Micromotor assembly with good waterproof effect

Abstract

The utility model provides a micromotor assembly with good waterproof effect, which comprises a lower cover body and an upper cover body fixed at the top of the lower cover body, the lower cover body is cylindrical, a motor is arranged in the lower cover body, a copper cover is embedded at the bottom of the lower cover body, and the motor outputs power through a magnetic transmission assembly; the top of the motor is covered with a sealing cover, the top of the sealing cover is provided with a wire passing hole, the top of the sealing cover is sequentially provided with a second flat gasket, a first flat gasket and a pressing ring from bottom to top, the second flat gasket is provided with a wire penetrating hole aligned with the wire passing hole, and the pressing ring is fixed to the top of the sealing cover through a screw and presses the first flat gasket; pouring sealant is filled between the top of the sealing cover and the upper cover body. According to the utility model, on one hand, materials with strong waterproof capability are adopted to prevent water molecules from seeping in a long-term use process, and on the other hand, various sealing structures are adopted to prevent water from seeping in gaps and threading holes among parts, so that the waterproof performance of the assembly is effectively improved, and the water is prevented from contacting a motor after seeping.

Description

Technical Field

[0001] This utility model relates to a component of a smart water meter, and more particularly to a micro motor assembly with good waterproof performance. Background Technology

[0002] In some parts of my country, water meters are often installed in underground wells, which has advantages such as not occupying ground space and facilitating centralized management and maintenance. However, during the rainy season, the water meters are submerged in water. Especially when the drainage outlets of some wells are blocked, the water meters are submerged for extended periods, placing extremely stringent requirements on the waterproof and moisture-proof performance of smart water meters. Currently, most water meter manufacturers use a split structure when manufacturing these meters. The base meter is installed on the water pipe, while the electronic module and battery are encapsulated and hung at the top of the well. These components are connected via wires to the metering sensors on the base meter and the micro-motor on the valve's electric actuator. To ensure the motor can operate stably and reliably in this environment for extended periods, the waterproof performance of the micro-motor needs to be optimized. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] The purpose of this invention is to provide a micro-motor assembly with good waterproof performance, which can effectively prevent water from penetrating into the motor. To achieve the above objective, this invention adopts the following technical solution:

[0005] (II) Technical Solution

[0006] A waterproof micro-motor assembly includes a lower cover and an upper cover fixed on top of it. The lower cover is cylindrical and houses a motor inside, with a copper shield embedded at the bottom. The motor outputs power through a magnetic transmission assembly. A sealing cover is provided on the top of the motor. The sealing cover has a wire-passing hole on its top, and from bottom to top, a second flat gasket, a first flat gasket, and a pressure ring are arranged on the top of the sealing cover. The second flat gasket has a wire-passing hole aligned with the wire-passing hole. The pressure ring is fixed to the top of the sealing cover with screws and presses the first flat gasket tightly. The space between the top of the sealing cover and the upper cover is filled with potting compound.

[0007] Furthermore, the top of the upper cover has a tapered hole that is larger on the outside and smaller on the inside. A tapered sealing ring is provided inside the tapered hole. The top of the tapered sealing ring is pressed by a locking nut, which is fixed to the top of the upper cover by threads.

[0008] Furthermore, an elastic compression block is provided between the top of the motor and the inner wall of the sealing cover.

[0009] Furthermore, the top of the copper cover is embedded in the bottom of the sealing cover, and an O-ring is provided between the bottom of the sealing cover and the inner wall of the lower cover, with the O-ring being fitted onto the copper cover.

[0010] Furthermore, a support ring is provided at the bottom of the O-ring seal, and the support ring is supported by the inner wall of the lower cover and sleeved on the copper cover.

[0011] Furthermore, an O-ring is provided between the copper cover and the lower cover.

[0012] Furthermore, the upper cover and the lower cover are fixedly connected by ultrasonic welding.

[0013] Furthermore, a sleeve is provided at the top of the sealing cover, and the second flat washer, the first flat washer and the pressure ring are all sleeved on the sleeve. The screw passes through the pressure ring and is screwed into the sleeve.

[0014] Furthermore, the inner wall of the upper cover is provided with a pressure block, which abuts against the top of the sealing cover.

[0015] Furthermore, the sealing cover is made of PE material.

[0016] (III) Beneficial Effects

[0017] This utility model has significant advantages and beneficial effects compared with the prior art, specifically:

[0018] 1. Place the motor between the copper cover and the sealing cover. The water-resistant properties of the metal prevent water from seeping in from the bottom and contacting the motor.

[0019] 2. An upper cover is provided outside the sealing cover, forming two layers of isolation to prevent the sealing cover from being subjected to water pressure and improve waterproof performance;

[0020] 3. After the enameled wire passes through the wire hole of the sealing cover, it also needs to pass through the wire hole of the second flat gasket, and then be pressed down by the first flat gasket, so that the upper and lower sides of the enameled wire are covered by flexible material to prevent water leakage.

[0021] 4. The top of the upper cover has a conical hole that is plugged by a conical sealing ring. When the conical sealing ring is squeezed by the locking nut, it will be squeezed inward in the conical hole, thereby preventing the formation of a gap between it and the cable sleeve and effectively improving the sealing performance.

[0022] 5. The upper cover is pressed by the pressure block to compress the sealing cover, and the sealing cover is pressed by the pressure block to compress the motor, thereby compressing the O-ring between the sealing cover and the lower cover, as well as the O-ring between the copper cover and the lower cover, improving the waterproof performance of the bottom. Attached Figure Description

[0023] The present invention will now be further described with reference to the accompanying drawings and embodiments.

[0024] Figure 1 This is a cross-sectional view of the present invention at the tapered hole;

[0025] Figure 2 This is a cross-sectional view of the present invention at the wire hole;

[0026] Figure 3 yes Figure 2 A magnified view of a portion of point I.

[0027] Explanation of icon numbers:

[0028] 1. Lower cover; 2. Upper cover; 201. Conical hole;

[0029] 202. Press block; 3. Motor; 4. Copper cover;

[0030] 5. Sealing cover; 501. Wire hole; 502. Sleeve;

[0031] 6. Extrusion block; 7. Screw; 8. Pressure ring;

[0032] 9. First flat washer; 10. Second flat washer; 1001. Thread hole;

[0033] 11. Lock nut; 12. Conical sealing ring; 13. Wire;

[0034] 14. Enameled wire; 15. O-ring seal; 16. Support ring. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0036] In the description of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying 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.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," 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 communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0039] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0040] Please see Figures 1 to 3 As shown, a waterproof micro-motor assembly includes a lower cover 1 and an upper cover 2 fixed on top of it. Specifically:

[0041] The lower cover 1 is cylindrical, with a motor 3 inside and a copper cover 4 embedded at the bottom. The motor 3 outputs power through a magnetic transmission component.

[0042] The top of the motor 3 is covered with a sealing cover 5, and the space between the top of the sealing cover 5 and the upper cover 2 is filled with potting compound.

[0043] The top of the sealing cover 5 has a wire hole 501, and the top of the sealing cover 5 is provided with a second flat pad 10, a first flat pad 9 and a pressure ring 8 from bottom to top. The second flat pad 10 has a wire hole 1001 that is aligned with the wire hole 501. The pressure ring 8 is fixed to the top of the sealing cover 5 by screws 7 and presses the first flat pad 9.

[0044] Through the above technical solution, firstly, one end of the enameled wire 14 is connected to the motor, and the other end passes through the wire passage hole 501 and the wire threading hole 1001. Then, the pressure ring 8 is used to press the first flat gasket 9, thereby sealing the wire passage hole 501 and the wire threading hole 1001 and preventing moisture from entering the sealing cover 5 and affecting the motor 3. Secondly, an upper cover 2 is provided on the outside of the sealing cover 5, so that the sealing cover 5 does not bear water pressure, further improving the waterproof performance of the device. Finally, the copper cover 4 is made of metal material, which can isolate water molecules and prevent water molecules from penetrating.

[0045] It is worth mentioning that, in order to prevent moisture from entering the upper cover 2, a conical hole 201 with a larger outer diameter and a smaller inner diameter is opened at the top of the upper cover 2. A conical sealing ring 12 is provided in the conical hole 201. The top of the conical sealing ring 12 is pressed by a locking nut 11. The locking nut 11 is fixed to the top of the upper cover 2 by threads.

[0046] With the above technical solution, the enameled wire 14 passes through the conical sealing ring 12 after being wrapped with the wire sheath 13. Then, the locking nut 11 presses the conical sealing ring 12. After being pressed, the conical sealing ring 12 deforms inward in the conical hole 201, holding the wire sheath 13 tightly, preventing water from leaking from the conical sealing ring 12 and the conical hole 201.

[0047] It is understood that the O-ring 15 has a support ring 16 at its bottom, which is supported by the inner wall of the lower cover 1 and fitted onto the copper cover 4. This design utilizes the support ring 16 in conjunction with the sealing cover 5 to jointly compress the O-ring 15, rather than directly using the upper surface of the stepped hole for compression. This increases the diameter of the stepped hole at the bottom of the lower cover 1 (i.e., reduces the width of the upper surface of the stepped hole, requiring only the support ring 16 to be supported), facilitating assembly.

[0048] It should be noted that an O-ring 15 is also provided between the copper cover 4 and the lower cover 1, serving as an external defense to reduce the waterproof pressure between the copper cover 4 and the sealing cover 5. Simultaneously, an elastic compression block 6 is provided between the top of the motor 3 and the inner wall of the sealing cover 5. The top of the copper cover 4 is embedded in the bottom of the sealing cover 5, and an O-ring 15 is provided between the bottom of the sealing cover 5 and the inner wall of the lower cover 1, with the O-ring 15 fitted onto the copper cover 4.

[0049] Through the above technical solution, the sealing cover 5 presses down on the pressing block 6, and the pressing block 6 presses down on the motor 3, thereby pressing the O-ring 15 tightly with the sealing cover 5 to prevent water from leaking between the copper cover 4 and the sealing cover 5.

[0050] It is worth mentioning that the upper cover 2 and the lower cover 1 are fixedly connected by ultrasonic welding, so that there is no gap between the two and completely isolates water vapor.

[0051] It should be added that, in order to avoid the screw 7 penetrating the sealing cover 5 and forming a new leakage point when it is screwed in, a sleeve 502 is provided on the top of the sealing cover 5. The second flat washer 10, the first flat washer 9 and the pressure ring 8 are all sleeved on the sleeve 502. The screw 7 passes through the pressure ring 8 and is screwed into the sleeve 502.

[0052] By setting a sleeve 502 on the top of the sealing cover 5, the depth of screw 7 screwing in is ensured, which effectively improves the reliability. At the same time, the second flat washer 10, the first flat washer 9 and the pressure ring 8 are all sleeved on the sleeve 502, which improves the stability of the three and prevents displacement.

[0053] Preferably, the inner wall of the upper cover 2 is provided with a pressure block 202, which abuts against the top of the sealing cover 5, so that the sealing cover 5 presses down to tighten the O-ring 15.

[0054] Preferably, the sealing cover 5 is made of PE material, which has lower water permeability compared to traditional PVC material; while the upper and lower covers can be made of PVC material to accommodate the complex operating environment inside the well.

[0055] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

Claims

1. A micro-motor assembly with good waterproof performance, characterized in that: The device includes a lower cover (1) and an upper cover (2) fixed on top of it. The lower cover (1) is cylindrical and has a motor (3) inside and a copper cover (4) embedded at the bottom. The motor (3) outputs power through a magnetic transmission assembly. A sealing cover (5) is provided on the top of the motor (3). The sealing cover (5) has a wire hole (501) on the top. The top of the sealing cover (5) is provided with a second flat pad (10), a first flat pad (9) and a pressure ring (8) from bottom to top. The second flat pad (10) has a wire hole (1001) aligned with the wire hole (501). The pressure ring (8) is fixed on the top of the sealing cover (5) by screws (7) and presses the first flat pad (9). The space between the top of the sealing cover (5) and the upper cover (2) is filled with potting compound.

2. The micro-motor assembly with good waterproof effect according to claim 1, characterized in that: The top of the upper cover (2) has a conical hole (201) that is larger on the outside and smaller on the inside. A conical sealing ring (12) is provided in the conical hole (201). The top of the conical sealing ring (12) is pressed by a locking nut (11). The locking nut (11) is fixed to the top of the upper cover (2) by threads.

3. The micro-motor assembly with good waterproof effect according to claim 1, characterized in that: An elastic compression block (6) is provided between the top of the motor (3) and the inner wall of the sealing cover (5).

4. The micro-motor assembly with good waterproof effect according to claim 1, characterized in that: The top of the copper cover (4) is embedded in the bottom of the sealing cover (5), and an O-ring (15) is provided between the bottom of the sealing cover (5) and the inner wall of the lower cover (1). The O-ring (15) is fitted on the copper cover (4).

5. A micro-motor assembly with good waterproof performance according to claim 4, characterized in that: The bottom of the O-ring (15) is provided with a support ring (16), which is supported by the inner wall of the lower cover (1) and sleeved on the copper cover (4).

6. The micro-motor assembly with good waterproof effect according to claim 1, characterized in that: An O-ring (15) is provided between the copper cover (4) and the lower cover (1).

7. The micro-motor assembly with good waterproof effect according to claim 1, characterized in that: The upper cover (2) and the lower cover (1) are fixedly connected by ultrasonic welding.

8. The micro-motor assembly with good waterproof effect according to claim 1, characterized in that: The top of the sealing cover (5) is provided with a sleeve (502), the second flat washer (10), the first flat washer (9) and the pressure ring (8) are all sleeved on the sleeve (502), and the screw (7) passes through the pressure ring (8) and is screwed into the sleeve (502).

9. A micro-motor assembly with good waterproof performance according to claim 1, characterized in that: The inner wall of the upper cover (2) is provided with a pressure block (202), which abuts against the top of the sealing cover (5).

10. A micro-motor assembly with good waterproof performance according to claim 1, characterized in that: The sealing cover (5) is made of PE material.

Images