CN109629948B

CN109629948B - Automatic door opening device with clutch mechanism and control method

Info

Publication number: CN109629948B
Application number: CN201910122870.9A
Authority: CN
Inventors: 李爱华; 庄宁锋; 王传彬
Original assignee: Nanjing Zhongjingke Intelligent Technology Co ltd
Current assignee: Nanjing Zhongjingke Intelligent Technology Co ltd
Priority date: 2019-02-19
Filing date: 2019-02-19
Publication date: 2023-12-29
Anticipated expiration: 2039-02-19
Also published as: CN109629948A

Abstract

The invention relates to the technical field of refrigerators and discloses an automatic door opening device with a clutch mechanism and a control method. The automatic door opening device with the clutch mechanism comprises a mounting shell, an ejection mechanism arranged in the mounting shell, and a driving motor, wherein the driving motor is arranged in the mounting shell, and a worm is arranged at the output end of the driving motor; the input end of the multistage transmission gear set is connected with the worm in a transmission way, and the output end of the multistage transmission gear set can drive the ejection mechanism to move in a telescopic way relative to the installation shell; and the clutch mechanism can push the input end of the multistage transmission gear set to be separated from or meshed with the worm. The automatic door opening device disclosed by the invention is completely compatible with the original manual opening and closing operation without changing the original working state of automatically or manually opening and closing the door, and solves the problem that the door body cannot be closed when the device fails or fails in the middle of opening the door.

Description

Automatic door opening device with clutch mechanism and control method

Technical Field

The invention relates to the technical field of refrigerators, in particular to an automatic door opening device with a clutch mechanism and a control method.

Background

The existing automatic door opening mechanism of the refrigerator is additionally provided with an auxiliary door opening ejection mechanism on the basis of a conventional manual door opening and closing mechanism, and if a fault or power failure occurs, the ejection mechanism is in an ejection state and mostly has no reset mechanism, so that the refrigerator cannot be closed.

In the prior patent document, CN201810316242.X discloses an automatic door opening device of a refrigerator, a motor drives a reduction gear set to drive a gear push rod assembly to reciprocate, so that the push rod assembly has uniform thrust and controllable speed, the inertia influence of the door opening of the refrigerator is reduced, and the use safety of a user is protected. And the push rod component is connected with the gear strip through threads, so that the influence on the closing of the door of the refrigerator caused by the gear latch tooth due to power failure is prevented. In the technical scheme, the refrigerator door is closed by removing the push rod assembly, so that the door closing problem during power failure or fault is solved temporarily, but the whole module function is in a missing state, and the door closing problem of the refrigerator in the power failure or fault state is not solved fundamentally.

Disclosure of Invention

The invention aims to provide an automatic door opening device with a clutch mechanism and a control method, which are completely compatible with the original manual opening and closing operation without changing the original working state of automatically or manually opening and closing a door, and solve the problem that a door body cannot be closed when the device fails or fails in the middle of opening the door.

To achieve the purpose, the invention adopts the following technical scheme:

the utility model provides an automatic door opener of taking clutch mechanism, including the installation casing with set up in ejection mechanism in the installation casing still includes:

the driving motor is arranged in the installation shell, and the output end of the driving motor is provided with a worm;

the input end of the multistage transmission gear set is connected with the worm in a transmission way, and the output end of the multistage transmission gear set can drive the ejection mechanism to move in a telescopic way relative to the installation shell;

and the clutch mechanism can push the input end of the multistage transmission gear set to be separated from or meshed with the worm.

Preferably, the multistage transmission gear set comprises a first gear, a second gear and a third gear which are sequentially meshed, the first gear, the second gear and the third gear are duplex gears, the first gear is meshed with the worm, and the third gear is in transmission connection with the input end of the ejection mechanism.

Preferably, the first gear includes a helical gear and a first tooth, the first tooth is disposed coaxially with the helical gear, and the helical gear meshes with the worm.

Preferably, the clutch mechanism includes:

the push rod assembly is arranged on the installation shell, and one end of the push rod assembly is exposed out of the installation shell;

the first supporting piece supports the push rod assembly, a first elastic piece is arranged between the push rod assembly and the first supporting piece, the first elastic piece can reset the push rod assembly and press the push rod assembly, and the push rod assembly pushes the bevel gear to be separated from the worm;

a reset assembly configured to reengage the disengaged helical gear with the worm.

Preferably, the reset assembly includes:

the second support piece is spaced from the end face of the bevel gear by a preset distance and can extend out of the mounting shell;

the second elastic piece is propped between the installation shell and the second supporting piece, and the second elastic piece pushes the second supporting piece to enable the bevel gear to be meshed with the worm again.

Preferably, the second support member is close to one end of the installation casing is provided with the buckle body, the buckle body includes interconnect's connecting portion and joint, be provided with on the installation casing with joint complex buckle hole, connecting portion can stretch out the buckle hole.

Preferably, one of the second support piece and the mounting shell is provided with a sliding groove, and the other is provided with a sliding block matched with the sliding groove.

Preferably, the push rod assembly comprises:

the pushing rod is arranged on the first supporting piece;

and the pushing rod pushes the connecting rod assembly, and the connecting rod assembly can enable the bevel gear to be disengaged from the worm.

Preferably, the link assembly includes:

the clutch plate and the third supporting piece are arranged on the installation shell, and one end of the clutch plate is rotatably connected with the third supporting piece;

one end of the pushing rod is provided with an inclined surface, the clutch plate is provided with a sliding surface matched with the inclined surface, the pushing rod is pressed, the inclined surface slides along the sliding surface, and the clutch plate pushes the bevel gear to be separated from the worm.

Preferably, the mounting shell comprises an upper shell and a lower shell which are buckled with each other, mounting grooves are formed in the upper shell and the lower shell, and the mounting grooves can accommodate mounting screws or nuts.

Preferably, the mounting groove includes a groove and a through hole, one end of the through hole is communicated with the bottom of the groove, the through hole is communicated with the inside of the mounting shell, and the groove is used for accommodating the head of the mounting screw or the nut.

Preferably, the grooves are regular hexagonal grooves.

Preferably, the groove is a regular hexagon groove, a protrusion is arranged on the inner side wall of the groove, and when the nut is accommodated in the groove, the outer wall of the nut is pressed against the protrusion.

Preferably, after the upper shell and the lower shell are buckled, the through holes on the upper shell and the lower shell are arranged in a positive opposite way.

Preferably, the number of the mounting grooves on the upper shell and the lower shell is three.

The invention also provides a control method of the automatic door opening device with the clutch mechanism, which comprises the following steps:

receiving an action command, driving a motor to act, and driving an ejection mechanism to execute ejection or retraction;

when the driving motor stops working and the ejection mechanism is not in a retracted state, the clutch mechanism is pressed to drive the input end of the multistage transmission gear set to be separated from the worm;

pushing the ejection mechanism to retract, and releasing the clutch mechanism to enable the input end of the multistage transmission gear set to be meshed with the worm again.

The invention has the beneficial effects that: according to the invention, the multistage transmission gear set is driven by the driving motor to carry out speed reduction transmission, so that the ejection mechanism is driven to eject. When the ejection mechanism is in a certain ejection state, faults or power failure occur, and the driving motor stops working, the clutch mechanism can drive the input end of the multistage transmission gear set to be disengaged from the worm. At this time, the ejection mechanism is reset manually, so that the problems of automatic ejection and manual reset are solved.

Drawings

FIG. 1 is a schematic view of an automatic door opener with clutch mechanism of the present invention;

FIG. 2 is a schematic view of the structure of the automatic door opener with clutch mechanism of the present invention (excluding the upper housing);

FIG. 3 is a schematic view of the structure of the automatic door opener with clutch mechanism of the present invention (excluding the upper housing and the control module);

FIG. 4 is a schematic view of the upper housing of the present invention at an angle;

FIG. 5 is a schematic view of the structure of the lower housing of the present invention;

FIG. 6 is a front view of the structure of FIG. 3 at I of the present invention;

FIG. 7 is a schematic view of the structure of the automatic door opener with clutch mechanism of the present invention (excluding the upper housing, the control module and the lower housing);

FIG. 8 is a schematic diagram of the drive motor and multi-stage drive gear set of the present invention;

FIG. 9 is a schematic structural view of an ejection mechanism of the present invention;

FIG. 10 is a schematic view of the structure of the lower housing of the present invention;

FIG. 11 is a partial schematic view of the lower housing and clutch mechanism of the present invention;

FIG. 12 is a schematic view of the structure of the push rod of the present invention;

FIG. 13 is a schematic view of the push rod assembly and one angle of rotation shaft of the present invention;

FIG. 14 is a schematic view of another angle configuration of the push rod assembly and the rotary shaft of the present invention;

FIG. 15 is a schematic view of the structure of the second support of the present invention at an angle;

FIG. 16 is a schematic view of another angle configuration of the second support of the present invention;

fig. 17 is a schematic view of another angle structure of the upper case of the present invention.

In the figure:

1. a mounting shell; 11. an upper housing; 111. a snap hole; 112. a slide block; 113. a mounting groove; 1131. a groove; 11311. a protrusion; 1132. a through hole;

12. a lower housing;

2. an ejection mechanism; 21. a rack; 22. an ejector rod; 23. ejecting the anti-collision block; 24. a first position switch; 25. a second position switch;

3. a driving motor;

4. a worm;

5. a multi-stage drive gear set; 51. a first gear; 511. bevel gear; 512. a first tooth;

52. a second gear; 521. a second tooth; 522. a third tooth;

53. a third gear; 531. a fourth tooth; 532. a fifth tooth; 54. a rotating shaft;

6. a clutch mechanism; 61. a push rod assembly; 611. a push rod; 6111. a support part; 6112. a push rod part; 6113. an elastic member supporting part; 6114. pressing a key; 612. a connecting rod assembly; 6121. a clutch plate; 6122. a third support;

62. a first support;

63. a first elastic member;

64. a reset assembly; 641. a second support; 6411. a buckle body; 64111. a connection part; 64112. a clamping joint; 6412. a chute; 642. a second elastic member;

7. and a control module.

Detailed Description

The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. The components of the embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present invention, it should be noted that, directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present invention and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be configured and operated in a specific direction, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

As shown in fig. 1, in the present embodiment, an automatic door opening device with a clutch mechanism is disclosed, which includes a mounting housing 1 and an ejector mechanism 2 provided in the mounting housing 1. The refrigerator comprises a refrigerator body and a refrigerator door, wherein the mounting shell 1 of the automatic door opening device is arranged at the outer side of the upper part of the refrigerator body and is close to the refrigerator door, the ejection mechanism 2 pushes the refrigerator door, the door sealing force of the refrigerator door is overcome, the refrigerator door is opened for a certain gap, and then the refrigerator door is opened or closed by utilizing other automatic door opening and closing structures.

As shown in fig. 2 and 3, the automatic door opening device with a clutch mechanism in this embodiment includes a driving motor 3, a multi-stage transmission gear set 5 and a clutch mechanism 6, the driving motor 3 is disposed in the installation housing 1, and a worm 4 is disposed at an output end of the driving motor 3. The input end of the multistage transmission gear set 5 is connected with the worm 4 in a transmission way, and the output end of the multistage transmission gear set 5 can drive the ejection mechanism 2 to move in a telescopic way relative to the installation shell 1. The clutch mechanism 6 can push the input end of the multi-stage transmission gear set 5 to be disengaged or engaged with the worm 4.

In this embodiment, the driving motor 3 drives the multi-stage transmission gear set 5 to drive, and the output end of the multi-stage transmission gear set 5 is connected to the ejection mechanism 2 in a transmission manner, so that the ejection mechanism 2 can extend or retract relative to the mounting housing 1.

The automatic door opening device with the clutch mechanism in the embodiment further comprises a control module 7, wherein the control module 7 is responsible for communication with a refrigerator control system, and the ejection mechanism 2 acts according to the control logic requirement.

Optionally, the installation housing 1 (as shown in fig. 1) in the present embodiment includes an upper housing 11 and a lower housing 12 that are fastened to each other, and the upper housing 11 is covered on the lower housing 12. The automatic door opening device with the clutch mechanism is applied to the left refrigerator door and the right refrigerator door of the refrigerator, when the automatic door opening device is installed, the automatic door opening devices arranged on the two side doors of the refrigerator are symmetrically installed, the upper shell 11 of the automatic door opening device installed on one side refrigerator door is located above, and the upper shell 11 of the other side refrigerator door is located below.

Specifically, as shown in fig. 4 to 6, the upper case 11 and the lower case 12 are provided with mounting grooves 113, and the mounting grooves 113 can accommodate mounting screws or nuts. The mounting groove 113 in this embodiment is a stepped through hole 1132 or a through hole 1132. The specific structural form and size of the mounting groove 113 may be determined according to actual practice.

The mounting groove 113 in this embodiment is a stepped groove, the mounting groove 113 includes a groove 1131 and a through hole 1132, one end of the through hole 1132 is connected to the bottom of the groove 1131, the through hole 1132 is connected to the inside of the mounting housing 1, and the groove 1131 is used for accommodating the head or the nut of the mounting screw.

Preferably, the grooves 1131 are regular hexagonal grooves. The head or the nut of the mounting screw is regular hexagon, or the mounting screw is a round head screw, and the regular hexagon groove is used for accommodating the head or the nut of the mounting screw. The through hole 1132 is a circular through hole 1132.

Alternatively, the groove 1131 may be a circular hole, and the diameter of the groove 1131 is larger than the diameter of the through hole 1132.

Preferably, the inner side wall of the groove 1131 is provided with a protrusion 11311 (as shown in fig. 6), and the outer wall of the nut is pressed against the protrusion 11311. Since the grooves 1131 are regular hexagonal grooves, protrusions 11311 are disposed on the sidewalls of the grooves 1131. When the nut is received in the groove 1131, the protrusion 11311 is in interference fit with the nut, and the protrusion 11311 can fasten the nut to prevent the nut from rotating. Preferably, there are three protrusions 11311. The protrusions 11311 are uniformly distributed on the inner wall of the groove 1131. The protrusions 11311 are formed in a triangular shape in cross section. Alternatively, the cross section of the protrusion 11311 may also be circular arc. Or a polygon, or other shape. The particular form of the protrusions 11311 may be selected according to actual needs.

Preferably, after the upper and lower cases 11 and 12 are fastened, the through holes 1132 of the upper and lower cases 11 and 12 are disposed right opposite to each other. I.e., the through holes 1132 of the upper and lower cases 11 and 12 communicate.

Preferably, the number of the mounting grooves 113 on the upper case 11 and the lower case 12 is three.

In the present embodiment, the case where the upper case 11 of the automatic door opening device is located above will be described as an example.

Fig. 7 is a schematic structural view of a driving motor, a multi-stage transmission gear set and an ejection mechanism, and fig. 8 is a schematic structural view of the multi-stage transmission gear set and the driving motor. As shown in fig. 7 and 8, the multi-stage driving gear set 5 includes a first gear 51, a second gear 52, and a third gear 53 that are sequentially meshed, where the first gear 51, the second gear 52, and the third gear 53 are all duplex gears, the first gear 51 is meshed with the worm 4, and the third gear 53 is in driving connection with the input end of the ejection mechanism 2.

The first gear 51 includes a helical gear 511 and a first tooth 512, the first tooth 512 being disposed coaxially with the helical gear 511, the helical gear 511 meshing with the worm 4. Optionally, the first tooth 512 is located below the bevel gear 511.

The second gear 52 includes a second tooth 521 and a third tooth 522, the second tooth 521 being located below the third tooth 522, the first tooth 512 being meshed with the second tooth 521. The third gear 53 includes a fourth tooth 531 and a fifth tooth 532, the fourth tooth 531 being located below the fifth tooth 532, the third tooth 522 being meshed with the fourth tooth 531. The fifth tooth 532 is used as an output gear to mesh with the input end of the ejection mechanism 2, so as to drive the ejection mechanism 2 to extend or retract.

Alternatively, the second gear 52 and the third gear 53 in the present embodiment each include a large-tooth-number gear and a small-tooth-number gear, and the small-tooth-number gear of the previous stage transmission meshes with the large-tooth-number gear of the next stage. Through the meshing transmission of the gears, the driving motor 3 realizes the speed reduction transmission through the multistage transmission gear set 5.

In this embodiment, the worm 4 and the helical gear 511 are adopted for transmission, and because each gear in the multi-stage transmission gear set 5 is a plastic part, the worm gear mechanism is adopted for transmission under each gear structure size in the structure, and the meshing teeth of the turbine are arc structures, so that the injection molding is difficult to realize due to small structure size, the precision is difficult to ensure, and the production cost is high. In this embodiment, the helical gear 511 can be used to replace the turbine because the bearing force between the front-stage transmissions is smaller, the worm 4 and the helical gear 511 can be meshed for transmission to ensure the required bearing force, and meanwhile, the helical gear 511 is simple to manufacture and low in cost.

In addition, if the worm and gear structure is adopted for transmission engagement, after the worm and gear structure is disengaged, the worm and gear structure is in surface contact with each other when being engaged again, and the gap between the engagement teeth is small, so that the smooth engagement can not be ensured when being engaged again.

In this embodiment, the helical gear 511 is engaged with the worm 4, and when the helical gear 511 is disengaged from the worm 4 and is engaged again, the helical gear 511 is in line contact with the worm 4, and when the meshing teeth of the helical gear 511 enter the worm 4, a gap exists between the adjacent helical teeth of the helical gear 511, so that the helical gear 511 easily enters the worm 4. Meanwhile, in the process of entering the worm 4, because a gap exists between a single meshing tooth of the helical gear 511 and two adjacent helical teeth of the worm 4, after the helical gear 511 contacts the worm 4, if the meshing is incomplete, the worm 4 drives the helical gear 511 to rotate slightly along the rotating shaft 54, and the teeth of the helical gear 511 have adjustment spaces between the teeth of the worm 4, so that the helical gear 511 and the worm 4 are completely meshed. This process corresponds to the fact that the worm 4 drives the bevel gear 511 to be self-adjusting, so that the worm 4 and the bevel gear can be meshed quickly, and the meshing effect is guaranteed. In addition, the two materials cannot be mutually gnawed, and the service life of the whole structure is further ensured.

As shown in fig. 7 and 9, the above-mentioned ejector mechanism 2 includes a rack 21 and an ejector rod 22, wherein the rack 21 is disposed in the front-rear direction of the lower case 12 in fig. 3, and the rack 21 and the output end of the multistage transmission gear set 5. Specifically, the rack 21 is in meshed transmission with the fifth tooth 532. The length direction of the ejector rod 22 is set in the front-rear direction, and a gear is connected to the ejector rod 22 and located in the installation housing 1. The mounting housing 1 is provided with an outlet from which the ejector rod 22 can extend out of the mounting housing 1.

Optionally, an end of the ejector rod 22 contacting the refrigerator door is provided with an ejector anti-collision block 23, which reduces noise during contact with the refrigerator door, and at the same time, protects the refrigerator door from damage.

Optionally, the ejection mechanism 2 further includes a sliding slot (as shown at C in fig. 10) and a sliding block (as shown at a in fig. 9), one of the lower housing 12 or the ejector rod 22 is provided with a sliding slot, and the other one of the two is provided with a sliding block, and the sliding block cooperates with the sliding slot to slide in the front-rear direction. The slider (at a shown in fig. 9) in this embodiment is provided on the right side of the ejector rod 22, and the chute (at C shown in fig. 10) is provided on the lower case 12.

Optionally, as shown in fig. 3, the automatic door opening device with a clutch mechanism in this embodiment further includes a first position switch 24 and a second position switch 25. The first position switch 24 and the second position switch 25 are both disposed in the lower housing 12, and are disposed at a predetermined distance in the front-rear direction. The first position switch 24 is configured to detect an initial position of the rack 21. The second position switch 25 is configured to detect a limit position of movement of the rack 21 when the ejector rod 22 is at a maximum stroke.

After the automatic door opening mechanism receives the door opening instruction, the driving motor 3 starts to act, for example, the driving motor 3 rotates forward at the moment, and through the speed reduction transmission of the multi-stage transmission gear set 5, the fifth tooth 532 at the output end of the multi-stage transmission gear set 5 is meshed with the rack 21 connected with the rear part of the ejector rod 22, so that the ejector rod 22 slides forward along the sliding groove 6412 in the lower shell 12. When the rack 21 drives the ejector rod 22 to move forward until touching the second position switch 25, the driving motor 3 is driven to stop rotating forward, and the ejector rod 22 is in the maximum extension state. If the structure is applied to the refrigerator, the refrigerator door is opened by a certain gap against the door sealing force of the refrigerator door. Then the driving motor 3 starts to rotate reversely, the output end (fifth tooth 532) of the multistage transmission gear is meshed with the rack 21 through the reduction transmission of the multistage transmission gear set 5, so that the ejector rod 22 moves backwards along the sliding groove in the lower shell 12, and when the rack 21 touches the first position switch 24, the driving motor 3 stops reversing, and the door opening action is completed.

As shown in fig. 3, the clutch mechanism 6 includes a push rod assembly 61, a first support 62, and a reset assembly 64 (as shown in fig. 3, 7, and 8), wherein, as shown in fig. 3, the push rod assembly 61 is disposed on the mounting housing 1, and one end of the push rod assembly 61 is exposed to the mounting housing 1. The first supporting member 62 supports the push rod assembly 61, a first elastic member 63 is arranged between the push rod assembly 61 and the first supporting member 62, the first elastic member 63 enables the push rod assembly 61 to reset, the push rod assembly 61 is pressed, and the push rod assembly 61 pushes the bevel gear 511 to be separated from the worm 4. The reset assembly 64 is configured such that the disengaged bevel gear 511 reengages the worm 4.

One end of the push rod assembly 61 is exposed to the mounting housing 1 and used as a push button, when the ejector mechanism 2 fails or is powered off in the middle of being ejected outwards or retracted inwards, the driving motor 3 stops working, and at this time, the ejector rod 22 of the ejector mechanism 2 is jammed in the middle, and the output shaft of the motor cannot be used as an input end, so that the ejector rod 22 cannot be directly pressed manually, and the ejector rod 22 is retracted.

At this time, it is necessary to manually press the push rod assembly 61, and the push rod assembly 61 acts on the first gear 51 to disengage the bevel gear 511 from the worm 4. Then, the push rod assembly 61 is released by manually pushing the push rod 22 to retract, the first elastic member 63 resets the push rod assembly 61, and the reset assembly 64 reengages the helical gear 511 of the first gear 51 with the worm 4. When the power is on or the fault is removed, the driving motor 3 can work normally again.

As shown in fig. 11, fig. 11 is a partial structural schematic view of the lower housing and the clutch mechanism 6, and alternatively, the push rod assembly 61 in the present embodiment includes a push rod 611 and a link assembly 612. Wherein the pushing rod 611 is disposed on the first support 62. When the push rod 611 is pressed, the push rod 611 pushes the link assembly 612, and the link assembly 612 disengages the bevel gear 511 from the worm 4. After the push rod and the push rod are separated, the push rod 22 is pushed to retract manually, the push rod 611 is loosened, the push rod 611 is reset under the action of the first elastic piece 63, and the reset assembly 64 enables the bevel gear 511 to be meshed with the worm 4 again.

As shown in fig. 12, the pushing rod 611 includes a supporting portion 6111, a pushing rod portion 6112 disposed on the supporting portion 6111, and elastic member supporting portions 6113 disposed on the supporting portion 6111 and symmetrically disposed on both sides of the pushing rod portion 6112. As shown in fig. 13 and 14, the push rod portion 6112 is configured to push the link assembly 612, and the first elastic member 63 is sleeved on the elastic member supporting portion 6113. Both ends of the first elastic member 63 are respectively pressed against the supporting portion 6111 and the first supporting member 62. The push rod portion 6112 and the elastic member support portion 6113 are provided on the same side of the support portion 6111, and a push key 6114 is provided on the other side of the push rod portion 6112, and the push key 6114 is exposed to the outside of the mounting case 1. When the ejector rod 22 cannot be retracted normally, pressing this key pushes the push rod 611.

Preferably, the first support 62 is integrally injection molded with the lower housing 12.

Optionally, the linkage assembly 612 in the present embodiment includes a clutch plate 6121 and a third support 6122. Wherein, third support 6122 sets up on installation casing 1, and third support 6122 and lower casing 12 are integrated into one piece injection molding. The push rod portion 6112 of the push rod 611 is provided with an inclined surface on an upper surface of one end thereof remote from the first elastic member 63, the inclined surface being inclined downward in a direction approaching the clutch plate 6121.

The clutch plate 6121 is in a rod-shaped structure, a rotating shaft is arranged at one end of the clutch plate 6121, which is close to the push rod portion 6112, and the rotating shaft is fixed on the third supporting piece 6122, and the clutch plate 6121 can rotate around the rotating shaft. The lower surface of the clutch plate 6121 is provided with a sliding surface that mates with the inclined surface. The push rod portion 6112 moves backward, and the sliding surface contacting with the clutch plate 6121 is composed of an inclined surface and an arc surface, and extends from the inclined surface to the arc surface from front to back. When the arc surface is arranged to ensure that the inclined surface contacts with the sliding surface, excessive noise cannot be generated, and the relative movement is ensured to be stable.

When the pushing rod 611 is pressed and the inclined surface slides along the sliding surface, and the pushing rod portion 6112 pushes the clutch plate 6121 backward, the clutch plate 6121 rotates about the rotating shaft, and the other end of the clutch plate 6121 pushes the first gear 51 upward to move axially along the rotating shaft 54 thereof, so that the helical gear 511 is disengaged from the worm 4.

Alternatively, the first gear 51 is provided on the rotation shaft 54, and the rotation shaft 54 is provided in the vertical direction. A through hole (here, the through hole is different from the through hole 1132 of the mounting groove 113 on the upper and lower cases 11 and 12) is provided below the clutch plate 6121, and the rotation shaft 54 is located in the through hole. When the push rod portion 6112 pushes the clutch plate 6121 to rotate, the end provided with the through hole is tilted upward relative to the rotation post 54, and pushes the first gear 51 on the rotation shaft 54 to move upward, so that the helical gear 511 is separated from the worm 4.

The lower end of the first gear 51 is provided with a limiting member, and when the reset assembly 64 resets the first gear 51, the limiting member limits the limiting position of the downward movement of the first gear 51. In the normal working state of the driving motor 3, one end of the clutch plate 6121 provided with the fork-shaped opening is kept in a certain gap with the first gear 51 and is not contacted with the first gear 51, so that friction is increased due to the contact between the first gear 51 and the clutch plate 6121, and resistance is avoided.

Alternatively, the push rod assembly 61 in other embodiments may also press the first gear 51 downward, disengaging the bevel gear 511 from the worm 4. The push rod portion 6112 and the clutch plate 6121 may be integrally formed on the basis of the above-described embodiment, and the bevel gear 511 may be separated from the worm 4 by converting the movement of the push rod portion 6112 in the front-rear direction into the movement in the vertical direction in combination with other structures.

Preferably, the first elastic member 63 in this embodiment is a spring.

As shown in fig. 2, 3 and 7 and 8, and fig. 12 and 13, in particular, as shown in fig. 7 and 8, the above-described return assembly 64 includes a second supporting member 641 and a second elastic member 642. The second supporting member 641 has a cylindrical structure, and a through hole (the through hole is different from the through holes 1132 in the upper and lower housings 11 and 12 and the through hole of the clutch plate 6121) is formed in the bottom of the second supporting member 641, and the second supporting member 641 is inserted into the rotation shaft 54 of the first gear 51 through the through hole, so that the second supporting member 641 can reciprocate in the vertical direction relative to the rotation shaft 54.

The second elastic member 642 is pressed between the mounting housing 1 and the bottom of the second support 641, and the second elastic member 642 pushes the second support 641 to reengage the helical gear 511 with the worm 4.

As shown in fig. 15 and 16, the second supporting member 641 is provided with a fastening body 6411 near one end of the mounting housing 1, the fastening body 6411 includes a connecting portion 64111 and a fastening head 64112 connected to each other, the mounting housing 1 is provided with a fastening hole 111 for mating with the fastening head 64112, and the connecting portion 64111 can extend out of the fastening hole 111 (shown in fig. 1). Alternatively, the connecting portion 64111 and the snap 64112 are circumferentially disposed on the outer wall of the second support 641. The connection portion 64111 and the buckle of the second support 641 can protrude out of the mounting case 1 during the reciprocation of the second support 641 in the vertical direction.

At the time of initial installation, as shown in fig. 7 and 8, the end of the second support 641, which is close to the bevel gear 511, is spaced apart from the end surface of the bevel gear 511 by a predetermined distance, i.e., the first gear 51 may be axially displaced between the upper surface of the clutch plate 6121 and the lower surface of the second support 641 by a small amount. In the present embodiment, in the structural state of the worm 4 and the helical gear 511 of the driving motor 3 shown in fig. 4, when the worm 4 rotates clockwise (i.e., clockwise in the state shown in fig. 7 and 8), the axial force generated by the worm 4 moves the first gear 51 axially upward and is kept in contact with the lower surface of the second support 641. When the worm 4 rotates counterclockwise (i.e., counterclockwise in the state shown in fig. 4 and 5), the axial force generated by the worm 4 moves the first gear 51 axially downward and maintains contact with the stopper.

Alternatively, one of the second support 641 and the mounting case 1 is provided with a slide groove 6412, and the other is provided with a slider 112 (shown in fig. 17) engaged with the slide groove 6412. The outer side of the outer wall of the second support 641 in the present embodiment is provided with a protrusion (here, the protrusion is shown in fig. 16) in the vertical direction to form a slide groove 6412, and the upper case 11 is provided with a slider 112. When the second supporter 641 slides in the vertical direction, the slider 112 reciprocates along the slide groove 6412.

The automatic door opening device with the clutch mechanism is applied to a refrigerator, overcomes the suction force of a refrigerator door seal through the ejection mechanism under the condition that the original door opening and closing state of the refrigerator is not changed, realizes the automatic control of the refrigerator door opening, can be manually reset when the power failure occurs, and solves the problem of automatic and manual compatibility.

The embodiment also provides a control method of the automatic door opening device with the clutch mechanism, which comprises the following steps:

receiving an action command, driving the motor 3 to act, and driving the ejection mechanism 2 to execute ejection or retraction;

when the driving motor 3 stops working and the ejection mechanism 2 is not in a retracted state, the clutch mechanism 6 drives the input end of the multistage transmission gear set 5 to be separated from the worm 4 by pressing the clutch mechanism 6;

pushing the ejector mechanism 2 to retract, releasing the clutch mechanism 6 to reengage the input end of the multi-stage drive gear set 5 with the worm 4.

The stopping of the driving motor 3 refers to abnormal stopping of the driving motor 3, that is, when the driving motor 3 fails, is powered off or a certain component of the automatic door opening device fails during the working process, the driving motor 3 cannot make the ejection mechanism 2 work and retract normally.

When the driving motor 3 works, the ejector rod 22 of the ejector mechanism 2 is driven to extend or retract.

When the ejection mechanism 2 is in the ejection state, that is, the ejection rod 22 is in any one of the extended states, the driving motor 3 stops working, the pushing rod 611 of the clutch mechanism 6 is pressed, the pushing part of the pushing rod 611 pushes the clutch plate 6121 to act, and one end of the clutch plate 6121 pushes the first gear 51 to act upwards, so that the bevel gear 511 is separated from the worm 4.

The ejector rod 22 of the ejector mechanism 2 is pushed to retract, at which time the push rod 61 is released and the reset assembly 64 reengages the input end of the multi-stage gearset with the worm 4.

It is to be understood that the above examples of the present invention are provided for clarity of illustration only and are not limiting of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.

Claims

1. The utility model provides an automatic door opener of area clutch mechanism, includes installation casing (1) and set up in ejection mechanism (2) in installation casing (1), its characterized in that still includes:

the driving motor (3), the driving motor (3) is arranged in the installation shell (1), and a worm (4) is arranged at the output end of the driving motor (3);

the input end of the multistage transmission gear set (5) is connected with the worm (4) in a transmission way, and the output end of the multistage transmission gear set (5) can drive the ejection mechanism (2) to move in a telescopic way relative to the mounting shell (1);

the clutch mechanism (6) can push the input end of the multistage transmission gear set (5) to be separated from or meshed with the worm (4);

the multistage transmission gear set (5) comprises a first gear (51), a second gear (52) and a third gear (53) which are sequentially meshed, wherein the first gear (51), the second gear (52) and the third gear (53) are duplex gears, the first gear (51) is meshed with the worm (4), and the third gear (53) is in transmission connection with the input end of the ejection mechanism (2);

the first gear (51) comprises a bevel gear (511) and a first tooth (512), the first tooth (512) is coaxially arranged with the bevel gear (511), and the bevel gear (511) is meshed with the worm (4);

the clutch mechanism (6) comprises:

the push rod assembly (61) is arranged on the installation shell (1), and one end of the push rod assembly (61) is exposed out of the installation shell (1);

a first supporting member (62), the first supporting member (62) supporting the push rod assembly (61), a first elastic member (63) being provided between the push rod assembly (61) and the first supporting member (62), the first elastic member (63) being capable of resetting the push rod assembly (61), pressing the push rod assembly (61), the push rod assembly (61) pushing the helical gear (511) to disengage from the worm (4);

-a reset assembly (64), the reset assembly (64) being configured to re-engage the helical gear (511) with the worm (4) after disengagement;

the reset assembly (64) includes:

a second support (641), the second support (641) being spaced a predetermined distance from an end surface of the helical gear (511), the second support (641) being capable of protruding out of the mounting housing (1);

a second elastic member (642), the second elastic member (642) being pressed between the mounting housing (1) and the second support member (641), the second elastic member (642) pushing the second support member (641) to enable the helical gear (511) to be meshed with the worm (4) again;

the push rod assembly (61) comprises:

a push rod (611) provided on the first support (62);

-a link assembly (612), said pushing rod (611) pushing said link assembly (612), said link assembly (612) being able to disengage said helical gear (511) from said worm (4);

the link assembly (612) includes:

a clutch plate (6121) and a third supporting piece (6122), wherein the third supporting piece (6122) is arranged on the installation shell (1), and one end of the clutch plate (6121) is rotationally connected with the third supporting piece (6122);

one end of the pushing rod (611) is provided with an inclined surface, the clutch plate (6121) is provided with a sliding surface matched with the inclined surface, the pushing rod (611) is pressed, the inclined surface slides along the sliding surface, and the clutch plate (6121) pushes the bevel gear (511) to be separated from the worm (4) upwards.

2. The automatic door opening device with the clutch mechanism according to claim 1, wherein a buckle body (6411) is arranged at one end, close to the mounting housing (1), of the second supporting member (641), the buckle body (6411) comprises a connecting portion (64111) and a clamping head (64112) which are connected with each other, a buckle hole (111) matched with the clamping head (64112) is formed in the mounting housing (1), and the connecting portion (64111) can extend out of the buckle hole (111).

3. The automatic door opening device with clutch mechanism according to claim 2, wherein one of the second support member (641) and the mounting housing (1) is provided with a slide groove (6412), and the other is provided with a slider (112) engaged with the slide groove (6412).

4. The automatic door opening device with the clutch mechanism according to claim 1, wherein the mounting housing (1) comprises an upper housing (11) and a lower housing (12) which are buckled with each other, mounting grooves (113) are formed in the upper housing (11) and the lower housing (12), and the mounting grooves (113) can accommodate mounting screws or nuts.

5. The automatic door opening device with clutch mechanism according to claim 4, wherein the mounting groove (113) comprises a groove (1131) and a through hole (1132), one end of the through hole (1132) is communicated with the bottom of the groove (1131), the through hole (1132) is communicated with the inside of the mounting shell (1), and the groove (1131) is used for accommodating the head of the mounting screw or the nut.

6. The automatic door opener with clutch mechanism according to claim 5, characterized in that the groove (1131) is a regular hexagonal groove.

7. The automatic door opening device with the clutch mechanism according to claim 5, wherein the groove (1131) is a regular hexagonal groove, a protrusion (11311) is arranged on the inner side wall of the groove (1131), and when the nut is accommodated in the groove (1131), the outer wall of the nut is pressed against the protrusion (11311).

8. The automatic door opening device with clutch mechanism according to claim 5, wherein after the upper housing (11) and the lower housing (12) are buckled, the through holes (1132) on the upper housing (11) and the lower housing (12) are arranged in a positive opposition.

9. The automatic door opening device with clutch mechanism according to claim 4, wherein the number of the mounting grooves (113) on the upper housing (11) and the lower housing (12) is three.

10. A control method of an automatic door opening device with a clutch mechanism according to any one of claims 1 to 9, comprising:

receiving an action command, driving a motor (3) to act, and driving an ejection mechanism (2) to execute ejection or retraction;

when the driving motor (3) stops working and the ejection mechanism (2) is not in a retracted state, the clutch mechanism (6) drives the input end of the multistage transmission gear set (5) to be separated from the worm (4) by pressing the clutch mechanism (6);

pushing the ejection mechanism (2) to retract, and releasing the clutch mechanism (6) to enable the input end of the multistage transmission gear set (5) to be meshed with the worm (4) again.