Hydraulic adjusting device, footing system and household appliance

Abstract

The invention provides a hydraulic adjusting device, a footing system and a household appliance, the hydraulic adjusting device comprises a base, a barrel, at least two oil bags and an oil conveying channel, and the barrel and the base are in sliding connection in the axial direction to form a containing cavity; the oil conveying channel comprises a main channel and branch channels communicated with the main channel and the oil bags. And through the design of the multiple oil bags, the hydraulic adjusting device can be installed in a special space, and the applicability of the hydraulic adjusting device is improved.

Description

Hydraulic adjustment device, foot system and household appliance

[0001] This application is based on the Chinese patent application with application number 202410286738.2 and application date on March 13, 2024, and the Chinese patent application with application number 202411449401.5 and application date on October 16, 2024, and claims the priority of these Chinese patent applications. The entire contents of the above patent applications are hereby introduced into this application as a reference. Technical Field

[0002] The present application relates to the technical field of household appliances, and in particular to a hydraulic adjustment device, a foot system and a household appliance. Background Art

[0003] Since the use of household appliances has certain requirements on the flatness of the ground, generally, leveling bolts are set at the bottom of household appliances. However, due to the limitation of the installation site, the leveling bolts are inconvenient to adjust. There is a way to realize automatic leveling of household appliances through hydraulic automatic adjustment. If the hydraulic adjustment device is too small, it cannot withstand the pressure of the household appliances. If it is too large, it cannot be arranged and installed due to the limitation of the installation space.

[0004] Reference to any related art in this specification is not and should not be taken as an admission or any form of suggestion that the related art forms part of the common general knowledge in the application area or any other jurisdiction, or that the related art can be reasonably understood and regarded as relevant by a person skilled in the art.

[0005] Application Contents

[0006] The present application provides a hydraulic adjustment device, a foot system and a household appliance to solve one of the above problems.

[0007] In order to achieve the above objectives, the technical solutions provided by this application are as follows:

[0008] The present application provides a hydraulic adjustment device, comprising:

[0009] base;

[0010] A cylinder body is mounted on the base and forms a receiving cavity with the base, and the cylinder body and the base are slidably connected along the axial direction of the cylinder body;

[0011] at least two oil bags, the oil bags being arranged in the receiving cavity along the extension direction of the base;

[0012] The oil delivery channel includes a main channel and a branch channel communicating with the main channel and each of the oil bags.

[0013] As an embodiment of the present application, the base includes a substrate and a fixing structure located on the substrate, the fixing structure extends along the axial direction of the cylinder, and the cylinder is slidably connected to the fixing structure.

[0014] As one embodiment of the present application, the fixed structure includes a fixed plate fixed on the base plate and a side plate extending to one side from the fixed plate. One of the cylinder and the side plate is provided with a slider, and the other is provided with a sliding groove for the slider to slide and a stop block provided at the end of the sliding groove.

[0015] As an embodiment of the present application, the fixing structure includes a fixing plate fixed on the base plate, a sleeve extending from the fixing plate to one side, and the cylinder body and the sleeve are sleeved.

[0016] As an embodiment of the present application, the cylinder is sleeved within the sleeve, and includes first cylindrical portions corresponding to the oil sacs one by one, and a first contraction portion located between two adjacent first cylindrical portions, wherein a dimension of the first contraction portion perpendicular to the arrangement direction of the oil sacs is less than or equal to the diameter of the first cylindrical portion;

[0017] The sleeve includes a second cylindrical portion arranged in a one-to-one correspondence with the first cylindrical portion and a second contraction portion located between two adjacent second cylindrical portions, and the first contraction portion is located inside the second contraction portion.

[0018] As an embodiment of the present application, the cylinder further includes an anti-slip portion, and the sleeve is provided with a first stopper that cooperates with the anti-slip portion.

[0019] As an embodiment of the present application, the dimension of the first contraction portion along the direction perpendicular to the arrangement direction of the oil bags is smaller than the diameter of the first cylindrical portion, the anti-slip portion is located on the side of the first contraction portion close to the substrate, the anti-slip portion extends toward the outside of the cylinder, the second contraction portion is located on the side of the sleeve away from the substrate, and the second contraction portion is the first stop portion.

[0020] As an embodiment of the present application, the sleeve is sleeved within the barrel, and includes second cylindrical portions corresponding one to each of the oil sacs, and a second contraction portion located between two adjacent second cylindrical portions, wherein a dimension of the second contraction portion perpendicular to the arrangement direction of the oil sacs is less than or equal to a diameter of the second cylindrical portion.

[0021] The cylindrical body includes a first cylindrical portion arranged in a one-to-one correspondence with the second cylindrical portion and a first contraction portion located between two adjacent first cylindrical portions, and the second contraction portion is located inside the first contraction portion.

[0022] As an embodiment of the present application, the sleeve further includes a limiting portion, and the cylinder body is provided with a second stopping portion that cooperates with the limiting portion.

[0023] As an embodiment of the present application, the dimension of the second contraction portion along the direction perpendicular to the arrangement direction of the oil bags is smaller than the diameter of the second cylindrical portion, the limiting portion is located on the side of the second contraction portion away from the substrate, the limiting portion extends toward the outside of the sleeve, the first contraction portion is located on the side of the cylinder close to the substrate, and the first contraction portion is the second stop portion.

[0024] As an embodiment of the present application, the main channel is located in the substrate, and at least a portion of the main channel extends along the arrangement direction of the oil sacs.

[0025] As an embodiment of the present application, the substrate further includes a boss embedded in the fixed structure, the boss including cylindrical portions corresponding one to one with the oil bags and a connecting portion located between two adjacent cylindrical portions, and the main channel is located in the boss.

[0026] As an embodiment of the present application, the main channel includes an inlet section and an outlet section, and the inlet section and the outlet section are respectively connected to branch channels of different oil bags.

[0027] As an embodiment of the present application, the inner diameter of the main channel is not greater than the inner diameter of the branch channel.

[0028] As one embodiment of the present application, the branch channel is longitudinally elongated, and the extension direction of the branch channel is consistent with the extension direction of the main channel adjacent to the downstream of the branch channel.

[0029] As an embodiment of the present application, the base includes a substrate and a plug-in portion fixed on the substrate, the oil bag includes a docking portion that cooperates with the plug-in portion, and the branch channel passes through the plug-in portion and communicates with the oil bag.

[0030] As an embodiment of the present application, the oil bag further includes a sealing portion extending radially from the docking portion along the cylinder, and the hydraulic adjustment device further includes a pressure ring mounted on a base plate and press-fitting the sealing portion to the base plate.

[0031] The present application also provides a footing system, which includes the above-mentioned hydraulic adjustment device.

[0032] The present application also provides a household appliance, which includes the above-mentioned hydraulic adjustment device.

[0033] Compared with the prior art, the beneficial effect of the hydraulic adjusting device of the present application is that the hydraulic adjusting device of the present application changes the layout of the hydraulic adjusting device through the design of multiple oil bags, and the hydraulic adjusting device can be installed in a special space, thereby improving the applicability of the hydraulic adjusting device and thereby improving the user experience.

[0034] As used herein, the term "comprise" and variations of the term, such as "comprises," "comprised," "comprising," "including," and "containing," do not exclude other features, components, elements, or steps unless the context clearly requires otherwise. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] FIG1 is a schematic diagram of the three-dimensional structure of an embodiment of a hydraulic adjustment device of the present application.

[0036] FIG. 2 is an exploded view of the components of the hydraulic adjustment device in FIG. 1 .

[0037] FIG3 is an enlarged view of the local structure of point A in FIG2 .

[0038] FIG4 is a schematic diagram of the three-dimensional structure of the pressure ring in FIG1 from another direction.

[0039] FIG5 is a schematic structural diagram of the oil bag of the present application.

[0040] FIG6 is a cross-sectional view along the BB direction in FIG1 .

[0041] FIG7 is a schematic diagram of the three-dimensional structure of another embodiment of the hydraulic adjustment device of the present application.

[0042] FIG8 is an exploded view of the components of the hydraulic adjustment device in FIG7 .

[0043] FIG9 is a schematic structural diagram of the base shown in FIG7 .

[0044] FIG10 is a schematic structural diagram of the substrate shown in FIG7 .

[0045] FIG11 is a schematic structural diagram of the cylinder of the present application when it is sleeved in the sleeve.

[0046] FIG12 is a schematic structural diagram of the present invention when the sleeve is sleeved within the cylinder.

[0047] FIG13 is a schematic structural diagram of the cylinder shown in FIG12 .

[0048] FIG14 is a cross-sectional view of the hydraulic adjustment device shown in FIG7.

[0049] FIG15 is a side view of the hydraulic adjustment device.

[0050] FIG16 is a cross-sectional view taken along the CC direction in FIG15 .

[0051] Among them, 10-base, 11-base plate, 12-fixed structure, 121-fixed plate, 1211-first avoidance port, 1212-second avoidance port, 122-sleeve, 1221-slide groove, 1222-stop block, 1223-second cylindrical portion, 1224-second contraction portion, 1225-limiting portion, 13-plug-in portion, 14-limiting ring, 15-sealing groove, 16-boss, 161 cylindrical portion, 162-connecting Connecting part, 20-cylinder, 21-bottom wall, 22-sliding block, 23-partition plate, 24-first cylindrical part, 25-first contraction part, 26-anti-slip part, 30-oil bag, 31-docking part, 32-sealing part, 40-pressure ring, 41-docking surface, 411-pressing surface, 42-limiting surface, 43-positioning column, 50-oil delivery channel, 51-main channel, 511-inlet section, 512-outlet section, 52-branch channel.

[0052] Implementation Method

[0053] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts should fall within the scope of protection of this application.

[0054] It should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings and are intended only to simplify the description of this application. They do not indicate or imply that the device referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the scope of protection of this application. Specifically, in this application, the user's operating surface is referred to as the front, the direction toward the ground is referred to as the bottom, and conversely, the direction away from the ground is referred to as the top. Other descriptions of orientation are defined based on "upper" and "lower."

[0055] In the various figures of the present application, for the sake of convenience, some dimensions of structures or parts are exaggerated relative to other structural parts. Therefore, they are only used to illustrate the basic structure of the subject matter of the present application.

[0056] The present application provides a hydraulic adjustment device, a foot system and a household appliance, wherein the hydraulic adjustment device is applicable to the foot system at the bottom of the household appliance, and the household appliance includes but is not limited to refrigeration equipment, washing machines and the like.

[0057] As shown in Figures 1 to 16, the hydraulic adjustment device includes a base 10, a cylinder 20, at least two oil bladders 30, and an oil delivery channel 50. The cylinder 20 is mounted on the base 10 and forms a receiving chamber with the base 10. The oil bladders 30 are located within the receiving chamber. In actual use, multiple sets of these hydraulic adjustment devices are used in conjunction with each other, and according to the principles of hydraulics, the hydraulic medium circulates among the multiple adjustment devices, thereby achieving adaptive adjustment of the footing system.

[0058] For a single-sac hydraulic adjustment device, the sac needs to be large enough to provide stable support for the appliance, but its size is limited by the mounting space under the appliance. Dividing the single sac into multiple smaller sacs can effectively reduce the sac size, thereby reducing the space occupied by the appliance. Furthermore, the multiple smaller sacs can ensure more uniform pressure distribution across the hydraulic adjustment device, improving the stability of the support for the appliance.

[0059] In the actual application scenario of the hydraulic adjustment device, the base 10 can serve as the bottom of the hydraulic adjustment device in contact with the ground, or as the top of the hydraulic adjustment device in contact with the housing of a household appliance. The outer surface of the base 10 is a plane.

[0060] It should be noted that the shape of the cylinder 20 in this application can be determined according to the arrangement of the oil sacs 30 in the receiving chamber, as long as it can accommodate all the oil sacs 30. The shape of the cylinder 20 can be circular or other non-circular structures such as an "8" shape.

[0061] As shown in Figures 1, 2, 7, and 8, the barrel 20 includes a barrel body and a bottom wall 21. When subjected to force, the bottom wall 21 applies pressure to the oil bladder 30. As the bottom wall 21 compresses the oil bladder 30, the barrel 20 protects the oil bladder 30 and limits radial deformation of the oil bladder 30.

[0062] In a preferred embodiment, the cylinder 20 further includes a partition plate 23 . The partition plate 23 is located in the receiving cavity to divide the receiving cavity into chambers having the same number as the oil sacs 30 , so as to better protect each oil sac 30 .

[0063] The axial sliding connection between the cylinder 20 and the base 10 includes direct sliding connection and indirect sliding connection. When the cylinder 20 and / or the base 10 slide relative to each other under external force, the oil bladder 30 is squeezed. When the volume of the oil bladder 30 increases, the cylinder 20 and / or the base 10 are squeezed in the opposite direction, so that the cylinder 20 and the base 10 slide relative to each other, thereby expanding the receiving cavity.

[0064] In the embodiment in which the cylinder 20 is directly slidably connected to the base 10, the inner diameter of the cylinder 20 is not less than the outer diameter of the base 10. A slider is provided on the side of the base 10. The inner wall of the cylinder 20 is provided with a slide groove that cooperates with the slider and a stop block provided at the end of the slide groove. The slide groove extends along the axial direction of the cylinder 20. In this embodiment, the cylinder 20 serves as the bottom of the hydraulic adjustment device and contacts the ground. The base 10 is located inside the cylinder 20 and slides relative to the cylinder 20.

[0065] As shown in Figures 2 and 6, in an embodiment in which the cylinder 20 is indirectly slidably connected to the base 10, the base 10 includes a substrate 11 and a fixed structure 12 located on the substrate 11. The cylinder 20 and the fixed structure 12 are slidably connected along the axial direction of the cylinder to achieve cooperation between the cylinder 20 and the base 10. The receiving cavity is formed between the substrate 11, the fixed structure 12 and the cylinder 20. The fixed structure 12 extends along the axial direction of the cylinder 20 to increase the space for relative sliding between the base 10 and the cylinder 20.

[0066] In a specific embodiment, as shown in Figures 2 and 6, the fixing structure 12 includes a fixing plate 121 fixed on the base plate 11 and a side plate extending to one side from the fixing plate 121. The fixing plate 121 extends in the same direction as the base plate 11, and the side plate extends along the axial direction of the cylinder 20.

[0067] In a preferred embodiment, the base plate 11 is arranged perpendicular to the side plate, that is, the base plate 11 is perpendicular to the axial direction of the cylinder 20; of course, in a scheme where the base plate 11 is not perpendicular to the fixed structure 12, the side plate may also have a component in the axial direction of the cylinder 20 to ensure relative sliding with the cylinder 20.

[0068] In a preferred embodiment, the side plate is a sleeve 122 that is mutually connected with the cylinder 20, which not only increases the structural strength of the fixing structure 12 itself, but also increases the bonding strength with the cylinder 20, and also plays a role in protecting the oil bag 30.

[0069] In this embodiment, a boss 16 is provided on the base plate 11, and the sleeve 122 is sleeved on the boss 16, which facilitates the positioning and installation of the sleeve 122, improves the bonding strength between the fixing structure 12 and the base plate 11, and reduces the height of the hydraulic adjustment device.

[0070] Specifically, the boss 16 includes a cylindrical portion 161 corresponding to each of the oil bags 30 and a connecting portion 162 between two adjacent cylindrical portions 161. The shape of the boss 16 is the same as the inner shape of the sleeve 122.

[0071] Of course, the side panels may also be a plurality of plate-shaped objects fixed at intervals on the base plate 11, which is also within the scope of protection of the present application.

[0072] 2 and 6 , in one embodiment, one of the cylinder 20 and the sleeve 122 is provided with a slider 22, and the other is provided with a slide groove 1221 for the slider 22 to slide, and a stopper 1222 provided at the end of the slide groove 1221. Specifically, in the embodiment where the sleeve 122 is located outside the cylinder 20, the slider 22 can be provided at a position on the inner wall of the sleeve 122 close to the cylinder 20, or at a position on the outer wall of the cylinder 20 close to the base plate 11, and the slide groove 1221 is correspondingly provided at the outer wall of the cylinder 20 or the inner wall of the sleeve 122; in the embodiment where the sleeve 122 is located inside the cylinder 20, the slider 22 and the slide groove 1221 are provided correspondingly.

[0073] Of course, the fixing structure 12 may also be in a plate shape and directly fixed on the base plate 11 , or the fixing structure 12 and the base plate 11 may be integrally formed.

[0074] 7 to 14 , in another embodiment, the sliding connection between the cylinder 20 and the sleeve 122 is achieved through the structures of the cylinder 20 and the sleeve 122 .

[0075] 9 to 11 , in a specific embodiment, the cylinder 20 is sleeved in the sleeve 122 .

[0076] The cylinder 20 includes a first cylindrical portion 24 arranged in a one-to-one correspondence with the oil sacs 30 and a first contraction portion 25 located between two adjacent first cylindrical portions 24. The dimension of the first contraction portion 25 along a direction perpendicular to the arrangement direction of the oil sacs 30 is less than or equal to the diameter of the first cylindrical portion 24.

[0077] The sleeve 122 includes a second cylindrical portion 1223 corresponding to each of the first cylindrical portions 24 and a second contraction portion 1224 located between two adjacent second cylindrical portions 1223 . The first contraction portion 25 is located within the second contraction portion 1224 .

[0078] The shape of the cylindrical body 20 matches the shape of the sleeve 122. The outer diameter of the first cylindrical portion 24 is equal to the inner diameter of the second cylindrical portion 1223, allowing the first cylindrical portion 24 to be nested within the second cylindrical portion 1223. The number of first cylindrical portions 24, the number of second cylindrical portions 1223, and the number of oil bladders 30 are equal, providing dual protection for the oil bladders 30.

[0079] The intersection of two adjacent first cylindrical portions 24 forms the first contraction portion 25. A second contraction portion 1224 that cooperates with the first contraction portion 25 is provided between two adjacent second cylindrical portions 1223.

[0080] In one embodiment, the dimension of the first contraction portion 25 perpendicular to the arrangement direction of the oil bladders 30 is equal to the diameter of the first cylindrical portion 24. Correspondingly, the dimension of the second contraction portion 1224 perpendicular to the arrangement direction of the oil bladders 30 is equal to the inner diameter of the second cylindrical portion 1223.

[0081] The cooperation between the first contraction portion 25 and the second contraction portion 1224 can guide the cylinder 20 to rise and fall axially along the sleeve 122 , thereby preventing the cylinder 20 from rotating during the axial lifting and falling process along the sleeve 122 .

[0082] The barrel 20 further includes an anti-slip portion 26, and the sleeve 122 is provided with a first stopper that cooperates with the anti-slip portion 26. The anti-slip portion 26 cooperates with the first stopper to prevent the barrel 20 from escaping from the sleeve 122. The anti-slip portion 26 and the first stopper can be configured similarly to the slider 22 and the stop block 1222.

[0083] In this embodiment, the position of the anti-slip portion 26 is not specifically limited, and it can be provided at the first cylindrical portion 24 or at the first contraction portion 25 .

[0084] In another embodiment, the dimension of the first contraction portion 25 perpendicular to the arrangement direction of the oil bladders 30 is smaller than the diameter of the first cylindrical portion 24, thereby further reducing the volume of the cylinder 20 and making the cylinder 20 fit more closely to the oil bladders 30. The second contraction portion 1224 extends toward the interior of the sleeve 122.

[0085] It is understood that the inner contour of the second contraction portion 1224 is the same as the outer contour of the first contraction portion 25, and the first contraction portion 25 is located inside the second contraction portion 1224. The cooperation between the first contraction portion 25 and the second contraction portion 1224 can guide the cylinder 20 to rise and fall along the axial direction of the sleeve 122, thereby preventing the cylinder 20 from rotating during the axial rise and fall of the sleeve 122.

[0086] Taking the hydraulic adjustment device with a double oil bag 30 as an example, at this time, the shape of the cylinder 20 is approximately "8"-shaped. Compared with the hydraulic adjustment device with a single oil bag, the "8"-shaped cylinder 20 can play a guiding role through its own shape. Therefore, there is no need to add an additional guiding structure to the cylinder 20. The inner cavity shape of the sleeve 122, which is compatible with the cylinder 20, is also approximately "8"-shaped. The "8"-shaped cylinder 20 uses the first contraction part 25 located at the intersection of the two first cylindrical parts 24 as a guiding structure. The first contraction part 25 moves up and down along the second contraction part 1224 of the sleeve 122, thereby effectively preventing the cylinder 20 from rotating during the lifting and adjustment process.

[0087] In this embodiment, the anti-slip portion 26 is located on the side of the first constricted portion 25 closer to the base plate 11 and extends outward from the cylindrical body 20. The second constricted portion 1224 is located on the side of the sleeve 122 farther from the base plate 11. That is, the axial length of the second constricted portion 1224 along the sleeve 122 is less than the height of the sleeve 122. The second constricted portion 1224 also serves as the first stop. The anti-slip portion 26 cooperates with the second constricted portion 1224 to prevent the cylindrical body 20 from escaping from the sleeve 122.

[0088] When the hydraulic adjustment device is in a contracted state, the oil bag 30 is in a contracted state, the cylinder 20 is accommodated in the sleeve 122 , and the second contracted portion 1224 is located on a side of the first contracted portion 25 away from the anti-slip portion 26 .

[0089] When hydraulic medium enters the oil bladder 30, the oil bladder 30 begins to expand and acts on the cylinder 20 to push it out of the sleeve 122. With the cooperation of the first contraction portion 25 and the second contraction portion 1224, the cylinder 20 can move smoothly along the axial direction of the sleeve 122, and the anti-slip portion 26 simultaneously follows the cylinder 20 toward the second contraction portion 1224. When the anti-slip portion 26 contacts the second contraction portion 1224, the cylinder 20 cannot move further, thereby preventing it from escaping from the sleeve 122.

[0090] The second constricted portion 1224 serves both as a guide and a limiter. The distance between the anti-slip portion 26 and the second constricted portion 1224 defines the maximum adjustable height of the hydraulic adjustment device. By positioning the anti-slip portion 26 between the two first cylindrical portions 24, the space between the two oil bladders 30 is fully utilized, making the hydraulic adjustment device more compact and reducing its size.

[0091] It should be noted that the shape of the first cylindrical portion 24 can be circular, elliptical, or other approximately circular shapes, depending on the shape of the oil bag 30. The shape of the second cylindrical portion 1223 is the same as that of the first cylindrical portion 24.

[0092] 12 to 13 , in another specific embodiment, the sleeve 122 is sleeved in the cylinder 20 .

[0093] The sleeve 122 includes a second cylindrical portion 1223 arranged in a one-to-one correspondence with the oil bag 30 and a second contraction portion 1224 located between two adjacent second cylindrical portions 1223. The dimension of the second contraction portion 1224 along the direction perpendicular to the arrangement direction of the oil bag 30 is less than or equal to the diameter of the second cylindrical portion 1223.

[0094] The cylindrical body 20 includes a first cylindrical portion 24 corresponding to the second cylindrical portion 21 and a first contraction portion 25 located between two adjacent first cylindrical portions 24 . The second contraction portion 1224 is located inside the first contraction portion 25 .

[0095] The shape of the cylinder 20 matches the shape of the sleeve 122. The outer diameter of the second cylindrical portion 1223 is equal to the inner diameter of the first cylindrical portion 24, so that the second cylindrical portion 1223 can be sleeved inside the first cylindrical portion 24.

[0096] The intersection of two adjacent second cylindrical portions 1223 forms the second contraction portion 1224 , and the first contraction portion 25 cooperating with the second contraction portion 1224 is provided between two adjacent first cylindrical portions 24 .

[0097] In one embodiment, the dimension of the second contraction portion 1224 perpendicular to the arrangement direction of the oil bladders 30 is equal to the diameter of the second cylindrical portion 1223. Correspondingly, the dimension of the first contraction portion 25 perpendicular to the arrangement direction of the oil bladders 30 is equal to the inner diameter of the first cylindrical portion 24.

[0098] The cooperation between the first contraction portion 25 and the second contraction portion 1224 can guide the cylinder 20 to rise and fall axially along the sleeve 122 , thereby preventing the cylinder 20 from rotating during the axial lifting and falling process along the sleeve 122 .

[0099] The sleeve 122 further includes a limiting portion 1225, and the cylinder 20 is provided with a second stopper that cooperates with the limiting portion 1225. The limiting portion 1225 cooperates with the second stopper to prevent the cylinder 20 from being separated from the sleeve 122. The limiting portion 1225 and the second stopper can be configured similarly to the slider 22 and the stop block 1222.

[0100] In this embodiment, the position of the anti-slip portion 1225 is not specifically limited, and it can be set at the second cylindrical portion 1223 or the second contraction portion 1224.

[0101] In another embodiment, the dimension of the second contraction portion 1224 perpendicular to the arrangement direction of the oil bladders 30 is smaller than the diameter of the second cylindrical portion 1223, thereby further reducing the volume of the sleeve 122 and making the sleeve 122 fit more closely to the oil bladders 30. The first contraction portion 25 extends toward the interior of the barrel 20.

[0102] It is understood that the inner contour of the first contraction portion 25 is identical to the outer contour of the second contraction portion 1224, and the second contraction portion 1224 is located within the first contraction portion 25. The cooperation between the first contraction portion 25 and the second contraction portion 1224 can guide the cylinder 20 to rise and fall axially along the sleeve 122, thereby preventing the cylinder 20 from rotating during the axial lifting and lowering process along the sleeve 122.

[0103] Taking the hydraulic adjustment device with a double oil bag 30 as an example, the shape of the sleeve 122 is approximately "8"-shaped. Compared with the hydraulic adjustment device with a single oil bag, the "8"-shaped sleeve 122 can play a guiding role through its own shape, so there is no need to add an additional guiding structure to the sleeve 122. The inner cavity shape of the cylinder 20 is also approximately "8"-shaped to match the sleeve 122. The "8"-shaped cylinder 20 uses the first contraction portion 25 located at the intersection of the two first cylindrical portions 24 as a guiding structure. The first contraction portion 25 moves up and down along the second contraction portion 1224 of the sleeve 122, thereby effectively preventing the cylinder 20 from rotating during the lifting and adjustment process.

[0104] In this embodiment, the stopper 1225 is located on the side of the second contraction 1224 away from the base plate 11 and extends outward from the sleeve 122. The first contraction 25 is located on the side of the cylinder 20 closer to the base plate 11. That is, the axial length of the first contraction 25 along the cylinder 20 is less than the height of the cylinder 20. The first contraction 25 also serves as the second stopper. The stopper 1225 cooperates with the first contraction 25 to prevent the cylinder 20 from escaping from the sleeve 122.

[0105] When the hydraulic adjustment device is in a contracted state, the oil bag 30 is in a contracted state, the sleeve 122 is accommodated in the cylinder 20 , and the first contraction portion 25 is located on a side of the second contraction portion 1224 away from the limiting portion 1225 .

[0106] When hydraulic medium enters the oil bladder 30, the oil bladder 30 begins to expand and acts on the cylinder 20 to push it to move. With the cooperation of the first contraction portion 25 and the second contraction portion 1224, the cylinder 20 can move smoothly along the axial direction of the sleeve 122. The first contraction portion 25 simultaneously follows the cylinder 20 toward the limit portion 1225. When the first contraction portion 25 contacts the limit portion 1225, the cylinder 20 cannot move further, thereby preventing the cylinder 20 from separating from the sleeve 122.

[0107] The first contraction 25 serves both as a guide and as a limiter. The distance between the first contraction 25 and the limiter 1225 defines the maximum adjustable height of the hydraulic adjustment device. By positioning the limiter 1225 between the two second cylindrical portions 1223, the space between the two oil bladders 30 is fully utilized, making the hydraulic adjustment device more compact and reducing its size.

[0108] It should be noted that the shape of the second cylindrical portion 1223 can be circular, elliptical, or other approximately circular shapes, depending on the shape of the oil bag 30. The shape of the first cylindrical portion 24 is the same as that of the second cylindrical portion 1223.

[0109] The oil bladders 30 are arranged within the receiving cavity along the extension direction of the base 10. Several oil bladders 30 ensure the hydraulic adjustment device can properly bear the load. Furthermore, the arrangement of multiple oil bladders 30 allows the overall shape of the hydraulic adjustment device to be modified to accommodate various installation environments of the household appliance. For example, the oil bladders 30 can be arranged in a straight line or in a matrix to facilitate installation in a narrow space.

[0110] As a preferred embodiment of the present application, the oil bladder 30 and the base plate 11 are preferably plug-fitted, which facilitates the installation of the oil bladder 30 and improves the sealing performance of the oil bladder 30 and the base plate 11.

[0111] Specifically, as shown in Figures 2, 3, 5 and 11, the base 11 also includes a plug-in portion 13 fixed on the substrate 11, the oil bag 30 includes a docking portion 31 that cooperates with the plug-in portion 13, and the plug-in portion 13 extends along the axial direction of the cylinder 20.

[0112] In order to further improve the sealing between the oil bag 30 and the base plate 11, the oil bag 30 also includes a sealing portion 32 extending radially from the docking portion 31 along the cylinder 20, and the sealing portion 32 is attached to the base plate 11. The base plate 11 is also provided with a limiting ring 14, and the limiting ring 14 is located on the outside of the plug-in portion 13 and is spaced apart from the plug-in portion 13. A sealing groove 15 that cooperates with the sealing portion 32 is formed between the plug-in portion 13 and the limiting ring 14, and the sealing portion 32 is interference fit with the sealing groove 15. The setting of the sealing portion 32 and the limiting ring 14 not only increases the path connecting the inside and outside of the oil bag 30, but also improves the bonding strength between the oil bag 30 and the base plate 11.

[0113] In a preferred embodiment, as shown in Figures 2 and 4 , the hydraulic adjustment device further includes a pressure ring 40, which is mounted on the base plate 11 and presses the sealing portion 32 against the base plate 11. In a specific embodiment, the pressure ring 40 is sleeved over the docking portion 31, thereby enhancing the bonding strength between the oil bladder 30 and the base plate 11 and limiting the radial position of the docking portion 31 along the pressure ring 40.

[0114] The pressure ring 40 has a docking surface 41 that docks with the substrate 11. In this embodiment, since the limiting ring 14 protrudes from the substrate 11, the docking surface 41 correspondingly has a crimping surface 411 that cooperates with the limiting ring 14 and the sealing portion 32. The crimping surface 411 is formed by a portion of the docking surface 411 being recessed inward, which can increase the path connecting the inside and outside of the oil bag 30, improve the sealing between the oil bag 30 and the substrate 11, and also improve the bonding strength between the oil bag 30 and the substrate 11.

[0115] The pressure ring 40 has a limiting surface 42 away from the substrate 11, and the limiting surface 42 is inclined from the outside to the inside. When the oil bag 30 is squeezed, the oil bag 30 has the tendency to move toward the substrate 11 or has the tendency to move. The limiting surface 42 prevents the movement of the oil bag 30, which can effectively improve the efficiency of the hydraulic medium output from the oil bag 30.

[0116] At the same time, the limiting surface 42 cooperates with the outer surface of the oil bladder 30 to effectively prevent the oil bladder 30 from being damaged by pressure. The oil bladder 30 can fit with the limiting surface 42 under pressure to protect the oil bladder 30.

[0117] It can be understood that the pressure ring 40 serves as both a fixing member and a protective member of the oil bag 30 .

[0118] The pressing ring 40 further has a positioning post 43 . When the pressing ring 40 is installed, the positioning post 43 cooperates with the base plate 11 , which facilitates installation and improves installation efficiency.

[0119] As shown in FIG. 6 and FIG. 14 , the oil delivery channel 50 is used to communicate with other hydraulic adjustment devices or oil supply devices, and is used to deliver the hydraulic medium to the oil bag 30 or output it from the oil bag 30 .

[0120] Specifically, the oil delivery channel 50 includes a main channel 51 and a branch channel 52 connecting the main channel 51 and each of the oil bags 30. The main channel 51 and the branch channel 52 cooperate to realize the interconnection between the oil bags 30. The branch channel 52 passes through the plug-in portion 13 and is connected to the oil bag 30.

[0121] As shown in Figure 16, the main channel 51 includes an inlet section 511 and an outlet section 512, wherein the extension directions of the inlet section 511 and the outlet section 512 can be arranged in the same direction or in different directions. The arrangement of the inlet section 511 and the outlet section 512 is designed according to the actual needs of the hydraulic adjustment device.

[0122] The inlet section 511 and the outlet section 512 are respectively connected to the branch channels 52 of different oil bags 30 , so that the hydraulic medium can flow smoothly into the different oil bags 30 .

[0123] In a preferred embodiment, along the arrangement direction of the oil bags 30 , the inlet section 511 and the outlet section 512 are respectively connected to the branch channels 52 of the first oil bag 30 and the last oil bag 30 .

[0124] In some embodiments of the present application, the fixing plate 121 is further provided with a first avoidance opening 1211 for avoiding the inlet section 511 and a second avoidance opening 1212 for avoiding the outlet section 512. In this way, interference with the inlet section 511 and the outlet section 512 can be avoided.

[0125] The inner diameter of the main channel 51 is not larger than the inner diameter of the branch channel 52 to prevent the hydraulic medium from overflowing from the main channel 51 to the branch channel 52 during the process of transporting the hydraulic medium into the oil bag 30. The smaller inner diameter design of the main channel 51 facilitates the transportation of the hydraulic medium.

[0126] In a preferred embodiment, the branch channel 52 is longitudinally elongated, and its extension direction is aligned with that of the main channel 51 located downstream of the branch channel 52. This ensures that during the hydraulic medium delivery process, each branch channel 51 has an exhaust space, facilitating smooth entry of the hydraulic medium into the oil bladder 50.

[0127] In the embodiment where the oil sac 30 is plugged into the base plate 11, the main channel 51 is located inside the base plate 11, and at least part of the main channel 51 extends along the arrangement direction of the oil sac 30, which facilitates the setting of the branch channel 52, reduces the length of the branch channel 52, and facilitates the circulation of the hydraulic medium.

[0128] When the oil sac 30 is sealed, the oil delivery channel 50 is connected to the oil sac 30 through a connecting pipe. The main channel 51 can be located in the substrate 11 or in the receiving cavity, and can be connected to the oil sac 30 .

[0129] The present application also provides a footing system, which includes the above-mentioned hydraulic adjustment device and a footing connected to the hydraulic adjustment device. The footing can be arranged on the upper part, lower part or side of the hydraulic adjustment device. The hydraulic medium in the hydraulic adjustment device circulates in several hydraulic footings to achieve adaptive balance of the hydraulic footings.

[0130] The present application also provides a household appliance, which includes the above-mentioned hydraulic adjustment device, and the hydraulic adjustment device is located on the bottom wall of the household appliance. The hydraulic principle is used to realize the circulation of hydraulic medium in multiple groups of adjustment devices, thereby realizing horizontal adjustment of the household appliance.

[0131] To sum up, the hydraulic adjusting device of the present application changes the layout of the hydraulic adjusting device through the design of multiple oil bags 30, and the hydraulic adjusting device can be installed in a special space, thereby improving the applicability of the hydraulic adjusting device and thereby improving the user experience.

[0132] It should be understood that although this specification is described according to embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0133] The series of detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present application and are not intended to limit the scope of protection of the present application. Any equivalent embodiments or changes that do not deviate from the technical spirit of the present application should be included in the scope of protection of the present application.

Claims

1. A hydraulic adjustment device, characterized in that: include: base; A cylinder body is mounted on the base and forms a receiving cavity with the base, wherein the cylinder body and the base are slidably connected along the axial direction of the cylinder body; at least two oil bags, the oil bags being arranged in the receiving cavity along the extension direction of the base; The oil delivery channel includes a main channel and a branch channel communicating with the main channel and each of the oil bags.

2. The hydraulic adjustment device according to claim 1, characterized in that: The base includes a base plate and a fixing structure located on the base plate. The fixing structure extends along the axial direction of the cylinder. The cylinder is slidably connected to the fixing structure.

3. The hydraulic adjustment device according to claim 2, characterized in that: The fixing structure includes a fixing plate fixed on the base plate and a side plate extending to one side from the fixing plate. One of the cylinder and the side plate is provided with a slider, and the other is provided with a sliding groove for the slider to slide and a stop block provided at the end of the sliding groove.

4. The hydraulic adjustment device according to claim 2, characterized in that: The fixing structure includes a fixing plate fixed on the base plate and a sleeve extending from the fixing plate to one side, and the cylinder body and the sleeve are sleeved.

5. The hydraulic adjustment device according to claim 4, characterized in that: The cylinder is sleeved in the sleeve, and includes first cylindrical portions corresponding to the oil sacs one by one, and a first contraction portion located between two adjacent first cylindrical portions, wherein the dimension of the first contraction portion perpendicular to the arrangement direction of the oil sacs is less than or equal to the diameter of the first cylindrical portion; The sleeve includes a second cylindrical portion arranged in a one-to-one correspondence with the first cylindrical portion and a second contraction portion located between two adjacent second cylindrical portions, and the first contraction portion is located inside the second contraction portion.

6. The hydraulic adjustment device according to claim 5, characterized in that: The cylinder further includes an anti-slip portion, and the sleeve is provided with a first stopping portion matched with the anti-slip portion.

7. The hydraulic adjustment device according to claim 6, characterized in that: The dimension of the first contraction portion along the direction perpendicular to the arrangement direction of the oil bags is smaller than the diameter of the first cylindrical portion. The anti-slip portion is located on the side of the first contraction portion close to the substrate. The anti-slip portion extends toward the outside of the cylinder. The second contraction portion is located on the side of the sleeve away from the substrate. The second contraction portion is the first stop portion.

8. The hydraulic adjustment device according to claim 4, characterized in that: The sleeve is sleeved in the cylinder, and includes second cylindrical portions corresponding to the oil sacs one by one, and a second contraction portion located between two adjacent second cylindrical portions, wherein the dimension of the second contraction portion perpendicular to the arrangement direction of the oil sacs is less than or equal to the diameter of the second cylindrical portion; The cylindrical body includes a first cylindrical portion arranged in a one-to-one correspondence with the second cylindrical portion and a first contraction portion located between two adjacent first cylindrical portions, and the second contraction portion is located inside the first contraction portion.

9. The hydraulic adjustment device according to claim 8, characterized in that: The sleeve further includes a limiting portion, and the cylinder body is provided with a second stopping portion matched with the limiting portion.

10. The hydraulic adjustment device according to claim 9, characterized in that: The dimension of the second contraction portion along the direction perpendicular to the arrangement direction of the oil bags is smaller than the diameter of the second cylindrical portion. The limiting portion is located on the side of the second contraction portion away from the substrate. The limiting portion extends toward the outside of the sleeve. The first contraction portion is located on the side of the cylinder close to the substrate. The first contraction portion is the second stop portion.

11. The hydraulic adjustment device according to claim 2, characterized in that: The main channel is located in the base plate, and at least a portion of the main channel extends along the arrangement direction of the oil sacs.

12. The hydraulic adjustment device according to claim 11, characterized in that: The base plate further includes a boss embedded in the fixing structure, the boss includes cylindrical portions arranged in one-to-one correspondence with the oil bags and a connecting portion located between two adjacent cylindrical portions, and the main channel is located in the boss.

13. The hydraulic adjustment device according to claim 1, characterized in that: The main channel includes an inlet section and an outlet section, and the inlet section and the outlet section are respectively connected to branch channels of different oil bags.

14. The hydraulic adjustment device according to claim 1, wherein: The inner diameter of the main channel is not greater than the inner diameter of the branch channel.

15. The hydraulic adjustment device according to claim 1, wherein: The branch channel is longitudinally elongated, and an extension direction of the branch channel is consistent with an extension direction of a main channel adjacent to the downstream of the branch channel.

16. The hydraulic adjustment device according to any one of claims 1 to 15, characterized in that: The base includes a base plate and a plug-in portion fixed on the base plate. The oil bag includes a docking portion matched with the plug-in portion. The branch channel passes through the plug-in portion and is communicated with the oil bag.

17. The hydraulic adjustment device according to claim 16, characterized in that: The oil bag further includes a sealing portion extending from the docking portion along the radial direction of the cylinder, and the hydraulic adjustment device further includes a pressure ring mounted on a base plate and press-connecting the sealing portion to the base plate.

18. A footing system, characterized in that: Comprising the hydraulic adjustment device according to any one of claims 1 to 17.

19. A household appliance, characterized in that: Comprising the hydraulic adjustment device according to any one of claims 1 to 17.

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