Automatic door opening device and refrigerator

Abstract

The utility model discloses an automatic door opening device and a refrigerator, and belongs to the technical field of electrical equipment. The automatic door opening device comprises a driving part; the transmission assembly comprises a first gear, a cycloid speed reducing mechanism and a second gear, the first gear is meshed with the driving part, and the input end and the output end of the cycloid speed reducing mechanism are connected with the first gear and the second gear respectively; and the door jacking piece is meshed with the second gear. The automatic door opening device and the refrigerator are small in overall height and simple in structure.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of electrical appliances, and particularly relates to an automatic door opening device and a refrigerator. BACKGROUND

[0002] Some refrigerator products are configured with an automatic door opening device for driving the door body to automatically open, thereby improving the convenience of using the refrigerator. Generally, the automatic door opening device is configured with a driving motor, a transmission gear set, and a top rod and other components, and the torque output by the driving motor is converted into a top rod pushing torque through the transmission gear set, so as to push open the door body.

[0003] Since the opening door resistance between the door body and the cabinet is large, the transmission gear set is required to have a large reduction ratio, so that the force transmitted to the top rod can meet the requirement of pushing open the door body. Therefore, the transmission gear set needs to be configured with multiple levels of gears, which leads to a complex overall structure of the transmission gear, a large layout area and height, and a large overall size of the door opening mechanism, thereby requiring a larger installation space on the refrigerator, which increases the difficulty of installing the refrigerator. SUMMARY

[0004] The present application provides an automatic door opening device and a refrigerator, which aims to at least solve the technical problem of complex structure and large height of the transmission gear set of the automatic door opening mechanism. To this end,

[0005] In one aspect of the present application, an automatic door opening device is provided, which comprises:

[0006] a driving member;

[0007] a transmission assembly comprising a first gear, a cycloid reduction mechanism, and a second gear, the first gear being engaged with the driving member, the input end and the output end of the cycloid reduction mechanism being connected with the first gear and the second gear respectively;

[0008] a door opening member engaged with the second gear.

[0009] In some embodiments, the cycloid reduction mechanism comprises:

[0010] a housing, a first annular gear being arranged on the inner wall of the housing;

[0011] a cycloid disc arranged in the housing, a second annular gear being arranged on the outer circumferential surface of the cycloid disc, part of the second annular gear being engaged with the first annular gear, and the cycloid disc being power-coupled with the second gear as the output end of the cycloid reduction mechanism;

[0012] an input shaft, one end of the input shaft being connected with the first gear, the other end of the input shaft being rotationally matched with the cycloid disc, and the input shaft and the cycloid disc being eccentrically arranged.

[0013] In some embodiments, the cycloid disc is provided with a cycloid disc hole in the thickness direction, and the cycloid reduction mechanism further comprises an output shaft arranged on the second gear in the axial direction of the rotation shaft of the second gear;

[0014] The output shaft is arranged in the cycloid disc hole, and the outer circumferential surface of the output shaft is in sliding fit with the inner wall surface of the cycloid disc hole, so that when the input shaft rotates following the first gear, the cycloid disc rotates eccentrically, the cycloid disc hole pushes the output shaft to move, thereby rotating the second gear.

[0015] In some embodiments, the cycloid reduction mechanism further comprises an output shaft seat connected between the second gear and the output shaft, and the output shaft is a plurality of output shafts, which are arranged at equal intervals around the circumferential side of the rotation axis of the second gear.

[0016] In some embodiments, the first gear, the output shaft seat and the second gear are coaxially arranged, and the input shaft is in rotational fit with the second gear and the output shaft seat.

[0017] In some embodiments, the cycloid disc is provided with an axle hole in the thickness direction, and the cycloid reduction mechanism further comprises an eccentric bearing sleeved on the input shaft and clamped in the axle hole.

[0018] In some embodiments, the cycloid disc is two, the two cycloid discs are arranged at intervals in the axial direction of the input shaft, and the eccentric directions of the two cycloid discs are opposite.

[0019] In some embodiments, the transmission assembly further comprises:

[0020] The first double gear has a coaxially arranged first circular tooth part and a first non-circular tooth part, and the first circular tooth part is in meshing fit with the second gear.

[0021] The second double gear has a coaxially arranged second circular tooth part and a second non-circular tooth part, the second circular tooth part is in meshing fit with the top door part, the second non-circular tooth part is in meshing fit with the first non-circular tooth part, and the speed ratio of the first non-circular tooth part and the second non-circular tooth part shows a decreasing trend during the process that the top door part pushes the door body.

[0022] In some embodiments, the first non-circular tooth part and the second non-circular tooth part are both elliptical tooth parts with the same specifications, and the length of the connecting line of the rotation shafts of the first non-circular tooth part and the second non-circular tooth part is the length of the major axis of the elliptical tooth part.

[0023] Another aspect of the embodiments of the present application also provides a refrigerator, comprising:

[0024] The device body comprises a cabinet and a door body, and the door body is arranged on the cabinet;

[0025] The automatic door opening device is installed on the cabinet, and drives the door body to open relative to the cabinet during the process of the top door piece pushing the door body.

[0026] The embodiments of the present application have at least the following beneficial effects:

[0027] The automatic door opening device and the refrigerator provided by the embodiments of the present application comprise a driving piece, a transmission mechanism and a top door piece, the driving piece is in transmission connection with the top door piece through a transmission assembly to realize a mechanical door opening device; the transmission assembly comprises a first gear, a cycloid speed reduction mechanism and a second gear which are integrally arranged, the first gear is engaged with the driving piece, the second gear is engaged with the top door piece, and the cycloid speed reduction mechanism is connected with the first gear and the second gear respectively, and a large speed reduction ratio transmission between the driving piece and the top door piece is realized through the cycloid speed reduction mechanism, so that the number of gear and layer is reduced to a certain extent under the condition of meeting the large speed reduction ratio, and the complexity and height of the transmission assembly and the automatic door opening device as a whole are reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0029] Figure 1 The structure schematic diagram of the automatic door opening device in the embodiments of the present application is shown;

[0030] Figure 2 The structure schematic diagram of the transmission assembly in the door opening device in Figure 1 is shown;

[0031] Figure 3 The partial sectional view of the transmission assembly in Figure 2 is shown;

[0032] Figure 4 The structure schematic diagram of the cycloid speed reduction mechanism in the transmission assembly in Figure 2 is shown;

[0033] Figure 5 Another angle structure schematic diagram of the cycloid speed reduction mechanism in the transmission assembly in Figure 2 is shown;

[0034] Figure 6 The structure schematic diagram of the input shaft in the transmission assembly in Figure 2 is shown.

[0035] Reference signs:

[0036] 1 - driving member, 11 - motor, 12 - worm;

[0037] 2 - transmission assembly, 21 - first gear, 22 - cycloid reduction mechanism, 221 - housing, 221a - first annular tooth, 222 - cycloid disc, 222a - second annular tooth, 222b - cycloid disc hole, 222c - shaft hole, 223 - input shaft, 223a - eccentric bearing, 23 - second gear, 24 - first double gear, 241 - first circular tooth part, 242 - second non-circular tooth part, 25 - second double gear, 251 - second circular tooth part, 252 - second non-circular tooth part, 26 - first adapter gear, 27 - second adapter gear;

[0038] 3 - top door member;

[0039] 4 - installation base. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0041] In addition, reference numbers and / or reference letters can be repeated in different examples in the present application, and such repetition is for the purpose of simplification and clarity, and does not indicate the relationship between the various embodiments and / or arrangements discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0042] The present application will be described below in combination with the drawings and with reference to specific embodiments:

[0043] The negative pressure between the door body and the cabinet of the refrigerator and the door opening resistance increase the difficulty of the door opening operation to some extent. Therefore, some refrigerator products are provided with an automatic door opening device for realizing automatic door opening operation and improving the convenience of the refrigerator door opening operation. Usually, in order to overcome the door opening resistance, a gear transmission assembly with a large reduction ratio needs to be configured between the driving member and the top door member in the automatic door opening device, which results in a large number of transmission gears and a large number of layers, and the overall structure of the gear transmission assembly is complex, the installation height and the spreading area are large, and a larger installation height and installation area need to be allocated in the refrigerator, which is not conducive to being configured and installed on the refrigerator.

[0044] To this end, the embodiment of the present application provides an automatic door opening device and a refrigerator, which aims to reduce the complexity of the gear transmission assembly, thin the overall height, and reduce the spreading area, so as to reduce the structural complexity, height and volume of the door opening device, and improve the assembly applicability of the automatic door opening device.

[0045] Figure 1 The structure schematic diagram of the automatic door opening device in the embodiment of the present application is shown; Figure 2 The structure schematic diagram of the transmission assembly in the door opening device in Figure 1 is shown; Figure 3 The partial cross-sectional view of the transmission assembly in Figure 2 is shown; Figure 4 The structure schematic diagram of the cycloid speed reduction mechanism in the transmission assembly in Figure 2 is shown; Figure 5 Another angle structure schematic diagram of the cycloid speed reduction mechanism in the transmission assembly in Figure 2 is shown.

[0046] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , in some embodiments, the automatic door opening device adopts a mechanical device based on a transmission gear set, which comprises a driving member 1, a transmission assembly 2 and a top door member 3, the transmission mechanism 2 is connected with the driving member 1 and the top door member 3 respectively, so that the driving member 1 outputs a driving torque which is transmitted to the top door member 3 through the transmission assembly 2, to push the refrigerator door body to deflect relative to the cabinet, so as to realize the door opening operation.

[0047] The driving member 1 is a driving torque output device, which can output various forms of driving torque such as torque. In the automatic door opening device, the driving member 1 can be configured as a motor 11, and by controlling the power signal loaded on the motor 11, the working and stopping of the driving member 1 and the size of the driving torque can be realized.

[0048] The top door member 3 is the main body which directly acts on the refrigerator door body, and pushes the door body under the action of external force to realize the door opening operation. The movement form of the top door member 3 can be configured as linear movement, arc movement or other movement forms.

[0049] The transmission assembly 2 is used for receiving the driving torque output by the driving member 1 and transmitting it to the top door member 3; in the process of transmitting the driving torque, a certain degree of speed reduction is performed. In order to meet the requirement of breaking through the door opening resistance of the automatic door opening mechanism, the transmission assembly 2 needs to have a large speed reduction ratio.

[0050] The transmission assembly 2 is a gear transmission mode mechanism, which can include a first gear 21, a cycloid reduction mechanism 22, and a second gear 22, the first gear 21 is matched and engaged with the driving member 1, the second gear 23 is matched and engaged with the top door member 3, the cycloid reduction mechanism 22 is connected with the first gear 21 and the second gear 23, so as to transmit the driving torque output by the driving member 1 to the top door member 3 to drive the top door member 3 to push the door body open.

[0051] The input end of the cycloid reduction mechanism 22 is connected with the first gear 21, and the output end of the cycloid reduction mechanism 22 is connected with the second gear 23, so as to realize large reduction ratio transmission between the driving member 1 and the top door member 3 by using the large reduction ratio characteristics of the cycloid reduction mechanism 22. The cycloid reduction mechanism 22 can meet the large reduction ratio, and has the characteristics of simple structure, small height and volume specification, so as to meet the demand of large reduction ratio of the transmission assembly 2, and also can reduce the number of transmission gears in the transmission assembly 2 to a certain extent, simplify the overall structure, and reduce the overall height.

[0052] Generally, the automatic door opening and closing device has a mounting base 4, such as a base, an upper cover, etc. The driving member 1, the transmission assembly 2, and the top door member 3 are directly or indirectly mounted on the mounting base 4. Various functional structures are also provided on the mounting base 4 for adapting to the installation of the driving member 1, the transmission assembly 2, and the top door member 3, etc. The output shaft of the motor 11 is connected with the worm 12 and the first gear 21.

[0053] In some embodiments, in order to realize large reduction ratio transmission of the cycloid reduction mechanism 22, the cycloid reduction mechanism 22 adopts the structure form of eccentric driving cycloid disc. Specifically, the cycloid reduction mechanism 22 can include a housing 221, a cycloid disc 222, and an input shaft 223.

[0054] The housing 221 is arranged on the mounting base, and the inside of the housing 221 has a containing space. The cycloid disc 222 is movably arranged in the housing 221, and has a certain gap between the cycloid disc 222 and the inner wall of the housing 221, not a close fit. The cycloid disc 222 is power coupled with the second gear 23 as the power output end of the cycloid reduction mechanism 2. The input shaft 223 is the power input end of the cycloid reduction mechanism 2, one end of the input shaft 223 is connected with the first gear 21, the other end is rotationally matched with the cycloid disc 222, and the input shaft 223 and the cycloid disc 222 are eccentrically arranged, so that the cycloid disc 222 can move in the housing 221 under the drive of the first gear 21, and drive the second gear 23 to rotate, realizing the transmission of driving torque.

[0055] The inner wall of the shell 221 is provided with a first annular tooth 221a, and the outer circumferential surface of the cycloid disc 222 is provided with a second annular tooth 222a, part of the second annular tooth 222a is engaged with the first annular tooth 221a. Under the combined action of the driving force of the input shaft 223 and the meshing force of the first annular tooth 221a, the cycloid disc 222 will roll along the first annular tooth 221a. When the first gear 21 and the input shaft 223 rotate one circle, the cycloid disc 222 moves one tooth along the second annular tooth 222a, thereby achieving a large reduction in speed; and the second gear 23 is driven by the cycloid disc 222 at a low speed.

[0056] In some embodiments, in order to adapt the shaft fixing rotation mode of the second gear 223 and the eccentric rotation mode of the cycloid disc 222, a cycloid disc hole 222b is formed in the cycloid disc 222 along the thickness direction of the disc, and an output shaft 231 is arranged on the second gear 23 along the axial direction of the rotation shaft of the second gear 23, the output shaft 231 is arranged in the cycloid disc hole 222b, and the outer circumferential surface of the output shaft 231 is in sliding fit with the inner wall surface of the cycloid disc hole 222b. When the input shaft 223 rotates with the first gear 21, the cycloid disc 222 rotates eccentrically, the cycloid disc hole 222b pushes the output shaft 231 to move, thereby driving the second gear 23 to rotate.

[0057] Generally, the output shaft 231 and the cycloid disc hole 222b can be circular holes, and the diameter of the output shaft 231 is smaller than the diameter of the cycloid disc hole 222b, and the difference between the diameters can be designed by adaptability test to reduce the risk of interference and jam caused by the difference in motion forms between the cycloid disc 222 and the second gear 23.

[0058] The output shaft 231 and the cycloid disc hole 222b can be eccentrically arranged, and the eccentric state of the output shaft 231 and the cycloid disc hole 222b is equivalent to the eccentric state of the cycloid disc 222 and the input shaft 223, which can greatly reduce the risk of jamming and interference between the cycloid disc 222 and the second gear 23.

[0059] In some embodiments, in order to balance the stress, the number of output shafts 231 and cycloid disc holes 222b can be set to multiple, avoiding local stress concentration, causing the second gear 23 to tilt, lose position, and other improper attitude changes, to ensure the transmission quality.

[0060] The multiple output shafts 231 can be arranged at equal intervals around the circumferential side of the rotation axis of the second gear 23, so that the second gear 23 is uniformly stressed. Correspondingly, the number of cycloid disc holes 222b is consistent with the number of output shafts 231, and they are one-to-one corresponding.

[0061] In some embodiments, in order to facilitate installation and processing, the cycloid deceleration mechanism 2 can further comprise an output shaft seat 232, a plurality of output shafts 231 are arranged on the output shaft seat 232, and the output shaft seat 232 is connected with the second gear 23. That is, after the plurality of output shafts 231 are connected as a whole through the output shaft seat 232, the whole is then installed on the second gear 23, and the whole is assembled and connected with the cycloid disc 22, thereby greatly simplifying the assembly operation and improving the overall structural strength to some extent.

[0062] In some embodiments, in order to simplify the assembly structure of the first gear 21, the second gear 23 and the output shaft seat 232, the first gear 21, the second gear 23 and the output shaft seat 232 can be arranged coaxially, that is, the rotation of the first gear 21, the second gear 23 and the output shaft seat 232 is realized by using the same rotating shaft; for example, the input shaft 223 is used as the common rotating shaft, one end of the input shaft 223 is fixed on the first gear 21, and the second gear 23 and the output shaft seat 232 are in rotation with the input shaft 223.

[0063] The first gear 21, the second gear 23 and the output shaft seat 232 can also be independently arranged with rotating shafts and independently arranged with assembly structures, which will not be described here.

[0064] Figure 6 The structure diagram of the input shaft in the transmission assembly in Figure 2 is shown.

[0065] Referring to Figure 3 , Figure 4 and Figure 6 , in some embodiments, considering that the motion form of the cycloid disc 222 includes eccentric rotation and rolling along the inner wall of the shell 221, the input shaft 223 and the cycloid disc 222 adopt an eccentric rotation structure. On the cycloid disc 222, an axle hole 222c is formed in the thickness direction, and an eccentric bearing 223a is sleeved on the input shaft 223, and the eccentric bearing 223a is clamped in the axle hole 222c.

[0066] When the input shaft 223 rotates with the first gear 21, the driving eccentric bearing 223a follows the deflection, thereby pushing the cycloid disc 222 to roll along the circumference of the first annular tooth, and through the relative rotation of the inner and outer rings of the eccentric bearing 223a, the rotation of the cycloid disc 222 is absorbed, thereby compatible with the two motion forms of the cycloid disc 222.

[0067] In some embodiments, considering that the cycloid disc 222 and the input shaft 223 are eccentrically matched, the force is uneven, in order to balance the stress of the input shaft 223, the cycloid disc 222 can be provided as two, the two cycloid discs 222 are arranged in the axial direction of the input shaft 223, and the eccentric directions of the two cycloid discs 222 are opposite, thereby making the stress direction of the input shaft 223 in the radial direction approximately symmetrical and the stress size comparable.

[0068] In some embodiments, the force state of the door body during the opening process can be divided into two typical states that occur in sequence, namely, the state of breaking through the larger opening resistance, and the state of overcoming the smaller door rotating resistance. Correspondingly, the automatic door opening mechanism needs a larger force during the process of breaking through the opening resistance, and the door body has a smaller rotating speed; after breaking through the opening resistance, the door body needs a smaller force during the process of rotating the door body, and the door body has a relatively faster rotating speed under the condition of equivalent opening force.

[0069] In order to maintain the stable contact between the automatic door opening device and the door body during the opening and rotating processes of the door, the moving speed of the door top piece 3 should be equivalent to the moving speed of the door body, and the moving speed of the door top piece 2 should have a significant acceleration process during the rotating process of the door. Therefore, the transmission assembly 2 further comprises a first double gear 24 and a second double gear 25, the first double gear 24 and the second double gear 25 are engaged, the first double gear 24 is further engaged with the second gear 23, and the second double gear 25 is engaged with the door top piece 3.

[0070] In order to realize the deceleration driving of the door top piece 3, the first double gear 24 and the second double gear 25 are engaged in the form of non-circular gear, and the speed ratio between the first double gear 24 and the second double gear 25 is ensured to have a decreasing trend during the process of pushing and rotating the door, so that the output rotating speed of the second double gear 25 will increase under the condition that the rotating speed of the second gear 23 is constant.

[0071] Therefore, the first double gear 24 has a first circular tooth part 241 and a first non-circular tooth part 242 arranged coaxially, the first circular tooth part 241 is engaged with the second gear 23, the second double gear 25 has a second circular tooth part 251 and a second non-circular tooth part 252 arranged coaxially, the second circular tooth part 251 is engaged with the door top piece 3, the second non-circular tooth part 252 is engaged with the first non-circular tooth part 251, and the speed ratio between the first non-circular tooth part 242 and the second non-circular tooth part 252 has a decreasing trend during the process of pushing the door body by the door top piece 3.

[0072] In some embodiments, the first circular tooth part 241 and the first non-circular tooth part 242 are arranged in the axial direction of the rotating shaft of the first double gear 24; the second circular tooth part 251 and the second non-circular tooth part 252 are arranged in the axial direction of the rotating shaft of the second double gear 25.

[0073] In some embodiments, the first non-circular tooth part 242 and the second non-circular tooth part 252 are elliptical tooth parts of the same specification; and in order to maintain the stable engagement of the first non-circular tooth part 242 and the second non-circular tooth part 252 and reduce the risk of jamming or engagement failure, the length of the connecting line of the rotating shafts of the first non-circular tooth part 242 and the second non-circular tooth part 252 is the length of the major axis of the elliptical tooth part.

[0074] In some embodiments, in order to adapt to the structural arrangement inside the installation base 4 and take into account the overall small area occupied, it is necessary to switch between various functional components. For example, a first switching gear 26 is arranged between the first gear 21 and the worm 12; and / or a second switching gear 27 is arranged between the second gear 23 and the first double gear 24.

[0075] In some embodiments, the top door piece 3 can be a top rod, and the top rod is movable along its length direction, and the top rod is provided with teeth at intervals along its length direction and is engaged with the second circular tooth portion 251.

[0076] In some embodiments, a refrigerator provided with the automatic door opening device is also provided, which comprises a device body and the automatic door opening device; the device body comprises a cabinet and a door body arranged on the cabinet, and the automatic door opening device is arranged on the cabinet; in the process of the top door piece pushing the door body, the door body is driven to move relative to the cabinet in the opening direction.

[0077] The automatic door opening device and the refrigerator provided by the embodiments of the present application comprise a driving piece, a transmission mechanism, and a top door piece, the driving piece is in transmission connection with the top door piece through a transmission assembly to realize mechanical door opening; the transmission assembly comprises a first gear, a cycloid reduction mechanism, and a second gear which are integrally arranged, the first gear is engaged with the driving piece, the second gear is engaged with the top door piece, and the cycloid reduction mechanism is connected with the first gear and the second gear respectively, and large reduction ratio transmission between the driving piece and the top door piece is realized through the cycloid reduction mechanism, so that the number of gear layers is reduced to a certain extent under the condition of meeting the large reduction ratio, and the complexity and height of the transmission assembly and the automatic door opening device as a whole are reduced.

[0078] In the present application, unless otherwise explicitly specified and limited, "on" or "under" of a first feature to a second feature can include that the first and second features are in direct contact or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, "on", "above" and "above" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. "Below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0079] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0080] It should be noted that all directional indications in the embodiments of the present application are only used to explain the relative position relationship, movement condition and the like between the components in a certain posture, and if the certain posture changes, the directional indications also change accordingly.

[0081] In the present application, unless otherwise explicitly specified and limited, the terms "connection", "fixation" and the like should be understood broadly, for example, "fixation" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through intermediate medium; can be internal connection of two elements or interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0082] In addition, the description such as "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implying the number of the indicated technical features. Therefore, the features limited by "first", "second" can include one or more of the features explicitly or implicitly. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0083] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present specification.

[0084] In addition, the technical solutions among various embodiments can be combined with each other, but it must be based on that a person skilled in the art can realize, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the present application.

[0085] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and deformations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. An automatic door opening device, characterized in that, include: Drive components; The transmission assembly includes a first gear, a cycloidal reduction mechanism, and a second gear. The first gear meshes with the driving component, and the input end and output end of the cycloidal reduction mechanism are respectively connected to the first gear and the second gear. The top door component meshes with the second gear.

2. The automatic door opening device as described in claim 1, characterized in that, The cycloidal deceleration mechanism includes: The outer casing has a first annular tooth on its inner wall; A cycloidal disk is disposed inside the housing. A second annular tooth is provided on the outer peripheral surface of the cycloidal disk. Part of the second annular tooth meshes with the first annular tooth, and the cycloidal disk is dynamically coupled to the second gear, serving as the output end of the cycloidal deceleration mechanism. The input shaft is connected to the first gear at one end and rotates with the cycloidal disk at the other end, and the input shaft is eccentrically positioned with respect to the cycloidal disk.

3. The automatic door opening device as described in claim 2, characterized in that, The cycloidal disk has a cycloidal disk hole along the thickness direction, and the cycloidal deceleration mechanism also includes an output shaft, which is axially arranged on the second gear along the rotation axis of the second gear. The output shaft is disposed in the cycloidal disk hole, and the outer peripheral surface of the output shaft slides in contact with the inner wall surface of the cycloidal disk hole, so that when the input shaft rotates with the first gear, the cycloidal disk rotates eccentrically, causing the cycloidal disk hole to push the output shaft to move, thereby causing the second gear to rotate.

4. The automatic door opening device as described in claim 2, characterized in that, The cycloidal deceleration mechanism further includes an output shaft seat, which is connected between the second gear and the output shaft. There are multiple output shafts, which are equally spaced around the circumferential side of the rotation axis of the second gear.

5. The automatic door opening device as described in claim 4, characterized in that, The first gear, the output shaft seat, and the second gear are coaxially arranged, and the input shaft is rotatably engaged with the second gear and the output shaft seat.

6. The automatic door opening device as described in claim 2, characterized in that, The cycloidal disk has a shaft hole along the thickness direction. The cycloidal deceleration mechanism also includes an eccentric bearing, which is mounted on the input shaft and is embedded in the shaft hole.

7. The automatic door opening device as described in claim 2, characterized in that, There are two cycloidal disks, which are spaced apart along the axial direction of the input shaft and have opposite eccentric directions.

8. The automatic door opening device according to any one of claims 1 to 7, characterized in that, The transmission assembly also includes: The first double gear has a first round tooth portion and a first non-round tooth portion arranged coaxially, and the first round tooth portion meshes with the second gear. The second double gear has a second round tooth portion and a second non-round tooth portion arranged coaxially. The second round tooth portion meshes with the top door component, and the second non-round tooth portion meshes with the first non-round tooth portion. During the process of the top door component pushing the door body, the speed ratio between the first non-round tooth portion and the second non-round tooth portion tends to decrease.

9. The automatic door opening device as described in claim 8, characterized in that, Both the first non-circular tooth portion and the second non-circular tooth portion are elliptical tooth portions of the same specification, and the length of the line connecting the rotation axes of the first non-circular tooth portion and the second non-circular tooth portion is the length of the major axis of the elliptical tooth portion.

10. A refrigerator, characterized in that, include: The equipment body includes a housing and a door, with the door covering the housing; The automatic door opening device as described in any one of claims 1 to 9 is installed in the housing and drives the door to open relative to the housing during the process of the top door member pushing the door.

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