Door opening and closing device and electric appliance

Abstract

The application relates to the technical field of door opening and closing, and provides a door opening and closing device and an electric appliance. The door opening and closing device comprises a driving mechanism, a speed reduction mechanism, a clutch mechanism and a connecting rod mechanism, the driving mechanism comprises a stator and a rotor, the speed reduction mechanism is connected to an output shaft of the rotor, the clutch mechanism is connected with the output shaft, one end of the connecting rod mechanism is in transmission connection with a clutch output part of the clutch mechanism, the other end of the connecting rod mechanism is provided with a mounting part, the clutch mechanism can be switched between a separation position and a combination position, in the combination position, a speed reduction output part is in transmission connection with the clutch mechanism, in the separation position, the speed reduction output part is disconnected from the clutch mechanism, the clutch mechanism is driven from the separation position to the combination position through rotation of the output shaft, and the clutch mechanism is switched from the combination position to the separation position through active movement of the clutch output part. The door opening and closing device has the functions of automatic door opening and closing and manual door opening and closing, the switching between the two functions is simple, and the performance is stable.

Description

Technical Field

[0001] This invention relates to the field of door opening and closing technology, and more particularly to door opening and closing devices and electrical equipment. Background Technology

[0002] As electrical equipment becomes increasingly automated, the demand for automatic door opening and closing is growing, especially for electrical equipment with doors.

[0003] In related technologies, automatic door opening and closing devices are large in size, have complex transmission mechanisms, and are difficult to integrate the functions of automatic and manual door opening and closing. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in related technologies. To this end, the present invention proposes a door opening and closing device that combines the functions of automatic and manual door opening and closing, with a simple switching method between the two functions and stable performance.

[0005] The present invention also proposes an electrical device.

[0006] According to a first aspect of the present invention, a door opening and closing device includes:

[0007] A drive mechanism, including a stator and a rotor, the rotor including an output shaft rotatable relative to the stator;

[0008] A speed reduction mechanism is connected to the output shaft;

[0009] The clutch mechanism is connected to the output shaft;

[0010] A linkage mechanism, one end of which is connected to the clutch output part of the clutch mechanism, and the other end of which is provided with a mounting part for connecting a door or cabinet.

[0011] The clutch mechanism can switch between a disengaged position and an engaged position. In the engaged position, the deceleration output of the deceleration mechanism is connected to the clutch mechanism. In the disengaged position, the deceleration output is disconnected from the clutch mechanism. The clutch mechanism is driven from the disengaged position to the engaged position by the rotation of the output shaft, and the clutch mechanism is switched from the engaged position to the disengaged position by the active movement of the clutch output.

[0012] The door opening and closing device according to an embodiment of the present invention includes a drive mechanism, a reduction mechanism, a clutch mechanism, and a linkage mechanism. The rotational power of the drive mechanism can be transmitted to the reduction mechanism. When the clutch mechanism is engaged, the rotational power is transmitted to the clutch mechanism through the reduction mechanism, and the clutch mechanism drives the linkage mechanism to move, thereby opening or closing the door. When the clutch mechanism is disengaged, the transmission relationship between the reduction mechanism and the clutch mechanism is released, and the rotational power of the reduction mechanism cannot be transmitted to the clutch mechanism. Therefore, the clutch mechanism cannot drive the linkage mechanism to move. At this time, the linkage mechanism can move actively, and its movement is not interfered with by the clutch mechanism and the reduction mechanism, allowing the user to manually open or close the door. The door opening and closing device simultaneously has the functions of automatic and manual door opening and closing, and the switching between the two functions is simple and the performance is stable.

[0013] According to an embodiment of the present invention, the deceleration output section is provided with a mating ring, and the clutch mechanism includes a moving member, a first rotating member and a second rotating member. The first rotating member and the second rotating member are rotatably connected to the output shaft. The first rotating member is provided with a first limiting part, and the second rotating member is provided with a second limiting part and a clutch output section. The first limiting part and the second limiting part are both provided in the inner ring of the mating ring, and the moving member is located between the first limiting part and the second limiting part.

[0014] Based on the rotation of the output shaft relative to the stator, the rotation of the mating ring drives the moving part to move between the first limiting part and the second limiting part until the moving part, the first rotating part, the second rotating part and the mating ring rotate synchronously, and the clutch mechanism switches to the engagement position.

[0015] According to one embodiment of the present invention, the first rotating member is provided with a limiting surface. In the engaged position, the limiting surface and the inner wall of the mating ring lock the moving member; in the disengaged position, at least one of the limiting surface and the inner wall of the mating ring is movable relative to the moving member.

[0016] According to one embodiment of the present invention, the radial distance from the limiting surface to the inner wall of the mating ring gradually increases in the direction closer to the first limiting portion.

[0017] According to one embodiment of the present invention, a first elastic element is provided between the moving element and the first rotating element. In the engagement position, the first elastic element is in an elastic deformation state so as to drive the clutch mechanism to switch from the engagement position to the disengagement position by the restoring force of the first elastic element.

[0018] According to one embodiment of the present invention, a set of the first limiting portion, the moving member and the first elastic member are provided on both sides of the second limiting portion in the circumferential direction.

[0019] According to one embodiment of the present invention, the inner ring of the second rotating member is formed with a mounting groove, and a plurality of second limiting portions are connected circumferentially to the bottom wall of the mounting groove. In the engagement position, the inner wall of the mounting groove, the wall surface of the mating ring, and the moving member are locked together.

[0020] According to one embodiment of the present invention, the clutch output section is provided with a third external gear ring, the linkage mechanism includes a connecting rod and a third gear rotatably connected to one end of the connecting rod, the third gear meshing with the third external gear ring, and the other end of the connecting rod is provided with the mounting section.

[0021] According to one embodiment of the present invention, the connecting rod includes a first connecting rod and a second connecting rod that are hinged together, the first connecting rod being fixedly connected to the third gear, and the second connecting rod being provided with the mounting portion.

[0022] According to one embodiment of the present invention, the reduction mechanism includes an external gear and a first connecting member. The external gear is eccentrically rotatably connected to the output shaft, and the first connecting member is rotatably connected to the output shaft. The first connecting member is provided with a first internal gear ring, and the external gear is provided with a first external gear ring. The first external gear ring meshes with the first internal gear ring for transmission, and the number of teeth of the first internal gear ring is greater than the number of teeth of the first external gear ring.

[0023] According to one embodiment of the present invention, a mating ring is provided based on the deceleration output part, the mating ring is provided on the first connecting member, and the mating ring is coaxially arranged with the first internal gear ring.

[0024] According to one embodiment of the present invention, the reduction mechanism further includes an internal gear member fixed to the stator, the internal gear member being provided with a second internal gear ring, and the external gear member being provided with a second external gear ring coaxial with the first external gear ring, the second external gear ring meshing with the second internal gear ring for transmission, and the number of teeth of the second internal gear ring being greater than the number of teeth of the second external gear ring.

[0025] According to one embodiment of the present invention, the inner ring of the stator is provided with the deceleration mechanism and the clutch mechanism.

[0026] According to one embodiment of the present invention, the rotor includes a first housing and a sensing portion disposed circumferentially on the first housing, the first housing connecting the sensing portion to the output shaft, the first housing covering at least one end of the stator in the axial direction, and the sensing portion being disposed on the outer periphery of the stator.

[0027] An electrical appliance according to a second aspect of the present invention includes a cabinet, a door, and a door opening and closing device as described in any one of the above, wherein the drive mechanism is mounted on one of the cabinet and the door, and the mounting portion is hinged to the other of the cabinet and the door.

[0028] The electrical equipment according to embodiments of the present invention has the functions of automatic door opening and closing and manual door opening and closing, and has a wide range of applications and a good user experience.

[0029] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of an electrical device equipped with a door opening and closing device provided in an embodiment of the present invention;

[0032] Figure 2 This is a cross-sectional view of the door opening and closing device provided in an embodiment of the present invention, illustrating the relevant structure of the deceleration mechanism;

[0033] Figure 3 This is a schematic cross-sectional view of the door opening and closing device provided in an embodiment of the present invention, and... Figure 2 The difference is that, Figure 3 The first housing is not shown in the diagram;

[0034] Figure 4 This is a longitudinal sectional view of the door opening and closing device provided in an embodiment of the present invention, illustrating the relevant structure of the deceleration mechanism. The figure shows the structure of the first type of clutch mechanism.

[0035] Figure 5 This is a three-dimensional structural schematic diagram of the first housing of the door opening and closing device provided in an embodiment of the present invention;

[0036] Figure 6 This is a longitudinal sectional view of the first housing of the door opening and closing device provided in an embodiment of the present invention;

[0037] Figure 7 This is a three-dimensional structural diagram of the output shaft of the door opening and closing device provided in an embodiment of the present invention;

[0038] Figure 8This is a three-dimensional structural diagram of the external gear of the door opening and closing device provided in an embodiment of the present invention;

[0039] Figure 9 This is a three-dimensional structural diagram of the first connecting member of the door opening and closing device provided in an embodiment of the present invention, to illustrate the first internal gear ring of the first connecting member;

[0040] Figure 10 This is a three-dimensional structural schematic diagram of the first connecting member of the door opening and closing device provided in an embodiment of the present invention, illustrating a deceleration output section of the first connecting member;

[0041] Figure 11 This is a cross-sectional view of the door opening and closing device provided in an embodiment of the present invention, projected upwards, to illustrate the structure of the first type of clutch mechanism;

[0042] Figure 12 This is a horizontal cross-sectional view and downward projection of the door opening and closing device provided in an embodiment of the present invention, illustrating the structure of the first type of clutch mechanism;

[0043] Figure 13 This is a three-dimensional structural diagram of the first connecting member of the door opening and closing device provided in an embodiment of the present invention, to illustrate the deceleration output part of another first connecting member;

[0044] Figure 14 This is a three-dimensional structural diagram of the second rotating component of the door opening and closing device provided in an embodiment of the present invention;

[0045] Figure 15 This is a three-dimensional structural diagram of the second rotating component of the door opening and closing device provided in an embodiment of the present invention, and... Figure 14 The difference is that, Figure 14 A bird's-eye view. Figure 15 A perspective looking upwards;

[0046] Figure 16 This is a three-dimensional structural schematic diagram of the first rotating component of the door opening and closing device provided in an embodiment of the present invention;

[0047] Figure 17 This is a top view of the structure of the first rotating component of the door opening and closing device provided in an embodiment of the present invention;

[0048] Figure 18 This is a bottom view of the door opening and closing device provided in an embodiment of the present invention, illustrating the structure of the second type of clutch mechanism;

[0049] Figure 19 This is a schematic diagram of the opening and closing device provided in an embodiment of the present invention, showing the structure of the second type of clutch mechanism;

[0050] Figure 20This is a schematic diagram of the structure of the first connecting plate or the second connecting plate of the door opening and closing device provided in the embodiment of the present invention;

[0051] Figure 21 This is a longitudinal sectional view of the second type of clutch mechanism of the door opening and closing device provided in the embodiment of the present invention;

[0052] Figure 22 This is a longitudinal sectional view of the second type of clutch mechanism of the door opening and closing device provided in the embodiment of the present invention, and... Figure 21 The difference is that the diagram shows the first shell, and the perspective is different;

[0053] Figure 23 This is a top view of the door opening and closing device provided in an embodiment of the present invention, installed on the cabinet and the door.

[0054] Figure label:

[0055] 100. Drive mechanism; 110. Stator; 111. Mounting space; 112. Stator frame; 120. Rotor; 121. Induction unit; 122. First housing; 1221. Heat dissipation hole; 1222. Through hole; 123. Output shaft; 124. Eccentric shaft section; 130. Second housing; 131. Bracket; 140. Third housing; 150. Support device; 160. Fifth bearing; 170. Sixth bearing;

[0056] 200. Reduction mechanism; 210. External gear component; 211. First external gear ring; 212. Second external gear ring; 213. First bearing; 220. First connecting component; 221. First internal gear ring; 222. Reduction output part; 2221. Mating ring; 2222. First gear; 2223. Connecting shaft section; 223. Second bearing; 230. Internal gear component; 231. Second internal gear ring; 232. Positioning part;

[0057] 300. Clutch mechanism; 310. Moving component; 320. First rotating component; 321. First limiting part; 322. Limiting surface; 323. Third bearing; 330. Second rotating component; 331. Second limiting part; 332. Mounting groove; 333. Third external gear ring; 340. First elastic component; 350. Connecting part; 351. First connecting plate; 352. Second connecting plate; 3521. Groove; 353. Reinforcing component; 354. Guide surface; 355. Recessed part; 360. Second gear; 370. Reset part; 371. Second elastic component; 372. Guide component; 373. Spherical part;

[0058] 400. Linkage mechanism; 410. Mating part; 411. Third gear; 420. First connecting rod; 430. Second connecting rod; 431. First arc segment; 432. Second arc segment; 440. Mounting part; 450. First detection piece; 460. Second detection piece;

[0059] 500, Door body; 510, Mounting base; 600, Cabinet body; 700, Hinge. Detailed Implementation

[0060] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0061] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., 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 the embodiments of the present invention and for 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 the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise stated, "multiple," "multiple roots," and "multiple groups" mean two or more.

[0062] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0063] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0065] The door opening and closing device of the present invention can be used, but is not limited to, for electrical appliances that require opening and closing doors, such as refrigerators, cabinets, dishwashers, and cooking appliances. The door opening and closing device can be installed in one of the cabinet or door of the electrical appliance, and is connected to the other cabinet or door to drive the door to open or close. Figures 1 to 23 As shown, the example is a refrigerator with a door opening and closing device installed.

[0066] The door opening and closing device provided in this embodiment of the invention includes a drive mechanism 100, a clutch mechanism 300, and a linkage mechanism 400. The drive mechanism 100 provides driving power, the clutch mechanism 300 is disposed between the drive mechanism 100 and the linkage mechanism 400, the drive mechanism 100 is installed in one of the cabinet 600 and the door 500, and the linkage mechanism 400 connects the other of the cabinet 600 and the door 500. The driving force of the drive mechanism 100 is transmitted through the linkage mechanism 400 to drive the door 500 to open or close relative to the cabinet 600. (Reference) Figure 1 and Figure 23 As shown, the drive mechanism 100 is installed on the cabinet 600, and the linkage mechanism 400 is connected to the door 500.

[0067] refer to Figure 2 As shown, the drive mechanism 100 includes a stator 110 and a rotor 120. When the drive mechanism 100 is energized, an induced electromotive force is generated between the rotor 120 and the stator 110. Under the action of the induced electromotive force, the rotor 120 can rotate relative to the stator 110, so that the rotational power is transmitted to the clutch mechanism 300 through the rotor 120, thereby driving the linkage mechanism 400 to move and realize the door opening and closing control. In some cases, the drive mechanism 100 is also connected to a reduction mechanism 200. The reduction mechanism 200 is connected to the rotor 120. The speed output by the rotor 120 is reduced by the reduction mechanism 200 and then transmitted to the linkage mechanism 400 through the clutch mechanism 300 to regulate the speed of door opening and closing.

[0068] The clutch mechanism 300 can switch between a disengaged position and an engaged position. In the engaged position, the drive mechanism 100 is connected to the linkage mechanism 400 via the clutch mechanism 300, and the driving power of the drive mechanism 100 is transmitted to the linkage mechanism 400 to drive the door 500 to open or close. In the disengaged position, the drive mechanism 100 is disconnected from the linkage mechanism 400 via the clutch mechanism 300, and the driving power of the drive mechanism 100 is no longer transmitted to the linkage mechanism 400. Neither the drive mechanism 100 nor the clutch mechanism 300 interferes with the movement of the linkage mechanism 400, ensuring smooth manual opening and closing of the door by the user. Using the door opening and closing device of this embodiment, both automatic opening and closing and manual closing can be achieved.

[0069] refer to Figure 4 As shown, when the drive mechanism 100 includes a reduction mechanism 200, which is connected to the output end of the rotor 120, the rotational speed of the rotor 120 can be transmitted to the reduction mechanism 200 and reduced through the reduction mechanism 200. The rotational speed of the reduction output section 222 of the reduction mechanism 200 is less than the output speed of the rotor 120. When the clutch mechanism 300 is in the engaged position, the reduction mechanism 200 and the linkage mechanism 400 are connected by transmission through the clutch mechanism 300, so that the rotational power of the reduction mechanism 200 is transmitted to the linkage mechanism 400 to open or close the door through the driving force of the drive mechanism 100. When the clutch mechanism 300 is in the disengaged position, the reduction mechanism 200 and the linkage mechanism 400 are disconnected by the clutch mechanism 300.

[0070] The above content provides a brief description of the door opening and closing control of the door opening and closing device. The following sections will describe the specific structures of the drive mechanism 100, the deceleration mechanism 200, the clutch mechanism 300, and the linkage mechanism 400 in turn.

[0071] Regarding drive mechanism 100:

[0072] refer to Figures 1 to 7 As shown, the drive mechanism 100 includes a stator 110 and a rotor 120, which can be understood as providing drive power through an electric motor.

[0073] In some cases, refer to Figure 4 As shown, the inner ring of the stator 110 forms an installation space 111, which can be used to install at least one of the components such as the rotor 120, the reduction mechanism 200, and the clutch mechanism 300. Of course, the rotor 120, the reduction mechanism 200, and the clutch mechanism 300 are not limited to being arranged in the installation space 111; the rotor 120, the reduction mechanism 200, and the clutch mechanism 300 can also be arranged in the outer ring of the stator 110 (not shown in the figure).

[0074] The stator 110 includes stator coils and a stator frame 112, with the stator frame 112 providing inter-turn insulation for the stator coils. The stator frame 112 is an insulating frame and will not interfere with the power transmission of the inner ring components of the stator 110.

[0075] refer to Figure 2 As shown, the rotor 120 includes a sensing unit 121, a first housing 122, and an output shaft 123. The first housing 122 connects the sensing unit 121 and the output shaft 123. An induced electromotive force can be generated between the sensing unit 121 and the stator 110, causing the sensing unit 121 to rotate relative to the stator 110. The rotational power of the sensing unit 121 can be transmitted to the output shaft 123 through the first housing 122, causing the output shaft 123 to rotate. The rotational power of the output shaft 123 can be transmitted to the linkage assembly to drive the door 500 to open and close. A reduction mechanism 200 is connected to the output shaft 123, so that the rotational speed of the output shaft 123 is reduced by the reduction mechanism 200 and then transmitted to the linkage mechanism 400.

[0076] refer to Figures 4 to 6 As shown, the sensing part 121 can be a magnet, which can be fixed to the inner circumferential ring of the first housing 122. The first housing 122 protects the magnet from interference from the external environment. A sensing cavity can also be provided inside the first housing 122, which is filled with a sensing material. The sensing cavity and the sensing material cooperate to form the sensing part 121.

[0077] refer to Figure 4 and Figure 5 As shown, the first housing 122 is fixedly connected to the output shaft 123. The connection between the first housing 122 and the output shaft 123 can be detachable or non-detachable. When the first housing 122 has a through hole 1222, the output shaft 123 passes through the through hole 1222 and can be screwed onto one side of the first housing 122 using a nut, so that the output shaft 123 is inserted into the installation space 111. Alternatively, the first housing 122 and the output shaft 123 can also be fixed by welding, integral molding, or other methods.

[0078] In some cases, refer to Figure 4 As shown, the first housing 122 extends from the outer ring of the stator 110 toward one end of the stator 110 and covers one axial end of the stator 110. The first housing 122 has heat dissipation holes 1221. The heat dissipation holes 1221 can be set in the area corresponding to the stator coil. The heat dissipation holes 1221 can also be set in the part connecting the output shaft 123. The heat dissipation holes 1221 can also be evenly distributed in the first housing 122. The arrangement of the heat dissipation holes 1221 is not limited to the above-mentioned methods and can be selected according to the specific needs.

[0079] In some cases, refer to Figure 4As shown, a first housing 122 is provided at one axial end of the stator 110, and a second housing 130 is provided at the other axial end of the stator 110. The first housing 122 and the second housing 130 cooperate to protect the inner ring components of the stator 110, and the second housing 130 can be fixed to the stator 110. The structure of the first housing 122 and the second housing 130 is not limited and can be selected as needed; for example, the structures of the first housing 122 and the second housing 130 may be the same or different. A clutch mechanism 300 and a reduction mechanism 200 are provided between the first housing 122 and the second housing 130.

[0080] Combination Figure 4 , Figure 21 and Figure 22 As shown, the output shaft 123 is rotatably connected to the second housing 130, such as via a fifth bearing 160. The second housing 130 provides radial support and limits the output shaft 123, preventing it from wobbling. A retaining ring is connected to the end of the output shaft 123 extending out of the second housing 130 to axially limit its movement. It should be noted that the output shaft 123 does not necessarily require radial limitation via the second housing 130; there may be no direct connection between the output shaft 123 and the second housing 130, and radial limitation can be achieved through other means.

[0081] refer to Figure 4 As shown, the first housing 122 is located at the upper end of the stator 110, and the second housing 130 is located at the lower end of the stator 110. The second housing 130 is fixed to the stator frame 112, and the drive mechanism 100 can be mounted on the cabinet 600 through the second housing 130. The second housing 130 is provided with a bracket 131, which extends from the bottom of the stator 110 to the outside of the stator 110, allowing the bracket 131 to be connected to the cabinet 600 from the outside of the stator 110. This facilitates the assembly and disassembly of the bracket 131 and eliminates the need to reserve space for assembly and disassembly below the stator 110, thus reducing the overall thickness of the door opening and closing device. The second housing 130 does not cover the stator coils, ensuring heat dissipation for the stator coils.

[0082] In some cases, refer to Figure 4 and Figure 22As shown, a third housing 140 is provided at one end of the stator 110. The third housing 140 is fixedly connected to the stator frame 112 and is located between the first housing 122 and the reduction mechanism 200. The third housing 140 is rotatably connected to the output shaft 123 through a sixth bearing 170. The third housing 140 provides circumferential limiting for the output shaft 123, ensuring the rotational stability of the output shaft 123. A second housing 130 is connected to the other end of the stator 110 along its axial direction. The second housing 130 and the third housing 140 cover both ends of the mounting space 111, protecting the components within the mounting space 111 and preventing them from being disturbed by the external environment.

[0083] The third housing 140 is fixed to the stator frame 112 by means of fasteners, snap-fit, plug-in, etc. The fixing method of the third housing 140 is varied and can be selected as needed. The third housing 140 is connected to the inner ring of the stator frame 112.

[0084] A support device 150 is provided between the third housing 140 and the first housing 122. The first housing 122 has a first groove, and the third housing 140 has a third groove. One end of the support device 150 is confined within the first groove, and the other end is confined within the second groove. This allows the support device 150 to be supported between the first housing 122 and the third housing 140, providing axial support to the first housing 122 through the support device 150. This ensures the axial stability of the first housing 122 and also allows the first housing 122 to rotate circumferentially relative to the third housing 140. The support device 150 can be a bearing, a smooth block, etc., and must simultaneously satisfy both axial support and circumferential rotation requirements. The structural form of the support device 150 is not limited.

[0085] It should be noted that the main structure of the linkage mechanism 400 is located outside the installation space 111. The end of the linkage mechanism 400 needs to pass through the second housing 130 to connect with the reduction mechanism 200 and the clutch mechanism 300 in the installation space 111 to realize power transmission.

[0086] refer to Figure 2 and Figure 4 As shown, the sensing part 121 is located on the outside of the stator 110. The stator 110 and the rotor 120 are combined to form an external rotor 120 motor, which is suitable for low-speed applications. The output shaft 123, the reduction mechanism 200, the clutch mechanism 300, etc. can be installed in the mounting space 111 of the inner ring of the stator 110. The space of the inner ring of the stator 110 is fully utilized, which helps to reduce the size of the door opening and closing mechanism.

[0087] It should be noted that when the mounting space 111 is formed in the inner ring of the stator 110, the sensing part 121 is not limited to being located in the outer ring of the stator 110. The sensing part 121 can also be located in the inner ring of the stator 110 (not shown in the figure), that is, the sensing part 121 can be located in the mounting space 111.

[0088] The following embodiments of the present invention are described with the example of the sensing unit 121 being located on the outer ring of the stator 110 and the deceleration mechanism 200 being located on the inner ring of the stator 110.

[0089] Regarding the speed reduction mechanism 200:

[0090] refer to Figures 2 to 10 As shown, the reduction mechanism 200 is installed in the mounting space 111 of the inner ring of the stator 110. The reduction mechanism 200 reduces the speed output by the rotor 120 and outputs it to the connecting rod mechanism 400.

[0091] refer to Figure 2 , Figure 3 and Figure 4 As shown, the reduction mechanism 200 can reduce speed through planetary gear transmission. The planetary gear transmission can perform single-stage, two-stage, or multi-stage reduction transmission to achieve sufficient speed reduction.

[0092] Understandably, reference Figure 2 and Figure 3 As shown, the reduction mechanism 200 includes an external gear 210 and a first connecting member 220. The external gear 210 is eccentrically rotatably connected to the output shaft 123 of the rotor 120. The external gear 210 is provided with a first external gear ring 211. The first connecting member 220 is rotatably connected to the output shaft 123. The axis of rotation of the first connecting member 220 is coaxial with the axis of rotation of the output shaft 123. The first connecting member 220 is provided with a first internal gear ring 221 and a reduction output part 222. The first external gear ring 211 meshes with the first internal gear ring 221 for transmission. The number of teeth of the first internal gear ring 221 is greater than the number of teeth of the first external gear ring 211. The rotational power of the output shaft 123 is transmitted to the eccentrically connected external gear 210. Driven by the output shaft 123, the external gear 210 rotates around the axis of the output shaft 123. As the external gear 210 rotates, along the circumference of the first internal gear ring 221, the teeth of the first external gear ring 211 sequentially mesh with the teeth of the first internal gear ring 221 to transmit the rotational power to the first connector 220. Since the number of teeth of the first internal gear ring 221 is greater than the number of teeth of the first external gear ring 211, the first internal gear ring 221 rotates less than one revolution for one revolution of the first external gear ring 211. This makes the rotational speed of the first connector 220 less than the rotational speed of the external gear 210, thus achieving deceleration of the deceleration output section 222 of the first connector 220, and the deceleration mechanism 200 achieves deceleration.

[0093] It should be noted that "the external gear 210 is eccentrically rotatably connected to the output shaft 123 of the rotor 120". The output shaft 123 is a circular shaft of equal diameter. An eccentric component is fixedly connected to the output shaft 123. The external gear 210 is sleeved on the outside of the eccentric component and rotatably connected to it. The external gear 210 is a ring structure of equal diameter around its own axis. The external gear 210 is eccentrically connected to the output shaft 123. The central axis of the external gear 210 is parallel to the rotation axis of the output shaft 123 and separated by a preset distance, so that the external gear 210 can rotate around its central axis while rotating with the output shaft 123. Unlike the aforementioned connection method, the output shaft 123 can also be a crankshaft. The part of the output shaft 123 corresponding to the external gear 210 is set as an eccentric shaft segment 124. The external gear 210 is rotatably connected to the outside of the eccentric shaft segment 124. The eccentric shaft segment 124 has the same function as the aforementioned eccentric component. Unlike the aforementioned implementation, the outer ring of the output shaft 123 is provided with a transmission external gear ring. The first external gear ring 211 of the external gear member 210 can mesh and transmit power between the transmission external gear ring and the first internal gear ring 221. At this time, the external gear member 210 and the transmission external gear ring are arranged side by side. The output shaft 123 is equivalent to the sun gear, the external gear member 210 is equivalent to the planet gear, and the first internal gear ring 221 is equivalent to the output gear ring. It should be noted that the relationship between the radius of the external gear member 210 and the radius of the output shaft 123 is not limited.

[0094] The outer ring of the eccentric component (or eccentric shaft segment 124) is connected to the external gear component 210 via a first bearing 213. This reduces the rotational friction of the external gear component 210 through the first bearing 213, ensuring transmission accuracy. The eccentric component or eccentric shaft segment 124: forms the outer wall of the eccentric component (or eccentric shaft segment 124) by rotating around a preset axis with a preset radius. The preset axis is spaced at a preset distance from the rotation axis of the output shaft 123. The external gear component 210 has a circular structure, allowing it to be eccentrically rotatably connected to the eccentric component (or eccentric shaft segment 124).

[0095] The first internal gear ring 221 and the reduction output part 222 are coaxially arranged, and the axis of rotation of the first internal gear ring 221 and the reduction output part 222 are both coincident with the axis of the output shaft 123. After the reduction mechanism 200 reduces speed, the reduction output part 222 is still coaxial with the output shaft 123. The first connector 220 can be limited by the output shaft 123, which facilitates the positioning and installation of the first connector 220.

[0096] The first connecting member 220 is connected to the output shaft 123 via a second bearing 223 to reduce rotational friction between the first connecting member 220 and the output shaft 123. (Reference) Figure 9 and Figure 10As shown, the first internal gear ring 221 of the first connector 220 and the reduction output part 222 are connected by a plate structure. One or more second bearings 223 may be provided on the inner ring of the first connector 220, such as two second bearings 223 arranged along the axial direction of the first connector 220.

[0097] The above describes the technical solution for the reduction mechanism 200 to achieve primary speed reduction through the cooperation of the external gear 210 and the first connecting member 220. The following describes the secondary speed reduction achieved by the reduction mechanism 200.

[0098] Understandably, reference Figure 4 , Figure 21 and Figure 22 As shown, the reduction mechanism 200 also includes an internal gear 230, which is fixed to the stator 110. The internal gear 230 is provided with a second internal gear ring 231, and the external gear 210 is also provided with a second external gear ring 212 coaxial with the first external gear ring 211. The second internal gear ring 231 and the second external gear ring 212 mesh and drive each other. The number of teeth of the second internal gear ring 231 is greater than the number of teeth of the second external gear ring 212. Based on the eccentric rotatable external gear 210 connected to the output shaft 123, and the fixed external gear ring 212 with the first external gear ring 211, it can be concluded that the second external gear ring 212 rotates eccentrically relative to the output shaft 123. The second external gear ring 212 meshes with the second internal gear ring 231 to form a planetary gear system. The second internal gear ring 231 of the internal gear 230 remains fixed. The number of teeth of the second internal gear ring 231 is greater than the number of teeth of the second external gear ring 212. After the second external gear ring 212 meshes with the second internal gear ring 231, it decelerates and rotates, performing a first-stage deceleration. The rotational speed of the second external gear ring 212 is the same as that of the first external gear ring 211. Then, through the meshing of the first external gear ring 211 with the first internal gear ring 221, a second-stage deceleration is performed. The internal gear 230, the external gear 210, and the first connecting member 220 can cooperate to achieve two-stage deceleration, with good deceleration effect and a transmission ratio of over 100, achieving sufficient deceleration.

[0099] The internal gear 230 is fixed to the stator 110, and can also be fixed to the stator frame 112 or the second housing 130. Various methods of fixing the internal gear 230 are available. (Reference) Figure 4 and Figure 21As shown, the internal gear component 230 is fixed to the stator frame 112, which in turn fixes and supports it. The major diameter of the second internal gear ring 231 of the internal gear component 230 is close to the inner diameter of the stator frame 112, making full use of the space within the stator frame 112 and also helping to increase the number of teeth in the second internal gear ring 231 to increase the reduction ratio. The internal gear component 230 and the external gear component 210 work together to achieve a single-stage reduction. Multiple positioning blocks 232 are provided on the outer periphery of the internal gear component 230. The internal gear component 230 is secured to the stator frame 112 by the positioning blocks 232, improving the installation stability of the internal gear component 230 and facilitating installation.

[0100] refer to Figure 4 As shown, the first connector 220 is disposed on the inner ring of the stator frame 112, and a gap is provided between the outer wall of the first connector 220 and the inner wall of the stator frame 112 to avoid contact friction. Correspondingly, the inner diameter of the first internal gear ring 221 is smaller than the inner diameter of the second internal gear ring 231, where the inner diameter can be understood as the major diameter or minor diameter. In some cases, the number of teeth of the first internal gear ring 221 is less than the number of teeth of the second internal gear ring 231.

[0101] The first external gear ring 211 and the second external gear ring 212 are coaxially arranged and fixed together. The external gear 210 has a double gear structure. The outer diameter of the second external gear ring 212 is larger than the outer diameter of the first external gear ring 211. The outer diameter can be understood as the major diameter or the minor diameter. For example, the major diameter of the second external gear ring 212 is larger than the major diameter of the first external gear ring 211, so as to adapt to the first internal gear ring 221 and the second internal gear ring 231.

[0102] It is understandable that the deceleration output unit 222 is connected to the clutch mechanism 300 so that the rotational power of the deceleration output unit 222 can be transmitted to the linkage mechanism 400 through the clutch mechanism 300.

[0103] The reduction output unit 222 can be adapted to various types of clutch mechanisms 300, such as those mentioned above. Figures 11 to 17 As shown, the clutch mechanism 300 is an overrunning clutch, and the deceleration output section 222 includes a mating ring 2221 adapted to the overrunning clutch. (Refer to...) Figures 18 to 22 As shown, the clutch mechanism 300 includes multiple transmission gears. The clutch mechanism 300 and the reduction output unit 222, as well as the clutch mechanism 300 and the linkage mechanism 400, are all driven by meshing. The reduction output unit 222 includes gears that can be meshed.

[0104] refer to Figure 12 and Figure 13 As shown, the deceleration output unit 222 includes a mating ring 2221, which is adapted to the clutch mechanism 300. The mating ring 2221 can move synchronously with the clutch mechanism 300, transmitting rotational power to the clutch mechanism 300 through the mating ring 2221 to achieve synchronous rotation between the clutch mechanism 300 and the mating ring 2221; Reference Figure 12 As shown, the deceleration output unit 222 includes a first gear 2222, which meshes with the clutch mechanism 300 for transmission.

[0105] In some cases, combined Figure 4 , Figure 9 and Figure 10 As shown, the clutch mechanism 300 and the external gear 210 are located on opposite sides of the first connecting member 220. The first connecting member 220 not only serves a transmission function but also separates the external gear 210 and the clutch mechanism 300. The external gear 210 is positioned above the first connecting member 220, and the clutch mechanism 300 is positioned below the first connecting member 220.

[0106] The above content provides a relevant solution for the reduction mechanism 200 to reduce speed using the principle of planetary gear trains. However, the reduction scheme of the reduction mechanism 200 is not limited to the aforementioned method. For example, the reduction assembly can perform multi-stage reduction by sequentially meshing multiple external gears. Regardless of the method used by the reduction mechanism 200 to reduce speed, the reduction output part 222 of the reduction mechanism 200 cooperates with the clutch mechanism 300 to transmit the driving power to the linkage mechanism 400 through the clutch mechanism 300. The clutch mechanism 300 will be described below.

[0107] Understandably, the clutch mechanism 300 can switch between a disengaged position and an engaged position. When the clutch mechanism 300 is engaged, the deceleration output unit 222 is connected to the clutch mechanism 300, and the clutch mechanism 300 is also connected to the linkage mechanism 400, so that the rotational power of the deceleration output unit 222 is transmitted to the linkage mechanism 400 through the clutch mechanism 300 for automatic door opening and closing. When the clutch mechanism 300 is disengaged, the deceleration output unit 222 is disengaged from the clutch mechanism 300, or the clutch mechanism 300 is disengaged from the linkage mechanism 400. At this time, the rotational power of the deceleration output unit 222 cannot be transmitted to the linkage mechanism 400, and the linkage mechanism 400 will not receive the driving power from the drive mechanism 100. The linkage mechanism 400 can move freely after being subjected to external force. The user can drive the linkage mechanism 400 to move by the external force of opening and closing the door. The movement of the linkage mechanism 400 is not affected by the drive mechanism 100 and the clutch mechanism 300.

[0108] In some cases, the deceleration mechanism 200 actively rotates to drive the clutch mechanism 300 from the disengaged position to the engaged position. After being driven by the deceleration output unit 222, the clutch mechanism 300 switches from the disengaged position to the engaged position under the drive of the deceleration output unit 222, and then drives the door body 500 to open or close automatically through the deceleration output unit 222.

[0109] In some cases, the clutch mechanism 300 is switched from the engaged position to the disengaged position by the active movement of the clutch output part. That is, the active movement of the linkage mechanism 400 will drive the clutch output part to switch to the disengaged position. Alternatively, the clutch mechanism 300 is normally in the disengaged position, so that the user can manually open and close the door at any time. In this case, the clutch mechanism 300 is equipped with a reset component. After the deceleration output part 222 stops outputting power, the reset force provided by the reset component will drive the clutch mechanism 300 back to the disengaged position.

[0110] The state switching of the clutch mechanism 300 can be achieved by adjusting the connection relationship between the clutch mechanism 300 and the reduction mechanism 200. The clutch mechanism 300 maintains a transmission connection with the linkage mechanism 400.

[0111] Below, for reference Figures 11 to 17 As shown, the first embodiment of the clutch mechanism 300 is described using the example of "the clutch mechanism 300 and the linkage mechanism 400 are kept in a state of transmission connection. In the engaged position, the clutch mechanism 300 is transmission connected to the deceleration output unit 222. In the disengaged position, the clutch mechanism 300 is disengaged from the deceleration output unit 222".

[0112] The clutch mechanism 300 is located within the mounting space 111 of the inner ring of the stator 110, making full use of the mounting space 111 and achieving a high degree of integration of the door opening and closing device. However, the clutch mechanism 300 is not limited to being located within the mounting space 111; the clutch mechanism 300 can also be located outside the mounting space 111.

[0113] Understandably, reference Figure 11 and Figure 12As shown, the deceleration output section 222 is provided with a mating ring 2221. The clutch mechanism 300 includes a moving component 310, a first rotating component 320, and a second rotating component 330. The first rotating component 320 and the second rotating component 330 are rotatably connected to the output shaft 123. The first rotating component 320 is provided with a first limiting part 321, and the second rotating component 330 is provided with a second limiting part 331 and a clutch output section. The first limiting part 321 and the second limiting part 331 are both located on the inner ring of the mating ring 2221, and the moving component 310 is located between the first limiting part 321 and the second limiting part 331. Based on the active rotation of the deceleration mechanism 200, the moving component 310... The first limiting part 321 moves between the second limiting part 331 until the moving part 310, the first limiting part 321, the second limiting part 331 and the mating ring 2221 move synchronously. That is, the moving part 310, the first rotating part 320, the second rotating part 330 and the mating ring 2221 have no relative movement. Then the clutch mechanism 300 switches to the engaged position. At this time, the rotational power of the mating ring 2221 is transmitted to the second rotating part 330. Based on the transmission connection between the clutch output part of the second rotating part 330 and the mating part 410 of the linkage mechanism 400, the mating part 410 of the linkage mechanism 400 rotates under the drive of the second rotating part 330.

[0114] The moving part 310, the first rotating part 320, the second rotating part 330 and the mating ring 2221 combine to form the structure of the overrunning clutch, and the separation position can be understood as the overrunning state.

[0115] The first rotating member 320 is located on the inner ring of the mating ring 2221. The first rotating member 320 includes a body portion and a first limiting portion 321. The first limiting portion 321 protrudes outward along the outer wall of the body portion, and a channel is formed between the outer wall of the body portion and the inner wall of the mating ring 2221. The first limiting portion 321, the second limiting portion 331, and the moving member 310 are all located within the channel. When there is no relative movement between the mating ring 2221, the first limiting portion 321, the second limiting portion 331, and the moving member 310, the clutch mechanism 300 is in the engaged position. The mating ring 2221 transmits rotational power to the first limiting portion 321 and the second limiting portion 331. That is, the first rotating member 320 and the second rotating member 330 both rotate in the same direction and have the same speed as the mating ring 2221, thus realizing torque transmission. When there is relative movement between the mating ring 2221, the first limiting part 321, the second limiting part 331 and the moving part 310, the clutch mechanism 300 is in the disengaged position, and the torque of the mating ring 2221 cannot be transmitted to the second rotating part 330.

[0116] The mating ring 2221 is coaxially arranged with the first internal gear ring 221. The moving part 310 can be spherical, ball-shaped, cylindrical, or other structures, and the structural form of the moving part 310 is diverse.

[0117] It is understood that the first rotating member 320 is provided with a limiting surface 322. In the engaged position, the limiting surface 322 and the inner wall of the mating ring 2221 lock the moving member 310; in the disengaged position, at least one of the limiting surface 322 and the inner wall of the mating ring 2221 can move relative to the moving member 310.

[0118] refer to Figure 11 , Figure 12 and Figure 17 As shown, the radial distance between the limiting surface 322 and the inner wall of the mating ring 2221 gradually increases in the direction closer to the first limiting part 321. That is, the distance between the limiting surface 322 and the rotation axis of the first rotating member 320 gradually decreases in the direction closer to the first limiting part 321. The further away the moving member 310 is from the first limiting part 321, the smaller the movement space of the moving member 310. The limiting effect of the limiting surface 322 and the inner wall of the mating ring 2221 on the moving member 310 is greater until the moving member 310 is limited between the limiting surface 322 and the inner wall of the mating ring 2221, and the clutch mechanism 300 switches to the engagement position.

[0119] The limiting surface 322 is located on the outer wall of the first rotating member 320 facing the mating ring 2221. The limiting surface 322 can be a straight-line extending surface or an arc-shaped curved surface. The structural form of the limiting surface 322 is not limited.

[0120] Understandably, reference Figure 11 As shown, a first elastic element 340 is provided between the moving member 310 and the second rotating member 330. In the engaged position, the first elastic element 340 is in an elastic deformation state, so that the clutch mechanism 300 is driven to switch from the engaged position to the disengaged position by the restoring force of the first elastic element 340. During the process of the clutch mechanism 300 moving from the disengaged position to the engaged position, the first elastic element 340 undergoes elastic deformation; in the engaged position, the first elastic element 340 remains in the elastic deformation state; after the mating ring 2221 stops providing rotational driving force, the restoring force of the first elastic element 340 is used to drive the moving member 310 to move, so that the moving member 310 moves to the position where it is released from mutual restraint with the first limiting part 321, the second limiting part 331 and the mating ring 2221, that is, the clutch mechanism 300 moves to the disengaged position.

[0121] One end of the first elastic element 340 abuts against the moving element 310, and the other end of the first elastic element 340 is fixedly connected to the first rotating element 320, or the other end of the first elastic element 340 abuts against the first rotating element 320. The installation method of the first elastic element 340 can be selected as needed. The first elastic element 340 can be a spring. At least one end of the first elastic element 340 is fitted with a guide sleeve, which abuts against the moving element 310, and the contact stability between the guide sleeve and the moving element 310 is good. When the end of the first elastic element 340 facing away from the moving element 310 is not provided with a guide sleeve, the first elastic element 340 can be directly connected to the first rotating element 320.

[0122] Understandably, reference Figure 11 and Figure 12 As shown, a set of first limiting parts 321, moving parts 310, and first elastic parts 340 are provided on both sides of the second limiting part 331 in the circumferential direction. The moving parts 310, first limiting parts 321, second limiting parts 331, and the inner wall of the mating ring 2221 on the left side of the second limiting part 331 are fixed together; or, the moving parts 310, first limiting parts 321, second limiting parts 331, and the inner wall of the mating ring 2221 on the right side of the second limiting part 331 are fixed together. The second limiting part 331 rotates to the left, corresponding to one of opening and closing the door, and rotates to the right, corresponding to the other of opening and closing the door, so as to realize stable switching of opening and closing the door.

[0123] The second adapter is provided with a plurality of second limiting parts 331 in the circumferential direction. A first limiting part 321 is provided between adjacent second limiting parts 331. A moving part 310 is provided between the first limiting part 321 and the second limiting part 331. A first elastic part 340 is provided between the moving part 310 and the second limiting part 331.

[0124] It is understood that the inner ring of the second rotating member 330 has a mounting groove 332, and the bottom wall of the mounting groove 332 is circumferentially connected with a plurality of second limiting parts 331, and the mating ring 2221 is inserted into the mounting groove 332. Alternatively, it can be understood that the mounting groove 332 is formed on the inner side of the clutch output part, and the inner wall of the mounting groove 332 is located on the outer side of the mating ring 2221. The mounting groove 332 serves to protect the mating ring 2221, facilitating the integration of the second limiting parts 331 and the clutch output part, thus simplifying the structure of the second rotating member 330.

[0125] refer to Figure 14 and Figure 15 As shown, the bottom wall of the mounting groove 332 protrudes upward with a plurality of second limiting portions 331, and the second limiting portions 331 are located between adjacent first limiting portions 321.

[0126] It is understandable that the clutch output part of the second rotating member 330 is provided with a third external gear ring 333, and the linkage mechanism 400 includes a connecting rod and a third gear 411 fixedly connected to one end of the connecting rod. The third gear 411 meshes with the third external gear ring 333, and the connecting rod is driven to rotate through the meshing of the third gear 411 and the third external gear ring 333. The mounting part 440 provided at the other end of the connecting rod transmits the rotational power to the door body 500, so that the door body 500 opens under the transmission of the connecting rod.

[0127] refer to Figure 11 and Figure 12 As shown, the first rotating component 320 is rotatably connected to the outside of the output shaft 123 via the third bearing 323. The second rotating component 330 is rotatably connected to the outside of the output shaft 123 via the fourth bearing (not shown in the figure). The third gear 411 is rotatably connected to the second housing 130, with its shaft passing through the second housing 130. The third gear 411 is located inside the second housing 130, and the connecting rod is located outside the second housing 130. The connecting rod is fixedly connected to the shaft of the third gear 411 to transmit rotational power to the connecting rod via the third gear 411. The third gear 411 is an external gear, and its rotation axis is parallel to and spaced from the rotation axis of the output shaft 123. The shaft of the third gear 411 can be rotatably connected to the second housing 130 via the sixth bearing 170.

[0128] The above content, combined with Figures 11 to 17 As shown, the first type of clutch mechanism 300, in which "the clutch mechanism 300 and the linkage mechanism 400 are in a state of transmission connection, the clutch mechanism 300 is in the engaged position and the reduction output unit 222 is in a transmission connection, and the clutch mechanism 300 is in the disengaged position and the reduction output unit 222 is disengaged," will be described below. The second type of clutch mechanism 300 will then be provided. Figures 18 to 22 As shown, in the second type of clutch mechanism 300: "The clutch mechanism 300 and the deceleration output unit 222 are kept in a state of transmission connection. In the engaged position, the clutch mechanism 300 is transmission connected to the linkage mechanism 400. In the disengaged position, the clutch mechanism 300 is disengaged from the linkage mechanism 400."

[0129] The clutch mechanism 300 maintains a transmission connection with the deceleration output section 222 of the deceleration mechanism 200, and the clutch mechanism 300 can always receive the driving power from the deceleration output section 222. The clutch mechanism 300 is either transmissionally connected to or disconnected from the linkage mechanism 400. In the engaged position, the clutch mechanism 300 is transmissionally connected to the mating section 410 of the linkage mechanism 400, and the clutch mechanism 300 can transmit the driving power of the drive mechanism 100 to the mating section 410 of the linkage mechanism 400. Alternatively, in the disengaged position, the clutch mechanism 300 is disconnected from the mating section 410 of the linkage mechanism 400.

[0130] When the clutch mechanism 300 switches from the disengaged position to the engaged position, based on the driving force of the drive mechanism 100, the clutch output part of the clutch mechanism 300 moves to connect with the mating part 410. The drive mechanism 100 then drives the clutch mechanism 300 to the engaged position, thus activating the drive mechanism 100 and automatically switching the clutch mechanism 300 to the engaged position for automatic opening and closing of the door. When the clutch mechanism 300 switches from the engaged position to the disengaged position, the clutch output part moves to disengage from the mating part 410, allowing the mating part 410 to move autonomously. This means that when the user manually opens and closes the door, the linkage mechanism 400 can move with the door opening and closing without interfering with the clutch mechanism 300.

[0131] It is understood that the clutch mechanism 300 includes a connecting part 350 connected to the clutch output part, the connecting part 350 is connected to the deceleration output part 222, the clutch output part is drivenly connected to the deceleration output part 222, and both the connecting part 350 and the clutch output part are connected to the deceleration output part 222.

[0132] The connecting part 350 can be switched between the starting position and the stop position, see reference. Figure 18 and Figure 19 As shown, in the initial position, the connecting part 350 and the deceleration output part 222 can rotate synchronously, and the deceleration output part 222 can drive the clutch output part and the connecting part 350 to rotate synchronously. At this time, the clutch output part and the deceleration output part 222 maintain a transmission connection, and the power of the deceleration output part 222 can be transmitted to the clutch output part. However, the clutch output part and the mating part 410 are disconnected from the transmission, and the power of the clutch output part cannot be transmitted to the mating part 410. The clutch output part cannot drive the linkage mechanism 400 to move.

[0133] In the stop position (not shown in the figure), the connecting part 350 stops and no longer rotates with the deceleration output part 222. The connecting part 350 remains in the stop position, and the clutch output part can move relative to the connecting part 350. The deceleration output part 222, the clutch output part and the mating part 410 are connected by transmission. The linkage mechanism 400 can be driven by the power of the drive mechanism 100 to drive the door body 500 to open and close.

[0134] When the connecting part 350 is in the initial position, it corresponds to the clutch mechanism 300 being in the disengaged position; when the connecting part 350 is in the stop position, it corresponds to the clutch mechanism 300 being in the engaged position. Between the initial position and the stop position, the connecting part 350 and the deceleration output part 222 can rotate synchronously.

[0135] The transmission methods between the clutch output section and the deceleration output section 222, and between the clutch output section and the mating section 410, can be the same or different. The transmission methods can be gear meshing transmission, sprocket transmission, belt transmission, linkage transmission, etc. There are various transmission methods, which can be selected according to needs.

[0136] refer to Figure 18 and Figure 19 As shown, the deceleration output unit 222 and the clutch output unit, as well as the clutch output unit and the mating part 410, are all driven by meshing. The deceleration output unit 222 is provided with a first gear 2222, the clutch output unit is provided with a second gear 360, and the mating part 410 is provided with a third gear 411. The first gear 2222 and the second gear 360 are kept in meshing transmission, and the second gear 360 and the third gear 411 are engaged or disengaged. The meshing transmission method is simple and has good transmission stability.

[0137] The first gear 2222, the second gear 360, and the third gear 411 are configured as external gears, with the second gear 360 and the third gear 411 both located on the outer periphery of the first gear 2222.

[0138] The second gear 360 is rotatably connected to the connecting part 350. The second gear 360 and the connecting part 350 are rotatably connected via a shaft, ensuring that the second gear 360 and the connecting part 350 can rotate synchronously around the rotation axis of the first gear 2222. The third gear 411 is rotatably connected to the second housing 130. The second housing 130 radially limits the third gear 411. When the connecting part 350 moves to the stop position, the second gear 360 and the third gear 411 mesh and transmit power. The third gear 411 also limits the second gear 360, preventing the second gear 360 and the connecting part 350 from rotating around the axis of the reduction output part 222, thus keeping the connecting part 350 in the stop position. It should be noted that the linkage mechanism 400 includes a mating part 410 and a connecting rod (the connecting rod may include, but is not limited to, the first connecting rod 420 and the second connecting rod 430 described below). The end of the connecting rod is fixedly connected to the mating part 410, so that the end of the connecting rod rotates synchronously with the mating part 410.

[0139] refer to Figure 21 and Figure 22As shown, the reduction output unit 222 is provided with a connecting shaft section 2223, which is located on at least one side of the first gear 2222 along its axial direction. A connecting part 350 is sleeved on the outside of the connecting shaft section 2223. The connecting part 350 can rotate synchronously with the connecting shaft section 2223 (connecting part 350 in the initial position), and the connecting shaft section 2223 can also rotate relative to the connecting part 350 (connecting part 350 in the stopped position). It should be noted that there is friction between the connecting shaft section 2223 and the connecting part 350 to ensure that the connecting part 350 can rotate synchronously with the connecting shaft section 2223. The friction between the connecting shaft section 2223 and the connecting part 350 is small and will not affect their relative rotation. Based on the meshing of the first gear 2222 and the second gear 360, the first gear 2222 also transmits rotational power to the second gear 360 so that the second gear 360 can quickly mesh with the third gear 411.

[0140] refer to Figures 18 to 20 As shown, the connecting part 350 has a hollow structure to avoid obstructing the deceleration output part 222. The connecting part 350 can be a plate structure, with the clutch output part connected to one side of the connecting part 350; alternatively, the connecting part 350 can be a frame structure, comprising two connected connecting plates with identical structures. The clutch output part is clamped between the two connecting plates, with corresponding connecting plates connected to both ends of the clutch output part. The connecting plates not only connect the clutch output part but also protect it. The two connecting plates can be fixedly connected using various methods such as plugging, snapping, and riveting.

[0141] refer to Figure 18 and Figure 19 As shown, the connecting part 350 is connected to two second gears 360. The second gears 360 are located on both sides of the center line connecting the first gear 2222 and the third gear 411. Regardless of whether the first gear 2222 rotates clockwise or counterclockwise, one of the second gears 360 can mesh with the third gear 411 to transmit rotational power. That is, the door opening and closing device can drive the door 500 to open and close.

[0142] refer to Figure 18 and Figure 19 As shown, on both sides of the center line connecting the first gear 2222 and the third gear 411, there are two second gears 360 with the same structure and size symmetrically arranged.

[0143] It should be noted that the above content describes the switching of the clutch mechanism 300 from the disengaged position to the engaged position, and the transmission method of the clutch mechanism 300 in the engaged position. The following describes the return of the clutch mechanism 300 from the engaged position to the disengaged position.

[0144] refer to Figure 18 , Figure 19 and Figure 21 As shown, the clutch mechanism 300 also includes a reset part 370. One end of the reset part 370 is positioned with the stator 110, and the other end of the reset part 370 is connected to the connecting part 350. The reset part 370 is used to drive the connecting part 350 from the stop position to the start position so that the connecting part 350 returns to the start position, the clutch mechanism 300 switches to the disengaged position, and the clutch mechanism 300 no longer transmits rotational power to the linkage mechanism 400.

[0145] Since the clutch mechanism 300 is normally in the disengaged position and the connecting part 350 is normally in the initial position, the connecting part 350 can be kept in the initial position by the reset part 370 to facilitate manual opening and closing of the door by the user.

[0146] One end of the reset part 370 is positioned with the stator 110. This can be understood as the reset part 370 being fixed to the stator 110 or the second housing 130, with the stator 110 or the second housing 130 limiting the reset part 370 and ensuring the structural stability of one end of the reset part 370. The other end of the reset part 370 is connected to the connecting part 350, such as by abutment or snap-fit, so that the connecting part 350 can be returned to its initial position by the movement of the other end of the reset part 370 relative to the first end of the reset part 370.

[0147] The reset unit 370 can drive the connecting unit 350 back to the starting position in a variety of ways, such as linear movement or rotational movement.

[0148] It is understood that the reset part 370 includes a second elastic member 371. One end of the second elastic member 371 is connected to the stator 110, and the other end of the second elastic member 371 is connected to the connecting part 350. In the stop position, the second elastic member 371 is in an elastic deformation state. The restoring force of the second elastic member 371 drives the connecting part 350 to switch from the stop position to the start position.

[0149] The second elastic element 371 can be a spring, torsion spring, etc. (See reference) Figure 19 As shown, the second elastic element 371 is a spring.

[0150] It should be noted that the reset part 370 can, but is not limited to, drive the connecting part 350 back to the starting position through the second elastic member 371. The reset part 370 can also provide restoring force through a motor or cylinder.

[0151] Understandably, the connecting part 350 is provided with a guide surface 354, and the reset part 370 remains abutting against the guide surface 354. Moving away from the starting position, the distance between the guide surface 354 and the rotation axis of the deceleration output part 222 increases. During the movement of the connecting part 350, as it moves away from the starting position, the gap between the guide surface 354 and the inner ring of the stator 110 decreases, and the reset part 370 is compressed and undergoes elastic deformation until the connecting part 350 reaches the stop position, at which point the reset part 370 remains in an elastically deformed state. When the deceleration output part 222 stops outputting rotational power, the restoring force of the reset part 370 drives the connecting part 350 to return from the stop position to the starting position.

[0152] Guide surfaces 354 are provided on both sides of the reset part 370. The connecting part 350 rotates clockwise and counterclockwise with the deceleration output part 222, and the reset part 370 abuts against the guide surfaces 354 in both cases. The connecting part 350 may be provided with symmetrical guide surfaces 354, with the line connecting the centers of the first gear 2222 and the third gear 411 as the axis of symmetry, and the guide surfaces 354 are symmetrically arranged.

[0153] Understandably, reference Figure 21 and Figure 22 As shown, the connecting part 350 includes a first connecting plate 351, a second connecting plate 352, and a reinforcing member 353. The clutch output part is connected between the first connecting plate 351 and the second connecting plate 352. At least one of the first connecting plate 351 and the second connecting plate 352 is also connected to the connecting shaft section 2223 of the deceleration output part 222. The reinforcing member 353 is disposed between the first connecting plate 351 and the second connecting plate 352. The first connecting plate 351, the second connecting plate 352, and the reinforcing member 353 cooperate to form a guide surface 354. The reinforcing member 353 serves not only to connect the first connecting plate 351 and the second connecting plate 352, but also to connect the guiding and limiting reset part 370. By providing the reinforcing member 353 between the first connecting plate 351 and the second connecting plate 352, the connection stability between the first connecting plate 351 and the second connecting plate 352 can be enhanced. It can also be adapted to the reset part 370, facilitating the positioning of the reset part 370.

[0154] The reinforcing member 353 can be connected to the first connecting plate 351 and the second connecting plate 352 through methods such as plugging, snapping, or fastener connection. (Reference) Figure 20 As shown, the first connecting plate 351 and the second connecting plate 352 have grooves 3521, and the reinforcing member 353 is inserted into the grooves 3521 and connects the first connecting plate 351 and the second connecting plate 352. Both the first connecting plate 351 and the second connecting plate 352 have mounting holes, and the shaft of the second gear 360 is connected to the mounting holes.

[0155] Understandably, reference Figure 19As shown, the reset part 370 includes a guide member 372. The end of the guide member 372 abuts against the guide surface 354. The guide member 372 guides and connects to the second elastic member 371. By abutting against the guide surface 354, the guide member 372 can protect the second elastic member 371 and prevent the end of the second elastic member 371 from directly contacting the guide surface 354, thereby improving the contact stability between the reset part 370 and the guide surface 354.

[0156] At least one end of the second elastic element 371 is confined to the guide element 372. This can be understood as follows: one end of the second elastic element 371 is confined to the guide element 372, and the other end of the second elastic element 371 is fixedly connected to at least one of the stator frame 112 and the second housing 130. One of the guide element 372 and the second elastic element 371 is sleeved on the outside of the other, so that the guide element 372 serves to guide and limit the second elastic element 371. Alternatively, it can be understood that both ends of the second elastic element 371 are confined to the guide element 372. One end of the guide element 372 abuts against the guide surface 354, and the other end of the guide element 372 abuts against at least one of the stator frame 112 and the second housing 130. The guide element 372 has a telescopic function to accommodate the elastic expansion and contraction of the second elastic element 371. The cooperation method between the guide element 372 and the second elastic element 371 is simple and can be selected according to actual needs.

[0157] Understandably, reference Figure 19 As shown, at least one of the first connecting plate 351, the second connecting plate 352 and the reinforcing member 353 is provided with a recess 355. In the initial position, the guide member 372 is limited within the recess 355 so that the guide member 372 is stably held in the initial position, ensuring the stability of the fit between the guide member 372 and the connecting member 350.

[0158] It is understandable that the end of the guide member 372 is provided with a spherical part 373. In the initial position, the spherical part 373 is confined within the concave portion 355. The spherical part 373 and the concave portion 355 are engaged by a spherical surface, which can reduce the resistance of the relative movement between the spherical part 373 and the concave portion 355 and improve the flexibility of the guide member 372.

[0159] The spherical part 373 is adapted to the concave part 355. The surface of the concave part 355 is a concave spherical surface adapted to the spherical part 373, ensuring the stability of the fit between the spherical part 373 and the concave part 355. The concave part 355 is connected to the aforementioned guide surface 354, which is disposed on both sides of the concave part 355.

[0160] refer to Figure 21 and Figure 22 As shown, the connecting part 350, the reset part 370 and the clutch output part are all disposed between the first connecting member 220 and the second housing 130.

[0161] The above describes the implementation of the clutch mechanism 300. The linkage mechanism 400 will be described below.

[0162] Regarding linkage mechanism 400:

[0163] refer to Figure 11 As shown, one end of the linkage mechanism 400 is provided with a mating part 410, which is used to cooperate with the drive mechanism 100. The driving power of the drive mechanism 100 is transmitted to the linkage mechanism 400 through the mating part 410. The other end of the linkage mechanism 400 is provided with a mounting part 440, which is used to connect the door 500 or the cabinet 600 to push the door 500 to open or close relative to the cabinet 600.

[0164] It should be noted that a clutch mechanism 300 may be provided between the linkage mechanism 400 and the drive mechanism 100, but is not limited to this. When the door opening and closing device does not have a clutch mechanism 300, the linkage mechanism 400 and the drive mechanism 100 can always maintain a transmission connection, and the door 500 can be opened and closed by the driving force of the drive mechanism 100, but cannot be opened and closed manually.

[0165] Understandably, one end of the linkage mechanism 400 is provided with a mating part 410, which is driven by the output shaft 123 to rotate. The rotation axis of the mating part 410 is parallel to the rotation axis of the output shaft 123. When the output shaft 123 is connected to a reduction mechanism 200, the reduction output part 222 of the reduction mechanism 200 is driven by the mating part 410. After reduction by the reduction mechanism 200, the rotational power is transmitted to the mating part 410 to adjust the rotational speed of the mating part 410 to adapt to the door opening and closing speed. Alternatively, the output shaft 123 can be directly driven by the mating part 410, omitting the reduction mechanism 200. In this case, the rotational speed of the output shaft 123 of the drive mechanism 100 needs to match the door opening and closing speed.

[0166] In some cases, the sensing element 121 of the rotor 120 is located on the outer ring of the stator 110, and the output shaft 123 passes through the mounting space 111 of the inner ring of the stator 110. The mating part 410 is also located within the mounting space 111 to facilitate the transmission engagement between the mating part 410 and the reduction output part 222 (or the output shaft 123). (Reference) Figure 21 As shown, a clutch mechanism 300 is provided in the installation space 111, and the mating part 410 is transversely connected to the clutch mechanism 300 to drive the mating part 410 to move.

[0167] refer to Figure 11 As shown, the mating part 410 is rotatably connected to the second housing 130, so that one end of the linkage mechanism 400 forms a first hinge point.

[0168] Understandably, reference Figure 11 As shown, the linkage mechanism 400 includes a first link 420 and a second link 430 that are rotatably connected. A second hinge point is formed between the first link 420 and the second link 430. The end of the first link 420 away from the second link 430 is fixed to a fitting part 410. A mounting part 440 is provided at the end of the second link 430 away from the first link 420. The mounting part 440 is rotatably connected to the door 500 or the cabinet 600, forming a third hinge point. A door hinge rotatably connected to the door 500 relative to the cabinet 600 forms a fourth hinge point. The connection between the fourth hinge point and the third hinge point can be understood as a third link, and the connection between the fourth hinge point and the first hinge point can be understood as a fourth link. Combined with the first link 420 and the second link 430, a four-link structure is formed to stably push the door 500 to open or close.

[0169] The first connecting rod 420 is a straight rod with a simple structure. One end of the first connecting rod 420 is fixedly connected to the mating part 410 (the aforementioned third gear 411), and the other end of the first connecting rod 420 is rotatably connected to the second connecting rod 430. Both the first connecting rod 420 and the third gear 411 are fixedly connected to a connecting shaft, so that the rotational power of the third gear 411 is transmitted to the first connecting rod 420 through the connecting shaft. The connecting shaft passes through the second housing 130 and is rotatably connected to the second housing 130.

[0170] refer to Figure 11 As shown, the second link 430 includes a first arc-shaped segment 431 and a second arc-shaped segment 432 connected to each other. The connecting ends of the first arc-shaped segment 431 and the second arc-shaped segment 432 are tangent. The first arc-shaped segment 431 and the second arc-shaped segment 432 are bent in opposite directions to balance the force on the second link 430. Figure 11 In the middle, the first arc segment 431 and the second arc segment 432 are separated by a dashed line.

[0171] The second arc segment 432 is located between the first arc segment 431 and the mounting part 440. When the mounting part 440 is connected to the door body 500, the curvature of the second arc segment 432 ensures that it can avoid the components on the door body 500 and avoid interference with the components on the door body 500.

[0172] The first arc segment 431 is located between the second hinge point and the second arc segment 432. The first arc segment 431 can stabilize the force on the second connecting rod 430, and the second connecting rod 430 can also avoid the components installed on the cabinet 600. The first arc segment 431 extends from the second hinge point to the front end of the cabinet 600. The length of the first arc segment 431 is greater than that of the second arc segment 432.

[0173] refer to Figure 11As shown, the door opening and closing device is also equipped with a first detection element 450 and a second detection element 460. Both the first detection element 450 and the second detection element 460 are located on the movement path of the first link 420. When the door 500 is opened to its maximum, the first detection element 450 is triggered by the first link 420, and the drive mechanism 100 stops providing driving force. When the door 500 is completely closed, the second detection element 460 is triggered by the first link 420, and the drive mechanism 100 stops providing driving force. Of course, the first detection element 450 and the second detection element 460 can also be set on the movement path of the second link 430 (not shown in the figure), and the drive mechanism 100 is controlled by detecting the position of the second link 430. The first detection element 450 and the second detection element 460 can be triggered by contact or by induction. The structures of the first detection element 450 and the second detection element 460 are diverse, such as being set as photoelectric switches, contact switches, etc. Of course, the first detection element 450 and the second detection element 460 can also be installed in the door opening and closing device, such as in the second housing 130 or the stator frame 112 (not shown in the figure).

[0174] When the door opening and closing device is installed on the top of the cabinet 600, and the mounting part 440 of the linkage mechanism 400 is hinged to the door 500, the first detection element 450 and the second detection element 460 can be installed on the top surface of the cabinet 600. The installation of the first detection element 450 and the second detection element 460 is simple and the installation accuracy is high.

[0175] The door opening and closing device described above is applicable to various connection methods between the cabinet 600 and the door 500 via hinges 700, such as automatic opening and closing doors that are compatible with multi-link hinges (DOD hinges), dual-axis hinges, and single-axis hinges.

[0176] The door opening and closing device comprises four parts: a drive mechanism 100, which utilizes the principle of a DC brushless direct drive motor (DDM motor principle), a reduction mechanism 200, a clutch mechanism 300, and a linkage mechanism 400. The rotor 120 is driven to rotate by the induced electromotive force between the rotor 120 and the stator 110. The rotor 120 drives the reduction mechanism 200, which transmits torque to the door body 500 through the linkage mechanism 400, thus achieving automatic door opening and closing. This device features low cost, high integration, and high versatility, and exhibits no jamming or damage during manual door opening and closing. By combining a DDM motor as the drive mechanism 100, a differential gear reduction mechanism 200, an overrunning clutch mechanism 300, and a four-bar linkage mechanism 400, the motor, reducer, and clutch are integrated into an automatic door opening and closing device, a solution that can keep the cost below 100 yuan.

[0177] The drive mechanism 100 employs a DDM direct-drive ultra-thin motor, which consists of four parts: a stator frame 112, stator windings, a stator core, magnets, an outer rotor 120, and bearings. When the stator windings are energized, they generate a magnetic field, driving the outer rotor 120 to rotate, which in turn drives the reduction mechanism 200 to rotate, outputting torque and achieving low speed, high torque, and a small reduction ratio. The reduction mechanism 200 consists of three planetary gears: the inner gear 230 is fixed to the stator 110, and the outer gear 210 is a double-toothed gear that performs eccentric motion, driving the first connecting member 220 to perform a reduction motion. The first connecting member 220 outputs rotational power to the clutch mechanism 300. The reduction mechanism 200 is integrated into a planetary differential gear reduction system; three gears can achieve a reduction ratio of over 100, resulting in lower cost and more efficient space utilization.

[0178] refer to Figures 11 to 17 The clutch mechanism 300 shown includes four parts: a moving part 310, a mating ring 2221 of the reduction output part 222, a first rotating part 320, and a second rotating part 330. The mating ring 2221 drives the first rotating part 320 to rotate, and the first rotating part 320 drives the second rotating part 330 to rotate via ball bearings. The gears on the outer ring of the second rotating part 330 move, realizing torque transmission. The mating ring 2221, the moving part 310, and the first rotating part 320 move together, and the mating ring 2221 stops, which can interrupt torque transmission at any time, realizing the overrunning clutch function. The clutch mechanism 300 has a bidirectional overrunning clutch function, allowing free switching between manual and electric operation.

[0179] The clutch mechanism 300 and the linkage mechanism 400 work together to achieve power transmission. The linkage mechanism 400 and the hinge 700 work together to form a four-bar linkage. Torque transmission relies on the four-bar linkage, which is a stepless transmission, reducing the difficulty of software development. The ejection mechanism can be eliminated, and the ejection and rotation can be truly integrated into one design.

[0180] The door opening and closing device provided by the present invention can be adapted to the opening and closing of door bodies 500 with single-axis, double-axis and DOD hinge installation.

[0181] According to a second aspect of the present invention, an electrical device is provided, including a cabinet 600, a door 500, and a door opening and closing device as described above. A drive mechanism 100 is installed in one of the cabinet 600 and the door 500, and a mounting portion 440 of a linkage mechanism 400 is connected to the other of the cabinet 600 and the door 500, so that the power of the drive mechanism 100 is transmitted to the door 500 through the linkage mechanism 400, so that the door 500 opens and closes relative to the cabinet 600.

[0182] Electrical appliances can include refrigerators, freezers, display cases, vending machines, cabinets, dishwashers, steam ovens, ovens, and other similar equipment. There are many types of electrical appliances, and any electrical appliance that requires opening and closing a door can be equipped with the aforementioned door opening and closing devices.

[0183] refer to Figure 1 and Figure 23 As shown, the refrigerator door opening and closing device is installed in the cabinet 600, and the mounting part 440 of the linkage mechanism 400 is hinged to the mounting seat 510 of the door 500. The driving force is transmitted to the door 500 through the linkage mechanism 400.

[0184] The above embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Although the invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the invention do not depart from the spirit and scope of the invention and should be covered within the scope of the claims of the invention.

Claims

1. A door opening and closing device, characterized in that, include: A drive mechanism, including a stator and a rotor, the rotor including an output shaft rotatable relative to the stator; A speed reduction mechanism is connected to the output shaft; The clutch mechanism is rotatably connected to the output shaft; A linkage mechanism, one end of which is connected to the clutch output part of the clutch mechanism, and the other end of which is provided with a mounting part for connecting a door or cabinet. The clutch mechanism can switch between a disengaged position and an engaged position. In the engaged position, the deceleration output of the deceleration mechanism is connected to the clutch mechanism. In the disengaged position, the deceleration output is disconnected from the clutch mechanism. The clutch mechanism is moved from the disengaged position to the engaged position by rotating the output shaft, and the clutch output actively moves to switch the clutch mechanism from the engaged position to the disengaged position. The deceleration output section is provided with a mating ring, and the clutch mechanism includes a moving component, a first rotating component, and a second rotating component. The first rotating component and the second rotating component are rotatably connected to the output shaft. The first rotating component is provided with a first limiting part, and the second rotating component is provided with a second limiting part and a clutch output section. The first limiting part and the second limiting part are both provided in the inner ring of the mating ring, and the moving component is located between the first limiting part and the second limiting part. Based on the rotation of the output shaft relative to the stator, the rotation of the mating ring drives the moving part to move between the first limiting part and the second limiting part until the moving part, the first rotating part, the second rotating part and the mating ring rotate synchronously, and the clutch mechanism switches to the engagement position.

2. The door opening and closing device according to claim 1, characterized in that, The first rotating member is provided with a limiting surface. In the engaged position, the limiting surface and the inner wall of the mating ring lock the moving member; in the disengaged position, at least one of the limiting surface and the inner wall of the mating ring can move relative to the moving member.

3. The door opening and closing device according to claim 2, characterized in that, The radial distance from the limiting surface to the inner wall of the mating ring gradually increases in the direction closer to the first limiting part.

4. The door opening and closing device according to claim 1, characterized in that, A first elastic element is provided between the moving component and the first rotating component. In the engagement position, the first elastic element is in an elastic deformation state so that the clutch mechanism can be driven to switch from the engagement position to the disengagement position by the restoring force of the first elastic element.

5. The door opening and closing device according to claim 4, characterized in that, Both sides of the second limiting part are provided with a set of the first limiting part, the moving part and the first elastic part.

6. The door opening and closing device according to claim 1, characterized in that, The inner ring of the second rotating member has a mounting groove, and the bottom wall of the mounting groove is connected with a plurality of second limiting parts along the circumferential direction. At the engagement position, the inner wall of the mounting groove, the wall surface of the mating ring, and the moving member are locked together.

7. The door opening and closing device according to any one of claims 1 to 6, characterized in that, The clutch output section is provided with a third external gear ring, and the linkage mechanism includes a connecting rod and a third gear rotatably connected to one end of the connecting rod. The third gear meshes with the third external gear ring, and the other end of the connecting rod is provided with the mounting section.

8. The door opening and closing device according to claim 7, characterized in that, The connecting rod includes a first connecting rod and a second connecting rod that are hinged together. The first connecting rod is fixedly connected to the third gear, and the second connecting rod is provided with the mounting part.

9. The door opening and closing device according to any one of claims 1 to 6, characterized in that, The deceleration mechanism includes an external gear and a first connecting member. The external gear is eccentrically rotatably connected to the output shaft, and the first connecting member is rotatably connected to the output shaft. The first connecting member is provided with a first internal gear ring, and the external gear is provided with a first external gear ring. The first external gear ring meshes with the first internal gear ring for transmission, and the number of teeth on the first internal gear ring is greater than the number of teeth on the first external gear ring.

10. The door opening and closing device according to claim 9, characterized in that, The deceleration output section is provided with a mating ring, which is located on the first connector and is coaxially arranged with the first internal gear ring.

11. The door opening and closing device according to claim 9, characterized in that, The reduction mechanism further includes an internal gear component fixed to the stator. The internal gear component is provided with a second internal gear ring, and the external gear component is also provided with a second external gear ring coaxial with the first external gear ring. The second external gear ring meshes with the second internal gear ring for transmission, and the number of teeth of the second internal gear ring is greater than the number of teeth of the second external gear ring.

12. The door opening and closing device according to any one of claims 1 to 6, characterized in that, The inner ring of the stator is provided with the deceleration mechanism and the clutch mechanism.

13. The door opening and closing device according to any one of claims 1 to 6, characterized in that, The rotor includes a first housing and a circumferential sensing part disposed on the first housing. The first housing connects the sensing part to the output shaft. The first housing covers at least one end of the stator in the axial direction. The sensing part is disposed on the outer periphery of the stator.

14. An electrical appliance, characterized in that, The device includes a cabinet, a door, and a door opening and closing device as described in any one of claims 1 to 13, wherein the drive mechanism is mounted on one of the cabinet and the door, and the mounting portion is hinged to the other of the cabinet and the door.

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