Soybean milk machine and motor water leakage prevention structure thereof

Abstract

The invention provides a water leakage prevention structure of a motor, which comprises a machine body, a liquid stirring cavity and a motor mounting cavity which are separated in the machine body by a separation component, a rotating shaft for transmitting power extends from the motor mounting cavity to the liquid stirring cavity, and a shaft seal suitable for preventing liquid from leaking to the motor mounting cavity is arranged between the rotating shaft and the separation component. The shaft seal is provided with a sealing lip in sealing fit with the rotating shaft; the rotating shaft is provided with a water retaining ring arranged in the liquid stirring cavity, and the water retaining ring rotates along with the rotating shaft; the water retaining ring is provided with a water retaining part circumferentially surrounding the outer side of the sealing lip, and a gap between the water retaining part and the sealing lip is smaller than a specified distance, so that when the water retaining ring rotates at a set speed, centrifugal force generated by the water retaining part can prevent liquid from penetrating through the sealing lip and leaking towards the motor mounting cavity. The invention further provides a soybean milk machine using the motor water leakage prevention structure.

Description

Technical Field

[0001] The invention relates to the field of beverage manufacturing equipment, and in particular to a soybean milk machine and a water leakage prevention structure of a motor thereof. Background Art

[0002] Beverage making equipment is widely used in the food service industry. For example, a soymilk maker uses a stirring blade to create a water flow that thoroughly mixes water and soy milk powder in a mixing drum to complete the soymilk production process. During the soymilk maker's production and installation, ensuring the concentricity of the motor shaft and the shaft seal is difficult, resulting in a gap between the motor shaft and the shaft seal. Consequently, during the soymilk production process, the stirring blades create a vortex in the mixing drum, which can throw water into the gap between the motor shaft and the shaft seal, causing leakage. The existing technologies often have problems such as side effects caused by blocking gaps and insufficient water leakage prevention. For example, increasing the interference fit of the shaft seal or increasing the hardness of the shaft seal silicone can ensure that there is no gap between the motor shaft and the shaft seal after installation. However, this will increase the friction between the shaft seal and the motor shaft, resulting in noise during motor operation and shortening the life of the shaft seal. Moreover, after long-term operation of the motor, the shaft seal will wear out, and a gap will still appear between the motor shaft and the shaft seal. For example, in application number CN201220512904.9, a water-splitting blade is added in front of the motor to block the water flow brought back by the vortex. However, the gap between the motor shaft and the shaft seal still exists, and the water-splitting blade cannot ensure that all water flow is blocked during the pulping process. In addition, the shaft seals in the existing technologies are all exposed in the mixing barrel, and the operating speed of the soymilk machine is generally high. The high-speed water flow generated by the stirring blade directly impacts the shaft seal, which can easily cause the shaft seal to be damaged. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art and provide a soymilk maker and a water-leakage-proof structure of its motor.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows: A motor water leakage prevention structure for a soymilk maker comprises a body, a liquid stirring chamber and a motor mounting chamber formed by dividing the body by a partition member, a motor being arranged in the motor mounting chamber, a rotating shaft for transmitting power extending from the motor mounting chamber to the liquid stirring chamber, a shaft seal suitable for preventing liquid from leaking into the motor mounting chamber is arranged between the rotating shaft and the partition member, the shaft seal having a sealing lip that cooperates with the rotating shaft seal; the rotating shaft has a water retaining ring arranged in the liquid stirring chamber, the water retaining ring rotates with the rotating shaft; wherein the water retaining ring has a water retaining portion circumferentially surrounding the outside of the sealing lip, and the gap between the water retaining portion and the sealing lip is less than a specified distance, so that when the water retaining ring rotates at a set speed, the centrifugal force generated by its water retaining portion can prevent liquid from penetrating the sealing lip and leaking toward the motor mounting chamber.

[0005] Furthermore, the gap between the water retaining portion and the sealing lip is less than 1.0 mm.

[0006] Furthermore, the water retaining portion abuts against the sealing lip.

[0007] Furthermore, the set speed is not less than 4000 revolutions per minute.

[0008] Furthermore, the outer side of the water retaining ring has an inclined water guiding surface, and the water guiding surface is suitable for guiding liquid away from the sealing lip.

[0009] Furthermore, the water guide surface includes a first section surface and a second section surface, and in the extending direction of the water guide surface, the first section surface is located upstream of the second section surface.

[0010] Furthermore, the first section surface and the second section surface are both truncated cone side surfaces.

[0011] Furthermore, the diameter of the end section circle of the first section surface is larger than the diameter of the initial section circle of the second section surface.

[0012] Furthermore, a fitting hole is provided on the inner side of the water retaining ring, and the fitting hole forms an interference fit with the rotating shaft.

[0013] Furthermore, the rotating shaft is coaxially arranged with the output shaft of the motor and is fixedly connected to the output shaft of the motor.

[0014] Furthermore, the rotating shaft also has a waterproof ring arranged in the motor installation cavity, and the waterproof ring is suitable for preventing liquid from flowing along the rotating shaft to the motor.

[0015] Furthermore, the waterproof ring has the same shape as the water retaining ring.

[0016] A soybean milk maker comprises the above-mentioned motor water leakage prevention structure.

[0017] Due to the adoption of the above technical solution, the present invention has the following beneficial effects: 1. When the water retaining ring rotates, the water retaining part generates centrifugal force acting on the liquid, preventing the liquid from penetrating the sealing lip and penetrating into the motor installation cavity, thereby preventing water leakage between the rotating shaft and the shaft seal.

[0018] 2. The water retaining ring can wrap the gap between the rotating shaft and the shaft seal, forming double protection with the shaft seal, enhancing the waterproof effect, and at the same time preventing water flow from directly impacting the sealing lip, reducing the possibility of shaft seal failure.

[0019] 3. The water-guiding surface of the water retaining ring can guide the water flow in the liquid stirring chamber away from the sealing lip, reducing the risk of water leakage.

[0020] 4. The water retaining ring can block the debris generated by the friction between the shaft seal and the rotating shaft, while the water retaining ring itself does not rub against the rotating shaft and does not produce debris, thus ensuring food safety.

[0021] 5. The waterproof ring can ensure that in the event of accidental water leakage, water will not enter the motor body and cause motor leakage or damage.

[0022] 6. There is no need to increase the interference between the shaft seal and the rotating shaft, which ensures the life of the shaft seal and there is no obvious noise when the motor is running. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0024] Figure 1 This is a three-dimensional diagram of the motor's anti-leakage structure; Figure 2 This is an exploded view of the motor's anti-leakage structure; Figure 3 This is a cross-sectional view of the motor's anti-leakage structure; Figure 4 It is a three-dimensional diagram of the shaft seal; Figure 5 It is a cross-sectional view of the shaft seal; Figure 6 It is a three-dimensional diagram of the water retaining ring; Figure 7 It is a cross-sectional view of the water retaining ring. DETAILED DESCRIPTION

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more apparent, the present invention will be further described in detail below with reference to the accompanying drawings. The components of the embodiments of the present invention generally described and illustrated in the accompanying drawings can be arranged and designed in a variety of different configurations. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0027] Unless otherwise defined, technical or scientific terms used in this patent document shall have the ordinary meanings understood by persons of ordinary skill in the art to which this invention belongs. The terms "first," "second," and similar expressions used in the specification and claims of this invention do not denote any order, quantity, or importance, but are merely used to distinguish one component from another. Similarly, terms such as "a," "an," or "the" do not denote a limitation of quantity, but rather denote the presence of at least one. Terms such as "include" or "comprising" mean that the elements or objects preceding the phrase "include" or "comprising" include the elements or objects listed after the phrase and their equivalents, and do not exclude other elements or objects. Terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are used solely to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. These terms are used solely to facilitate the description of the invention and to simplify the description. They are not intended to indicate or imply that the device or component referred to must have, be constructed, or operate in a specific orientation, and are not to be construed as limitations on the invention.

[0028] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0029] The following describes some embodiments of the present invention in detail with reference to the accompanying drawings. In the absence of conflict, the features of the following embodiments can be combined with each other.

[0030] refer to Figure 1-5The motor water-leakage prevention structure provided by the present invention is used in a soymilk maker. The motor water-leakage prevention structure includes a body A, a liquid stirring chamber B, and a motor mounting chamber C. Specifically, the body A includes a stirring barrel 2, a partition member 6, and a frame 7. The frame 7 has a motor mounting plate 71. The partition member 6 is mounted on the motor mounting plate 71 and has a mounting seat 61. The stirring barrel 2 is mounted on the mounting seat 61 and is located to the left of the partition member 6. The space inside the stirring barrel 2 forms the liquid stirring chamber B. The space to the right of the partition member 6 and inside the frame 7 forms the motor mounting chamber C. The motor 8 is disposed in the motor mounting chamber C. The rotating shaft 81 extends from the motor mounting chamber C to the liquid stirring chamber B. The power of the motor is transmitted to the stirring blade 3 via the rotating shaft 81. A shaft seal 5 is disposed between the rotating shaft 81 and the partition member 6 to prevent liquid from leaking into the motor mounting chamber C. The shaft seal 5 is fixedly mounted on the inner side of the mounting seat 61 via an annular groove 51. The shaft seal 5 remains stationary when the rotating shaft 81 rotates. The shaft seal 5 has a trumpet-shaped sealing lip 52, which seals against the rotating shaft 81. Preferably, the sealing lip 52 and the rotating shaft 81 are fitted with an interference fit to achieve a leak-proof seal. The shaft seal 5 should be made of an elastic and wear-resistant material, such as rubber or silicone.

[0031] refer to Figure 1-7 The rotating shaft 81 has a water retaining ring 4 arranged on one side of the liquid stirring chamber B. The water retaining ring 4 is installed in a position close to the shaft seal 5 and rotates with the rotating shaft 81. The water retaining ring 4 has an annular water retaining portion 41, which circumferentially surrounds the outside of the sealing lip 52. When the water retaining ring 4 rotates at a set speed, the centrifugal force generated by the water retaining portion 41 acts on the liquid, causing the liquid to stay away from the sealing lip 52, thereby preventing the liquid from penetrating the sealing lip 52 and leaking toward the motor mounting chamber C. Specifically, the set speed is not less than 4000 revolutions per minute to ensure that the water retaining portion 41 can generate sufficient centrifugal force when the water retaining ring 4 rotates. Preferably, the water retaining portion 41 has a trumpet-shaped structure that matches the sealing lip 52, so that the water retaining ring 4 does not interfere with the sealing lip 52 after installation; the water retaining ring 4 should be made of hard material so that the water retaining ring 4 can maintain a firm connection with the rotating shaft 81 and does not produce relative sliding during rotation, thereby ensuring the stability and reliability of the waterproof performance.

[0032] refer to Figure 1-7 The gap between the water retaining portion 41 and the sealing lip 52 should be less than a specified distance so that the centrifugal force generated by the rotation of the water retaining portion 41 can act on the liquid outside the sealing lip 52 to ensure the anti-leakage effect. Preferably, the gap is set to less than 1.0 mm. The water retaining portion 41 can also abut against the sealing lip 52, that is, there is no gap between the water retaining portion 41 and the sealing lip 52, forming a double protection with the seal between the sealing lip 52 and the rotating shaft 81, further strengthening the anti-leakage effect. In this embodiment, the water retaining portion 41 abuts against the sealing lip 52.

[0033] refer to Figure 1-7The outer side of the water retaining ring 4 has an inclined water guide surface 42. Specifically, the stirring blade 3 is mounted at the end of the rotating shaft 81 and is located on the left side of the liquid stirring chamber B. When the motor 8 is running, the stirring blade 3 forms a vortex in the liquid stirring chamber B, which causes the liquid to flow toward the sealing lip 52. The water guide surface 42 includes a first section 421 and a second section 422. The first section 421 is close to the stirring blade 3 and the second section 422 is close to the sealing lip 52. The water guide surface 42 extends from the stirring blade 3 to the sealing lip 52, that is, the first section 421 is located upstream of the second section 422. Both the first section 421 and the second section 422 are truncated cone-shaped surfaces. The diameters of their cross-sections gradually increase along their extension direction. This allows the slope 42 to guide the liquid away from the sealing lip 52 as it flows toward the sealing lip 52. Furthermore, the diameter of the cross-section at the end of the first section 421 is larger than the diameter of the cross-section at the beginning of the second section 422, giving the water-guiding surface 42 a stepped structure and enhancing its water-guiding effect. It should be understood that the water-guiding surface 42 can also be configured in other suitable shapes, as long as they effectively guide the liquid away from the sealing lip 52.

[0034] refer to Figure 1 、 Figure 3 and Figure 6 The inner side of the water retaining ring 4 has a matching hole 43 for assembling with the rotating shaft 81. Specifically, the matching hole 43 forms an interference fit with the rotating shaft 81 to achieve the effect of sealing and preventing water leakage, while ensuring that the water retaining ring 4 is reliably fixed on the rotating shaft 81.

[0035] refer to Figure 1-3 In this embodiment, the motor 8 is mounted on the motor mounting plate 71, and the rotating shaft 81 is coaxially arranged with the output shaft of the motor 8 and fixedly connected to the output shaft of the motor 8. The output shaft of the motor 8 can also be connected to the rotating shaft 81 through other transmission methods, such as gear transmission or belt transmission, so that the motor 8 has a flexible installation position and the rotating shaft 81 can meet the speed requirements of different models of soymilk makers.

[0036] refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 6, the rotating shaft 81 also has a waterproof ring 40 arranged in the motor mounting cavity C. In this embodiment, a through hole 72 is provided on the motor mounting plate 71, and the rotating shaft 81 passes through the through hole 72. After installation, the waterproof ring 40 rests on the motor mounting plate 71 and covers the through hole 72, and the waterproof ring 40 and the motor 8 are on both sides of the motor mounting plate 71. As a safety measure, in the event of accidental water leakage, the waterproof ring 40 can prevent liquid from entering the motor 8 along the rotating shaft 81, thereby protecting the motor 8 from leakage or damage, avoiding possible accidents and losses. Preferably, the waterproof ring 40 has the same shape as the water retaining ring 4, ensuring the waterproof effect; the waterproof ring 40 and the water retaining ring 4 can also have the same material and size, so that the waterproof ring 40 and the water retaining ring 4 can be regarded as the same part, which is convenient for production and installation.

[0037] refer to Figure 1-3 The present invention provides a soymilk maker including the aforementioned motor water-leakage prevention structure. To achieve the soymilk making process, the soymilk maker further includes a hopper 1 for feeding materials and a water inlet 21 for taking in water. The hopper 1 is mounted above the mixing barrel 2, and the water inlet 21 is located at the left end of the bottom of the mixing barrel 2.

[0038] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A motor water leakage prevention structure for a soymilk maker, comprising a body, a liquid stirring chamber and a motor mounting chamber separated by a partition member within the body, a motor disposed within the motor mounting chamber, a rotating shaft for transmitting power extending from the motor mounting chamber to the liquid stirring chamber, a shaft seal disposed between the rotating shaft and the partition member for preventing liquid from leaking into the motor mounting chamber, the shaft seal having a sealing lip that seals with the rotating shaft; Its characteristics are: The rotating shaft has a water retaining ring arranged in the liquid stirring chamber, and the water retaining ring rotates with the rotating shaft; wherein, the water retaining ring has a water retaining portion circumferentially surrounding the outside of the sealing lip, and the gap between the water retaining portion and the sealing lip is less than a specified distance, so that when the water retaining ring rotates at a set speed, the centrifugal force generated by its water retaining portion can prevent the liquid from penetrating the sealing lip and leaking toward the motor mounting cavity.

2. The motor water leakage prevention structure according to claim 1, characterized in that: The gap between the water retaining portion and the sealing lip is less than 1.0 mm.

3. The motor water leakage prevention structure according to claim 1 or 2, characterized in that: The water stop portion abuts against the sealing lip.

4. The motor water leakage prevention structure according to claim 1, characterized in that: The set speed is not less than 4000 revolutions per minute.

5. The motor water leakage prevention structure according to claim 1, characterized in that: The outer side of the water retaining ring is provided with an inclined water guiding surface, and the water guiding surface is suitable for guiding liquid away from the sealing lip.

6. The motor water leakage prevention structure according to claim 5, characterized in that: The water guide surface includes a first section surface and a second section surface. In the extending direction of the water guide surface, the first section surface is located upstream of the second section surface.

7. The motor water leakage prevention structure according to claim 6, characterized in that: The first section surface and the second section surface are both truncated cone side surfaces.

8. The motor water leakage prevention structure according to claim 7, characterized in that: The diameter of the cut-off circle at the end of the first segment is larger than the diameter of the cut-off circle at the initial end of the second segment.

9. The motor water leakage prevention structure according to claim 1, characterized in that: The inner side of the water retaining ring has a matching hole, and the matching hole forms an interference fit with the rotating shaft; preferably, the rotating shaft is coaxially arranged with the output shaft of the motor and fixedly connected to the output shaft of the motor; preferably, the rotating shaft also has a waterproof ring arranged in the motor mounting cavity, and the waterproof ring is suitable for preventing liquid from flowing along the rotating shaft to the motor; preferably, the waterproof ring has the same shape as the water retaining ring.

10. A soymilk maker, characterized in that: The motor water leakage prevention structure comprises any one of claims 1-10.

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