Transmission assembly, water adding device and household appliance

Abstract

The utility model relates to the technical field of kettles, and discloses a transmission assembly, a water adding device and a household appliance, the transmission assembly comprises a first connecting shaft, a second connecting shaft and a third connecting shaft, and a pre-tightening mechanism is arranged between the first connecting shaft and the second connecting shaft; the transmission matching surface of the second connecting shaft and the third connecting shaft is provided with an over-twisting prevention structure; when the torque between the second connecting shaft and the third connecting shaft is larger than the transmission torque, the second connecting shaft can be separated from the third connecting shaft along the anti-over-torque structure, and the torque transmission link is disconnected, so that the driving mechanism is prevented from being damaged, and over-torque protection is achieved.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, specifically to a transmission component, a water filling device, and a household appliance. Background Technology

[0002] Some kitchen appliances and household appliances such as electric kettles use rotating water filling devices to replenish water. Taking an automatic water-filling electric kettle as an example, a motor typically drives the water filling arm to rotate, switching between the initial retracted position and the filling position above the kettle's water inlet. During use, the water filling arm may sometimes encounter obstacles that affect its normal rotation, or it may be forcefully pried open by hand. In these situations, the motor may be damaged, its lifespan shortened, or it may even burn out, compromising the safety of the electric kettle and causing inconvenience to the user. Utility Model Content

[0003] In view of this, the present invention provides a transmission component, a water filling device, and a household appliance to solve the problem that the drive motor is easily damaged when the water filling arm is subjected to large torque.

[0004] In a first aspect, this utility model provides a transmission component, including:

[0005] The first connecting shaft is adapted to be connected to the component to be driven in a transmission manner;

[0006] The third connecting shaft is suitable for transmission connection with the power output end of the drive mechanism;

[0007] The second connecting shaft is driven between the first connecting shaft and the third connecting shaft; a pre-tightening mechanism is provided between the first connecting shaft and the second connecting shaft, which can press the second connecting shaft against the third connecting shaft;

[0008] An anti-torsion structure is provided on the transmission mating surface of the second connecting shaft and the third connecting shaft; when the torque between the second connecting shaft and the third connecting shaft is greater than the transmission torque, the second connecting shaft can disengage from the third connecting shaft along the anti-torsion structure.

[0009] Beneficial Effects: The transmission assembly of this utility model includes a first connecting shaft, a second connecting shaft, and a third connecting shaft. The third connecting shaft transmits the kinetic energy of the drive mechanism to the second connecting shaft, and then transmits the kinetic energy to the driven component through the first connecting shaft, which is connected to the second connecting shaft. This facilitates the rotation of the driven component. Because an anti-over-torque structure is provided on the transmission mating surface between the second and third connecting shafts, when the torque between the second and third connecting shafts exceeds the transmission torque, the second connecting shaft can disengage from the third connecting shaft along the anti-over-torque structure. The torque transmission link is disconnected, preventing damage to the drive mechanism connected to the third connecting shaft, thus achieving over-torque protection. Furthermore, the second connecting shaft is provided between the third connecting shaft (which serves as the power input shaft) and the first connecting shaft (which serves as the power output shaft). When the transmission assembly encounters excessive torque and axially separates, it will not affect the driven component, preventing axial movement of the driven component and avoiding a poor user experience.

[0010] In one optional embodiment, the anti-torsion structure includes:

[0011] A rib is provided on one of the end faces of the second connecting shaft and the third connecting shaft;

[0012] A protrusion is disposed on one of the end faces of the second connecting shaft and the third connecting shaft; the protrusion engages with the rib in a transmission manner.

[0013] Beneficial effects: The convex ribs and convex blocks are connected by a transmission mechanism, serving as both a transmission structure and an anti-over-torsion structure, resulting in a more compact structure.

[0014] In one optional embodiment, the rib is provided with a guide surface, the protrusion is provided with a guide slope, and the rib and the protrusion can disengage from the guide slope along the guide surface.

[0015] Beneficial effects: By setting a guide surface on the rib and cooperating with the guide slope on the protrusion, when the torque is greater than the transmission torque, the rib and the protrusion can be guided and disengaged along the guide surface and the guide slope, the second connecting shaft is disengaged from the third connecting shaft, the transmission process is interrupted, and damage to the drive mechanism is avoided.

[0016] In one optional embodiment, the first connecting shaft is a hollow cylinder, and an annular step is formed within the hollow cavity of the first connecting shaft to divide the hollow cavity into a first connecting cavity and a second connecting cavity; the first connecting shaft further includes:

[0017] A first transmission mating surface is adapted to be connected with the component to be driven, and the first transmission mating surface is disposed in the first connecting cavity;

[0018] The second transmission mating surface is adapted to mate with the second connecting shaft; the second transmission mating surface is disposed in the second connecting cavity; one end of the second connecting shaft passes through the second connecting cavity and overlaps the annular step.

[0019] Beneficial effects: The annular step formed in the hollow cavity of the first connecting shaft can serve as a limiting structure for the second connecting shaft, limiting the axial movement distance of the second connecting shaft, preventing excessive axial movement of the second connecting shaft during the process of disengaging from the third connecting shaft, and improving the reliability of the transmission assembly.

[0020] In one optional embodiment, both the first transmission mating surface and the second transmission mating surface include polygonal mating surfaces.

[0021] Beneficial effects: The transmission mating surfaces include polygonal mating surfaces, and transmission is achieved by utilizing the meshing of polygons. The structure is simple and the transmission reliability is high, making it suitable for torque transmission.

[0022] In one alternative implementation, the second connecting shaft includes:

[0023] The transmission rod has a third transmission mating surface that mates with the first connecting shaft on its top periphery near the first connecting shaft.

[0024] A skirt is provided at the bottom end of the transmission rod near the third connecting shaft; the bottom end of the skirt is provided with a fourth transmission mating surface that mates with the third connecting shaft, and the pre-tightening mechanism abuts against the annular top surface of the skirt.

[0025] Beneficial effects: A skirt is provided at the bottom of the transmission rod to increase the area of ​​the transmission mating surface between the second and third connecting shafts, which also facilitates the setting of an anti-torsion structure; it also facilitates the configuration of a pre-tightening mechanism, so that the pre-tightening force acts on the second connecting shaft, pressing the second connecting shaft against the third connecting shaft, and achieving reliable transmission.

[0026] In one optional embodiment, the top end of the transmission rod is provided with a mounting portion, and a pre-installed component is provided on the mounting portion. The mounting portion can pass through the annular step and be confined within the first connecting cavity by the pre-installed component.

[0027] Beneficial effects: By setting up pre-assembled parts, the second connecting shaft can be initially positioned and fixed in the cavity of the first connecting shaft during the assembly of the transmission components, preventing the second connecting shaft from falling off and improving the ease of installation.

[0028] In one alternative implementation, the third connecting shaft includes:

[0029] The transmission cap is provided with a fifth transmission mating surface that mates with and connects to the fourth transmission mating surface; the anti-over-torsion structure is provided on the fourth transmission mating surface and the fifth transmission mating surface;

[0030] An input shaft is located on the side of the transmission cap away from the fifth transmission mating surface; the input shaft has a shaft hole, and the power output end of the drive mechanism can be matched and disposed in the shaft hole.

[0031] Beneficial effects: The power output end of the drive mechanism is directly set in the shaft hole of the third connecting shaft, which ensures high connection reliability and smooth transmission.

[0032] Secondly, this utility model also provides a water adding device, comprising:

[0033] The water injector has a water supply port;

[0034] Drive mechanism;

[0035] In any of the above-described transmission components, the water injector is connected to the drive mechanism via the transmission component.

[0036] Beneficial effects: The water injector is driven by the transmission component of this invention, and the drive mechanism drives the water injector to rotate, facilitating automatic water filling. When the water injector encounters resistance or a large turning torque, the transmission component can disconnect the transmission due to the anti-torsion structure, avoiding damage to the drive mechanism and improving the safety and reliability of the water filling device. Furthermore, a second connecting shaft is provided between the third connecting shaft (power input shaft) and the first connecting shaft (power output shaft). When the transmission component separates axially due to excessive torque, it will not affect the driven component, making the installation of the driven component more secure and preventing axial movement of the driven component that could cause a poor user experience.

[0037] Thirdly, this utility model also provides a household appliance, including the aforementioned water filling device.

[0038] Beneficial effects: Household appliances include the water filling device of this utility model, and therefore have the same technical effects as water filling devices, which will not be described in detail here.

[0039] In one optional embodiment, the household appliance is an electric kettle, the electric kettle comprising:

[0040] The kettle body is equipped with a water inlet;

[0041] A kettle base, in which the kettle body is placed; a water injector is rotatably mounted on the kettle base, and the water inlet is located on the rotation path of the water supply inlet.

[0042] Beneficial effects: Since the electric kettle includes the water filling device of this utility model, if the water filling device encounters an obstacle during rotation or if the external torque is too large, the transmission component will disconnect, the drive mechanism will not be damaged, and electrical safety will be improved.

[0043] In one alternative embodiment, the transmission assembly is concealed within the kettle seat.

[0044] Beneficial effects: The transmission components are hidden inside the kettle base, making them small in size, saving space on the table, and also more aesthetically pleasing. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the specific embodiments or related technologies of this utility model, the drawings used in the description of the specific embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0046] Figure 1 This is a three-dimensional exploded view of a transmission component according to an embodiment of the present utility model;

[0047] Figure 2 This is a three-dimensional structural diagram of a first connecting shaft according to an embodiment of the present utility model;

[0048] Figure 3 This is a perspective structural diagram of a second connecting shaft according to an embodiment of the present utility model;

[0049] Figure 4 This is a three-dimensional structural diagram of a third connecting shaft according to an embodiment of the present utility model;

[0050] Figure 5 This is an exploded view of the connection structure between a transmission component, water injection, and a motor according to an embodiment of the present invention.

[0051] Figure 6 This is a first-view perspective three-dimensional structural diagram of an electric kettle according to an embodiment of the present utility model;

[0052] Figure 7 This is a second-view perspective three-dimensional structural diagram of an electric kettle according to an embodiment of the present utility model;

[0053] Figure 8 This is a three-dimensional structural diagram of an electric kettle after the kettle body has been removed, according to an embodiment of this utility model.

[0054] Figure 9 This is a three-dimensional structural diagram of a kettle stand according to an embodiment of the present utility model;

[0055] Figure 10This is a three-dimensional structural diagram of a fixing seat for a kettle stand according to an embodiment of the present utility model;

[0056] Figure 11 This is a three-dimensional structural diagram of a support ring for a kettle stand according to an embodiment of the present utility model;

[0057] Figure 12 This is a three-dimensional exploded view of an electric kettle according to an embodiment of the present utility model, where the kettle body is not shown.

[0058] Figure 13 This is an exploded structural diagram of a water injector according to an embodiment of the present utility model;

[0059] Figure 14 This is a three-dimensional structural diagram of a water column added from below according to an embodiment of the present utility model;

[0060] Figure 15 This is a cross-sectional view of an electric kettle according to an embodiment of the present utility model.

[0061] Explanation of reference numerals in the attached figures:

[0062] 1. Pot stand;

[0063] 11. Fixture;

[0064] 111. Make way for the gap;

[0065] 112. Settling tank;

[0066] 114. Install support bars;

[0067] 115. First Installation Section;

[0068] 1151. Positioning hole;

[0069] 12. Support ring;

[0070] 121. Decorative eaves;

[0071] 1211. Through hole; 1212. Decorative part with clearance;

[0072] 122. Ring body;

[0073] 123. Second Installation Section;

[0074] 124. Install the column;

[0075] 2. Water injector;

[0076] 21. Transmission components;

[0077] 211. First connecting shaft;

[0078] 2111, Annular step; 2112, First transmission mating surface; 21121, Positioning groove; 2113, Second transmission mating surface; 2114, Limiting rib; 2115, Clearance window; 2116, Triggering part; 2117, Upper abutment surface;

[0079] 212. Second connecting shaft;

[0080] 2121, Transmission rod; 21211, Third transmission mating surface; 2122, Skirt; 21221, Fourth transmission mating surface; 2123, Pre-assembled part; 2124, Lower abutment surface;

[0081] 213. Third connecting shaft;

[0082] 2131, Transmission cap; 21311, Fifth transmission mating surface; 2132, Input shaft; 21321, Shaft hole;

[0083] 214. Pre-tensioning mechanism;

[0084] 215. Anti-torsion structure;

[0085] 2151, raised rib; 21511, guide surface; 2152, protrusion; 21521, guide ramp;

[0086] 22. Add a water column below;

[0087] 221. Pipe fitting body;

[0088] 2211, Water inlet; 2212, Fitting structure; 22121, Positioning rib; 2213, Upper shoulder; 2214, Lower shoulder; 2215, Connecting column;

[0089] 222. Rotary arm;

[0090] 2221. Water inlet; 2222. Tank cavity; 2223. Fastener;

[0091] 223. First connecting pipe;

[0092] 224. First connector;

[0093] 225. Second connector;

[0094] 23. Top cover;

[0095] 3. Positioning plate;

[0096] 31. Limiting ribs;

[0097] 4. Second connecting pipe;

[0098] 5. Electric motor;

[0099] 6. Water pump;

[0100] 7. Photoelectric switch;

[0101] 8. The body of the pot;

[0102] 81. Spout;

[0103] 82. Water injection port;

[0104] 83. Teapot handle. Detailed Implementation

[0105] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0106] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0107] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 electrical 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 according to the specific circumstances.

[0108] The following is combined with Figures 1 to 15 The following describes embodiments of the present invention.

[0109] According to an embodiment of the present invention, in one aspect, a transmission assembly 21 is provided, comprising:

[0110] The first connecting shaft 211 is adapted to be connected to the component to be driven in a transmission manner;

[0111] The third connecting shaft 213 is suitable for transmission connection with the power output end of the drive mechanism;

[0112] The second connecting shaft 212 is driven between the first connecting shaft 211 and the third connecting shaft 213; a pre-tightening mechanism 214 is provided between the first connecting shaft 211 and the second connecting shaft 212, which can press the second connecting shaft 212 against the third connecting shaft 213;

[0113] An anti-torsion structure 215 is provided on the transmission mating surface of the second connecting shaft 212 and the third connecting shaft 213; when the torque between the second connecting shaft 212 and the third connecting shaft 213 is greater than the transmission torque, the second connecting shaft 212 can disengage from the third connecting shaft 213 along the anti-torsion structure 215.

[0114] The transmission assembly 21 includes a first connecting shaft 211, a second connecting shaft 212, and a third connecting shaft 213. The third connecting shaft 213 transmits the kinetic energy of the drive mechanism to the second connecting shaft 212, and then transmits the kinetic energy to the driven component through the first connecting shaft 211, which is connected to the second connecting shaft 212. This facilitates the rotation of the driven component. Since an anti-over-torsion structure 215 is provided on the transmission mating surface between the second connecting shaft 212 and the third connecting shaft 213, when the torque between the second connecting shaft 212 and the third connecting shaft 213 is greater than the transmission torque, the second connecting shaft 212 can disengage from the third connecting shaft 213 along the anti-over-torsion structure 215. The torque transmission link is disconnected, preventing damage to the drive mechanism connected to the third connecting shaft 213, thereby achieving over-torsion protection. Furthermore, a second connecting shaft 212 is provided between the third connecting shaft 213, which serves as the power input shaft 2132, and the first connecting shaft 211, which serves as the power output shaft. When the transmission assembly 21 encounters excessive torque and axial separation, it will not affect the driven component, thus preventing the driven component from axially shifting and causing a poor user experience.

[0115] In some embodiments, the anti-torsion structure 215 includes:

[0116] A rib 2151 is provided on one of the end faces of the second connecting shaft 212 and the third connecting shaft 213;

[0117] The protrusion 2152 is disposed on one of the end faces of the second connecting shaft 212 and the third connecting shaft 213; the protrusion 2152 and the rib 2151 are in a transmission engagement.

[0118] The transmission connection is achieved by using ribs 2151 and protrusions 2152, which serve as both a transmission structure and an anti-over-torsion structure 215. The design is reasonable and the structure is more compact.

[0119] In some embodiments, the rib 2151 is provided with a guide surface 21511, and the protrusion 2152 is provided with a guide slope 21521. The rib 2151 and the protrusion 2152 can disengage from the guide slope 21521 along the guide surface 21511.

[0120] A guide surface 21511 is provided on the rib 2151, which cooperates with the guide slope 21521 on the protrusion 2152. When the torque is greater than the transmission torque, the rib 2151 and the protrusion 2152 can be guided and disengaged along the guide surface 21511 and the guide slope 21521, and the second connecting shaft 212 is disengaged from the third connecting shaft 213. The transmission process is interrupted to avoid damage to the drive mechanism.

[0121] In some embodiments, such as Figure 2 As shown, the first connecting shaft 211 is a hollow cylinder, and an annular step 2111 is formed in the hollow cavity of the first connecting shaft 211, dividing the hollow cavity into a first connecting cavity and a second connecting cavity; the first connecting shaft 211 also includes:

[0122] The first transmission mating surface 2112 is adapted to be connected with the component to be driven, and the first transmission mating surface 2112 is disposed in the first connecting cavity;

[0123] The second transmission mating surface 2113 is adapted to mate with the second connecting shaft 212; the second transmission mating surface 2113 is disposed in the second connecting cavity; one end of the second connecting shaft 212 passes through the second connecting cavity and overlaps the annular step 2111.

[0124] The annular step 2111 formed in the hollow cavity of the first connecting shaft 211 can serve as a limiting structure for the second connecting shaft 212, limiting the axial movement distance of the second connecting shaft 212, preventing excessive axial movement of the second connecting shaft 212 during the process of disengaging from the third connecting shaft 213, and improving the reliability of the transmission assembly 21.

[0125] As shown in the figure, a positioning groove 21121 is also provided on the first transmission mating surface 2112, which is suitable for engaging with the positioning rib 22121 of the water injector 2 to prevent mistaken connection. Two limiting ribs 2114 are also provided on the top outer periphery of the first transmission mating surface 2112. The two limiting ribs 2114 are spaced apart and can cooperate with the limiting ribs 31 on the surrounding environmental parts to limit the rotation angle of the transmission assembly 21.

[0126] It should be noted that a clearance window 2115 is also provided on the pipe wall of the first connecting shaft 211, which allows the water supply pipe to be led out to the second connecting pipe 4 for external water supply device. The first connecting shaft 211 will not drive the water supply pipe to move during rotation, so the water supply pipe will not be bent or other problems, thus extending the service life of the water supply pipe.

[0127] In some embodiments, both the first transmission mating surface 2112 and the second transmission mating surface 2113 include polygonal mating surfaces. The transmission mating surfaces include polygonal mating surfaces, utilizing the meshing of polygons to achieve transmission, resulting in a simple structure, high transmission reliability, and suitability for torque transmission.

[0128] In some embodiments, such as Figure 3 As shown, the second connecting shaft 212 includes:

[0129] The transmission rod 2121 has a third transmission mating surface 21211 that mates with the first connecting shaft 211 on its top periphery near the first connecting shaft 211;

[0130] Skirt 2122 is located at the bottom end of transmission rod 2121 near the third connecting shaft 213; the bottom end of skirt 2122 is provided with a fourth transmission mating surface 21221 that mates with the third connecting shaft 213, and pre-tightening mechanism 214 abuts against the annular top surface of skirt 2122.

[0131] A skirt 2122 is provided at the bottom end of the transmission rod 2121 to increase the area of ​​the transmission mating surface between the second connecting shaft 212 and the third connecting shaft 213, which also facilitates the setting of the anti-over-torsion structure 215; it also facilitates the configuration of the pre-tightening mechanism 214, so that the pre-tightening force acts on the second connecting shaft 212, pressing the second connecting shaft 212 against the third connecting shaft 213 to achieve reliable transmission.

[0132] In some embodiments, the top end of the transmission rod 2121 is provided with a mounting portion, and a pre-installed component 2123 is provided on the mounting portion. The mounting portion can pass through the annular step 2111 and be confined within the first connecting cavity by the pre-installed component 2123.

[0133] Specifically, the pre-installed component 2123 is a screw with a relatively large screw head, which can support the second connecting shaft 212 within the hollow cavity of the first connecting shaft 211, facilitating installation. The second connecting shaft 212 can be connected to the annular step 2111 by screws.

[0134] By setting up pre-installed component 2123, during the assembly of transmission component 21, the second connecting shaft 212 can be initially positioned and fixed in the cavity of the first connecting shaft 211 to prevent the second connecting shaft 212 from falling off and improve the ease of installation.

[0135] In some embodiments, such as Figure 4 As shown, the third drive shaft includes:

[0136] The transmission cap 2131 is provided with a fifth transmission mating surface 21311 that is connected to the fourth transmission mating surface 21221; the anti-over-torsion structure 215 is provided on the fourth transmission mating surface 21221 and the fifth transmission mating surface 21311.

[0137] The input shaft 2132 is located on the side of the transmission cap 2131 away from the fifth transmission mating surface 21311; the input shaft 2132 is provided with a shaft hole 21321, and the power output end of the drive mechanism can be matched and set in the shaft hole 21321.

[0138] The power output end of the drive mechanism is directly set in the shaft hole 21321 of the shaft inlet of the third transmission shaft, which ensures high connection reliability and smooth transmission.

[0139] According to an embodiment of the present invention, another aspect provides a water adding device, comprising:

[0140] Water injector 2 has a water supply port 2221;

[0141] Drive mechanism;

[0142] The water injector 2 is connected to the drive mechanism via the transmission assembly 21.

[0143] The water injector 2 is driven by the transmission component 21 of this invention, and the drive mechanism drives the water injector 2 to rotate, facilitating automatic water filling. When the water injector 2 encounters resistance or a large turning torque, the transmission component 21 can disconnect the transmission by relying on the anti-over-torsion structure 215, avoiding damage to the drive mechanism and improving the safety and reliability of the water filling device. Moreover, a second connecting shaft 212 is provided between the third connecting shaft 213, which serves as the power input shaft 2132, and the first connecting shaft 211, which serves as the power output shaft. When the transmission component 21 encounters excessive torque and axially separates, it will not affect the driven component, making the installation of the driven component more secure and preventing axial movement of the driven component from causing a bad user experience.

[0144] Specifically, the drive mechanism includes motor 5.

[0145] According to an embodiment of the present invention, in another aspect, a household appliance is also provided, including the above-mentioned water filling device.

[0146] Household appliances include the water filling device of this utility model, and therefore have the same technical effects as the water filling device, which will not be described in detail here.

[0147] Household appliances can include electric kettles, electric tea stoves, cooking appliances, and dishwashers, as well as appliances that can automatically add water or water tanks that can automatically fill water; there are no specific limitations here.

[0148] In some embodiments, such as Figures 6-8 , Figure 12 and Figure 15 As shown, the household appliance is an electric kettle, which includes:

[0149] The kettle body 8 is provided with a water inlet 82; the top of the kettle body 8 is provided with a handle 83;

[0150] The kettle base 1 and the kettle body 8 are placed in the receiving cavity of the kettle base 1; the water injector 2 is rotatably set on the kettle base 1, and the water inlet 82 is located on the rotation path of the water supply inlet 2221.

[0151] Since the electric kettle includes the water filling device of this utility model, if the water filling device encounters an obstacle during rotation or if the external torque is too large, the transmission component 21 will disconnect, so that the drive mechanism will not be damaged, thus improving electrical safety.

[0152] like Figures 9-11 As shown, a specific embodiment of this utility model provides a kettle stand 1, comprising:

[0153] The fixing base 11 has a cylindrical structure with an open top, and the inner cavity of the cylindrical fixing base 11 is suitable for accommodating the kettle body 8 of the electric kettle.

[0154] The mounting structure is at least partially disposed on the fixed base 11; the mounting structure includes a first mounting part 115, through which the water injector 2 of the electric kettle can be disposed on the periphery of the fixed base 11.

[0155] The base 11 of the kettle stand 1 forms a cylindrical structure with an open top. The kettle body 8 can be placed in the inner cavity of the base 11 for heating. Since the water injector 2 is set on the periphery of the base 11 through the first mounting part 115, the kettle body 8 will not interfere with the water injector 2 no matter which direction it is taken out or put in, which improves convenience and user experience. Moreover, a hole can be made in the table surface on which the electric kettle is placed, so that the base 11 can be directly sunk below the table surface, reducing the space occupied on the table surface. Since the kettle body 8 is contained in the inner cavity of the base 11, the surface of the kettle body 8 is isolated, avoiding burns caused by accidentally touching the hot kettle body 8. The kettle body 8 is also not easy to tip over by external force, which improves the safety of use, especially reducing the risk of burns to children.

[0156] Specifically, the first mounting part 115 includes a positioning ear located at the bottom of the side wall of the fixed base 11, and a positioning hole 1151 is provided on the positioning ear to facilitate the installation and positioning of the water injector 2.

[0157] In some embodiments, the kettle base 1 further includes:

[0158] The support ring 12 is located at the opening of the fixed base 11; part of the mounting structure is located on the support ring 12.

[0159] A support ring 12 is provided at the opening of the fixed base 11, which hides the transmission component 21 of the water injector 2 under the support ring 12, improving the aesthetics; and it also allows some of the mounting structure to be set on the support ring 12, improving the ease of assembly of the electric kettle parts.

[0160] In some embodiments, the support ring 12 includes:

[0161] The ring body 122 is a tubular structure with openings at both ends;

[0162] A decorative eave 121 is provided at the first end of the ring body 122, and the support ring 12 is connected to the fixed base 11 through the decorative eave 121; the second end of the ring body 122 extends into the inner cavity of the fixed base 11; a through hole 1211 for the water injector 2 to pass through is provided on the decorative eave 121.

[0163] The support ring 12 is attached to the fixed seat 11 by the decorative eaves 121 at the first end of the ring body 122; the second end of the ring body 122 extends into the inner cavity of the fixed seat 11. The decorative eaves 121 serve a decorative purpose and shield the fixed seat 11 and the parts installed on the pot seat 1. In addition to improving the aesthetics, it also provides a certain degree of protection.

[0164] In some embodiments, the mounting structure includes a second mounting portion 123 disposed on the underside of the decorative eaves 121.

[0165] The mounting structure located on the underside of the decorative eaves 121 can conveniently limit and fix the components and other devices of the water injector 2, effectively utilize space, and improve connection reliability.

[0166] In some embodiments, the support ring 12 is detachably mounted on the fixing base 11.

[0167] The support ring 12 and the fixed base 11 are installed together in a detachable manner, which is convenient for maintenance; it is also convenient to manufacture separately and then reassemble them, simplifying the manufacturing process.

[0168] In some embodiments, a clearance notch 111 is formed at the edge of the fixing seat 11.

[0169] A notch 111 is provided at the edge of the fixed base 11 to allow the spout 81 of the kettle body 8 to extend out. This reduces the volume of the kettle base 1 and facilitates the release and diffusion of steam.

[0170] In some embodiments, the support ring 12 has a relief decoration portion 1212 formed at the relief notch 111.

[0171] Corresponding to the clearance notch 111, a recessed clearance decorative part 1212 is provided on the support ring 12, which also serves to cover and decorate, prevent dust and foreign objects from entering the gap, and improve the overall appearance and aesthetics.

[0172] In some embodiments, such as Figures 10-12As shown, the fixing base 11 has a cylindrical structure. A notch 111 is provided at the edge of the opening of the fixing base 11 to allow space for the spout 81. A groove 112 is provided on the side wall of the fixing base 11, and a through-hole is provided on the bottom surface of the groove 112. A mounting post 124 is provided on the side wall of the ring body 122 of the support ring 12. The mounting post 124 is correspondingly positioned in the groove 112, and its bottom end extends through the slot. Multiple mounting support ribs 114 are distributed on the bottom surface of the inner cavity of the fixing base 11 to provide support for the support ring 12 and to reserve installation space for the electric heating assembly.

[0173] In some embodiments, the transmission assembly 21 is concealed within the kettle seat 1.

[0174] The moving component is hidden inside the kettle base 1. It is small in size, does not take up space on the table, and is also more aesthetically pleasing.

[0175] In some embodiments, the electric kettle is further provided with a water dispenser 2 arrival detection device. The arrival detection device includes:

[0176] Photoelectric switch 7 is connected to the controller of the electric kettle; the controller is also connected to the drive mechanism;

[0177] The trigger structure is located at the top of the first connecting shaft 211.

[0178] When the transmission assembly 21 rotates to a specific position (i.e., the position corresponding to when the water supply port 2221 rotates above the water inlet 82), the trigger structure moves between the transmitter and receiver of the photoelectric switch 7, blocking the light transmission between them. The photoelectric switch 7 then sends a signal back to the controller. Upon receiving the signal, the controller stops the drive mechanism, thus achieving automatic positioning detection and control. The controller is also connected to the water pump 6 or the water supply switch. While stopping the drive mechanism, it simultaneously starts the water pump 6 or opens the water supply switch, allowing water to be automatically supplied to the water inlet 82 via the water supply device.

[0179] like Figures 12-14 As shown, the water column 22 below includes:

[0180] The main body of the pipe fitting 221 has a water inlet hole 2211 at the water inlet end;

[0181] A swivel arm 222 is located at the outlet end of the pipe body 221. The swivel arm 222 has a groove-shaped structure with an open top surface. A water inlet 2221 is provided on the bottom side of the swivel arm 222, and a water filling channel is formed between the water inlet 2211 and the water inlet 2221.

[0182] The main body 221 of the pipe fitting has a mating structure 2212 formed on its periphery near its water inlet end. The mating structure 2212 is adapted to be connected to the drive mechanism through the transmission assembly 21. The drive mechanism can drive the lower water column 22 to rotate so that the water supply port 2221 moves above the water-using device.

[0183] The lower water column 22 includes a pipe body 221 and a rotating arm 222. A water inlet 2211 on the pipe body 221 and a water supply port 2221 on the rotating arm 222 form a water filling channel. The water filling structure is simple, easy to assemble, improves assembly efficiency, and is also easy to maintain.

[0184] In some embodiments, the water column 22 further includes:

[0185] The first connecting pipe 223 is disposed in the groove 2222 of the rotating arm 222;

[0186] The first connector 224 is disposed in the groove 2222 of the rotating arm 222; the first end of the first connector 224 is connected to the end of the first connecting pipe 223 near the water supply port 2221, and the second end of the first connector 224 is connected to the water supply port 2221.

[0187] The second connector 225 is partially disposed in the groove 2222 of the rotating arm 222; the first end of the second connector 225 is connected to the end of the first connecting pipe 223 near the main body 221 of the pipe fitting, and the second end of the second connector 225 is connected to the main body 221 of the pipe fitting and communicates with the water inlet 2211.

[0188] The first connecting pipe 223 is connected to the water supply port 2221 and the water inlet 2211 through the first connector 224 and the second connector 225 respectively, which can ensure water quality safety, facilitate the use of different materials for the water flow channel and the rotating arm 222, and also ensure sealing performance.

[0189] In some embodiments, the circumferential side of the pipe body 221 is provided with an upper shoulder 2213 and a lower shoulder 2214, which are suitable for connection with the environmental component to achieve axial positioning of the lower water column 22.

[0190] An upper shoulder 2213 and a lower shoulder 2214 are provided on the pipe body 221 to facilitate axial positioning of the pipe body 221 and improve installation reliability.

[0191] In some embodiments, a connecting post 2215 is provided at the bottom end of the pipe body 221, and a water inlet 2211 is located at the end of the connecting post 2215; a mating structure 2212 is provided between the connecting post 2215 and the lower shoulder 2214.

[0192] A connecting post 2215 is provided at the bottom of the pipe body 221 to facilitate connection with the water supply pipe and improve assembly convenience.

[0193] In some embodiments, the water column 22 further includes:

[0194] Positioning ribs 22121 or positioning grooves 21121 are provided at the mating structure 2212 and are suitable for matching and connecting with positioning grooves 21121 or positioning ribs 22121 on the transmission assembly 21.

[0195] The water column 22 and the transmission assembly 21 are provided with positioning ribs 22121 and positioning grooves 21121, which can prevent mistakes during the installation process and improve installation efficiency.

[0196] In some embodiments, the rotating arm 222 is provided with a latch 2223, and the upper cover 23 is provided with a buckle. The upper cover 23 is detachably connected to the rotating arm 222 through the engagement of the buckle and the latch 2223. The buckle engages with the latch 2223, thereby detachably installing the upper cover 23 on the rotating arm 222 of the lower water column 22, which facilitates disassembly and assembly.

[0197] In some embodiments, the electric kettle further includes a positioning plate 3, which has mounting holes for the water injector 2 and fixing holes for engaging with the kettle base 1. As an environmental component for the water injector 2, a limiting rib 31 is also provided on the bottom side of the positioning plate 3. When the two limiting ribs 2114 on the first connecting shaft 211 rotate to the limiting rib 31, they are stopped. A sensor mounting structure is also provided on the bottom side of the positioning plate 3, and a photoelectric switch 7 is mounted on the mounting structure.

[0198] The water injector 2 includes an upper cover 23, a first connector 224, a first connecting pipe 223, a second connector 225, a connector sealing ring, a lower water column 22 sealing ring, and a lower water column 22. One end of the first connector 224 is connected to the first connecting pipe 223, and the other end of the first connector 224 is the water outlet, allowing water to be added to the water inlet 82 of the lid. One end of the second connector 225 is connected to the first connecting pipe 223, and the other end of the second connector 225 is the water inlet, sealed to the lower water column 22 by two connector sealing rings. The first connector 224, the first connecting pipe 223, and the second connector 225 are installed together in the mounting cavity of the lower water column 22, and the upper cover 23 is fastened to the rotating arm 222 of the lower water column 22 by a snap-fit. The lower end of the lower water column 22 is connected to the water outlet of the water pump 6 through the second connecting pipe 4.

[0199] A positioning plate 3 is installed on the support ring 12. The positioning plate 3 is fastened to the support ring 12 by two screws. The positioning plate 3 has multiple through holes 1211 in the middle and a snap-fit ​​structure around its perimeter. The lower water column 22 is snapped and fixed to the positioning plate 3. The positioning plate 3 has an upper limit surface and a lower limit surface, which cooperate with the upper and lower limit surfaces of the lower water column 22 to limit the upper and lower positions of the lower water column 22. The lower water column 22 has a sealing ring mounting groove, and a sealing ring is provided between the support ring 12 and the lower water column 22 to prevent the ingress of external water.

[0200] A torque transmission assembly 21 is provided between the lower water column 22 and the motor 5. The transmission assembly 21 includes a first connecting shaft 211, a second connecting shaft 212, and a third connecting shaft 213. The first connecting shaft 211 has holes at both its upper and lower ends, and its upper end is fitted onto the lower end of the lower water column 22. Both the first connecting shaft 211 and the lower water column 22 have polygonal mating surfaces. The polygonal mating surface of the lower water column 22 has a positioning rib 22121, and the polygonal mating surface of the first connecting shaft 211 has a positioning groove 21121. The two are connected and transmitted through the polygonal mating surfaces. The mating of the positioning rib 22121 and the positioning groove 21121 prevents incorrect installation direction during assembly and makes the connection and transmission between the two more reliable. The second connecting pipe 4, which connects the lower end of the lower water column 22 to the water pump 6, is introduced through an access notch on the first connecting shaft 211. The lower end of the first connecting shaft 211 and the upper end of the second connecting shaft 212 are also connected by a polygonal hole shaft for transmission.

[0201] A torsion spring serving as a pre-tightening mechanism 214 is installed between the first connecting shaft 211 and the second connecting shaft 212. The upper end of the torsion spring abuts against the upper abutment surface 2117 at the lower end of the first connecting shaft 211, and the lower end of the torsion spring abuts against the lower abutment surface 2124 of the second connecting shaft 212. The second connecting shaft 212 is movably connected to the first connecting shaft 211 by fastening screws. The lower end of the second connecting shaft 212 is provided with a transmission rib 2151, and the third connecting shaft 213 is provided with a transmission protrusion. The shaft hole 21321 at the lower end of the third connecting shaft 213 is interference-fitted with the flat rotating shaft of the motor 5. When water is added, the motor 5 drives the third connecting shaft 213 to rotate, which in turn drives the second connecting shaft 212 to rotate, which in turn drives the first connecting shaft 211 to rotate. The first connecting shaft 211 drives the lower water column 22 to rotate above the water inlet 82 of the kettle lid. The water pump 6 is connected to the lower water column 22, and automatic water addition is achieved by controlling the opening of the water pump 6.

[0202] To prevent damage to the motor 5 from excessive force applied to the water injector 2, an over-torque protection structure is implemented. This structure includes a third connecting shaft 213, an over-torque spring serving as a pre-tightening mechanism 214, and a second connecting shaft 212. The third connecting shaft 213 has a protrusion 2152 with a guide slope 21521, and the second connecting shaft 212 has a rib 2151 with a guide slope 21521. Under normal conditions, the over-torque spring presses the second connecting shaft 212 downwards against the third connecting shaft 213, and the protrusion on the third connecting shaft 213 drives the rib 2151 on the second connecting shaft 212. Because the rib 2151 on the second connecting shaft 212 and the protrusion on the third connecting shaft 213 are guided by slopes, when subjected to excessive external force, the second connecting shaft 212 will compress the over-torque spring, separating from the third connecting shaft 213 and spinning freely, thus providing over-torque protection for the motor 5. The motor 5 drives the lower water column 22 to rotate, allowing it to rotate between the initial position and the water-filling position.

[0203] A positioning plate 3 is fixed on the support ring 12, and a photoelectric switch 7 is installed on the positioning plate 3. The photoelectric switch 7 is provided with a slot sensing part. The motor 5 drives the first connecting shaft 211 and the lower water column 22 to rotate through the transmission. The first connecting shaft 211 is provided with a trigger part 2116. When the lower water column 22 rotates to directly above the water inlet 82, the trigger part 2116 of the first connecting shaft 211 rotates into the slot sensing part of the photoelectric switch 7. The photoelectric switch 7 receives the signal that the lower water column 22 has rotated into position and transmits it to the control unit of the electric kettle, controlling the motor 5 to stop rotating and simultaneously controlling the water pump 6 to start working to add water into the kettle.

[0204] The positioning plate 3 is provided with limiting ribs, and the first connecting shaft 211 is provided with a first limiting rib 2114 and a second limiting rib 2114. When the water column is in the initial position, the first limiting rib 2114 engages with the front of the limiting rib 31. When the water column is in the water filling position, the second limiting rib 2114 engages with the back of the limiting rib 31, thereby limiting the rotation angle of the lower water column 22 between the initial position and the water filling position. After water filling is completed, the lower water column 22 returns to the initial position.

[0205] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A transmission component, characterized in that, include: The first connecting shaft (211) is adapted to be connected to the component to be driven in a transmission manner; The third connecting shaft (213) is suitable for transmission connection with the power output end of the drive mechanism; The second connecting shaft (212) is driven between the first connecting shaft (211) and the third connecting shaft (213); a pre-tightening mechanism (214) is provided between the first connecting shaft (211) and the second connecting shaft (212) to press the second connecting shaft (212) against the third connecting shaft (213); An anti-torsion structure (215) is provided on the transmission mating surface of the second connecting shaft (212) and the third connecting shaft (213); when the torque between the second connecting shaft (212) and the third connecting shaft (213) is greater than the transmission torque, the second connecting shaft (212) can disengage from the third connecting shaft (213) along the anti-torsion structure (215).

2. The transmission assembly according to claim 1, characterized in that, The anti-torsion structure (215) includes: A rib (2151) is provided on one of the end faces of the second connecting shaft (212) and the third connecting shaft (213); A protrusion (2152) is disposed on one of the end faces of the second connecting shaft (212) and the third connecting shaft (213); the protrusion (2152) is in a transmission engagement with the rib (2151).

3. The transmission assembly according to claim 2, characterized in that, The rib (2151) is provided with a guide surface (21511), and the protrusion (2152) is provided with a guide slope (21521). The rib (2151) and the protrusion (2152) can disengage from the guide slope (21521) along the guide surface (21511).

4. The transmission assembly according to claim 1, characterized in that, The first connecting shaft (211) is a hollow cylinder, and an annular step (2111) is formed in the hollow cavity of the first connecting shaft (211), dividing the hollow cavity into a first connecting cavity and a second connecting cavity; the first connecting shaft (211) further includes: The first transmission mating surface (2112) is adapted to be connected with the component to be driven, and the first transmission mating surface (2112) is disposed in the first connecting cavity; The second transmission mating surface (2113) is adapted to be mated and connected with the second connecting shaft (212); the second transmission mating surface (2113) is disposed in the second connecting cavity; one end of the second connecting shaft (212) passes through the second connecting cavity and overlaps the annular step (2111).

5. The transmission assembly according to claim 4, characterized in that, Both the first transmission mating surface (2112) and the second transmission mating surface (2113) include polygonal mating surfaces.

6. The transmission assembly according to claim 4, characterized in that, The second connecting shaft (212) includes: The transmission rod (2121) has a third transmission mating surface (21211) that mates with the first connecting shaft (211) on its top periphery near the first connecting shaft (211); A skirt (2122) is provided on the transmission rod (2121) near the bottom end of the third connecting shaft (213); the bottom end of the skirt (2122) is provided with a fourth transmission mating surface (21221) that mates with the third connecting shaft (213), and the pre-tightening mechanism (214) abuts against the annular top surface of the skirt (2122).

7. The transmission assembly according to claim 6, characterized in that, The top end of the transmission rod (2121) is provided with a mounting part, and a pre-installed part (2123) is provided on the mounting part. The mounting part can pass through the annular step (2111) and be confined within the first connecting cavity by the pre-installed part (2123).

8. The transmission assembly according to claim 6 or 7, characterized in that, The third connecting shaft (213) includes: The transmission cap (2131) is provided with a fifth transmission mating surface (21311) that is connected to the fourth transmission mating surface (21221); the anti-torsion structure (215) is provided on the fourth transmission mating surface (21221) and the fifth transmission mating surface (21311); An input shaft (2132) is disposed on the side of the transmission cap (2131) away from the fifth transmission mating surface (21311); a shaft hole (21321) is provided on the input shaft (2132), and the power output end of the drive mechanism can be matched and disposed in the shaft hole (21321).

9. A water-adding device, characterized in that, include: Water injector (2), with water supply port (2221); Drive mechanism; The transmission assembly (21) according to any one of claims 1 to 8, wherein the water injector (2) is connected to the drive mechanism via the transmission assembly (21).

10. A household appliance, characterized in that, Includes the water adding device as described in claim 9.

11. The household appliance according to claim 10, characterized in that, The household appliance is an electric kettle, which includes: The kettle body (8) is provided with a water inlet (82); The kettle base (1) is placed in the receiving cavity of the kettle base (1); the water injector (2) is rotatably disposed on the kettle base (1), and the water inlet (82) is located on the rotation path of the water supply inlet (2221).

12. The household appliance according to claim 11, characterized in that, The transmission component (21) is hidden inside the kettle seat (1).

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