Base structure for household appliance and household appliance
By setting limiting components and limiting parts on the base of household appliances, the problem of unreliable worm gear and worm drive is solved, and reliable height adjustment and simple assembly process are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NINGBO FOTILE KITCHEN WARE CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-05-15
AI Technical Summary
In the existing worm gear and worm drive system of household appliance bases, the worm may become disengaged due to excessive force, leading to unreliable height adjustment.
A first limiting member and a second limiting member are provided on the base, and a first limiting part and a second limiting part are provided on the worm, so that the worm and the worm wheel remain engaged in the transmission state. By the abutting of the limiting member and the limiting part, the worm is ensured to have a certain axial movement margin, and the worm and the worm wheel are prevented from jamming.
It achieves reliable transmission between the worm gear and the worm, ensuring the reliability of height adjustment of the household appliance base. It has a simple structure, is easy to assemble, and has low cost.
Smart Images
Figure CN224245802U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of household appliance technology, specifically to a base structure for a household appliance and the household appliance itself. Background Technology
[0002] Adjustable height is widely used in the home appliance industry. For example, washing machines and built-in kitchen appliances are embedded in suitable cabinets. After installation, they are both beautiful and aesthetically pleasing. However, after being placed behind the cabinet, the appliances need to be fine-tuned to make their height suitable.
[0003] Adjustable feet are widely used in built-in dishwashers. During dishwasher installation, the height needs to be fine-tuned. For example, the Chinese utility model patent "Height Adjustment Structure for Built-in Dishwasher" (patent application number CN202322940129.8, publication number CN221750329U) discloses a structure including a base, an adjustment assembly, and a support structure. The base has a first sidewall and a second sidewall arranged opposite to each other. The adjustment assembly includes an adjustment rod with its two ends connected to the first and second sidewalls respectively. The adjustment rod has a suspended section between the first and second sidewalls, with multiple connection positions. The support structure is connected to at least one connection position and restricts the movement of the adjustment rod so that its two ends can rotate along the same horizontal line. The adjustment assembly also includes a worm gear and a worm. The worm gear has an internal thread and an external thread that meshes with the worm. The support foot is located inside the worm gear and meshes with the internal thread. One end of the adjustment rod has the worm, and the support structure is positioned close to the worm.
[0004] However, during the worm gear and worm drive process, the worm may be subjected to large forces and disengage from the worm gear, resulting in unreliable force transmission and making it impossible to adjust the height of the base. Utility Model Content
[0005] The first technical problem to be solved by this utility model is to provide a reliable base structure for household appliances based on the current state of the technology, using worm gear and worm drive.
[0006] The second technical problem to be solved by this utility model is to provide a household appliance that applies the above-mentioned base structure, in view of the current state of the prior art.
[0007] The technical solution adopted by this utility model to solve the first technical problem mentioned above is: a base structure for household appliances, comprising...
[0008] Base;
[0009] The support rod is set vertically, and the bottom of the support rod is equipped with feet for support on the ground;
[0010] Lifting assembly, the lifting assembly includes
[0011] A pivot extending in the front-to-back direction, the pivot being able to rotate about its axis;
[0012] The worm gear has one end coaxial with and fixed to the first end of the rotating shaft, and the other end is rotatably mounted on the base;
[0013] A worm gear is inserted into a support rod and threadedly connected to it. The worm gear meshes with a worm and is rotatably mounted on a base.
[0014] The base is characterized by having a first limiting member and a second limiting member spaced apart in the front-rear direction, and the worm gear having a first limiting part and a second limiting part spaced apart in the front-rear direction. In the worm gear and worm drive state, the first limiting part abuts against the first limiting member, or the second limiting part abuts against the second limiting member, and the worm gear and worm are always in a meshing state.
[0015] Preferably, the base has a receiving cavity with a first wall and a second wall spaced apart in the front-rear direction. The second wall has a through hole. The worm gear includes a rod body and teeth on the rod body. The first end of the rod body can extend into the receiving cavity through the through hole and is rotatably mounted on the first wall. The teeth abut against the first wall. The second end of the rod body is outside the receiving cavity. A first limiting member is then mounted on the base and abuts against the second end of the rod body. The second end of the rod body is the first limiting part, the teeth are the second limiting part, and the first wall is the second limiting member. In this way, the second limiting member utilizes the first wall on the base, and both the first and second limiting parts are part of the worm gear itself, resulting in a simplified structure. The first limiting member needs to be designed separately from the base for the installation of the worm gear. After the first end of the worm gear is mounted on the base, the first limiting member is then mounted on the base and abuts against the second end of the rod body. The overall structure is simple and easy to assemble.
[0016] To facilitate the installation of the first limiting member on the base, the base has a vertically penetrating strip hole. The first limiting member has a vertically extending support arm and a latch at the free end of the support arm. The support arm can pass through one end of the strip hole, allowing the latch to snap onto the other end of the strip hole. This simplifies assembly; simply insert the support arm into the strip hole and then snap the latch onto the other end.
[0017] A drive mechanism such as a motor can be used to drive the shaft to rotate, but this involves many components and is costly. Therefore, the second end of the shaft faces forward, and a force-bearing component is fixedly provided at the second end for easy application of force. The front wall plate of the base has a through hole for exposing the force-bearing component. This allows the force-bearing component to be manually rotated, causing it to drive the shaft to rotate. The structure is simple and the cost is low.
[0018] To prevent the force-bearing component from moving axially and affecting the rotation of the shaft, the force-bearing component is provided with a clamping plate and a clamping arm arranged sequentially from front to back. The rear end of the clamping arm is mounted on the force-bearing component, and the front end is a free end that can deflect toward or away from the force-bearing component. The base is provided with a limiting plate, which has a through hole for the shaft and the clamping arm to pass through from front to back. When the clamping arm passes through the through hole, the limiting plate is pressed between the clamping plate and the clamping arm, thus limiting the axial movement of the force-bearing component.
[0019] To prevent the load-bearing component from moving up and down, causing the rotating shaft to move up and down, which in turn causes the worm gear to move up and down and thus cannot properly transmit power with the worm wheel, the longitudinal section of the clamping plate is circular, and the limiting plate is provided with a groove for the clamping plate to be embedded in. The size of the clamping plate matches the groove, but it can rotate relative to the groove. The groove positions the load-bearing component in the vertical direction.
[0020] Preferably, the longitudinal section of the force-bearing component is non-circular to facilitate the tool's rotation.
[0021] Preferably, the front wall panel of the base is provided with an indicator near the through hole to remind the user of the rotation direction and the corresponding lifting direction of the base, so as to facilitate user operation.
[0022] The technical solution adopted by this utility model to solve the second technical problem mentioned above is: a household appliance, characterized in that it includes a housing and the aforementioned base structure, wherein the base structure is disposed at the bottom of the housing.
[0023] The household appliance can be a washing machine, a refrigerator, or a dishwasher, with the interior of the cabinet containing a washing chamber for cleaning tableware and / or fruits and vegetables.
[0024] Compared with the prior art, the advantages of this utility model are as follows: By setting a first limiting member and a second limiting member on the base, and setting a first limiting part and a second limiting part on the worm, in the state of worm gear and worm transmission, the first limiting part can abut against the first limiting member, or the second limiting part can abut against the second limiting member. That is to say, when the first limiting member abuts against the first limiting part, the second limiting member and the second limiting part do not abut against each other, and when the second limiting member and the second limiting part abut against each other, the first limiting member and the first limiting part do not abut against each other. This allows the worm to have a certain axial movement margin when the worm and worm gear are in transmission, to prevent the worm and worm gear from jamming. However, this axial movement margin can also ensure that the worm gear and worm are always in a meshing state to ensure reliable transmission. When the worm gear rotates, the support legs rise and fall to adjust the height of the base. Attached Figure Description
[0025] Figure 1 This is a schematic diagram of the base structure according to an embodiment of the present utility model;
[0026] Figure 2 for Figure 1 A schematic diagram of the structure from another direction;
[0027] Figure 3 for Figure 1 A sectional view;
[0028] Figure 4 for Figure 3 Enlarged view of point A;
[0029] Figure 5 for Figure 3 Enlarged view of point B;
[0030] Figure 6 for Figure 4 A structural diagram of the load-bearing components in the diagram;
[0031] Figure 7 for Figure 1 Another sectional view;
[0032] Figure 8 for Figure 1 Another sectional view;
[0033] Figure 9 for Figure 1 A schematic diagram of the lifting component in the diagram. Detailed Implementation
[0034] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.
[0035] In the description of this utility model, it should be understood that, unless otherwise stated, "multiple" means two or more, and the terms "upper," "lower," "left," "right," "top," "bottom," "front," "rear," etc., indicate the orientation or positional relationship based on the direction or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0036] In the description of this utility model patent, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an adhesive connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model patent based on the specific circumstances.
[0037] like Figures 1-9 As shown, the household appliance in this preferred embodiment is a dishwasher, but it can also be a washing machine, refrigerator, or other household appliances.
[0038] The household appliance includes a cabinet (not shown in the figure) and a base structure. The base structure is located at the bottom of the cabinet, and the inside of the cabinet is a washing chamber for washing tableware and / or fruits and vegetables.
[0039] The base structure includes a base 1, a support rod 2, a lifting assembly, a first limiting member 3, and a second limiting member, etc.
[0040] The base 1 is located at the bottom of the box, the support rod 2 is set vertically, and the bottom of the support rod 2 is provided with a foot 21 for supporting the ground.
[0041] like Figure 3 , 8 As shown in Figure 9, the lifting assembly includes a rotating shaft 4, a worm gear 5, and a worm wheel 6. The rotating shaft 4 extends in the front-to-back direction and can rotate around its axis. One end of the worm gear 5 is coaxial with and fixed to the first end of the rotating shaft 4, and the other end is rotatably mounted on the base 1. The worm wheel 6 is inserted into the support rod 2 and the two are threaded together. The worm wheel 6 and the support rod 2 are driven by a screw and nut. The worm wheel 6 and the worm gear 5 mesh with each other, and the worm wheel 6 is rotatably mounted on the base 1.
[0042] The teeth on the worm gear 6 can be inclined along the axial direction of the worm gear 6. In this way, during the transmission process between the worm gear 6 and the worm 5, the worm 5 will be subjected to not only vertical force but also axial force. If the worm 5 moves too far in the axial direction, it will disengage from the worm gear 6. Therefore, the base 1 is also provided with a first limiting member 3 and a second limiting member that are spaced apart in the front-rear direction. The worm 5 has a first limiting part and a second limiting part that are spaced apart in the front-rear direction. In the transmission state between the worm gear 6 and the worm 5, the first limiting part abuts against the first limiting member 3, or the second limiting part abuts against the second limiting member, and the worm gear 6 and the worm 5 are always in a meshing state.
[0043] In other words, when the first limiting member 3 abuts against the first limiting part, the second limiting member and the second limiting part do not abut against each other; when the second limiting member and the second limiting part abut against each other, the first limiting member 3 and the first limiting part do not abut against each other. This ensures that when the worm 5 and the worm wheel 6 are in transmission, the worm 5 has a certain axial movement margin to prevent the worm 5 and the worm wheel 6 from jamming. However, this axial movement margin can also ensure that the worm wheel 6 and the worm 5 are always in a meshing state to ensure reliable transmission between the two. When the worm wheel 6 rotates, the support rod 2 moves up and down to adjust the height of the base 1.
[0044] like Figure 5 , 7 As shown, the base 1 is provided with a receiving cavity 11. The receiving cavity 11 has a first wall surface 12 and a second wall surface 13 spaced apart in the front-back direction. The second wall surface 13 is provided with a through hole 14. The worm gear 5 includes a rod body 51 and a tooth 52 provided on the rod body 51. The first end of the rod body 51 can extend into the receiving cavity 11 through the through hole 14 and is rotatably mounted on the first wall surface 12. The tooth 52 can abut against the first wall surface 12. The second end of the rod body 51 is located outside the receiving cavity 11. Then, the first limiting member 3 is installed on the base 1 and abuts against the second end of the rod body 51. The second end of the rod body 51 is the first limiting part, the tooth 52 is the second limiting part, and the first wall surface 12 is the second limiting member. In this way, the second limiting member utilizes the first wall surface 12 on the base 1. Both the first and second limiting parts are structures inherent to the worm gear 5 itself, resulting in a simplified structure. The first limiting member 3 needs to be designed separately from the base 1 for the installation of the worm gear 5. After the first end of the worm gear 5 is installed on the base 1, the first limiting member 3 is then installed on the base 1, abutting against the second end of the worm gear 5. The overall structure is simple and easy to assemble. Of course, if the distance between the first limiting member 3 and the second limiting member is very small, the first and second limiting parts can also be the same.
[0045] To facilitate the installation of the first limiting member 3 on the base 1, such as Figure 7 As shown, the base 1 has a vertically penetrating strip hole 15, and the first limiting member 3 has a vertically extending support arm 31 and a latch 32 located at the free end of the support arm 31. The support arm 31 can pass through one end of the strip hole 15, so that the latch 32 can be hooked onto the other end face of the strip hole 15. In this way, it is only necessary to insert the support arm 31 into the strip hole 15 and then hook the latch 32 onto the other end face of the strip hole 15, which is convenient for assembly.
[0046] In this embodiment, the first limiting member 3 is plate-shaped and has a clearance hole 33 for the clearance shaft 4.
[0047] A semi-circular shoulder can be provided on the first wall surface 12, which can partially surround the rod body 51 of the worm 5 to facilitate the assembly of the worm 5.
[0048] In this embodiment, as Figure 1 , 4 As shown in Figure 6, the second end of the rotating shaft 4 faces forward, and a force-bearing component 7 is fixedly provided at the second end for easy application of force. The force-bearing component 7 is columnar and is inserted into the rotating shaft 4. The front wall plate of the base 1 has a through hole 16 for exposing the force-bearing component 7. This allows for adjusting the height of the base 1 without tilting the household appliance, and can be operated directly from the front of the base 1. The longitudinal section of the force-bearing component 7 is non-circular (such as D-shaped or hexagonal) to facilitate the rotation of tools (such as wrenches). A slot can also be provided on the front end face of the force-bearing component 7 to allow a screwdriver to be inserted into the slot to rotate the force-bearing component 7.
[0049] The force-bearing component 7 is provided with a clamping plate 71 and a clamping arm 72 arranged sequentially from front to back. The rear end of the clamping arm 72 is installed on the force-bearing component 7, and the front end is a free end that can deflect toward or away from the force-bearing component 7. The base 1 is provided with a limiting plate 17, which has a through hole 18 for the rotating shaft 4 and the clamping arm 72 to pass through from front to back. When the clamping arm 72 passes through the through hole 18, the limiting plate 17 is pressed between the clamping plate 71 and the clamping arm 72, thus forming an axial limit on the force-bearing component 7. Otherwise, if the force-bearing component 7 moves axially, it will affect the rotation of the rotating shaft 4.
[0050] In addition, in order to prevent the force-bearing component 7 from moving up and down, causing the rotating shaft 4 to move up and down, and causing the worm gear 5 to also move up and down, thus preventing it from transmitting power well with the worm wheel 6, the longitudinal section of the clamping plate 71 is circular, and the limiting plate 17 is provided with a groove 19 for the clamping plate 71 to be embedded in. The size of the clamping plate 71 matches that of the groove 19, but it can rotate relative to the groove 19. The groove 19 positions the force-bearing component 7 in the vertical direction.
[0051] Furthermore, the front wall panel of the base 1 is provided with an indicator 10 near the through hole 16 to remind the user of the rotation direction and the corresponding lifting direction of the base 1, so as to facilitate user operation.
[0052] When adjusting the height of the base 1, according to the indication of the marking section 10, the force-bearing component 7 is rotated by the tool, the rotating shaft 4 rotates accordingly, and drives the worm gear 5 to rotate, then the worm wheel 6 rotates, and the support rod 2 is raised or lowered.
Claims
1. A base structure for household appliances, comprising: Base (1); The support rod (2) is set vertically, and the bottom of the support rod (2) is provided with a foot (21) for supporting on the ground; Lifting assembly, the lifting assembly includes A rotating shaft (4) extends in the front-to-back direction and is capable of rotating about its axis; The worm (5) has one end coaxial with and fixed to the first end of the rotating shaft (4), and the other end is rotatably mounted on the base (1); A worm gear (6) is inserted into the support rod (2) and the two are threaded together. The worm gear (6) meshes with the worm (5). The worm gear (6) is rotatably mounted on the base (1). The base (1) is further provided with a first limiting member (3) and a second limiting member spaced apart in the front-rear direction, and the worm (5) has a first limiting part and a second limiting part spaced apart in the front-rear direction. In the transmission state of the worm wheel (6) and the worm (5), the first limiting part abuts against the first limiting member (3), or the second limiting part abuts against the second limiting member, and the worm wheel (6) and the worm (5) are always in a meshing state.
2. The base structure according to claim 1, characterized in that: The base (1) is provided with a receiving cavity (11), the receiving cavity (11) has a first wall surface (12) and a second wall surface (13) spaced apart in the front-back direction, the second wall surface (13) is provided with a through hole (14), the worm (5) includes a rod body (51) and a tooth (52) provided on the rod body (51), the first end of the rod body (51) can extend into the receiving cavity (11) through the through hole (14) and can be rotatably mounted on the first wall surface (12), the tooth (52) can abut against the first wall surface (12), the second end of the rod body (51) is located outside the receiving cavity (11), and then the first limiting member (3) is mounted on the base (1) and abuts against the second end of the rod body (51), the second end of the rod body (51) is the first limiting part, the tooth (52) is the second limiting part, and the first wall surface (12) is the second limiting member.
3. The base structure according to claim 2, characterized in that: The base (1) is provided with a vertically penetrating strip hole (15), and the first limiting member (3) is provided with a vertically extending support arm (31) and a buckle (32) provided at the free end of the support arm (31). The support arm (31) can pass through the strip hole (15) from one end, so that the buckle (32) buckles against the other end of the strip hole (15).
4. The base structure according to any one of claims 1 to 3, characterized in that: The second end of the rotating shaft (4) faces forward, and a force-bearing member (7) is fixedly provided at the second end to facilitate the application of force. The front wall plate of the base (1) has a through hole (16) for the force-bearing member (7) to be exposed.
5. The base structure according to claim 4, characterized in that: The force-bearing component (7) is provided with a clamping plate (71) and a clamping arm (72) arranged sequentially from front to back. The rear end of the clamping arm (72) is installed on the force-bearing component (7), and the front end is a free end that can deflect toward or away from the force-bearing component (7). The base (1) is provided with a limiting plate (17). The limiting plate (17) is provided with a through hole (18) through which the rotating shaft (4) and the clamping arm (72) pass from front to back. When the clamping arm (72) passes through the through hole (18), the limiting plate (17) is squeezed between the clamping plate (71) and the clamping arm (72).
6. The base structure according to claim 5, characterized in that: The longitudinal section of the card plate (71) is circular. The limiting plate (17) is provided with a groove (19) for the card plate (71) to be embedded in. The card plate (71) and the groove (19) are matched in size but can rotate relative to the groove (19).
7. The base structure according to claim 4, characterized in that: The longitudinal section of the force-bearing component (7) is non-circular, so that the tool can rotate it.
8. The base structure according to claim 4, characterized in that: The front wall of the base (1) is provided with an indicator (10) near the through hole (16) to remind the user of the rotation direction and the corresponding lifting direction of the base (1).
9. A household appliance, characterized in that, It includes a housing and a base structure as described in any one of claims 1 to 8, wherein the base is disposed at the bottom of the housing.
10. The household appliance according to claim 9, characterized in that: The household appliance is a dishwasher, with a washing chamber inside the cabinet for washing tableware and / or fruits and vegetables.