of the mounting frame 440 facing away from the push rod 512. The first end of the compression spring may be connected to the box body 010, for example, it may be connected to the first bottom plate 111. The second end of the tension spring may be connected to the mounting frame 440, for example, it may be connected to the mounting plate 441 of the mounting frame 440. When the mounting frame 440 swings relative to the box body 010, the compression spring is compressed to generate a restoring force opposite to the thrust applied by the push rod 512.

[0165] In some other possible implementations of the embodiments of the present application, refer to Fig.14 and Fig.15 The second elastic member 600 may also be an elastic pad, which may be disposed on the box body 010, for example, on the first side plate 112 of the first shell 110. The elastic pad abuts against the edge of the connecting plate 442 away from the push block 520. Fig.14 As shown, when the push rod 512 is extended, the push rod 512 pushes the mounting frame 440 to swing counterclockwise relative to the box 010, and the edge of the connecting plate 442 away from the push block 520 applies pressure to the elastic pad, causing the elastic pad to deform and generate a restoring force. Fig.15 As shown, when the push rod 512 is retracted, the restoring force generated by the elastic pad acts on the edge of the connecting plate 442 away from the push block 520, so that the mounting frame 440 rotates clockwise relative to the box body 010, that is, the connecting gear set 430 is reset. Compared with the tension spring and the compression spring, the second elastic member 600 is set as an elastic pad, which can reduce the space it occupies, which is conducive to the miniaturization of the automatic door opening and closing device 030.

[0166] 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.

[0167] 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 swingably mounted on the housing and meshes with one of the first transmission gear and the second transmission gear; The clutch mechanism includes a linear drive member having a retractable push rod; when the linear drive member is in a first state, the push rod is extended and maintained in the extended state, and the push rod applies a thrust to the connecting gear set to push the connecting gear set to swing relative to the box body, so that the connecting gear set is meshed with the other of the first transmission gear and the second transmission gear.

2. The refrigerator according to claim 1, characterized in that: The connecting gear set comprises a mounting frame, a first connecting gear and a second connecting gear, wherein the mounting frame is connected to the box body for rotation around a first axis and is used for abutting against the push rod; The first connecting gear is rotatably mounted on the mounting frame, the axis of the first connecting gear coincides with the first axis, and the first connecting gear is meshed with the second transmission gear; The second connecting gear is rotatably mounted on the mounting frame and is in transmission connection with the first connecting gear; when the push rod is extended, it abuts against the mounting frame, and the push rod applies the thrust to the mounting frame, so that the mounting frame drives the first connecting gear and the second connecting gear to rotate relative to the box body, so that the second connecting gear is meshed with the first transmission gear.

3. The refrigerator according to claim 2, characterized in that: In the box body and the mounting frame, one of them is provided with a rotating column, the axis of which is the first axis; the other is provided with a first rotating recessed portion, which is sleeved on the outer side of the rotating column.

4. The refrigerator according to claim 3, characterized in that: The rotating column is arranged on the box body; the first rotating recessed portion is a first rotating through hole, and the first rotating through hole is arranged on the mounting frame; A first connecting protrusion is arranged on the end side of the first connecting gear, the first connecting protrusion is inserted into the rotating through hole, the first connecting protrusion is arranged on the end side of the first connecting gear, and the second rotating recess is sleeved on the outer side of the rotating column.

5. The refrigerator according to any one of claims 2 to 4, characterized in that: In the box body and the mounting frame, one of them is provided with an arc recessed portion, the center of the extension trajectory of the arc recessed portion is located on the first axis; the other is provided with a sliding column, and the sliding column is slidably arranged in the arc recessed portion.

6. The refrigerator according to claim 5, characterized in that: The arc recessed portion is arranged on the box body; the mounting frame is provided with a second rotation through hole, and the second rotation through hole is opposite to the arc recessed portion; A second connecting protrusion is arranged on the end side of the second connecting gear, and the second connecting protrusion is inserted into the second rotating through hole and can rotate in the second rotating through hole; the part of the second connecting protrusion extending out of the second rotating through hole forms the sliding column.

7. The refrigerator according to any one of claims 2 to 4, characterized in that: The mounting frame comprises a connecting plate and two mounting plates, the two mounting plates are arranged opposite to each other and spaced apart, and the two mounting plates are respectively located on both sides of the first connecting gear and the second connecting gear; The connecting plate connects the two mounting plates, and the connecting plate is used to abut against the push rod.

8. The refrigerator according to claim 7, characterized in that: A push block is provided at one end of the push rod facing the connecting gear set; a smoothly connected sliding surface and a contact surface are provided at one side of the push block facing the connecting plate; along the extending direction of the push rod, the sliding surface is inclined toward the center line of the push rod; the contact surface is closer to the connecting plate than the sliding surface; When the push rod is extended, the sliding surface abuts against the edge of the connecting plate and slides along the edge of the connecting plate until the contact surface abuts against the side surface of the connecting plate.

9. The refrigerator according to any one of claims 1 to 4, characterized in that: The automatic door opening and closing device also includes a second elastic member, which connects the box body and the connecting gear set and is used to apply a restoring force opposite to the thrust to the connecting gear set.

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 swingably mounted on the housing, and the connecting gear set is meshed with one of the first transmission gear and the second transmission gear; A clutch mechanism has a push rod that can be selectively extended and maintained in an extended state, and the push rod is used to apply a thrust to the connecting gear set to push the connecting gear set to swing relative to the box body, so that the connecting gear set is meshed with the other of the first transmission gear and the second transmission gear.

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