CN111317422A

CN111317422A - Lifting device and household appliance

Info

Publication number: CN111317422A
Application number: CN201811536763.2A
Authority: CN
Inventors: 沈毅; 王清川; 蔡思琦; 关向新; 黄江远
Original assignee: Midea Group Co Ltd; Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2018-12-14
Filing date: 2018-12-14
Publication date: 2020-06-23

Abstract

The invention discloses a lifting device and a household appliance. The lifting assembly is arranged on the base and is rotationally connected with the base, the bearing object assembly is arranged on the lifting assembly, and the lifting assembly can be unfolded and contracted. The electric driving assembly is connected with the lifting assembly and is configured to drive the lifting assembly to rotate relative to the base so as to drive the lifting assembly to expand to drive the carrying object assembly to ascend and drive the lifting assembly to contract so as to drive the carrying object assembly to descend; or the lifting component is driven to rotate relative to the base so as to drive the lifting component to expand to drive the bearing object component to descend, and the lifting component is driven to contract to drive the bearing object component to ascend. So, electric drive assembly can drive lifting unit to expand or contract in order to drive the carrier subassembly and rise, also can drive lifting unit to contract or expand in order to drive the carrier subassembly and descend, need not the user and carries out manual and bow operation.

Description

Lifting device and household appliance

Technical Field

The invention relates to the technical field of household appliances, in particular to a lifting device and a household appliance.

Background

At present, the door opening mode of the household dish washing machine generally comprises a drawer type, a pull-down door type and a flip type, in most household dish washing machines, a bowl basket does not have a lifting function in the vertical direction, a user needs to execute a stooping action at every time to realize the putting in and taking out of tableware, and great inconvenience is brought to daily life.

In the related art, the bowl basket lifting device is adopted to realize the lifting function of the bowl basket in the vertical direction, the bowl basket lifting device has the function of changing the relative height between the lower end of the bowl basket and the lower end of the inner container through the lifting assembly, and the bowl basket lifting device used at present generally needs to manually lift the bowl basket. Although the dishes can be placed and removed without bending down, the bending down operation is still required during the process of lifting and lowering the basket.

In addition, when putting into more tableware in the bowl basket, the user needs great strength just can promote the bowl basket, like this, has reduced user experience.

Disclosure of Invention

The invention provides a lifting device and a household appliance.

The lifting device of the embodiment of the invention comprises:

a carrier assembly;

a base;

the lifting assembly is arranged on the base, the bearing object assembly is arranged on the lifting assembly and is rotationally connected with the lifting assembly, the lifting assembly is rotationally connected with the base, and the lifting assembly can be unfolded and contracted; and

an electric drive assembly connected to the lifting assembly, the electric drive assembly configured to drive the lifting assembly to rotate relative to the base to drive the lifting assembly to expand to drive the carrier assembly to ascend and to drive the lifting assembly to contract to drive the carrier assembly to descend; or

The electric driving assembly is configured to drive the lifting assembly to rotate relative to the base to drive the lifting assembly to expand to drive the carrier assembly to descend, and to drive the lifting assembly to contract to drive the carrier assembly to ascend.

The lifting device of the embodiment can drive the lifting component to expand or contract through the electric drive component so as to drive the bearing object component to ascend, and can also drive the lifting component to contract or expand so as to drive the bearing object component to descend, so that a user does not need to perform manual operation and stoop operation, and the user experience is improved.

In some embodiments, the carrier assembly includes a carrier and a holder, the carrier is disposed on the holder, and the holder is rotatably coupled to the lifting assembly.

In some embodiments, the lifting assembly includes two first gear links and two second gear links respectively rotatably connected to the two first gear links, the two first gear links are each formed with a first gear portion, the two first gear portions are engaged with each other and are respectively rotatably connected to the base, the two second gear links are each rotatably connected to the carrier assembly, and the electric driving assembly is connected to one of the two first gear portions.

In some embodiments, the electric drive assembly includes a motor having a motor shaft coupled to one of the two first gear portions.

In some embodiments, the lifting assembly includes two first gear links and two second gear links rotatably connected to the two first gear links, respectively, the two first gear links each have a first gear portion formed thereon, the two first gear portions are engaged with each other and rotatably connected to the base, respectively, and the electric driving assembly is connected to one of the two first gear portions;

lifting unit still include two third gear connecting rods and respectively with two fourth gear connecting rods that two third gear connecting rods rotate and connect, two second gear connecting rods are formed with second gear portion, two third gear connecting rods all are formed with third gear portion, two second gear portion intermeshing and respectively with two third gear portion meshing, two third gear portion intermeshing and respectively with two second gear portion meshing, two fourth gear connecting rods all with the carrier subassembly rotates and connects.

In some embodiments, the lifting assembly further includes a supporting seat, and the two second gear portions and the two third gear portions are disposed on the supporting seat and rotatably connected to the supporting seat.

In some embodiments, the two fourth gear links are each formed with a fourth gear portion, the two fourth gear portions being intermeshed, both fourth gear portions being rotationally coupled to the carrier assembly.

In some embodiments, the number of the base, the lifting assembly and the electric driving assembly is two and the two are respectively symmetrically disposed at two sides of the carrier assembly.

The household appliance comprises a cavity and the lifting device of any one embodiment, wherein the lifting device is arranged in the cavity.

The household appliance of the embodiment can drive the lifting assembly to expand or contract through the electric driving assembly so as to drive the bearing object assembly to ascend, and can also drive the lifting assembly to contract or expand so as to drive the bearing object assembly to descend, so that a user does not need to perform manual operation and stoop operation, and the user experience is improved.

In some embodiments, the carrier assembly gradually protrudes from the cavity during the process that the electric driving assembly drives the lifting assembly to rotate relative to the base to drive the lifting assembly to expand or contract to drive the carrier assembly to ascend;

when the electric driving assembly drives the lifting assembly to rotate relative to the base so as to drive the lifting assembly to contract or expand to drive the bearing object assembly to descend, the bearing object assembly is gradually retracted into the cavity.

In some embodiments, the carrier assembly comprises a bowl and basket assembly.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a home appliance according to an embodiment of the present invention;

fig. 2 is another structural schematic diagram of the home appliance according to the embodiment of the present invention;

FIG. 3 is a schematic structural view of a lifting device according to an embodiment of the present invention;

FIG. 4 is another schematic structural view of the lifting device according to the embodiment of the present invention;

FIG. 5 is a schematic view of another construction of the lifting device according to the embodiment of the present invention;

fig. 6 is a further structural schematic view of the lifting device of the embodiment of the present invention;

fig. 7 is an enlarged schematic view at VII in fig. 4.

Description of the main element symbols:

the household appliance comprises a household appliance 100, a lifting device 10, a bearing component 11, a bearing 111, a holder 112, a base 12, a lifting component 13, a first gear link 131, a first gear part 1311, a second gear link 132, a second gear part 1321, a third gear link 133, a third gear part 1331, a fourth gear link 134, a fourth gear part 1341, a support seat 135, an electric drive component 14, a motor 141, a connecting part 15, a limiting part 16, a fixing part 17, a cavity 20, a body 30 and a guide rail component 40.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. 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 by those skilled in the art according to specific situations.

Referring to fig. 1 to 3, a lifting device 10 according to an embodiment of the present invention includes a carrier assembly 11, a base 12, a lifting assembly 13, and an electric driving assembly 14. The base 12 is located below the carrying object assembly 11, the lifting assembly 13 is disposed on the base 12, and the carrying object assembly 11 is disposed on the lifting assembly 13 and rotatably connected with the lifting assembly 13. The lifting assembly 13 is also rotatably connected with the base 12, and the lifting assembly 13 can be unfolded and retracted. The electric driving assembly 14 is connected to the lifting assembly 13, and the electric driving assembly 14 is configured to drive the lifting assembly 13 to rotate relative to the base 12 to drive the lifting assembly 13 to expand to drive the carrier assembly 11 to ascend, and to drive the lifting assembly 13 to contract to drive the carrier assembly 11 to descend.

The above-described lifting device 10 is used for the home appliance 100 of the embodiment of the present invention. The household appliance 100 is, for example, a drawer dishwasher. The household appliance 100 comprises a cavity 20, and the lifting device 10 is disposed in the cavity 20, generally, the lifting device 10 is fixedly mounted on the cavity 20 through the base 12, that is, the base 12 and the cavity 20 are fixedly connected. During the process that the electric driving assembly 14 drives the lifting assembly 13 to rotate relative to the base 12 to drive the lifting assembly 13 to unfold and lift the carrier assembly 11, the carrier assembly 11 gradually extends out of the cavity 20. During the process that the electric driving assembly 14 drives the lifting assembly 13 to rotate relative to the base 12 to drive the lifting assembly 13 to contract so as to lift the carrier assembly 11, the carrier assembly 11 is gradually retracted into the cavity 20.

In the illustrated embodiment, the electric drive assembly 14 is mounted near the bottom of the cavity 20 such that the lifting assembly 13 is driven by the electric drive assembly 14 to extend and the carrier assembly 11 is driven to rise and the lifting assembly 13 is driven by the electric drive assembly 14 to retract and the carrier assembly 11 is driven to fall.

It is understood that in other embodiments, the electric driving assembly 14 can also be configured to drive the lifting assembly 13 to rotate relative to the base 12 to drive the lifting assembly 13 to extend to drive the carrier assembly 11 to descend, and to drive the lifting assembly 13 to retract to drive the carrier assembly 11 to ascend, without limitation. Specifically, the electric driving assembly 14 can be installed near the top of the cavity 20, and the electric driving assembly 14 and the base 12 are located above the carrier assembly 11, such that the carrier assembly 11 is driven to descend when the electric driving assembly 14 drives the lifting assembly 13 to expand, and the carrier assembly 11 is driven to ascend when the electric driving assembly 14 drives the lifting assembly 13 to contract. During the process that the electric driving assembly 14 drives the lifting assembly 13 to contract to drive the carrying object assembly 11 to ascend, the carrying object assembly 11 gradually extends out of the cavity 20, and during the process that the electric driving assembly 14 drives the lifting assembly 13 to expand to drive the carrying object assembly 11 to descend, the carrying object assembly 11 gradually retracts into the cavity 20.

The lifting device 10 and the household appliance 100 of the above embodiment can drive the lifting assembly 13 to expand or contract through the electric driving assembly 14 to drive the carrying object assembly 11 to ascend, and can also drive the lifting assembly 13 to contract or expand to drive the carrying object assembly 11 to descend, so that a user does not need to perform manual operation and stooping operation, and user experience is improved.

Specifically, in the present embodiment, the upper end of the lifting assembly 13 is rotatably connected to the carrier assembly 11, and the lower end of the lifting assembly 13 is rotatably connected to the base 12 and is fixedly connected to the electric driving assembly 14. When the electric driving assembly 14 drives the lower end of the lifting assembly 13 to rotate relative to the base 12, the lifting assembly 13 can be unfolded or folded, so as to drive the carrier assembly 11 to ascend or descend.

Referring to fig. 3, in the above embodiment, the carrying object assembly 11 includes a carrying object 111 and a holding frame 112, the carrying object 111 is disposed on the holding frame 112, and the holding frame 112 is rotatably connected to the lifting assembly 13.

Thus, the holder 112 can ensure the stability of the carrier 111 when the carrier 111 ascends or descends, and prevent the carrier 111 from shaking too much, thereby avoiding the phenomenon of instability and even falling.

Specifically, as shown in fig. 3 and 4, in the present embodiment, the holder 112 is rotatably connected to the lifting assembly 13. When the lifting component 13 rotates relative to the holder 112, the lifting component 13 can drive the holder 112 to ascend or descend. It is understood that, in some examples, the lifting device 10 may be configured without the holder 112 by directly matching the carrying object 111 with the lifting assembly 13, and the two are directly connected in a rotating manner, so long as the carrying object 111 can be kept in a stable state.

It should be noted that the carrier 111 can be used for holding articles to be placed in the household appliance 100. For example, for a dishwasher, the carrier 111 may be a basket for bowls, cutlery, chopsticks, etc. For a disinfection cabinet, the carrier 111 may be a container for placing the items to be disinfected.

Referring to fig. 1 and 2, in an example, the household appliance 100 is a dishwasher, the cavity 20 is a liner of the dishwasher, in the example shown in fig. 1 and 2, the dishwasher further includes a body 30 and a rail assembly 40, the rail assembly 40 connects the liner and the body 30, the liner can slide out of or into the body 30 through the rail assembly 40, and the base 12 of the lifting device 10 is fixedly mounted on the liner. In this embodiment, when a user needs to wash dishes, the user first pulls the inner container out of the body 30, and then the electric driving unit 14 drives the lifting unit 13 to rotate relative to the base 12 to drive the lifting unit 13 to unfold, so as to drive the holder 112 and the loaded object 111 to ascend, and after the lifted object reaches the highest point, the electric driving unit 14 stops driving, and the user places the dishes on the loaded object 111. Then, the electric driving assembly 14 drives the lifting assembly 13 to rotate again relative to the base 12 to drive the lifting assembly 13 to contract, so as to drive the holder 112 and the load-bearing object 111 to descend, until the load-bearing object 111 retracts to the inner container (i.e. descends to the lowest point), the electric driving assembly 14 stops driving, at this time, the user can push the inner container into the body 30 to start washing. The working process of taking and placing the tableware after washing is similar to the above process, and will not be repeated herein. It is understood that in other examples, the household appliance 100 may also be a washing machine, a disinfection cabinet, or the like. It can also be understood that in the present embodiment, the lifting device 10 is installed on the inner container, and when the inner container slides out or pushes out the body 30, the lifting device 10 will also slide out or push out the body 30 along with the inner container.

In the above embodiment, the motor 141 of the electric driving assembly 14 is mounted outside the cavity 20. Specifically, the motor 141 is mounted on the outer surface of the sidewall of the cavity 20 by a fixing member 17, and the fixing member 17 may be a bolt or the like for fixing the connection. So, can guarantee that motor 141 sets up outside cavity 20, realize the water and electricity separation, optimize the water and electricity overall arrangement, can prevent that the water in the cavity 20 from splashing into motor 141 and causing motor 141 trouble.

Referring to fig. 3 to 4, in some embodiments, the number of the base 12, the lifting assembly 13 and the electric driving assembly 14 is two, and the two are respectively disposed on two symmetrical sides of the carrier assembly 11. The two lifting assemblies 13 are respectively connected with the two bases 12 in a rotating manner, meanwhile, the two lifting assemblies 13 are both connected with the bearing object assembly 11 in a rotating manner, and the two electric driving assemblies 14 are connected with the two lifting assemblies 13.

Therefore, the synchronous lifting of the bearing object 111 can be realized, and the stability of the bearing object 111 during lifting and descending is ensured.

It is understood that, in the above embodiment, the number of the holders 112 of the carrier assembly 11 connected to the lifting assembly 13 is also two, and the two holders 112 are respectively rotatably connected to the two lifting assemblies 13.

In one embodiment, the lifting assembly 13 includes two first gear links 131 and two second gear links 132 respectively rotatably connected to the two first gear links 131, the two first gear links 131 are respectively formed with first gear portions 1311, the two first gear portions 1311 are engaged with each other and respectively rotatably connected to the base 12, the two second gear links 132 are respectively rotatably connected to the carrier assembly 11, and the electric driving assembly 14 is connected to one of the two first gear portions 1311.

Specifically, in the present embodiment, two first gear links 131 are respectively disposed at two symmetrical sides of the base 12 and are both rotatably connected to the base 12. The two second gear links 132 are also disposed on two symmetrical sides of the base 12 respectively and connected to the two first gear links 131 respectively, and both are rotatably connected to the carrier assembly 11. As shown in fig. 3, in the present embodiment, the two first gear links 131 and the two second gear links 132 are rotatably connected by the connecting member 15 and the axial movement of the two is limited by the limiting member 16, so as to ensure the stability of the transmission. The connecting member 15 may be a pin or the like for hinge. The stop member 16 may be a snap spring. It is understood that, in the present embodiment, the limiting member 16 may be disposed to limit the axial movement of the first gear link 131 when the first gear link is rotatably connected to the base 12. Meanwhile, the limiting member 16 may be provided to limit the axial movement of the second gear link 132 when the second gear link 132 is rotatably connected to the holder 112.

In addition, in the present embodiment, the electric driving assembly 14 includes a motor 141, a motor shaft 1411 of the motor 141 is fixedly connected to one of the two first gear portions 1311, and when the motor shaft 1411 rotates, one first gear portion 1311 can rotate along with the motor shaft 1411 to drive the other first gear portion 1311 to rotate, so that a distance between two joints of the two first gear links 131 and the two second gear links 132 becomes smaller or larger, and the lifting assembly 13 is unfolded or contracted. In the embodiment, when the motor shaft 1411 of the motor 141 rotates counterclockwise, the distance between the two joints of the two first gear links 131 and the two second gear links 132 becomes smaller, so that the lifting assembly 13 is unfolded upwards to drive the holder 112 to ascend, and thus the load 111 to ascend. When the motor shaft 1411 of the motor 141 rotates clockwise, the distance between the two joints of the two first gear links 131 and the two second gear links 132 becomes larger, so that the lifting assembly 13 contracts downwards to drive the holder 112 to descend, and thus the carrier 111 to descend.

It is understood that, in other embodiments, the motor shaft 1411 of the motor 141 may also rotate clockwise when the carrier 111 needs to be lifted, and the motor shaft 1411 of the motor 141 may also rotate counterclockwise when the carrier 111 needs to be lowered, which is not limited in particular.

In the embodiment, the two second gear links 132 are each formed with a second gear portion 1321, the two second gear links 132 are rotatably connected to the carrier assembly 11 through the two second gear portions 1321, respectively, and the two second gear portions 1321 are engaged with each other. In this way, the two second gear portions 1321 are engaged with each other, and when one rotates, the other rotates in synchronization, thereby ensuring the smoothness of the ascending and descending of the carrier 111. It is understood that in other embodiments, the second gear portion 1321 may not be formed on the second gear link 132, and the two second gear links 132 are directly and rotatably connected to the carrier assembly 11, and the specific connection manner is not limited.

Referring to fig. 3 to 7, in another embodiment, the lifting assembly 13 includes two first gear links 131 and two second gear links 132 respectively rotatably connected to the two first gear links 131, each of the two first gear links 131 is formed with a first gear portion 1311, the two first gear portions 1311 are engaged with each other and respectively rotatably connected to the base 12, and the electric driving assembly 14 is connected to one of the two first gear portions 1311. In addition, the lifting assembly 13 further includes two third gear links 133 and two fourth gear links 134 respectively rotatably connected to the two third gear links 133, the two second gear links 132 are formed with second gear portions 1321, the two third gear links 133 are formed with third gear portions 1331, the two second gear portions 1321 are engaged with each other and respectively engaged with the two third gear portions 1331, the two third gear portions 1331 are engaged with each other and respectively engaged with the two second gear portions 1321, and the two fourth gear links 134 are rotatably connected to the carrier assembly 11.

Specifically, in the present embodiment, the connection manner between the first gear link 131 and the second gear link 132, the structure of the first gear link 131, and the connection manner of the first gear link 131 and the base 12 are the same as those in the above-described embodiment. That is, in the present embodiment, the two first gear links 131 are also respectively disposed at two symmetrical sides of the base 12 and are both rotatably connected to the base 12. The two second gear links 132 are also disposed on two symmetrical sides of the base 12 respectively and connected to the two first gear links 131 respectively, and both are rotatably connected to the carrier assembly 11. Meanwhile, the two first gear links 131 and the two second gear links 132 are also rotationally connected by the two connecting members 15 and the axial movement of both is restricted by the stopper 16 to maintain rotational stability.

In addition, in the present embodiment, two third gear links 133 are also disposed on two symmetrical sides of the base 12, and two fourth gear links 134 are also disposed on two symmetrical sides of the base 12. The third gear link 133 and the fourth gear link 134 are also connected by the connecting member 15 and the limiting member 16 to limit the axial movement of the two (as shown in fig. 7). At the same time, the two fourth gear links 134 are both connected to the carrier assembly 11 in a rotatable manner and are limited in their axial movement by the limiting element 16.

In addition, in the present embodiment, the two second gear parts 1321 of the two second gear links 132 are respectively meshed with the two third gear parts 1331 of the two third gear links 133, and the two second gear parts 1321 are also meshed with each other and the two third gear parts 1331 are also meshed with each other. Thus, when the electric driving assembly 14 drives one of the first gear portions 1311 to rotate, the second gear link 132 rotates, so that the second gear portion 1321 also rotates, the third gear portion 1331 is driven to rotate, and the third gear link 133 rotates, thereby driving the fourth gear link 134 to rotate to drive the carrier assembly 11 to ascend or descend.

Referring to fig. 3, 4 and 6, in the present embodiment, when the carrying object 111 needs to be lifted, the motor shaft 1411 of the motor 141 rotates counterclockwise, the distance between the connection point of one first gear link 131 and one second gear link 132 and the connection point of the other first gear link 131 and the other second gear link 132 becomes smaller (see fig. 3), the first gear link 131 and the second gear link 132 expand upward, the two mutually engaged second gear portions 1321 rotate, so as to drive the two third gear portions 1331 to rotate so as to rotate the two third gear links 133, so as to reduce the distance between the two connection points of the two third links and the two fourth links, and the third gear link 133 and the fourth gear link 134 expand upward, thereby driving the carrying object assembly 11 to be lifted.

When the carrying object 111 is required to descend, when the motor shaft 1411 of the motor 141 rotates clockwise, the distance between the two joints of the two first gear links 131 and the two second gear links 132 becomes large, the first gear link 131 and the second gear link 132 contract downwards, the two second gear parts 1321 engaged with each other rotate, so as to drive the two third gear parts 1331 to rotate, so that the two third gear links 133 rotate, so that the distance between the two joints of the two third links and the two fourth links becomes large, and the third gear link 133 and the fourth gear link 134 contract downwards, so as to drive the carrying object assembly 11 to descend.

Referring to fig. 3 and fig. 6, in the embodiment, in order to ensure the meshing stability of the second gear portion 1321 and the third gear portion 1331 and the working stability of the lifting assembly, the lifting assembly 13 further includes a supporting seat 135, and the two second gear portions 1321 and the two third gear portions 1331 are disposed on the supporting seat 135 and rotatably connected to the supporting seat 135. The support base 135 moves upward when the lifting assembly 13 is unfolded upward, and the support base 135 moves downward when the lifting assembly 13 is contracted downward.

It is understood that, in the present embodiment, the limiting member 16 may also be disposed to limit the axial movement of the second gear link 132 when the second gear link is rotatably connected to the supporting seat 135. Meanwhile, the limiting member 16 may be provided to limit the axial movement of the third gear link 133 when rotatably connected to the supporting seat 135.

In addition, as shown in fig. 3, in the present embodiment, each of the two fourth gear links 134 is formed with a fourth gear portion 1341, the two fourth gear links 134 are respectively rotatably connected to the carrier assembly 11 through the two fourth gear portions 1341, and the two fourth gear portions 1341 are engaged with each other. Thus, the two fourth gear portions 1341 are engaged with each other, and when one rotates, the other also rotates, thereby ensuring the stability of the ascending and descending of the carrier 111. It is understood that in other embodiments, the fourth gear 1341 may not be formed on the fourth gear link 134, and two fourth gear links 134 are directly and rotatably connected to the carrier assembly 11, and the specific connection manner is not limited.

Finally, it should be noted that the above only illustrates the embodiment in which the lifting assembly 13 includes 2 and 4 gear links. It will be appreciated that the particular number of gear links may be increased or decreased depending on the particular actual need for the lift stroke. For example, when the height to be raised is high, more gear links can be used to achieve the raising and lowering, and the working principle is the same as that of the above-mentioned embodiment.

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.

The disclosure herein provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described herein. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A lifting device is characterized by comprising

A carrier assembly;

a base;

2. The lift device of claim 1, wherein the carrier assembly includes a carrier and a holder, the carrier being disposed on the holder, the holder being rotatably coupled to the lift assembly.

3. The lifting device according to claim 1, wherein the lifting assembly includes two first gear links and two second gear links rotatably connected to the two first gear links, respectively, the two first gear links each having a first gear portion formed thereon, the two first gear portions being engaged with each other and rotatably connected to the base, respectively, the two second gear links each being rotatably connected to the carrier assembly, and the electric drive assembly being connected to one of the two first gear portions.

4. The lift device recited by claim 3 wherein said electric drive assembly includes a motor having a motor shaft connected to one of said first gear portions.

5. The lifting device as claimed in claim 1, wherein the lifting assembly comprises two first gear links and two second gear links rotatably connected to the two first gear links, respectively, the two first gear links each being formed with a first gear portion, the two first gear portions being engaged with each other and rotatably connected to the base, respectively, the electric drive assembly being connected to one of the two first gear portions;

6. The lifting device as claimed in claim 5, wherein the lifting assembly further comprises a supporting base, and the two second gear portions and the two third gear portions are disposed on the supporting base and rotatably connected to the supporting base.

7. The lifting device according to claim 5, wherein each of the two fourth gear links is formed with a fourth gear portion, the two fourth gear portions being in mesh with each other, both of the fourth gear portions being in rotational connection with the carrier assembly.

8. The lifting device as claimed in claim 1, wherein the number of the base, the lifting assembly and the electric driving assembly is two and the two are respectively symmetrically disposed at two sides of the carrier assembly.

9. A household appliance, characterized in that it comprises:

a cavity; and

the lifting device of any of claims 1-8, wherein the lifting device is disposed in the chamber.

10. The household appliance according to claim 9, wherein the carrier assembly gradually protrudes from the cavity during the process that the electric driving assembly drives the lifting assembly to rotate relative to the base to drive the lifting assembly to expand or contract to drive the carrier assembly to ascend; when the electric driving assembly drives the lifting assembly to rotate relative to the base so as to drive the lifting assembly to contract or expand to drive the bearing object assembly to descend, the bearing object assembly is gradually retracted into the cavity.

11. The domestic appliance of claim 9 wherein said carrier assembly comprises a bowl and basket assembly.