Door opening and closing device and electric appliance using same

Abstract

The utility model relates to a door opening and closing device and an electric appliance using the same, and the door opening and closing 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 revolving door assembly comprises an acting piece used for driving the door body to rotate and a revolving door transmission chain used for driving the acting piece to operate; the driving assembly is used for outputting power; the slipping gear assembly comprises a first gear and a second gear which are coaxially connected; wherein the first gear is connected with the driving assembly, and the second gear is coupled with the door pushing transmission chain and the door rotating transmission chain at the same time; the first gear and the second gear are suitable for transmitting torque to enable the driving assembly to connect the door pushing transmission chain and the door rotating transmission chain; and the first gear and the second gear are also suitable for relatively slipping to disconnect the door pushing transmission chain and the door rotating transmission chain from the driving assembly.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of household appliances, especially to a 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. To this end, the prior art uses a rack capable of linear motion and a motor transmission mechanism for driving the rack to achieve automatic opening of the door body.

[0003] The door opening and closing device applied in the prior art to an appliance usually only automatically pushes the door body to overcome the suction force with the door frame, but the rotation of the pushed door body is not constrained and may stay at any position under the action of inertia, i.e., the opening angle of the door body may be small or large, and the speed of pushing the door body may also be inconsistent, and the door body cannot be automatically closed after being pushed. Therefore, the consistency, uniformity, and intelligence of the door opening and closing device used in the prior art need to be improved.

[0004] For example, the existing patent CN116624057A discloses a device capable of pushing and rotating a door, which is easily damaged when an external force is applied to the door body during the opening or closing process (the rotating door mechanism is usually installed close to the door body rotation shaft for overall aesthetics, so the force arm of the door body is long, and only a small force needs to be applied to the door body during the opening and closing process to generate a large force on the internal structure, causing damage to the internal structure).

[0005] In summary, the automatic door opening and closing device applied in the prior art to an appliance has problems, and its structure needs to be further optimized from the perspective of optimizing the use process. UTILITY MODEL CONTENTS

[0006] The first object of the utility model is to provide a door opening and closing device to solve the technical problem of improving the long-term use structural reliability and stability.

[0007] The second object of the utility model is to provide an appliance to solve the technical problem of optimizing the long-term use performance of the door opening and closing device used.

[0008] The door opening and closing device of the utility model is implemented as follows:

[0009] A door opening and closing device, comprising:

[0010] a door pushing assembly comprising a movable pushing rod adapted to push the door body and a door pushing transmission chain for driving the movable pushing rod to move;

[0011] A swing door assembly includes an action member for driving a door body to swing, and a swing door transmission chain for driving the action member to operate;

[0012] A driving assembly for outputting power;

[0013] A slipping gear assembly including a first gear and a second gear coaxially connected; wherein the first gear is engaged with the driving assembly, and the second gear is coupled with the push door transmission chain and the swing door transmission chain simultaneously;

[0014] The first gear and the second gear are adapted to transmit torque to connect the driving assembly with the push door transmission chain and the swing door transmission chain; and the first gear and the second gear are also adapted to slip relative to each other to disconnect the push door transmission chain and the swing door transmission chain from the driving assembly.

[0015] In the optional implementation of the utility model, the first gear is a large gear, and the second gear is a small gear; wherein

[0016] The large gear is adapted to be engaged with the driving assembly; and the small gear is adapted to be coupled with the push door transmission chain and the swing door transmission chain simultaneously.

[0017] In the optional implementation of the utility model, the slipping gear assembly further includes a resilient sliding block set adapted to cooperate with the small gear in the large gear;

[0018] The resilient sliding block set includes at least one pair of sliding blocks adapted to move along the radial direction of the large gear, and a pair of resilient members adapted to cooperate with the sliding blocks one by one;

[0019] The small gear includes at least a slipping tooth portion for cooperating with the resilient sliding block set; the outer circumferential surface of the slipping tooth portion and the sliding blocks form a slipping structure in conformal cooperation;

[0020] When the sliding blocks are engaged with the slipping tooth portion, the small gear and the large gear maintain the same motion state;

[0021] When the small gear rotates relative to the large gear, the sliding blocks are adapted to slide back and forth along the radial direction of the large gear to slip with the slipping tooth portion.

[0022] In the optional implementation of the utility model, the slipping structure is a plurality of grooves distributed in the circumferential direction on the outer circumferential surface of the slipping tooth portion, a ridge shaped between every adjacent two grooves, and a protruding portion adapted to be embedded into any groove on each sliding block.

[0023] In the optional implementation of the utility model, the large gear includes a gear disc, and at least one pair of movable slots for assembling the slipping tooth portion and accommodating the sliding blocks one by one in the gear disc and distributed concentrically with the gear disc; and

[0024] Each active slot is located on the circumferential side of the mounting hole and communicates with the mounting hole;

[0025] The outer end surface of each of the plurality of ridges away from the axis of the slipping tooth part is in contact with the inner wall of the mounting hole.

[0026] In the optional implementation of the utility model, the pinion further comprises a transmission tooth part coaxially connected with the slipping tooth part;

[0027] The transmission tooth part is adapted to be coupled with the door pushing transmission chain and the door rotating transmission chain simultaneously.

[0028] In the optional implementation of the utility model, the door pushing transmission chain comprises at least one door pushing transmission gear connecting the pinion and the movable pushing rod; wherein

[0029] The door pushing transmission gear directly acting on the movable pushing rod is provided with a pushing member synchronously operating with the door pushing transmission gear;

[0030] The pushing member is adapted to push the movable pushing rod to make the movable pushing rod move linearly; and

[0031] The movable pushing rod is further connected with a second spring adapted to be elastically deformed along with the linear movement of the movable pushing rod.

[0032] In the optional implementation of the utility model, the door rotating transmission chain comprises at least one door rotating transmission gear connecting the pinion and an acting member.

[0033] In the optional implementation of the utility model, the acting member adopts a driving wheel; and

[0034] The door rotating transmission chain comprises one door rotating transmission gear connected with the pinion, and a transmission belt or a transmission chain connecting the door rotating transmission gear and the driving wheel.

[0035] In the optional implementation of the utility model, the driving assembly comprises a driver and a clutch assembly matched with the driver;

[0036] The clutch assembly comprises a clutch gear set matched with the large gear and a control set connecting the clutch gear set; wherein

[0037] The clutch gear set comprises an upper gear and a lower gear coaxially connected, and an elastic member arranged between the upper gear and the lower gear; wherein the upper gear is adapted to be engaged with the large gear, and the lower gear is adapted to be engaged with the driver.

[0038] In the optional implementation of the utility model, the control set comprises a clutch bracket connected with the lower gear, and a clutch pushing rod in sliding cooperation with the clutch bracket;

[0039] The clutch bracket is in bevel cooperation with the clutch push rod, so that the horizontal linear motion of the clutch push rod drives the clutch bracket to drive the lower gear to make lifting motion.

[0040] When the clutch push rod pushes the clutch bracket to drive the lower gear to make lifting motion, the elastic member is deformed under pressure, and the upper gear is engaged with the lower gear to automatically open or close the door body.

[0041] When the clutch push rod releases the pushing of the clutch bracket, the lower gear makes descending reset motion under the elastic action of the elastic member, the lower gear is separated from the upper gear, and the door body is in a closed or opened state or is suitable for being manually opened and closed.

[0042] In the optional implementation of the utility model, at least one anti-rotation structure in concave-convex cooperation is arranged between the upper gear and the lower gear.

[0043] In the optional implementation of the utility model, the clutch push rod is further connected with a power structure for driving the clutch push rod to make horizontal linear motion.

[0044] In the optional implementation of the utility model, the acting member is further connected with an angle sensor.

[0045] When the acting member rotates, the resistance value in the angle sensor is suitable to change to detect the angle of the door body rotation.

[0046] The electric appliance of the utility model is realized as follows:

[0047] An electric appliance comprises the switch door device.

[0048] By adopting the above technical scheme, the switch door device and the electric appliance using the same have the following beneficial effects: the switch door device and the electric appliance using the same of the utility model can not only realize the opening of 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, 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. During the opening or closing of the door body, when the door body is subjected to a large external force, the relative slipping between the first gear and the second gear in the slipping gear assembly can be used to avoid the damage of the door rotating transmission chain and the driving assembly in the switch door device. BRIEF DESCRIPTION OF DRAWINGS

[0049] Figure 1 is the structure schematic view of the slipping gear assembly of the utility model in the non-slip state;

[0050] Figure 2 is the sectional structure schematic view of the slipping gear assembly of the utility model.

[0051] Figure 3 is the first perspective view and the second perspective view of the large gear of the slipping gear assembly of the utility model;

[0052] Figure 4 is the structure schematic view of the slipping gear assembly in the slipping state of the utility model;

[0053] Figure 5 is the first perspective view of the pinion of the slipping gear assembly of the utility model;

[0054] Figure 6 is the second perspective view of the pinion of the slipping gear assembly of the utility model;

[0055] Figure 7 is the first perspective view and the second perspective view of the sliding block of the slipping gear assembly of the utility model;

[0056] Figure 8 is the explosion structure schematic view of the door opening and closing device of the utility model;

[0057] Figure 9 is the partial exploded structure schematic view of the door opening and closing device of the utility model;

[0058] Figure 10 is the structure schematic view of the shell body of the door opening and closing device of the utility model;

[0059] Figure 11 is the structure schematic view of the clutch gear set of the door opening and closing device of the utility model;

[0060] Figure 12 is the structure schematic view of the clutch gear set in two different states of the door opening and closing device of the utility model;

[0061] Figure 13 is the structure schematic view of the upper gear of the clutch gear set of the door opening and closing device of the utility model;

[0062] Figure 14 is the first perspective view and the second perspective view of the lower gear of the clutch gear set of the door opening and closing device of the utility model;

[0063] Figure 15 is the first perspective view and the second perspective view of the clutch support of the door opening and closing device of the utility model;

[0064] Figure 16 is the structure schematic view of the clutch push rod of the door opening and closing device of the utility model;

[0065] Figure 17is the structural schematic view of the movable push rod and the pushing piece of the switch door device in the first cooperation state;

[0066] Figure 18 is the structural schematic view of the movable push rod and the pushing piece of the switch door device in the second cooperation state;

[0067] Figure 19 is the cooperation structural schematic view of the movable push rod and the shell body of the switch door device;

[0068] Figure 20 is the structural schematic view of the angle sensor and the acting piece of the switch door device in the cooperation state;

[0069] Figure 21 is the first visual angle structural schematic view of the upper gear and the lower gear of the switch door device in the disengagement state;

[0070] Figure 22 is the second visual angle structural schematic view of the upper gear and the lower gear of the switch door device in the disengagement state;

[0071] Figure 23 is the first visual angle structural schematic view of the upper gear and the lower gear of the switch door device in the engagement state;

[0072] Figure 24 is the second visual angle structural schematic view of the upper gear and the lower gear of the switch door device in the engagement state;

[0073] Figures 1 to 25 is the structural schematic view of the switch door device applied to the double-open-door refrigerator. DETAILED DESCRIPTION

[0074] In order to make the content of the utility model more easily and clearly understood, the utility model is further explained in detail below according to specific embodiments and in conjunction with the drawings.

[0075] Embodiment 1

[0076] Please refer to Figure 1 As shown in the figure, the embodiment provides a switch door device, which comprises a shell, a door pushing assembly, a door rotating assembly, a driving assembly and a slipping gear assembly arranged in the shell. The shell comprises a shell body 19 and a shell cover plate 3 connected by fastening screws 2 for cooperation. The door pushing assembly, the door rotating assembly, the driving assembly and the slipping gear assembly are mainly arranged in the assembly cavity of the shell body 19. The slipping gear assembly 4 is installed at the third fixed shaft 198 of the shell body 19 and can rotate around the third fixed shaft 198.

[0077] Specifically, the slip gear assembly adopted in the embodiment comprises a first gear and a second gear coaxially connected, and a resilient slider group arranged between the first gear and the second gear. The resilient slider group comprises at least one pair of sliders 45 adapted to move along the radial direction of the first gear and the second gear, and a pair of elastic members used in one-to-one correspondence with the pair of sliders 45. The elastic members can be selected from, but are not limited to, springs 44. Based on the structure, when the first gear and the second gear maintain the same motion state to transmit torque, the sliders 45 are stationary relative to the first gear and the second gear; when the first gear and the second gear slip relative to each other, the sliders 45 slide back and forth along the radial direction of the first gear and the second gear.

[0078] Specifically, when the first gear and the second gear slip relative to each other, the first gear can be stationary and the second gear rotates, in which case the sliders 45 of the resilient slider group slip and rub against the second gear; or the second gear can be stationary and the first gear rotates, in which case the sliders 45 of the resilient slider group slip and rub against the first gear.

[0079] Based on the above structure, the embodiment in combination with the drawings details a specific optional implementation: the first gear is a large gear 41, the second gear is a small gear 42, and the resilient slider group is arranged in the large gear 41. The outer diameter of the large gear 41 is greater than the outer diameter of the small gear 42, so that the small gear 42 can be at least partially assembled into the large gear 41.

[0080] The resilient slider group comprises at least one pair of sliders 45 adapted to move along the radial direction of the large gear 41, and a pair of elastic bodies used in one-to-one correspondence with the sliders 45. The elastic bodies can be selected from, but are not limited to, springs 44.

[0081] Specifically, first, the large gear 41 comprises a gear disc 411, mounting holes 412 arranged in the gear disc 411 and distributed concentrically with the gear disc 411 for assembling the small gear 42, and at least one pair of movable grooves 416 for one-to-one accommodating the sliders 45. Each movable groove 416 is located on the circumferential side of the mounting hole 412 and communicates with the mounting hole 412. The mounting hole 412 adopts a circular through hole to meet the use requirement of assembling the small gear 42.

[0082] On the basis of the above structure, a receiving hole 453 is arranged inside the sliding block 45, and the spring 44 is partially inserted into the receiving hole 453. The end of the spring 44 outside the receiving hole 453 is in abutting engagement with the wall of the active slot 416 away from the slipping tooth portion 4022. When the sliding block 45 moves away from the slipping tooth portion 4022 of the pinion 42, the spring 44 is compressed and deformed. Under the restoring force of the spring 44, the sliding block 45 can move to the side of the slipping tooth portion 4022 of the pinion 42. In addition, the sliding block 45 is in engagement with the guide rail 414 in the active slot 416 through the guide slot 452 arranged on the sliding block 45, so as to improve the accuracy of the linear motion track of the sliding block 45.

[0083] Next, the pinion 42 will be described. The pinion 42 comprises at least a slipping tooth portion 4022 for engaging the elastic sliding block group. The outer circumferential surface of the slipping tooth portion 4022 and the sliding block 45 form a conforming slipping structure. Based on this structure, when the sliding block 45 is stationary relative to the pinion 42, the pinion 42 and the gear wheel 41 maintain the same motion state (in this embodiment, the same motion state can be that both are stationary or that both rotate synchronously). When the pinion 42 rotates relative to the gear wheel 41, the sliding block 45 is adapted to slide back and forth along the radial direction of the gear wheel 41 to slip with the slipping tooth portion 4022.

[0084] In this embodiment, two pairs of sliding blocks 45 are arranged, and the corresponding active slots 416 are also two pairs, i.e., four active slots 416 correspond to four sliding blocks 45. Preferably, the two pairs of sliding blocks 45 are orthogonally distributed, so that the sliding blocks 45 in the four active slots 416 and the slipping tooth portion 4022 in the mounting hole 412 form a relatively balanced engagement relationship.

[0085] Based on this, it should be noted that the outer circumferential surface of the slipping tooth portion 4022 and the sliding block 45 form a conforming slipping structure. In one specific optional implementation, the slipping structure comprises a plurality of grooves 423 distributed in the circumferential direction on the outer circumferential surface of the slipping tooth portion 4022, a ridge 424 formed between each adjacent two grooves 423, and a protrusion 451 arranged on each sliding block 45 and adapted to be embedded in any groove 423.

[0086] It should be noted that in this embodiment, the outer end surface of each ridge 424 away from the axis of the slipping tooth portion 4022 is a circular arc surface, and the outer end surfaces of the plurality of ridges 424 away from the axis of the slipping tooth portion 4022 form a same circumferential surface. This structure ensures that the outer end surfaces of the plurality of ridges 424 away from the axis of the slipping tooth portion 4022 are in contact with the inner wall of the mounting hole 412, thereby ensuring the reliability and stability of the rotation of the pinion 42 relative to the gear wheel 41.

[0087] Furthermore, the wall surface of the optional protrusion 451 of the present embodiment in contact with the groove 423 is a circular arc surface, that is, a circular arc surface is formed on the groove 423 and the protrusion 451 respectively. The radius of each groove 423 is greater than the radius of any one ridge 424. Under this structure, when the pinion 42 rotates relative to the gear wheel 41, friction will be formed between the ridge 424 and the protrusion 452, and the matching mode of the circular arc surface can reduce the friction.

[0088] On the basis of the above structure, in order to better realize the transmission function of the pinion 42, in combination with the drawings, an optional case is exemplified, the pinion 42 of the present embodiment further comprises a transmission tooth part 4021 coaxially connected with the slip tooth part 4022. Only the slip tooth part 4022 is installed into the mounting hole 412, and the transmission tooth part 4021 will not enter the mounting hole 412. The transmission tooth part 4021 can be understood as a gear structure with teeth. Since it does not need to be assembled into the mounting hole 412, in theory, the outer diameter of the transmission tooth part 4021 can be greater than that of the slip tooth part 4022. At this time, the transmission tooth part 4021 is greater than the gear wheel 41 in principle. Of course, the outer diameter of the transmission tooth part 4021 here can also be the same as that of the slip gear part 422, or the outer diameter of the transmission tooth part 4021 is smaller than that of the slip gear part 422. The present embodiment does not make absolute limitation.

[0089] Regarding the cooperation of the pinion 42 and the gear wheel 41 of the present embodiment, since the pinion 42 needs to rotate in a slip manner relative to the gear wheel 41, the cooperation mode between the pinion 42 and the gear wheel 41 needs to meet the above requirement. In combination with the drawings, an optional case is exemplified as follows:

[0090] Generally, the transmission tooth part 4021 is adapted to be limited to one axial end of the gear disc 411 towards the end surface between the slip tooth part 4022; and the end surface of the slip tooth part 4022 away from the transmission tooth part 4021 is detachably connected with a limiting plate 43 adapted to be limited to the other axial end of the gear disc 411.

[0091] More specifically, the limiting plate 43 can be circular or other shapes, the embodiment with a circular limiting plate 43 as an example, the outer diameter of the limiting plate 43 is greater than the outer diameter of the mounting hole 412, the limiting plate 43 and the slip tooth portion 4022 can be, for example, but not limited to, a screw 46 fastening cooperation, when the limiting plate 43 and the slip tooth portion 4022 are assembled in place, the end surface of the limiting plate 43 towards the slip tooth portion 4022 is in contact with one axial end of the gear wheel 41. As for the other axial end of the gear wheel 41, at this time when the outer diameter of the transmission tooth portion 4021 is greater than the slip tooth portion 4022, the end surface of the transmission tooth portion 4021 towards the slip tooth portion 4022 can be directly used to contact and cooperate with the gear wheel 41 to form a reliable cooperation between the pinion 42 and the gear wheel 41. Of course, a circular partition plate 422 can also be provided between the slip tooth portion 4022 and the transmission tooth portion 4021, at this time the outer diameter of the transmission tooth portion 4021 and the slip tooth portion 4022 can be designed according to actual needs, here is not limited, as long as the outer diameter of the partition plate 422 is greater than the outer diameter of the mounting hole 412, the partition plate 422 and the axial end of the gear wheel 41 can be used to form the reliability of the pinion 42 and the gear wheel 41 in the cooperation state.

[0092] Based on the above structure, for the overall assembly process of the pinion 42 and the gear wheel 41, the slip tooth portion 4022 of the pinion 42 is assembled into the mounting hole 412 of the gear wheel 41, and then the limiting plate 43 and the slip tooth portion 4022 are fastened and cooperated by, for example, a screw 46. When the pinion 42 and the gear wheel 41 need to be disassembled, the limiting plate 43 and the slip tooth portion 4022 can be disassembled. Therefore, the overall assembly and disassembly process is extremely convenient.

[0093] Regarding the slip gear assembly used in the embodiment, the specific implementation principle is as follows:

[0094] Figure 2 And Figure 1 The slip gear assembly is shown in the normal (not slipping) state:

[0095] ①As Figure 2 And Figure 4 The assembly relationship, the partition plate 422 of the pinion 42 is in contact and cooperation with the lower end surface 415 of the gear wheel 41, and the limiting plate 43 and the slip tooth portion 425 of the pinion 42 form cooperation and are fastened and connected by the connecting screw 46. The upper end is limited by the cooperation between the limiting plate 43 and the upper end surface 413 of the gear wheel 41, and the lower end is limited by the cooperation between the partition plate 422 of the pinion 42 and the lower end surface 415, so that the gear wheel 41 and the pinion 42 are connected and cooperated in the axial direction.

[0096] ②In the circumferential direction, the convex ridge 424 of the small gear 42 is uniformly distributed in the circumferential direction and is in contact with the mounting hole 412 of the large gear 41, so that the small gear 42 can rotate relative to the large gear 41.

[0097] ③Under the elastic force of the spring 44, the convex part 451 of the sliding block 45 is matched with the groove 423 of the slipping tooth part 4022 of the small gear 42, which blocks the rotation of the small gear 42, so that the large gear 41 and the small gear 42 form a relatively static combination state at this time; the equal distribution of each part ensures the balance of force.

[0098] Figure 18 The figure shows the working (slipping) state of the slipping gear assembly:

[0099] When subjected to a larger external force, the small gear 42 rotates relative to the large gear 41 under the action of force. During the rotation process, the groove 423 of the small gear 42 and the convex part 451 of the sliding block 45 gradually separate from the engagement state, and at the same time, the spring 44 is continuously compressed. Until the convex part 451 contacts the convex ridge 424, then the convex ridge 424 passes over the convex part 451, so that the convex part 451 cooperates with the next groove 423. If the external force continues to be applied, the large gear 41 and the small gear 42 will continue to slip.

[0100] For the slipping gear assembly of the present embodiment, the slipping of the small gear 42 relative to the large gear 41 is realized by the cooperation of the elastic sliding block group and the small gear 42, and the back and forth movement of the sliding block 45 along the radial direction of the large gear 41. This process is not easy to cause deformation and wear of the sliding block 45 itself, so it can reduce the probability of affecting the service life due to damage of the sliding block 45.

[0101] Next to be explained is the door pushing assembly, which includes a movable push rod 7 suitable for pushing the door body 200 and a door pushing transmission chain for driving the movable push rod 7 to move; the door turning assembly includes an acting member for driving the door body 200 to rotate and a door turning transmission chain for driving the acting member to run; the driving assembly is used for outputting power; the large gear 41 of the slipping gear assembly 4 is suitable for being engaged with the driving assembly; and the transmission tooth part 4021 of the slipping gear assembly 4 is also suitable for being coupled with the door pushing transmission chain and the door turning transmission chain at the same time. The door pushing transmission chain and the door turning transmission chain are located on both sides of the slipping gear assembly 4, and are matched with the small gear 42, so that when the slipping gear assembly 4 rotates, the door pushing transmission chain and the door turning transmission chain on both sides can run synchronously. The movable push rod 7 is installed at the ejection end 1910 of the shell body 19.

[0102] More specifically, the door pushing transmission chain comprises at least one door pushing transmission gear connecting the pinion 42 and the movable push rod 7; wherein the door pushing transmission gear 6 directly acting on the movable push rod 7 is provided with a pushing member 61 synchronously operating with the door pushing transmission gear 6. The present embodiment takes the case of using only one door pushing transmission gear 6 as an example. The pushing member 61 is adapted to push the movable push rod 7 to make the movable push rod 7 move linearly. The pushing member 61 can be selected to have a structure such as but not limited to a sector shape, which is convenient for synchronous rotation with the door pushing transmission gear 6, so that the pushing member 61 can realize the pushing effect on the movable push rod 7 in the process of rotation. The door pushing transmission gear 6 is installed at the fourth fixed shaft 199 of the shell body 19 and can rotate around the fourth fixed shaft 199.

[0103] On the basis of the above structure, in order to limit the movement direction of the movable push rod 7 and make the movement trajectory reliable in the process of pushing the door, one positioning block 1913 is arranged on each side of the movable push rod 7 along the movement direction of the movable push rod 7 in the shell body 19. In addition, the guide groove 74 of the movable push rod 7 cooperates with the guide rib 1912 of the shell body 19, so that the movable push rod 7 can move forward and backward along the guide rib 1912.

[0104] Accordingly, considering the convenience of resetting the movable push rod 7 after losing the pushing effect of the pushing member 61, the movable push rod 7 of the present embodiment is further provided with a second spring 8 adapted to stretch and deform with the linear movement of the movable push rod 7. In this regard, the movable push rod 7 is provided with a hollow groove 75 extending along the movement trajectory thereof, the shell body 49 is provided with a protruding positioning block 1911 inserted into the hollow groove 75, and the second spring 8 is assembled in the hollow groove 75, with the axial direction of the second spring 8 being arranged along the movement direction of the movable push rod 7, so that one axial end of the second spring 8 abuts against the groove wall of the hollow groove 75, and the other axial end of the second spring 8 abuts against the positioning block 1911 inserted into the hollow groove 75. The movable push rod 7 of the present embodiment is used in correspondence with the door body in the door opening and closing device. When the movable push rod 7 moves to one side of the door body 200, a pushing force can be generated on the door body 200 to push the door body 200 open.

[0105] Taking the case of the pushing member 61 having a sector shape structure as an example, in detail:

[0106] When the pushing member 61 is driven by the door pushing transmission gear 6 to rotate along the direction indicated by the arrow of Figure 21 , the acting end 62 of the pushing member 61 exerts a force on the stressed end 73 of the movable push rod 7 to push the movable push rod 7 to move to one side of the door body 200, overcoming the elastic force of the reset second spring 8 in the process of movement, until the movable push rod 7 cannot be pushed any more, at which time the transition surface 63 of the pushing member 61 continuously contacts the stressed end 73. In the subsequent process of continuously opening the door body 200, the door body is mainly driven to open by the door rotating transmission chain, and the movable push rod 7 continuously remains in the pushed-out state.

[0107] Secondly, the rotating door transmission chain includes at least one rotating door transmission gear 5 connecting the pinion 42 and the acting member. Here, the acting member can adopt a gear member capable of driving the rotating shaft of the door body 200 to rotate. The pinion 42 is connected to the gear member through a rotating door transmission gear 5, so that the rotation of the pinion 42 can drive the gear member to rotate, thereby driving the door body 200 to rotate relative to the door frame 100 to open the door body 200.

[0108] In this embodiment, an example is given in combination with the drawings. The acting member adopts a driving wheel 10. The rotating door transmission chain includes a rotating door transmission gear 5 connected to the pinion 42, and a transmission belt 12 or a transmission chain connecting the rotating door transmission gear 5 and the driving wheel 10. Here, in order to ensure smooth operation of the transmission belt 12 or the transmission chain, a tensioning wheel 11 is also arranged in the shell body 19 to cooperate with the transmission belt 13 or the transmission chain. The rotating door transmission gear 5 is installed at the second fixed shaft 197 of the shell body 19 and can rotate around the second fixed shaft 197. The driving wheel 10 is installed at the driving end 195 of the shell body 19 and is connected to the rotating door transmission gear 5 through the transmission belt 12. At the same time, the tensioning wheel 11 is installed at the first fixed shaft 196 and is in contact with the transmission belt 12 to ensure that the transmission belt 12 has sufficient tensioning force, thereby ensuring normal transmission.

[0109] Next, the driving assembly adopted in this embodiment includes a driver and a clutch assembly cooperating with the driver. The driver here adopts, for example but not limited to, a speed reducer motor set 18, which can cooperate with the clutch assembly through a transition gear 181. The speed reducer motor set 18 is installed in the first mounting groove 191 of the shell body 19.

[0110] In detail, regarding the clutch assembly adopted in this embodiment, it includes a clutch gear set cooperating with the large gear 41 and a control set connecting the clutch gear set. The clutch gear set includes coaxially connected upper gear 141 and lower gear 143, and elastic member 142 arranged between the upper gear 141 and the lower gear 143. The upper gear 141 is adapted to engage with the large gear 41, and the lower gear 143 is adapted to engage with the driver. The clutch gear set is installed on the fixed column 192 of the shell body 19 and can rotate circumferentially around the fixed column 192 and is limited by the limiting screw 13.

[0111] Here, whether the upper gear 141 and the lower gear 143 are engaged or not is adjusted by the control set. When the elastic member is in a natural elastic state, the upper gear 141 and the lower gear 143 are in a relatively separated state. When the upper gear 141 and the lower gear 143 are in an engaged state, the elastic member 142 is in a compressed deformed state.

[0112] Based on the above situation, combined with the drawings, an optional implementation case is exemplified, the control group includes a clutch bracket 15 connected with the lower gear 143, and a clutch push rod 16 in sliding cooperation with the clutch bracket 15. The clutch bracket 15 is in bevel cooperation with the clutch push rod 16, so that the horizontal linear motion of the clutch push rod 16 drives the clutch bracket 15 to drive the lower gear 143 to make lifting motion. The clutch push rod 16 is pre-provided with a bevel pushing surface 161 to cooperate with the pre-provided bevel end surface 154 of the clutch bracket 15. The clutch bracket 15 is also installed on the fixed column 192 to support the clutch gear group.

[0113] In this case, when the clutch push rod 16 pushes the clutch bracket 15 to drive the lower gear 143 to make lifting motion, the elastic member 142 is deformed under pressure, the upper gear 141 is engaged with the lower gear 143 to automatically open or close the door body; when the clutch push rod 16 releases the pushing of the clutch bracket 15, the lower gear 143 makes descending reset motion under the elastic action of the elastic member 142, the lower gear 143 is separated from the upper gear 141, and the door body 200 is in a closed or open state or is suitable for being manually opened and closed.

[0114] It should be noted that, for the cooperation mode of the upper gear 141 and the lower gear 143 with the elastic member 142, the end surface of the upper gear 141 facing the lower gear is provided with a recessed columnar accommodation cavity 1413, and the end surface of the lower gear 143 facing the upper gear is provided with a recessed columnar accommodation cavity 1433, and the columnar accommodation cavities in the upper gear 141 and the lower gear 143 are coaxially arranged to form a cavity for accommodating the elastic member 142.

[0115] More specifically, at least one convex-concave cooperation rotation stopping structure is provided between the upper gear 141 and the lower gear 143. Here, in order to form a reliable engagement state of the upper gear 141 and the lower gear 143, combined with the drawings, an example is that a key 1434 is arranged on the end surface of the lower gear 143 facing the upper gear, and a corresponding recess hole 1414 is arranged on the end surface of the upper gear 141 facing the lower gear 143, which is suitable for one-to-one insertion of the key 1434.

[0116] In addition, it should be noted that, for the linear motion driving of the clutch push rod 16, the clutch push rod is also connected with a power structure for driving the clutch push rod 16 to make horizontal linear motion. Here, an optional implementation case is exemplified, the power structure adopts an electromagnet structure 17. The electromagnet structure 17 is installed in the shell body 19; the clutch push rod 16 has a clamping groove 164 cooperating with the head of the core of the electromagnet structure 17, and can move forward and backward in the linear direction synchronously with the core. The electromagnet structure 17 is installed in the third installation groove 194 of the shell body 19; the clutch push rod 16 is arranged in the second installation groove 193.

[0117] Finally, in an alternative embodiment of the door opening and closing device, the actuator is further connected with an angle sensor 1. When the actuator rotates, the resistance value in the angle sensor 1 changes to detect the angle of the door body 200. The angle sensor 1 is installed on the cover plate 3, facing the upper end of the actuator. A small magnet 9 is installed on the end surface of the actuator facing the angle sensor 1. The actuator drives the small magnet 9 to rotate synchronously. The angle sensor 1 detects the angle of the actuator according to the change of the magnetic field of the small magnet 9 during rotation. The opening or closing angle of the door body 200 is detected to control the speed of the speed reducer motor set 18, achieving better door opening and closing effect.

[0118] Next, the specific implementation principle of the door opening and closing device is described in detail in combination with the drawings:

[0119] Figure 22 And Figure 21 The schematic diagram of the clutch gear set, driver and electromagnet structure 17 in the unpowered state of the door opening and closing device is shown from different cross-sectional directions:

[0120] ①In the unpowered state, the core of the electromagnet structure 17 is in the initial position under the action of its own spring. The clutch push rod 16 is connected with the head of the core of the electromagnet structure 17 through the clamping groove 164, and can move back and forth with the core. At this time, the clutch push rod 16 is also in the initial position.

[0121] ②The inclined push surface 161 of the clutch push rod 16 cooperates with the inclined end surface 154 of the clutch bracket 15, and at this time, there is a gap between them, indicating that they are in a separated state.

[0122] ③The positioning middle hole 152 of the clutch bracket 15 is installed on the fixed column 192 of the shell body 19, and the periphery cooperates with the periphery side wall of the second installation groove 193 of the shell body 19, so that it cannot rotate in the circumferential direction. The positioning middle hole 152 cooperates with the fixed column 192 to realize up and down displacement under the action of the clutch push rod 16.

[0123] The middle holes of the upper gear 141 and the lower gear 143 of the clutch gear set are matched with the upper and lower outer circular surfaces of the fixed column 192, so that the clutch gear set can rotate around the fixed column 192; the inner hole 1432 of the lower gear 143 is matched with the lower outer circular surface of the fixed shaft 192, and the lower stepped surface 1435 is in contact with and supported by the upper stepped part 151 of the clutch support 15, so that when the clutch support 15 is subjected to the force of the clutch push rod, the lower gear 143 can be lifted upward; the central shaft hole 1411 of the upper gear 141 is matched with the upper outer circular surface of the fixed shaft 192, and the lower end surface 1416 is in contact with and supported by the upper end part 1921 of the lower outer circular surface; the elastic member 142 is located between the upper gear 141 and the lower gear 143, and is subjected to the force of the elastic member, so that the upper gear 141 and the lower gear 143 of the clutch gear set are in a separated state at the initial position; at the same time, the fixed column 192 is matched with the limiting screw 13 at the top, so that the displacement of the clutch gear set is limited and always matched with the fixed column 192.

[0124] The transition gear 181 is partially meshed with the toothed part of the lower gear 143, so that when the upper gear 141 and the lower gear 143 of the clutch gear set are engaged, a quick response can be achieved to drive the entire door pushing assembly and the door rotating assembly to rotate and eliminate the meshing delay.

[0125] From Figure 23 and 22 , it can also be seen that the upper gear 141 is in a separated state with the lower gear 143 under the action of the elastic member 142 at the initial position of the clutch gear set; and the upper gear 141 is in a meshed state with the large gear 41 of the slipping gear assembly, so that when there is no power supply, the upper gear 141 will rotate synchronously when the user manually opens and closes the refrigerator door body, and the lower gear 143 is meshed with the transition gear 181 and will not rotate synchronously.

[0126] Figure 24 and Figure 24 show the diagram of the clutch gear set in the power-on state of the door opening and closing device:

[0127] ①In the power-on state, the core of the electromagnet structure 17 protrudes forward to drive the clutch push rod 16 to move forward synchronously, the inclined pushing surface 161 of the clutch push rod 16 is in contact with the inclined end surface 154 of the clutch support 15, under the action of the pushing force of the electromagnet structure 17, the clutch support 15 drives the lower gear 143 to move upward along the fixed column 192 and continuously compresses the elastic member 142, until the core protrudes to the full stroke, at this time, the clutch support 15 is lifted to the highest position, the bottom surface 153 is matched with the upper contact surface 163 of the clutch push rod 16, so that after the clutch support 15 is lifted to the highest position, it will not move downward under the action of the elastic member 142, so that the upper gear 141 and the lower gear 143 can rotate synchronously during operation.

[0128] When the lower gear 143 is lifted, it is fully engaged with the transition gear 181 at this time; while the upper gear 141 is still in normal engagement with the large gear 41 of the slip gear set.

[0129] The switch door device of the embodiment protects the gear structure by the built-in slip gear assembly when external force affects the normal opening and closing of the door body during the electric opening and closing process; the door pushing transmission chain and the door rotating transmission chain are located on the two sides of the slip gear assembly, and the door pushing transmission chain and the door rotating transmission chain on the two sides are engaged with the transmission gear part of the slip gear set, so that when slipping occurs under the action of external force, the door pushing transmission chain and the door rotating transmission chain on the two sides will not appear the engagement disorder.

[0130] The transition gear 181 and the large gear 41 of the slip gear assembly matched with the deceleration motor assembly are respectively engaged with the lower gear 143 and the upper gear 141 of the clutch gear set. In the unpowered state, the upper gear 141 and the lower gear 143 of the clutch gear set are separated, so that the transition gear 181 is not connected with the slip gear assembly, so that manual opening and closing of the door body can be realized; in the powered state, the upper gear 141 and the lower gear 143 of the clutch gear set can be quickly combined, the transition gear 181 matched with the deceleration motor assembly 18 can drive the clutch gear set to transmit rotation to the slip gear assembly, and then drive the door pushing transmission chain and the door rotating transmission chain on the two sides of the slip gear assembly to rotate, thereby realizing the function of opening and closing the door body.

[0131] Embodiment 2:

[0132] On the basis of the switch door device of embodiment 1, the embodiment provides an electric appliance, which comprises the switch door device of embodiment 1. The electric appliance can be a refrigerator, and can also be other electric appliances with door bodies to be opened, which are not absolutely limited in the embodiment.

[0133] The embodiment takes the case that the switch door device is arranged on a double-door refrigerator as an example, and one switch door device is installed at each of the left and right door bodies of the double-door refrigerator. ​ The switch door device is installed at the door frame 100 and connected with the door body 200. The automatic switch door devices on the left and right sides are symmetrical structures, and the driving wheels 10 are coaxially connected with the rotating shafts of the door bodies 200.

[0134] The above specific embodiments further specifically describe the purpose, technical scheme and beneficial effects of the utility model, and it should be understood that the above are only specific embodiments of the utility model and are not used to limit the utility model, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

[0135] In the description of the utility model, need understanding is, the term indicating the orientation or position relation is based on the orientation or position relation shown in the drawing, is only for the convenience of describing the utility model and simplifying the description, and is not indicating or implying that the indicated device or element must have a specific orientation, is constructed and operated with a specific orientation, therefore can not be understood as the limitation to the utility model.

[0136] In the utility model, unless another explicit provision and limitation, the term "installation", "connection", "connect", "fix" and so on term should do the broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be the communication inside two elements or the interaction relationship of two elements. For the ordinary skilled person in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

Claims

1. A door opening and closing device characterized by comprising: The application relates to a door driving device, comprising: a door pushing assembly comprising a movable pushing rod adapted to push a door body and a door pushing transmission chain for driving the movable pushing 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 move; a driving assembly for outputting power; a slipping gear assembly comprising a first gear and a second gear coaxially connected; wherein the first gear is engaged with the driving assembly and the second gear is coupled with the door pushing transmission chain and the door rotating transmission chain at the same time; the first gear and the second gear are adapted to transmit torque to connect the driving assembly with the door pushing transmission chain and the door rotating transmission chain; and the first gear and the second gear are also adapted to slip relative to each other to disconnect the door pushing transmission chain and the door rotating transmission chain from the driving assembly.

2. The door opening and closing device according to claim 1, characterized by the first gear is a large gear and the second gear is a small gear; wherein the large gear is adapted to be engaged with the driving assembly and the small gear is adapted to be coupled with the door pushing transmission chain and the door rotating transmission chain at the same time.

3. The door opening device according to claim 2, characterized in that the slipping gear assembly further comprises a resilient sliding block set adapted to cooperate with the small gear in the large gear; the resilient sliding block set comprises at least one pair of sliding blocks adapted to move along the radial direction of the large gear and a pair of elastic bodies adapted to cooperate with the sliding blocks; the small gear comprises at least a slipping tooth portion adapted to cooperate with the resilient sliding block set in the large gear; and a conforming slipping structure is formed between the outer surface of the slipping tooth portion and the sliding blocks; when the large gear and the small gear keep the same motion state to transmit torque, the sliding blocks are static relative to the large gear and the small gear; when the small gear slips relative to the large gear, the sliding blocks slide back and forth along the radial direction of the large gear.

4. The door opening device according to claim 3, characterized in that the slipping structure comprises a plurality of grooves distributed along the circumferential direction on the outer surface of the slipping tooth portion, a ridge shaped between every two adjacent grooves, and a protruding portion on each sliding block adapted to be embedded into any groove.

5. The door opening device according to claim 4, characterized in that the large gear comprises a gear disc, at least one pair of movable slots for accommodating the sliding blocks and mounting holes for assembling the slipping tooth portion, which are concentrically distributed in the gear disc; and each movable slot is located on the circumferential side of the mounting hole and communicates with the mounting hole; the outer ends of the plurality of ridges away from the axis of the slipping tooth portion all contact the inner wall of the mounting hole.

6. A door opening device according to any one of claims 2 to 5, characterised in that the small gear further comprises a transmission tooth portion coaxially connected with the slipping tooth portion; the transmission tooth portion is adapted to be coupled with the door pushing transmission chain and the door rotating transmission chain at the same time.

7. The door opening device according to claim 2, wherein the door pushing transmission chain comprises at least one door pushing transmission gear connecting the small gear and the movable pushing rod; wherein a pushing member adapted to move synchronously with the door pushing transmission gear is arranged on the door pushing transmission gear directly acting on the movable pushing rod; the pushing member is adapted to push the movable pushing rod to make the movable pushing rod move linearly; and the movable pushing rod is further connected with a second spring adapted to stretch and deform with the linear motion of the movable pushing rod.

8. The door opening and closing device according to claim 2 or 7, characterized in that the door rotating transmission chain comprises at least one door rotating transmission gear connecting the small gear and the acting member.

9. A door opening device according to claim 8, characterised in that the acting member adopts a driving wheel; and the door rotating transmission chain comprises one door rotating transmission gear connected with the small gear and a transmission belt or a transmission chain connecting the door rotating transmission gear and the driving wheel.

10. The door opening device according to claim 6, wherein The driving assembly comprises a driver and a clutch assembly matched with the driver; The clutch assembly comprises a clutch gear set matched with the gear wheel and a control set connecting the clutch gear set; wherein The clutch gear set comprises an upper gear and a lower gear coaxially connected, and an elastic member arranged between the upper gear and the lower gear; wherein the upper gear is adapted to engage with the gear wheel and the lower gear is adapted to engage with the driver.

11. The door opening device according to claim 10, wherein The control set comprises a clutch bracket connected with the lower gear, and a clutch push rod slidingly matched with the clutch bracket; The clutch bracket is matched with the clutch push rod in a slope manner, so that the horizontal linear motion of the clutch push rod drives the clutch bracket to drive the lower gear to make lifting motion; When the clutch push rod pushes the clutch bracket to drive the lower gear to make lifting motion, the elastic member is deformed under pressure, and the upper gear engages with the lower gear to automatically open or close the door body; When the clutch push rod releases the pushing on the clutch bracket, the lower gear makes descending reset motion under the elastic action of the elastic member, and the lower gear is separated from the upper gear, and the door body is in a closed or opened or suitable for being manually opened and closed state.

12. A door opening device according to claim 10 or 11, characterised in that At least one rotation stopping structure in concave-convex matching is arranged between the upper gear and the lower gear.

13. The door opening device according to claim 11, wherein The clutch push rod is further matched with a power structure for driving the clutch push rod to make horizontal linear motion.

14. The door opening device according to claim 6, wherein The acting member is further connected with an angle sensor; When the acting member rotates, the resistance value in the angle sensor is adapted to change to detect the angle of the door body rotation.

15. An electrical appliance characterized by The switch door device comprises: The switch door device according to any one of claims 1-14.

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