CN113154772A

CN113154772A - Refrigerator and automatic door closing method thereof

Info

Publication number: CN113154772A
Application number: CN202010115298.6A
Authority: CN
Inventors: 李爱华; 吴侠儒
Original assignee: Nanjing Zhongjingke Electronic Technology Co ltd
Current assignee: Nanjing Zhongjingke Electronic Technology Co ltd
Priority date: 2020-01-22
Filing date: 2020-02-25
Publication date: 2021-07-23
Also published as: CN212253341U

Abstract

The invention belongs to the technical field of refrigerators, and particularly discloses a refrigerator and an automatic door closing method of the refrigerator, wherein the refrigerator comprises a main cabinet body, door bodies are hinged to two opposite sides of the main cabinet body, the inner side of one door body is pivoted with a turning beam, one of the main cabinet body and the turning beam is provided with a guide bulge, the other of the main cabinet body and the turning beam is provided with a guide groove, the guide bulge is in sliding fit with the guide groove, the refrigerator further comprises a turning driving mechanism, and the turning driving mechanism comprises: the deflector rod is convexly arranged on the turnover beam; and the driving unit comprises a driving transmission assembly and a rotating arm, and the driving transmission assembly is configured to drive the rotating arm to horizontally rotate so as to toggle the deflector rod, so that the overturning beam overturns under the guidance of the guide protrusion and the guide groove. The automatic door closing method of the refrigerator is applied to the refrigerator. The refrigerator and the automatic door closing method for the refrigerator provided by the invention can realize automatic turnover of the turnover beam, realize automatic door opening and closing actions of a double-door refrigerator, and can be compatible with manual operation of the refrigerator, thereby improving the use experience of consumers.

Description

Refrigerator and automatic door closing method thereof

The invention discloses a refrigerator and an automatic door closing method thereof, wherein the application number is 202010074187.5, the application date is 2020, 01 and 22, and the invention is named as the priority of a prior application text of Najing Bingke electronic technology Co.

Technical Field

The invention relates to the technical field of refrigerators, in particular to a refrigerator and an automatic door closing method of the refrigerator.

Background

The refrigerator is a common household appliance for food preservation, and as the demand of people for the capacity of the refrigerator is increased, the large-capacity refrigerator is more and more favored by consumers. The existing large-capacity refrigerator is designed in a side-by-side mode, in order to guarantee the sealing performance of the side-by-side refrigerator when the door is closed, the inner side of one door body is hinged with a turnover beam capable of turning over relative to the door body, and after the door body is closed, the turnover beam is located between the gaps of the two door bodies, so that the problem that cold air leaks from the gap between the two door bodies of the side-by-side refrigerator is avoided.

In the refrigerator provided by the prior art, in order to realize the turnover of the turnover beam in the process of opening and closing the door of the refrigerator, the top of the turnover beam is provided with a guide lug, the inner side surface of the top of the refrigerator body is provided with a guide groove, and when the door body is closed, the guide lug enters the guide groove and slides along the groove wall of the guide groove, so that the turnover beam is driven to turn to a closed state; when the door body is opened, under the action of external force, the guide convex block slides to the exit guide groove along the groove wall of the guide groove, and the overturning beam is driven to overturn to an open state.

For the refrigerator which adopts the ejection mechanism and the rotating mechanism to realize the automatic door opening and closing, the ejection mechanism overcomes the suction force of the door seal and has enough thrust to push the overturning beam on the door body to complete the overturning when the door is opened in the automatic door opening process of the refrigerator. However, in the automatic door closing process of the refrigerator, the door body rotates only by the torque provided by the rotating mechanism, and the driving torque of the door body is smaller than the rotating torque generated in the manual door closing process, so that the door body is difficult to generate enough thrust to push the turnover beam to realize turnover in the door closing process, the automatic door closing process is hindered, and the automatic door opening and closing action of the refrigerator with the turnover beam cannot be realized.

Disclosure of Invention

The invention aims to provide a refrigerator, which realizes the automatic turnover of a turnover beam in the door closing process of the refrigerator, so that the refrigerator with the turnover beam can realize the automatic door opening and closing action.

The invention also aims to provide an automatic door closing method for the refrigerator, which realizes the automatic turnover of the turnover beam and the automatic door closing of the refrigerator in the door closing process of the refrigerator and improves the use experience of consumers.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a refrigerator, includes the main cabinet body, the relative both sides of the main cabinet body all articulate there is a body, one of them the inboard pin joint of the body has the upset roof beam, the main cabinet body with one in the upset roof beam is provided with the direction arch, the main cabinet body with another in the upset roof beam is provided with the guide way, the direction arch with guide way sliding fit still includes upset actuating mechanism, upset actuating mechanism includes:

the deflector rod is convexly arranged on the overturning beam;

and the driving unit comprises a driving transmission assembly and a rotating arm, and the driving transmission assembly is configured to drive the rotating arm to horizontally rotate so as to toggle the shifting lever, so that the overturning beam overturns under the guidance of the guide protrusion and the guide groove.

As a preferable mode of the refrigerator, when the driving unit is stopped at the preset initial position, a projection of the rotation arm on a horizontal plane is located outside a projection of the guide groove on the horizontal plane.

As a preferable technical solution of the refrigerator, the rotating arm includes an axis connecting portion and extending arm portions extending radially outward along the axis connecting portion, the axis connecting portion is vertically disposed and is in transmission connection with the driving transmission assembly, at least two of the extending arm portions are disposed at regular intervals along a circumferential direction of the axis connecting portion, and when the guide protrusion extends into the guide groove, the shift lever is located between two adjacent extending arm portions.

As a preferable technical solution of a refrigerator, the driving transmission assembly includes:

a drive motor;

the transmission assembly comprises a driving shaft which is vertically arranged, an output shaft of the driving motor is connected with the driving shaft, and the rotating arm is sleeved on the driving shaft.

As a preferred technical scheme of the refrigerator, a torsion spring is sleeved on the driving shaft, one end of the torsion spring is fixed relative to the rotating arm, and the other end of the torsion spring is fixed relative to the driving shaft.

As a preferable technical solution of the refrigerator, the transmission assembly further includes:

the worm is sleeved on an output shaft of the driving motor;

a worm gear engaged with the worm;

an input gear coaxially disposed with the worm gear;

the output gear is sleeved on the driving shaft;

and the middle transmission gear set is meshed between the input gear and the output gear.

As a preferred technical scheme of the refrigerator, the output gear is a one-way gear, and the output torque of the one-way gear is the same as the torque direction required by the overturning beam in the door closing process.

As a preferable technical solution of a refrigerator, the output gear includes:

the gear comprises a gear body, a gear shaft and a gear shaft, wherein one end surface of the gear body is provided with an installation groove, and the side wall of the installation groove is provided with a sliding groove;

the ratchet wheel is arranged in the mounting groove and is uniformly provided with a plurality of ratchet wheel teeth at intervals along the circumferential direction;

one end of the sliding block is abutted against the ratchet teeth, and the other end of the sliding block is in sliding connection with the groove wall of the sliding groove;

and one end of the spring is connected with the sliding block, and the other end of the spring is connected with the bottom of one side groove of the sliding groove, which is far away from the ratchet wheel.

As a preferable technical solution of the refrigerator, the turnover driving mechanism further includes:

and the position detection assembly is used for detecting the position of the rotating arm.

As a preferable technical solution of a refrigerator, the position detecting assembly includes:

the photoelectric sensor comprises a circuit board, a receiving part and an emitting part, wherein the receiving part and the emitting part are arranged on the circuit board at intervals and oppositely;

the shading part is sleeved on the driving shaft and provided with a shading part, and the shading part can synchronously rotate along with the driving shaft so that the shading part intermittently extends into a gap between the receiving part and the transmitting part to shade light.

As a preferred technical scheme of the refrigerator, each door body is correspondingly provided with one rotating mechanism, the rotating mechanisms are configured to drive the corresponding door bodies to rotate relative to the main cabinet body, and the ejection mechanisms are configured to eject the corresponding door bodies to a preset distance relative to the main cabinet body.

An automatic door closing method for a refrigerator is applied to the refrigerator and comprises the following steps:

the rotating mechanism drives the door body to close the door and rotate;

when the door body rotates to a preset position, the driving unit of the turnover driving mechanism acts and drives the rotating arm to rotate, and the rotating arm rotates to drive the turnover beam to turn over;

when the door body is completely closed, the rotating mechanism stops acting and the driving unit stops to a preset initial position.

The invention has the beneficial effects that:

according to the refrigerator provided by the invention, the deflector rod is stirred by the rotating arm, the overturning beam connected with the deflector rod is driven to overturn under the sliding guide of the guide protrusion and the guide groove, the automatic overturning of the overturning beam in the door closing process can be realized, and the smooth operation of automatically opening and closing the door of the refrigerator is ensured; the rotating arm is in contact with the deflector rod but not connected with the deflector rod, so that the overturning beam and the driving unit can be arranged in a split manner, the structural complexity at the overturning beam is reduced, and the processing of the overturning beam is facilitated; simultaneously, because current refrigerator possesses protruding and guide way structure of direction mostly, can set up on the basis of current refrigerator structure, change with little costs, the commonality is strong, can be applicable to current most two door-type refrigerators, reduces the manufacturing cost of refrigerator.

The automatic door closing method for the refrigerator, provided by the invention, can realize the automatic turnover of the turnover beam in the door closing process of the refrigerator, realize the automatic door closing action of the refrigerator and improve the use experience of consumers.

Drawings

Fig. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a part of a refrigerator with a turning beam in a door closing state according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a part of a refrigerator with a turning beam in a door-open state according to an embodiment of the present invention;

fig. 4 is a schematic structural view of the turning beam and the turning driving mechanism in a door-closed state according to the embodiment of the present invention;

fig. 5 is a schematic structural diagram of the turning beam and the turning driving mechanism in the door opening state according to the embodiment of the present invention;

FIG. 6 is a schematic diagram of a split structure of the structure of FIG. 5;

FIG. 7 is a schematic structural diagram of a drive transmission assembly provided by an embodiment of the present invention;

FIG. 8 is a schematic illustration of a disassembled structure of an output gear provided by an embodiment of the present invention;

fig. 9 is a schematic structural view of a drive shaft and a swivel arm according to an embodiment of the present invention.

The figures are labeled as follows:

10-a turnover driving mechanism; 20-a main cabinet body; 30-a door body; 301-upper door body; 302-a lower door body; 40-a rotating mechanism; 50-an ejection mechanism; 60-overturning the beam; 601-a guide projection; 6011-guiding arc surface;

1-a driving lever;

2-a fixed seat; 21-a lower seat body; 211-a guide slot; 2111-guide groove wall; 22-an upper seat body; 221-punching;

3-a drive unit; 31-a tumbler; 311-a shaft connection; 312-an extension arm portion; 32-a drive transmission assembly; 321-a drive motor; 322-output gear; 3221-a gear body; 32211-mounting groove; 32212-a sliding groove; 32213-a snap projection; 3222-ratchet; 32221-ratchet teeth; 32222-anti-rotation protrusions; 3223-closing plate; 32231-a clip groove; 3224-slider; 3225-a spring; 323-a drive shaft; 3231-anti-rotation grooves; 33-protective shell; 331-an upper shell; 332-a lower shell; 34-a torsion spring; 35-a spacing washer; 36-a limit check ring; 37-a limit pin;

4-a position detection component; 41-a photosensor; 42-a shade; 421-light shielding part.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Fig. 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention, fig. 2 is a schematic structural diagram of a part of the refrigerator with a turning beam 60 in a door-closed state according to an embodiment of the present invention, and fig. 3 is a schematic structural diagram of a part of the refrigerator with a turning beam 60 in a door-opened state according to an embodiment of the present invention, as shown in fig. 1 to fig. 3, this embodiment provides a side-by-side type refrigerator, which includes a main cabinet 20, door bodies 30 are pivoted to both sides of the main cabinet 20, an inner side edge of one of the door bodies 30 is pivoted with the turning beam 60, and when the refrigerator is in a closed state, the turning beam 60 is located between the two door bodies 30 to seal the refrigerator. The refrigerator also comprises a door opening and closing device capable of realizing automatic opening and closing of the door body 30, wherein the door opening and closing device comprises an ejection mechanism 50 capable of realizing ejection of the door body 30, a rotating mechanism 40 capable of driving the door body 30 to rotate and a turnover driving mechanism 10 capable of driving the turnover beam 60 to turn over.

In this embodiment, the main cabinet 20 includes a refrigerating chamber and a freezing chamber separated from each other by a partition plate, and correspondingly, the door 30 includes two upper doors 301 opened at an opening of the refrigerating chamber and two lower doors 302 opened at an opening of the freezing chamber, the turning beam 60 is disposed at one of the upper doors 301, and the door opening and closing device is disposed at the top of the main cabinet 20 to realize the automatic door opening and closing action of the upper doors 301. In another embodiment, the freezing compartment may be provided in a drawer type, and in this case, the door 30 includes only the upper door 301 provided at the opening of the refrigerating compartment. In another embodiment, the door opening and closing devices may be respectively disposed at the top and the bottom of the main cabinet 20 to respectively drive the upper door 301 and the lower door 302 to rotate. The main cabinet 20, the door 30, the turning beam 60 and other structures are conventional structures of a refrigerator, and may be arranged by referring to structures in the prior art, which is not the focus of the present invention, and the present invention does not limit and describe specific structures thereof.

The door opening and closing device comprises two sets of ejection mechanisms 50 and two sets of rotating mechanisms 40, the ejection mechanisms and the rotating mechanisms are respectively arranged corresponding to the two upper door bodies 301, and the overturning driving mechanism 10 is arranged at the middle part of the main cabinet body 20 along the length direction thereof corresponding to the overturning beam 60. In the present invention, the rotating mechanism 40 may adopt a structural form of a rotation driving mechanism in CN108362071A, or adopt a structural form of an automatic door opening and closing module in CN209726616U, or may adopt a structural form of another rotating mechanism in the prior art that can drive the door 30 to rotate relative to the main cabinet 20, the ejection mechanism 50 may adopt a structural form of an ejection mechanism 50 in CN109629948A or CN108362071A, or may adopt another structural form in the prior art that can eject the door 30, neither the rotating mechanism 40 nor the ejection mechanism 50 is the gist of the present invention, and the structures of the rotating mechanism 40 and the ejection mechanism 50 are not limited and described in detail in the present invention.

Fig. 4 is a schematic structural diagram of the turning beam 60 and the turning driving mechanism 10 in a door closing state according to an embodiment of the present invention, and fig. 5 is a schematic structural diagram of the turning beam 60 and the turning driving mechanism 10 in a door opening state according to an embodiment of the present invention. As shown in fig. 4 and 5, the turning beam 60 is disposed along a vertical direction, one of the main cabinet 20 and the turning beam 60 is provided with a guide protrusion 601, the other of the main cabinet 20 and the turning beam 60 is provided with a guide groove 201, and the guide protrusion 601 is slidably connected with the guide groove 201. The driving unit 3 comprises a driving transmission assembly 32 and a rotating arm 31, wherein the driving transmission assembly 32 is configured to drive the rotating arm 31 to rotate horizontally to toggle the shift lever 1 to rotate, so that the turnover beam 60 is turned over under the guidance of the guide protrusion 601 and the guide groove 201.

According to the refrigerator provided by the embodiment, the deflector rod 1 is stirred by the rotating arm 31, the turning beam 60 connected with the deflector rod 1 is driven to turn under the sliding guide effect of the guide protrusion 601 and the guide groove 211, the turning beam 60 can be automatically turned in the door closing process, and the automatic door opening and closing action of the refrigerator with the turning beam 60 is realized; the rotating arm 31 is in contact with the shifting rod 1 and is not connected with the shifting rod, so that the overturning beam 60 can be arranged in a split manner with the driving unit 3, the structural complexity of the overturning beam 60 is reduced, and the processing of the overturning beam 60 is facilitated; meanwhile, because the existing refrigerator is mostly provided with the guide protrusion 601 and the guide groove 211, the turnover driving mechanism 10 provided by the embodiment can be arranged on the basis of the existing refrigerator structure, the change cost is low, the universality is strong, and the production cost of the refrigerator is reduced.

In the present embodiment, the guide protrusion 601 is provided at the top of the turnover beam 60, and the guide groove 211 is provided inside the top of the main cabinet 20. In another embodiment, the guide protrusion may be disposed on the main cabinet, and the turning beam 60 may be disposed with the guide groove. In still another embodiment, it is also possible that the guide projection (or guide groove) is provided at the bottom of the turnover beam 60, and the guide groove (or guide projection) is correspondingly provided. The positions of the guide protrusions and the guide grooves are not particularly limited, and the arrangement of the guide protrusions and the guide grooves, which can realize the turning and guiding of the turning beam 60 relative to the main cabinet body 20 in the prior art, can be applied to the present invention.

In this embodiment, the guiding protrusion 601 has a guiding arc 6011, the guiding slot 211 has a guiding slot wall 2111 adapted to the guiding arc 6011, and during the overturning process of the overturning beam 60, the guiding arc 6011 contacts with the guiding slot wall 2111, and the guiding arc 6011 slides along the guiding slot wall 2111, so that the guiding arc 6011 and the guiding slot wall 2111 cooperate to limit the overturning action of the overturning beam 60. The shapes and structures of the guide grooves 211 and the guide protrusions 601 can be designed according to the prior art, and the description thereof is omitted in this embodiment.

The driving unit 3 is stopped at a preset initial position with the position of the turnover beam 60 when the guide protrusion 601 just enters the guide groove 211 and contacts the groove wall of the guide groove 211 as a first position and the position of the lower turnover beam 60 when the door body 30 completely closes as a second position, preferably, with the turnover beam 60 at the second position, and the projection of the rotating arm 31 on the horizontal plane is located outside the projection of the guide groove 211 on the horizontal plane. According to the arrangement, when the turnover driving mechanism 10 does not act and the turnover beam 60 is turned over from the second position to the first position, the shifting rod 1 is not in contact with the rotating arm 31, so that the refrigerator can be compatible with the original manual door opening action and the manual door closing action of the refrigerator on the basis of not interfering the turnover driving mechanism 10, and the operation flexibility of the refrigerator is improved.

More preferably, in the present embodiment, the shift lever 1 is vertically disposed on an upper end surface of the guide protrusion 601 to improve the shifting convenience of the shift lever 1 by the rotation arm 31. In other embodiments, the shift lever 1 may also be disposed horizontally or vertically on a side of the guide protrusion 601 away from the door body 30.

Fig. 6 is a schematic view showing a disassembled structure of the structure in fig. 5, and as shown in fig. 6, more preferably, the rotating arm 31 includes a shaft connecting portion 311 vertically arranged and extending arm portions 312 radially outwardly extending along the shaft connecting portion 311, the shaft connecting portion 311 is in transmission connection with the driving transmission assembly 32, at least two extending arm portions 312 are uniformly arranged along the circumferential direction of the shaft connecting portion 311 at intervals, and when the guide protrusion 601 is inserted into the guide groove 211, the shift lever 1 is located between two adjacent extending arm portions 312. With this arrangement, by setting the angle between two adjacent extension arm portions 312 to match the rotation angle required for the turning beam 60 to turn the turning beam 31 once, the state of the turning beam 31 can be consistent with the state before turning after the turning beam 60 is turned by the turning arm 31 once, and no additional reset operation is required before the turning beam 60 is driven to turn next, thereby improving the reset performance and the operation and control convenience of the turnover driving mechanism 10. In other embodiments, only one extension arm 312 may be provided, in which the rotation arm 31 is reset by the driving transmission assembly 32, or the rotation arm 31 is reset by the reverse rotation of the rotation arm 31 during the door opening and closing actions. In the present embodiment, the initial position refers to a position where the tumbler 31 is driven to rotate and then the toggle lever 1 is touched for a short time, and when the tumbler 31 has only one extension arm 312, the reset of the tumbler 31 can be realized by rotating one turn, and when the tumbler 31 has a plurality of extension arms 312, the reset of the tumbler 31 can be realized by rotating a corresponding angle, for example, when there are two extension arms 312, the reset of the position of the tumbler 31 can be realized by rotating 180 °.

In the present embodiment, since the turnover beam 60 is disposed on the upper door 301 on the left side of the refrigerator, when the rotating arm 31 rotates counterclockwise (when viewed from the top of the refrigerator), the turnover beam 60 is carried to turn over the door 30 when the door is closed. In other embodiments, the turning beam 60 may also be disposed at the upper door 301 on the right side of the refrigerator, and when the rotating arm 31 rotates clockwise (looking down from the top of the refrigerator), the turning beam 60 is driven to turn the door when the door is opened.

In the present embodiment, the number of extension arm sections 312 is related to the roll stability of the roll-over beam 60 and the size of the roll-over beam 60: when the number of the extension arm parts 312 is larger, the rotation angle of the rotating arm 31 required by the turnover beam 60 to complete one turnover is smaller, that is, the change of the curvature of the guide groove wall 2111 is larger, which is more disadvantageous to the smooth turnover of the turnover beam 60, and when the number of the extension arm parts 312 is smaller, the rotation angle of the rotating arm 31 required by the turnover beam 60 to complete one turnover is larger, that is, the change of the curvature of the guide groove wall 2111 is smaller, which increases the turnover stability of the turnover beam 60, but the size of the guide projection 601 is correspondingly increased. In this embodiment, the number of the extension arm parts 312 is three, and an included angle formed between two adjacent extension arm parts 312 is 120 °, that is, the rotating arm 31 rotates 120 °, so as to complete one-time overturning of the overturning beam 60, and the size of the overturning beam 60 can be reduced while the moving stability of the overturning beam 60 is maintained. In other embodiments, the number of the extension arm portions 312 may be two or more.

Fig. 7 is a schematic structural diagram of the driving transmission assembly 32, and as shown in fig. 6 and 7, in the present embodiment, the driving transmission assembly 32 includes a driving motor 321, a transmission assembly, and a driving shaft 323. Preferably, the driving motor 321 and the transmission assembly are both disposed in the protection casing 33, the protection casing 33 is disposed on the outer side of the top of the main cabinet 20, the protection casing 33 includes an upper casing 331 and a lower casing 332 which are fastened together, and the lower casing 332 is detachably connected to the top plate of the main cabinet 20. The driving shaft 323 is vertically disposed, an upper end of the driving shaft 323 penetrates through a top plate of the main cabinet 20 and penetrates into the protective casing 33, and a lower end of the driving shaft 323 is sleeved with the rotating arm 31. By arranging the driving motor 321 and the transmission assembly at the top outer side of the main cabinet 20, the occupation of the refrigerator refrigerating space by the turnover driving mechanism 10 can be reduced. In another embodiment, the output shaft of the driving motor 321 may be vertically disposed, and the driving motor 321 is connected to the shaft connecting portion 311 of the rotating arm 31 by a shaft coupling or the like, so that the driving motor 321 directly drives the rotating arm 31 to rotate. In another embodiment, all the components of the driving unit 3 may be disposed inside the main cabinet 20, which is not limited by the present invention. The driving motor 311 may be a stepping motor, a servo motor, a reduction motor, or any other type of rotating motor, and the type of the driving motor 311 is not limited in the present invention.

Further, the transmission assembly includes a worm sleeved on the output shaft of the driving motor 321, a worm wheel meshed with the worm, an input gear coaxially arranged with the worm wheel, and an intermediate transmission gear set sleeved on the output gear 322 of the driving shaft 323 and meshed between the input gear and the output gear 322. This kind of structural arrangement can carry out the speed reduction setting through the progression that sets up middle drive gear group, reduces the rotational speed of drive shaft 323, increases the moment of torsion of drive shaft 323 to improve upset reliability and the stability of upset roof beam 60. In this embodiment, the intermediate transmission gear set includes a first gear and a second gear coaxially disposed, wherein the first gear is engaged with the input gear, the second gear is engaged with the third gear, and the fourth gear is engaged with the output gear 322. In other embodiments, the number of the intermediate transmission gear sets and the number of the teeth of each gear may be specifically set according to a required transmission ratio, which is a conventional technical means in the art, and the details of this embodiment are not repeated.

Fixing base 2 sets up at the top of the main cabinet body 20 inboardly, has seted up guide way 211 on fixing base 2, for protecting rotor arm 31, fixing base 2 includes last seat 22 and lower seat 21 that the lock formed from top to bottom, goes up the inboard of seat 22 and the main cabinet body 20 roof and is connected, and seat 21 can be dismantled with the mode that last seat 22 accessible threaded connection or joint are connected down and be connected, and guide way 211 is seted up in the bottom of seat 21 down and is link up down seat 21. The rotating arm 31 is sleeved on the driving shaft 323, and the rotating arm 31 is higher than the connecting surface of the lower seat body 21 and the upper seat body 22.

The connecting surface between the upper seat 22 and the lower seat 21 is provided with a cylindrical accommodating cavity for accommodating the rotating arm 31, and the upper seat 22 is vertically provided with a through hole 221 communicated with the accommodating cavity for the driving shaft 323 to penetrate into the fixing seat 2 and be connected with the rotating arm 31. Preferably, the receiving cavity is open toward one side of the turning beam 60, and the upper seat 22 is connected to one end of the lower seat 21 away from the turning beam 60 in a snap-fit manner, so that the guide slot 211 formed in the lower seat 21 and a portion of the rotating arm 31 are exposed out of the fixing seat 2. This kind of structural setting, can avoid driving lever 1 when in guide way 211 and the interference between the upper seat body 22, simplify the processing of fixing base 2, simultaneously, reduce the whole thickness of fixing base 2.

Preferably, in the present embodiment, the output gear 322 is a one-way gear, and the output torque of the one-way gear is in the same direction as the rotation torque required by the turnover beam 60 when the door is closed, i.e., in the present embodiment, the rotation direction of the one-way gear is counterclockwise. In this arrangement, when the door 30 is in an open state and the turnover mechanism causes the rotating arm 31 to stay at the middle position due to a fault, the manual door closing operation can rotate the shift lever 1 to contact the rotating arm 31, so as to drive the rotating arm 31 and the driving shaft 323 to rotate counterclockwise until the rotating arm 31 is separated from the shift lever 1; when the tumble driving mechanism 10 is in the door closing motion and the door 30 is subjected to the force in the same direction as the door closing motion, the position of the shift lever 1 is in front of the rotating arm 31, so the tumble beam and the shift lever 1 reach the door closing position before the rotating arm 31 without hindrance, and the driving motor 321 and the transmission assembly continue the door closing motion until reaching the preset position and then stop.

Fig. 8 is a schematic diagram of a disassembled structure of the output gear 322 according to an embodiment of the present invention, and as shown in fig. 8, the output gear 322 includes a gear body 3221, a sealing plate 3223, a ratchet wheel 3222, a slider 3224, and a spring 3225, which are coaxially disposed. The ratchet wheel 3222 comprises a plurality of ratchet wheel teeth 32221 uniformly arranged along the circumferential direction thereof at intervals, the ratchet wheel teeth 32221 are provided with a back side surface, a circumferential side surface and a front side surface which are sequentially connected, the back side surface of each ratchet wheel tooth 32221 is of an arc-shaped structure, one end of the back side surface is connected with the front side surface of the adjacent ratchet wheel tooth 32221, and the other end of the back side surface obliquely extends counterclockwise along the direction away from the center of the ratchet wheel 3222 and is connected with the circumferential side surface; the circumferential sides of all ratchet teeth 32221 are located on the same circumference, and one end of the circumferential side is connected to the back side, and the other end is connected to the front side, which is a planar structure. The end surface of the gear body 3221 is provided with a cylindrical mounting groove 32211, a plurality of sliding grooves 32212 are uniformly arranged on the groove wall of the mounting groove 32211 along the circumferential direction at intervals, and the sliding grooves 32212 are communicated with the mounting groove 32211. One end of the slider 3224 abuts against the back side surface of the ratchet teeth 32221 and is attached to the back side surface, the other end of the slider 3224 extends into the sliding groove 32212 and is slidably connected with the groove wall of the sliding groove 32212, and a spring 3225 is connected between the slider 3224 and the groove bottom of the sliding groove 32212.

When the ratchet wheel 3222 rotates clockwise, the slider 3224 slides relative to the back side of the ratchet wheel 3222 in a direction away from the center of the ratchet wheel 3222, and the back side presses the slider 3224 to slide the slider 3224 in a direction deep into the sliding groove 32212, the spring 3225 is compressed, and the ratchet wheel 3222 rotates continuously, so that the slider 3224 moves to the back side of the adjacent ratchet wheel tooth 32221 after stroking over the back side and the peripheral side of one ratchet wheel tooth 32221, after crossing over the front side, so that the slider 3224 and the ratchet wheel 3222 slide continuously relative to each other, i.e., at this time, the ratchet wheel 3222 rotates, and the gear body 3221 does not rotate along with the ratchet wheel 3222; when the ratchet wheel 3222 rotates counterclockwise, the slider 3224 slides relative to the back side of the ratchet wheel 3222 in a direction approaching the center of the ratchet wheel 3222 until after one side of the slider 3224 abuts against the front side of the adjacent ratchet wheel tooth 32221, the ratchet wheel 3222 drives the slider 3224 to rotate along with the ratchet wheel 3222, that is, the ratchet wheel 3222 and the gear body 3221 rotate synchronously.

To prevent the ratchet 3222 from escaping from the mounting groove 32211, a sealing plate 3223 is disposed at an opening of the mounting groove 32211. Preferably, the depth of the mounting groove 32211 is equal to or slightly less than the thickness of the ratchet wheel 3222, and the sealing plate 3223 abuts against an end surface of the gear body 3221 to prevent the ratchet wheel 3222 from axially moving within the mounting groove 32211. Further, a plurality of clamping protrusions 32213 are convexly disposed on the end surface of the gear body 3221 along the circumferential direction thereof at intervals, and the plurality of clamping protrusions 32213 are preferably uniformly distributed along the circumferential direction of the gear body 3221 at intervals. A plurality of clamping grooves 32231 are formed in the sealing plate 3223 at intervals along the circumferential direction thereof, the clamping grooves 32231 are arranged in one-to-one correspondence with the clamping protrusions 32213, and the clamping protrusions 32213 are clamped in the clamping grooves 32231. The arrangement of the clamping protrusions 32213 and the clamping grooves 32231 is beneficial to improving the installation coaxiality of the sealing plate 3223 and the gear body 3221, and preventing the central through hole on the gear body 3221 and the central through hole on the sealing plate 3223 from being arranged in a staggered manner. More preferably, the clamping protrusions 32213 and the clamping grooves 32231 are both fan-shaped ring structures, and the major diameter of the fan-shaped ring structures is equal to the outer diameter of the sealing plate 3223.

The structure of the one-way gear provided in this embodiment is an exemplary structure, and it can be understood that the structure of the one-way gear in the prior art can be applied to the present invention, and the present invention does not specifically limit the structure of the one-way gear.

Fig. 9 is a schematic structural diagram of the driving shaft 323 and the rotating arm 31 according to the embodiment of the present invention, and as shown in fig. 9, it is further preferable that a torsion spring 34 is sleeved on the output shaft, one end of the torsion spring 34 is fixed with respect to the rotating arm 31, and the other end of the torsion spring 34 is fixed with respect to the driving shaft 323. The torsion spring 34 is arranged, when the turnover driving mechanism 10 normally operates, the torsion force of the torsion spring 34 drives the driving shaft 323 and the rotating arm 31 to simultaneously act and push the turnover beam 60 to turn over; when the turnover driving mechanism 10 is out of order to enable the rotating arm 31 to stay at the middle position and the door body 30 is in a closed state, the poking rod 1 can be rotated to be in contact with the rotating arm 31 through manual door opening action, the poking rod 1 applies clockwise torque to the rotating arm 31, and when the torque is larger than the torque of the torsion spring 34, the rotating arm 31 rotates reversely to enable the poking rod 1 to cross the rotating arm 31 to achieve the door opening action; after the shift lever 1 is separated from the rotating arm 31, the rotating arm 31 is reset under the action of the torsion spring 34, and then the rotating arm 31 is shifted counterclockwise by the manual door closing action, so that the rotating arm 31 drives the driving shaft 323 and the output gear 322 to rotate counterclockwise to a position where the rotating arm 31 is separated from the shift lever 1. And the torsion spring 34 can also relieve the influence of the impact force borne by the turnover beam 60 in the turnover process on the driving transmission assembly 32, and can perform overload protection on the driving motor 321, the transmission assembly, the driving shaft 323, the rotating arm 31 and the like.

Further, in order to prevent the rotation arm 31 from moving downward in the axial direction of the drive shaft 323, it is preferable that a stopper spacer 35 is fitted over the drive shaft 323, a stopper pin 37 is inserted into the lower end of the drive shaft 323, both ends of the stopper pin 37 protrude from the drive shaft 323, the lower end surface of the stopper spacer 35 abuts against the stopper pin 37, and the upper end surface of the stopper spacer 35 abuts against the lower end surface of the rotation arm 31. In order to prevent the rotating arm 31 from moving upward along the axial direction of the driving shaft 323, it is preferable that a limit stopper 36 is sleeved on the driving shaft 323, the lower surface of the limit stopper 36 is connected with the upper end of the torsion spring 34, and the upper end surface of the limit stopper 36 abuts against the inner surface of the main cabinet 20. In other embodiments, axial retention of rotatable arm 31 on drive shaft 323 may also be provided by providing a shoulder structure of drive shaft 323.

As shown in fig. 7, in the present embodiment, in order to monitor the position of the rotating arm 31, it is preferable that the tumble drive mechanism 10 further includes a position detecting assembly 4. More preferably, the position detecting assembly 4 includes a photoelectric sensor 41 and a light shielding member 42, the photoelectric sensor 41 includes a circuit board, and an emitting portion and a receiving portion which are disposed on the circuit board at intervals, the circuit board is detachably connected to the housing by screws or the like, and the emitting portion and the receiving portion are disposed at an end of the circuit board facing the output gear 322. The light shielding member 42 is sleeved on the driving shaft 323, and the light shielding member 42 is provided with a light shielding portion 421, when the light shielding member 42 rotates along with the driving shaft 323, the light shielding portion 421 intermittently extends between the emitting portion and the receiving portion to shield light emitted by the photoelectric sensor 41, thereby changing an output signal of the photoelectric sensor 41.

In the present embodiment, the light shielding portions 421 are provided in plurality at regular intervals in the circumferential direction of the light shielding member 42, and the number of the light shielding portions 421 corresponds to the number of the extension arm portions 312 one by one, so that the position of the rotating arm 31 can be determined by the signal change of the photosensor 41. In the embodiment, the position of the rotating arm 31 is detected by adopting a non-contact light sensor, so that the service life is long, and the detection precision is high. In other embodiments, a mechanical angle sensor may also be used to monitor the position of the rotating arm 31, and this embodiment will not be described in detail.

Further, in this embodiment, in order to ensure that the driving shaft 323 rotates synchronously with the ratchet 3222 and the light shielding member 42, the driving shaft 323 is axially provided with a rotation-preventing groove 3231, the inner side wall of the central through hole of the ratchet 3222 and the inner side wall of the central through hole of the light shielding member 42 are both convexly provided with a rotation-preventing protrusion 32222 adapted to the rotation-preventing groove 3231, the rotation-preventing protrusion 32222 is inserted into the rotation-preventing groove 3231 to prevent the driving shaft 323 from rotating relative to the ratchet 3222 or the light shielding member 42, so as to improve the synchronous motion precision of the driving shaft 323, the ratchet 3222 and the light shielding member 42, and thus improve the rotation speed and torque transmission precision and the accuracy of position detection. In this embodiment, three anti-rotation grooves 3231 are uniformly arranged along the circumferential direction of the driving shaft 323 at intervals, the anti-rotation protrusions 32222 and the anti-rotation grooves 3231 are arranged in a one-to-one correspondence, in other embodiments, the anti-rotation protrusions 32222 may also be arranged on the driving shaft 323, the anti-rotation grooves 3231 are arranged on the inner side wall of the central through hole of the ratchet 3222 and the light shielding member 42, and the number of the anti-rotation grooves 3231 and the number of the anti-rotation protrusions 32222 may be set according to requirements.

The embodiment also provides an automatic door closing method of a refrigerator, which is applied to the refrigerator and comprises the following steps:

the rotating mechanism 40 drives the door body 30 to perform door closing rotation;

when the door body 30 rotates to a preset position, the driving unit 3 of the turnover driving mechanism 10 acts and drives the rotating arm 31 to rotate, and the rotation of the rotating arm 31 drives the turnover beam 60 to turn over;

when the door 30 is completely closed, the rotation mechanism 40 stops and the driving unit 3 stops to the preset initial position.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. The utility model provides a refrigerator, includes the main cabinet body (20), the relative both sides of the main cabinet body (20) all articulate there is a body (30), one of them the inboard pin joint of door body (30) has upset roof beam (60), the main cabinet body (20) with one in upset roof beam (60) is provided with direction arch (601), the main cabinet body (20) with another in upset roof beam (60) is provided with guide way (201), direction arch (601) with guide way (201) sliding fit, its characterized in that still includes upset actuating mechanism (10), upset actuating mechanism (10) include:

the deflector rod (1) is convexly arranged on the overturning beam (60);

the driving unit (3) comprises a driving transmission assembly (32) and a rotating arm (31), wherein the driving transmission assembly (32) is configured to drive the rotating arm (31) to horizontally rotate so as to toggle the shifting lever (1), so that the overturning beam (60) overturns under the guidance of the guide protrusion (601) and the guide groove (201).

2. The refrigerator according to claim 1, wherein a projection of the rotation arm (31) on a horizontal plane is located outside a projection of the guide groove (201) on the horizontal plane when the driving unit (3) is stopped at a preset initial position.

3. The refrigerator according to claim 1, wherein the rotation arm (31) includes a shaft connection portion (311) and extension arm portions (312) extending radially outward from the shaft connection portion (311), the shaft connection portion (311) is vertically disposed and drivingly connected to the drive transmission assembly (32), the extension arm portions (312) are disposed at least two at regular intervals in a circumferential direction of the shaft connection portion (311), and the lever (1) is located between adjacent two of the extension arm portions (312) when the guide protrusions (601) are inserted into the guide grooves (211).

4. The refrigerator according to claim 3, characterized in that the drive transmission assembly (32) comprises:

a drive motor (321);

the transmission assembly comprises a driving shaft (323) which is vertically arranged, an output shaft of the driving motor (321) is connected with the driving shaft (323), and the rotating arm (31) is sleeved on the driving shaft (323).

5. The refrigerator according to claim 4, wherein a torsion spring (34) is sleeved on the driving shaft (323), one end of the torsion spring (34) is fixed relative to the rotating arm (31), and the other end of the torsion spring (34) is fixed relative to the driving shaft (323).

6. The refrigerator of claim 4, wherein the transmission assembly further comprises:

the worm is sleeved on an output shaft of the driving motor (321);

a worm gear engaged with the worm;

an input gear coaxially disposed with the worm gear;

an output gear (322) sleeved on the driving shaft (323);

and the intermediate transmission gear set is meshed between the input gear and the output gear (322).

7. The refrigerator of claim 6, wherein the output gear (322) is a one-way gear having an output torque in the same direction as a torque required for the turning beam (60) to turn during door closing.

8. The refrigerator according to claim 7, wherein the output gear (322) comprises:

the gear comprises a gear body (3221), wherein one end surface of the gear body is provided with an installation groove (32211), and the side wall of the installation groove (32211) is provided with a sliding groove (32212);

the ratchet wheel (3222) is arranged in the mounting groove (3221), and a plurality of ratchet wheel teeth (32221) are uniformly arranged on the ratchet wheel (3222) at intervals along the circumferential direction of the ratchet wheel;

one end of the sliding block (3224) abuts against the ratchet wheel teeth (3221), and the other end of the sliding block is in sliding connection with the groove wall of the sliding groove (32211);

and one end of the spring (3225) is connected with the slider (3224), and the other end of the spring is connected with the groove bottom at one side of the sliding groove (32211) far away from the ratchet wheel (3222).

9. The refrigerator of claim 4, wherein the tumble driving mechanism further comprises:

a position detection assembly (4) for detecting the position of the rotating arm (31).

10. The refrigerator according to claim 9, characterized in that the position detection assembly (4) comprises:

the photoelectric sensor (41), the photoelectric sensor (41) includes the circuit board and interval and relatively set up receiving department and transmitting department on the said circuit board;

the light shielding part (42) is sleeved on the driving shaft (323), the light shielding part (42) is provided with a light shielding part (421), and the light shielding part (42) can synchronously rotate along with the driving shaft (323) so that the light shielding part (421) intermittently extends into a gap between the receiving part and the transmitting part to shield light.

11. The refrigerator according to any one of claims 1-10, wherein each door body (30) is correspondingly provided with a rotating mechanism (40), and the rotating mechanism (40) is configured to drive the corresponding door body (30) to rotate relative to the main cabinet body (20).

12. An automatic door closing method for a refrigerator, applied to the refrigerator as claimed in claim 11, and comprising the steps of:

the rotating mechanism (40) drives the door body (30) to perform door closing rotation;

when the door body (30) rotates to a preset position, the driving unit (3) of the turnover driving mechanism (10) acts and drives the rotating arm (31) to rotate, and the rotating arm (31) rotates to drive the turnover beam (60) to turn over;

when the door body (30) is completely closed, the rotating mechanism (40) stops acting and the driving unit (3) stops to a preset initial position.