CN109707264B - Clutch automatic door opening device and refrigerator - Google Patents

Abstract

The invention provides a clutch automatic door opening device and a refrigerator. The clutch automatic door opening device includes a base, a driving source, a push rod, and a transmission assembly arranged between the driving source and the push rod. The transmission assembly includes a central shaft fixed on the base, a driving wheel sleeved on the central shaft, a driven wheel and a guide wheel, the guide wheel is formed with a chute, and the driven wheel is formed with internal teeth lock up. The transmission assembly also includes a linkage gear accommodated in the chute and an elastic member acting on the guide wheel. Both sides of the chute are formed with a first meshing rib and a second meshing rib that are adapted to the linkage gear. The meshing ridge moves reciprocatingly along the chute through the linkage gear to realize the change of the matching state between the driving wheel and the driven wheel. The door body of the refrigerator can be easily opened, and the driving wheel is driven to rotate in the reverse direction through the driving source, so that the push rod can be automatically retracted, the structure is reasonable, the work is more reliable, and the user experience is improved.

Description

Clutch automatic door opening device and refrigerator

technical field

The invention relates to the technical field of refrigeration equipment, in particular to a clutch automatic door opening device and a refrigerator.

Background technique

With the improvement of living standards, refrigerators with larger volume are more and more favored and recognized by the market, but such refrigerators with larger volume have larger door weight and greater door seal suction. There is a type of electric door opening device disclosed in the industry, but the torque demand of the motor output is relatively high, the installation position is limited, and the noise is relatively large, which affects the user experience.

The initial stage of the door opening process of the refrigerator needs enough force to overcome the suction force of the door seal, and the subsequent movement process of the door body only needs to overcome the automatic closing locking force and friction force of the hinge. less force. In view of this, a type of automatic door opening device is also disclosed in the industry. After the door body is pushed away from the box body by a push rod, the door is manually opened, but its structure needs further optimization and improvement.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a clutch automatic door opening device and a refrigerator, which can realize the easy opening of the refrigerator door body, have a reliable structure, and improve user experience.

In order to achieve the above purpose of the invention, the present invention provides a clutch automatic door opening device, including a base, a driving source, a push rod and a transmission assembly arranged between the driving source and the push rod, and the push rod is movably installed on the The base, the transmission assembly includes a central shaft fixed on the base, a driving wheel and a driven wheel sleeved on the central shaft, and a guide wheel arranged between the driving wheel and the driven wheel, so The driving wheel is connected to the output end of the driving source, and the driven wheel is used to drive the push rod to move;

The driven wheel is formed with an inner gear which is located on the outer circumference of the guide wheel and is spaced from the guide wheel, a chute is formed on the guide wheel, and the transmission assembly further comprises a The interlocking gear meshing with the inner gear and the elastic piece acting on the guide wheel, the two sides of the chute relative to the circumferential direction of the central axis are respectively formed with first meshing protrusions matching the interlocking gear the rib and the second engaging rib;

The interlocking gear has a disengaged state, a first engagement state and a second engagement state. When the driving wheel opens and rotates in a first direction, the interlocking gear is driven to move along the chute to the first engagement rib. When the driving gear is opened and rotated in the second direction opposite to the first direction, the linkage gear is driven to move along the chute After meshing with the second meshing ridge, the linkage gear is switched to the second engagement state, which drives the driven wheel to rotate in the reverse direction;

When the driving wheel stops rotating, the elastic member drives the guide wheel and the driving wheel to rotate relative to each other, so that the linkage gear is disengaged from the first meshing rib and the second meshing rib, and the linkage gear returns to separation state.

As a further improvement of the present invention, the linkage gear is provided with a fixed shaft fixed to the driving wheel along the axial direction of the central shaft.

As a further improvement of the present invention, the chute has an accommodating portion for accommodating the interlocking gear and a supporting portion located on the side of the accommodating portion away from the driving wheel and used for supporting the fixed shaft. One end of the shaft facing away from the driving wheel protrudes beyond the linkage gear and is located in the support portion.

As a further improvement of the present invention, the support portion is arranged in an arc shape along the central axis.

As a further improvement of the present invention, the first engaging protruding rib and the second engaging protruding rib are formed on opposite sides of the receiving portion, and both the first engaging protruding rib and the second engaging protruding rib are along the central axis. Axial extension setting.

As a further improvement of the present invention, when the interlocking gear moves to engage with the first meshing rib or the second engaging rib, the fixed shaft is just adjacent to the first engaging rib or the second engaging rib with the support portion One side of the engaging ribs abuts against each other.

As a further improvement of the present invention, two sliding grooves are provided and the two sliding grooves are arranged symmetrically with respect to the central axis, and two linkage gears are correspondingly provided and are respectively located in the two sliding grooves.

As a further improvement of the present invention, the driving wheel includes a driving wheel disc and a driving ring gear arranged along the outer circumference of the driving wheel disc and matched with the output end of the driving source, and the driving gear ring forms a receiving cavity , the inner gear is probing and disposed in the receiving cavity.

As a further improvement of the present invention, the transmission assembly further includes a transmission wheel arranged between the push rod and the driven wheel.

The present invention also provides a refrigerator, comprising a box body and a door body disposed on the front side of the box body, the refrigerator further includes the clutch automatic door opening device as described above, and the clutch automatic door opening device is installed on the box body and used to automatically open the door.

The beneficial effects of the present invention are: when the clutch automatic door opening device and the refrigerator are adopted, when the driving wheel is opened and rotated, the linkage gear is firstly driven to move along the chute until it engages with the first meshing ridge or the second meshing ridge. , and then drive the guide wheel and the driven wheel to rotate together; when the driving wheel stops rotating, the elastic member drives the guide wheel and the driving wheel to rotate relative to each other, and the linkage gear returns to the separated state. The clutch automatic door opening device can realize the switching of the cooperation state between the driving wheel and the driven wheel by changing the position of the linkage gear in the chute. The push rod is driven to shrink toward the base, and when the driving wheel stops rotating, the linkage gear can be switched to the separated state in time, which is safer and more reliable in use, prevents accidental impact damage, has a reasonable structure, and improves user experience.

Description of drawings

Fig. 1 is the overall structure schematic diagram of the clutch automatic door opening device of the present invention;

Fig. 2 is the internal assembly structure schematic diagram of the clutch automatic door opening device in Fig. 1;

Fig. 3 is the exploded structure schematic diagram of clutch automatic door opening device in Fig. 1;

Fig. 4 is the partial structure exploded schematic diagram of the transmission assembly of the clutch automatic door opening device of the present invention;

Fig. 5 is the exploded schematic diagram of another angle of the partial structure of the transmission assembly in Fig. 4;

Fig. 6 is the coordination schematic diagram of the disengagement state of the linkage gear and the guide wheel of the transmission assembly in Fig. 4;

FIG. 7 is a schematic diagram of the first engagement state of the linkage gear of the transmission assembly and the guide wheel in FIG. 4;

FIG. 8 is a schematic diagram of the cooperation in the second engagement state of the linkage gear of the transmission assembly and the guide wheel in FIG. 4;

Fig. 9 is the structural representation of the connecting rod of the travel switch of the clutch automatic door opening device of the present invention;

10 is a schematic diagram of the overall structure of the refrigerator of the present invention.

Detailed ways

The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings. However, this embodiment does not limit the present invention, and structural, method, or functional changes made by those skilled in the art according to this embodiment are all included in the protection scope of the present invention.

Referring to FIGS. 1 to 5 , the clutch automatic door opening device 100 provided by the present invention includes a base 1 , a driving source 2 , a push rod 3 , and a transmission assembly 5 disposed between the driving source 2 and the push rod 3 .

The base 1 includes a first shell 11 and a second shell 12 that are fastened to each other. An installation space is formed between the first shell 11 and the second shell 12 . The first shell 11 and The second housing 12 is also provided with a number of screw holes 13 for positioning and installation. The drive source 2 is fixed in the installation space; the push rod 3 is movably installed on the base 1 , and the drive source 2 can drive the push rod 3 to move along its extending direction through the transmission assembly 5 . Here, the driving source 2 is configured as a motor, and the motor includes a motor body 21 , an output shaft 22 protruding outward from the motor body 21 , and a worm 23 connected to the output shaft 22 . The motor body 21 is also provided with a power cord (not shown) connected to an external power source, and the end of the worm 23 away from the motor body 21 is also provided with a support bearing 24 fixed on the base 1 to This makes the worm 23 more stable during the rotation process and reduces the deflection.

The push rod 3 can be retracted from the initial position in the installation space and protrude outward to open the door body, and the user can open the door with less effort. The bidirectional motor rotates in different directions, so that the push rod 3 can be driven to protrude outward from the initial position or retract to the initial position in the installation space. Preferably, a through hole 14 is formed between the first housing 11 and the second housing 12 for the push rod 3 to protrude outward, and the protruding end of the push rod 3 at the initial position is connected to the The openings of the through holes 14 are flush with each other.

The transmission assembly 5 includes a central shaft 51 fixed on the base 1, a driving wheel 52 sleeved on the central shaft 51, a driven wheel 53, and at least one for connecting the driven wheel 53 and the push rod. drive wheel. The driving wheel 52 and the driven wheel 53 are arranged adjacent to each other along the axial direction of the central shaft 51 . The transmission wheel includes a first transmission wheel 541 that meshes with the driven wheel 53 and a second transmission wheel 542 that connects the first transmission wheel 541 and the push rod 3 , the push rod 3 faces the second transmission wheel 542 . A rack 31 meshing with the second transmission wheel 542 is formed on one side of the transmission wheel 542 . Different transmission ratios of the first transmission wheel 541 and the second transmission wheel 542 can be set according to actual door opening requirements. The first transmission wheel 541 is correspondingly provided with a first pivot shaft 543, and the second transmission wheel 542 is correspondingly provided with a second pivot shaft 544. The first pivot shaft 543 and the second pivot shaft 544 are fixed on the base. The first pivot shaft 543 and the second pivot shaft 544 are arranged on the base 1 in parallel with the central shaft 51 .

The central shaft 51 has a fixed end 511 disposed on the side of the driven wheel 53 away from the driving wheel 52 and used for fixing to the base 1 . The first transmission wheel 541 has a first engagement portion 5411 and a second engagement portion 5412 disposed adjacently along the axial direction of the central shaft 51 , and the first engagement portion 5411 is engaged with the driven wheel 53 . The second transmission wheel 542 has a third engaging portion 5421 and a fourth engaging portion 5422 adjacently disposed along the axial direction of the central shaft 51 , wherein the third engaging portion 5421 and the second engaging portion 5412 are aligned. Meshing, the second meshing portion 5422 is meshed and connected with the rack 31 . Thereby, when the driven wheel 53 rotates, it drives the push rod 3 to move; conversely, when the push rod 3 moves along its extending direction, it also makes the first transmission wheel 541 , the second transmission wheel 542 and the push rod 3 move. The driving wheel 53 rotates accordingly.

The transmission assembly 5 also includes a guide wheel 55 and a link gear 56 arranged between the driving wheel 52 and the driven wheel 53, the guide wheel 55 is formed with a chute 551, and the link gear 56 is partially accommodated in the The chute 551 protrudes outward along the radial direction of the guide wheel 55 . The driven wheel 53 is formed with an inner gear 531 located on the outer circumference of the guide wheel 55 and spaced from the guide wheel 55 , and the interlocking gear 56 and the inner gear 531 mesh with each other.

The transmission assembly 5 also includes a linkage wheel 57 on the side of the driving wheel 52 away from the driven wheel 53 , a holder 58 fixed on the base 1 , and an elastic member 59 acting on the guide wheel 55 . . Here, the guide pulley 55 and the linkage pulley 57 are axially disposed on two sides of the driving pulley 52 , and the guide pulley 55 and the linkage pulley 57 are connected to each other so that they rotate synchronously in the circumferential direction. The holding seat 58 and the elastic member 59 are directly matched with the linkage wheel 57, and then act on the guide wheel 55, so as to realize the action of the linkage gear 56 in the chute 551, and facilitate the processing, design and assembly of the aforementioned components.

Referring to FIGS. 6 to 8 , two sides of the chute 551 are respectively formed with a first engaging rib 552 and a second engaging rib 553 that are adapted to the linkage gear 56 . The linkage gear 56 has a disengaged state, a first engagement state and a second engagement state. When the driving source 2 drives the driving wheel 52 to open and rotate in the first direction, it first drives the linkage gear 56 to move along the chute 551 . After meshing with the first meshing rib 552 , the linkage gear 56 is switched to the first engagement state, and drives the driven wheel 53 to rotate. Similarly, when the driving wheel 52 opens and rotates in the second direction opposite to the first direction, it first drives the linkage gear 56 to move along the chute 551 to mesh with the second meshing rib 553 , the linkage gear 56 is switched to the second engagement state, which drives the driven wheel 53 to rotate in the reverse direction. When the driving wheel 52 stops rotating, the elastic member 59 drives the guide wheel 55 and the driving wheel 52 to rotate relative to each other, so that the linkage gear 56 is in contact with the first meshing rib 552 and the second meshing rib 553 . When disengaged, the interlocking gear 56 returns to the disengaged state.

In this embodiment, the linkage gear 56 is provided with a fixed shaft 561 which is fixed to the driving wheel 52 along the axial direction of the central shaft 51 . The chute 551 has an accommodating portion 554 for accommodating the linkage gear 56 and a supporting portion 555 located on the side of the accommodating portion 554 away from the driving wheel 52 for supporting the fixed shaft 561 . One end of the shaft 561 facing away from the driving wheel 52 protrudes beyond the linkage gear 56 and is located in the support portion 555 . Here, the first engaging protruding rib 552 and the second engaging protruding rib 553 are formed on both sides of the sliding groove 551 in the circumferential direction, and both the first engaging protruding rib 552 and the second engaging protruding rib 553 are along the center The axial extension of the shaft 51 is provided. The interlocking gear 56 is preferably arranged so that only when it is in the first engagement state or the second engagement state, the interlocking gear 56 engages with the first engaging rib 552 or the second engaging rib 553; When the 56 is in the separated state, it and the receiving portion 554 are kept separated from each other.

The support portion 555 is arranged in an arc shape along the central axis 51 , so that during the movement of the fixed shaft 561 along the support portion 555 , the interlocking gear 56 and the ring gear 531 maintain mutual meshing state. Preferably, the angular range of the fixed shaft 561 moving from one side of the support portion 555 to the other side is equal to the angular range of the linkage gear 56 moving from one side of the receiving portion 554 to the other side, and In other words, when the interlocking gear 56 moves to engage with the first engaging rib 552 or the second engaging rib 553, the fixed shaft 561 and the supporting portion 555 are just adjacent to the first engaging rib 552 or the second engaging rib 553. One side of the second engaging ribs 553 abuts against each other.

The angular range of the sliding groove 551 along the circumferential direction corresponds to the angular variation range of the interlocking gear 56 switched from the first engagement state to the second engagement state. Preferably, the interlocking gear 56 in the disengaged state is located in the middle position of the chute 551 , and the interlocking gear 56 can rotate freely in the chute 551 . According to actual verification, the driving wheel 52 starts to rotate from a standstill, and the angle change range for driving the linkage gear 56 to switch from the disengaged state to the first engagement state or the second engagement state is preferably set to 10-30°.

When the linkage gear 56 is in the first engagement state or the second engagement state, in order to make the transmission force between the driving wheel 52 and the driven wheel 53 more uniform and reduce wear and tear, the chute 551 is preferably provided. There are two and two of the sliding grooves 551 are symmetrically arranged with respect to the central axis 51 , and the linkage gears 56 are also arranged in two and are respectively located in the two sliding grooves 551 .

Here, the driving wheel 52 includes a driving wheel 521 and a driving ring gear 522 arranged along the outer circumference of the driving wheel 521 and matched with the worm 23 . A receiving cavity 523 is formed in the driving ring gear 522 ; the inner gear ring 531 is disposed in the receiving cavity 523 in a protruding manner, and the outer peripheral surface 532 of the inner gear ring 531 and the driving gear ring 522 are along a diameter to the interval setting. The driven wheel 53 also has a driven ring gear 533 located on the side of the inner gear 531 away from the driving wheel 52 , the driven ring gear 533 and the first meshing portion 5411 of the first transmission wheel 541 meshed.

The linkage wheel 57 includes a linkage wheel disk 571 and a mounting portion 572 formed on the side of the linkage wheel disk 571 away from the driving wheel 52 ; the elastic member 59 includes an elastic body 591 sleeved on the mounting portion 572 and a connecting portion 572 . to the first elastic arm 592 and the second elastic arm 593 of the elastic body 591 . The first elastic arm 592 and the second elastic arm 593 are arranged to cross each other. The driving wheel 52 further includes a first convex plate 524 protruding from the driving wheel disc 521 toward one side of the linkage wheel 57 . The wheel 57 is formed with a second convex plate 573 , the first convex plate 524 and the second convex plate 573 are both inserted between the first elastic arm 592 and the second elastic arm 593 , and the first convex plate Both the 524 and the second convex plate 573 are arranged in an arc-shaped plate shape. Here, the linkage wheel 571 is further formed with an opening 574 which is matched with the first convex plate 524 , and the second convex plate 573 is located on the side of the opening 574 . The opening 574 is arranged in an arc shape along the central axis 51 , and the angle range of the rotation of the first convex plate 524 from one side of the opening 574 to the other side of the opening 574 is set to be greater than or equal to the linkage gear 56 Angular variation range of switching from the first engagement state to the second engagement state. Preferably, the angle range of the opening 574 relative to the circumferential direction of the central axis 51 corresponds to the angle range of the chute 551 along the circumferential direction.

The linkage wheel 571 is also formed with a matching groove 575 symmetrically arranged relative to the central axis 51 . And when the interlocking gear 56 is in the engaged state, the first convex plate 524 is in contact with one side of the opening 574, and at the same time, the matching convex plate 525 is in contact with one side of the interlocking groove 575, so that the interlocking wheel 57 rotates with the rotation of the driving wheel 52 to distribute stress evenly.

A central through hole 526 is also formed in the middle position of the driving wheel 521 , and a shaft sleeve 576 sleeved on the central shaft 51 is formed in the middle position of the linkage wheel 571 . The shaft sleeve 576 has a first matching portion 5761 matched with the central through hole 526 , so that the driving wheel 52 can rotate around the first matching portion 5761 . The shaft sleeve 576 also has a second matching portion 5762 connected to the guide wheel 55 , the second matching portion 5762 is arranged in a hexagonal shape, and the guide wheel 55 is correspondingly provided with the second matching portion 5762 The matching and hexagonal socket 556 makes the guide wheel 55 rotate synchronously with the linkage wheel 57 .

The holding base 58 includes a base body 581 , a cover body 582 , and a holding sleeve 583 disposed between the base body 581 and the cover body 582 and fixed to the base body 581 . The middle position of the seat body 581 is provided with a fixing hole 5811 for fixing the central shaft 51 ; the cover body 582 and the driving wheel 52 are arranged in a gap; the linkage wheel 571 is located between the seat body 581 and the cover body 582, and the linkage wheel 571 and the holding sleeve 583 are arranged in a gap. The holding seat 58 further includes an elastic clip 584 disposed between the holding sleeve 583 and the linkage wheel 57 . When the driving wheel 52 stops rotating, the elastic clip 584 is used to fix the linkage wheel 57 . inside the retaining sleeve 583 .

The elastic clamp 584 has a C-shaped retaining ring 5841 extending circumferentially along the inner surface of the holding sleeve 583 and a resisting arm 5842 protruding from the end of the C-shaped retaining ring 5841 toward the linkage wheel 57 . The linkage wheel 571 is formed with a pressing portion 577 that cooperates with the pressing arm 5842 . When the driving wheel 52 exerts a force exceeding a preset threshold on the linkage wheel 57, the pressing portion 577 presses the pressing arm 5842 to cause the C-shaped snap ring 5841 to shrink and deform in the radial direction, so The elastic clamp 584 releases the tightening state of the linkage wheel 57 , and the linkage wheel rotates in the holding seat 58 . When the driving wheel 52 stops rotating, the elastic clamp 584 is restored to a state where the linkage wheel 57 and the holding seat 58 are locked.

In addition, the clutch automatic door opening device 100 further includes a travel switch matched with the transmission wheel. Specifically, a cam portion 5423 is formed on one side of the second transmission wheel 542 ; the travel switch includes a connecting rod 61 and a micro switch (not shown) disposed at one end of the connecting rod 61 . As shown in FIG. 9 , the connecting rod 61 has a trigger portion 611 pressing against the micro switch, a socket portion 612 sleeved on the cam portion 5423 and connecting the trigger portion 611 with the socket The connecting part 613 of the part 612 . The socket portion 612 is formed with a protrusion 614. During the rotation of the second transmission wheel 542, the cam portion 5423 cooperates with the protrusion 614 to realize the triggering of the micro switch, thereby realizing the push rod 3 Stroke detection and control.

Referring to FIG. 10 , the present invention further provides a refrigerator 200 using the aforementioned clutch automatic door opening device 100 . The refrigerator 200 has a box body 201 and a door body 202 disposed on the front side of the box body 201 . The clutch automatic door opening device 100 is installed on the box body 201 and is disposed adjacent to the front opening of the box body 201 ; the door body 202 is pivotally mounted on the box body 201 . Of course, the door body 202 can also be configured as a pull-out door body. The push rod 3 is extended along the front and rear direction, and the push rod 3 can push the door body 202 away from the box body 201 under the driving of the driving source 2 and the transmission assembly 5, so as to facilitate the user to open the door.

To sum up, with the clutch automatic door opening device 100 and the refrigerator of the present invention, when the driving wheel 52 opens and rotates, it first drives the linkage gear 56 to switch to the first engagement state or the second engagement state, and then drives the guide wheel 55 and the driven wheel. 53 rotate together; when the driving wheel 52 stops rotating, the elastic member 59 drives the guide wheel 55 and the driving wheel 52 to rotate relative to each other, and the linkage gear 56 returns to the separated state. The clutch automatic door opening device 100 can realize the switching of the cooperation state between the driving wheel 52 and the driven wheel 53 through the movement of the linkage gear 56 in the chute 551 to realize the automatic door opening, and when the door is completed, the driving wheel 52 is driven Reverse rotation will return the push rod 3 into the installation space of the base 1, the structure is more durable and reliable, preventing accidental impact damage, safer use, and improving user experience.

It should be understood that although this specification is described in terms of embodiments, not every embodiment only includes an independent technical solution, and this description in the specification is only for the sake of clarity, and those skilled in the art should take the specification as a whole, and each The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions listed above are only specific descriptions for the feasible embodiments of the present invention, and they are not used to limit the protection scope of the present invention. Changes should all be included within the protection scope of the present invention.

Claims (10)

1. The utility model provides an automatic door opener of separation and reunion, includes base, driving source, push rod and sets up transmission assembly between driving source and the push rod, the push rod movable mounting in base, its characterized in that: the transmission assembly comprises a central shaft fixed on the base, a driving wheel and a driven wheel sleeved on the central shaft, and a guide wheel arranged between the driving wheel and the driven wheel, the driving wheel is connected to the output end of a driving source, and the driven wheel is used for driving the push rod to move;

the transmission assembly comprises a transmission assembly, a driven wheel, a guide wheel, a transmission assembly, a linkage gear and an elastic part, wherein the driven wheel is provided with an inner gear ring which is positioned on the periphery of the guide wheel and is arranged at an interval with the guide wheel, a chute is formed on the guide wheel, the linkage gear is arranged in the chute and is meshed with the inner gear ring, the elastic part acts on the guide wheel, and a first meshing convex edge and a second meshing convex edge which are matched with the linkage gear are respectively formed on two sides of the chute in the circumferential direction relative to a central shaft;

the linkage gear is provided with a separation state, a first joint state and a second joint state, when the driving wheel is opened and rotated along a first direction, the linkage gear is driven to move along the sliding groove to be meshed with the first meshing convex edge, and the linkage gear is switched to the first joint state to drive the driven wheel to rotate; when the driving wheel is started to rotate along a second direction opposite to the first direction, the linkage gear is driven to move along the sliding groove to be meshed with the second meshing convex edge, and the linkage gear is switched to a second joint state to drive the driven wheel to rotate reversely;

when the driving wheel stops rotating, the elastic piece drives the guide wheel and the driving wheel to rotate relatively, so that the linkage gear is separated from the first meshing convex edge and the second meshing convex edge, and the linkage gear returns to a separated state.

2. The clutched automatic door opener of claim 1, wherein: the linkage gear is provided with a fixed shaft which is fixed on the driving wheel along the axial direction of the central shaft.

3. The clutched automatic door opener of claim 2, wherein: the sliding groove is provided with a containing part used for containing the linkage gear and a supporting part located on one side of the containing part, which deviates from the driving wheel, and used for supporting the fixing shaft, and one end, which deviates from the driving wheel, of the fixing shaft extends beyond the linkage gear and is located in the supporting part.

4. The clutched automatic door opener of claim 3, wherein: the supporting part is arc-shaped along the central shaft.

5. The clutched automatic door opener of claim 3, wherein: the first engaging convex edge and the second engaging convex edge are formed on two sides of the accommodating part relatively, and the first engaging convex edge and the second engaging convex edge are arranged along the axial extension of the central shaft.

6. The clutched automatic door opener of claim 3, wherein: when the linkage gear moves to be meshed with the first meshing convex edge or the second meshing convex edge, the fixed shaft is just abutted against one side of the supporting part, which is adjacent to the first meshing convex edge or the second meshing convex edge.

7. The clutched automatic door opener of claim 1, wherein: the sliding grooves are arranged to be two, the sliding grooves are opposite to the central shaft and are symmetrically arranged, and the linkage gears are correspondingly arranged to be two and are respectively positioned in the two sliding grooves.

8. The clutched automatic door opener of claim 1, wherein: the driving wheel comprises a driving wheel disc and a driving gear ring which is arranged along the periphery of the driving wheel disc and matched with the output end of the driving source, the driving gear ring forms an accommodating cavity, and the gear ring stretches into the accommodating cavity.

9. The clutched automatic door opener of claim 1, wherein: the transmission assembly further comprises a transmission wheel arranged between the push rod and the driven wheel.

10. The utility model provides a refrigerator, includes the box and sets up the door body of box front side, its characterized in that: the refrigerator further comprises an automatic clutch door opener according to any one of claims 1 to 9, which is mounted on the refrigerator body and is used for automatically opening the door body.

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