Anti-overflow miniature centrifugal pump shell and miniature centrifugal pump

Abstract

The utility model is specifically related to a kind of anti-overflowing glue micro centrifugal pump shell and micro centrifugal pump, anti-overflowing glue water pump shell includes shell and the rear end cover of setting in the rear end of shell, rear end cover is penetrated with glue pouring hole and lead slot along its axial direction on it, rear end cover includes the end cap portion located outside shell and the connecting cylinder portion that intrudes into shell inner chamber, connecting cylinder portion and shell inner chamber wall shape adaptation and fit arrangement are set, buckle cooperation connection structure is set between connecting cylinder portion and shell. Connecting cylinder portion and shell are connected between the convenient assembly of buckle cooperation connection structure, and connecting stable simultaneously;Waterproof glue is generally higher in density, and flow speed is slower, connecting cylinder portion and shell inner chamber wall shape adaptation and fit arrangement can effectively form the first interception of waterproof glue overflow, reduce the flow speed and glue amount of waterproof glue outward seepage, effectively prevent waterproof glue from overflowing from the gap between the two when glue pouring.

Description

Technical Field

[0001] This utility model relates to the field of water pump technology, specifically to an anti-overflow micro centrifugal pump housing and a micro centrifugal pump. Background Technology

[0002] The core component of a miniature centrifugal pump is the motor. Its stator windings, rotor magnets, and drive circuit board (PCB) are all highly susceptible to water, moisture, and corrosive liquid vapors. Furthermore, the pump inevitably comes into contact with liquids during operation. Even if the design prevents direct contact between the liquid and the motor cavity, the risks of moisture, condensation, and potential leakage always exist. Therefore, after installation, the pump needs to be inverted, and waterproof adhesive is injected into the housing through the injection hole on the rear end cover to form a sealing barrier. This completely encloses and isolates sensitive electronic components such as the motor windings, PCB, sensors, and connectors from the external environment, preventing the intrusion of liquids, moisture, dust, and chemical vapors. This avoids short circuits, corrosion, leakage, and insulation failure, thereby significantly improving reliability and service life.

[0003] Existing micro centrifugal pumps consist of a housing and a rear end cover. The rear end cover has a lead hole for wires to pass through. The housing and rear end cover are ultrasonically welded together. While this structure effectively prevents glue overflow, the ultrasonic welding process is complex and requires the wires to be passed through the rear end cover before welding. Wire interference during welding causes operational inconvenience. Therefore, there is an urgent need to design a micro centrifugal pump housing structure that is easy to assemble, has a stable connection, and effectively prevents glue overflow. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an anti-overflow micro centrifugal pump housing and a micro centrifugal pump.

[0005] The technical solution adopted by this utility model is as follows: a micro centrifugal pump housing for preventing glue overflow, comprising an outer shell and a rear end cover disposed at the rear end of the outer shell, wherein the rear end cover has a glue-filling hole and a lead wire groove extending through it along its axial direction.

[0006] The rear end cover includes an end cover portion located outside the outer shell and a connecting cylinder portion extending into the inner cavity of the outer shell. The connecting cylinder portion is adapted to and fitted to the shape of the inner cavity wall of the outer shell, and a snap-fit ​​connection structure is provided between the connecting cylinder portion and the outer shell.

[0007] Preferably, the outer peripheral wall of the connecting cylinder is provided with a protruding buckle relative to the inner cavity wall of the outer shell, and the inner cavity wall of the outer shell is provided with a corresponding groove. The buckle extends into the groove so that the connecting cylinder and the outer shell form a buckle-fit connection structure.

[0008] Preferably, the end cap portion and the connecting cylinder portion are concentrically arranged, and the size of the end cap portion is larger than the size of the connecting cylinder portion, such that the lower end surface of the end cap portion forms a first abutting surface around the circumference of the connecting cylinder portion, and the first abutting surface abuts and engages with the rear end surface of the outer shell.

[0009] Preferably, the rear end face of the outer shell is provided with an overflow groove.

[0010] Preferably, the lead groove is a semi-hole located on the outer periphery of the rear end cover and has an open opening located on its radially outer side. The rear end face of the housing extends upward at the position corresponding to the open opening and forms an extension plate that inserts into the open opening and forms a radial closure of the lead groove.

[0011] Preferably, the lead groove has baffles extending from the inner periphery of the lead groove to the center on both sides near the opening. The radial outer side of the baffles forms a slot with the inner periphery of the lead groove. The extension plate is adapted to the shape of the slot and is inserted into the slot.

[0012] A second aspect of this invention provides a water pump comprising the anti-overflow adhesive water pump housing as described above.

[0013] The beneficial effects of this utility model are as follows: the connecting cylinder and the outer shell are connected by a snap-fit ​​structure to achieve convenient assembly and stable connection; waterproof adhesive generally has a high density and a slow flow rate. The shape of the connecting cylinder and the inner wall of the outer shell are adapted and fitted to each other, which can effectively form the first line of defense against the overflow of waterproof adhesive, reduce the flow rate and amount of waterproof adhesive leaking out, and effectively prevent the waterproof adhesive from overflowing from the gap between the two during the dispensing process. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0015] Figure 1 This is a perspective structural diagram of an embodiment of the present utility model;

[0016] Figure 2 This is a partial exploded view of an embodiment of the present utility model;

[0017] Figure 3 This is a rear view structural diagram of an embodiment of the present utility model;

[0018] Figure 4 for Figure 3 Sectional view of the structure at point AA;

[0019] Figure 5for Figure 4 Enlarged view of the structure at point B in the middle;

[0020] Figure 6 This is a perspective view of the rear cover in an embodiment of the present utility model;

[0021] Figure 7 This is a perspective view of the outer shell in an embodiment of the present utility model;

[0022] Figure 8 for Figure 7 Enlarged view of the structure at point C;

[0023] In the figure, 1 is the outer shell; 2 is the rear end cover; 11 is the slot; 12 is the overflow groove; 21 is the end cover part; 22 is the connecting cylinder part; 101 is the extension plate; 201 is the glue filling hole; 202 is the lead wire groove; 204 is the glue baffle plate; 205 is the slot; 211 is the first abutment surface; 221 is the buckle; 2021 is the opening. Detailed Implementation

[0024] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0025] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0026] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0027] like Figures 1 to 8 As shown in the figure, a miniature centrifugal pump according to an embodiment of the present invention includes an anti-overflow glue pump housing. The anti-overflow glue pump housing includes an outer shell 1 and a rear end cover 2 disposed at the rear end of the outer shell 1. The rear end cover 2 has a glue-filling hole 201 and a lead wire groove 202 extending through it along its axial direction. The lead wire groove 202 allows wires to pass through.

[0028] The rear end cover 2 includes an end cover portion 21 located outside the outer shell 1 and a connecting cylinder portion 22 extending into the inner cavity of the outer shell 1. The connecting cylinder portion 22 is adapted to and fitted to the shape of the inner cavity wall of the outer shell 1, and a snap-fit ​​connection structure is provided between the connecting cylinder portion 22 and the outer shell 1.

[0029] This design allows for convenient and stable assembly of the connecting cylinder and the outer shell via a snap-fit ​​connection. Waterproof adhesive generally has a high density and slow flow rate. The fitted shape and close fit between the connecting cylinder and the inner wall of the outer shell effectively form the first line of defense against adhesive leakage, reducing the flow rate and amount of adhesive seeping out and preventing overflow during application. Specifically, the fit between the connecting cylinder and the inner wall of the outer shell can be achieved by having the same dimensions or by an interference fit. In this embodiment, an interference fit is used to further enhance the connection strength between the connecting cylinder and the outer shell and to prevent adhesive leakage.

[0030] The outer peripheral wall of the connecting cylinder 22 is provided with a protruding buckle 221 relative to the inner cavity wall of the outer shell 1, and the inner cavity wall of the outer shell 1 is provided with a corresponding groove 11. The buckle 221 extends into the groove 11 so that the connecting cylinder 22 and the outer shell 1 form a buckle-fit connection structure.

[0031] This design improves the ease of assembly and structural compactness between the connecting cylinder and the outer shell.

[0032] The end cap 21 and the connecting cylinder 22 are concentrically arranged. The size of the end cap 21 is larger than the size of the connecting cylinder 22, so that the lower end surface of the end cap 21 forms a first abutting surface 211 around the circumference of the connecting cylinder 22. The first abutting surface 211 abuts and engages with the rear end face of the outer shell 1.

[0033] This design prevents the waterproof adhesive from overflowing between the rear end face of the housing and the lower end of the end cap.

[0034] The rear end face of the outer shell 1 is provided with an overflow groove 12.

[0035] The amount and flow rate of waterproof adhesive that continues to leak out after the first interception are greatly reduced. The waterproof adhesive that has passed through the first interception is then intercepted a second time in the overflow trough, preventing further leakage and ensuring that there is no overflow of adhesive on the appearance of the water pump. The cross-sectional shape of the overflow trough can be specifically set according to actual needs, such as square, arc, trapezoid, etc. In this embodiment, a square shape is used to provide a larger overflow space.

[0036] The lead groove 202 is a semi-hole located on the outer periphery of the rear end cover 2 and has an open opening 2021 located on its radially outer side. The rear end face of the outer shell 1 extends upward at the position corresponding to the open opening 2021, and has an extension plate 101 that inserts into the open opening 2021 and forms a radial closure of the lead groove 202.

[0037] This design improves the ease of wire assembly.

[0038] The lead groove 202 has baffle plates 204 extending towards the center on both sides of the inner periphery near the opening 2021. The radial outer side of the baffle plate 204 forms a slot 205 with the inner periphery of the lead groove 202. The extension plate 101 is adapted to the shape of the slot 205 and is inserted into the slot 205.

[0039] This design allows the extension plate to fit into the slot, further preventing waterproof adhesive from overflowing and creating a third layer of protection against it.

[0040] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A micro centrifugal pump housing for preventing glue spillage, comprising an outer shell (1) and a rear end cover (2) disposed at the rear end of the outer shell (1), wherein the rear end cover (2) has a glue-filling hole (201) and a lead wire groove (202) extending through it along its axial direction, characterized in that: The rear end cover (2) includes an end cover (21) located outside the outer shell (1) and a connecting cylinder (22) extending into the inner cavity of the outer shell (1). The connecting cylinder (22) is adapted to the shape of the inner cavity wall of the outer shell (1) and fits snugly. A snap-fit ​​connection structure is provided between the connecting cylinder (22) and the outer shell (1).

2. The anti-overflow micro centrifugal pump housing according to claim 1, characterized in that: The outer peripheral wall of the connecting cylinder (22) is provided with a protruding buckle (221) relative to the inner wall of the outer shell (1), and the inner wall of the outer shell (1) is provided with a corresponding slot (11). The buckle (221) extends into the slot (11) so that the connecting cylinder (22) and the outer shell (1) form a buckle-fit connection structure.

3. The anti-overflow micro centrifugal pump housing according to claim 1, characterized in that: The end cap (21) and the connecting cylinder (22) are concentrically arranged. The size of the end cap (21) is larger than that of the connecting cylinder (22) so that the lower end face of the end cap (21) forms a first abutting surface (211) around the circumference of the connecting cylinder (22). The first abutting surface (211) abuts against the rear end face of the outer shell (1).

4. The anti-overflow micro centrifugal pump housing according to claim 3, characterized in that: The rear end face of the outer shell (1) is provided with an overflow groove (12).

5. The anti-overflow micro centrifugal pump housing according to claim 1, characterized in that: The lead groove (202) is a half hole located on the outer periphery of the rear end cover (2) and has an opening (2021) located on its radially outer side. The rear end face of the outer shell (1) extends upward at the position corresponding to the opening (2021) and has an extension plate (101) that inserts the opening (2021) and forms a radially closed extension plate for the lead groove (202).

6. The anti-overflow micro centrifugal pump housing according to claim 5, characterized in that: The lead groove (202) has baffles (204) extending towards the center on both sides of the inner periphery near the opening (2021). The radial outer side of the baffles (204) forms slots (205) with the inner periphery of the lead groove (202). The extension plate (101) is adapted to the shape of the slot (205) and is inserted into the slot (205).

7. A miniature centrifugal pump, characterized in that, It includes the anti-overflow micro centrifugal pump housing as described in any one of claims 1-6.

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