Automatic door opening and closing device and electric appliance using same

Abstract

The invention discloses an automatic door opening and closing device and an electric appliance using the same, and the device comprises a door pushing assembly which comprises a movable push rod suitable for pushing a door body and a door pushing transmission chain used for driving the movable push rod to move; the rotating door assembly comprises an acting piece used for driving the door body to rotate and a rotating door transmission chain used for driving the acting piece to operate. The driving assembly is used for outputting power; the clutch assembly at least comprises a clutch transmission part suitable for being connected with the driving assembly; the clutch transmission part is simultaneously coupled with the door pushing transmission chain and the door rotating transmission chain; the control group is used for adjusting whether the clutch transmission part is connected with the driving assembly or not; when the clutch transmission part is connected with the driving assembly and then moves in the first direction, the door body is suitable for being disengaged from the door frame under the action of the movable push rod and then is driven by the acting part to rotate, and automatic door opening is achieved. When the clutch transmission part and the driving assembly are connected and then operate in the second direction opposite to the first direction, the door body is suitable for being driven by the acting part to rotate so as to achieve automatic door closing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of household appliances, in particular to an automatic door opening and closing device and an appliance using the same. BACKGROUND

[0002] With the development of automatic functions, the opening process of the door body of an appliance such as a refrigerator is changed from a manual mode to an electric mode. In the prior art, a rack capable of linear motion and a motor transmission mechanism for driving the rack are generally used to achieve automatic opening of the door body.

[0003] The door opening device commonly used in the prior art generally pushes the door body to automatically push it open by overcoming the suction force of the door frame. However, the rotation of the door body relative to the door frame after being pushed open is not constrained, and the door body may stop at any position under the inertial action of the rotational motion of the door body, that is, the opening angle of the door body may be small or large. In addition, the speed of pushing open the door body may not be consistent, and the door body cannot be automatically closed after being pushed open. Therefore, the comfort of use is relatively poor. If a power structure for driving the rotation of the door body is additionally configured for the door opening device, the overall automatic door opening and closing device will be complicated, the cost will be high, the probability of use failure will be increased, and the maintenance difficulty will also be increased.

[0004] In summary, in view of the problems existing in the automatic door opening and closing device applied to the appliance in the prior art, the structure of the automatic door opening and closing device needs to be further optimized to improve the comfort of use. SUMMARY

[0005] A first object of the present application is to provide an automatic door opening and closing device to solve the technical problem of optimizing the automatic opening and closing operation of the door body with a simplified structure.

[0006] A second object of the present application is to provide an appliance to solve the technical problem of optimizing the automatic opening and closing operation of the door body in the appliance with a simplified structure.

[0007] The automatic door opening and closing device of the present application is implemented as follows: An automatic door opening and closing device, comprising: a door pushing assembly comprising a movable push rod adapted to push the door body and a door pushing transmission chain for driving the movable push rod to move; a door rotating assembly comprising an acting member for driving the door body to rotate and a door rotating transmission chain for driving the acting member to operate; a driving assembly for outputting power; a clutch assembly comprising at least a clutch transmission member adapted to engage the driving assembly; the clutch transmission member is coupled with the door pushing transmission chain and the door rotating transmission chain simultaneously; a control assembly for regulating the engagement of the clutch transmission with the driving assembly; the control assembly is connected with the clutch transmission; When the clutch transmission is engaged with the driving assembly and runs in a first direction, the door body is adapted to be disengaged from the door frame under the action of the movable push rod and then rotated under the drive of the driving member to realize automatic opening of the door; when the clutch transmission is engaged with the driving assembly and runs in a second direction opposite to the first direction, the door body is adapted to be rotated under the drive of the driving member to realize automatic closing of the door.

[0008] In the optional embodiment of the present application, the clutch transmission adopts a clutch gear; The clutch gear comprises a first gear and a second gear coaxially connected; wherein the first gear is adapted to be engaged with the driving assembly; The clutch assembly further comprises a main transmission gear engaged with the second gear; the main transmission gear is adapted to be coupled with the door opening transmission chain and the door rotating transmission chain simultaneously.

[0009] In the optional embodiment of the present application, the control assembly comprises a clutch push rod adapted to push the clutch gear to make ascending movement, and an elastic member arranged above the clutch gear and adapted to be compressed and deformed with the ascending movement of the clutch gear; When the clutch push rod pushes the clutch gear to make ascending movement, the elastic member is compressed and deformed, and the clutch gear is engaged with the driving assembly to automatically open or close the door body; When the clutch push rod releases the pushing on the clutch gear to make descending reset movement of the clutch gear under the elastic action of the elastic member, the clutch gear is separated from the driving assembly, and the door body is in the state of being closed or opened or being adapted to be manually opened and closed.

[0010] In the optional embodiment of the present application, the control assembly further comprises a clutch bracket for slidingly cooperating with the clutch push rod; the clutch bracket is connected with the clutch transmission; and The clutch bracket is inclinedly matched with the clutch push rod, so that the horizontal linear movement of the clutch bracket drives the ascending and descending movement of the clutch transmission.

[0011] In the optional embodiment of the present application, the clutch bracket is further provided with a supporting framework; The supporting framework and the clutch bracket enclose a cavity for accommodating the clutch transmission; and The side of the supporting framework away from the cavity is further provided with a limiting groove for supporting the elastic member.

[0012] In the optional embodiment of the present application, the clutch push rod is further provided with a power structure for driving the clutch push rod to make horizontal linear movement.

[0013] In the alternative embodiment of the present application, the door pushing transmission chain comprises a first transmission gear set connected with the clutch transmission member, and a first output gear connected with the output end of the first transmission gear set; wherein The first output gear is engaged with the movable pushing rod.

[0014] In the alternative embodiment of the present application, the first output gear comprises a gear part connected with the first transmission gear set, and a dial connected with the gear part for dialing the movable pushing rod.

[0015] In the alternative embodiment of the present application, the movable pushing rod comprises a base adapted to be dialed by the dial, and an extension connected with the base for pushing the door body; The base is further connected with an elastic connecting member.

[0016] In the alternative embodiment of the present application, the movable pushing rod is adapted to swing under the dialing of the dial; and A limiting part is further arranged on both sides of the swinging direction of the base.

[0017] In the alternative embodiment of the present application, the rotating door transmission chain comprises a second transmission gear set connected with the clutch transmission member; The acting member adopts a second output gear connected with the output end of the second transmission gear set; The second output gear is connected with a rotating shaft fixedly connected with the door body; the second output gear has a connecting hole matched with the rotating shaft; When the second output gear rotates forward and reversely, it is adapted to rotate by a certain angle and then drive the rotating shaft to rotate synchronously.

[0018] In the alternative embodiment of the present application, the second output gear is further connected with a synchronous shaft adapted to rotate synchronously with the second output gear; The synchronous shaft is further connected with an angle sensor; When the second output gear rotates, the resistance value in the angle sensor is adapted to change to detect the angle of the door body.

[0019] In the alternative embodiment of the present application, the driving assembly adopts a worm and a motor used in cooperation.

[0020] The electric appliance of the present application is realized as follows: An electric appliance, comprising: the automatic door opening and closing device.

[0021] The automatic door opening and closing device and the electric appliance using the same have the following beneficial effects: the automatic door opening and closing device can not only open the door body relative to the door frame, but also drive the door body to rotate relative to the door frame, so that the opening angle of the door body relative to the door frame can be accurately controlled, and the door body can be separated from the door frame under the action of the door pushing assembly and then rotated under the driving of the door rotating assembly to realize automatic door opening. Thus, the problem of poor use comfort caused by the random and indefinite opening angle of the door body in the prior art is avoided. Furthermore, the driving of the door pushing assembly and the door rotating assembly is realized through one clutch assembly, so that the structure can be simplified, the coordination of the operation process of the door pushing assembly and the door rotating assembly can be improved, the cost can be reduced, and the operation failure rate can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a schematic view of an exploded structure of the automatic door opening and closing device of the present application; Figure 2 is a schematic view of a structure of a shell body of the automatic door opening and closing device of the present application; Figure 3 is a schematic view of a structure of a clutch gear assembly of the automatic door opening and closing device of the present application; Figure 4 is a schematic view of a structure of a support framework of the automatic door opening and closing device of the present application from two different perspectives; Figure 5 is a schematic view of a structure of a clutch support of the automatic door opening and closing device of the present application from two different perspectives; Figure 6 is a schematic view of a structure of a clutch push rod of the automatic door opening and closing device of the present application from two different perspectives; Figure 7 is a schematic view of a structure of a movable push rod of the automatic door opening and closing device of the present application from two different perspectives; Figure 8 is a schematic view of a structure of a second output gear of the automatic door opening and closing device of the present application from two different perspectives; Figure 9 is a schematic view of a structure of a third perspective of the second output gear of the automatic door opening and closing device of the present application; Figure 10 is a schematic view of a structure of a synchronous shaft of the automatic door opening and closing device of the present application from two different perspectives; Figure 11 is a schematic view of a structure of a first output gear of the automatic door opening and closing device of the present application; Figure 12 is a schematic view of an exploded structure of a shell body and a shell cover plate of the automatic door opening and closing device of the present application; Figure 13Internal schematic diagram of the automatic door opening and closing device of the present application when the clutch assembly and the driving assembly are separated; Figure 14 Schematic diagram of the automatic door opening and closing device of the present application when the clutch gear and the worm are separated; Figure 15 Internal schematic diagram of the automatic door opening and closing device of the present application when the clutch assembly and the driving assembly are engaged; Figure 16 Schematic diagram of the automatic door opening and closing device of the present application when the clutch gear and the worm are engaged; Figure 17 Schematic diagram of the structure of the automatic door opening and closing device of the present application applied in a refrigerator; Figure 18 Schematic diagram of the structure of the automatic door opening and closing device of the present application applied in a refrigerator; Figure 19 Schematic diagram of the structure of the automatic door opening and closing device of the present application applied in a refrigerator when the door body is in a closed state; Figure 20 Schematic diagram of the structure of the automatic door opening and closing device of the present application applied in a refrigerator when the door body is in a closed state; Figure 21 Schematic diagram of the structure of the automatic door opening and closing device of the present application applied in a refrigerator when the door body is in a closed state; Figure 22 Schematic diagram of the structure of the automatic door opening and closing device of the present application applied in a refrigerator when the door body is in a closed state; Figure 23 Schematic diagram of the structure of the automatic door opening and closing device of the present application applied in a refrigerator when the door body is in a closed state; Figure 24 Schematic diagram of the structure of the automatic door opening and closing device of the present application applied in a refrigerator when the door body is in a closed state; Figure 25 Schematic diagram of the structure of the automatic door opening and closing device of the present application applied in a refrigerator when the door body is in a closed state; Figure 26 Schematic diagram of the structure of the automatic door opening and closing device of the present application applied in a refrigerator when the door body is in a closed state; Figure 27 Schematic diagram of the structure of the automatic door opening and closing device of the present application applied in a refrigerator when the door body is in a closed state. DETAILED DESCRIPTION

[0023] In order to make the content of the present application more easily and clearly understood, the present application will be further described in detail below according to specific embodiments and in conjunction with the accompanying drawings.

[0024] Example 1: Referring to Figures 1 to 25 As shown in the drawings, the present embodiment provides an automatic door opening and closing device, comprising a shell, and a push door assembly, a rotating door assembly, a clutch assembly and a driving assembly arranged in the shell.

[0025] The shell comprises a shell body 18 and a shell cover plate 4 which are coupled together by fastening screws 1 to form a receiving cavity for accommodating the push door assembly, the rotating door assembly, the clutch assembly and the driving assembly. The driving assembly is used to output power, the push door assembly is used to push the door body to release the fit state of the door body 100 and the door frame 200, and the rotating door assembly is used to drive the door body 100 to rotate relative to the door frame 200, so as to accurately control the opening angle of the door body 100 relative to the door frame 200. The clutch assembly is used to drive the push door assembly and the rotating door assembly to operate under the action of the driving assembly.

[0026] The push door transmission chain and the rotating door transmission chain are respectively located on the two sides of the clutch assembly, so that the clutch assembly can not only drive the push door transmission chain and the rotating door transmission chain to operate at the same time, but also the push door transmission chain and the rotating door transmission chain are reasonably arranged in the shell body 18 and do not interfere with each other, and the push door transmission chain can act on the part of the corresponding door body 100 away from the rotating shaft 300 of the door body 100, so that the longer force arm can be used to overcome the closing force of the door body 100 to open it to a smaller angle relative to the door frame 200, thereby achieving the purpose of saving labor. When the clutch transmission member is engaged with the driving assembly and runs in the first direction (for example, forward rotation), the door body 100 is adapted to be released from the fit with the door frame 200 under the action of the movable push rod 5 and then rotated under the drive of the driving member to realize automatic opening of the door; when the clutch transmission member is engaged with the driving assembly and runs in the second direction opposite to the first direction (for example, reverse rotation), the door body 100 is adapted to be rotated under the drive of the driving member to realize automatic closing of the door.

[0027] Next, in combination with the drawings, the shell body 18 is described in detail first: the inside of the shell body 18 is mainly formed with a first mounting groove 181, a second mounting groove 182, a third mounting groove 183, a first fixed shaft 184, a second fixed shaft 185, a third fixed shaft 186, a fourth fixed shaft 187, a driving output end 188, an ejection output end 189, a fixed column 1810, a limiting column 1811, a bottom rib 1812, a first limiting part 1813 and a second limiting part 1814.

[0028] Further, the clutch assembly comprises at least a clutch transmission member adapted to engage with the driving assembly; the clutch transmission member is coupled with the push door transmission chain and the rotating door transmission chain. That is, in the present embodiment, the clutch transmission member is always coupled with the push door transmission chain and the rotating door transmission chain, but the clutch transmission member and the driving assembly have two states of engagement and separation.

[0029] The adjustment of the engagement or disengagement between the clutch transmission and the driving assembly is realized by the control group. It should be noted that the control group can be connected to the clutch transmission or the driving assembly. In theory, the clutch transmission and the driving assembly can be switched between the engagement and disengagement states, regardless of whether the adjustment is the clutch transmission or the driving assembly. The present embodiment only takes the case that the driving assembly is connected to the clutch transmission as an example for description in combination with the drawings.

[0030] Specifically, in the present embodiment, the clutch transmission is adapted to realize the switching of the engagement or disengagement with the driving assembly through the lifting movement under the action of the driving assembly. It should be noted that the lifting movement in the present embodiment mainly refers to the assembly direction between the shell body 18 and the shell cover plate 4. That is, the upward movement of the clutch transmission is the movement towards the shell cover plate 4, and the downward movement of the clutch transmission is the movement towards the shell body 18.

[0031] For this purpose, in combination with an optional case, the clutch transmission adopts a clutch gear 133. Specifically, the clutch gear 133 includes coaxially connected first and second gears 1331 and 1332. The first gear 1331 is adapted to engage with the driving assembly, and the first gear 1331 can be a helical gear. In an optional implementation, the driving assembly adopts a worm and a motor 16 used in cooperation. The motor 16 is installed in the first mounting groove 181 of the shell body 18 and is fixedly assembled by the shape thereof and the first mounting groove 181. The worm 17 is assembled in interference with the output shaft of the motor 16 to form synchronous rotation. In this structure, in order to facilitate the coupling of the clutch assembly with the push door transmission chain and the rotating door transmission chain, the clutch assembly further includes a main transmission gear 8 engaged with the second gear 1332. The second gear 1332 can be a spur gear. The main transmission gear 8 is adapted to be coupled with the push door transmission chain and the rotating door transmission chain. The main transmission gear 8 is installed at the second fixed shaft 185 and can rotate around the second fixed shaft 185. The large tooth part thereof is engaged with the second gear 1332 of the clutch gear 133.

[0032] The control assembly includes a clutch push rod 14 adapted to push the clutch gear 133 upward, and an elastic element located above the clutch gear 133 and adapted to compress and deform with the upward movement of the clutch gear 133. When the clutch push rod 14 pushes the clutch gear 133 upward, the elastic element is compressed and deformed, and the clutch gear 133 engages with the drive assembly to automatically open or close the door 100. When the clutch push rod 14 releases its push on the clutch gear 133, causing the clutch gear 133 to descend and reset under the elastic action of the elastic element, the clutch gear 133 disengages from the drive assembly, and the door 100 is in a closed, open, or manually operable state. That is, the door 100 may be in a closed state, an open state, a closed state that can be manually opened, or an open state that can be manually closed. The elastic element here can be a tower spring 12.

[0033] The control assembly also includes a clutch bracket 134 for sliding engagement with the clutch push rod 14; the clutch bracket 134 is connected to the clutch gear 133 and is located below the clutch gear 133. The clutch bracket 134 and the clutch push rod are in a bevel engagement, so that the horizontal linear movement of the clutch bracket 134 drives the lifting and lowering movement of the clutch gear 133. The end face of the clutch bracket 123 facing away from the clutch gear 133 is provided with a bevel 1345 for forming a bevel engagement with the clutch push rod 14.

[0034] Based on the above, furthermore, the clutch bracket 134 is also equipped with a support frame 132; the support frame 132 and the clutch bracket 134 enclose a cavity for accommodating the clutch gear 133; and the side of the support frame 132 facing away from the cavity is also provided with a limiting groove 1322 for supporting the elastic element. Here, the clutch bracket 134 and the support frame 132 can be connected by, for example, but not limited to, connecting screws 131.

[0035] The clutch gear 133 is disposed within the cavity formed by the support frame 132 and the clutch bracket 134, and together with the connecting screw 131, they form the clutch bracket assembly 13. The clutch bracket assembly 13 is installed in the third mounting groove 183, and the two sides of the third mounting groove 183 restrict the circumferential degree of freedom of the clutch bracket assembly 13. The central hole of the three components mates with the first fixed shaft 184, and the clutch gear 133 can rotate around the first fixed shaft 184. One end of the tower spring 12 mates with the support frame 132, and the other end mates with the housing cover 4.

[0036] Based on the above structure, in this embodiment, the clutch gear 133, the support frame 132, and the clutch bracket 134 form a clutch bracket assembly 13. The tower spring 12 is located in a limiting groove on the side of the support frame 132 facing away from the cavity. Thus, during the rotation of the clutch gear 133, the axial direction is not subjected to pressure from the tower spring 12. Simultaneously, the clutch bracket 134 cooperates with the clutch push rod 14. By controlling the on / off state of the electromagnet structure 15, the clutch push rod 14 moves back and forth, thereby realizing the up and down movement of the clutch bracket assembly 13, and ultimately achieving the engagement and disengagement of the clutch gear 133 and the worm gear 17. Therefore, during the rotation of the clutch gear 133, it is not subjected to downward elastic pressure from the tower spring 12, thereby reducing end face wear during axial rotation and making the rotation smoother.

[0037] Specifically, referring to the accompanying drawings, the support frame 132 has a central through hole 1321, a limiting groove 1322, a positioning hole 1323, a through hole 1324, and a lower inner end face 1325 that mate with the first fixed shaft 184. The clutch bracket 134 also has a central through hole 1341 mates with the first fixed shaft 184, an upper inner surface 1342, a screw hole 1343, a positioning post 1344, a bottom end face 1346, and a through hole shaft platform 1347. The positioning post 1344 mates with the positioning hole 1323, and the through hole 1324 mates with the screw hole 1343 and is connected by a connecting screw 131. The lower inner end face 1325 and the upper inner surface 1342 respectively mate with the axial end faces of the clutch gear 133.

[0038] The clutch push rod 14 has an inclined push surface 141, an upper end surface 142, a U-shaped groove 143, a retaining groove 144, and a lower end surface 145. The U-shaped groove 143 is used to form a guiding fit between the housing body 18, thereby limiting the movement trajectory of the clutch push rod 14 and preventing unexpected deviations.

[0039] Based on the above structure, it is also necessary to explain that the clutch push rod 14 used in this embodiment is also equipped with a power structure for driving the clutch push rod 14 to perform horizontal linear motion. As an example of an optional implementation, the power structure is an electromagnet structure 15. The electromagnet structure 15 is installed in the second mounting groove 182 of the housing body 18; the clutch push rod 14 is disposed in the third mounting groove 183, and its slot 144 cooperates with the iron core head of the electromagnet structure 15, allowing it to move back and forth in a linear direction synchronously with the iron core.

[0040] Next is the door pushing assembly, which includes a movable push rod 5 adapted to push the door body 100 and a door pushing transmission chain for driving the movable push rod 5. In this embodiment, the door pushing transmission chain includes a first transmission gear set connected to the main transmission gear 8, and a first output gear 7 connected to the output end of the first transmission gear set; wherein the first output gear 7 engages with the movable push rod 5. It should be noted that, alternatively, the first output gear 7 can be directly connected to the main transmission gear 8.

[0041] The first output gear has a central shaft hole 71, an output working surface 72, and a transition surface 73. The first output gear 7 is mounted on the third fixed shaft 186 through the central shaft hole 71 and can rotate around the third fixed shaft 186. Its tooth profile meshes with the main drive gear 8.

[0042] Regarding the movable push rod 5, it has a central hole 51, a support 52, a rear end face 53, an ejector end 54, a lower contact surface 55, a front end face 56, and an action end 57, wherein the lower contact surface 55 is in sliding fit with the shell body 18.

[0043] More specifically, the first output gear 7 includes a gear section 74 connected to the first transmission gear set and a dial 75 connected to the gear section 74 for actuating the movable push rod 5.

[0044] The movable push rod 5 includes a base adapted to be actuated by the dial 75, and an extension bent and connected to the base for pushing the door body; the base is also connected to an elastic connector. The movable push rod 5 is adapted to swing under the actuation of the dial 75; and a limiting part is provided on each side of the swing direction of the base. The elastic connector here can be a tension spring 6, one end of which cooperates with the support post 52 provided on the movable push rod 5, and the other end cooperates with the limiting post 1811 of the housing body 18, so that the movable push rod 5 is always subjected to an inward pulling force.

[0045] The movable push rod 5 is installed at the fixed post 1810 of the housing body 18 and can rotate around the fixed post 1810. The working end 57 on the base of the movable push rod 5 cooperates with the output working surface 72 of the first output gear 7, and the ejector end 54 on the extension of the movable push rod 5 cooperates with the ejector output end 189 of the housing body 18.

[0046] The clutch assembly in this embodiment controls the engagement and disengagement of the clutch gear 133 and the worm gear 17 by switching the electromagnet structure on and off, realizing the free switching between manual and electric operation modes, and improving the intelligence and practicality of the product.

[0047] Next is the revolving door assembly, which includes an actuating element for driving the door body 100 to rotate and a revolving door drive chain for driving the actuating element; the revolving door drive chain includes a second drive gear set connected to the main drive gear 8. The second drive gear set here may consist of only one second drive gear 9, which is mounted on the fourth fixed shaft 187 and can rotate around the fourth fixed shaft 187, and its large teeth mesh with the first gear 1331 of the main drive gear 8.

[0048] It should be noted that the active component in this embodiment is a second output gear 10 connected to the output end of the second transmission gear set; the second output gear 10 is connected to the rotating shaft 300 fixed on the door body 100.

[0049] More specifically, in this embodiment, the second output gear 10 has an upper outer circular surface 101, an upper end surface 102, a toothed portion 103, a lower outer circular surface 104, a lower end surface 105, and a connecting hole 106. The toothed portion 103 meshes with the second transmission gear 9, while the lower end surface 105 forms a sliding fit with the housing body 18. The second output gear 10 is mounted at the drive output end 188 of the housing body 18, and can rotate within the drive port. Its toothed portion meshes with the small teeth of the second transmission gear 9.

[0050] Specifically, when the second output gear 10 rotates forward and reverse, it is adapted to rotate a certain angle before driving the rotating shaft 300 to rotate synchronously. In other words, during the opening and closing of the door 100, the second output gear 10 does not immediately generate a driving force on the door 100 as soon as it begins to rotate. To meet the above usage requirements, an optional implementation is described in detail below with reference to the attached diagram: First, the rotating shaft 300 has a flat shaft structure, specifically, it has a pair of flat end faces arranged opposite each other on the outer side wall of the rotating shaft 300; the second output gear 10 has a connecting hole 108 that mates with the rotating shaft 300, specifically, one end of the rotating shaft 300 is inserted into the connecting hole 108, and the second output gear 10 can drive the rotating shaft 300 to rotate by the cooperation between the hole wall of the connecting hole 108 and the outer side wall of the rotating shaft 300.

[0051] Furthermore, in this embodiment, the inner wall of the connecting hole 108 is formed with two pairs of centrally symmetrical pushing surfaces for pushing the rotating shaft 300. Each pushing surface is a flat surface that abuts against the flat end face on the outer wall of the rotating shaft 300. For these two pairs of pushing surfaces, one pair of pushing surfaces is used to drive the rotating shaft 300 to move the door body 100 to open, forming closing pushing surfaces 10611 and 10612, and the other pair of pushing surfaces is used to drive the rotating shaft 300 to move the door body 100 to close, forming opening pushing surfaces 10621 and 10622. Furthermore, each opening push surface is adjacent to a closing push surface. For a pair of opening push surfaces and a pair of closing push surfaces, referring to the attached diagram, a closing push surface 10611 and an opening push surface 10621 are adjacent and located on one straight end face of the rotating shaft 300, while another closing push surface 10612 and an opening push surface 10622 are adjacent and located on the other straight end face of the rotating shaft 300. An angle θ is formed between the adjacent opening and closing push surfaces at their ends facing away from the rotating shaft 300; here, θ is an obtuse angle.

[0052] like Figure 9 As shown, at this time, there is an angle θ between the closing push surface 10611 and the opening push surface 10621 on the same side of the connecting hole 106 of the second output gear 10. Similarly, there is an angle θ between the other closing push surface 10612 and the other opening push surface 10622. Based on this structure, as... Figure 21 As shown, when the door 100 needs to be opened, both the opening push surface 10621 and the opening push surface 10622 have an included angle α with the straight end face on the outer side wall of the rotating shaft 300. Therefore, when the second output gear 10 starts to rotate, due to the existence of the aforementioned included angle α, the rotating shaft 300 will not immediately rotate with the second output gear 10. Instead, the rotating shaft 300 will only rotate synchronously with the rotation of the second output gear 10 after the second output gear 10 has rotated until both the opening push surface 10621 and the opening push surface 10622 are in contact with the straight end face on the outer side wall of the rotating shaft 300. The closing process of the door 100 follows the same principle as the opening process, and will not be described further in this embodiment.

[0053] Therefore, the design of the included angle θ and the included angle α formed between the hole wall of the connecting hole 106 and the outer wall of the rotating shaft 300 in the above embodiment is to ensure that the movement of the rotating shaft 300 of the door body 100, which cooperates with the second output gear 10, lags behind the movement of the second output gear 10. This results in a certain lag between the process of the rotating shaft 300 driving the door body 100 to rotate and the process of the movable push rod 5 pushing the door body 100 open. In other words, the movable push rod 5 first acts on the door body 100 to separate it from the door frame. Only after the door body 100 and the door frame 200 are separated can the rotating shaft 300 move under the action of the second output gear 10 to drive the door body 100 to rotate relative to the door frame 200. This protects the second output gear 10 and avoids the problem of wear caused by the rotating shaft 300 driving the door body 100 to rotate while the door body 100 and the door frame 200 are still in contact.

[0054] In addition, it is necessary to explain that in this embodiment, a synchronously moving movable push rod 5 and a second output gear 10 are set inside the automatic door opening and closing device. The two are connected by multiple gear structures, and their operation is synchronous, but their interaction with the door body 100 is independent. Using the automatic door opening and closing device of this embodiment, opening the door body 100 is divided into two steps. In the first step, the suction force between the door body 100 and the door frame 200 is overcome. At this time, the movable push rod 5 of the automatic door opening and closing device away from the door body pivot first pushes the door body 100 open by a small angle, so that it separates from the door frame 200, which has the effect of saving effort. In the second step, the second output gear 10 connected to the pivot 300 of the door body 100 drives the door body to rotate to open the door body 100.

[0055] In summary, the automatic door opening and closing device of this embodiment includes the following states during its specific implementation: The first type, Figure 13 and Figure 14 The diagrams show the clutch assembly of the automatic door opening and closing device in a de-energized state, presented from different cross-sectional directions.

[0056] ① In the unpowered state, the iron core of the electromagnet structure 15 is in the initial position under the action of its own spring, and the clutch push rod 14 is connected to the head of the iron core of the electromagnet structure 15 through the slot 144, and can move back and forth with the movement of the iron core. At this time, the clutch push rod 14 is also in the initial position.

[0057] ② The clutch push rod 14 is set in the third mounting groove 183, and its lower end face 145 is in contact with the inner bottom surface of the third mounting groove; the inclined push surface 141 of the clutch push rod 14 is engaged with the inclined surface 1345 of the support frame 14. At this time, there is a gap between the inclined surfaces of the two, indicating that the two are in a separated state.

[0058] ③ The clutch bracket assembly 13 is disposed in the third mounting groove 183. The clutch bracket 134 is blocked by the two sides of the third mounting groove of the shell body 18, and the support frame 132 is blocked by the shell cover plate 4, so it cannot rotate circumferentially. At the same time, the center of the clutch bracket assembly 13 passes through the first fixed shaft 184, so the two can move up and down along the first fixed shaft 184 in the axial direction. The clutch gear 133 is disposed in the middle of the clutch bracket 134 and the support frame 132, so the clutch gear 133 can move up and down synchronously with the clutch bracket 134 and the support frame 132.

[0059] ④ One end of the tower spring 12 contacts the inner surface of the shell cover plate 2, and the other end contacts the limiting groove 1322 of the support frame 132. In this way, under the elastic force of the tower spring 12, the through hole shaft 1347 of the clutch bracket assembly 13 cooperates with the shaft of the first fixed shaft 184 to form a support.

[0060] ⑤ From Figure 14 As shown in the diagram, in the initial position, the clutch gear 133 and the worm gear 17 are in a disengaged state; thus, in the absence of power, the user can easily open and close the door manually. At the same time, although the clutch gear 133 and the worm gear 17 are disengaged, the second gear 1332 of the clutch gear 133 is still engaged with the large tooth of the main drive gear 8. This reduces one engagement step when power is applied, shortens the time, and improves engagement efficiency.

[0061] The second type, Figure 15 and Figure 16 A diagram showing the clutch assembly of the automatic door opening and closing device in the energized state is displayed: ① When energized, the iron core of the electromagnet structure 15 extends towards the clutch push rod 14, causing the clutch push rod 14 to move synchronously. The inclined surface 141 of the clutch push rod 14 contacts the inclined surface 1347 of the clutch bracket 134. Under the thrust of the electromagnet structure 15, the clutch bracket 134, together with the clutch gear 133, moves upward along the first fixed shaft 184 and continuously compresses the tower spring 12 until the iron core extends to its full stroke. At this time, the clutch bracket assembly 13 is lifted to the highest point. The bottom end face 1346 of the clutch bracket 134 cooperates with the upper end face 142 of the clutch push rod 14, so that the clutch bracket assembly 13 will not move downward under the action of the tower spring 12 after being lifted to the highest point.

[0062] ②From Figure 16 As shown in the diagram, in this position, the clutch gear 133 and the worm gear 17 are engaged. When the output shaft of the motor 16 rotates, the worm gear 17 can drive the clutch gear 133 to rotate, thereby driving other gears to operate and realizing the electric opening and closing of the door.

[0063] In summary, for the automatic door opening and closing device of this embodiment, the driving of both the push door assembly and the turn door assembly is achieved through a single clutch assembly. This not only simplifies the structure and improves the coordination of the operation of the push door assembly and the turn door assembly, but also reduces costs and the failure rate. Furthermore, although the push door assembly and the turn door assembly operate synchronously under the action of the clutch assembly, this embodiment designs the turn door assembly so that the rotation of the door body 100 slightly lags behind its movement relative to the door frame 200 as it is pushed open. This opening method not only conforms to the actual door opening state, improving the naturalness and smoothness of the door body 100 opening process, but also protects the internal components of the automatic door opening and closing device, extending their service life. Therefore, the coordinated operation of the clutch assembly, push door assembly, and turn door assembly in this embodiment, while simplifying the structure and reducing operational failures, also ensures a good match between the operation process and the actual door opening action, better simulating the real door opening action and making the automated door opening process smoother and more natural.

[0064] Example 2: Please see Figure 26 and 27 As shown, based on the automatic door opening and closing device of Embodiment 1, the output gear of the automatic door opening and closing device provided in this embodiment is also connected to a synchronous shaft 11 adapted to rotate synchronously with the output gear; the synchronous shaft 11 is also connected to an angle sensor 3; when the second output gear 10 rotates, the resistance value in the angle sensor 3 is adapted to change to detect the angle of rotation of the door.

[0065] Specifically, a D-shaped rotating shaft 111, a circular portion 112, and a sector-shaped portion 113 are formed on the synchronous shaft 11. The synchronous shaft 11 is installed in the space between the second output gear 10 and the housing cover plate 4. Its sector-shaped portion 113 mates with the connecting hole 106 of the second output gear 10 in the same shape. For example, the sector-shaped portion 113 can be inserted into the connecting hole 106, thus ensuring that when the second output gear 10 rotates, it can drive the synchronous shaft 11 to rotate synchronously. Its circular portion 112 mates with the end of the upper outer circular surface 101 of the second output gear 10, and its D-shaped rotating shaft 111 mates with the D-shaped hole of the angle sensor 3.

[0066] Angle sensor 3 is installed on cover plate 4 and fixed to cover plate 4 by fixing screw 2. The D-shaped rotating shaft 111 of synchronous shaft 11 passes through cover plate 4 and engages with the D-shaped opening of angle sensor 3. When the second output gear 10 rotates, it can drive the D-shaped opening of angle sensor 3 to rotate through synchronous shaft 11. In this way, the internal resistance of angle sensor 3 will change, thereby detecting the angle value of the door body relative to the door frame.

[0067] More specifically, in conjunction with the accompanying drawings, the second output gear 10 is installed at the drive end of the housing body 18 and the housing cover plate 4. Its axial direction is restricted by both, and its upper outer circular surface 101 and lower outer circular surface 104 are respectively installed inside the housing body 18 and the housing cover plate 4 in the circumferential direction, so that the second output gear 10 can rotate.

[0068] In summary, by connecting the second output gear 10, the synchronous shaft 11, and the angle sensor 3, when the second output gear 10 rotates, the resistance value inside the angle sensor 3 changes, thereby detecting the rotation angle of the door.

[0069] Example 3: Please see Figures 1 to 17 As shown, based on the automatic door opening and closing device of Embodiment 1 or Embodiment 2, this embodiment provides an electrical appliance, which can be a refrigerator or other electrical appliances with a door that needs to be opened. This embodiment does not make any absolute limitation on this.

[0070] This embodiment uses a double-door refrigerator as an example, where an automatic door opening and closing device is installed on each of the left and right doors. An installation diagram is shown below. Figure 17 As shown. The automatic door opening and closing device is installed at the door frame 200 and connected to the door body 100. The automatic door opening and closing devices on the left and right sides have a symmetrical structure. The following embodiments are based on... Figure 18 The following is an example of how the door on the left side opens and closes: Figure 19 The diagram shows the internal components and positions of the automatic door opening and closing device (hidden cover plate 4) in the closed state of the door, demonstrating the connection and cooperation of the internal components of the automatic door opening and closing device. At this time, the power is off, and the clutch gear 133 and the worm gear 17 are in a disengaged state.

[0071] The movable push rod 5 inside the automatic door opening and closing device cooperates with the part of the door body 100 away from the rotating shaft 300, while its second output gear 10 cooperates with the rotating shaft 300 of the door body 100, and the movable push rod 5 and the second output gear 10 achieve synchronous linkage through the internal gear system.

[0072] Figure 20 The cross-sectional diagram shown illustrates the connection relationship between the movable push rod 5 and the first output gear 7, and between the second output gear 10 and the door's rotating shaft when the door is closed. At this point, at the movable push rod 5, it can be seen that the central hole 51 of the movable push rod 5 is installed at the fixed post 1810 of the shell body 18, and it can rotate around the fixed post 51; one end of the tension spring 6 is connected to the limiting post 1811, and the other end is connected to the support post 52. In this way, under the tension of the tension spring 6, the ejector end 54 of the movable push rod 5 is always subjected to a tension force towards the shell assembly 18; the front end face 56 on the other side of the movable push rod 5 is blocked by the first limiting part 1813. Under the interaction of the tension spring 6 and the first limiting part 1813, the ejector end 54 of the movable push rod 5 stays parallel to the door body 100, with a small gap between them; the action end 57 of the movable push rod 5 is also in contact with the output action surface 72 of the first output gear 7; in order to reduce the friction surface during the rotation of the movable push rod 5, its lower contact surface 55 is in contact with the bottom rib 1812.

[0073] At the second output gear 10, the door 100 is in the closed state. It can be seen that the closing push surfaces 10611 and 10612 of the connecting hole 106 of the second output gear 10 are respectively in contact with the flat openings on both sides of the rotating shaft 300 of the door 100, while the opening push surfaces 10621 and 10622 on both sides are separated from the flat openings on both sides of the rotating shaft 300 of the door 100.

[0074] When it is necessary to open the door electrically: Both the motor 16 and the electromagnet structure 15 are energized. Under the action of the electromagnet structure 15, the clutch gear 133 meshes with the worm gear 17, so that the torque of the motor 16 can be transmitted to the first output gear 7 and the second output gear 10 through multiple meshing gears.

[0075] Figure 22 The state of the movable push rod 5 when it pushes open the door 100 is shown. The distance between the protruding end 54 of the movable push rod 5 and the door pivot is relatively far, that is, the protruding force arm is relatively long. Therefore, the pushing force required to overcome the initial attraction between the door 100 and the door frame 200 is much smaller than that of the second output gear 10 at the pivot 300 of the door 100. At this time, driven by the torque of the motor 16, the output action surface 72 of the first output gear 7 pushes the action end 57 of the movable push rod 5 to rotate around the fixed column 1810 against the tension of the tension spring 6, thereby causing the protruding end 54 to gradually open the door 100 and the door frame 200. Until the rear end face 53 of the movable push rod 5 contacts the second limiting surface 1814 and is limited, the movable push rod 5 moves to its maximum stroke and can no longer push the door 100 out.

[0076] At the same time, the second output gear 10 and the first output gear 7 operate synchronously. (The image shows the second output gear 10 magnified.) Figure 23As shown, when the movable push rod 5 reaches its maximum stroke, the second output gear 10 rotates until the door opening push surfaces 10621 and 10622 on both sides of its inner shaft hole are in contact with the flat surfaces on both sides of the rotating shaft 300 of the door body 100. Then, the second output gear 10 drives the rotating shaft 200 of the door body 100 to rotate in the direction shown by the arrow, thereby opening the door body 100.

[0077] See Figure 24 The diagram shows the door after it has been opened. As the second output gear 10 continues to open the door, the first output gear 7 is also rotating synchronously. Its transition surface 73 slides tangentially with the action end 57 of the movable push rod 5, preventing it from continuing to rotate.

[0078] When it is necessary to close the door electrically: The rotation direction of the second output gear 10 connected to the pivot of the door body is opposite to the rotation direction of the second output gear 10 corresponding to the opening process of the door body 100. At this time, the closing push surfaces 10611 and 10612 in the hole wall of the connecting hole 106 of the second output gear 10 are once again in contact with both sides of the pivot 200 of the door body 100, thereby driving the door body 100 to the closed state.

[0079] When the user manually opens or closes the door: When the electromagnet structure 15 and the motor 16 are not energized, the clutch gear 133 and the worm gear 17 are in a disengaged state, so the user can manually open or close the door 100 normally. In summary, the movable push rod 5, located on the door body 100 away from the pivot 300, can utilize its long lever arm to overcome the closing force of the door body 100 and open it to a smaller angle from the door frame 200, thus saving effort. After the door body 100 separates from the door frame 200, the torque required for rotation is small. Therefore, the drive end uses the second output gear 10, connected to the pivot 200 of the door body 100, to drive the door body to rotate, achieving opening and closing of the door body 100 with relatively low torque. The movable push rod 10 and the second output gear 10 are synchronously linked through their internal gear mechanism, ensuring the reliability of operation at both ends and preventing malfunctions caused by misalignment in their operating logic.

[0080] Therefore, this embodiment, through the cooperation of the clutch assembly, the push door assembly, and the turn door assembly, enables not only the door 100 to open relative to the door frame 200, but also the door 100 to rotate relative to the door frame 200. This allows for precise control of the opening angle of the door 100 relative to the door frame 200, avoiding the problem of poor user comfort caused by the random and uncertain opening angle of the door 100 in the existing door opening devices.

[0081] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above are merely specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

[0082] In the description of this invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing the invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0083] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0084] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. In addition, the terms "first," "second," "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0085] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0086] In this invention, unless otherwise expressly specified and limited, "above or below" a first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. An automatic door opening and closing device, characterized in that, include: A door push assembly, comprising a movable push rod adapted to push the door body and a door drive chain for driving the movement of the movable push rod; A revolving door assembly, comprising an actuating element for driving the door body to rotate and a revolving door drive chain for driving the actuating element to operate; Drive components, which are used to output power; A clutch assembly, comprising at least a clutch drive element adapted to engage a drive assembly; the clutch drive element is coupled to both a push door drive chain and a revolving door drive chain. A control group is used to adjust whether the clutch transmission element is engaged with the drive assembly; the control group is connected to the clutch transmission element. When the clutch transmission component engages with the drive assembly and runs in the first direction, the door body is adapted to release its contact with the door frame under the action of the movable push rod and then rotate under the drive of the actuating component to achieve automatic door opening; when the clutch transmission component engages with the drive assembly and runs in the second direction opposite to the first direction, the door body is adapted to rotate under the drive of the actuating component to achieve automatic door closing.

2. The automatic door opening and closing device according to claim 1, characterized in that, The clutch transmission component uses a clutch gear; The clutch gear includes a first gear and a second gear that are coaxially connected; wherein the first gear is adapted to engage with a drive assembly. The clutch assembly also includes a main drive gear that meshes with the second gear; the main drive gear is adapted to be coupled to both the push door drive chain and the revolving door drive chain simultaneously.

3. The automatic door opening and closing device according to claim 2, characterized in that, The control assembly includes a clutch push rod adapted to push the clutch gear to make it move upward, and an elastic element disposed above the clutch gear and adapted to compress and deform as the clutch gear moves upward. When the clutch push rod pushes the clutch gear to make it rise, the elastic element is compressed and deformed, and the clutch gear engages with the drive assembly to automatically open or close the door. When the clutch push rod releases its push on the clutch gear, causing the clutch gear to descend and reset under the elastic action of the elastic element, the clutch gear separates from the drive assembly, and the door is in a closed, open, or manually operated and closed state.

4. The automatic door opening and closing device according to claim 3, characterized in that, The control assembly further includes a clutch bracket for sliding engagement with the clutch push rod; the clutch bracket is connected to the clutch transmission component; and The clutch bracket and the clutch push rod are fitted at an angle so that the horizontal linear movement of the clutch bracket drives the lifting and lowering movement of the clutch transmission component.

5. The automatic door opening and closing device according to claim 4, characterized in that, The clutch bracket is also equipped with a support frame; The supporting frame and the clutch bracket enclose a cavity for accommodating the clutch transmission components; and The supporting frame is also provided with a limiting groove on the side facing away from the cavity to support the elastic element.

6. The automatic door opening and closing device according to any one of claims 3 to 5, characterized in that, The clutch push rod is also equipped with a power structure for driving the clutch push rod to perform horizontal linear motion.

7. The automatic door opening and closing device according to claim 1, characterized in that, The push-door drive chain includes a first transmission gear set connected to the clutch transmission component, and a first output gear connected to the output end of the first transmission gear set; wherein The first output gear engages with the movable push rod.

8. The automatic door opening and closing device according to claim 7, characterized in that, The first output gear includes a gear section connected to the first transmission gear set and a dial connected to the gear section for actuating the movable push rod.

9. The automatic door opening and closing device according to claim 7 or 8, characterized in that, The movable push rod includes a base adapted to be turned by a dial, and an extension connected to the base for pushing the door body. The substrate is also connected to an elastic connector.

10. The automatic door opening and closing device according to claim 9, characterized in that, The movable push rod is adapted to swing under the actuation of the dial; and A limiting part is also provided on each side of the swing direction of the base.

11. The automatic door opening and closing device according to claim 1, characterized in that, The rotary door drive chain includes a second transmission gear set connected to the clutch drive component; The actuating element is a second output gear connected to the output end of the second transmission gear set; The second output gear is connected to a rotating shaft fixed to the door body; the second output gear has a connecting hole that mates with the rotating shaft; When the second output gear rotates forward and in reverse, it is suitable to rotate a certain angle before driving the shaft to rotate synchronously.

12. The automatic door opening and closing device according to claim 11, characterized in that, The second output gear is also connected to a synchronous shaft adapted to rotate synchronously with the second output gear; The synchronous shaft is also connected to an angle sensor; When the second output gear rotates, the resistance value in the angle sensor changes to detect the angle of rotation of the door.

13. The automatic door opening and closing device according to claim 1, characterized in that, The drive assembly uses a worm gear and a motor that work together.

14. An electrical appliance, characterized in that, include: The automatic door opening and closing device as described in any one of claims 1 to 13.

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