WO2018121571A1 - Automatic door opening device and refrigerator with automatic door opening device - Google Patents

Abstract

An automatic door opening device (100) and a refrigerator with the automatic door opening device (100). The automatic door opening device (100) comprises a base, a driving source component (2), a transmission body, and two pushing parts; the transmission body comprises two clutch gear groups (31); each clutch gear group (31) comprises two parts which are mutually and selectively connected, namely a first part and a second part; when a door body opening signal is received, each first part and the corresponding second part are connected to form a transmission state; and after the door body is opened, each first part and the corresponding second part are released from the transmission state.

Description

Automatic door opening device and refrigerator having the same

The present application claims the priority of the Chinese patent application entitled "Automatic door opening device and refrigerator having the same" as the application date is December 27, 2016, the application number is 201611227290.9, the entire contents of which are incorporated herein by reference. in.

Technical field

The invention belongs to the technical field of household appliance manufacturing, and in particular relates to an automatic door opening device and a refrigerator having the same.

Background technique

At present, the medium and high-grade refrigerators on the market are relatively large, and the weight of the door body, the load thereof and the door seal of the door body or the drawer type door body are relatively large, and more and more users feedback that the refrigerator door body is not easy to open. In response to this problem, an electric opening device has appeared.

In the existing electric opening device, in the process of opening the door body, the motor drives the screw rod to rotate forward, the screw rod meshes with the gear assembly, and then drives the rack push rod to drive the door body to open; when the door is opened, the motor drives the screw rod to reverse The screw gear meshes with the gear assembly, thereby driving the rack push rod to be reset; in the electric opening device, during the rack resetting process, the gear assembly needs to mesh the screw rod again, and the noise is large.

Therefore, it is necessary to provide an improved automatic door opening device and a refrigerator having the same to solve the above problems.

Summary of the invention

It is an object of the present invention to provide an automatic door opening device and a refrigerator having the same.

In an embodiment of the present invention, an automatic door opening device includes a base, a driving source member fixed in the base, and two pushing members for pushing the door body to open. And a transmission body for engaging the drive source member and the two pushers;

Each of the pushing members includes: a pushing rod and a first elastic member connected to the pushing rod and disposed away from the door body;

The transmission body includes: two sets of clutch gear sets respectively meshing with the two pushing members; each of the clutch gear sets includes: two portions selectively connected to each other, respectively being a first portion and a second portion, the first portion being The driving source members are in contact with each other, and the second portion is in contact with the pushing member;

Receiving the door opening signal, the first portion and the second portion of one of the at least two sets of clutch gears are connected to a transmission state, and the driving source member drives the clutch gear set currently in the transmission state to drive the current clutch gear The corresponding pushing member of the group moves outside the base to open the door body; and applies a force to the first elastic member toward the base;

After the door body is opened, the first part and the second part of the clutch gear set that is currently driven to open the door body are separated from the transmission state, and the first part of the current clutch gear set is kept in a static state, and the first elastic element pair is The push rod applies a tension to move the push rod into the base and drive the movement of its corresponding second portion of the clutch gear set.

As a further improvement of the embodiment of the present invention, one of the two clutch gear sets is an electric clutch gear set;

The electric clutch gear set includes an electric female gear that meshes with the drive source member, a rotor sub-gear provided to engage one of the pushers, and a terminal for selectively connecting the electric female gear and the motor sub-gear Electric clutch

The electric clutch member includes: an electric clutch and an electric clutch plate that are disposed to abut each other; the electric clutch is detachably coupled to the electric sub-gear, and the electric clutch plate is detachably coupled to the electric female gear;

Receiving the door opening signal, the electric clutch and the electric clutch plate are mutually attracted to detachably fix the electric female gear and the electric sub gear;

After the door body is opened, the electric clutch and the electric clutch plate are separated from each other to disengage the electric female gear and the electric sub-gear from the transmission state.

As a further improvement of the embodiment of the present invention, the rotor gear includes: a rotor gear engagement portion, and a rotor gear connection extending from the rotor gear engagement portion;

a plurality of meshing teeth are disposed on an outer wall of the meshing gear meshing portion;

The rotor gear connection portion includes: a first connection portion extending from the motor sub-gear engagement portion; a second connection portion extending from the first connection portion; the second connection portion being remote from the electric One end of the sub-gear engaging portion is provided with a first positioning groove;

The motor sub-gear engaging portion, the first connecting portion and the second connecting portion are coaxially disposed; the radial diameter of the first connecting portion is larger than a radial diameter of the second connecting portion; the motor sub-gear meshing portion Engaging the push rod setting;

The electric female gear portion is merged and sleeved to the first connecting portion;

The electric clutch piece is sleeved and sleeved at an end of the first connecting portion away from the gear portion of the motor sub-gear;

The electric clutch is coupled to the second connecting portion;

The electric clutch gear set further includes a retaining ring, the outer diameter of the retaining ring is larger than the outer diameter of the second connecting portion, and the retaining ring is disposed in the first positioning groove. One of the end faces of the retaining ring abuts against an end surface of the electric clutch.

As a further improvement of the embodiment of the present invention, a stopper groove is further formed on the second connecting portion;

The electric clutch is an annular cylinder, and an annular cylindrical inner wall surface extends at least one stop piece toward a central axis of the electric clutch;

The stop groove and the stop piece are in engagement with each other.

According to a further improvement of the embodiment of the present invention, the electric female gear includes: an electric female gear meshing portion that meshes with the driving source component, and an electric female gear connecting portion that is sleeved on the first connecting portion;

The cross section diameter of the electric female gear meshing portion is a circular ring shape, and a plurality of meshing teeth are disposed on an outer wall thereof;

The electric female gear connecting portion has a circular cross section, and is partially engaged and fixed on the inner wall of the electric female gear meshing portion, and partially protrudes outside the electric female gear meshing portion;

The electric female gear connecting portion is inserted into one end surface of the electric female gear meshing portion to provide a connecting card slot, and a limiting protrusion;

One side of the electric clutch plate is disposed on one side of the electric motor gear, and at least one connecting hook is disposed on the outer wall of the electric clutch plate.

The connecting card slot and the connecting hook are connected to each other;

The limiting protrusion and the limiting groove are matched with each other.

As a further improvement of the embodiment of the present invention, one of the two clutch gear sets is a mechanical clutch gear set;

The mechanical clutch gear set includes a mechanical female gear that meshes with the drive source member, a mechanical sub-gear that engages the pusher, and a mechanical clutch for selectively connecting the mechanical female gear and the mechanical sub-gear The mechanical clutch member includes: a mechanical clutch portion and a second elastic member that telescopes in the axial direction of the mechanical clutch portion;

One end of the second elastic member is detachably coupled to the mechanical clutch portion, and the other end is movably coupled to the mechanical female gear or the base;

In an initial state, the mechanical nut gear and the mechanical clutch part are mutually engaged and partially engaged with each other, and the mechanical clutch member and the mechanical sub-gear are separated from each other;

During the opening of the door body, the mechanical female gear and the mechanical clutch part are engaged with each other; the mechanical clutch and the mechanical sub-gear mesh with each other; and the second elastic element applies a mechanical coupling to the mechanical clutch a force toward the direction of the mechanical master gear;

After the door body is opened, the second elastic element applies a tight force to the mechanical clutch portion to drive the mechanical clutch portion to move toward the mechanical female gear to return to the initial state.

As a further improvement of the embodiment of the present invention, the mechanical clutch portion comprises: a mechanical clutch body in the shape of an annular cylinder;

The mechanical clutch body is disposed adjacent to an end surface of the mechanical sub-gear as a first annular step obliquely composed of a plurality of inclined steps;

The main body of the mechanical clutch portion is adjacent to one end surface of the mechanical female gear to open a first receiving groove having a circular cross section;

The bottom wall of the first accommodating groove is disposed as a second annular step slanting composed of a plurality of slanting steps;

The main body of the mechanical clutch portion is close to an end surface of the mechanical female gear, and at least two second limiting protrusions are evenly arranged near the outer wall side thereof;

Wherein the starting end and the ending end of each of the inclined stepped steps in each of the annular stepped slopes have a height difference in the axial direction of the mechanical clutch portion, and the starting ends of each inclined-shaped step are in the same plane, each The end of each step is in the same plane;

In the first annular stepped slope, each of the inclined steps is connected in a clockwise or counterclockwise direction;

In the second annular stepped slope, the connecting direction of each of the inclined steps is opposite to the connecting direction of the first annular stepped slope.

As a further improvement of the embodiment of the present invention, the mechanical sub-gear includes: a mechanical sub-gear connection portion, and a mechanical sub-gear engagement portion extending from the mechanical sub-gear connection portion;

a plurality of meshing teeth are disposed on an outer wall of the mechanical sub-gear engaging portion;

a second receiving groove having a circular circular cross section is formed on one end surface of the mechanical sub-gear connecting portion away from the mechanical sub-gear engaging portion;

The mechanical sub-gear connecting portion further includes: a first supporting rotating shaft extending perpendicularly outward from a center of the second receiving groove; and a plurality of inclined stepped steps formed on the bottom wall of the two receiving grooves a third annular step consisting of a slanting pleat;

The second elastic element is sleeved on the support shaft;

During the opening of the door, the first annular step obliquely engages with the third annular stepped slant to maintain the mechanical clutch and the mechanical sub-gear in a relatively static state.

As a further improvement of the embodiment of the present invention, the mechanical female gear has a circular cross-section, and the mechanical female gear has a plurality of arc-shaped receiving holes of the same structure at equal intervals through the two end faces thereof. The mechanical female gear is decomposed along its radial direction into an inner ring table and an outer ring table connected to each other;

The outer ring table is provided with a plurality of meshing teeth on an outer wall of one end of the mechanical sub-gear;

The second limiting protrusion is always movably disposed in the arc-shaped receiving hole;

An end surface of the inner ring table adjacent to the mechanical clutch member is disposed as a fourth annular step oblique pleat composed of a plurality of inclined drapes;

In the initial state, the second annular stepped slanted engagement with the fourth annular stepped slanted pleat.

In order to achieve one of the above objects, an embodiment of the present invention provides a refrigerator including: a cabinet having a compartment, a drawer disposed on the cabinet, and a door body opening or closing the compartment, the refrigerator An automatic door opening device as described above is also provided to open the drawer or door.

Compared with the prior art, the technical effect of the present invention is that the automatic door opening device of the present invention can automatically reset to the initial state after the pusher drives the door body to open by providing the first elastic member in the pushing member; further, By providing the clutch gear set, it is possible to avoid the noise generated by the driving member indirectly during the resetting process. At the same time, the automatic door opening device of the above structure does not need to be reset by the electric driving pusher after the door body is opened, and the automatic door opening device is lowered. The power consumption and component cost. At the same time, during the opening process of the door, the two sets of clutch gears are driven to rotate simultaneously by one motor to simultaneously open the two door bodies, thereby further reducing the power consumption and component cost of the automatic door opening device; User experience, convenient for user operation control.

DRAWINGS

1 is a schematic structural view of a door opening device of an automatic door opening device according to a first embodiment of the present invention;

2 is a schematic structural view of the automatic door opening device of the first embodiment of the present invention when the casing is removed;

3 is a schematic exploded view of an automatic door opening device according to a first embodiment of the present invention;

4 is a schematic structural view of an electric clutch device according to a first embodiment of the present invention;

Figure 5 is a schematic view of the exploded structure of Figure 4;

Figure 6 is a schematic exploded view of the other direction of Figure 4;

7 is a schematic structural view of a mechanical clutch device in an initial state in a second embodiment of the present invention;

8 is a schematic structural view of a mechanical clutch device in a process of opening a door body according to a second embodiment of the present invention;

9 is a schematic exploded view of a mechanical clutch device according to a second embodiment of the present invention;

Figure 10 is a schematic exploded view of the other direction of Figure 9;

Figure 11 is a schematic view showing the structure of the automatic door opening device of the third embodiment of the present invention when the base is removed;

Figure 12 is a schematic view showing the structure of the automatic door opening device of the fourth embodiment of the present invention when the base is removed;

Fig. 13 is a view showing the structure of the automatic door opening device according to the fifth embodiment of the present invention when the base is removed.

14 is a partial structural schematic view of a refrigerator to which the automatic opening device of at least one of the first embodiment and the second embodiment is applied;

15 is a partial structural schematic view of a refrigerator to which an automatic opening device of at least one of the third embodiment, the fourth embodiment, and the fifth embodiment is applied.

detailed description

The present invention will be described in detail below in conjunction with the embodiments shown in the drawings. However, the embodiments are not intended to limit the invention, and the structural, method, or functional changes made by those skilled in the art in accordance with the embodiments are included in the scope of the present invention.

1 to 3 show a preferred embodiment of the automatic door opening device 100 of the present invention. The automatic door opening device 100 of the present invention can be applied to any device that needs to be electrically opened, such as a refrigerator, and is installed on the door of the device. Or behind the door of the drawer, to open the door of the device or the door of the drawer on the device by pushing.

The automatic door opening device 100 includes a base, a driving source member 2 fixed in the base, a pushing member 4 partially movably disposed in the base for pushing the door body to be opened, and being disposed on the driving The transmission body between the source member 2 and the pushing member 4; in the embodiment of the present invention, the automatic door opening device 100 further includes a control panel 5 for receiving the door opening signal, thereby controlling The automatic door opening device operates, which will be described in detail below.

The transmission body includes: two portions selectively connected to each other, respectively a first portion and a second portion, the first portion is in contact with the driving source member 2, and the second portion is connected to the pushing member 4 Receiving the door opening signal, the first portion and the second portion of the transmission body are connected to a transmission state, and the driving source member 2 drives the transmission body to drive the pushing member 4 to the door body Directional movement to open the door body; after the door body is opened, the first portion and the second portion of the transmission body are disengaged from the transmission state, the first portion is kept in a stationary state, and the pushing member 4 is away from the door body Moving and driving the second portion of the transmission.

The base is a rectangular box-like structure including a case body 11 and a cover body 12 that are engaged with each other, and a receiving cavity (not shown) formed between the case body 11 and the cover body 12. The casing 11 has a bottom wall (not shown) facing the lid body 12 and a peripheral wall extending from the periphery of the bottom wall toward the lid body 12, respectively. The peripheral wall includes oppositely disposed front walls (not shown) and a rear wall, and opposite side walls (not shown). The front wall is formed with an opening 111 through which the pusher 4 projects.

In a preferred embodiment of the present invention, the opening 111 is disposed adjacent to any one of the side walls of the casing 11 to properly utilize the internal space of the base. An end of the two side walls of the casing 11 adjacent to the rear wall further extends outwardly with a screw fixing hole (not shown), and the cover body 12 is provided with a through hole corresponding to the screw fixing hole. The case 11 and the cover 12 are fixed together by screws (not shown) while the automatic opening device 100 of the present invention is fixed to the corresponding device.

The bottom wall of the casing 11 protrudes from a position adjacent to one of the two side walls with a longitudinally extending elongated guide groove 112. One end of the guide groove 112 is disposed corresponding to the opening 111; near the rear wall of the casing 11. A motor fixing groove 113 is disposed at a position, and a first rotating shaft 114, a second rotating shaft 115 and a third rotating shaft 116 are disposed on the same side of the guiding groove 112. The first rotating shaft 114, the second rotating shaft 115 and the third rotating shaft 116 are axially connected in a triangle shape, wherein the first rotating shaft 114 is adjacent to the motor fixing groove 113; the third rotating shaft 116 is adjacent to the elongated guiding groove 112. . A motor fixing block 117 is further disposed on the bottom wall of the casing 11, and the motor fixing block 117 cooperates with the motor fixing groove 113 to define the position of the driving source member 2; the bottom wall of the casing is also disposed near the rear wall. The bracket 118 cooperates with the guiding slot 112 to define the position of the pushing member 4.

In the present embodiment, the driving source member 2 includes a motor 21 fixedly disposed in the motor fixing groove 113 of the base, a worm 22 mounted on the motor fixing block 117 and disposed at the output end of the motor 21; The worm 22 meshes with the transmission body to drive the transmission body through the worm 22 when the motor 21 is in operation, thereby driving the pushing member 4 to open the door body.

In this embodiment, the pushing member 4 includes: a pushing rod 41 disposed in the elongated guiding groove 112 and disposed adjacent to the opening 111, and one end connected to the pushing rod 41 and the other end being close to The elongated guiding groove 112 is away from the first elastic member 42 disposed at one end of the opening 111; a side of the pushing rod 41 adjacent to the transmission body is provided with a linear rack to mesh with the transmission body 4; One end of the first elastic member 42 is fixed to the bracket 118. Of course, in other embodiments of the present invention, the other end of the first elastic member 42 may also be fixedly coupled to the elongated guide slot 112. Inside, we will not go into details here.

When the door opening signal is received, the pushing rod 41 drives the first elastic member 42 to move outside the base to open the door body, and the first elastic member 42 applies a force to the pushing rod 41. a force acting in the base; after the door body is opened, the first elastic member 42 applies a pressing force to the push rod 41 to drive the push rod to move into the base .

As shown in FIG. 3 to FIG. 6 , in the first embodiment of the present invention, the transmission body includes: an electric clutch gear set 31 that is sleeved on the first rotating shaft 114; the electric clutch gear set 31 includes an engagement. The electric motor gear 311 of the drive source member 2 engages the motor sub-gear 312 provided by the pusher 4, and an electric clutch member 313 for selectively connecting the electric motor gear 311 and the motor sub-gear 312.

Wherein, when the door opening signal is received, the driving source member 2 and the electric clutch member 313 are simultaneously powered on, and the electric female gear 311 and the electric sub-gear 312 can pass through the electric clutch 313. Detachably fixedly connected, the driving source member 2 drives the electric motor gear 311 to drive the motor sub-gear 312 in a transmission state to drive the push rod 41 to move outside the base to open the door body. And applying a force to the first elastic member 42 toward the base;

When the door body is opened, the driving source member 2 and the electric clutch member 313 simultaneously interrupt the power supply, and the electric motor gear 311 and the motor sub-gear 312 are disengaged from the transmission state by the electric clutch member 313. At this time, the electric female gear 311 is in a stationary state, and the first elastic member 42 applies a pressing force to the push rod 41 to move the push rod 41 into the base and drive the The rotor gear 312 is rotated in the reverse direction. Thus, since the electric female gear 311 is kept in a stationary state during the reverse rotation of the electric sub-gear 312, the meshing noise between the electric female gear 311 and the worm 22 is avoided.

In an embodiment of the present invention, the electric clutch member 313 includes: an electric clutch 3131 and an electric clutch plate 3132 disposed to abut each other; the electric clutch 3131 is detachably coupled to the electric sub-gear 312, the electric device The clutch plate 3132 is detachably connected to the electric female gear 311; when the door opening signal is received, the electric clutch 313 is powered on, and the electric clutch 3131 and the electric clutch plate 3132 are mutually adsorbed to make the The electric female gear 311 and the electric sub-gear 312 are detachably fixedly connected; after the door body is opened, the electric clutch member 313 interrupts power supply, and the electric clutch 3131 and the electric clutch plate 3132 are separated from each other to make The electric female gear 311 and the electric sub-gear 312 are disengaged from the transmission state. Further, in the process of driving the push rod 41 back into the base under the restoring force of the first elastic member 42, the motor sub-gear 312 rotates, and the electric female gear 311 is stationary. Thus, the electric female gear 311 and the worm 22 are avoided. Engagement noise occurs between them.

Preferably, the electric clutch 3131 is an annular cylinder, and at least one stop piece 31311 extends toward the central axis of the electric clutch 3131 on the inner wall surface of the annular cylinder. Preferably, the electric clutch plate 3132 is provided with at least one connecting hook 31321 on one side of the electric driving gear 311; at least one limiting groove 31322 is defined in the outer wall of the electric clutch plate 3132. In one embodiment of the present invention, the number of the positioning protrusions 31321 is three, wherein the point connecting lines form an equilateral triangle; the number of the limiting grooves 31322 is set to an even number, and is equidistantly distributed in the electric On the outer wall of the clutch piece 3132.

In a preferred embodiment of the present invention, the motor sub-gear 312, the electric motor gear 311, and the electric clutch 313 are coaxially disposed. The meshing radius of the electric motor gear 311 is greater than the meshing radius of the motor sub gear 312; the number of meshing teeth of the electric motor gear 311 is greater than the number of meshing teeth of the motor sub gear 312; thus, to reduce the driving source The input power of the component 2 reduces the power consumption and component cost of the automatic door opening device.

The rotor gear 312 includes a rotor gear meshing portion 3121, and a motor sub-gear connecting portion extending from the motor sub-gear engaging portion 3121. The motor sub-gear engaging portion 3121 is provided with a plurality of meshing teeth on an outer wall thereof; The motor sub-gear connecting portion includes: a first connecting portion 3122 extending from the motor sub-gear engaging portion; a second connecting portion 3123 extending from the first connecting portion 3122; the motor sub-gear engaging portion The first connecting portion 3122 and the second connecting portion 3123 are coaxially disposed; the radial diameter of the first connecting portion 3122 is larger than the radial diameter of the second connecting portion 3123; thus, the driving of the electric female gear is facilitated. 311. The position of the electric clutch 313.

The electric sub-gear engaging portion 3121 is engaged with the push rod 41; the electric main gear 311 is partially coupled to the first connecting portion 3122; the electric clutch piece 3132 is spliced and sleeved to the first portion A connecting portion 3122 is away from an end of the motor sub-gear engaging portion 3121. The electric clutch 3131 is coupled to the second connecting portion 3123.

In a preferred embodiment of the present invention, a first positioning groove 31231 is defined in an end of the second connecting portion 3123 away from the motor sub-gear engaging portion 3121. The electric clutch gear set 31 further includes a stopping ring 314. The retaining ring 314 is disposed in the first positioning groove 31231; one end surface of the stopping ring 314 abuts an end surface of the electric clutch 3131, and the outer diameter of the stopping ring 314 is larger than the outer ring The outer diameter of the second connecting portion 3122 is such that the axial position of the electric female gear 311 and the electric clutch 313 with respect to the electric sub-gear 312 is fixed.

In a preferred embodiment of the present invention, the second connecting portion 3123 further defines a stopping groove 31232. The stopping groove 31232 and the stopping piece 31311 are engaged with each other to fix the electric clutch 313. Relative to the radial position of the rotor gear 312.

In an embodiment of the present invention, the electric motor gear 311 includes: an electric female gear meshing portion 3111 that meshes with the driving source member 2, and an inner wall of the electric female gear meshing portion 3111 has a circular cross section; Attached to the inner wall of the electric female gear meshing portion 3111, partially protruding from the electric female gear connecting portion 3112 outside the electric female gear meshing portion 3111; the outer surface of the electric female gear meshing portion 3111 is provided with a plurality of meshing teeth; The electric female gear connecting portion 3112 is an annular cylindrical body that is sleeved on the first connecting portion 3122.

The electric female gear connecting portion 3112 is inserted into one end surface of the electric female gear meshing portion 3111, and a plurality of connecting card slots 31121 are disposed, and the connecting card slot 31121 is disposed near an inner side wall of the electric female gear connecting portion 3112; The number of the connection card slots 31121 is the same as the number of the connection hooks 31211, and the connection card slot 31121 and the connection hook 31312 are coupled to each other to detachably fix the electric clutch piece 3132 to the electric motor. On the gear 311.

The electric female gear connecting portion 3112 is inserted into one end surface of the electric female gear meshing portion 3111, and a plurality of limiting protrusions 31122 are further disposed. The limiting protrusions 31122 are adjacent to the outer wall of the electric female gear connecting portion 3112. The number of the limiting protrusions 31122 is the same as the number of the limiting recesses 31322, and the limiting protrusions 31122 and the limiting recesses 31322 are engaged with each other to fix the electric clutching piece 3132 relative to the electric motor. The radial position of the female gear 311.

In another preferred embodiment of the present invention, the transmission body further includes: at least one set of transmission wheels; the transmission wheel simultaneously meshes with the pushing member 4 and the clutch gear set 3; and/or the transmission wheel simultaneously Engagement with the clutch gear set 3 and the drive source member 2.

The transmission wheel has a plurality of structures, and each set of transmission wheels may include a plurality of sub-transmission wheels. In the specific example of the present invention, each set of transmission wheels includes two sub-transmission wheels, one of the two sub-transmission wheels and the pusher 4 Engaging, wherein the other is engaged with the clutch gear set 3; and/or one of the two sub-drive wheels meshes with the drive source member 2, wherein the other engages with the clutch gear set 3. The two sub-gear sets can be arranged coaxially or eccentrically. The number of meshing teeth of the two sub-gears can be the same or different. The sizes of the two sub-gears can be the same or different. In addition, the outer diameters of the two sub-gears can be round. The shape can also be shaped, and will not be described in detail here.

In a specific example of the present invention, the number of the transmission wheels is two groups, which are respectively a first group of transmission wheels 33 and a second group of transmission wheels 34; the first group of transmission wheels 33 and the second group of transmission wheels 34 are respectively sleeved on the On the second rotating shaft 115 and the third rotating shaft 116, the first set of transmission wheels 33 includes a first sub-transmission wheel and a second sub-transmission wheel disposed coaxially; the second group of transmission wheels 34 includes a third sub-transmission coaxially disposed. a wheel and a fourth sub-transmission wheel; wherein the rotor sub-gear 312 is meshed with the first sub-transmission wheel, the second sub-transmission wheel is meshed with the third sub-transmission wheel, and the fourth sub-transmission wheel is meshed with the push rod 41; The number of meshing teeth of one sub-drive wheel is greater than the number of meshing teeth of the second sub-transmission wheel; the number of meshing teeth of the third sub-transmission wheel is greater than the number of meshing teeth of the fourth sub-transmission wheel; thus, the drive source member 2 is lowered The input power reduces the power consumption and component cost of the automatic door opening device.

According to the automatic door opening device of the first embodiment of the present invention, by providing the first elastic member in the pushing member, the driving member can be automatically reset to the initial state after the driving member is opened; further, by providing the electric clutch gear set, it can be avoided. During the resetting process, the pushing member indirectly generates noise to the driving source member. At the same time, the automatic door opening device of the above structure does not need to be reset by the electric driving pusher after the door body is opened, thereby reducing the power consumption and component cost of the automatic door opening device.

7 to 10, an automatic door opening device according to a second embodiment of the present invention, the automatic door opening device of the second embodiment is similar to the automatic door opening device of the first embodiment, and the difference is that the transmission body is The electric clutch gear set 31 is disposed as a mechanical clutch gear set 32, and the mechanical clutch gear set 32 is movably sleeved on the first rotating shaft 114.

The mechanical clutch gear set 32 includes: a mechanical female gear 321 that engages the drive source member 2, a mechanical sub-gear 322 that engages the pusher 4, and a selective connection of the mechanical female gear 321 and the Mechanical clutch 323 of mechanical sub-gear 322.

Wherein, when the door opening signal is received, the driving source member 2 is powered on, and the mechanical main gear 321 and the mechanical sub-gear 322 are detachably fixedly connected by the mechanical clutch member 323, the driving The source member 2 drives the mechanical female gear 321 to drive the mechanical sub-gear 322 in a transmission state to drive the push rod 41 to move toward the door body to open the door body, and to the first elastic element. 42 applying a force toward the distal end of the door;

When the door body is opened, the driving source member 2 interrupts the power supply, and the mechanical female gear 321 and the mechanical sub-gear 322 are disengaged from the transmission state by the mechanical clutch member 323. At this time, the mechanical female gear The 321 is in a static state, and the first elastic member 42 applies a pressing force to the push rod 41 to move the push rod 41 toward the distal end of the door body, and drives the mechanical sub-gear 322 to reverse. Rotate. As such, since the mechanical master gear 321 remains in a stationary state during the reverse rotation of the mechanical sub-gear 322, engagement noise between the mechanical female gear 321 and the worm 22 is avoided.

In one embodiment of the invention, the mechanical master gear 321 , the mechanical sub-gear 322 , and the mechanical clutch member 323 are coaxially disposed.

The mechanical clutch member 323 includes: a mechanical clutch portion 3231 and a second elastic element 3232 that is telescopically extended in the axial direction of the mechanical clutch portion 3231; one end of the second elastic member 3232 is detachably coupled to the mechanical clutch The other end is movably connected to the mechanical main gear 321 or the base; in an initial state, the mechanical main gear 321 and the mechanical clutch 323 are partially engaged with each other and partially engaged with each other, the mechanical clutch The mechanical member 321 is separated from the mechanical sub-gear 322; the mechanical main gear 321 and the mechanical clutch 323 are partially engaged with each other; the mechanical clutch 323 and the mechanical sub-gear 322 are mutually coupled; Engaging; the second elastic member 3232 applies a force to the mechanical clutch portion 3231 toward the mechanical female gear 321; after the door body is opened, the second elastic member 3232 is coupled to the mechanical clutch The portion 3231 applies a tightening force to move the mechanical clutch portion 3231 in the direction of the mechanical female gear 321 to return to the initial state.

Preferably, the mechanical clutch portion 3231 includes: a mechanical clutch portion body in the shape of an annular cylinder; an end surface of the mechanical clutch portion main body adjacent to the mechanical sub-gear 322 is disposed to have a plurality of structurally identical slanted drapes a first annular stepped slanted cloak 32311; the mechanical clutch body is adjacent to one end surface of the mechanical female gear 321 to open a first accommodating groove (not shown) having a circular cross section; The bottom wall of the first accommodating groove is disposed as a second annular step slanting cloak 32312 composed of a plurality of slanting steps; wherein the starting end and the end of each slanting step in each of the annular stepped steps The end has a height difference in the axial direction of the mechanical clutch portion 3231, and the starting ends of each inclined-shaped step are in the same plane, and the end ends of each step are in the same plane; in a specific embodiment of the present invention, In the first annular stepped slope 32311, each of the inclined stepped steps is connected clockwise or counterclockwise; in the second annular stepped slope 32312, the connecting direction of each obliquely shaped step and the first annular step Slope 32311 Connecting opposite directions.

The main body of the mechanical clutch portion is adjacent to an end surface of the mechanical main gear 321 , and at least two second limiting protrusions 32313 are evenly arranged adjacent to the outer wall side thereof. Preferably, the mechanical clutch portion 3231 is axially opened. One end of the second elastic member 3232 is engaged in the through hole 32314 through the through hole 32314.

In a specific embodiment of the present invention, the number of the first annular stepped slanting 32311 and the second annular stepped slanting sliding 32312 may be the same or different; the first annular stepped slanting slanting 32311, the second ring The number of the inclined steps in the stepped slanting drapes 32312 is at least two, and in this example, the number of the slanted drapes in the first annular stepped slanting 32311 and the second annular stepped slanting 32312 is the same. All of them are four, and each arc-shaped corner occupied by the inclined step is 90 degrees.

Preferably, the arc angle of the arc between the adjacent two second stepped protrusions 32313 is less than or equal to the arc center angle occupied by each of the second stepped slanted drapes 32312; In an embodiment of the invention, the number of the second limiting protrusions 32313 is set to three, and the arc angle of the arc between the adjacent two second limiting protrusions 32313 is equal to the second annular step. The angle of the arc center occupied by each of the inclined drapes in the slanted draping 32312 is 90 degrees.

The mechanical sub-gear 322 includes: a mechanical sub-gear connecting portion 3222, and a mechanical sub-gear engaging portion 3221 extending from the mechanical sub-gear connecting portion 3222; a plurality of meshing teeth are disposed on an outer wall of the mechanical sub-gear engaging portion 3221; The number of meshing teeth of the gear 321 is larger than the number of meshing teeth of the mechanical sub-gear 322; thus, to reduce the input power of the drive source member 2, the power consumption and component cost of the automatic door opening device are reduced.

The mechanical sub-gear connecting portion 3222 is disposed away from the one end surface of the mechanical sub-gear engaging portion 3221 and has a second receiving groove (not shown) having a circular cross section; the mechanical sub-gear connecting portion 3222 includes: a first supporting rotating shaft 32221 extending perpendicularly outward from a center of the second receiving groove; and a third annular step formed on the bottom wall of the first receiving groove and composed of a plurality of inclined steps The second elastic component sleeve 3232 is attached to the first supporting rotating shaft 32211; wherein, during the opening of the door body, the first annular step obliquely facing 32311 and the third annular stepped obliquely facing 32222 Engaging with each other to maintain the mechanical clutch member 323 and the mechanical sub-gear 322 in a relatively stationary state.

The mechanical sub-gear connecting portion 3222 further includes: a second supporting rotating shaft 32223 extending from the first supporting rotating shaft 32221 toward the mechanical female gear 321 , and the second supporting rotating shaft 32223 and the first rotating shaft 114 cooperate with each other to The mechanical clutch gear set 32 provides a rotating shaft. In this embodiment, the second supporting rotating shaft 32223 is inserted into the first rotating shaft 114, and details are not described herein.

The mechanical main gear 321 has a circular cross-sectional shape. The mechanical main gear 321 has a plurality of arc-shaped receiving holes 3213 having the same structure at equal intervals through the two end faces thereof to connect the mechanical female gear 321 Decomposed along the radial direction thereof into an interconnected inner ring table 3212 and an outer ring table 3211; the outer ring table 3211 is provided with a plurality of meshing teeth on an outer wall of one end of the mechanical sub-gear 322; the second limit protrusion 32313 is always movably disposed in the arc-shaped accommodating hole 3213; and during the initial rotation of the mechanical female gear 321 , the circumferential movement is performed with respect to the arc-shaped accommodating hole 3213, and at the same time, the arc-shaped accommodating hole is formed along the arc The axial movement of the 3213, the working process of which will be described in detail below.

An end surface of the inner ring table 3212 adjacent to the mechanical clutch member 323 is disposed as a fourth annular stepped slanted slab 32121 composed of a plurality of slanted drapes; in the initial state, the second annular step slanted The 32312 is in mesh with the fourth annular stepped slant 32121.

The inner ring table 3212 is away from an end surface of the mechanical clutch member 323, and extends along the inner wall surface side thereof to form an annular joint portion 3214; the joint portion 3214 also cooperates with the first rotating shaft 114 to serve the machine. The clutch gear set 32 provides a rotating shaft. In the present embodiment, the first rotating shaft 114 is inserted into the annular joint portion 3214, and details are not described herein.

In a specific embodiment of the present invention, the fourth annular stepped slanting 32121 is the same as the second annular stepped slanting shawl 32212, and the connecting direction is opposite, so that in the initial state, the fourth ring is maintained. The stepped slanting draping 32121 is engaged with the second annular stepped slanting shawt 32312; in this specific example, the arcing angle occupied by each of the slanted draped steps of the fourth annular stepped slanted slab 32121 is also 90 degrees.

Preferably, the number of the arc-shaped accommodating holes 3213 is equal to the number of the second limiting protrusions 32313. In the embodiment of the present invention, the number of the arc-shaped accommodating holes 3213 is three, and each of the arc-shaped accommodating holes 3213 is The occupied arc angle is equal to the sum of the arc angle occupied by any one of the second limiting protrusions 32313 and the arcing angle occupied by any one of the second annular stepped drapes 32312.

In the embodiment of the present invention, in the initial state, the mechanical female gear 321 and the mechanical clutch member 323 are in mesh with each other, wherein the second annular stepped slope 32312 and the four annular stepped slanted 32121 are in mesh with each other. The second limiting protrusion 32313 abuts against one of the side walls of the arc-shaped receiving hole 3213 corresponding thereto; the mechanical clutch member 323 and the mechanical sub-gear 322 are separated from each other.

When the door opening signal is received, the drive source member 2 is powered on, and the drive source member 2 drives the mechanical female gear 321 to rotate, before the first rotation of the female gear 321 to 90 degrees, due to the second The annular stepped slope 32312 and the fourth annular stepped slanted 32121 are each composed of a slanted stepped step having an axial height difference, and the second annular stepped slope 32312 and the four annular stepped slanted 32121 The setting direction is reversed. Thus, during the rotation of the electric female gear 311 to 90 degrees, the mechanical clutch portion 3231 in the mechanical clutch member 323 is uniformly pushed in the axial direction thereof toward the mechanical sub-gear 322, so that The first annular stepped slanting 32311 of the mechanical clutch member 323 and the third annular stepped slanting slant 32222 of the mechanical sub-gear 322 are gradually engaged; meanwhile, the second elastic member 3232 is opposite to the mechanical clutching portion 3231 Applying a force toward the mechanical female gear 321; when the female gear 321 is first rotated to 90 degrees, the second limiting projection 32313 abuts against the corresponding curved receiving hole 3213 One side wall; the machine The first annular stepped slanting 32311 of the fitting 323 and the third annular stepped slanting 32222 of the mechanical sub-gear 322 are fully engaged; and after the primary rotation of the female gear 321 to 90 degrees, the mechanical element is made The gear 322 is in a transmission state with the mechanical nut gear 321 through the mechanical clutch portion 323; to drive the push rod 41 to move toward the door body to open the door body, and to the first elastic member 42 A force is applied toward the distal end of the door. When the door body is opened, the driving source member 2 interrupts the power supply, and the first elastic member 42 applies a pressing force to the pushing rod 41 to move the pushing rod 41 into the base. And driving the mechanical sub-gear 322 to rotate in the reverse direction; when the mechanical sub-gear 322 rotates in the reverse direction, the mechanical clutch member 323 is driven to rotate in the opposite direction, under the tension of the second elastic member 3232. The second annular step slope 32312 is gradually engaged with the four-ring stepped slant 32121, and when the mechanical sub-gear 322 is first rotated to 90 degrees, the mechanical clutch gear set 32 is restored to the initial connected state.

According to the automatic door opening device of the second embodiment of the present invention, by providing the first elastic member in the pushing member, the driving member can be automatically reset to the initial state after the driving member is opened; further, by providing the mechanical clutch gear set, it can be avoided. During the resetting process, the pushing member indirectly generates noise to the driving source member. At the same time, the automatic door opening device of the above structure does not need to be reset by the electric driving pusher after the door body is opened, thereby reducing the power consumption and component cost of the automatic door opening device.

As shown in FIG. 11, the automatic door opening device of the third embodiment of the present invention is configured to simultaneously open two door bodies, thereby correspondingly setting two of the pushes with respect to the automatic door opening device of the first embodiment or the second embodiment. Item 4.

Referring to the first embodiment or the second embodiment, the front wall of the base is formed with two openings (not shown) for projecting the two pushers 4, and the two openings are respectively disposed adjacent to the two side walls. The bottom wall respectively protrudes from the two side wall positions with a longitudinally extending elongated guide groove, and one end of each of the two guiding grooves is respectively disposed corresponding to two openings; the motor fixing groove is disposed at two places On the axis of symmetry between the guide grooves, the first rotating shaft, the second rotating shaft and the third rotating shaft are respectively two, and are symmetrically distributed with the axis of symmetry between the guiding grooves.

In this embodiment, the structure of the driving source member is completely the same as that of the driving source member of the first embodiment or the second embodiment, and the difference is only in the arrangement position thereof. The description of the pedestal can clearly show the implementation. In the mode, the setting position of the source member is driven, so the description will not be repeated.

In this embodiment, the pushing member is also identical in structure to the pushing member 4 of the first embodiment or the second embodiment, and the difference is only in the setting position thereof, and the difference in the number of settings, by the description of the base, It can be clearly seen that the two pushing members 4 in the embodiment are symmetrically disposed adjacent to the mutually corresponding two side walls of the base; two sets of electric clutch gear sets are symmetrically disposed between the two pushing members 4, The driving source member 2 is disposed between the two sets of electric clutch gear sets, and details are not described herein again.

In this embodiment, the transmission body includes: two clutch gear sets respectively meshing with the two pushing members; each of the clutch gear sets includes: two portions selectively connected to each other, respectively being the first portion and the second portion, The first portion is in contact with the driving source member, the second portion is in contact with the pushing member; and when receiving the door opening signal, the first portion and the second portion of one of the at least two sets of clutch gear sets Connected to a transmission state, the drive source member drives a clutch gear set that is currently in a transmission state to drive the pusher corresponding to the current clutch gear set to move outside the base to open the door; The first elastic element applies a force toward the distal end of the door body; after the door body is opened, the first part and the second part of the clutch gear set that currently drives the door body are released from the transmission state, the current clutch gear The first portion of the set remains stationary, the first resilient element applying a tension to the push rod to move the push rod into the base and drive it Corresponding movement of the second portion of the clutch gear set.

In a specific example of the present invention, in the automatic door opening device of the third embodiment, one of the two clutch gear sets is the electric clutch gear set 31 of the first embodiment; the other group is the second The mechanical clutch gear set 32 of the embodiment.

In practical applications, the directions of the meshing teeth of the two clutch gear sets are reversed to drive the two clutch gear sets simultaneously after the drive source member 2 is powered on, thereby simultaneously pushing the two pushers 4 simultaneously to open two The door body will not be described in detail here.

Of course, in other embodiments of the present invention, if the meshing teeth of the two clutch gear sets are set to be the same, the two door bodies can be opened sequentially by the forward rotation and the reverse rotation control of one drive source member; The meshing teeth of the electric master gear are arranged, and the two door bodies are opened and controlled by a driving source member, and will not be described in detail herein.

As shown in FIG. 12, in the automatic door opening device of the fourth embodiment of the present invention, the automatic door opening device of the fourth embodiment is similar in structure to the automatic door opening device of the third embodiment, and is used for simultaneously opening two door bodies. The automatic door opening device of the fourth embodiment is different from the automatic door opening device of the third embodiment in that the two clutch gear sets have the same structure, which are all the electric clutch gear sets in the first embodiment of the present invention; The directions of the meshing teeth of the two electric clutch gear sets are reversed to drive the two electric clutch gear sets simultaneously after the driving source member 2 is powered on, thereby simultaneously pushing the two pushing members 4 simultaneously to open the two doors. Body, we will not go into details here.

Of course, in other embodiments of the present invention, if the meshing teeth of the two electric clutch gear sets are set to be the same, the two door bodies can be opened sequentially by the forward rotation and the reverse rotation control of one driving source member; The meshing teeth of the electric female gear are arranged, and the two door bodies are opened and controlled by a driving source member, and will not be described in detail herein.

As shown in FIG. 13 , the automatic door opening device of the fifth embodiment of the present invention is similar to the automatic door opening device of the third embodiment, and is configured to simultaneously open two door bodies. The automatic door opening device of the fifth embodiment is different from the automatic door opening device of the third embodiment in that the two clutch gear sets have the same structure, which are all the mechanical clutch gear sets in the second embodiment of the present invention; In practical applications, the directions of the meshing teeth of the two mechanical clutch gear sets are set to be opposite, so that after the drive source member 2 is powered on, the two electric clutch gear sets can be simultaneously driven, thereby simultaneously pushing the two pushers 4 simultaneously. Open the two doors and do not go into details here.

Of course, in other embodiments of the present invention, if the meshing teeth of the two electric clutch gear sets are set to be the same, the two door bodies can be opened sequentially by the forward rotation and the reverse rotation control of one driving source member; The meshing teeth of the electric female gear are arranged, and the two door bodies are opened and controlled by a driving source member, and will not be described in detail herein.

The automatic door opening devices of the third embodiment, the fourth embodiment, and the fifth embodiment of the present invention may be provided corresponding to one door body, and will not be described in detail herein.

The automatic door opening device of the third embodiment, the fourth embodiment, and the fifth embodiment of the present invention can automatically reset to the initial state after the pusher drive door is opened by providing the first elastic member in the pusher; By providing the clutch gear set, it is possible to avoid the noise generated by the pusher member indirectly during the resetting process, and the automatic door opening device of the above structure does not need to be reset by the electric drive pusher after the door body is opened, thereby reducing the automatic door opening device. Power consumption and component cost; at the same time, the automatic door opening device of the third embodiment, the fourth embodiment, and the fifth embodiment of the present invention can also be changed according to the direction, position, and number of the meshing teeth in each of the clutch gear sets. The user needs to specify the opening sequence of the door body; in the specific embodiment of the present invention, during the opening process of the door body, the two sets of clutch gear sets are driven to rotate simultaneously by one motor to simultaneously open the two door bodies, thereby further reducing the automatic door opening device. Power consumption and component cost.

In addition, as shown in FIGS. 14 and 15, the present invention can also design a refrigerator 500 including a cabinet 51 having a compartment, a drawer disposed on the cabinet 51, and a door body for opening or closing the compartment. The automatic door opening device 100 described in any of the above embodiments. The automatic opening device 100 for opening the door body is disposed at the top of the box 51 or the front side of the intermediate partition; the automatic opening device 100 for opening the drawer may be disposed in the compartment behind the drawer door body, or The object of the present invention can be achieved by being disposed at the rear side position of the drawer or the like.

It should be understood that, although the description is described in terms of embodiments, the embodiments are not intended to be construed as a single. The technical solutions in the embodiments may also be combined as appropriate to form other embodiments that can be understood by those skilled in the art.

The series of detailed descriptions set forth above are merely illustrative of the possible embodiments of the present invention, and are not intended to limit the scope of the present invention. Changes are intended to be included within the scope of the invention.

Claims (10)

1. An automatic door opening device for automatically opening a door body of a refrigerator; comprising: a base, a driving source member fixed in the base, two pushing members for pushing the door body to open, and for engaging a drive body of the drive source member and the two pushers;

   It is characterized by:

   Each of the pushing members includes: a pushing rod and a first elastic member connected to the pushing rod and disposed away from the door body;

   The transmission body includes: two sets of clutch gear sets respectively meshing with the two pushing members;

   Each of the clutch gear sets includes: two portions selectively connected to each other, respectively a first portion and a second portion, the first portion being in contact with the drive source member, and the second portion being in contact with the pusher;

   Receiving the door opening signal, the first portion and the second portion of one of the at least two sets of clutch gears are connected to a transmission state, and the driving source member drives the clutch gear set currently in the transmission state to drive the current clutch gear The corresponding pushing member of the group moves outside the base to open the door body; and applies a force to the first elastic member toward the base;

   After the door body is opened, the first part and the second part of the clutch gear set that is currently driven to open the door body are separated from the transmission state, and the first part of the current clutch gear set is kept in a static state, and the first elastic element pair is The push rod applies a tension to move the push rod into the base and drive the movement of its corresponding second portion of the clutch gear set.
2. The automatic door opening device according to claim 1, wherein:

   One of the two clutch gear sets is an electric clutch gear set;

   The electric clutch gear set includes an electric female gear that meshes with the drive source member, a rotor sub-gear provided to engage one of the pushers, and a terminal for selectively connecting the electric female gear and the motor sub-gear Electric clutch

   The electric clutch member includes: an electric clutch and an electric clutch plate that are disposed to abut each other; the electric clutch is detachably coupled to the electric sub-gear, and the electric clutch plate is detachably coupled to the electric female gear;

   Receiving the door opening signal, the electric clutch and the electric clutch plate are mutually attracted to detachably fix the electric female gear and the electric sub gear;

   After the door body is opened, the electric clutch and the electric clutch plate are separated from each other to disengage the electric female gear and the electric sub-gear from the transmission state.
3. The automatic door opening device according to claim 2, wherein:

   The rotor gear includes: a rotor gear engagement portion, and a rotor gear connection extending from the rotor gear engagement portion;

   a plurality of meshing teeth are disposed on an outer wall of the meshing gear meshing portion;

   The rotor gear connection portion includes: a first connection portion extending from the motor sub-gear engagement portion; a second connection portion extending from the first connection portion; the second connection portion being remote from the electric One end of the sub-gear engaging portion is provided with a first positioning groove;

   The motor sub-gear engaging portion, the first connecting portion and the second connecting portion are coaxially disposed; the radial diameter of the first connecting portion is larger than a radial diameter of the second connecting portion; the motor sub-gear meshing portion Engaging the push rod setting;

   The electric female gear portion is merged and sleeved to the first connecting portion;

   The electric clutch piece is sleeved and sleeved at an end of the first connecting portion away from the gear portion of the motor sub-gear;

   The electric clutch is coupled to the second connecting portion;

   The electric clutch gear set further includes a retaining ring, the outer diameter of the retaining ring is larger than the outer diameter of the second connecting portion, and the retaining ring is disposed in the first positioning groove. One of the end faces of the retaining ring abuts against an end surface of the electric clutch.
4. The automatic door opening device according to claim 3, wherein a stopper groove is further formed on the second connecting portion;

   The electric clutch is an annular cylinder, and an annular cylindrical inner wall surface extends at least one stop piece toward a central axis of the electric clutch;

   The stop groove and the stop piece are in engagement with each other.
5. The automatic door opening device according to claim 3, wherein the electric female gear comprises: an electric female gear meshing portion that meshes with the driving source member, and a sleeve sleeved on the first connecting portion Electric female gear connection;

   The cross section diameter of the electric female gear meshing portion is a circular ring shape, and a plurality of meshing teeth are disposed on an outer wall thereof;

   The electric female gear connecting portion has a circular cross section, and is partially engaged and fixed on the inner wall of the electric female gear meshing portion, and partially protrudes outside the electric female gear meshing portion;

   The electric female gear connecting portion is inserted into one end surface of the electric female gear meshing portion to provide a connecting card slot, and a limiting protrusion;

   One side of the electric clutch plate is disposed on one side of the electric motor gear, and at least one connecting hook is disposed on the outer wall of the electric clutch plate.

   The connecting card slot and the connecting hook are connected to each other;

   The limiting protrusion and the limiting groove are matched with each other.
6. The automatic door opening device according to claim 1, wherein:

   One of the two clutch gear sets is a mechanical clutch gear set;

   The mechanical clutch gear set includes a mechanical female gear that meshes with the drive source member, a mechanical sub-gear that engages the pusher, and a mechanical clutch for selectively connecting the mechanical female gear and the mechanical sub-gear The mechanical clutch member includes: a mechanical clutch portion and a second elastic member that telescopes in the axial direction of the mechanical clutch portion;

   One end of the second elastic member is detachably coupled to the mechanical clutch portion, and the other end is movably coupled to the mechanical female gear or the base;

   In an initial state, the mechanical nut gear and the mechanical clutch part are mutually engaged and partially engaged with each other, and the mechanical clutch member and the mechanical sub-gear are separated from each other;

   During the opening of the door body, the mechanical female gear and the mechanical clutch part are engaged with each other; the mechanical clutch and the mechanical sub-gear mesh with each other; and the second elastic element applies a mechanical coupling to the mechanical clutch a force toward the direction of the mechanical master gear;

   After the door body is opened, the second elastic element applies a tight force to the mechanical clutch portion to drive the mechanical clutch portion to move toward the mechanical female gear to return to the initial state.
7. The automatic door opening device according to claim 6, wherein:

   The mechanical clutch portion includes: a mechanical clutch body in the shape of an annular cylinder;

   The mechanical clutch body is disposed adjacent to an end surface of the mechanical sub-gear as a first annular step obliquely composed of a plurality of inclined steps;

   The main body of the mechanical clutch portion is adjacent to one end surface of the mechanical female gear to open a first receiving groove having a circular cross section;

   The bottom wall of the first accommodating groove is disposed as a second annular step slanting composed of a plurality of slanting steps;

   The main body of the mechanical clutch portion is close to an end surface of the mechanical female gear, and at least two second limiting protrusions are evenly arranged near the outer wall side thereof;

   Wherein the starting end and the ending end of each of the inclined stepped steps in each of the annular stepped slopes have a height difference in the axial direction of the mechanical clutch portion, and the starting ends of each inclined-shaped step are in the same plane, each The end of each step is in the same plane;

   In the first annular stepped slope, each of the inclined steps is connected in a clockwise or counterclockwise direction;

   In the second annular stepped slope, the connecting direction of each of the inclined steps is opposite to the connecting direction of the first annular stepped slope.
8. The automatic door opening device according to claim 7, wherein:

   The mechanical sub-gear includes: a mechanical sub-gear connection portion, and a mechanical sub-gear engagement portion extending from the mechanical sub-gear connection portion;

   a plurality of meshing teeth are disposed on an outer wall of the mechanical sub-gear engaging portion;

   a second receiving groove having a circular circular cross section is formed on one end surface of the mechanical sub-gear connecting portion away from the mechanical sub-gear engaging portion;

   The mechanical sub-gear connecting portion further includes: a first supporting rotating shaft extending perpendicularly outward from a center of the second receiving groove; and a plurality of inclined stepped steps formed on the bottom wall of the two receiving grooves a third annular step consisting of a slanting pleat;

   The second elastic element is sleeved on the support shaft;

   During the opening of the door, the first annular step obliquely engages with the third annular stepped slant to maintain the mechanical clutch and the mechanical sub-gear in a relatively static state.
9. The automatic door opening device according to claim 7, wherein:

   The mechanical female gear has a circular cross-section, and the mechanical female gear has a plurality of arc-shaped receiving holes of the same structure at equal intervals through the two end faces thereof to rotate the mechanical female gear along the radial direction thereof. Decomposed into interconnected inner ring and outer ring tables;

   The outer ring table is provided with a plurality of meshing teeth on an outer wall of one end of the mechanical sub-gear;

   The second limiting protrusion is always movably disposed in the arc-shaped receiving hole;

   An end surface of the inner ring table adjacent to the mechanical clutch member is disposed as a fourth annular step oblique pleat composed of a plurality of inclined drapes;

   In the initial state, the second annular stepped slanted engagement with the fourth annular stepped slanted pleat.
10. A refrigerator comprising a cabinet having a compartment, a drawer disposed on the cabinet, and a door body opening or closing the compartment, wherein the refrigerator is provided with a handle to open the drawer or the door body according to the claims The automatic door opening device described in 1.

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