A refrigerator

Abstract

The application discloses a refrigerator, and belongs to the technical field of electrical equipment. The refrigerator comprises a box body, which is provided with a containing space with an opening; a door body, which is rotatably connected to the box body to close or open the opening; a door rotating mechanism, which is connected to the door body; a driver, which is arranged on the box body; a linkage wheel, which is rotatably arranged on the box body and connected to the driver and the door rotating mechanism, and under the condition that the driver is started, the linkage wheel rotates to drive the door rotating mechanism to rotate the door body; and a hovering device, which comprises a first clamping part arranged on the linkage wheel and a second clamping part arranged on the box body, the linkage wheel rotates to drive the first clamping part to be opposite to and clamped with the second clamping part, so as to brake the door rotating mechanism to rotate the door body. The refrigerator provided by the application has good door opening and closing convenience, and can maintain the opening degree position of the door body.

Description

Technical Field

[0001] This application belongs to the field of electrical equipment technology, and in particular relates to a refrigerator. Background Technology

[0002] With the improvement of living standards, refrigerators, dishwashers, disinfection cabinets, and other electrical appliances have become widely used in people's lives. To maintain the sealing performance of these appliances, a suction structure or a negative pressure system is usually installed between the cabinet and the door to stably fix the door to the cabinet. While this improves the performance of the appliances, it also increases the difficulty of opening the door, often requiring considerable force and causing inconvenience. To address this, a door opening / closing device can be installed to reduce the difficulty of operation. However, to avoid operational interference, once the door reaches the preset opening degree, the opening / closing device will stop outputting driving force. Due to safety measures on the door or uneven ground, the door may rotate towards closing the cabinet, thus failing to maintain the open state, causing inconvenience and even posing certain safety risks. Summary of the Invention

[0003] This application provides a refrigerator designed to at least partially solve the technical problem that the door opening / closing mechanism of an electrical appliance cannot maintain an open state after the appliance has stopped operating. Therefore,

[0004] A refrigerator provided in this application embodiment includes:

[0005] The container has an open storage space.

[0006] A door, which is rotatably connected to the housing to close or open the opening;

[0007] A revolving door mechanism is connected to the door body;

[0008] The driver is mounted on the enclosure;

[0009] A linkage wheel is rotatably mounted on the housing and connected to the driver and the rotating door mechanism. When the driver is activated, the linkage wheel rotates, driving the rotating door mechanism to rotate the door.

[0010] The hovering device includes a first engaging part disposed on the linkage wheel and a second engaging part disposed on the housing. The linkage wheel rotates to drive the first engaging part and the second engaging part to be opposite to and engaged, thereby braking the revolving door mechanism to rotate the door body.

[0011] The refrigerator provided in this application embodiment drives a linkage wheel via a driver to rotate the door mechanism, thereby achieving automatic door opening and closing. Specifically, the linkage wheel rotates in both directions to drive the door mechanism to push and pull the door, achieving door opening and closing. A suspension device is formed by setting a first engaging part on the linkage wheel and a second engaging part on the cabinet body, which serves as a functional structure for braking the linkage wheel. The suspension device tracks the rotation position of the linkage wheel. When the linkage wheel rotates to a state where the first engaging part and the second engaging part are opposite each other, the first engaging part engages with the second engaging part to lock the linkage wheel on the base, thereby braking the linkage wheel and braking the door mechanism connected to the linkage wheel. This achieves door suspension, ensuring the stability of the door opening, reducing the difficulty of opening the door, facilitating use, and reducing the risk of collision.

[0012] In some embodiments, the first engaging portion includes a limiting structure provided on the linkage wheel, and the second engaging portion includes a hovering member and a pushing member;

[0013] The pushing member is disposed on the housing, and the hovering member is movably disposed on the housing, wherein the hovering member is connected to the pushing member, and the hovering member abuts against the linkage wheel;

[0014] When the linkage wheel rotates to a state where the limiting structure is opposite to the second engaging part, the pushing member pushes the hovering member to move so as to abut against the limiting structure.

[0015] In some embodiments, the hovering member has a top abutment portion that abuts against the linkage wheel and is connected to the push member.

[0016] In some embodiments, the hovering member has a push-limiting groove, and the push-up member is disposed in the push-limiting groove.

[0017] In some embodiments, the hovering member has a top abutting part and a connecting part, the top abutting part abutting against the linkage wheel, and the connecting part being connected to the pushing member.

[0018] In some embodiments, the pusher is an elastic member, one end of which is connected to the housing and the other end of which is connected to the suspension member, and is elastically compressed or stretched between the housing and the suspension member.

[0019] In some embodiments, the housing is provided with a hovering limiting groove, the hovering member is slidably embedded in the hovering limiting groove, the elastic member is disposed in the hovering limiting groove, one end of which abuts against the housing and the other end of which abuts against the hovering member.

[0020] In some embodiments, the hovering member is rod-shaped, with the top abutment portion provided at one end.

[0021] In some embodiments, the elastic element is a spring.

[0022] In some embodiments, the limiting structure includes a groove disposed on the circumferential surface of the linkage wheel, and the suspension member abuts against the groove to brake the revolving door mechanism to rotate the door body.

[0023] In some embodiments, the groove is C-shaped or V-shaped.

[0024] In some embodiments, the first engaging portion includes: a hovering portion and a connecting portion, wherein the connecting portion connects the hovering portion and the linkage wheel;

[0025] The second engaging part includes a limiting part disposed on the housing, and a limiting groove is formed on the limiting part. When the hovering part engages with the limiting mechanism, the hovering part is engaged in the limiting groove.

[0026] The linkage wheel rotates to engage the hovering part with the limiting groove, thereby braking the revolving door mechanism to rotate the door body.

[0027] In some embodiments, the second engaging portion further includes a guide portion connected to the limiting portion. When the linkage wheel rotates, the hovering portion moves along the guide portion to guide the hovering portion to engage in the limiting groove.

[0028] In some embodiments, the guide portion includes a guide plane tangent to the circumferential surface of the linkage wheel, the hovering portion moves along the guide plane, and the limiting groove is disposed at one end of the guide plane.

[0029] In some embodiments, the hovering portion includes a snap-fit ​​element that matches the shape of the limiting groove, and the snap-fit ​​element is connected to the connecting portion.

[0030] In some embodiments, the insert is an elastically deformable insert head, and the insert head can deform to fit into or disengage from the slot of the limiting groove.

[0031] In some embodiments, the insert head is a hollow cylindrical component that can be elastically deformed.

[0032] In some embodiments, the connecting portion is an elastically deformable connecting arm.

[0033] In some embodiments, the refrigerator further includes a door-opening mechanism, which is mounted on a linkage wheel and can open the door when the linkage wheel rotates.

[0034] In some embodiments, the top door mechanism includes a top door portion protruding from the linkage wheel, wherein when the linkage wheel rotates, the top door portion extends out of the housing body to open the door.

[0035] In some embodiments, the top door portion has an outer surface that is flush with the sealing surface of the door when the main body is closed.

[0036] In some embodiments, the refrigerator further includes a top door mechanism, the top door mechanism including: a top door member movably disposed on the cabinet body, wherein, when the linkage wheel rotates, a support portion formed on the linkage wheel can rotate with the linkage wheel to push the top door member relative to the cabinet body so that the top door member pushes open the door body.

[0037] In some embodiments, the abutting portion has a top door surface. When the abutting portion rotates with the linkage wheel, the top door surface abuts against the top door member, which can push the top door member to move relative to the housing so that the top door member pushes open the door.

[0038] In some embodiments, the top surface gradually extends away from the rotation center of the linkage wheel.

[0039] In some embodiments, the door opening and closing device further includes an elastic element connected between the base and the top door member. When the top door member is disengaged from the top door surface, the elastic element can drive the top door member to move along the clearance surface, thereby resetting the top door member.

[0040] In some embodiments, the base is provided with a mounting groove, and the top door component is movably disposed within the mounting groove. Attached Figure Description

[0041] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 This invention provides a schematic diagram of the assembly structure of the door opening and closing device in a refrigerator according to an embodiment of this application.

[0043] Figure 2 It shows Figure 1 A schematic diagram of the structure of the door opening and closing device in the hovering condition;

[0044] Figure 3 It shows Figure 1A schematic diagram of the suspension mechanism of the door opening and closing device in the diagram;

[0045] Figure 4 It shows Figure 3 A schematic diagram of the linkage wheel of the door opening and closing device;

[0046] Figure 5 It shows Figure 3 A schematic diagram of the engagement between the suspension component and the pushing component of the door opening and closing device;

[0047] Figure 6 It shows Figure 3 A schematic diagram of the suspension limit slide of the door opening and closing device;

[0048] Figure 7 It shows Figure 3 A schematic diagram showing the fit between the suspension component and the suspension limit groove of the door opening and closing device;

[0049] Figure 8 It shows Figure 3 A schematic diagram of the initial state of the top door mechanism of the door opening and closing device in the middle;

[0050] Figure 9 It shows Figure 3 A schematic diagram of the top door mechanism and top door status of the door opening and closing device;

[0051] Figure 10 It shows Figure 3 A schematic diagram of the initial state of the top door mechanism of the door opening and closing device in the middle;

[0052] Figure 11 It shows Figure 3 A schematic diagram of the top door mechanism of the door opening and closing device in the diagram;

[0053] Figure 12 It shows Figure 3 A schematic diagram of the assembly structure of another type of top door mechanism in the door opening and closing device;

[0054] Figure 13 It shows Figure 12 A schematic diagram of the top door state structure of the top door mechanism of the door opening and closing device;

[0055] Figure 14 It shows Figure 12 A schematic diagram of the suspended state structure of the top door mechanism of the door opening and closing device in the middle;

[0056] Figure 15 It shows Figure 12 A schematic diagram of the linkage wheel of the door opening and closing device;

[0057] Figure 16A schematic diagram of the assembly structure of another refrigerator structure in an embodiment of this application is shown;

[0058] Figure 17 It shows Figure 16 A schematic diagram of the linkage wheel and hovering mechanism of the door opening and closing device;

[0059] Figure 18 It shows Figure 16 A schematic diagram of the limiting mechanism of the door opening and closing device in the diagram;

[0060] Figure 19 It shows Figure 18 A schematic diagram of the initial state of the central door opening and closing device;

[0061] Figure 20 It shows Figure 19 A schematic diagram of the top door state of the suspension mechanism of the central door opening and closing device;

[0062] Figure 21 It shows Figure 19 A schematic diagram of the suspension state of the central door opening and closing device;

[0063] Figure 22 It shows Figure 18 A schematic diagram of the initial state of the top door mechanism of the central door opening and closing device;

[0064] Figure 23 It shows Figure 18 A schematic diagram of the top door state of the top door mechanism of the central opening and closing door device;

[0065] Figure 24 It shows Figure 18 A schematic diagram of the hovering state of the top door mechanism of the central door opening and closing device;

[0066] Figure 25 It shows Figure 18 A schematic diagram of the linkage wheel and hovering mechanism of the central door opening and closing device.

[0067] Figure label:

[0068] 10-Refrigerator, 11-Door opening and closing device, 12-Cabinet, 13-Door

[0069] 300-Linkage wheel, 310-Supporting part, 312-Top door surface, 314-Avoiding surface, 316-Connection point, 320-Limiting structure, 350-Top door part, 351-Top door point, 352-Exterior surface;

[0070] 400 - Rotary door mechanism, 410 - Front linkage, 420 - Rear linkage;

[0071] 500 - Top door mechanism, 510 - Elastic component;

[0072] 600-Hovering device, 610-Hovering component, 611-Top abutment part, 612-Pushing and limiting groove, 620-Pushing component, 630-Hovering mechanism, 631-Connecting part, 632-Hovering part, 633-Reinforcing rib, 640-Limiting mechanism, 641-Guide plane, 642-Limiting part, 643-Limiting groove;

[0073] 900 - Base, 906 - Suspension limiting slide, 907 - Limiting boss, 908 - Support groove, 909 - Boss part, 912 - Mounting groove. Detailed Implementation

[0074] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0075] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity purposes and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials; however, those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0076] This application is described below with reference to the accompanying drawings and specific embodiments:

[0077] See Figure 1 This application provides a refrigerator 10, with a door opening and closing device 11 installed on it to achieve automatic door opening and closing, which improves the automation level of the refrigerator door opening and closing to a certain extent, enhances the convenience of operation, and reduces the difficulty of operation. The door opening and closing device 11 is installed on the cabinet 12 of the appliance and connected to the door 13 of the appliance. By pushing and pulling the door 13 relative to the cabinet 12, the cabinet 12 is deflected, realizing the closing and opening of the cabinet 12, improving the convenience of operation. It can also maintain the opening of the door 13 after reaching a preset opening degree, improving the comfort of use and avoiding the safety risk of collision to the operator caused by the door closing automatically. Generally, the components of the door opening and closing device 11 can be directly set on the cabinet 12, or a base 900 can be set as the supporting foundation of the device, so that only the door opening and closing device 11 is fixed on the cabinet 12 as a whole, thereby realizing the overall assembly.

[0078] The door opening and closing device 11 provided in this application embodiment can automatically open the door 13 after receiving an opening signal, wherein the opening signal can be triggered by the user or by the refrigerator itself. Similarly, the door opening and closing device can automatically close the door 13 after receiving a closing signal, wherein the closing signal can be triggered by the user or by the refrigerator itself.

[0079] In this embodiment, the refrigerator 10 includes a cabinet 12 and a door 13. The cabinet 12 has an open accommodating space, and the door 13, which is rotatably connected to the cabinet 12, can be used to close or open the open space. A door opening / closing device 11 can be installed on the cabinet, and the door opening / closing device 11 is connected to the door 13, thereby automatically pushing and pulling the door 13 to rotate relative to the cabinet 12, thus achieving automatic door opening and closing.

[0080] See Figure 1 and Figure 2 The door opening and closing device 11 includes a revolving door mechanism 400, a driver, and a linkage wheel 300. The linkage wheel 300 is rotatably mounted on the housing 12 and connected to the driver and the revolving door mechanism 400. When the driver is activated, the linkage wheel 300 rotates, driving the revolving door mechanism 400 to rotate the door body 13, thus achieving the door opening and closing operation. In this embodiment, by setting up the revolving door mechanism 400 and the linkage wheel 300, the door body 13 is rotated under the drive of the driver to achieve automatic door opening and closing, reducing the difficulty of manual door opening and improving convenience and comfort.

[0081] When the door rotates to the preset opening position, the drive mechanism will no longer apply driving force, leaving space for manual operation of the door 13 and avoiding interference with manual operation of the door 13. However, the door 13 will also close under the action of its own closing self-locking guiding force, thus failing to maintain the opening of the door 13, making it inconvenient to use, and may even cause a safety risk of collision to the operator.

[0082] See Figure 3 and Figure 4 To solve the problem that the door 13 cannot maintain its opening degree when the door opening and closing device stops, a limiting structure 320 can be provided on the linkage wheel 300, and a suspension device 600 can be provided on the base 900. When the linkage wheel 300 rotates to a certain position so that the limiting structure 320 and the suspension device 600 are in a relative state, the suspension device 600 moves and then abuts against the limiting structure 320, locking the linkage wheel 300 on the base 900, thereby braking the door mechanism 400 to rotate the door, so as to achieve door suspension and maintain the preset opening degree position.

[0083] In other words, the limiting structure 320 rotates with the linkage wheel 300, and the hovering device 600 can move relative to the base 900. It can also change its movement state in response to the rotation of the linkage wheel 300. So when the limiting structure 320 rotates to a position that matches the hovering device 600, the hovering device 600 can abut against and lock the limiting structure 320, thereby locking the linkage wheel 300 and restricting its rotation, thereby braking the turntable mechanism 400 to prevent the door body 13 from deflecting, thus keeping the door body 13 hovering in the preset position.

[0084] It is worth noting that the top-stop locking state of the hovering device 600 and the limiting structure 320 is reversible. When the external driving force on the linkage wheel 300 is greater than the braking force between the hovering device 600 and the limiting structure 320, the linkage wheel 300 breaks through the top-stop limiting effect and continues to rotate. The linkage wheel 300 is released from the braking state and can drive the revolving door mechanism 400 to rotate the door body 13 to close, or it can further expand the door opening.

[0085] See Figure 3 and Figure 5 In some embodiments, the hovering device 600 may include a hovering member 610 and a pushing member 620. The hovering member 610 is movably mounted on the base 900 and continuously abuts against the linkage wheel 300. It can also match and abut against the locking structure 320. Thus, when the linkage wheel 300 is in a state where the locking structure 320 is opposite to the hovering member 610, the hovering member 610 can move towards the linkage wheel 300 and abut against the locking structure 320, locking the linkage wheel 300 on the base 900 and braking the linkage wheel 300. The pushing member 620, as the driving element of the hovering member 610, continuously provides a pushing force to the hovering member 610, pushing the hovering member 610 towards the linkage wheel 300, thereby achieving the pushing and resisting action of the linkage wheel 300 by the locking structure 320.

[0086] It should be noted that under the continuous pushing force, the hovering component 610 always maintains a contacting state with the linkage wheel 300. During the rotation of the linkage wheel 300, the hovering component 610 slides on it. Only when the linkage wheel 300 rotates to a state where the limiting structure 320 is opposite to the hovering device 600, under the action of the pushing force, the hovering component 610 moves and abuts against the limiting structure 320, braking the linkage wheel 300. Through the continuous pushing force, the hovering component 610 can track the rotational position of the linkage wheel 300, responding promptly to the positioning state of the limiting structure 320; that is, after the limiting structure 320 and the hovering device 600 are aligned, the hovering component 610 immediately abuts and locks against the limiting structure 320. A resisting part 611 can be provided on the hovering component 610 for contacting and resisting the limiting structure 320, and specifically, it can abut into the interior of the limiting structure 320 to achieve contact and resisting action.

[0087] See Figure 3 and Figure 4 In some embodiments, the limiting structure 320 may be configured as a groove on the circumferential surface of the linkage wheel 300. Correspondingly, the top abutment 611 of the suspension member 610 may be configured to match the groove shape, and ensure that the top abutment 611 can be engaged into and disengaged from the groove, so that the top abutment 611 can smoothly engage and disengage for braking and release.

[0088] It is worth noting that the groove opening can be provided with a connecting surface for smoothly connecting the circumferential surface of the linkage wheel 300, so that the top abutment 611 can smoothly slide into the groove and smoothly disengage from the groove relative to the circumferential surface of the linkage wheel 300, thereby achieving smooth and stable braking and de-braking.

[0089] In some embodiments, the groove can be C-shaped or V-shaped, and correspondingly, the top abutment 611 can be configured as an insertable arc-shaped or spire-shaped structure.

[0090] In order to facilitate the smooth disengagement of the top abutment 611 from the groove, a certain gap can be left between the top abutment 611 and the groove. That is, when the top abutment 611 is inserted into the groove, part of the top abutment 611 abuts against the inner wall of the groove, and another part of the top abutment 611 forms a gap with the groove wall. Under the premise of ensuring tightness, it is also convenient for the top abutment 611 to be smoothly disengaged when subjected to a slightly greater pushing force.

[0091] See Figure 3 and Figure 7 In some embodiments, considering that the stability of the pushing force and its effect has a positive effect on the braking performance of the abutment 611, a pushing limiting groove 612 can be formed on the hovering member 610, and the pushing member 620 can be placed in the pushing limiting groove 612 to maintain a relatively stable connection between the pushing member 620 and the hovering member 610. This can reduce the amplitude of relative swing between the two to a certain extent, thereby maintaining the stability of the force direction, movement direction of the abutment 611, and the contact area between the abutment 611 and the limiting structure 320, and ensuring the braking effect. On the other hand, the pushing member 620 can also be directly connected to the pushing member 611, concentrating the point of application of the pushing force on the pushing member 611, thereby reducing the risk of directional deviation of the pushing force and instability of the abutment effect caused by the attitude change of the hovering member 610 itself.

[0092] It is worth noting that the size and specifications of the push-limiting groove 612 and the push-pull component 620 can be matched, so that the specifications of the push-limiting groove 612 can be slightly larger than the width of the push-pull component 620, thereby reducing the space for relative swing and maintaining the stability of the direction of the push force.

[0093] In some embodiments, the push-up limiting groove 612 can be configured as a blind hole along the direction of the push-up force and capable of accommodating the push-up member 620. The bottom of the hole is disposed on the push-up top 611 to form a circumferential limit on the push-up member 620, thereby limiting the circumferential swing amplitude, reducing the risk of the hovering member 610 bouncing under force, and ensuring the stability of the push-up position and attitude.

[0094] In some embodiments, one end of the hovering member 610 is provided with a top abutment portion 611 for contacting the top abutment limiting structure 320, and the other end of the hovering member 610 may also be provided with a connecting portion for connecting the pusher member 620, thereby facilitating the forming and processing of the hovering member and simplifying the process flow.

[0095] In some embodiments, the pusher 620 can be configured as an elastic element, thereby applying a continuous and consistent pushing force through the elastic deformation of the elastic element. This ensures that the hovering element 610 responds efficiently to changes in the rotational position of the linkage wheel 300 with a simple structure, and can quickly push into the limiting structure 320 when it is in place. At the same time, the stability of the elastic deformation of the elastic element allows the pushing force applied to the hovering element 610 to remain stable. On the one hand, this maintains the stability of the hovering state, and on the other hand, it allows the linkage wheel 300 to rotate and release the braking state under the action of a relatively stable and controllable driving force. This achieves the stability, reliability, and smooth performance of the hovering function of the door opening and closing device 11.

[0096] Given that the deformation of elastic components can be divided into compressive deformation and tensile deformation, the assembly method of elastic components should be set based on the principle of relatively stable and linear deformation state.

[0097] When the elastic element provides elastic pushing force in a compressed state, the suspension element 610 can be placed between the elastic element and the circumferential surface of the linkage wheel 300, and the elastic element is compressed and arranged between the base 900 and the suspension element 610, while keeping the deformation reset direction consistent with the pushing force direction, thereby converting the elastic pushing force of the elastic element into a stable elastic pushing force output.

[0098] When the elastic element provides an elastic pushing force in a stretched state, the elastic element can be stretched and set between the base 900 and the suspension element 610, and the deformation reset direction is consistent with the pushing force direction, thereby converting the elastic tension of the elastic element into a stable elastic pushing force output.

[0099] In some embodiments, the elastic element is a spring, specifically a compression spring or a tension spring, to provide a stable pushing force through compression or tension deformation. Specifically, a compression spring can be compressed between the hovering element and the base, or a tension spring can be stretched between the hovering element and the base.

[0100] See Figure 6 and Figure 7Specifically, the first end of the compression spring can be pressed against the pusher 611, and a boss 909 of approximately the same height as the spring can be provided on the base 900. The second end of the spring can be pressed against the boss 909 to maintain the straight posture of the compression spring in its axial direction, so as to form a stable and reliable pushing force.

[0101] Specifically, the first end of the tension spring can be fixed to the main body of the pusher 620 or directly to the pusher 611, and the second end of the tension spring can be fixed to the boss 909 provided on the base 900. The tension spring should be as flat as possible with the plate surface of the base 900 and kept in a straight position to form a stable and reliable pushing force.

[0102] In some embodiments, a support groove 908 may be provided below the boss portion 909 to limit and support the spring, thereby ensuring the stability of its top position and preventing wobbling.

[0103] In some embodiments, elastic elements such as torsion springs or leaf springs may also be used, as long as the direction of the elastic force roughly matches the direction of movement of the suspension element 610, which will not be elaborated here.

[0104] In some embodiments, in order to maintain the stability of the movement direction of the hovering member 610 and limit excessive swaying and vibration, a hovering limiting groove 906 can be provided on the base 900, and the hovering member can be placed in the hovering limiting groove 906. Through the guiding and constraining effect of the sidewall of the groove, the movement direction of the hovering member 610 can be kept stable, thereby ensuring the reliability of braking performance.

[0105] See Figure 6 In some embodiments, the hovering limiting groove 906 can be configured as two opposing limiting bosses 907, and the limiting bosses 907 have a certain length in the moving direction of the hovering member 610, which is sufficient to satisfy the limiting within the sliding stroke. An upper limit structure can also be connected to the top of the two limiting bosses 907, which can to some extent restrict their detachment from the base; a corresponding upper limit structure can also be provided on the base cover, opposite to the hovering limiting groove 906, thereby achieving the purpose of upper limit positioning, ensuring that the hovering member 610 can always move in a stable direction, and guaranteeing the reliability of braking performance.

[0106] In some embodiments, to maintain the stability of the moving direction of the hovering member 610 and limit unstable swaying, the hovering member can be configured as a rod, with the top abutment 611 located at one end near the linkage wheel 300; that is, a long strip-shaped structural member with a certain length, which, together with the hovering limiting groove 906, achieves stable sliding. Utilizing its length characteristics and the radial limiting effect of the hovering limiting groove 906 on the long strip-shaped structural member, the swaying amplitude is reduced to a certain extent. Generally speaking, the longer the hovering limiting groove 906 and the rod-shaped hovering member 610 are in the pushing force direction, the better the performance in limiting the swaying amplitude, and the more stable the moving direction of the hovering member 610.

[0107] See Figure 16 , Figure 17 and Figure 18 In some embodiments, to address the problem that the door 13 cannot maintain its opening degree when the door opening and closing device stops, another hovering device 600 can be used. Specifically, a hovering mechanism 630 can be set on the linkage wheel 300, and a limiting mechanism 640 can be set on the base 900. When the linkage wheel 300 rotates, the limiting mechanism 630 rotates accordingly. Thus, when the linkage wheel 300 rotates to the preset door opening position, the hovering mechanism 630 can engage with the limiting mechanism 640, thereby locking the linkage wheel 300 on the base 900, thereby braking the door mechanism 400 to rotate the door 13, so as to achieve door 13 hovering and maintaining the current preset opening degree.

[0108] See Figure 16 , Figure 17 , Figure 18 and Figure 25 The limiting mechanism 630 may be provided with a connecting part 631 and a hovering part 632. The hovering part 632 is connected to the linkage wheel 300 through the connecting part 631, so that the hovering part 632 can rotate with the linkage wheel 300.

[0109] The hovering part 632 serves as a functional part that engages with the limiting mechanism 640. Its shape can match the limiting mechanism 640, so that when the hovering part 632 and the limiting mechanism 640 are aligned, they can engage smoothly and form a certain degree of disengagement resistance, namely the braking force of the linkage wheel 300, thereby locking the linkage wheel 300 on the base 900.

[0110] It is worth noting that the engagement state between the hovering part 632 and the limiting mechanism 640 is reversible. When the external driving force on the linkage wheel 300 is greater than the braking force between the hovering part 632 and the limiting mechanism 640, the linkage wheel 300 transmits the external driving force to the connecting part 631, forcing the hovering part 632 to disengage from the limiting mechanism 640. The linkage wheel 300 continues to rotate, and the linkage wheel 300 is released from the braking state, which can drive the revolving door mechanism 400 to rotate and close the door body 13, or it can further expand the door opening.

[0111] In some embodiments, the limiting mechanism 640 may be configured as a limiting portion 642 located on the base 900, used to contact the limiting hovering portion 632 to form a certain moving resistance, thereby braking the linkage wheel. Furthermore, a limiting groove may be specifically formed on the limiting portion 642, so that when the hovering portion 632 rotates to the limiting groove, it can naturally engage within the limiting groove, thereby restricting the hovering portion 632 from disengaging by accommodating or partially accommodating it, thus forming a braking force.

[0112] In some embodiments, in order to generate a stable braking force for the linkage wheel 300, the hovering part 632 can be configured as an independent insert, and the shape of the insert can be configured to match the groove shape of the limiting groove. This allows a larger engagement contact surface to be formed when the insert rotates to the position of the limiting groove, thereby increasing the frictional resistance to disengagement and generating a relatively stable braking force. This facilitates good matching of the driving force of the linkage wheel 300, forming a smooth and stable driving and braking control mode for the linkage wheel 300, and ensuring the operational stability and reliability of the door opening and closing device.

[0113] In some embodiments, the insert can be configured as an elastically deformable element, thereby forming a certain elastic contact pressure when the insert engages with the groove of the limiting groove, thereby increasing the braking force. In particular, when disengaging from the limiting groove, further deformation is required to disengage from the groove opening, thereby forming a stable and reliable braking force.

[0114] It is worth noting that since the insert follows the rotation of the linkage wheel 300, its movement trajectory is arc-shaped. The limiting groove can be set on the arc-shaped trajectory of the insert and biased towards the center of the linkage wheel 300. Thus, when the insert rotates to the position of the limiting groove, it needs to undergo a certain deformation to be inserted into the limiting groove, and correspondingly, it also needs to undergo a certain deformation to be released from the limiting groove, which facilitates the formation of stable braking force.

[0115] In some embodiments, the insert can be configured as a hollow cylindrical part, and the groove of the limiting groove can also be configured to adapt to the cylindrical circumferential surface of the hollow cylindrical part. Thus, the deformation direction of the hollow cylindrical part is mainly the radial direction of the hole cylindrical part, and the deformation area is the circumferential area of ​​the hollow cylindrical part in the length direction, thereby achieving regionalized stable deformation and ensuring stable braking force.

[0116] In some embodiments, the hollow cylindrical component may be made of rubber or other materials with stable elastic deformation properties. The specific elastic coefficient can be matched with the arrangement of the limiting groove and the suspension component, and comprehensively set to ensure smooth engagement and disengagement operations and reduce vibration amplitude.

[0117] In some embodiments, the insert can be integrally formed with the connecting part, thereby facilitating the processing of parts and improving assembly efficiency. The connecting part can be fixed to the linkage wheel 300 by a fixed connecting mechanism, or it can be integrally formed on the linkage wheel 300.

[0118] In other embodiments, the insert can also be connected to the connecting part via a fixed connection structure, allowing for easy disassembly and replacement. Accordingly, the connecting part 631 can be integrally formed with the linkage wheel 300 for easy overall assembly; or it can be fixed to the linkage wheel 300 via a fixed connection structure, thereby enriching the connection methods and facilitating maintenance and replacement.

[0119] In some embodiments, in order to achieve smooth hovering operation, a guide portion 641 connected to the limit portion 642 can be provided on one side. During the rotation of the linkage wheel, the hovering portion can contact and move along the guide portion 641. The guide portion 641 can achieve buffering and guidance to guide the hovering portion to smoothly engage in the limit groove, and avoid the hovering portion from failing to stably engage and fall into the limit groove due to inertia.

[0120] In some embodiments, the guide portion 641 may be configured as a guide plane tangent to the circumferential surface of the linkage wheel 300, and a limiting groove is provided at one end of the guide plane, so that the hovering portion 632 contacts and moves along the guide plane and directly falls into the limiting groove.

[0121] It is worth noting that the point of tangency between the guide plane and the arc trajectory of the hovering part 632 can be set at the opening of the limiting groove. When the hovering part 632 just contacts the guide plane, it forms a certain contact pressure and immediately engages in the limiting groove. When the linkage wheel 300 is released from the braking state, it is necessary to break through this contact pressure to form a stable thrust, so that the drive components of the linkage wheel 300 can match and achieve stable drive control operation.

[0122] In some embodiments, the connecting part 631 may also be configured as an elastically deformable connecting arm, so that the suspension part 632 can be smoothly and stably engaged in the limiting groove through the elastic deformation of the connecting arm, and can be disengaged from the limiting groove under a stable pressure, thereby realizing smooth braking and release operation.

[0123] To ensure the reliability of the hovering mechanism 630, the length of the connecting arm should not be too large to avoid excessive deformation, which could affect the stress state of the hovering part, causing it to be unable to stably engage in the limiting groove, or to easily disengage from the limiting groove, thus degrading the braking effect.

[0124] In some embodiments, a reinforcing rib 633 may be provided between the connecting arm and the linkage wheel 300 to strengthen the connection and limit the excessive deformation of the connecting arm to a certain extent.

[0125] In some embodiments, the connecting part can be formed by molding composite materials, and the connecting part 631 can be configured with a structure of gradually changing hardness and elasticity, so as to take into account both stable elastic deformation and reliable structural strength and morphological stability, and ensure the stress stability and braking effect of the hovering part 632.

[0126] In some embodiments, the door opening and closing device is further provided with a door-pushing mechanism for overcoming the negative pressure adsorption and other adsorption forces between the door body 13 and the housing 12. The door-pushing mechanism is provided on the linkage wheel 300. As the linkage wheel 300 rotates to push the door body 13, after overcoming the adsorption force, the door-turning mechanism 400 continues to rotate the door body to realize the relay door opening operation.

[0127] The rotating door mechanism 400, the top door mechanism, and the hovering mechanism 630 are all directly connected to the linkage wheel 300. In order to reduce interference between the various structures, the rotating door mechanism 400 and the hovering mechanism 630 can be arranged on opposite sides of the top door mechanism. Thus, after the top door mechanism opens the door first, the rotating door mechanism 400 and the hovering mechanism 630 can independently perform the rotating door and hovering braking operations at a certain distance relative to each other, without interfering with each other, achieving spatial harmony and compatibility, and ensuring smooth and stable operation.

[0128] See Figure 1 , Figure 12 , Figure 16 and Figure 22 In some embodiments, the door opening and closing device is also provided with a door-pushing mechanism 500 for overcoming the negative pressure adsorption and other adsorption forces between the door body 13 and the box body 12. The door-pushing mechanism 500 is set on the linkage wheel 300. As the linkage wheel 300 rotates to push the door body 13, after overcoming the adsorption force, the door-turning mechanism 400 continues to rotate the door body 13 to realize the relay door opening operation.

[0129] That is, this application provides two implementations of the top door mechanism 500, and there are also two implementations of the hovering device 600. Therefore, the combination of the hovering device 600 and the top door mechanism 500 can be divided into four types. The implementation scheme of the hovering device 600 has been described above, and the two top door mechanisms 500 will be described below.

[0130] See Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 17 , Figure 19 , Figure 20 and Figure 21In some embodiments, the top door mechanism 500 may include a top door member, which is movably mounted on the base 900. The linkage wheel 300 has a supporting part 310. When the driving device drives the linkage wheel 300 to rotate, the supporting part 310 can rotate with the linkage wheel 300 and push the top door member to move relative to the base 900 so that the top door member opens the door body 13.

[0131] In this embodiment, to improve the sealing effect when the door 13 is closed on the main body 12, a relatively large pressure is usually applied to press the door 13 onto the main body 12, or the door 13 is adsorbed onto the main body 12 through an adsorption structure. There is a large adsorption force between the door 13 and the main body 12, requiring a large force to disengage the door 13 from the main body 12 when the door 13 is opened. A supporting part 310 is provided on the linkage wheel 300. When the linkage wheel 300 rotates, the supporting part 310 can push the top door component to move relative to the main body 12, thereby opening the door 13. By having the supporting part 310 on the linkage wheel 300 directly interact with the top door component, the door 13 can be directly opened. Alternatively, a single drive structure can drive the linkage wheel 300 to rotate, thereby opening the door 13. This reduces the number of components in the entire door opening and closing device and improves the overall integration of the device.

[0132] When the linkage wheel 300 rotates, the top door member cannot rotate with the linkage wheel 300. Under the action of the abutment part 310, the top door member can move towards or away from the door body 13, thereby opening the door body 13. The top door member can fit against the outer surface of the abutment part 310. During the rotation of the linkage wheel 300, the shape of the top door member on the outer surface of the abutment part 310 moves, moving towards or away from the door body 13 to open the door body 13.

[0133] In other words, in this embodiment, there is no direct connection between the top door member and the abutment part 310. The top door member may or may not be in contact with the abutment part 310. When the drive structure drives the linkage wheel 300 to rotate, the top door member can abut against the abutment part 310 and push the top door member to move closer to the door body 13 through the abutment part 310, so as to open the door body 13.

[0134] In other words, in this embodiment, the supporting part 310 rotates with the linkage wheel 300, while the top door component moves in a straight line.

[0135] For ease of description, the direction of rotation of the linkage wheel 300 that enables the door 13 to open is defined as forward rotation. If the door opening and closing device receives an opening signal, the drive structure drives the linkage wheel 300 to rotate forward, and the door mechanism 400 can follow the forward rotation of the linkage wheel 300, thereby opening the door 13. If the door opening and closing device receives a closing signal, the drive structure drives the linkage wheel 300 to rotate in reverse, and the door mechanism 400 can follow the reverse rotation of the linkage wheel 300, thereby closing the door 13.

[0136] See Figure 17 In some embodiments, the abutment portion 310 has a top door surface 312. When the abutment portion 310 rotates with the linkage wheel 300, the top door surface 312 abuts against the top door member, which can push the top door member to move relative to the base 900 so that the top door member opens the door body 13.

[0137] The top door surface 312 can be set on one side of the supporting part 310. As the supporting part 310 rotates with the linkage wheel 300, the top door surface 312 abuts against the top door member, causing the top door member to move towards the door body 13. The top door member gradually extends out of the door body 13. As the linkage wheel 300 rotates, more and more of the top door member extends out of the main body 12, thereby gradually opening the door body 13.

[0138] In some embodiments, the abutment 310 protrudes from the linkage wheel 300, and the distances from the center of the linkage wheel 300 to various parts of the top door surface 312 are different. Since the distances from various parts of the top door surface 312 to the rotation center of the linkage wheel 300 are different, during the rotation of the linkage wheel 300, the top door surface 312 moves towards the door body 13 to abut the top door member, so that the top door member gradually pushes open the door body 13.

[0139] In some embodiments, the top door surface 312 gradually extends away from the rotation center of the linkage wheel 300; it can be understood that the top door surface 312 is inclined. When the door body 13 is closed on the main body 12, the top door member is located at the connection between the top door surface 312 and the linkage wheel 300. Since the top door surface 312 protrudes away from the rotation center of the linkage wheel 300 and is inclined, when the linkage wheel 300 rotates under the drive of the drive structure, the top door surface 312 will resist the top door member and move towards the door body 13, so that the top door member gradually extends out of the main body 12, thereby opening the door body 13.

[0140] It is easy to understand that the angle at which the top door component opens the door body 13 is related to the distance between the top door surface 312 and the rotation center of the linkage wheel 300. For ease of description, the point on the top door surface 312 with the furthest rotation center of the linkage wheel 300 is defined as the connection point 316. The greater the distance between the connection point 316 and the rotation center of the linkage wheel 300, the longer the top door component extends, and the greater the opening angle of the door body 13.

[0141] In some embodiments, the top door member can open the door body 13 at an angle of 3 to 5 degrees, and the specific angle can be flexibly set according to the angle required to overcome the opening resistance of the door body 13.

[0142] During the process of the top door surface 312 pressing against the door body 13, the door body 13 may have already been opened at the middle position of the top door surface 312. During the continued rotation, the door body 13 can be opened at a small angle, so that the door mechanism 400 can continue to open the door body 13.

[0143] In some embodiments, the supporting part 310 further includes a relief surface 314, which is connected to the top door surface 312. After the top door member is disengaged from the top door surface 312, the top door member can be reset along with the relief surface 314.

[0144] In the direction of the forward rotation of the linkage wheel 300, the top door surface 312 is positioned in front of the clearance surface 314. That is, during the rotation of the linkage wheel 300, the top door surface 312 first contacts the top door component, pushing the top door component to move closer to the door body 13. After the top door component disengages from the top door surface 312, the top door component contacts the clearance surface 314, enabling the top door component to move away from the door body 13. After the top door component pushes open the door body 13, it can retract onto the main body 12 for convenient subsequent closing.

[0145] It is easy to understand that if the linkage wheel 300 is not provided with a clearance surface 314, after the top door member opens the door body 13, the top door member will always extend outside the door body 13. When it is necessary to close the door body 13, the top door member will be located outside the main body 12 and will interfere with the door body 13, causing the door body 13 to be unable to close. Therefore, the main purpose of providing a clearance surface 314 is to provide space for the top door member to retract onto the main body 12 after opening the door body 13, so that the top door member can retract onto the main body 12 after opening the door body 13, thus preventing the door body 13 from being unable to retract.

[0146] Of course, after the top door surface 312 pushes the top door component to the outside of the main body 12, when the clearance surface 314 rotates to the rear of the top door component, the top door component cannot automatically return to its original position and cannot automatically follow the clearance surface 314 to retract onto the main body 12. An elastic element 510 can be set on the base 900 and the top door component, and the top door component can be retracted onto the main body 12 by the restoring force of the elastic element 510.

[0147] During the process of the top door surface 312 abutting against the top door component, the elastic element 510 gradually deforms. When the connection point 316 contacts the top door component, the deformation of the elastic element 510 reaches its maximum. As the drive structure drives the linkage wheel 300 to continue rotating, the top door component disengages from the top door surface 312. After disengagement, the clearance surface 314 provides space for the top door component to be retracted onto the main body 12. Under the restoring force of the elastic element 510, the top door component moves away from the door body 13, so that the entire top door component can be retracted onto the main body 12, facilitating the closing of the door body 13.

[0148] In some embodiments, the elastic element 510 may be a spring or a torsion spring, either one may be chosen.

[0149] With the elastic element 510 being a spring, one end of the spring is connected to the top door component, and the other end can be fixed to the base 900, or to the connecting shaft of the linkage wheel 300. The shaft is fixedly connected to the base 900. In other words, the part of the spring furthest from the top door component only needs to be connected to the fixed structure.

[0150] If the elastic element 510 is a spring, the spring is gradually stretched during the process of the top door surface 312 abutting against the top door component. When the connection point 316 contacts the top door component, the spring stretch reaches its maximum. During the process of the drive structure driving the linkage wheel 300 to continue rotating, the top door component disengages from the top door surface 312. After disengagement, the clearance surface 314 provides space for the top door component to be retracted onto the main body 12. Under the restoring force of the spring, the top door component moves away from the door body 13, so that the entire top door component can be retracted onto the main body 12, facilitating the closing of the door body 13.

[0151] When the spring is a torsion spring, the middle part and the first end of the torsion spring are set on the base 900, and the second end of the torsion spring is connected to the top door component. The middle part is connected to the first end and the second end respectively. When the top door component opens the door body 13, the top door component needs to overcome the torsion force of the torsion spring.

[0152] If the elastic element 510 is a torsion spring, under the condition that the top door surface 312 moves towards the door body 13 while abutting the top door component, the torsion spring is torn. When the top door component and the top door surface 312 are no longer abutting, under the restoring force of the torsion spring, the top door component can follow the clearance surface 314 to move away from the door body 13, so that the top door component can be reset, avoiding interference between the top door component and the door body 13, and facilitating closing the door.

[0153] In some embodiments, the top door surface 312 and the clearance surface 314 are connected at the connection point 316, and the distance between the connection point 316 and the rotation center of the linkage wheel 300 is greater than the distance between any point on the clearance surface 314 and the top door surface 312 and the rotation center of the linkage wheel 300.

[0154] The top door surface 312 and the clearance surface 314 are interconnected. The point where they are connected can be defined as the connection point 316. The connection point 316 is the point on the top door surface 312 and the clearance surface 314 that is farthest from the rotation center of the linkage wheel 300. Under the condition that the connection point 316 and the top door component are abutting, the top door component opens the door body 13 to the farthest angle. After the clearance surface 314 rotates the top door component, the clearance surface 314 provides the top door component with space to move away from the door body 13, so that the top door component can be retracted onto the main body 12 for convenient subsequent closing.

[0155] It is easy to understand that as the top door surface 312 pushes against the top door component, the door body 13 gradually opens. It is not that the top door component only opens the door body 13 when the connection point 316 contacts the top door component. As the top door surface 312 rotates with the linkage wheel 300, it is possible that the top door component pushes open the door body 13 when one of the points on the top door surface 312 pushes against the top door component. It is only when the connection point 316 and the top door component push against each other that the opening of the door body 13 reaches its maximum angle during the door-pushing stage.

[0156] The speed at which the top door assembly opens the door is related to the rotation speed of the drive linkage wheel 300. The faster the linkage wheel 300 rotates, the faster the top door assembly opens the door body 13. Conversely, the slower the linkage wheel 300 rotates, the slower the top door assembly opens the door body 13.

[0157] In some embodiments, the clearance surface 314 and the top door surface 312 can be curved surfaces or inclined planes.

[0158] It should be noted that in some embodiments, one end of the revolving door mechanism 400 is connected to the linkage wheel 300 and the other end is connected to the door body 13. The top door component and the revolving door mechanism 400 can be driven by the same drive structure and the linkage wheel 300 to realize the functions of opening and closing the door. Specifically, the top door component first opens the door body 13 to a small angle, and then the revolving door mechanism 400 further opens the door body 13.

[0159] During the rotation of the linkage wheel 300, the suspension mechanism 630 engages with the limiting mechanism 640, which can stop the linkage wheel 300 from rotating, preventing the revolving door mechanism 400 from further opening the door body 13, and allowing the door body 13 to stop rotating relative to the main body 12.

[0160] See Figure 11 In this embodiment, the base 900 is provided with a mounting groove 912, and the top door component is movably disposed in the mounting groove 912. The mounting groove 912 is elongated, and the top door component is disposed in the mounting groove 912 and can move along the extension direction of the mounting groove 912, so that the top door component can move towards or away from the door body 13.

[0161] The mounting groove 912 extends from the linkage wheel 300 to the door body 13. In order to reduce the loss of the door-pushing force when the door is closed, the mounting groove 912 can be perpendicular to the door body 13.

[0162] In some embodiments, the abutment 310 and the linkage wheel 300 are integrally formed. This integral forming means that the linkage wheel 300 directly interacts with the top door component, reducing the need for other components and simplifying the structure of the door opening / closing device 11, thereby reducing the space occupied.

[0163] In addition, the linkage wheel 300 rotates under the drive of the drive structure. With the setting of the abutment part 310, the rotation can be converted into the movement of the top door component. The linkage wheel 300 can realize the top door before opening, which improves the application range of the linkage wheel 300, reduces the drive structure of the top door component, thereby reducing the structure of the door opening and closing device 11 and reducing the space occupied.

[0164] In summary, the door opening and closing device 11 provided in this application typically uses significant pressure to press the door 13 onto the main body 12 when the door 13 is closed to improve the sealing effect, or it is adsorbed onto the main body 12 using an adsorption structure. The door 13 and the main body 12 have a strong adsorption force, requiring a large force to disengage them when opening the door 13. By providing a supporting part 310 on the linkage wheel 300, the supporting part 310 can push the top door member to move relative to the main body 12 when the linkage wheel 300 rotates, thereby opening the door 13. The supporting part 310 directly interacts with the top door member, directly opening the door 13. In other words, a single driving structure can drive the linkage wheel 300 to rotate, thereby opening the door 13. This reduces the number of components in the entire door opening and closing device 11 and improves the overall integration of the device.

[0165] See Figure 12 , Figure 13 , Figure 14 , Figure 15 , Figure 22 , Figure 23 , Figure 24 and Figure 25 In some embodiments, the top door mechanism may also be configured as a top door portion 350 protruding from the linkage wheel 300. When the linkage wheel 300 rotates, the top door portion 350 extends out of the base 900 to directly overcome the opening resistance such as the suction force of the door body 13 and open the door body 13, so as to facilitate the door mechanism 400 to rotate the door body 13, thereby reducing the difficulty of opening the door to a certain extent.

[0166] It is worth noting that the top door portion 350 opening the door body 13 mentioned in this application means that when the door body 13 is closed to the main body 12, that is, when the door body 13 is attached to the main body 12, the top door portion 350 rotates according to the linkage wheel 300. During the rotation of the top door portion 350, the top door portion 350 gradually interacts with the door body 13, causing the door body 13 and the main body 12 to detach from the attachment, thereby opening the door body 13.

[0167] In some embodiments, the top door portion 350 has a top door point 351. When the drive mechanism drives the linkage wheel 300 to rotate, the top door point 351 abuts against the door body 13 to open the door body 13.

[0168] As the drive mechanism drives the linkage wheel 300 to rotate, the top door portion 350 gradually comes into contact with the door body 13. Under the condition that the drive mechanism continues to drive the linkage wheel 300 to rotate, the top door portion 350 extends out of the main body 12, causing the top door point 351 to open the door body 13.

[0169] Among them, the top door point 351 is the point on the top door part 350 that is farthest from the rotation center of the linkage wheel 300. During the process of the drive mechanism driving the linkage wheel 300 to rotate, the top door part 350 rotates with the linkage wheel 300. The top door point 351 can push the door body 13 to the farthest distance that the top door part 350 can push the door body 13 to.

[0170] In some embodiments, the top door portion 350 has an outer surface 352, and a top door point 351 is disposed at one end of the outer surface 352.

[0171] Among them, the outer surface 352 is a plane, and the top point is set at one end of the outer surface 352. During the process of the drive mechanism driving the linkage wheel 300 to rotate, a part of the outer surface 352 rotates to the main body 12, and another part rotates to the outside of the main body 12. The part outside the main body 12 gradually abuts against the door body 13 until the top door point 351 abuts against the door body 13, thus opening the door body 13.

[0172] It is easy to understand that as the outer surface 352 rotates with the linkage wheel 300, the part of the outer surface 352 extending out of the main body 12 gradually abuts against the door body 13. During the rotation, more and more of the outer surface 352 extends out, increasing the abutting force against the door body 13, so that the door body 13 can overcome the adsorption force between itself and the main body 12, thereby opening the door body 13.

[0173] When the door 13 is closed, the outer surface 352 is flush with the opening of the main body 12. During the process of the drive mechanism driving the linkage wheel 300 to rotate, the top door point 351 can quickly rotate to the outside of the main body 12, so that the top door point 351 can quickly push open the door 13.

[0174] In addition, with the door 13 closed, the fact that the exterior surface 352 is flush with the opening of the main body 12 ensures the aesthetic appearance when the door opening and closing device 11 is not activated.

[0175] In summary, the door opening and closing device provided in this application embodiment achieves door rotation through the cooperation of a rotating door mechanism and a drive mechanism, realizing automatic door opening and closing. Specifically, the rotating door mechanism is driven to rotate forward and backward by a linkage wheel to achieve door opening and closing. A limit structure is set on the linkage wheel as a functional structure for braking the linkage wheel. The second engaging part is slidably set on the base to track the rotation position of the linkage wheel. When the linkage wheel rotates to the state where the limit structure is opposite to the second engaging part, the second engaging part abuts against the limit structure to brake the linkage wheel, thereby braking the rotating door mechanism connected to the linkage wheel, thus achieving door suspension, ensuring the stability of the door opening, reducing the difficulty of opening the door, facilitating use, and reducing the risk of collision.

[0176] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0177] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0178] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. In this application, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction relationship between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances. In addition, the descriptions involving "first," "second," etc., in this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more of the aforementioned features. In the description of this application, "multiple" means two or more, unless otherwise explicitly and specifically limited.

[0179] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0180] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0181] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A refrigerator characterized by comprising: The utility model relates to a cabinet door opening and closing device, including: Box, open the containing space with the open mouth; Door body, the door body is rotatably connected on the box to close or open the open mouth; Door turning mechanism, with the door body connection; Driver, set up on the box; Linkage wheel, rotatably set up on the box and with the driver and the door turning mechanism connection, under the condition that the driver starts, the linkage wheel rotates, drives the door turning mechanism to drive the door body rotation; Hover device, including setting the first clamping portion on the linkage wheel and setting the second clamping portion on the box, the linkage wheel rotates to drive the first clamping portion and the second clamping portion opposite and clamping, to brake the door turning mechanism rotates the door body; Wherein, when the external driving force that the linkage wheel receives is greater than the brake force between the first clamping portion and the second clamping portion, the brake state of the linkage wheel is relieved, and the door body closes or further expands the door body opening degree.

2. The refrigerator according to claim 1, wherein, The first clamping portion includes the limiting structure opened on the linkage wheel, and the second clamping portion includes the hovering piece and the push piece; The push piece is arranged on the box, and the hovering piece is movably arranged on the box, wherein the hovering piece is connected with the push piece, and the hovering piece abuts against the linkage wheel; In the case that the linkage wheel rotates to the state that the limiting structure and the second clamping portion are opposite, the push piece moves the hovering piece to abut against the limiting structure.

3. The refrigerator according to claim 2, wherein The hovering piece is provided with an abutting portion, which abuts against the linkage wheel, and the abutting portion is connected with the push piece.

4. The refrigerator according to claim 3, wherein The hovering piece is provided with a push limiting slot, and the push piece is arranged in the push limiting slot.

5. The refrigerator according to claim 2, wherein The hovering piece is provided with an abutting portion and a connecting portion, the abutting portion abuts against the linkage wheel, and the connecting portion is connected with the push piece.

6. The refrigerator according to claim 3, wherein The push piece is an elastic piece, one end of the elastic piece is connected with the box, the other end is connected with the hovering piece, and the elastic piece is elastically compressed or stretched between the box and the hovering piece.

7. The refrigerator according to claim 6, wherein The box is provided with a hovering limiting sliding groove, the hovering piece is slidably embedded in the hovering limiting sliding groove, the elastic piece is arranged in the hovering limiting sliding groove, one end of the elastic piece abuts against the box, and the other end abuts against the hovering piece.

8. The refrigerator according to claim 7, wherein The hovering piece is rod-shaped, and one end is provided with the abutting portion.

9. The refrigerator according to claim 6, wherein The elastic piece is a spring.

10. The refrigerator according to claim 2, wherein The limiting structure includes a groove arranged on the circumference of the linkage wheel, and the hovering piece abuts against the groove to brake the door turning mechanism rotating the door body.

11. The refrigerator according to claim 10, wherein The groove is C-shaped or V-shaped.

12. The refrigerator according to claim 1, wherein The first clamping portion includes a hovering portion and a connecting portion, the connecting portion connects the hovering portion and the linkage wheel; The second clamping portion includes a limiting portion arranged on the box, and a limiting slot is arranged on the limiting portion, when the hovering portion is clamped with the limiting portion, the hovering portion is clamped in the limiting slot; Wherein, the linkage wheel rotates to drive the hovering portion and the limiting slot to be clamped, to brake the door turning mechanism rotating the door body.

13. The refrigerator according to claim 12, wherein The second engaging part further comprises a guide part connected with the limiting part, when the linkage wheel rotates, the hovering part moves along the guide part to guide the hovering part to engage in the limiting slot.

14. The refrigerator according to claim 13, wherein The guide part comprises a guide plane tangent to the circumferential surface of the linkage wheel, the hovering part moves along the guide plane, and the limiting slot is arranged at one end of the guide plane.

15. The refrigerator of claim 12, wherein The hovering part comprises a clamping piece matched with the shape of the limiting slot, and the clamping piece is connected with the connecting part.

16. The refrigerator of claim 15, wherein The clamping piece is an elastically deformable clamping head, and the clamping head can be deformed to be embedded in or separated from the slot of the limiting slot.

17. The refrigerator of claim 16, wherein The clamping head is an elastically deformable hollow cylindrical piece.

18. The refrigerator of claim 12, wherein, The connecting part is an elastically deformable connecting arm.

19. The refrigerator according to any one of claims 1-18, wherein, The refrigerator further comprises a top door mechanism arranged on the linkage wheel, and the top door mechanism can push open the door body when the linkage wheel rotates.

20. The refrigerator of claim 19, wherein, The top door mechanism comprises a top door part protruding from the linkage wheel, and the top door part protrudes out of the box body to push open the door body when the linkage wheel rotates.

21. The refrigerator of claim 20, wherein The top door part has an appearance surface, and the appearance surface is flush with the sealing surface of the door body when the door body closes the box body.

22. The refrigerator according to any one of claims 1-18, wherein, The refrigerator further comprises a top door mechanism, and the top door mechanism comprises a top door piece movably arranged on the box body, and an abutting part arranged on the linkage wheel can push the top door piece to move relative to the box body to push open the door body when the linkage wheel rotates.

23. The refrigerator of claim 22, wherein, The abutting part has a top door surface, and the top door surface abuts against the top door piece to push the top door piece to move relative to the box body to push open the door body when the abutting part rotates with the linkage wheel.

24. The refrigerator of claim 23, wherein The top door surface gradually extends away from the rotation center of the linkage wheel.

25. The refrigerator of claim 23, wherein, The refrigerator further comprises an elastic piece connected between the box body and the top door piece, and the elastic piece can drive the top door piece to move with the circumferential surface of the linkage wheel to reset the top door piece when the top door piece is disengaged from the top door surface.

26. The refrigerator of claim 25, wherein, The box body is provided with a mounting slot, and the top door piece is movably arranged in the mounting slot.

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