Sealing structure of soybean milk machine power device

Abstract

The utility model discloses a sealing structure of a soybean milk machine power device, which comprises a machine base and a power device arranged in the machine base, the machine base comprises an upper machine base used for forming the bottom of a containing cavity of a soybean milk machine, the power device comprises a motor shaft, the upper end of the motor shaft extends out of the upper machine base, and a sealing assembly is arranged between the shaft side of the motor shaft and the upper machine base; the sealing assembly comprises a sealing ring, the sealing ring comprises an annular part and a horn part arranged below the annular part, the diameter of the horn part is gradually increased from top to bottom, and a sealing step face is formed between the outer side of the horn part and the outer side of the annular part. The diameter of the outer side wall of the horn part is gradually increased from top to bottom, compared with single lip contact of a traditional oil seal, the structure can drive the horn part to expand outwards through fluid pressure in a high-temperature flowing environment, the fitting degree of the sealing face is dynamically enhanced, and the sealing performance is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to domestic appliance technical field especially relates to a sealing structure of soybean milk machine power device. BACKGROUND

[0002] As a small household appliance device commonly used in modern kitchen, the sealing performance of the core function component power device of the soybean milk machine directly affects the service life and safety of the device. The power device of the soybean milk machine commonly seen in the market usually adopts an oil seal structure to seal the connection between the motor shaft and the rotating blade. Specifically, the structure sets an annular oil seal between the outer wall of the motor shaft and the blade mounting seat, and uses the interference fit between the oil seal lip and the shaft surface to achieve the sealing effect.

[0003] However, the prior art has the following significant defects: first, the machining precision of the oil seal on the shaft surface is relatively high, and under the conditions of long-term high-speed rotation and temperature alternation, the lip is prone to wear and tear, leading to sealing failure; second, the high-temperature steam and liquid generated in the cavity during the operation of the soybean milk machine can easily penetrate into the surface of the motor shaft through the gap of the oil seal, and long-term accumulation can cause rusting of the metal shaft body, further aggravating the wear and tear of the sealing structure, forming a vicious cycle. Therefore, there is an urgent need for a new sealing structure that can effectively block the contact path of the liquid and the motor shaft to improve the long-term operation stability of the power device of the soybean milk machine. SUMMARY

[0004] In view of this, the purpose of the utility model is to provide a sealing structure of a soybean milk machine power device, which has good sealing performance and is easy to install.

[0005] The technical scheme adopted by the utility model to solve the technical problem is:

[0006] A sealing structure of a soybean milk machine power device, comprising a base and a power device arranged in the base, the base comprising an upper base for forming the bottom of the cavity of the soybean milk machine, the power device comprising a motor shaft extending out of the upper base, and a sealing assembly arranged between the shaft side of the motor shaft and the upper base.

[0007] The sealing assembly comprises a sealing ring, the sealing ring comprising an annular portion and a horn portion arranged below the annular portion, the diameter of the horn portion gradually increasing from top to bottom, and a sealing step surface being formed between the outer side of the horn portion and the outer side of the annular portion.

[0008] The horn portion comprises an outer side wall and an inner side wall, both the outer side wall and the inner side wall being inclined surfaces inclined outward from top to bottom.

[0009] The motor shaft is provided with a blade assembly above the sealing ring, and a cap-shaped nut is arranged at the upper end of the motor shaft, the cap-shaped nut being screwed on the blade assembly and the sealing ring through thread connection.

[0010] The sealing assembly further comprises a mounting sleeve arranged between the motor shaft and the upper base, and an abutting ring is arranged on the mounting sleeve, the abutting ring has an L-shaped cross section, and one end of the abutting ring is abutted against the sealing step surface, and the other end is arranged between the mounting sleeve and the upper base.

[0011] The machine shell is arranged outside the base, the inside of the machine shell and the upper surface of the upper base form a container cavity of the soybean milk machine, and the power device is arranged below the upper base; a sealing ring assembly is arranged on the edge of the upper base and the inner wall of the machine shell, and the sealing ring assembly comprises at least one sealing ring arranged between the edge of the upper base and the inner wall of the machine shell.

[0012] An annular groove is arranged between the edge of the upper base and the machine shell, a fixing member with a T-shaped cross section is arranged in the annular groove, the fixing member divides the annular groove into an upper part and a lower part, and the sealing ring comprises two sealing rings arranged on one side of the fixing member in the upper direction and the lower direction respectively.

[0013] The base comprises a bottom base arranged below the upper base, at least two first mounting columns are arranged on the bottom base, second mounting columns capable of being mounted in cooperation with the first mounting columns are arranged on the upper base, and a mounting bracket is arranged on the power device, the mounting bracket is fixedly arranged between the first mounting columns and the second mounting columns, so that the power device is arranged in a suspended manner with the bottom surface of the bottom base.

[0014] Damping pads are arranged on the upper and lower sides of the mounting bracket.

[0015] A heat dissipation fan is arranged at the lower end of the power device, and the heat dissipation fan is also arranged in a suspended manner with the bottom surface of the bottom base.

[0016] The sealing ring and the sealing ring are made of high-temperature-resistant rubber material.

[0017] The utility model discloses the beneficial effect is:

[0018] 1、The motor shaft and the sealing assembly in the cavity of the soybean milk machine are a trumpet-shaped sealing ring structure. The sealing step surface below the annular part of the sealing ring abuts on the abutting ring, and its position is fixed. The outer side wall of the trumpet part gradually expands from top to bottom, so that the outer side of the sealing ring and the upper machine seat form a multi-stage pressure self-compensation sealing interface. Compared with the single lip contact of the traditional oil seal, the structure can drive the trumpet part to expand outward under the action of fluid pressure in a high-temperature flowing environment, dynamically enhance the sealing surface fitting degree, and block the path of liquid penetrating into the motor shaft along the axial direction, thereby fundamentally avoiding the rusting of the metal shaft body. The design of the gradually expanding inner side wall of the trumpet part from top to bottom facilitates the installation of the sealing ring, and the double-bevel design of the inner and outer side walls of the trumpet part further optimizes the pressure conduction path, so that the sealing ring generates radial deformation when subjected to axial stress, forming an active sealing effect of "the greater the pressure, the tighter the sealing", and solving the problem of sealing performance degradation caused by wear of the traditional oil seal.

[0019] 2、The cap nut compression structure realizes the axial pre-tightening of the blade assembly, the sealing ring and the motor shaft through screwing, ensures that the sealing ring and the shaft side contact surface are uniformly stressed, eliminates local stress concentration caused by assembly deflection, and makes the sealing interface still maintain stable fitting under high-speed rotating conditions.

[0020] 3、The sealing ring between the machine seat edge and the inner wall of the machine shell forms the static sealing of the cavity and the power device, and the layered arrangement of the sealing ring further increases the sealing effect and also has a certain damping effect.

[0021] 4、The power device is mainly suspendedly installed through the first mounting column of the base and the second mounting column of the upper machine seat clamping the mounting brackets on both sides, and reduces the vibration transmission of the power device through the damping gasket, so as to avoid that the sealing structures such as the sealing assembly and the sealing ring assembly generate micro-gaps due to high-frequency mechanical impact; at the same time, the suspended layout of the bottom cooling fan enhances the heat dissipation efficiency of the motor, reduces the risk of softening of the sealing ring due to high temperature, and indirectly improves the sealing durability. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a cross-sectional structure schematic diagram of the soybean milk machine;

[0023] Figure 2 is a cross-sectional structure schematic diagram of the machine seat;

[0024] Figure 3 is Figure 2 A local enlarged view in

[0025] Figure 4 is an exploded schematic diagram of the machine seat. DETAILED DESCRIPTION

[0026] To make the technical problems solved by the utility model, the technical scheme adopted and the technical effects reached more clear, the technical scheme of the utility model is further illustrated below in combination with the drawings and through specific embodiments.It can be understood that the specific embodiments described herein are merely used to explain the utility model and not limit the utility model.In addition, it needs to be explained that only the parts related to the utility model are shown in the drawings for the convenience of description but not all.

[0027] With reference to Figure 1 , Figure 2 The utility model proposes a kind of sealing structure of soybean milk machine power device, including base 1 and the power device 3 being arranged in base 1, base 1 includes the upper base 11 for forming the bottom of the cavity of soybean milk machine, the motor shaft 30 of power device 3 includes the upper end protruding the upper base 11, and sealing assembly 4 is arranged between the shaft side of motor shaft 30 and the upper base 11;

[0028] With reference to Figure 3 Sealing assembly 4 includes sealing ring 40, sealing ring 40 includes annular part 400 and the horn part 401 being arranged in annular part 400 below, the diameter of horn part 401 gradually increases from top to bottom, and sealing step surface 402 is formed between the outside of horn part 401 and the outside of annular part 400.

[0029] With reference to Figure 3 Horn part 401 includes outside wall 401a and inside wall 401b, and outside wall 401a and inside wall 401b are both inclined surface that inclines outward from top to bottom.

[0030] Specifically, the sealing assembly 4 of motor shaft 30 and the cavity in soybean milk machine is the sealing ring structure with horn mouth downward.The sealing step surface 402 below the annular part 400 of sealing ring 40 is abutted on abutment ring 42, and its position is fixed, and the diameter of outside wall 401a of horn part 401 gradually expands from top to bottom, so that multiple-stage pressure self-compensation sealing interface is formed between the outside of sealing ring 40 and the upper base 11, compared with the single lip contact of traditional oil seal, the structure can drive horn part 401 to expand outward under high temperature environment by fluid pressure, dynamically enhances the fit degree of sealing surface, blocks the path of liquid along the axial direction into motor shaft, and fundamentally avoids metal shaft body corrosion.The inside wall 401b of horn part 401 is gradually expanded from top to bottom in diameter, which is convenient for the installation of sealing ring 40 on the one hand, and the double-inclined-surface design of inside and outside walls of horn part 401 further optimizes the pressure transmission path, so that sealing ring 40 generates radial deformation when being stressed in axial direction, forms the active sealing effect of "the greater the pressure, the tighter the sealing", and solves the sealing performance attenuation problem caused by wear of traditional oil seal.

[0031] With reference to Figure 3The motor shaft 30 is provided with the blade assembly 5 above the sealing ring 40, and the upper end of the motor shaft 30 is provided with a cap-shaped nut 44 which is screwed on the blade assembly 5 and the sealing ring 40.

[0032] Specifically, the cap-shaped nut 44 is screwed to axially pre-tighten the blade assembly 5 and the sealing ring 40 to the motor shaft 30, to ensure that the sealing ring 40 is uniformly stressed on the shaft side contact surface, to eliminate local stress concentration caused by assembly deflection, and to keep the sealing interface stable under high-speed rotating conditions.

[0033] Referring to Figure 3 The sealing assembly 4 further comprises a mounting sleeve 43 arranged between the motor shaft 30 and the upper base 11, and the mounting sleeve 43 is provided with an abutting ring 42 which has an L-shaped cross section, and the inner side of the abutting ring 42 is abutted against the sealing step surface 402 at one end and is mounted between the mounting sleeve 43 and the upper base 11 at the other end. The L-shaped abutting ring 42 and the mounting sleeve 43 are combined to form a bidirectional limiting position for the sealing ring 40, to prevent the sealing ring 40 from axially moving or circumferentially deviating under vibration or temperature change, and to ensure the geometric stability of the sealing interface.

[0034] Referring to Figure 2 The base 1 is provided with a casing 2, and the inside of the casing 2 and the upper surface of the upper base 11 form a container cavity of the soybean milk machine, and the power device 3 is arranged below the upper base 11; the edge of the upper base 11 and the inner wall of the casing 2 are provided with a sealing ring assembly 6 which comprises at least one sealing ring 61 arranged between the edge of the upper base 11 and the inner wall of the casing 2.

[0035] Referring to Figure 2 The edge of the upper base 11 and the casing 2 are provided with an annular groove 60, and the annular groove 60 is provided with a T-shaped fixing member 62, which divides the annular groove 60 into upper and lower parts, and the sealing ring 61 is arranged on one side of the fixing member 62 in the upper and lower directions.

[0036] Specifically, the sealing ring assembly 6 is arranged in layers, and the double sealing rings 61 with the T-shaped fixing member 62 are arranged on the edge of the container cavity, and the layered arrangement of the sealing ring 61 further increases the sealing effect and also has a certain damping effect.

[0037] Referring to Figure 4, the base 10 is provided with at least two first mounting columns 100, the upper machine seat 11 is provided with second mounting columns 110 capable of cooperating with the first mounting columns 100, the power device 3 is provided with a mounting bracket 31, and the mounting bracket 31 is fixedly clamped between the first mounting columns 100 and the second mounting columns 110, so that the power device 3 is suspended from the bottom surface of the base 10. The first mounting columns 100 and the second mounting columns 110 are connected and fixed by means of screw holes and mounting screws, which makes the installation of the power device 3 more convenient and efficient, and increases the assembly efficiency.

[0038] Preferably, the mounting bracket 31 is provided with shock-absorbing pads 32 on the upper and lower sides.

[0039] Referring to Figure 4 The lower end of the power device 3 is provided with a cooling fan 33, and the cooling fan 33 is also suspended from the bottom surface of the base 10.

[0040] Specifically, the power device 3 is mainly suspended by the first mounting columns 100 of the base 10 and the second mounting columns 110 of the upper machine seat 11 through the clamping of the mounting bracket 31 on both sides, and the vibration transmission of the power device 3 is reduced through the shock-absorbing pads 32, so as to avoid the generation of micro gaps in the sealing assembly 4 and the sealing ring assembly 6 due to high-frequency mechanical impact, and further improve the sealing performance; at the same time, the suspension layout of the bottom cooling fan 33 enhances the heat dissipation efficiency of the motor, which can accelerate the heat dissipation of the power device 3, thereby reducing the risk of softening of the sealing structure due to high temperature, and indirectly improving the sealing durability.

[0041] Optionally, the sealing ring 40 and the sealing ring 61 are made of high-temperature-resistant rubber material.

[0042] In summary, the sealing assembly structure innovation of the present application significantly improves the sealing reliability and service life of the power device of the soybean milk machine.

Claims

1. A sealing structure of a power device of a soybean milk maker, characterized by, The machine base (1) comprises an upper base (11) for forming the bottom of the container cavity of the soybean milk machine, and a power device (3) arranged in the machine base (1), wherein the power device (3) comprises a motor shaft (30) extending out of the upper base (11), and a sealing assembly (4) is arranged between the shaft side of the motor shaft (30) and the upper base (11). The sealing assembly (4) comprises a sealing ring (40), wherein the sealing ring (40) comprises an annular portion (400) and a flared portion (401) arranged below the annular portion (400), the diameter of the flared portion (401) gradually increases from top to bottom, and a sealing step surface (402) is formed between the outer side of the flared portion (401) and the outer side of the annular portion (400).

2. The sealing structure of a power device of a soybean milk maker according to claim 1, wherein The flared portion (401) comprises an outer side wall (401a) and an inner side wall (401b), both of which are inclined outward from top to bottom.

3. The sealing structure of a power device of a soybean milk maker according to claim 1, wherein A blade assembly (5) is arranged above the sealing ring (40) on the shaft side of the motor shaft (30), a cap-shaped nut (44) is arranged at the upper end of the motor shaft (30), and the cap-shaped nut (44) is screwed on the blade assembly (5) and the sealing ring (40) through threaded connection.

4. The sealing structure of a power device of a soybean milk maker according to claim 1, wherein The sealing assembly (4) further comprises a mounting sleeve (43) arranged between the motor shaft (30) and the upper base (11), the mounting sleeve (43) is provided with an abutting ring (42), the cross section of the abutting ring (42) is L-shaped, one end of the inner side of the abutting ring (42) abuts below the sealing step surface (402), and the other end is mounted between the mounting sleeve (43) and the upper base (11).

5. The sealing structure of a power device of a soybean milk maker according to claim 1, wherein Further comprising a machine shell (2) arranged outside the machine base (1), the inside of the machine shell (2) and the upper surface of the upper base (11) form the container cavity of the soybean milk machine, and the power device (3) is arranged below the upper base (11); a sealing ring assembly (6) is arranged between the edge of the upper base (11) and the inner wall of the machine shell (2), and the sealing ring assembly (6) comprises at least one sealing ring (61) arranged between the edge of the upper base (11) and the inner wall of the machine shell (2).

6. The sealing structure of a soybean milk machine power device according to claim 5, wherein, An annular groove (60) is arranged between the edge of the upper base (11) and the machine shell (2), a fixing member (62) with a T-shaped cross section is arranged in the annular groove (60), the fixing member (62) divides the annular groove (60) into two parts, and the sealing ring (61) is arranged on one side of the fixing member (62) in the upward and downward directions.

7. The sealing structure of a power device of a soybean milk maker according to claim 1, wherein The machine base (1) comprises a base (10) arranged below the upper base (11), at least two first mounting columns (100) are arranged on the base (10), second mounting columns (110) capable of cooperating with the first mounting columns (100) are arranged on the upper base (11), and mounting brackets (31) are arranged on the power device (3), the mounting brackets (31) are fixedly clamped between the first mounting columns (100) and the second mounting columns (110), so that the power device (3) is arranged in a suspended manner relative to the bottom surface of the base (10).

8. The sealing structure of a soybean milk machine power device according to claim 7, characterized in that, The mounting bracket (31) is provided with shock-absorbing pads (32) on both sides.

9. The sealing structure of a power device of a soybean milk maker according to claim 7, wherein, The power device (3) is provided with a heat dissipation fan (33) at the lower end, and the heat dissipation fan (33) is also suspended on the bottom surface of the base (10).

10. The sealing structure of a power device of a soybean milk maker according to claim 5, wherein, The sealing ring (40) and the sealing ring (61) are made of high-temperature-resistant rubber.

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