CN109826926B - Automatic door opening device and refrigerator with same - Google Patents

Automatic door opening device and refrigerator with same Download PDF

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Publication number
CN109826926B
CN109826926B CN201811513373.3A CN201811513373A CN109826926B CN 109826926 B CN109826926 B CN 109826926B CN 201811513373 A CN201811513373 A CN 201811513373A CN 109826926 B CN109826926 B CN 109826926B
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CN
China
Prior art keywords
gear
way clutch
clutch bearing
push rod
automatic door
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CN201811513373.3A
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Chinese (zh)
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CN109826926A (en
Inventor
费斌
许以浩
王目喜
尚亚洲
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Haier Zhijia Co Ltd
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Haier Zhijia Co Ltd
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Abstract

The invention provides an automatic door opening device and a refrigerator using the same, wherein the automatic door opening device is used for automatically opening a door body of the refrigerator and comprises a shell, a driving component, a pushing component and a transmission component, and the transmission component comprises: a first gear set; a second gear set; the third gear set comprises a first left gear; the fourth gear set comprises a second left gear, and a first one-way clutch bearing set is arranged in the second left gear; the fifth gear set comprises a third left gear which is connected with the pushing piece; the first left gear is overlapped on the second left gear, and a rotating shaft of the first left gear enters the first one-way clutch bearing set; when the first transmission direction of the first one-way clutch bearing set is the same as the rotation direction of the first left gear, the first left gear and the second left gear rotate coaxially, and the second left gear drives the third left gear, so that the pushing piece extends out of the shell or resets.

Description

Automatic door opening device and refrigerator with same
Technical Field
The invention relates to an automatic door opening device and a refrigerator with the same.
Background
At present, medium and high-grade refrigerators in the market are relatively large, door bodies, load weight of the door bodies and door seal suction of the door bodies or drawer type door bodies are large, and more users feed back refrigerator door bodies and are not easy to open. To this problem, electric opening devices have emerged.
In the existing electric opening device, in the process of opening the door body, a motor drives a screw rod to rotate forwards, the screw rod is meshed with a gear assembly, and then a push rod is driven to drive the door body to be opened; when the door is opened, the motor drives the screw rod to rotate reversely, and the screw rod is meshed with the gear assembly to further drive the push rod to reset. According to the electric opening device, the motor adopts a double-shaft motor, and the two sides of the two shafts are respectively provided with a one-way clutch bearing which is respectively driven to drive the left worm or the right worm to drive when the motor rotates forwards or reversely. Wherein, the operating noise of biax motor is great. In addition, a rack is often designed on the push rod, the extension and the reset of the push rod are realized through the matching of the rack and a gear assembly, and the push rod with the rack increases the production and manufacturing cost to a certain extent and also increases the structural complexity of the whole electric opening device.
Therefore, there is a need for an improved automatic door opening device and a refrigerator having the same to solve the above problems.
Disclosure of Invention
The invention aims to provide an automatic door opening device and a refrigerator using the same, so as to overcome the problems.
The invention provides an automatic door opening device, which is used for automatically opening a door body of a refrigerator and comprises a shell, a driving component fixed in the shell, a pushing component used for opening the door body and a transmission component arranged between the driving component and the pushing component, wherein the transmission component comprises: a first gear set; a second gear set; a third gear set including a first left gear; the fourth gear set comprises a second left gear, and a first one-way clutch bearing set is arranged in the second left gear; the fifth gear set comprises a third left gear, the third left gear is connected with the first group of pushing pieces of the pushing pieces, and the third left gear is meshed with the second left gear; the first left gear is overlapped on the second left gear, and a rotating shaft of the first left gear enters the first one-way clutch bearing set; when the first transmission direction of the first one-way clutch bearing set is the same as the rotation direction of the first left gear, the first left gear and the second left gear rotate coaxially, the second left gear drives the third left gear, and the third left gear drives the first set of pushing pieces to extend out of or reset from the shell; when the first transmission direction of the first one-way clutch bearing set is opposite to the rotation direction of the first left gear, the first left gear rotates relative to the second left gear.
As an optional technical solution, the third gear set further includes a first right gear; the fourth gear set also comprises a second right gear, a second one-way clutch bearing set is arranged in the second right gear, the first right gear is overlapped on the second right gear, and a rotating shaft of the first right gear enters the second one-way clutch bearing set; the fifth gear set also comprises a third right gear, the third right gear is connected with the second group of pushing pieces of the pushing pieces, and the third right gear is meshed with the second right gear; when the second transmission direction of the second one-way clutch bearing group is the same as the rotation direction of the first right gear, the first right gear and the second right gear rotate coaxially, the second right gear drives the third right gear, and the third right gear drives the pushing piece to extend out of or reset from the shell; when the second transmission direction of the second one-way clutch bearing group is opposite to the rotation direction of the first right gear, the first right gear rotates relative to the second right gear.
As an optional technical solution, the first transmission direction of the first one-way clutch bearing set is opposite to the second transmission direction of the second one-way clutch bearing set, so that the first set of pushing members or the second set of pushing members extends or resets from the housing.
As an optional technical solution, the first set of pushing members includes a first connecting rod and a first push rod, and two ends of the first connecting rod are respectively pivoted to the third left gear and the first push rod.
As an optional technical solution, the third left gear rotates to drive the first link to move, the first link drives the first push rod to extend or reset, after the first push rod is reset, the end of the first link triggers the first micro-control switch in the housing, the first micro-control switch is triggered, the first processor connected to the first micro-control switch sends a stop signal, and the driving assembly stops working.
As an optional technical solution, the second set of pushing members includes a second connecting rod and a second push rod, and two ends of the second connecting rod are respectively pivoted with the third right gear and the second push rod.
As an optional technical solution, the third right gear rotates to drive the second connecting rod to move, the second connecting rod drives the second push rod to extend or reset, after the second push rod is reset, the end of the second connecting rod triggers the second micro-control switch in the housing, the second micro-control switch is triggered, the second processor connected with the second micro-control switch sends a stop signal, and the driving assembly stops working.
As an optional technical solution, the first right gear set and the first left gear set are symmetrically arranged with the second gear set as a center.
As an optional technical solution, the first gear set includes a first main gear and a first sub-gear, which are coaxially disposed, and the second gear set includes a second main gear and a second sub-gear, which are coaxially disposed, wherein the first main gear engages with the driving assembly, the first sub-gear engages with the second main gear, the second sub-gear is located between the first left gear and the first right gear, and the second sub-gear simultaneously engages with the first left gear and the first right gear.
As an alternative solution, the driving assembly includes a driving motor and a worm extending from an output end of the driving motor, the worm engaging with the first main gear.
The invention also provides a refrigerator comprising the automatic door opening device.
When the automatic door opener is used as a double-rod automatic door opener, a first one-way clutch bearing group and a second one-way clutch bearing group are arranged in a transmission assembly, and one of two gears respectively connected with the first one-way clutch bearing group and the second one-way clutch bearing group is driven by controlling the first transmission direction of the first one-way clutch bearing group to be opposite to the second transmission direction of the second one-way clutch bearing group, so that one of two push rods is extended or reset. In addition, when the first transmission direction of controlling the first one-way clutch bearing group is the same as the second transmission direction of the second one-way clutch bearing group, the two gears respectively connected with the first one-way clutch bearing group and the second one-way clutch bearing group are driven at the same time, and then the two push rods are stretched out or reset at the same time. In the double-rod automatic door opening device, the extension or the reset of the push rod can be completed only by one driving motor, so that the working noise can be reduced.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
Fig. 1 is a schematic structural view of an automatic door opener according to the present invention.
Fig. 2 is a schematic structural view of a second housing of the automatic door opener of the present invention at a viewing angle.
Fig. 3 is a schematic structural view of the second housing of the automatic door opener of the present invention from another view angle.
Fig. 4 is a schematic view of a third gear set and a fourth gear set of the automatic door opener of the present invention.
Fig. 5 is an exploded view of the third gear set and the fourth gear set of the automatic door opener of the present invention.
Fig. 6 is an exploded view of the first link and the first push rod of the automatic door opener of the present invention.
Fig. 7 is a schematic structural view of a refrigerator according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Fig. 1 is a schematic structural view of an automatic door opener according to the present invention; fig. 2 is a schematic structural view of a second housing of the automatic door opener of the present invention at a viewing angle; fig. 3 is a schematic structural view of the second housing of the automatic door opener of the present invention from another view angle.
Referring to fig. 1 to 3, which illustrate 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 equipment that needs to be opened electrically, such as a refrigerator, and is installed behind a door body of the equipment or a door body of a drawer, so as to open the door body of the equipment or the door body of the drawer on the equipment by pushing.
The automatic door opening device 100 comprises a shell, a driving assembly fixed in the shell, a pushing member partially movably arranged in the shell and used for pushing the door body to be opened, and a transmission assembly arranged between the driving assembly and the pushing member; in an embodiment of the present invention, the automatic door opener 100 further includes a control board 30 (e.g., a printed circuit board) for receiving a door opening signal and controlling the operation of the automatic door opener, and the door opener 100 will be described in detail below.
As shown in fig. 1, the housing includes, for example, a first housing 10 and a second housing 20, the first housing 10 is covered on the second housing 20, and the first housing 10 and the second housing 20 are fixedly connected by a screw or a concave-convex engaging structure in order to improve assembling efficiency, strength, and assembling reliability and stability. The first casing 10 and the second casing 20 are combined to form an accommodating cavity, and the driving assembly, the pushing member and the transmission assembly arranged between the driving assembly and the pushing member are located in the accommodating cavity, preferably, the driving assembly, the pushing member and the transmission assembly arranged between the driving assembly and the pushing member are respectively combined to the second casing 20. The first housing 10 has at least one first recess 11, the second housing 20 has at least one second recess 21, each first recess 11 corresponds to each second recess 21, when the first housing 10 and the second housing 20 are combined, each first recess 11 and each second recess 21 form an opening together, and the pushing member can extend out of or reset from the opening.
As shown in fig. 2 to fig. 3, the driving assembly 40 is electrically connected to the control board 30, the driving assembly 40 is, for example, a driving motor, an output end of the driving motor has a worm 41, the driving motor is mounted on a motor fixing bracket 42, and the motor fixing bracket 42 is disposed on the second housing 20 and located in the accommodating cavity. In this embodiment, the worm 41 is engaged with the first main gear 51 of the first gear set 50 of the transmission assembly, and when the driving motor works, the transmission assembly is driven by the rotation of the worm 41, and the transmission assembly drives the pushing member to extend out of or return to the opening.
As shown in fig. 1 to 3, the transmission assembly of the automatic door opener 100 includes a first gear set 50, a second gear set 60, a third gear set, a fourth gear set and a fifth gear set, wherein the first gear set 50 includes a first sub-gear 51 and a first main gear 52 coaxially disposed, and the first main gear 52 is engaged with the worm 41; the second gear set 60 includes a second sub-gear 62 and a second main gear 61 coaxially disposed, the second main gear 61 and the first sub-gear 51 are engaged with each other; the third gear set comprises a pair of independent first left gear 71 and first right gear 72, and the second sub-gear 62 is meshed with the first left gear 71 and the first right gear 72; the fourth gear set includes a pair of independent second left and right gears 81 and 82, the second left gear 81 and the first left gear 71 are overlapped with each other, and the second right gear 82 and the first right gear 72 are overlapped with each other; the fifth gear set includes a pair of independent third left and right gears 91 and 92, the third left gear 91 intermeshes with the second left gear 81, and the third right gear 92 intermeshes with the second right gear 82.
It should be noted that, in the present embodiment, the automatic door opening device 100 with two pushing members is taken as an example for illustration, and therefore, each of the third gear set to the fifth gear set includes a pair of independent left gear and right gear, and the left gear and the right gear are independent of each other and are respectively used for driving the pushing rods of the two pushing members to extend or return in the corresponding openings. Of course, in other embodiments of the present invention, the automatic door opening device may also include only one pushing element, and in this case, each of the third to fifth gear sets has only one of a left gear and a right gear, and one of the left gear and the right gear may also drive one pushing element to extend or return in the opening.
In the present embodiment, a pair of gears in the third to fifth gear sets is distinguished by "left gear" and "right gear", wherein "left" and "right" are defined and distinguished only by the left and right sides of the user when the pushing member of the automatic door opening device 100 faces the user, so as to better understand the contents of the present invention, but not by this, so as to limit the scope of the claims of the present invention. In other words, those skilled in the art can define and distinguish each pair of gears in the third, fourth and fifth gear sets in other manners according to actual needs or habits. In addition, the above-mentioned "first, second, third, fourth and fifth" are also only used for distinguishing similar elements in the automatic door opening device so as to better understand the content of the present invention, and thus the scope of the claims of the present invention is not limited thereby.
Fig. 4 is a schematic view of a third gear and a fourth gear of the automatic door opening device of the present invention; fig. 5 is a schematic view of a third gear and a disassembled fourth gear of the automatic door opener according to the present invention.
As shown in fig. 2 and fig. 4 to fig. 5, the first left gear 71 is overlapped on the second left gear 81, the first left gear 71 is meshed with the second sub-gear 62, and the second left gear 81 is meshed with the third left gear 91, wherein the first left gear 71 includes a first tooth-shaped structure 711 and a rotation shaft 712 extending from a bottom surface of the first tooth-shaped structure 711 toward the second left gear 81; the second left gear 81 is provided with a first one-way clutch bearing set, the first one-way clutch bearing set includes a base 813, a metal housing 812 and a roller 811, the base 813 has a first accommodating portion 8131, the metal housing 812 has a second accommodating portion 8121, the roller 811 is accommodated in the second accommodating portion 8121, the metal housing 812 is accommodated in the first accommodating portion 8131, or the base 813, the metal housing 812 and the roller 811 are sequentially sleeved so that the metal housing 812 is located between the base 813 and the roller 811.
The roller member 811 includes a third accommodating portion 8111, the first left gear 71 is overlapped on the second left gear 81, and the rotating shaft 712 of the first left gear 71 enters the third accommodating portion 8111. The roller member 811 includes a plurality of roller shafts 8112 for rolling in a single direction. When the first transmission direction is the same as the rotation direction of the first left gear 71, a large friction force is formed between the rotation shaft 712 of the first left gear 71 and the plurality of rolling shafts 8112 of the rolling shaft member 811, the large friction force prevents the rotation shaft 712 from rotating in the third accommodating portion 8111, and the first left gear 71 can drive the second left gear 81 to rotate, that is, the first left gear 71 and the second left gear 81 rotate coaxially. When the first transmission direction is opposite to the rotation direction of the first left gear 71, a large friction force cannot be formed between the rotation shaft 712 of the first left gear 71 and the plurality of rolling shafts 8112 of the rolling member 811, and then the rotation shaft 712 can rotate in the third accommodating portion 8111, and then the first left gear 71 cannot drive the second left gear 81 to rotate, that is, the first left gear 71 and the second left gear 81 cannot rotate coaxially. For example, when the rotation direction of the first left gear 71 is clockwise, the first transmission direction is also clockwise, a large friction force is formed between the rotating shaft 712 and the plurality of rolling shafts 8112, the large friction force prevents the rotating shaft 712 from rotating in the third accommodating portion 8111, and the first left gear 71 drives the second left gear 81 to rotate coaxially; when the rotation direction of the first left gear 71 is counterclockwise and the first transmission direction is clockwise, a large friction force cannot be formed between the rotating shaft 712 and the plurality of rolling shafts 8112, the rotating shaft 712 rotates in the third accommodating portion 8111, and then the first left gear 71 cannot drive the second left gear 81 to coaxially rotate, and the first left gear 71 rotates relative to the second left gear 81.
In this embodiment, when the first transmission direction is the same as the rotation direction of the first left gear 71, the first one-way bearing set can be regarded as being in a transmission state; when the first transmission direction is opposite to the rotation direction of the first left gear 71, the first one-way bearing group can be regarded as being in an overrunning state; when the transmission state is in the transmission state, the rolling shaft 8112 in the first one-way clutch bearing group is in a static state; when the clutch is in an overrunning state, the rolling shaft 8112 in the first one-way clutch bearing group is in a rolling state. In the present embodiment, the basis for defining the first transmission direction of the first one-way clutch bearing set is whether the first one-way clutch bearing set can make the first left gear 71 and the second left gear 81 rotate coaxially with each other.
As shown in fig. 3 and 4, the base 813 further includes a second tooth structure 814 disposed around the upper side of the base 813, the second tooth structure 814 is located at the upper side of the base 813 adjacent to the first left gear 71, and when the first left gear 71 and the second left gear 81 are overlapped, the first tooth structure 711 is overlapped above the second tooth structure 814. In addition, in another embodiment of the present invention, another independent gear structure may be sleeved outside the base 813, the independent gear structure is fixedly connected to the base 813, and the independent gear structure and the first tooth structure 711 of the first left gear 71 may also be overlapped to each other.
In order to increase the stability of the fixed connection between the base 813 and the metal housing 812, the outer side surface of the metal housing 812 may be provided with a groove 8122, the inner side surface of the base 813 may be provided with a bump 8132, and the groove 8122 and the bump 8132 are combined with each other, so that the fixed connection between the base 813 and the metal housing 812 is more stable.
Further, the structure and the arrangement manner of the first right gear 72 of the third gear set and the second right gear 82 of the fourth gear set in the transmission assembly of the automatic door opener 100 are substantially similar to those of the first left gear 71 and the second left gear 81, and reference may be made to the description of the first left gear 71 and the second left gear 81, which is not repeated herein. The second right gear 82 is meshed with the third right gear 92 in the fifth gear set, a second one-way clutch bearing set is arranged in the second right gear 82, and the structure of the second clutch bearing set is similar to that of the first clutch bearing set. The second one-way clutch bearing set is defined to have a second transmission direction, which is opposite to the first transmission direction, for example, when the first transmission direction is counterclockwise, the second transmission direction is clockwise. Further, when the second transmission direction is the same as the rotation direction of the first right gear 72, the first right gear 72 drives the second right gear 82 to rotate coaxially; when the second transmission direction is opposite to the rotation direction of the first right gear 72, the first right gear 72 cannot drive the second right gear 82 to rotate coaxially, and the first right gear 72 rotates relative to the second right gear 82.
Likewise, when the second transmission direction is the same as the rotation direction of the first right gear 72, the second one-way bearing set may be regarded as being in a transmission state; when the second transmission direction is opposite to the rotation direction of the first right gear 72, the second one-way bearing set can be regarded as in an overrunning state; when the transmission state is carried out, the rolling shaft in the second one-way clutch bearing group is in a static state; and when the clutch is in an overrunning state, the rolling shaft in the second one-way clutch bearing group is in a rolling state. In the present embodiment, the second transmission direction of the second one-way clutch bearing set is defined according to whether the second one-way clutch bearing set can make the first right gear 72 and the second right gear 82 rotate coaxially with each other.
It should be noted that, on the premise that the rotation directions of the first left gear 71 and the first right gear 72 in the transmission assembly are the same, the first transmission direction of the first one-way clutch bearing set is opposite to the second transmission direction of the second one-way clutch bearing set, and the purpose of the present invention is to allow only one of the first set of pushing members and the second set of pushing members of the automatic door opening device 100 to extend or return, but not limited thereto. In other embodiments of the present invention, on the premise that the rotation directions of the first left gear 71 and the first right gear 72 in the transmission assembly are the same, the first transmission direction of the first one-way clutch bearing set is set to be the same as the second transmission direction of the second one-way clutch bearing set, so that the first set of pushing members and the second set of pushing members of the automatic door opening device 100 can be allowed to extend or reset at the same time.
Fig. 6 is an exploded view of the first link and the first push rod of the automatic door opener of the present invention.
As shown in fig. 2, 3 and 6, the automatic door opening device 100 includes pushing members, the pushing members include a first group of pushing members and a second group of pushing members, the first group of pushing members and the second group of pushing members have similar structures, the first group of pushing members includes a first connecting rod 201 and a first push rod 301 that are pivoted to each other, the second group of pushing members includes a second connecting rod 202 and a second push rod 302 that are pivoted to each other, wherein the first connecting rod 201 is coupled to the third left gear 91, and the second connecting rod 301 is coupled to the third right gear 92.
The structure and connection mode of the first link 201 and the first push rod 301 of the first set of pushing elements will be taken as an example to describe the actuating process of the pushing elements of the automatic door opening device 100, wherein the structure, connection mode and actuating process of the second link 202 and the second push rod 302 of the second set of pushing elements can refer to the description of the first set of pushing elements and will not be described again.
Specifically, the first link 201 has a first pivot hole 2011 and a second pivot hole 2012, and preferably, the first pivot hole 2011 and the second pivot hole 2012 are respectively disposed at two opposite ends of the first link 201. The first push rod 301 includes a first push rod body 3011, a first pivot axis 3012 and a first sliding portion 3013, the first pivot axis 3012 is located between the first push rod body 3011 and the first sliding portion 3013, wherein the first push rod body 3011 extends from one side of the first pivot axis 3012 toward a first direction, the first sliding portion 3013 extends from the other side of the first pivot axis 3012 toward a second direction, and the first direction is opposite to the second direction. The third left gear 91 is provided with a second pivot shaft 911, and the second pivot shaft 911 is located on a first surface of the third left gear 91 facing the first casing 10 and protrudes from the first surface. The first pivot axis 3012 is inserted into the first pivot hole 2011, and the second pivot axis 911 is inserted into the second pivot hole 2012, so that two opposite ends of the first link 201 are respectively pivoted to the third left gear 91 and the first push rod 301.
With reference to fig. 2, 3 and 5, the second housing 20 is provided with a first sliding slot 601 corresponding to the first sliding portion 3013 of the first push rod 301, and the first sliding portion 3013 slides in the first sliding slot 601 in the process that the first push rod 301 extends out or returns along the opening. The arrangement of the first sliding portion 3013 and the first sliding slot 601 can increase the moving stability of the first push rod 301 in the process of extending or resetting, that is, under the action of the first sliding slot 601 and the first sliding portion 3013, the first push rod 301 can only move linearly without rotating, so as to improve the stability of pushing the door body of the refrigerator by the pushing piece of the automatic door opening device 100.
In order to increase the smoothness of the sliding of the first sliding portion 3013 in the first sliding slot 601, the first push rod body 3011 is connected to the middle region of the first pivot axis 3012, the first sliding portion 3013 is disposed adjacent to the end of the first pivot axis 3012, the first sliding portion 3013 is accommodated in the first sliding slot 601, and the first push rod body 3011 is substantially suspended above the first sliding slot 601 without contacting the slot wall of the sliding slot 601.
In addition, a gap is formed between the third left gear 91 facing the second surface of the second housing 20 and the bottom surface of the second housing 21, when the first sliding portion 3013 drives the first push rod body 3011 to return, the first sliding portion 3013 can partially enter the gap, the far side of the first sliding slot 601 is communicated with the gap, and the near side of the first sliding slot 601 is stopped by the side wall of the second housing 20 to prevent the first sliding portion 3013 from sliding out of the second housing 20. The near side of the first sliding chute 601 is a side close to the user, the far side of the first sliding chute 601 is a side far from the user, and the side wall of the second housing 20 is a peripheral wall formed by extending from the periphery of the bottom surface of the second housing 20 towards the direction of the first housing 10.
Referring to fig. 2, when the third left gear 91 is driven by the second left gear 81 to rotate clockwise, the second pivot shaft 911 moves clockwise along with the rotation of the third left gear 91 to push the first link 201, and the first link 201 continues to push the first push rod 301 to protrude from the opening. When the first push rod 301 needs to be retracted from the opening for resetting, the third gear 91 is driven to continue to rotate in the clockwise direction, and the first link 201 continues to move in the clockwise direction; alternatively, the third gear 91 is driven to rotate in the counterclockwise direction, and the first link 201 moves in the counterclockwise direction; the first push rod 301 is pulled by the first connecting rod 201 to move and reset towards the inside of the shell. In the process of extending and returning the first push rod 301, the first sliding portion 3013 reciprocates in the sliding slot 601 (as shown in fig. 3 and 6), so as to limit the first push rod 301 to move only linearly under the action of the first link 201.
In the process that the first push rod 301 extends out of the opening of the outer shell to perform door opening operation, the first connecting rod 201 moves along with the rotation of the third left gear 91, so that the first push rod 301 is pushed out and reset, the effective moment of the first push rod 301 acting on the door body of the refrigerator is increased and then reduced, namely, after the automatic door opening device starts 100, the effective moment is increased rapidly, the door opening resistance is overcome, the door body of the refrigerator is opened, the effective moment is gradually reduced, and the door body of the refrigerator is slowly opened to a larger angle. In the present embodiment, the structure formed by the third left gear 91, the first link 201, and the first push rod 301 may be regarded as a "crank link structure".
Because the first link 201 is pivotally connected to the third left gear 91, the third left gear 91 can rotate clockwise or counterclockwise as a circular motion, and therefore, the first link 201 is driven by the third left gear 91 to move along the circular direction. That is, in the present invention, when the first push rod 301 is extended or reset, the third left gear 91 rotates along the first circumferential direction, so as to drive the first link 201 to move along the first circumferential direction, and further push the first push rod 301 pivoted thereto to extend from the opening of the housing; when the first push rod 301 is located at the maximum extending position, the third left gear 91 is controlled to rotate along the second circumferential direction, so as to drive the first link 201 to move along the second circumferential direction, so as to pull the first push rod 301 located at the maximum extending position to move towards the inside of the housing, and thus the first push rod 301 is reset. Wherein the first circumferential direction and the second circumferential direction may be the same or different.
It should be noted that in the automatic door opening device 100 of the present invention, the second left gear 81 of the fourth gear set is provided with the first one-way clutch bearing set, and the first transmission direction of the first one-way clutch bearing set is the same as the rotation direction of the first left gear 71, so that the second left gear 81 and the first left gear 71 are always in coaxial rotation, in this case, the third left gear 91 needs to continuously rotate along the same circumferential direction to drive the first connecting rod 201 to move along the circumferential direction, so as to achieve the extension and the return of the first push rod 301. In other embodiments of the present invention, the first left gear can rotate along the first circumferential direction to drive the first link to move along the first circumferential direction, so as to push the first push rod pivoted with the first left gear to extend out of the opening of the housing; when the first push rod is located at the maximum extending position, the driving assembly is controlled to drive reversely, the transmission assembly enables the first left gear to rotate along the second circumferential direction, the first connecting rod is driven to move along the second circumferential direction, and then the first push rod pivoted with the first connecting rod is pulled to retract and reset from the opening of the shell, wherein the first circumferential direction is opposite to the second circumferential direction. Preferably, the first left gear and the second left gear can rotate coaxially in both the first circumferential direction and the second circumferential direction, for example, the first left gear and the second left gear are a structure of a main gear and a sub gear which are coaxially arranged.
The automatic door opening device 100 of the present invention will be described in detail below with reference to the accompanying drawings, wherein the cooperation of the first to fifth gear sets in the transmission assembly, and particularly the arrangement of the third gear set and the fourth gear set ("the first one-way clutch bearing set" and the second one-way clutch bearing set "), enables one of the first push rod 301 and the second push rod 302 to extend out of the housing during the operation of opening the door body of the refrigerator by the pushing member, and is particularly suitable for a refrigerator with a plurality of door bodies, and only one of the door bodies needs to be opened, or the door bodies need to be opened sequentially.
Referring to fig. 2 and 3, when the control board 30 of the automatic door opening device 100 receives a door opening signal, the control board 30 sends a signal to the driving assembly 40, the driving assembly 40 is activated, the driving assembly 40 includes a driving motor, a worm 41 of the driving motor rotates, the worm 41 is driven by the driving motor to forward, so that the first main gear 52 of the first gear set 50 engaged with the worm 41 rotates, for example, in a counterclockwise direction, the first sub gear 51 of the first gear set 50 is coaxially disposed with the first main gear 52, and the first sub gear 51 rotates in the same direction as the first main gear 52, that is, in the counterclockwise direction; the first sub gear 51 is engaged with the second main gear 61 of the second gear set 60, the first sub gear 51 rotates counterclockwise such that the second main gear 61 rotates in a clockwise direction, and the second sub gear 62 also rotates in the same direction, i.e., clockwise direction, due to the second sub gear 62 of the second gear set 60 being coaxially disposed with the second main gear 61; the second sub gear 62 simultaneously engages a pair of first left gear 71 and first right gear 72 of the third gear set, the first left gear 71 and the first right gear 72 are symmetrically disposed with respect to the second sub gear 62, and the second sub gear 62 rotates in a clockwise direction such that the first left gear 71 and the first right gear 72 rotate in a counterclockwise direction, respectively.
The fourth gear set includes a pair of second left gear 81 and second right gear 82, the second left gear 81 and the second right gear 82 respectively correspond to the first left gear 71 and the first right gear 72 one-to-one, wherein a first one-way clutch bearing set is disposed in the second left gear 81, a second one-way clutch bearing set is disposed in the second right gear 82, a first transmission direction of the first one-way clutch bearing set is opposite to a second transmission direction of the second one-way clutch bearing set, for example, the transmission direction of the first one-way clutch bearing set is counterclockwise, and the transmission direction of the second one-way clutch bearing set is clockwise. When the first left gear 71 rotates in the counterclockwise direction, the rotation direction (counterclockwise direction) of the first left gear 71 is the same as the transmission direction (counterclockwise direction) of the first one-way clutch bearing set in the corresponding second left gear 81, that is, a large friction force is formed between the rotation shaft 711 of the first left gear 71 and the rolling shaft 8112 of the rolling member 811 of the first one-way clutch bearing set, the rotation shaft 711 is prevented from rotating in the third accommodating portion 8111 by the large friction force, and the first left gear 71 drives the second left gear 81 to coaxially rotate together in the counterclockwise direction. When the first right gear 72 rotates in the counterclockwise direction, since the second transmission direction of the second one-way clutch bearing set disposed in the second right gear 82 is opposite to the first transmission direction, and the rotation direction of the first right gear 72 is the same as the rotation direction of the first left gear 71, the rotation direction (counterclockwise direction) of the first right gear 72 is opposite to the second transmission direction (clockwise direction) of the second one-way clutch bearing set in the corresponding second right gear 82, that is, the rotation shaft (not shown) of the first right gear 72 cannot form a large friction with the rolling shaft in the rolling member of the second one-way clutch bearing set, the rotation shaft of the first right gear 72 can rotate relative to the second one-way clutch bearing set, that is, the first right gear 72 cannot drive the second right gear 82 to rotate coaxially, and the second right gear 82 is in a stationary state.
Because the first left gear 71 can drive the second left gear 81 to rotate along the counterclockwise direction, the second left gear 81 is meshed with the third left gear 91, the third left gear 91 rotates clockwise under the driving of the second left gear 81, the third left gear 91 rotates clockwise, and drives the first link 201 to move clockwise, so that the first link 201 pushes the first push rod 301, and further the first push rod 301 extends out from the openings of the first shell 10 and the second shell 20 to push against the door body of the refrigerator, so that the door body of the refrigerator is pushed open. With the continuous clockwise rotation of the third left gear 91, the first push rod 301 is pushed to the maximum position by the first link 201, the positive rotation of the worm 41 of the driving assembly 40 is maintained, the third left gear 91 continues to rotate clockwise to drive the first link 201 to pull the first push rod 301 to reset, after the first push rod 301 is reset, one end of the first link 201 abuts against the first micro-control switch 501, the first micro-control switch 501 is triggered, the first processor 401 connected to the first micro-control switch 501 sends a stop signal, and the driving assembly 40 stops working.
In the above embodiment, the worm 41 of the driving assembly 40 rotates forward to drive the first gear set 50 to rotate counterclockwise, the second gear set 60 rotates clockwise, the first left gear 71 and the first right gear 72 in the third gear set rotate counterclockwise, the first transmission direction of the first one-way clutch bearing set of the second left gear 81 in the fourth gear set is counterclockwise, and the second transmission direction of the second one-way clutch bearing set of the second right gear 82 in the fourth gear set is clockwise. The first transmission direction of the first one-way clutch bearing set is the same as the rotation direction of the first left gear 71, so that the first left gear 71 and the second left gear 81 rotate coaxially, and further the third left gear 91 is driven to rotate clockwise to drive the first connecting rod 201 to push the first push rod 301 to extend out; the second transmission direction of the second one-way clutch bearing set is opposite to the rotation direction of the first right gear 72, so that the first right gear 72 rotates relative to the second one-way clutch bearing set in the second right gear 82, the first right gear 72 cannot rotate coaxially with the second right gear 82, the second right gear 82 does not rotate, the third right gear 92 does not rotate, and the second connecting rod 202 cannot push the second push rod 302 to prevent the second push rod from extending out of the housing.
Of course, if the second push rod 302 of the automatic door opener 100 is controlled to extend out of the opening of the housing, a coaxial rotation is required to be formed between the first right gear 72 and the second right gear 82, at this time, by changing the rotation direction of the worm 41 of the driving assembly 40, for example, the worm 41 is reversed to drive the first gear set 50 to rotate clockwise, the second gear set 60 rotates counterclockwise, the first left gear 71 and the first right gear 72 of the third gear set both rotate clockwise, the first transmission direction of the first one-way clutch bearing of the second left gear 81 disposed in the fourth gear set is counterclockwise, the second transmission direction of the second one-way clutch bearing set of the second right gear 82 disposed in the fourth gear set is clockwise, therefore, the rotation direction of the first left gear 71 is opposite to the transmission direction of the first one-way clutch bearing, the first left gear 71 rotates relative to the first one-way clutch bearing set of the second left gear 81, the first left gear 71 and the second left gear 81 can not coaxially rotate, the second left gear 81 can not rotate, the third left gear 91 can not rotate, and the first connecting rod 201 can not push the first push rod 301 to enable the first push rod to not extend out of the shell; the rotation direction (clockwise direction) of the first right gear 72 is the same as the second transmission direction (clockwise direction) of the second one-way clutch bearing set, the first right gear 72 and the second right gear 82 rotate coaxially, so that the second right gear 82 drives the third right gear 92 to rotate counterclockwise, the third right gear 92 drives the second connecting rod 202 to move, and the second connecting rod 202 pushes the second push rod 302 to extend out from the opening of the housing. After the second push rod 302 extends to the maximum position, the third right gear 92 continues to rotate counterclockwise to drive the second connecting rod 202 to move, the second connecting rod 202 pulls the second push rod 302 to reset, when the second push rod 302 is reset, one end of the second connecting rod 202 triggers the second micro switch 502, the second micro switch 502 is triggered, the second processor 402 connected with the second micro switch 502 sends a stop signal, and the driving assembly 40 stops working.
It should be noted that, the forward rotation and the reverse rotation of the driving assembly 40 are taken as an example to describe the extending and returning process of one of the first push rod 301 and the second push rod 302, and by means of the first transmission direction of the first one-way clutch bearing set in the second left gear 81 in the fourth gear set being opposite to the second transmission direction of the second one-way clutch bearing set in the second right gear 82, so that one of the first left gear 71 and the first right gear 72 in the third gear set and the corresponding second left gear 81 and second right gear 82 form coaxial rotation, to drive one of the third left gear 91 and the third right gear 92 in the fifth gear set to rotate, so that one of the third gear 91 and the third right gear 92 drives one of the first link 201 and the second link 202, so that one of the first push rod 301 and the second push rod 302 protrudes from the opening of the housing. Wherein, because only one driving assembly 40 is used, the working noise of the automatic door opener can be effectively reduced.
Furthermore, due to the mutual connection among the fifth gear set, the first connecting rod, the second connecting rod, the first push rod and the second push rod, when the first push rod and the second push rod extend out of the opening of the shell, effective moment is increased rapidly, door opening resistance is overcome, the door body of the refrigerator is opened, the effective moment is gradually reduced, the door body is opened to a larger angle slowly, the fact that the door body is not easy to collide with a user in the opening process is guaranteed, and the use comfort of the user is improved.
As shown in fig. 7, the present invention further provides a refrigerator 200, wherein the refrigerator 200 is provided with the above-mentioned automatic door opening device 100 (not shown), and the automatic door opening device 100 can be disposed at different positions of the refrigerator 200 according to requirements, for example, the top a region and the bottom B region of the refrigerator 200, or the middle C region of the refrigerator 200, and the automatic door opening device 100 can be disposed at the same time in the regions a to C, or at least one of them is disposed.
In summary, according to the automatic door opener and the refrigerator thereof, when the automatic door opener is used as a double-rod automatic door opener, the transmission assembly is provided with the first one-way clutch bearing group and the second one-way clutch bearing group, and one of the two gears respectively connected with the first one-way clutch bearing group and the second one-way clutch bearing group is driven by controlling the first transmission direction of the first one-way clutch bearing group to be opposite to the second transmission direction of the second one-way clutch bearing group, so that one of the two push rods is extended or reset. In addition, when the first transmission direction of controlling the first one-way clutch bearing group is the same as the second transmission direction of the second one-way clutch bearing group, the two gears respectively connected with the first one-way clutch bearing group and the second one-way clutch bearing group are driven at the same time, and then the two push rods are stretched out or reset at the same time. In the double-rod automatic door opening device, the extension or the reset of the push rod can be completed only by one driving motor, so that the working noise can be reduced.
Furthermore, the connecting rod pin joint gear and push rod simultaneously in the impeller, and the connecting rod carries out the circumferencial direction along with the rotation of gear and removes, and then promotes the push rod and stretch out or reset, wherein for the push rod is opening the door in-process, and effective moment diminishes after increasing earlier gradually, and the door body can be opened slowly, has realized that the in-process that the door body was opened is difficult for hitting the user, has improved user's comfort level.
The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.

Claims (11)

1. The utility model provides an automatic door opener for automatically, open the door body of refrigerator, its includes the shell, is fixed in the drive assembly of this shell for the impeller of opening this door body and set up the drive assembly between this drive assembly and this impeller, its characterized in that, this drive assembly includes:
a first gear set including a first main gear and a first sub-gear which are coaxially disposed;
the second gear set comprises a second main gear and a second sub gear which are coaxially arranged;
a third gear set including a first left gear and a first right gear;
the fourth gear set comprises a second left gear, and a first one-way clutch bearing set is arranged in the second left gear; and
a fifth gear set including a third left gear, the third left gear being connected to the first set of pushers of the pushers, and the third left gear meshing with the second left gear;
wherein the first main gear is engaged with the driving assembly, the first sub-gear is engaged with the second main gear, the second sub-gear is located between the first left gear and the first right gear, and the second sub-gear is engaged with the first left gear and the first right gear simultaneously;
the first left gear is overlapped on the second left gear, and a rotating shaft of the first left gear enters the first one-way clutch bearing set; when the first transmission direction of the first one-way clutch bearing set is the same as the rotation direction of the first left gear, the first left gear and the second left gear rotate coaxially, the second left gear drives the third left gear, and the third left gear drives the first set of pushing pieces to extend out of or reset from the shell; when the first transmission direction of the first one-way clutch bearing set is opposite to the rotation direction of the first left gear, the first left gear rotates relative to the second left gear.
2. The automatic door opening device of claim 1,
the fourth gear set also comprises a second right gear, a second one-way clutch bearing set is arranged in the second right gear, the first right gear is overlapped on the second right gear, and a rotating shaft of the first right gear enters the second one-way clutch bearing set; the fifth gear set also comprises a third right gear, the third right gear is connected with the second group of pushing pieces of the pushing pieces, and the third right gear is meshed with the second right gear; when the second transmission direction of the second one-way clutch bearing group is the same as the rotation direction of the first right gear, the first right gear and the second right gear rotate coaxially, the second right gear drives the third right gear, and the third right gear drives the pushing piece to extend out of or reset from the shell; when the second transmission direction of the second one-way clutch bearing group is opposite to the rotation direction of the first right gear, the first right gear rotates relative to the second right gear.
3. The automatic door opener according to claim 2, wherein the first driving direction of the first one-way clutch bearing set is opposite to the second driving direction of the second one-way clutch bearing set, so that the first set of urging members or the second set of urging members are protruded or restored from the housing.
4. The automatic door opener according to claim 3, wherein the first set of pushing members comprises a first link and a first push rod, and both ends of the first link are pivotally connected to the third left gear and the first push rod, respectively.
5. The automatic door opener according to claim 4, wherein the third left gear rotates to drive the first link to move, the first link drives the first push rod to extend or reset, after the first push rod is reset, the end of the first link triggers the first micro-control switch in the housing, the first micro-control switch is triggered, the first processor connected to the first micro-control switch sends a stop signal, and the driving assembly stops working.
6. The automatic door opener according to claim 4, wherein the second set of pushing members comprises a second link and a second push rod, and both ends of the second link are pivotally connected to the third right gear and the second push rod, respectively.
7. The automatic door opener according to claim 6, wherein the third right gear rotates to drive the second link to move, the second link drives the second push rod to extend or reset, after the second push rod is reset, the end of the second link triggers a second micro-control switch in the housing, the second micro-control switch is triggered, a second processor connected to the second micro-control switch sends a stop signal, and the driving assembly stops working.
8. The automatic door opening device as claimed in claim 2, wherein the first right gear set and the first left gear set are symmetrically disposed about the second gear set.
9. The automatic door opening device according to claim 2, wherein the first gear set comprises a first main gear and a first sub-gear coaxially disposed, and the second gear set comprises a second main gear and a second sub-gear coaxially disposed, wherein the first main gear engages with the driving assembly, the first sub-gear engages with the second main gear, the second sub-gear is located between the first left gear and the first right gear, and the second sub-gear simultaneously engages with the first left gear and the first right gear.
10. The automatic door opener according to claim 9, wherein the driving assembly includes a driving motor and a worm gear extending from an output end of the driving motor, the worm gear engaging the first main gear.
11. A refrigerator comprising the automatic door opening apparatus according to any one of claims 1 to 10.
CN201811513373.3A 2018-12-11 2018-12-11 Automatic door opening device and refrigerator with same Active CN109826926B (en)

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Family Cites Families (7)

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Publication number Priority date Publication date Assignee Title
JP3604947B2 (en) * 1999-04-07 2004-12-22 株式会社三協精機製作所 Motion assist device and door opening / closing mechanism
JP3591628B2 (en) * 1999-05-12 2004-11-24 株式会社三協精機製作所 Motion assist device and motion assist device for refrigerator
KR101639435B1 (en) * 2009-10-13 2016-07-13 엘지전자 주식회사 Refrigerator
CN105971439B (en) * 2016-06-24 2018-01-16 合肥华凌股份有限公司 Enabling motor component, automatic door opening system and method for work, refrigerator
CN106766592B (en) * 2016-12-27 2018-05-15 青岛海尔股份有限公司 Automatic door operator and the refrigerator with the device
CN107421221A (en) * 2017-05-27 2017-12-01 宁波力泰电子科技有限公司 A kind of automatic door operator of side by side combination refrigerator
CN108679913A (en) * 2018-07-10 2018-10-19 长虹美菱股份有限公司 A kind of transmission device and its control system for refrigerator automatic opening and closing door

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