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 catering service industry. For example, a soymilk machine uses the water flow formed by the stirring blades to fully mix water and soymilk powder in the stirring barrel to complete the pulping process. During the production and installation of the soymilk machine, it is difficult to ensure the concentricity of the motor shaft and the shaft seal, and a gap will be generated between the motor shaft and the shaft seal. Therefore, during the pulping process, the stirring blades form a vortex in the stirring barrel when stirring, causing water to be thrown into the gap between the motor shaft and the shaft seal, resulting in water leakage. The existing technologies often have problems such as side effects of blocking gaps and insufficient water leakage prevention effects. For example, increasing the interference fit of the shaft seal or improving 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, it will increase the friction between the shaft seal and the motor shaft, resulting in noise when the motor is running and shortening the life of the shaft seal. After the motor runs for a long time, the shaft seal will wear out, and a gap will still appear between the motor shaft and the shaft seal. Another example is the method in application number CN201220512904.9, which blocks the water flow brought back by the vortex by adding a water-throwing sheet in front of the motor. However, the gap between the motor shaft and the shaft seal still exists, and the water-throwing sheet cannot ensure that all water flows in the pulping process are blocked. In addition, the shaft seals in the existing technologies are all exposed in the mixing barrel, and the working speed of the soybean milk machine is generally high. The high-speed water flow generated by the stirring blades 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 machine and a water leakage prevention structure of its motor.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0005] A motor water leakage prevention structure for a soybean milk machine comprises a machine body, a liquid stirring chamber and a motor installation chamber which are separated by a partition member in the machine body, a motor is arranged in the motor installation chamber, a rotating shaft for transmitting power extends from the motor installation chamber to the liquid stirring chamber, a shaft seal suitable for preventing liquid from leaking into the motor installation chamber is arranged between the rotating shaft and the partition member, the shaft seal has a sealing lip which 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 outer side 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 installation chamber.

[0006] Furthermore, the gap between the water retaining part and the sealing lip is less than 1.0 mm.

[0007] Furthermore, the water retaining part abuts against the sealing lip.

[0008] Furthermore, the set speed is not less than 4000 revolutions per minute.

[0009] Furthermore, the outer side of the water retaining ring has a water guiding surface which is inclined, and the water guiding surface is adapted to guide the liquid away from the sealing lip.

[0010] Furthermore, the water guiding surface includes a first section surface and a second section surface, and in the extending direction of the water guiding surface, the first section surface is located upstream of the second section surface.

[0011] Furthermore, both the first section surface and the second section surface are the side surfaces of a truncated cone.

[0012] Furthermore, the diameter of the end cut circle of the first section surface is larger than the diameter of the initial cut circle of the second section surface.

[0013] Furthermore, the inner side of the water retaining ring has a fitting hole, and the fitting hole forms an interference fit with the rotating shaft.

[0014] 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.

[0015] Furthermore, the rotating shaft also has a waterproof ring disposed in the motor installation cavity, and the waterproof ring is adapted to prevent the liquid from flowing along the rotating shaft towards the motor.

[0016] Furthermore, the waterproof ring has the same outer shape as the water retaining ring.

[0017] A soymilk machine includes the above-mentioned motor anti-leakage structure.

[0018] Due to the adoption of the above technical solutions, the present invention has the following beneficial effects:

[0019] 1. When the water retaining ring rotates, the water retaining part generates a centrifugal force acting on the liquid, preventing the liquid from penetrating through the sealing lip and seeping into the motor installation cavity, thereby preventing water leakage between the rotating shaft and the shaft seal.

[0020] 2. The water retaining ring can wrap the gap between the rotating shaft and the shaft seal, forming a double protection with the shaft seal, strengthening the waterproof effect, and at the same time avoiding the water flow directly impacting the sealing lip, reducing the possibility of shaft seal failure.

[0021] 3. The water guiding surface of the water retaining ring can guide the water flow in the liquid stirring cavity away from the sealing lip, reducing the risk of water leakage.

[0022] 4. The water baffle can block the debris generated by the friction between the shaft seal and the rotating shaft inside, and the water baffle itself does not rub against the rotating shaft and does not generate debris, ensuring food safety.

[0023] 5. The waterproof ring can ensure that when there is accidental water leakage, water will not enter the motor body, causing electric leakage or damage to the motor.

[0024] 6. There is no need to increase the interference between the shaft seal and the rotating shaft, ensuring the service life of the shaft seal and no obvious noise during motor operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] 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 described below only relate to some embodiments of the present invention and do not limit the present invention.

[0026] Figure 1 is a perspective view of the motor water leakage prevention structure;

[0027] Figure 2 is an exploded view of the motor water leakage prevention structure;

[0028] Figure 3 is a cross-sectional view of the motor water leakage prevention structure;

[0029] Figure 4 is a perspective view of the shaft seal;

[0030] Figure 5 is a cross-sectional view of the shaft seal;

[0031] Figure 6 is a perspective view of the water baffle;

[0032] Figure 7 is a cross-sectional view of the water baffle. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the present invention will be further described in detail below with reference to the drawings. Generally, the components of the embodiments of the present invention described and illustrated in the drawings here can be arranged and designed in various different configurations. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0034] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] Unless otherwise defined, the technical terms or scientific terms used in this patent document shall have the ordinary meanings as understood by those of ordinary skill in the art to which this invention pertains. The terms "first", "second" and similar words used in the description of the present invention's patent specification and claims do not denote any order, quantity or importance, but are merely used to distinguish different components. Similarly, words such as "a", "an" or "the" do not denote a quantity limitation, but rather indicate the presence of at least one. Words such as "comprising" or "including" mean that the elements or objects appearing before "comprising" or "including" cover the elements or objects listed after "comprising" or "including" and their equivalents, and do not exclude other elements or objects. Terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly. They are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation on the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The following will, with reference to the accompanying drawings, elaborate on some embodiments of the present invention. Without conflict, the features in the following embodiments may be combined with each other.

[0038] Reference Figure 1-5, the motor anti-leakage structure provided by the present invention is used for a soymilk machine. The motor anti-leakage structure includes a body A, a liquid stirring chamber B, and a motor installation chamber C. Specifically, the body A includes a stirring barrel 2, a separating member 6, and a frame 7. The frame 7 has a motor mounting plate 71. The separating member 6 is installed on the motor mounting plate 71 and has a mounting seat 61. The stirring barrel 2 is installed on the mounting seat 61 and is located on the left side of the separating member 6. The space inside the stirring barrel 2 forms the liquid stirring chamber B. The space on the right side of the separating member 6 and inside the frame 7 forms the motor installation chamber C. A motor 8 is arranged in the motor installation chamber C, and a rotating shaft 81 extends from the motor installation chamber C to the liquid stirring chamber B. The power of the motor is transmitted to the stirring blade 3 through the rotating shaft 81. A shaft seal 5 adapted to prevent liquid from leaking into the motor installation chamber C is arranged between the rotating shaft 81 and the separating member 6. The shaft seal 5 is fixedly installed inside the mounting seat 61 through an annular groove 51 and remains stationary when the rotating shaft 81 rotates. The shaft seal 5 has a sealing lip 52 in a horn shape, and the sealing lip 52 is in sealing cooperation with the rotating shaft 81. Preferably, the fit between the sealing lip 52 and the rotating shaft 81 is an interference fit to achieve the effect of sealing and preventing water leakage. The shaft seal 5 should be made of an elastic and wear-resistant material, such as rubber or silicone.

[0039] Reference Figure 1-7 , the rotating shaft 81 has a water retaining ring 4 arranged on the side of the liquid stirring chamber B. The water retaining ring 4 is installed near 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 move away from the sealing lip 52, thereby preventing the liquid from penetrating through the sealing lip 52 and leaking into the motor installation 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 horn-shaped structure adapted to 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 a hard material, so that the water retaining ring 4 can be firmly connected to the rotating shaft 81 and does not generate relative sliding during rotation, thereby ensuring the stability and reliability of the waterproof performance.

[0040] Reference 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 be 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.

[0041] Reference Figure 1-7, the outer side of the water retaining ring 4 has an inclined water guiding surface 42. Specifically, the stirring blade 3 is installed 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 operates, the stirring blade 3 forms a vortex in the liquid stirring chamber B, and the vortex causes the liquid to flow towards the sealing lip 52; the water guiding surface 42 includes a first section surface 421 and a second section surface 422. The first section surface 421 is close to the stirring blade 3 while the second section surface 422 is close to the sealing lip 52. The extending direction of the water guiding surface 42 is from the stirring blade 3 to the sealing lip 52, that is, the first section surface 421 is located upstream of the second section surface 422. Both the first section surface 421 and the second section surface 422 are the side surfaces of a frustum of a cone, and along the extending direction, the diameters of the truncated circles of the first section surface 421 and the second section surface 422 gradually increase. In this way, when the liquid flows towards the sealing lip 52, the slope 42 guides the liquid away from the sealing lip 52; in addition, the diameter of the truncated circle at the end of the first section surface 421 is larger than the diameter of the truncated circle at the beginning of the second section surface 422, so that the water guiding surface 42 has a stepped structure and the effect of guiding the water flow is better. It should be understood that the water guiding surface 42 can also be set to other suitable shapes as long as it can make the liquid away from the sealing lip 52.

[0042] Reference Figure 1 、 Figure 3 and Figure 6 , the inner side of the water retaining ring 4 has a fitting hole 43 for fitting with the rotating shaft 81. Specifically, the fitting hole 43 and the rotating shaft 81 form an interference fit to achieve the effect of sealing and preventing water leakage, and at the same time ensure that the water retaining ring 4 is reliably fixed on the rotating shaft 81.

[0043] Reference Figure 1-3 , in this embodiment, the motor 8 is installed on the motor mounting plate 71. The rotating shaft 81 is coaxially arranged with the output shaft of the motor 8 and is 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 at the same time the rotating shaft 81 can meet the speed requirements of different models of soybean milk machines.

[0044] Reference Figure 1 、 Figure 2 、 Figure 3 and Figure 6, the rotating shaft 81 further has a waterproof ring 40 disposed within the motor mounting cavity C. In this embodiment, a through hole 72 is provided on the motor mounting plate 71, the rotating shaft 81 passes through the through hole 72, and after the waterproof ring 40 is installed, it abuts against 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 an insurance 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 electric leakage or damage and avoiding possible accidents and losses. Preferably, the waterproof ring 40 has the same outer shape as the water retaining ring 4, ensuring the waterproof effect; the waterproof ring 40 and the water retaining ring 4 may also have the same material and dimensions, so that the waterproof ring 40 and the water retaining ring 4 can be regarded as the same part, facilitating production and installation.

[0045] Reference Figure 1-3 , the present invention provides a soymilk machine including the above-mentioned motor water leakage prevention structure. To implement the pulping process, the soymilk machine further includes a hopper 1 for feeding and a water inlet 21 for water intake. The hopper 1 is installed above the stirring barrel 2, and the water inlet 21 is provided at the left end of the bottom of the stirring barrel 2.

[0046] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A motor water-proof structure for a soymilk machine, comprising a machine body, a liquid stirring chamber and a motor installation chamber separated by a partition member in the machine body, a motor is arranged in the motor installation chamber, a rotating shaft for transmitting power extends from the motor installation chamber to the liquid stirring chamber, a shaft seal is arranged between the rotating shaft and the partition member and is suitable for preventing liquid from leaking into the motor installation chamber, and the shaft seal has a sealing lip that cooperates with the rotating shaft seal; Features: 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 the water retaining portion can prevent the liquid from penetrating the sealing lip and leaking toward the motor mounting chamber.

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 the 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 surface is larger than the diameter of the cut-off circle at the beginning of the second segment surface.

9. The motor water leakage prevention structure according to claim 1, characterized in that: The inner side of the water retaining ring is provided with a matching hole, and the matching hole forms an interference fit with the rotating shaft.

10. The motor water leakage prevention structure according to claim 1, characterized in that: The rotating shaft is coaxially arranged with the output shaft of the motor and is fixedly connected to the output shaft of the motor.

11. The motor water leakage prevention structure according to claim 1, characterized in that: 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.

12. The motor water leakage prevention structure according to claim 11, characterized in that: The waterproof ring has the same shape as the water retaining ring.

13. A soymilk machine, characterized in that: The invention comprises the motor water leakage prevention structure as described in any one of claims 1-12.

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