Movable trundle assembly, base mechanism and household appliance

Abstract

The utility model relates to a household appliance, in particular to a movable trundle assembly, a base mechanism and the household appliance, and aims to solve the problem that a movable trundle assembly of an existing household appliance cannot be normally folded and unfolded, and resonance noise can be avoided. In order to achieve the purpose, the movable trundle assembly comprises a base, a rolling wheel assembly, a limiting structure, a movable part and a guiding structure, and the rolling wheel assembly is rotatably arranged on the base and has a retracting position close to the base and an unfolding position away from the base; the limiting structure is used for limiting the roller assembly at the withdrawing position; the moving part is movably arranged on the base; the guide structure is arranged on the moving part and used for moving towards the roller assembly under the driving of the moving part so as to guide the roller assembly to the unfolding position; and when the rolling wheel assembly is located at the unfolding position, the rolling wheel assembly can be separated from the limiting structure.

Description

Technical Field

[0001] This application relates to the technical field of household appliances, and particularly provides a movable caster assembly, a base mechanism and a household appliance. Background Art

[0002] In existing household appliances, with the improvement of users' requirements for the convenience and functional diversification of household appliances, many household appliances, such as washing machines, refrigerators, washer-dryers, etc., are gradually equipped with movable caster assemblies. The main purpose of using the movable caster assembly is to retract it when not in use to maintain the stability of the household appliance, and to deploy it when the household appliance needs to be moved, facilitating the user to push, pull or adjust the position. This greatly facilitates daily use, especially when cleaning, maintaining or adjusting the position of the household appliance.

[0003] However, the smooth opening and closing of the movable caster assembly may rely on an additional spring, which is designed to provide the necessary restoring force during the opening and retracting processes of the movable caster assembly. However, the application of the spring also brings a problem that cannot be ignored, that is, when a household appliance such as a washing machine is running, the spring is prone to resonance. This resonance is particularly obvious under high rotational speeds or severe vibrations, and may cause additional noise during the operation of the device. Especially during the high-speed dehydration stage of the washing machine, the vibration frequency is high, and the spring is more likely to resonate at this frequency, further amplifying the noise and affecting the user's quality of life.

[0004] Correspondingly, there is a need in the art for a new movable caster assembly, a base mechanism and a household appliance to solve the problem that the movable caster assembly of the existing household appliance cannot avoid generating resonance noise under normal retracting and deploying conditions. Summary of the Invention

[0005] This application aims to solve the above technical problems, that is, to solve the problem that the movable caster assembly of the existing household appliance cannot avoid generating resonance noise under normal retracting and deploying conditions.

[0006] In a first aspect, this application provides a movable caster assembly, characterized in that it includes: a base; a roller assembly rotatably arranged on the base, having a retracted position close to the base and a deployed position away from the base; a limiting structure for limiting the roller assembly to the retracted position; a moving member movably arranged on the base; and a guiding structure arranged on the moving member for moving towards the roller assembly under the drive of the moving member to guide the roller assembly to the deployed position; wherein when the roller assembly is in the deployed position, the roller assembly can be separated from the limiting structure.

[0007] In the case of adopting the above solution, when it is not necessary to move the household appliance, the roller assembly is in the retracted position, and the limiting structure provides limitation for the roller assembly, so that the roller assembly does not descend. In this case, the foot component of the household appliance contacts the ground or other supporting surfaces, thus ensuring the stable support of the household appliance. When it is necessary to move the household appliance, the guiding structure is driven by the moving member to move towards the roller assembly, so that the guiding structure guides the roller assembly to the deployed position. In this case, the limiting structure is separated from the roller assembly to ensure the normal deployment of the roller assembly, and then the household appliance can be moved. The above setting method does not require parts such as springs, and still can ensure the normal deployment and retraction of the movable caster assembly, thus avoiding the generation of resonance noise during the operation of the household appliance.

[0008] In the optional technical solution of the above movable caster assembly, the limiting structure abuts against the roller assembly.

[0009] In the case of adopting the above solution, by abutting the limiting structure against the roller assembly, the structural connection is relatively simple, which simplifies the design and manufacturing process. At the same time, it can provide fixed support at the retracted position of the roller assembly to prevent the roller assembly from accidentally moving or descending in the static state, thereby enhancing the stability of the device.

[0010] In the optional technical solution of the above movable caster assembly, the limiting structure is arranged on the moving member, and the limiting structure and the guiding structure are located on opposite sides of the roller assembly.

[0011] In the case of adopting the above technical solution, when the moving member moves to make the guiding structure move towards the roller assembly, since the limiting structure and the guiding structure are located on opposite sides of the roller assembly, the limiting structure can be immediately separated from the roller assembly to ensure that the roller assembly can be freely deployed. With the effective guidance of the guiding structure, the rapid and accurate deployment operation of the roller assembly can be realized; when the moving member moves to make the guiding structure move away from the roller assembly, the limiting structure gradually approaches and finally abuts against the roller assembly to ensure the stable retraction of the roller assembly. At the same time, the guiding structure assists the roller assembly to return to the retracted position to ensure the smoothness and stability of the operation.

[0012] In the optional technical solution of the above movable caster assembly, the roller assembly includes a roller and a connecting member. One end of the connecting member is rotatably connected to the base through a rotating shaft, and the other end of the connecting member is rotatably connected to the roller. The limiting structure abuts against the connecting member and / or the rotating shaft.

[0013] In the case of adopting the above solution, the limiting function is concentrated on the connecting member and / or the rotating shaft, without additional complex limiting mechanisms, which simplifies the overall design and reduces the manufacturing cost and maintenance difficulty.

[0014] In the alternative technical solution of the above-mentioned mobile caster assembly, the limiting structure is configured as a protrusion protruding from the moving member.

[0015] In the case of adopting the above solution, since the protrusion does not have elasticity, it restricts the excessive movement of the component and reduces the transmission of vibration energy. Therefore, it will not resonate at a specific frequency like a spring, and can effectively avoid the noise problem caused by resonance. In addition, this structure is relatively simple and does not occupy too much extra space.

[0016] In the alternative technical solution of the above-mentioned mobile caster assembly, the base includes a first bottom plate and first vertical plates provided on opposite sides of the first bottom plate. The first bottom plate and the first vertical plates on both sides enclose a guiding groove. Both ends of the rotating shaft are connected to the first vertical plates on both sides, and the moving member is arranged between the rotating shaft and the bottom plate.

[0017] In the case of adopting the above solution, while ensuring the rotational stability of the roller assembly, it does not hinder the movement of the moving plate, and can prevent the moving plate from falling when subjected to impact.

[0018] In the alternative technical solution of the above-mentioned mobile caster assembly, the moving member is configured as a moving plate. Second vertical plates are provided on opposite sides of the moving plate, and limiting holes extending along the moving direction of the moving plate are provided on the second vertical plates. The rotating shaft is arranged in the limiting holes.

[0019] In the case of adopting the above solution, since second vertical plates are provided on opposite sides of the moving plate, a moving groove matching the shape of the guiding groove can be formed between the second vertical plates and the moving plate. The moving groove and the wall surfaces of the guiding groove can be in frictional contact, so as to achieve smooth movement and avoid shaking. Since the rotating shaft is arranged in the limiting holes and connected to the first vertical plates, the moving distance of the moving plate can be restricted, the precise deployment and retraction of the roller assembly can be realized, and since the moving groove can be restricted to move only along the moving direction, there will be no up-and-down shaking.

[0020] In the alternative technical solution of the above-mentioned mobile caster assembly, first structural parts and second structural parts are provided on opposite sides of the base, and both the first structural parts and the second structural parts are used for installing the feet.

[0021] In the case of adopting the above solution, the installation process of the feet can be simplified, and the assembly efficiency can be improved. And the installation strength at the feet is improved, which further enhances the overall connection strength between the mobile caster assembly and the bottom plate of the household appliance, making the mobile caster assembly more firmly installed, thereby improving the overall stability of the equipment. Especially under complex ground conditions or frequent movement, the equipment can always move smoothly.

[0022] In the alternative technical solution of the above-mentioned mobile caster assembly, the guiding structure has an inclined surface, and the inclined surface inclines away from the roller assembly starting from the moving member.

[0023] On the other hand, the present application also provides a base mechanism for a household appliance, which is characterized by including a foot component and the mobile caster assembly described in any of the above embodiments. An installation portion is provided on the base, and the foot component is provided on the installation portion. When in the retracted position, the foot component can support the household appliance, and when in the deployed position, the mobile caster assembly can drive the household appliance to move.

[0024] In the alternative technical solution of the above-mentioned base mechanism for a household appliance, the foot component includes at least two telescopic feet, and each telescopic foot is configured to automatically level the household appliance; and / or the number of the mobile caster assemblies is at least two, and they are located on opposite sides of the bottom of the household appliance.

[0025] In the case of adopting the above solution, when the user needs to move the household appliance, the mobile caster assembly can be deployed, so as to drive the household appliance to move through the mobile caster assembly. After stopping the movement, the mobile caster assembly can be retracted, and the telescopic foot component can perform a leveling operation after contacting the ground, ensuring that the device immediately returns to a stable state. Without any additional operations, the movement and stability of the device can be achieved, and thus the use scenarios of the household appliance can be seamlessly and stably switched.

[0026] On the other hand, the present application also provides a household appliance, and this household appliance includes the above-mentioned base mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:

[0028] Figure 1 is a schematic structural view of the bottom of the household appliance of the present application;

[0029] Figure 2 is a schematic structural view of the base mechanism of the household appliance of the present application;

[0030] Figure 3 is Figure 2 an enlarged view of part A in

[0031] Figure 4 is a front view of the base mechanism of the household appliance of the present application;

[0032] Figure 5 is a rear view of the base mechanism of the household appliance of the present application;

[0033] Figure 6It is a partial structural schematic diagram of the base mechanism of the household appliance of the present application;

[0034] Figure 7 It is a structural schematic diagram of the telescopic foot component of the household appliance of the present application;

[0035] Figure 8 It is Figure 7 The enlarged view of position B in

[0036] Explanation of the reference numerals:

[0037] 1 - Movable caster assembly; 11 - Base; 111 - First bottom plate; 112 - First vertical plate; 113 - First structural part; 1131 - Avoidance groove; 1132 - First mounting structure; 114 - Second structural part; 1141 - Second mounting structure; 12 - Roller assembly; 121 - Roller; 122 - Connecting piece; 123 - Rotating shaft; 13 - Limiting structure; 14 - Movable part; 15 - Second vertical plate; 151 - Limiting hole; 16 - Guiding structure; 161 - Inclined plane; 2 - Foot component; 21 - First foot; 211 - Support pad; 212 - First connection structure; 22 - Second foot; 221 - Hydraulic foot; 222 - Foot base; 2221 - Liquid passage; 223 - Adjusting foot; 2231 - Accommodating cavity; 224 - Telescopic cavity; 3 - Handle; 31 - First shaft; 32 - Second shaft; 4 - Connecting structure; 5 - Extension edge. Detailed implementation manners

[0038] The preferred implementation manners of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these implementation manners are only used to explain the technical principle of the present application and are not intended to limit the protection scope of the present application. Those skilled in the art can make adjustments according to needs to adapt to specific application scenarios.

[0039] It should be noted that in the description of the present application, the terms "upper" and "lower" refer to the upper and lower parts of the household appliance based on the height direction in the use state. "Front" refers to the direction close to the door based on the horizontal direction in the use state of the household appliance, and "rear" refers to the direction close to its back based on the horizontal direction in the use state of the household appliance. The width direction is the direction perpendicular to the front and rear directions of the household appliance. In addition, it should also be noted that in the description of the present application, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0040] The present application provides a household appliance, which can be a laundry treatment device such as a washing machine, a washer-dryer, a dryer, or a refrigerator, etc. The present application does not limit this. For the sake of convenience of description, the household appliance in the following text will be introduced by taking a washing machine as an example.

[0041] The washing machine of the present application includes a base mechanism, such as Figures 1 to 6 shown. The base mechanism includes a moving caster assembly 1 and a foot component 2. The moving caster assembly 1 is arranged on opposite sides of the base (also called the bottom plate) of the washing machine. The moving caster assembly 1 can be arranged along the front-rear direction of the washing machine and is configured to be able to be deployed and retracted. When retracted, the foot component 2 can support the washing machine. When deployed, the moving caster assembly 1 can drive the washing machine to move, such as being able to drive the washing machine to move in the front-rear direction.

[0042] Referring to Figures 1 to 3 , the moving caster assembly 1 of the present application includes a base 11 and a moving support wheel set. The moving support wheel set includes a roller assembly 12, a limiting structure 13, a moving member 14, and a guiding structure 16. The roller assembly 12 is rotatably arranged on the base 11 and has a retracted position close to the base 11 and a deployed position away from the base 11. The limiting structure 13 is used to limit the roller assembly 12 to the retracted position. The moving member 14 is movably arranged on the base 11. The guiding structure 16 is arranged on the moving member 14 and is used to move towards the roller assembly 12 under the drive of the moving member 14 to guide the roller assembly 12 to the deployed position. Among them, when the roller assembly 12 is in the deployed position, the roller assembly 12 can be separated from the limiting structure 13.

[0043] That is, when the washing machine does not need to be moved, the roller assembly 12 is in the retracted position, and the limiting structure 13 provides a limit for the roller assembly 12, so that the roller assembly 12 does not descend. In this case, the foot component 2 of the washing machine contacts the ground or other supporting surfaces, that is, the foot component 2 supports the washing machine, thereby ensuring the stable support of the washing machine. When the washing machine needs to be moved, the guiding structure 16 is driven by the moving member 14 to move towards the roller assembly 12, so that the guiding structure 16 guides the roller assembly 12 to the deployed position. In this case, the limiting structure 13 is separated from the roller assembly 12, ensuring the normal deployment of the roller assembly 12, and further enabling the washing machine to be moved. The above setting method can still ensure the normal deployment and retraction of the moving caster assembly 1 without using parts such as springs, thereby avoiding resonance noise generated during the operation of the washing machine.

[0044] Possibly, the base 11 includes a first bottom plate 111 and first vertical plates 112 provided on opposite sides of the first bottom plate 111. The first bottom plate 111 and the first vertical plates 112 on both sides enclose a guiding groove. The moving member 14 is configured as a moving plate, and the moving plate is movably arranged in the guiding groove, thereby limiting the moving direction of the moving plate to only reciprocate along the extending direction of the guiding groove, improving the stability of the moving caster assembly 1. Possibly, the roller assembly 12 includes a roller 121 and a connecting member 122. One end of the connecting member 122 is rotatably connected to the first vertical plate 112 through a rotating shaft 123, and the other end of the connecting member 122 is rotatably connected to the roller 121. Possibly, the guiding structure 16 on the moving plate has an inclined surface 161, and the inclined surface 161 slopes away from the roller assembly 12 starting from the moving plate. The limiting structure 13 can be provided on the moving plate. The limiting structure 13 and the guiding structure 16 are located on opposite sides of the roller assembly 12, and the limiting structure 13 abuts against the connecting member 122. Among them, the present application does not limit the specific shape of the guiding structure 16, which can be triangular pyramid-shaped, wedge-shaped, etc.

[0045] That is, when the roller assembly 12 is in the retracted position, the limiting structure 13 abuts against the connecting member 122, restricting the relative rotation of the connecting member 122 and preventing the roller assembly 12 from descending. When the roller assembly 12 needs to be deployed, the moving plate is moved along the first direction, so that the limiting structure 13 moves away from the roller assembly 12, and the guiding structure 16 on the moving plate moves towards the roller assembly 12. When the inclined surface 161 on the guiding structure 16 reaches the roller 121, the roller 121 rolls from the side of the inclined surface 161 close to the moving plate to the side of the inclined surface 161 away from the moving plate until finally the connecting member 122 abuts against the guiding structure 16, so that the roller assembly 12 is in the deployed position and the roller 121 contacts the ground or other supporting surfaces. At this time, the limiting structure 13 has separated from the connecting member 122 to release the limit. When the roller assembly 12 needs to be retracted, the moving plate is moved along the second direction opposite to the first direction. In this case, the roller 121 moves towards the moving plate along the inclined surface 161, and at the same time the connecting member 122 rotates towards the moving plate, and the limiting structure 13 abuts against the connecting member 122 again. At this time, the bottom feet of the washing machine have contacted the supporting surface, thus completing the retraction of the moving caster assembly 1.

[0046] Among them, the above-mentioned first direction can be the direction towards the front of the washing machine, and the above-mentioned second direction can be the direction towards the rear of the washing machine. In this case, the moving plate can reciprocate along the front-rear direction of the washing machine. It should be noted that this specific direction is only exemplary. For example, the first direction can also be the direction towards the rear of the washing machine, and the above-mentioned second direction can be the direction towards the front of the washing machine, etc.

[0047] Possibly, the connecting member 122 can be rod-shaped, and the number thereof can be two. The ends on the same side of the two connecting members 122 can be fixedly connected to the above-mentioned rotating shaft 123, for example, fixedly sleeved on the rotating shaft 123. The two ends of the rotating shaft 123 are respectively rotatably connected to the first vertical plates 112 on both sides. The roller 121 is located between the two connecting members 122 and is rotatably connected to the ends on the other side of the two connecting members 122. Or replace "the ends on the same side of the two connecting members 122 can be fixedly connected to the above-mentioned rotating shaft 123, and the two ends of the rotating shaft 123 are respectively rotatably connected to the first vertical plates 112 on both sides" with "the ends on the same side of the two connecting members 122 are rotatably connected to the rotating shaft 123, and the two ends of the rotating shaft 123 are respectively fixedly connected to the first vertical plates 112 on both sides". It can be understood that the above introduction is not restrictive. The connecting member 122 can also be plate-shaped with a shaft hole on one side for rotatably connecting to the vertical plate through the rotating shaft 123, and a rotating shaft 123 on the other side for rotatably connecting to the roller 121, etc. Adjustments of these specific implementation manners do not deviate from the principle of the present application and are all within the protection scope of the present application. In addition, the number of the above-mentioned rod-shaped connecting members 122 is not fixed and can also be set to one, etc. Adjustments of these numbers do not deviate from the principle of the present application and are all within the protection scope of the present application.

[0048] As an alternative implementation manner, although the above is introduced by taking the limiting structure 13 abutted against the connecting member 122 as an example, this is not intended to limit the protection scope of the present application. For example, when the rotating shaft 123 is fixedly connected to the connecting member 122, the limiting structure 13 can be abutted against the rotating shaft 123. Of course, the connecting member 122 can also be abutted against the rotating shaft 123 and the connecting member 122 at the same time, etc. These adjustments do not deviate from the principle of the present application and are all within the protection scope of the present application. In addition, the limiting structure 13 can be not arranged on the moving member 14. For example, the limiting structure 13 is arranged on the first vertical plate 112 or the bottom plate, so that the limiting structure 13 can also be abutted against the roller 121, etc. These adjustments do not deviate from the principle of the present application and are all within the protection scope of the present application.

[0049] As a possible implementation manner, the limiting structure 13 is configured as a limiting protrusion protruding from the moving plate. When the connecting member 122 is rod-shaped, it can be arranged in one-to-one correspondence with the connecting member 122, and the protrusion can be integrally formed on the moving member 14. Since the protrusion does not have elasticity, it limits the excessive movement of the components and reduces the transmission of vibration energy. Therefore, it will not resonate at a specific frequency like a spring, and can effectively avoid the noise problem caused by resonance. In addition, this structure is relatively simple and does not occupy too much extra space.

[0050] As a possible implementation, when both ends of the rotating shaft 123 are respectively connected to the first vertical plates 112 on both sides, the moving plate is arranged between the rotating shaft 123 and the bottom plate. Thus, while ensuring the rotational stability of the roller assembly 12, it does not prevent the movement of the moving plate, and can avoid the dropping of the moving plate when it is impacted.

[0051] As a possible implementation, second vertical plates 15 are provided on opposite sides of the moving plate. Limiting holes 151 extending along the moving direction of the moving plate are provided on the second vertical plates 15, and the rotating shaft 123 is arranged in the limiting holes 151. Since the second vertical plates 15 are provided on opposite sides of the moving plate, a moving groove matching the shape of the guiding groove can be formed between the second vertical plates 15 and the moving plate. Frictional contact can be made between the moving groove and each wall surface of the guiding groove, thereby achieving smooth movement and avoiding shaking. Since the rotating shaft 123 is arranged in the limiting holes 151 and connected to the first vertical plates 112, the moving distance of the moving plate can be limited, the precise deployment and retraction of the roller assembly 12 can be achieved, and since the moving groove can be limited to move only along the moving direction, there will be no up-and-down shaking.

[0052] As a possible implementation, guiding structures 16 and limiting structures 13 are provided on opposite sides in the length direction of the moving plate, and roller assemblies 12 located between the limiting structures 13 and the guiding structures 16 are provided on opposite sides in the length direction of the base 11, so that the moving caster assembly 1 can move smoothly when deployed.

[0053] It should be noted that the specific implementation manner in which the limiting structure 13 of the present application limits the roller assembly 12 to the retracted position and can be separated from the roller assembly 12 when the roller assembly 12 is in the deployed position is not fixed. For example, as an alternative implementation, a first magnetic attraction member is provided on the roller assembly 12. For example, the first magnetic attraction member is arranged on the connecting member 122, a second magnetic attraction member is provided on the moving member 14, and the first magnetic attraction member and the second magnetic attraction member attract each other to limit the roller assembly 12 to the retracted position. When the roller assembly 12 is in the deployed position, the roller assembly 12 is separated from the second magnetic attraction member to release the limit, etc. These adjustments do not deviate from the principle of the present application and are all within the protection scope of the present application.

[0054] In addition, the specific implementation of the roller assembly 12 can also be adjusted. As long as it is rotatably arranged on the base 11 and has a retracted position close to the base 11 and a deployed position away from the base 11, any adjustment to its specific implementation does not deviate from the principle of this application and is within the protection scope of this application. For example, the roller assembly 12 includes a moving rod and a roller 121. The roller 121 is rotatably arranged on the moving rod, and the moving rod is movably arranged relative to the base 11 in the height direction. For example, a guide groove extending in the height direction is provided on the base 11. An abutting strip is provided at the end of the moving rod away from the roller 121, and the end of the abutting strip is limited in the guide groove. The limiting structure 13 abuts against the abutting strip. When the guiding structure 16 moves towards the roller assembly 12, under the action of the inclined surface 161, it can drive the roller 121 to move away from the moving member 14 through the abutting strip and the moving rod, so that the roller assembly 12 unfolds and breaks away from the limitation of the limiting structure 13.

[0055] As a possible implementation, the foot component 2 includes a telescopic foot component for automatically leveling the household appliance. Thus, when the user needs to move the washing machine, the moving caster assembly 1 can be unfolded, and the household appliance can be driven to move through the moving caster assembly 1. After stopping the movement, the moving caster assembly 1 can be retracted. After the telescopic foot component contacts the ground, a leveling operation is performed to ensure that the device immediately returns to a stable state. Without any additional operation, the movement and stability of the device can be achieved, and then the use scenarios of the washing machine can be seamlessly and stably switched.

[0056] As a possible implementation, the bottom of the washing machine has an extended edge 5 protruding therefrom. The extended edge 5 can be located on the side close to the door body of the washing machine, that is, the front side of the washing machine, and the extended edge 5 can be arranged along the width direction of the washing machine. The extended edge 5 can be understood as the extended edge 5 extending downward from the bottom shell of the washing machine, or can also be understood as the extended edge 5 extending downward from the bottom side of the front shell of the washing machine, etc. The extended edge 5 can be fixedly connected to the base of the washing machine. For example, the base has a flanging, and after the flanging fits with the extended edge 5, it is fixedly connected by means such as bolt connection and welding, thereby enhancing the structural strength of the washing machine and improving the overall stability. The extended edge 5 can also provide protection for the components at the bottom of the washing machine, effectively preventing damage or scratches to the bottom structure of the washing machine by external objects, and can also be used as a decorative panel, etc. A first structural part 113 is provided on the base 11 of the present application, and an avoidance groove 1131 is provided on the first structural part 113. The avoidance groove 1131 is used to accommodate the above-mentioned extended edge 5, that is, after the moving caster assembly 1 is installed on the washing machine, the avoidance groove 1131 also extends along the width direction of the washing machine. Possibly, the avoidance groove 1131 is formed by enclosing a bottom wall and side walls provided on both sides of the bottom wall. Among them, the avoidance groove 1131 can be an avoidance groove 1131 that penetrates through both sides to facilitate accommodating one side of the extended edge 5, or can also be an avoidance groove 1131 with one side blocked and the other side penetrating, etc.

[0057] Since the first structural part 113 of the base 11 of the moving caster assembly 1 of the present application is provided with an avoidance groove 1131, and the extended edge 5 is arranged in the avoidance groove 1131, it can ensure that the moving caster assembly 1 is horizontally installed on the base, improving the smoothness of the washing machine during the moving process, avoiding the movement obstruction caused by inclination or instability, prolonging the service life of the washing machine, and at the same time improving the user experience. Therefore, the moving caster assembly 1 of the present application can enable the device to form bottom protection while also taking into account the moving smoothness.

[0058] As a possible implementation, a second structural part 114 is also provided on the base 11. The first structural part 113 and the second structural part 114 are located on opposite sides of the base 11. The bottom foot assembly 2 includes a first bottom foot 21 and a second bottom foot 22. A first installation structure 1132 for installing the first bottom foot 21 is provided on the first structural part 113, and a second installation structure 1141 for installing the second bottom foot 22 is provided on the second structural part 114. Among them, both the first structural part 113 and the second structural part 114 are preferably plate-like structures.

[0059] Since the first structural part 113 and the second structural part 114 are located on opposite sides of the base 11, after the first foot 21 is installed on the first structural part 113 and the second foot 22 is installed on the second structural part 114, the overall stability can be increased. In addition, the above setting method can also simplify the installation process of the feet and the caster assembly, improve the assembly efficiency, and improve the installation strength at the feet, which further enhances the overall connection strength between the caster assembly 1 and the washing machine base, making the caster assembly 1 more firmly installed, thereby improving the overall stability of the device. Especially under complex ground conditions or frequent movement, the device can always move smoothly.

[0060] As a possible implementation manner, the first installation structure 1132 is disposed on the side of the first structural part 113 close to the moving bracket wheel set in the avoidance groove 1131. Since the first foot 21 is disposed on the first installation structure 1132, the first foot 21 and the moving bracket wheel set can be located on the same side of the extension edge 5, so that the extension edge 5 can provide protection for both the first foot 21 and the moving bracket wheel set at the same time, improving the stability of the structure.

[0061] Possibly, the first installation structure 1132 is configured as a first installation hole, such as a round hole, a square hole, etc. The above-mentioned first foot 21 can be a fixed foot, and the fixed foot includes a support pad 211 and a first connection structure 212. The first connection structure 212 is connected to one side of the support pad 211. The first connection structure 212 passes through the first installation hole and is connected to the base. The support pad 211 is used to contact a reference surface such as the ground. Among them, the first connection structure 212 can be a threaded rod. In this case, a fastening nut can be sleeved on the threaded rod, and the fastening nut fastens the first structural part 113 to the base. The first structural part 113 can act as a gasket to improve the connection stability. However, this is not restrictive, and its fastening method can be adjusted. For example, the first connection structure 212 is a connecting rod with a buckle structure. After the first connection structure 212 is fixed to the base, the buckle structure is clamped with the first structural part 113 to achieve fixation. These adjustments do not deviate from the principle of the present application and are within the protection scope of the present application.

[0062] As a possible implementation, the second mounting structure 1141 is configured as a slot, which is arranged along the direction from the first structural part 113 to the second structural part 114, so that the position of the second foot 22 is adjustable. For example, when the first structural part 113 is located at the front side of the base and the second structural part 114 is located at the rear side of the base, the position of the second foot 22 can be adjusted back and forth relative to the washing machine, so that the position of the feet of washing machines with different depths can be adjusted, which is applicable to washing machines of different models, facilitating the transformation and upgrading of existing washing machines. Moreover, the arrangement of the extending direction of the slot can ensure the stable support of the foot assembly for the washing machine. Wherein, fixing holes corresponding to the position of the slot can be reserved on the base of the washing machine, which is convenient for installation. Possibly, the second foot 22 is configured as the telescopic foot in the telescopic foot assembly, and a second connecting structure is connected to the telescopic foot. The second connecting structure passes through the slot and is connected to the base.

[0063] Since the first foot 21 arranged on one side of the extending edge 5 is a fixed foot, the stability of the foot structure on this side can be ensured, and it will not be damaged due to excessive force. At the same time, the telescopic foot on the other side can be automatically adjusted according to the ground conditions to ensure the uniform force of the entire bottom structure and reduce the risk of damage. In addition, the first foot 21 is designed to be non-adjustable, which can provide a stable foundation for the equipment. Especially at the front side position, it can effectively prevent the front end of the equipment from shaking or tilting during use. The telescopic foot on the opposite side provides flexibility and can adjust the height according to actual needs, enabling the equipment to operate smoothly in various scenarios.

[0064] The possible implementations of the telescopic foot assembly will be introduced below.

[0065] Possibly, as Figure 7 and Figure 8 shown, the telescopic foot assembly includes a communicating structure 4 and at least two telescopic feet. The telescopic foot includes a foot base 222, an adjusting foot 223 and a telescopic cavity 224. The foot base 222 is installed on the second structural part 114 and sleeved on the adjusting foot 223. The adjusting foot 223 is movably arranged along the height direction. The adjusting foot 223 has a receiving cavity 2231. The telescopic cavity 224 is arranged in the receiving cavity 2231 and is configured to drive the adjusting foot 223 to move. The telescopic cavities 224 of at least two telescopic feet are communicated through the communicating structure 4. The communicating structure 4 can be a pipe or a combination of a pipe and a liquid storage tank that are interconnected. Among them, the telescopic cavity 224 can be a corrugated cavity made of a flexible material. The flexible material can be rubber, etc., and it can be fixed or in contact connection with the inner wall corresponding to the receiving cavity 2231 and abutted against the foot base 222. However, this is not restrictive. The telescopic cavity 224 can also be a rubber bladder, etc.

[0066] Among them, the telescopic cavity 224 can be filled with a hydraulic medium. Under the action of pressure, the hydraulic medium can flow between the interconnected telescopic cavities 224. When the ground is uneven, different pressures are generated due to the unevenness. The fluidity of the hydraulic medium enables adaptive adjustment of the telescopic length between the telescopic cavities 224, thereby driving the adjustment feet 223 to perform adaptive telescoping relative to the bottom foot seats 222. After the hydraulic medium stops flowing, automatic leveling of the telescopic feet can be achieved.

[0067] The way that the respective telescopic cavities 224 are connected through the connection structure 4 can be that liquid channels 2221 are provided on each of the bottom foot seats 222, each telescopic cavity 224 has a liquid passing port, the liquid passing port of each telescopic foot is connected to one end of the liquid channel 2221, and the other ends of the liquid channels 2221 of each telescopic foot are connected through the connection structure 4. Possibly, an installation groove is formed inside the bottom foot seat 222, a first limiting ring protruding inward is provided at the notch of the installation groove, and a second limiting ring is provided on the outer wall of the adjustment foot 223. The second limiting ring is located above the first limiting ring so that the first limiting ring provides limitation to prevent the adjustment foot 223 from falling off.

[0068] Among them, the number and positions of the strip holes for installing the telescopic feet can be adjusted according to actual application situations. For example, when the bottom foot seat 222 is square, connection holes can be provided at the four corners of the bottom foot seat 222. In this case, the strip holes can be provided on the opposite sides of the second structural part 114. The strip holes on one side correspond to two connection holes on one side of the bottom foot seat 222, and the strip holes on the other side correspond to two connection holes on the other side of the bottom foot seat 222. Then, bolts or screws are sequentially passed through the corresponding connection holes and strip holes and connected to the base. Another example is when connection holes are provided in the middle of the opposite sides of the bottom foot seat 222, only one strip hole can be provided, and then bolts or screws are sequentially passed through the corresponding connection holes and strip holes and connected to the base. In addition, positioning holes can also be provided on the second structural part 114 to pre-position the telescopic feet first and then perform the connection to improve accuracy.

[0069] It should be noted that although the telescopic feet of the present application are described by taking the hydraulic feet 221 as an example, this is not intended to limit the protection scope of the present application. As long as the telescopic feet have the function of automatic leveling, they can be any existing or future possible structures.

[0070] Next, possible driving methods of the moving member 14 will be introduced.

[0071] The moving member 14 can be mechanically manually driven or automatically driven. When it is manually driven, the mobile caster assembly 1 can further include a handle 3 and a driving structure. The handle 3 drives the moving member 14 to reciprocate through the driving structure. The driving structure can be a link mechanism, a cam mechanism, a rack and pinion mechanism, a crank mechanism, etc. Taking a possible embodiment as an example for illustration, the driving structure is provided on one side of the handle 3 and can be integrally formed with the handle 3. It includes a body and a first connecting portion and a second connecting portion provided on the body. The first connecting portion is rotatably connected to the first structural portion 113 through a first shaft 31. A limiting hole is provided on the moving plate, and a second shaft 32 is provided on the second connecting portion. The second shaft 32 is movably disposed in the limiting hole. Thus, after the handle 3 rotates a certain angle, it can drive the moving plate to move in the first direction, so as to realize the unfolding of the roller assembly 12. After the handle 3 rotates a certain angle in the reverse direction, it can drive the moving plate to move in the second direction opposite to the first direction, so as to realize the retraction of the roller assembly 12. Among them, the handle 3 can be located on the side of the first structural portion 113 away from the moving support wheel set in the avoidance groove 1131, so that it can be not blocked by the extension edge 5, which is convenient for the user to perform manual driving. When automatic driving is adopted, the moving member 14 can be driven by an electric push rod or a cylinder, etc.

[0072] As an alternative embodiment, the specific structural form of the base 11 of the present application is not fixed and can be adjusted. For example, the base 11 includes a bottom plate and a support arm provided on the bottom plate, and the roller assembly 12 is rotatably connected to the support arm, etc. These adjustments do not deviate from the principle of the present application and are all within the protection scope of the present application.

[0073] As an alternative embodiment, the specific form of the guiding structure 16 is not fixed. As long as it can guide the roller assembly 12 to the unfolded position, its specific form can be adjusted. For example, the guiding structure 16 can be an arc-shaped guiding structure 16, a roller 121 type guiding structure 16 or other structures with guiding functions. These adjustments of specific forms do not deviate from the basic principle of the present application and all belong to the protection scope of the present application.

[0074] As an alternative embodiment, although the moving member 14 of the present application is introduced by taking the moving plate as an example, this is not intended to limit the protection scope of the present application. It can be any possible structure as long as it can be movably arranged on the base 11.

[0075] As an alternative embodiment, although this application is introduced by taking the mobile caster assemblies 1 provided on the opposite sides of the base of the washing machine as an example, this is not restrictive. For example, the mobile caster assemblies 1 can be provided in the middle of the base, and four sets of roller assemblies 12 of the mobile caster assemblies 1 can be provided. For example, two sets of roller assemblies 12 spaced apart are provided at the front side, and two sets of roller assemblies 12 spaced apart are provided at the rear side, and a limiting structure 13 and a guiding structure 16 are provided at the positions corresponding to each roller assembly 12. These adjustments do not deviate from the principle of this application and are all within the protection scope of this application.

[0076] As an alternative embodiment, the specific structural form of the avoidance groove is not fixed. As long as it can avoid the extending edge, its specific structural form can be adjusted. For example, the avoidance groove is configured as a stepped groove, etc. It can be understood that the stepped groove includes a first body and a second body. The first body is bent towards the bottom relative to the base, and the second body is bent in a direction away from the base relative to the first body. The extending edge is provided at the first body and the second body. These adjustments do not deviate from the principle of this application and are all within the protection scope of this application.

[0077] As an alternative embodiment, the specific forms of the first mounting structure and the second mounting structure of this application are not fixed. For example, the first mounting structure and the second mounting structure are configured as clamping grooves, etc. The first foot and the second foot are connected to the base of the washing machine through the corresponding clamping grooves. These adjustments do not deviate from the principle of this application and are all within the protection scope of this application.

[0078] So far, the technical solutions of this application have been described in combination with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of this application is obviously not limited to these specific embodiments. On the premise of not deviating from the principle of this application, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this application.

Claims

1. A mobile caster assembly, characterized in that, Comprising: A base; A roller assembly rotatably disposed on the base, having a retracted position close to the base and an extended position away from the base; A limiting structure for limiting the roller assembly to the retracted position; A moving member movably disposed on the base; A guiding structure disposed on the moving member for moving towards the roller assembly under the drive of the moving member to guide the roller assembly to the extended position; Wherein, when the roller assembly is in the extended position, the roller assembly can be separated from the limiting structure.

2. The mobile caster assembly according to claim 1, wherein The limiting structure abuts against the roller assembly.

3. The mobile caster assembly according to claim 2, wherein The limiting structure is disposed on the moving member, and the limiting structure and the guiding structure are located on opposite sides of the roller assembly.

4. The mobile caster assembly according to claim 3, wherein The roller assembly includes a roller and a connecting member. One end of the connecting member is rotatably connected to the base through a rotating shaft, and the other end of the connecting member is rotatably connected to the roller. The limiting structure abuts against the connecting member and / or the rotating shaft.

5. The mobile caster assembly according to claim 4, wherein The limiting structure is configured as a protrusion protruding from the moving member.

6. The mobile caster assembly according to claim 4 or 5, wherein The base includes a first bottom plate and first vertical plates disposed on opposite sides of the first bottom plate. The first bottom plate and the first vertical plates on both sides enclose a guiding groove. Both ends of the rotating shaft are connected to the first vertical plates on both sides, and the moving member is disposed between the rotating shaft and the bottom plate; and / or The moving member is configured as a moving plate, and second vertical plates are provided on opposite sides of the moving plate. Limiting holes extending along the moving direction of the moving plate are provided on the second vertical plates, and the rotating shaft is disposed in the limiting holes.

7. The mobile caster assembly according to claim 1, wherein First structural parts and second structural parts are provided on opposite sides of the base, and both the first structural parts and the second structural parts are used for installing feet; and / or The guiding structure has an inclined surface that slopes away from the roller assembly starting from the moving member.

8. A base mechanism of a household appliance, characterized in that, Comprising a foot assembly and the mobile caster assembly according to any one of claims 1 to 6. An installation part is provided on the base, and the foot assembly is disposed on the installation part. In the retracted position, the foot assembly can support the household appliance, and in the extended position, the mobile caster assembly can drive the household appliance to move.

9. The base mechanism of the household appliance according to claim 8, wherein The foot assembly includes at least two telescopic feet, and each telescopic foot is configured to automatically level the household appliance; and / or The number of the mobile caster assemblies is at least two, located on opposite sides of the bottom of the household appliance.

10. A household appliance, characterized in that, The household appliance includes the base mechanism described in claim 8 or 9.

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