Stirring device and milk foam machine

Abstract

The utility model discloses a stirring device and a milk foam machine, and belongs to the technical field of milk foam machines, the stirring device comprises a rotating shaft assembly and a stirring assembly, the rotating shaft assembly is arranged in a milk foam machine body, the rotating shaft assembly comprises a supporting base and a rotating shaft main body, the supporting base is fixedly connected with the bottom wall of the milk foam machine body, and the rotating shaft main body is fixedly connected with the rotating shaft main body. The rotating shaft main body is coaxially arranged on the supporting base; a guide inclined surface is formed at the joint of the supporting base and the rotating shaft main body along the circumferential direction; the stirring assembly sleeves the rotating shaft main body and can rotate around the rotating shaft main body, a positioning slope is formed on the stirring assembly corresponding to the guide slope, and the positioning slope is in contact fit with the guide slope and can rotate relative to the guide slope. The milk foam machine comprises a milk foam machine body and the stirring device. Through cooperation of the rotating shaft assembly and the stirring assembly, the rotating stability of the stirring assembly is improved, the problems that in the prior art, blades and a rotating shaft are not stably matched and are prone to shaking and deviation are solved, and efficient and stable operation of the stirring assembly is achieved.

Description

Technical Field

[0001] This utility model relates to the field of milk frother technology, and in particular to a stirring device and a milk frother. Background Technology

[0002] A milk frother is a kitchen appliance specifically designed to process milk to produce rich, fine milk foam. Its main function is to transform milk into dense, soft foam through specific methods such as stirring, whipping, or heating. The component in a milk frother that provides the power to create foam is called a paddle. Inside the cup is a rotating shaft around which the paddle rotates, thoroughly incorporating air into the milk to form foam.

[0003] In existing milk frother designs, the most common method is to connect the blades and the shaft using a simple sleeve or snap-fit ​​connection, with the contact surfaces of the blades and shaft typically being flat. During rotation, the blades are prone to wobbling and misalignment, resulting in poor mixing and an inability to fully churn the milk into a fine, uniform foam. Furthermore, the unstable motion increases friction and wear between the blades and the shaft, reducing the equipment's lifespan and potentially generating significant noise, negatively impacting the user experience. In addition, the lack of a fixed rotation path for the blades can lead to uneven stress within the milk frother, increasing the risk of damage. Utility Model Content

[0004] The purpose of this invention is to provide a stirring device and a milk frother to solve the technical problem in the prior art where the blades and shaft of the milk frother are not properly matched, and the machine is prone to shaking and deviating during rotation.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] On the one hand, this utility model provides a stirring device, comprising:

[0007] A rotating shaft assembly is disposed within the body of the milk frother. The rotating shaft assembly includes a support base and a rotating shaft body. The support base is fixedly connected to the bottom wall of the milk frother body. The rotating shaft body is coaxially disposed on the support base. The connection between the support base and the rotating shaft body forms a guide slope along its circumference.

[0008] A stirring assembly is sleeved on the rotating shaft body and can rotate around the rotating shaft body. A positioning inclined surface is formed on the stirring assembly corresponding to the guide inclined surface. The positioning inclined surface contacts and cooperates with the guide inclined surface and can rotate relative to the guide inclined surface.

[0009] Preferably, the guide slope and the support base form a first included angle, which is an obtuse angle.

[0010] Preferably, the positioning slope and the guide slope have the same inclination angle and can fit together with the guide slope.

[0011] Preferably, the guide slope and / or the positioning slope are provided with a wear-resistant coating.

[0012] Preferably, the stirring device further includes a turbulence-disrupting component, which includes turbulence-disrupting blades and a sleeve. The turbulence-disrupting blades are fixedly connected to the outer periphery of the sleeve, and the sleeve is coaxially connected to the rotating shaft body and is fixed relative to the rotating shaft body.

[0013] Preferably, the stirring assembly includes a housing and a blade, the blade is connected to the housing, the housing is located at the bottom of the blade, a connecting hole is formed through the middle of the housing, the connecting hole is fitted onto the rotating shaft body, and the bottom of the connecting hole extends obliquely to form the positioning slope.

[0014] Preferably, the stirring assembly further includes a fixed frame, which is disposed above and connected to the housing. The fixed frame is annular, and the blades are disposed inside the fixed frame. Multiple blades are provided, and the multiple blades are arranged at intervals along the circumference of the rotating shaft body.

[0015] Preferably, the housing includes a housing base and a housing cover that interlock with each other, and the housing base and / or the housing cover are provided with mounting positions, on which a magnet is fixedly connected.

[0016] Preferably, the stirring device further includes a filter screen, which is connected to the stirring assembly and sleeved on the rotating shaft body.

[0017] On the other hand, the present invention also provides a milk frother, including a milk frother body and the above-mentioned stirring device, wherein the stirring device is disposed at the bottom of the milk frother body and is used to stir the milk in the milk frother body.

[0018] The beneficial effects of this utility model are:

[0019] The stirring device proposed in this utility model has a support base that is fixedly connected to the bottom wall of the milk frother body, providing basic support for the rotating shaft body. The stirring component is sleeved on the rotating shaft body and can rotate around it, thereby achieving the stirring effect of milk to form milk foam.

[0020] By setting guide ramps at the connection between the support base and the main shaft, and corresponding positioning ramps that rotatably engage with the stirring assembly, the guide ramps provide a clear path constraint for the positioning ramps during stirring assembly rotation, preventing the stirring assembly from deviating from the preset rotation track and effectively preventing wobbling and offset. Furthermore, the cooperation between the guide ramps and positioning ramps increases the contact area, reducing excessive local stress and preventing component deformation and offset due to uneven stress, thus ensuring the stability of the stirring assembly during rotation. Moreover, since the guide ramps and positioning ramps are mutually matched ramp structures, they provide mutual support. When the stirring assembly is subjected to external forces such as milk resistance, the support of the ramp structure effectively resists these forces, preventing displacement of the stirring assembly. In addition, when the stirring assembly tends to offset in a certain direction, the contact of the ramps generates a corresponding reaction force, pushing it back to the correct position, thereby maintaining stable rotational motion. In summary, by coordinating the shaft assembly and the stirring assembly, the rotational stability of the stirring assembly is improved, solving the problems of unstable blade-shaking and misalignment in the prior art, and achieving efficient and stable operation of the stirring assembly. Attached Figure Description

[0021] Figure 1 This is a cross-sectional view of the stirring device provided in Embodiment 1 of this utility model;

[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a schematic diagram of the stirring device provided in Embodiment 1 of this utility model;

[0024] Figure 4 This is an exploded structural diagram of the stirring device provided in Embodiment 1 of this utility model;

[0025] Figure 5 This is a schematic diagram of the structure of the rotating shaft assembly provided in Embodiment 1 of this utility model;

[0026] Figure 6 This is a schematic diagram of the shell structure provided in Embodiment 1 of this utility model;

[0027] Figure 7 This is a cross-sectional view of the housing provided in Embodiment 1 of this utility model;

[0028] Figure 8 This is a schematic diagram of the structure of the blade and solid frame provided in Embodiment 1 of this utility model.

[0029] In the picture:

[0030] 100. Milk frother body;

[0031] 1. Rotating shaft assembly; 11. Support base; 12. Rotating shaft body; 13. Guide slope; 14. First included angle;

[0032] 2. Stirring assembly; 20. Positioning slope; 21. Shell; 210. Connecting hole; 211. Shell base; 212. Shell cover; 213. Magnet block; 22. Paddle; 23. Fixing frame; 24. Filter screen; 25. Fixing cover ring;

[0033] 3. Drive assembly; 31. Drive component; 32. Drive turntable; 33. Drive magnet;

[0034] 4. Spoiler assembly; 41. Spoiler blade; 42. Sleeve; 43. Connecting post. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] Example 1

[0040] See Figures 1 to 8 The stirring device provided in this embodiment of the utility model includes a rotating shaft assembly 1 and a stirring assembly 2. The rotating shaft assembly 1 is disposed within the milk frother body 100 and includes a support base 11 and a rotating shaft body 12. The support base 11 is fixedly connected to the bottom wall of the milk frother body 100. The rotating shaft body 12 is coaxially disposed on the support base 11, and a guide slope 13 is formed along its circumference at the connection between the support base 11 and the rotating shaft body 12. The stirring assembly 2 is sleeved on the rotating shaft body 12 and can rotate around the rotating shaft body 12. A positioning slope 20 is formed on the stirring assembly 2 corresponding to the guide slope 13. The positioning slope 20 contacts and engages with the guide slope 13 and can rotate relative to the guide slope 13.

[0041] The stirring device proposed in this utility model has a support base 11 fixedly connected to the bottom wall of the milk frother body 100, providing basic support for the rotating shaft body 12. The stirring component 2 is sleeved on the rotating shaft body 12 and can rotate around it, thereby achieving the stirring effect of milk to form milk foam.

[0042] By providing a guide slope 13 at the connection between the support base 11 and the rotating shaft body 12, and a corresponding positioning slope 20 that contacts and rotates relative to the stirring assembly 2, the guide slope 13 provides a clear movement path constraint for the positioning slope 20 when the stirring assembly 2 rotates, preventing the stirring assembly 2 from deviating from the preset rotation track, thereby effectively preventing shaking and offset. Furthermore, the cooperation between the guide slope 13 and the positioning slope 20 increases the contact area, reducing excessive local stress and preventing component deformation and offset due to uneven stress, ensuring the stability of the stirring assembly 2 during rotation. Moreover, since the guide slope 13 and the positioning slope 20 are mutually matched slope structures, they can generate mutual support. When the stirring assembly 2 is subjected to external forces such as milk resistance, the support of the slope structure can effectively resist these external forces, preventing displacement of the stirring assembly 2. In addition, when the stirring assembly 2 tends to offset in a certain direction, the contact of the slopes will generate a corresponding reaction force, pushing it back to the correct position, thereby maintaining stable rotational motion. In summary, by cooperating with the rotating shaft assembly 1 and the stirring assembly 2, the rotational stability of the stirring assembly 2 is improved, and the problems of unstable cooperation, easy shaking and deviation of the impeller 22 and the rotating shaft in the prior art are solved, thus realizing the efficient and stable operation of the stirring assembly 2.

[0043] The specific structure of the stirring device is described below.

[0044] The rotating shaft assembly 1 is used to support and guide the stirring assembly 2. See also... Figure 5The rotating shaft assembly 1 consists of a rotating shaft body 12 and a support base 11. The support base 11 is disc-shaped, with a diameter larger than that of the rotating shaft body 12. The bottom surface of the support base 11 is tightly fitted against the bottom wall of the milk frother body 100 and fixed to it. The rotating shaft body 12 is cylindrical, vertically positioned at the center of the support base 11, and coincides with the axis of the support base 11. One end of the rotating shaft body 12 is fixedly connected to the support base 11, and the other end extends upward to a suitable height within the milk frother body 100.

[0045] At the connection between the support base 11 and the rotating shaft body 12, a guide slope 13 is formed. The guide slope 13 extends in a ring shape. When the stirring assembly 2 is fitted onto the rotating shaft body 12 and begins to rotate, the guide slope 13 can provide stable guidance and support for the positioning slope 20 of the stirring assembly 2, ensuring that the stirring assembly 2 can rotate stably and smoothly around the rotating shaft body 12.

[0046] The stirring assembly 2 is fitted onto the rotating shaft body 12 and rotates around the rotating shaft body 12. Specifically, the stirring assembly 2 includes a housing 21 and a blade 22. The blade 22 is connected to the housing 21, and the housing 21 is located at the bottom of the blade 22. A connecting hole 210 is provided through the middle of the housing 21. The connecting hole 210 is fitted onto the rotating shaft body 12, and the bottom of the connecting hole 210 extends obliquely to form a positioning slope 20.

[0047] Specifically, a first angle 14 is formed between the guide slope 13 and the support base 11. This first angle 14 is obtuse, providing sufficient upward support for the stirring assembly 2 to prevent it from sinking during rotation and ensuring the stability of the stirring action. This avoids the problem of an excessively large first angle 14, which would result in insufficient support and guidance from the guide slope 13, failing to effectively limit the movement trajectory of the stirring assembly 2. Simultaneously, it avoids an excessively small first angle 14, which would cause the guide slope 13 to be too steep, resulting in excessive resistance to the stirring assembly 2 during rotation, affecting stirring efficiency and increasing energy consumption. The specific angle of the first angle 14 needs to be selected adaptably based on actual working conditions and is not limited here.

[0048] More specifically, the positioning inclined surface 20 and the guide inclined surface 13 have the same inclination angle and can fit snugly together. This identical inclination angle and close fit ensure that the contact area between the positioning inclined surface 20 and the guide inclined surface 13 is maximized during the rotation of the stirring assembly 2, thereby dispersing the force, reducing localized pressure concentration, lowering the risk of wear and damage, and extending the service life of the stirring device. Simultaneously, it effectively restricts the degrees of freedom of the stirring assembly 2, ensuring that it can only rotate stably along a preset trajectory, guaranteeing the accuracy and stability of the stirring action.

[0049] To further improve the stability of the positioning inclined surface 20 and the guide inclined surface 13, one of the guide inclined surface 13 and the positioning inclined surface 20 is provided with a groove, and the other is provided with a slider corresponding to the groove. The slider can extend into the groove and slide with the groove, which further limits the risk of deviation and shaking of the positioning inclined surface 20 and the guide inclined surface 13, and improves the accuracy and stability of the stirring action.

[0050] Furthermore, a wear-resistant coating is provided on the guide slope 13 and / or the positioning slope 20. This wear-resistant coating reduces wear on the guide slope 13 and the positioning slope 20 during relative rotation, extending the service life of the stirring device. Specifically, the wear-resistant coating can be a ceramic coating, a tungsten carbide coating, etc.

[0051] Specifically, see Figure 8 The mixing assembly 2 also includes a fixed frame 23, which is positioned above and connected to the housing 21. The fixed frame 23 is annular, and multiple blades 22 are disposed inside the fixed frame 23, arranged circumferentially along the rotating shaft body 12. The fixed frame 23 provides a more stable mounting frame for the blades 22, enhancing the overall stability of the blades 22 during rotation and further reducing potential shaking and deformation. The circumferential arrangement of multiple blades 22 along the rotating shaft body 12 increases the contact area with the milk and the mixing frequency. This allows for the mixing and frothing of more milk within the same time frame, improving the speed and quality of milk foam formation.

[0052] In this embodiment, three blades 22 are provided, and the included angle between any two adjacent blades 22 is 120 degrees. In other embodiments, four, five, or other blades 22 may also be provided. The shape and number of blades 22 are not limited here.

[0053] See Figure 1To achieve the rotation effect of the stirring component 2, the stirring device includes a drive component 3, which is located at the bottom of the milk frother body 100 and below the rotating shaft assembly 1. The drive component 3 includes a drive element 31 and a drive turntable 32. The drive element 31 drives the drive turntable 32 to rotate. A drive magnet 33 is installed inside the drive turntable 32, and a corresponding magnet block 213 is installed inside the housing 21. Through the magnetic attraction between the drive magnet 33 and the magnet block 213, the housing 21 rotates synchronously when the drive element 31 drives the drive turntable 32, thereby driving the paddle 22 to rotate. This achieves the function of the drive component 3 indirectly driving the rotation of the paddle 22. This prevents milk from entering the drive component 3 inside the milk frother body 100, thus protecting the drive component 3, extending its service life, and improving safety. Furthermore, in this embodiment, the drive component 3 does not occupy space inside the milk frother body 100, allowing the milk frother body 100 to produce more milk foam.

[0054] The driving component 31 can be a motor. Multiple driving magnets 33 and magnet blocks 213 are provided, with one-to-one correspondence between the two. The magnetic properties of the driving magnets 33 and magnet blocks 213 are opposite. The number and arrangement of them are not limited here.

[0055] The housing 21 provides some protection for the magnet 213, preventing milk from contacting it and affecting its magnetic properties. It also prevents the magnet 213 from contaminating the milk, thus improving safety.

[0056] See Figure 6 and Figure 7 The housing 21 includes a housing base 211 and a housing cover 212 that interlock with each other. The housing base 211 and / or the housing cover 212 are provided with mounting positions, and a magnet block 213 is fixedly connected to the mounting positions. The mounting positions can limit and fix the magnet block 213 to a certain extent, preventing the magnet block 213 from shaking or shifting within the housing 21, and ensuring that the magnetic attraction force of the drive magnet 33 and the magnet block 213 is sufficiently large.

[0057] Specifically, the shell 21 in this embodiment is made of food-grade stainless steel, such as 304 stainless steel or 316 stainless steel, which will not be elaborated here.

[0058] In addition, the stirring device includes a filter screen 24, which is connected to the stirring assembly 2 and fitted onto the rotating shaft body 12. The filter screen 24 is configured to filter and cut the milk foam, thereby making the coarse milk foam finer and improving its quality. The filter screen 24 can also cut air, allowing it to mix thoroughly with the milk, improving the uniformity of the air-milk mixture, and thus improving the uniformity of the milk foam.

[0059] Specifically, the filter screen 24 is set inside the fixed frame 23 and above the blade 22. In order to facilitate the fixing of the filter screen 24, a fixing cover ring 25 is also provided on the upper part of the fixed frame 23. After the filter screen 24 is placed, the fixing cover ring 25 is placed on the filter screen 24 and is engaged with the fixed frame 23.

[0060] Specifically, in this embodiment, the mesh size of the filter screen 24 can be set between 40 and 100 meshes, and the thickness of the filter screen 24 can be set between 0.08 mm and 1.2 mm.

[0061] To further optimize the quality of milk foam formation, the stirring device also includes a turbulence assembly 4, which comprises a turbulence blade 41 and a sleeve 42. The turbulence blade 41 is fixedly connected to the outer periphery of the sleeve 42, and the sleeve 42 is coaxially connected to the rotating shaft body 12 and fixed relative to the rotating shaft body 12. During the foaming process, the turbulence blade 41 effectively changes the flow direction of the milk, thereby enhancing the mixing and shearing effect of the milk and promoting the formation and refinement of milk foam. The sleeve 42 is fixed relative to the rotating shaft body 12 to ensure continuous and stable disturbance to the milk during rotation.

[0062] Specifically, the cross-section of part of the rotating shaft body 12 along its own radial direction is set as a rectangle, hexagon or triangle, etc. The turbulence component 4 also includes a connecting post 43, and a sleeve 42 is sleeved on the connecting post 43. A connecting groove is opened through the center of the connecting post 43 along its own axial direction. The shape of the connecting groove corresponds to the shape of the cross-section of the rotating shaft body 12. The connecting groove can be sleeved on the rotating shaft body 12. The connecting post 43 and the rotating shaft body 12 achieve a tight and stable connection through the specific shape of the fit. The non-circular specific shape provides sufficient anti-rotation capability to prevent the sleeve 42 from rotating relative to the rotating shaft body 12, while ensuring the ease and reliability of installation.

[0063] Example 2

[0064] This embodiment also provides a milk frother, wherein the same or corresponding parts as in Embodiment 1 are referred to by the same reference numerals as in Embodiment 1.

[0065] The milk frother includes a milk frother body 100 and a stirring device provided in Embodiment 1. The stirring device is disposed within the milk frother body 100 and is used to stir the milk within the milk frother body 100. This allows the milk frother to stir the milk more stably and evenly, thereby producing milk foam with a fine texture and rich taste, improving the quality of the milk foam. At the same time, the improved stability of the stirring device reduces noise and vibration during the operation of the milk frother, creating a quieter and more comfortable user environment.

[0066] The above embodiments merely illustrate the basic principles and characteristics of this utility model. This utility model is not limited to the above embodiments. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A stirring device, disposed within a milk frother body (100), and used to stir milk within the milk frother body (100), characterized in that, The stirring device includes: A rotating shaft assembly (1) is disposed inside the milk frother body (100). The rotating shaft assembly (1) includes a support base (11) and a rotating shaft body (12). The support base (11) is fixedly connected to the bottom wall of the milk frother body (100). The rotating shaft body (12) is coaxially disposed on the support base (11). The connection between the support base (11) and the rotating shaft body (12) forms a guide slope (13) along its circumference. A stirring assembly (2) is sleeved on the rotating shaft body (12) and can rotate around the rotating shaft body (12). A positioning inclined surface (20) is formed on the stirring assembly (2) corresponding to the guide inclined surface (13). The positioning inclined surface (20) is in contact with the guide inclined surface (13) and can rotate relative to the guide inclined surface (13).

2. The stirring device according to claim 1, characterized in that, The guide slope (13) and the support base (11) form a first included angle (14), which is an obtuse angle.

3. The stirring device according to claim 1, characterized in that, The positioning slope (20) has the same inclination angle as the guide slope (13) and can fit into the guide slope (13).

4. The stirring device according to claim 1, characterized in that, The guide slope (13) and / or the positioning slope (20) are provided with a wear-resistant coating.

5. The stirring device according to claim 1, characterized in that, The stirring device further includes a turbulence component (4), which includes a turbulence blade (41) and a sleeve (42). The turbulence blade (41) is fixedly connected to the outer periphery of the sleeve (42), and the sleeve (42) is coaxially connected to the rotating shaft body (12) and is fixed relative to the rotating shaft body (12).

6. The stirring device according to claim 1, characterized in that, The stirring assembly (2) includes a housing (21) and a blade (22). The blade (22) is connected to the housing (21). The housing (21) is located at the bottom of the blade (22). A connecting hole (210) is provided through the middle of the housing (21). The connecting hole (210) is sleeved on the rotating shaft body (12). The bottom of the connecting hole (210) extends obliquely to form the positioning slope (20).

7. The stirring device according to claim 6, characterized in that, The stirring assembly (2) further includes a fixed frame (23), which is located above and connected to the housing (21). The fixed frame (23) is annular, and the blades (22) are located inside the fixed frame (23). Multiple blades (22) are arranged at intervals along the circumference of the rotating shaft body (12).

8. The stirring device according to claim 6, characterized in that, The housing (21) includes a housing base (211) and a housing cover (212) that are interlocked. The housing base (211) and / or the housing cover (212) are provided with mounting positions, and a magnet block (213) is fixedly connected to the mounting position.

9. The stirring device according to claim 1, characterized in that, The stirring device also includes a filter screen (24), which is connected to the stirring assembly (2) and sleeved on the rotating shaft body (12).

10. A milk frother, characterized in that, The invention includes a milk frother body (100) and a stirring device according to any one of claims 1-9, wherein the stirring device is disposed at the bottom of the milk frother body (100) and is used to stir the milk in the milk frother body (100).

Images