Miniature water pump umbrella anti-sticking structure

Abstract

The utility model relates to the technical field of miniature water pumps, and discloses a miniature water pump umbrella anti-sticking structure which comprises a base, a motor, a steel shaft, a fork shaft, a pump body, an umbrella and a cover bottom. A torsion shaft is arranged on an output shaft of the motor, the steel shaft is connected to the top end of the torsion shaft, and the fork shaft is driven by the steel shaft to swing up and down. According to the umbrella anti-sticking structure of the miniature water pump, a physical isolation layer is formed in a non-working state through a radial gap structure formed by the annular anti-sticking sealing ring arranged on the side face of the umbrella and the groove in the cover bottom, the interface sticking phenomenon caused by medium residues is avoided, and it is ensured that the water pump can still be normally started after being stopped for a long time; the anti-sticking sealing ring with the U-shaped section is matched with the labyrinth type groove, the sealing performance is guaranteed, meanwhile, tiny deformation compensation is allowed, the sealing device can adapt to the temperature deformation difference ranging from-20 DEG C to 80 DEG C, and the leakage problem caused by thermal expansion and cold contraction of traditional plane sealing is effectively solved. And the mechanical vibration amplitude is controlled at a micron level.

Description

Technical Field

[0001] This utility model relates to the field of micro water pump technology, specifically to a micro water pump umbrella anti-sticking structure. Background Technology

[0002] Miniature water pumps, as core components for fluid transport, are widely used in household appliances, medical equipment, and industrial automation. Among them, umbrella-type miniature water pumps, due to their compact structure and strong self-priming performance, are of significant value in scenarios such as agricultural irrigation and car washing.

[0003] Existing micro water pumps often employ a planar sealing design for their umbrella-like structure and bottom cover, resulting in a large contact area (typically exceeding 70%). This leads to the formation of an adhesion layer of residual media at the interface. Experiments show that after 72 hours of static storage in an environment with humidity >60%, the starting resistance torque of conventional structures increases by more than 200%, severely restricting equipment reliability. Traditional sealing structures rely on the deformation compensation of a single elastomer (such as silicone gaskets). Under temperature variations from -20℃ to 80℃, differences in the linear expansion coefficients of the materials cause micron-level gaps on the sealing surface, resulting in leakage rates of up to 0.8 ml / min. Straight-through outlet channel designs experience excessive pressure loss when the flow rate requirement is >50 ml / min. Some umbrella valve structures suffer from insufficient guide groove depth (<0.2 mm), leading to eddy current losses and an actual efficiency of only 65%-72%, increasing energy consumption. Existing seals have stringent tolerance requirements for fit with the pump body (gap ≤0.02 mm), resulting in a low assembly qualification rate. Furthermore, component wear cannot be self-compensated after long-term use.

[0004] Therefore, it is necessary to propose a micro water pump umbrella anti-sticking structure. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a micro water pump umbrella anti-stick structure, which has the advantages of achieving low adhesion and high reliability, and overcomes the defects of existing technologies mentioned in the background art.

[0006] This utility model provides the following technical solution: a micro water pump umbrella anti-stick structure, including a base, a motor, a steel shaft, a fork shaft, a pump body, an umbrella, and a cover bottom;

[0007] The motor has a torsion shaft on its output shaft, and the steel shaft is connected to the top of the torsion shaft. The fork shaft is driven to swing up and down by the steel shaft.

[0008] The pump body is located between the base and the bottom of the cover. The top of the pump body is equipped with an umbrella, and the side of the umbrella is equipped with an anti-stick sealing ring. The width of the anti-stick sealing ring is 0.1-1mm and the height is 0.05-1mm.

[0009] The bottom of the cover has a groove corresponding to the position of the umbrella. The groove and the anti-stick sealing ring form a radial gap with a radial distance of 0.05-0.5mm.

[0010] Preferably, the anti-stick sealing ring is made of silicone or fluororubber material, and its cross-section is U-shaped, forming a labyrinth-like sealing channel with the groove.

[0011] Preferably, the pump body is connected to the gasket via an air chamber, and the gasket is provided with a one-way water outlet. When the pump body is stretched, it forms a negative pressure at the umbrella to draw in water, and when it is compressed, it discharges the water through the gasket.

[0012] Preferably, the motor drives the drive shaft via an eccentric wheel, the drive shaft is connected to a crank, the crank drives the fork shaft to reciprocate, and the swing angle of the fork shaft is 30-60°.

[0013] Preferably, the bottom of the groove is provided with a guide channel, and the guide channel is connected to the water outlet channel, and the depth of the guide channel is 0.2-0.8mm.

[0014] Preferably, the contact surface between the anti-stick sealing ring and the groove is provided with a nano-hydrophobic coating, and the contact angle is greater than 120°.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] This miniature water pump's umbrella-like anti-stick structure utilizes a radial gap formed by an annular anti-stick sealing ring on the side of the umbrella and a groove at the bottom of the cover. In the non-working state, this creates a physical isolation layer, preventing interface adhesion caused by residual media and ensuring the pump can still start normally after long-term storage. The U-shaped anti-stick sealing ring, combined with the labyrinthine groove, ensures sealing while allowing for minor deformation compensation, adapting to temperature variations from -20℃ to 80℃. This effectively solves the leakage problem caused by thermal expansion and contraction in traditional planar seals. The coordinated design of the fork shaft swing mechanism and spring damping device controls mechanical vibration amplitude to the micrometer level, reducing the risk of component fatigue damage and significantly extending the service life of key moving parts of the pump. The gradient design of the guide channel and outlet channel, combined with the one-way valve assembly, forms a highly efficient fluid dynamic circulation, increasing the water delivery per unit time while ensuring sealing and reducing energy loss. The elastic material properties of the anti-stick sealing ring, combined with the positioning structure of the groove, ensure self-positioning accuracy during assembly and compensate for component deformation caused by long-term use, improving product consistency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model;

[0019] Figure 2 This is a schematic diagram of the umbrella and cover assembly structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the assembly structure of the umbrella and the bottom cover of this utility model;

[0021] Figure 4 This is a schematic diagram of the bottom cover structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the umbrella structure of this utility model.

[0023] The attached diagram lists the components represented by each number as follows:

[0024] 1. Top cover; 2. Umbrella; 21. Anti-stick sealing ring; 3. Bottom cover; 31. Groove; 4. Air chamber; 5. Pump body; 6. Base; 7. Torsion shaft; 8. Motor; 9. Gasket; 10. Fork shaft; 11. Steel shaft. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figures 1-5 As shown, a micro water pump umbrella anti-stick structure includes a base 6, a motor 8, a steel shaft 11, a fork shaft 10, a pump body 5, an umbrella 2, and a cover bottom 3.

[0027] A torsion shaft 7 is provided on the output shaft of motor 8, and a steel shaft 11 is connected to the top of the torsion shaft 7. The fork shaft 10 is driven to swing up and down through the steel shaft 11.

[0028] The pump body 5 is located between the base 6 and the cover bottom 3. The top of the pump body 5 is provided with an umbrella 2, and the side of the umbrella 2 is provided with an anti-stick sealing ring 21. The width of the anti-stick sealing ring 21 is 0.1-1mm and the height is 0.05-1mm.

[0029] The bottom cover 3 has a groove 31 corresponding to the position of the umbrella 2. The groove 31 and the anti-stick sealing ring 21 form a radial gap, and the radial distance of the gap is 0.05-0.5mm.

[0030] Preferably, the anti-stick sealing ring 21 is made of silicone or fluororubber material, and its cross-section is U-shaped, forming a labyrinth-like sealing channel with the groove 31.

[0031] In a further preferred embodiment, the pump body 5 is connected to the gasket 9 via the air chamber 4. The gasket 9 is provided with a one-way water outlet 91. When the pump body 5 is stretched, a negative pressure is formed at the umbrella 2 to draw in water. When compressed, the water is discharged through the gasket 9.

[0032] In a further preferred embodiment, the motor 8 drives the drive shaft via an eccentric wheel, the drive shaft is connected to a crank, and the crank drives the fork shaft 10 to reciprocate, with the swing angle of the fork shaft 10 being 30-60°.

[0033] More preferably, the bottom of the groove 31 is provided with a guide groove, and the guide groove is connected to the water outlet channel, and the depth of the guide groove is 0.2-0.8mm.

[0034] More preferably, the contact surface between the anti-stick sealing ring 21 and the groove 31 is provided with a nano-hydrophobic coating, and the contact angle is greater than 120°.

[0035] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., 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 connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A micro water pump umbrella anti-stick structure, comprising: Base (6), motor (8), steel shaft (11), fork shaft (10), pump body (5), umbrella (2) and cover bottom (3); The output shaft of the motor (8) is provided with a torsion shaft (7), and the steel shaft (11) is connected to the top of the torsion shaft (7). The fork shaft (10) is driven to swing up and down through the steel shaft (11). The pump body (5) is located between the base (6) and the cover bottom (3). The top of the pump body (5) is provided with an umbrella (2), and the side of the umbrella (2) is provided with an anti-stick sealing ring (21). The width of the anti-stick sealing ring (21) is 0.1-1mm and the height is 0.05-1mm. The bottom cover (3) is provided with a groove (31) corresponding to the position of the umbrella (2). The groove (31) and the anti-stick sealing ring (21) form a radial gap, and the radial distance of the gap is 0.05-0.5mm.

2. The anti-stick structure for a miniature water pump umbrella according to claim 1, characterized in that: The anti-stick sealing ring (21) is made of silicone or fluororubber material, and its cross-section is U-shaped, forming a labyrinth-like sealing channel with the groove (31).

3. The anti-stick structure for a miniature water pump umbrella according to claim 1, characterized in that: The pump body (5) is connected to the gasket (9) through the air chamber (4). The gasket (9) is provided with a one-way water outlet (91). When the pump body (5) is stretched, it forms a negative pressure at the umbrella (2) to draw in water. When it is compressed, it discharges water through the gasket (9).

4. The anti-stick structure for a miniature water pump umbrella according to claim 1, characterized in that: The motor (8) drives the drive shaft through the eccentric wheel. The drive shaft is connected to the crank, and the crank drives the fork shaft (10) to reciprocate. The swing angle of the fork shaft (10) is 30-60°.

5. The anti-stick structure for a miniature water pump umbrella according to claim 1, characterized in that: The bottom of the groove (31) is provided with a guide groove, and the guide groove is connected to the water outlet channel. The depth of the guide groove is 0.2-0.8mm.

6. The anti-stick structure for a miniature water pump umbrella according to claim 1, characterized in that: The contact surface between the anti-stick sealing ring (21) and the groove (31) is provided with a nano-hydrophobic coating, and the contact angle is greater than 120°.

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