A waterproof motor

Abstract

The present invention discloses a waterproof motor, belonging to the field of electric motors, and solves the problem in the prior art of increased production costs caused by waterproof structures for circuit boards. The technical solution to this problem mainly includes a housing, a rotor, a stator, and a circuit board. The rotor includes a rotating shaft, both ends of which are positioned in the housing via bearings. The output shaft head of the rotating shaft extends from the front end of the housing. A waterproof member is provided within the housing, which is sealed to the housing and encloses a sealed cavity. The circuit board is located within the sealed cavity. The waterproof member has a water leakage channel, through which the rotating shaft passes. The rear end of the housing is provided with a water leakage through-hole connected to the water leakage channel. The present invention is mainly used to reduce the impact of the provision of a waterproof structure on the motor structure, thereby avoiding increased production costs.

Description

Technical Field

[0001] The present invention relates to an electric motor, in particular to a waterproof electric motor. Background Art

[0002] An existing motor includes a housing, a rotor, a stator, and a circuit board. The rotor includes a rotating shaft, which is positioned in the housing at both ends via bearings. The output shaft protrudes from the front end of the housing. For proper operation of the circuit board, it must be waterproof and sealed. Numerous prior art patents describe providing a sealed cavity inside or outside the housing to ensure a waterproof and sealed environment for the circuit board. However, these sealed cavities are often offset relative to the rotating shaft, requiring the redesign of a new mold to mold the housing into a specific structure, which increases production costs for manufacturers. Summary of the Invention

[0003] The object to be achieved by the present invention is to provide a waterproof motor, reduce the impact of setting a waterproof structure on the motor structure, and avoid increasing production costs.

[0004] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a waterproof motor, including a housing, a rotor, a stator and a circuit board, the rotor including a rotating shaft, both ends of which are positioned in the housing through bearings, the output shaft head of the rotating shaft extends from the front end of the housing, a waterproof component is provided in the housing, the waterproof component is sealed with the housing and forms a sealed cavity, the circuit board is located in the sealed cavity, the waterproof component has a water leakage channel, the rotating shaft passes through the water leakage channel, and the rear end of the housing is provided with a water leakage through hole connected to the water leakage channel.

[0005] As a preferred solution, the waterproof part includes a water gathering ring and a sleeve, the inner ring of the water gathering ring is connected to the front end of the sleeve, the outer ring of the water gathering ring is sealed to the outer shell, the rear end of the sleeve is sealed to the rear end of the outer shell, the rotating shaft passes through the sleeve, and the inner hole of the sleeve forms a water leakage channel.

[0006] As a further preferred solution, the inner wall of the shell is provided with a positioning step, and the outer ring of the water collecting ring is sealed and connected to the positioning step.

[0007] As a further preferred solution, the water collecting ring extends in the radial direction of the rotating shaft; or, the water collecting ring is a conical ring that guides the incoming water to flow into the water leakage channel.

[0008] As a further preferred solution, the rear end of the housing is provided with a bearing seat for mounting a bearing, the rear end of the sleeve is sealed with the bearing seat, and a water leakage hole is provided in the bearing seat.

[0009] As a preferred solution, the outer periphery of the rotor is provided with a waterproof coating; or the outer periphery of the rotor is provided with a BMC wrapping layer.

[0010] As a preferred solution, the outer periphery of the stator is provided with a waterproof coating; or the outer periphery of the stator is provided with a BMC wrapping layer.

[0011] After adopting the above technical solution, the present invention has the following advantages: first, the waterproof component is sealed and connected to the outer shell to form a sealed cavity, so that the circuit board is sealed and waterproof, and the normal working performance of the circuit board is ensured; second, after the waterproof component is used to form a water leakage channel, water entering the inner shell can be discharged through the water leakage channel, and water will not accumulate inside the outer shell; third, because the rotating shaft passes through the water leakage channel, the water leakage channel is located on the axis of the motor, and will not affect the design and installation of the outer shell, stator and rotor, so it has little impact on the existing structural design of the motor, and there is no need to re-open the mold, thereby avoiding increasing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below in conjunction with the accompanying drawings:

[0013] Figure 1 This is an external schematic diagram of a waterproof motor of the present invention;

[0014] Figure 2 for Figure 1 Cross-sectional view along the AA axis. DETAILED DESCRIPTION

[0015] like Figure 1 and Figure 2 As shown, the present invention provides a waterproof motor, including a housing 1, a rotor 2, a stator 3 and a circuit board 4. The rotor 2 includes a rotating shaft 21. Both ends of the rotating shaft 21 are positioned on the housing 1 through bearings 5. The output shaft head of the rotating shaft 21 extends from the front end of the housing 1. A waterproof component 6 is provided in the housing 1. The waterproof component 6 is sealed with the housing 1 and forms a sealed cavity 100. The circuit board 4 is located in the sealed cavity 100. The waterproof component 6 has a water leakage channel 600. The rotating shaft 21 passes through the water leakage channel 600. The rear end of the housing 1 is provided with a water leakage through hole 101 connected to the water leakage channel 600. First, the waterproof component 6 is sealed and connected to the outer shell 1 to form a sealed cavity 100, so as to achieve sealing and waterproofing of the circuit board 4 and ensure the normal working performance of the circuit board 4; secondly, after the waterproof component 6 is used to form a water leakage channel 600, water entering the inner shell 1 can be discharged through the water leakage channel 600, and water will not accumulate inside the outer shell 1; thirdly, since the rotating shaft 21 passes through the water leakage channel 600, the water leakage channel 600 is located on the axis of the rotating shaft 21, which will not affect the design and installation of the outer shell 1, the stator 3 and the rotor 2, and therefore has little impact on the existing structural design of the motor, and there is no need to re-open the mold, thereby avoiding increasing production costs.

[0016] The waterproof member 6 includes a water-collecting ring 61 and a sleeve 62. The inner ring of the water-collecting ring 61 is connected to the front end of the sleeve 62, the outer ring of the water-collecting ring 61 is sealed to the housing 1, and the rear end of the sleeve 62 is sealed to the rear end of the housing 1. The rotating shaft 21 passes through the sleeve 62, and the inner hole of the sleeve 62 forms a water leakage channel 600. The water-collecting ring 61 can facilitate the collection of water entering the interior of the housing 1 into the water leakage channel 600, making it easier to drain out of the motor.

[0017] To improve the reliability of the waterproof member 6, the inner wall of the housing 1 is provided with a positioning step 11. The outer ring of the water trap 61 cooperates with the positioning step 11 for a sealed connection. The positioning step 11 also facilitates the installation of the sealing structure. Generally, a sealing gasket 611 is provided on the outer ring of the water trap 61 to achieve the seal, but it can also be achieved with sealant, etc.

[0018] To facilitate processing, reduce space occupation, and not affect the installation and fixation of the circuit board 4, the water collecting ring 61 extends radially along the rotating shaft 21. It is understandable that in order to better collect water, the water collecting ring 61 can also be designed as a conical ring that guides the incoming water into the leakage channel 600.

[0019] Since the space inside the housing 1 is limited, in order to make the structure more compact, a bearing seat 12 for mounting the bearing 5 is provided at the rear end of the housing 1. The rear end of the sleeve 62 is sealed to the bearing seat 12 through a sealing gasket 621, and a water leakage hole is provided in the bearing seat 12.

[0020] In this embodiment, to facilitate the processing of the housing 1 and the installation of the stator 2, rotor 3, and circuit board 4, the housing 1 includes a front housing 101 and a rear housing 102. The front housing 101 and rear housing 102 are sealed together, and the waterproof member 6 can be assembled and clamped together using the front housing 101 and rear housing 102. The prior art also includes methods of processing and assembling the housing 1 by dividing it into a left and right half-housing, which the present invention can also refer to.

[0021] To enhance the waterproofing of rotor 2, a waterproof coating is applied to its outer circumference. Alternatively, a BMC coating can be applied to its outer circumference to achieve waterproofing. Similarly, to enhance the waterproofing of stator 3, a waterproof coating is applied to its outer circumference. Alternatively, a BMC coating can be applied to its outer circumference to achieve waterproofing. BMC refers to bulk molding compound.

[0022] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art can make various changes and modifications based on the present invention. As long as they do not depart from the spirit of the present invention, they should all fall within the scope defined in the claims of the present invention.

Claims

1. A waterproof motor, comprising a housing, a rotor, a stator and a circuit board, wherein the rotor comprises a rotating shaft, both ends of which are positioned in the housing through bearings, and an output shaft head of the rotating shaft extends from the front end of the housing, characterized in that: A waterproof component is provided in the shell, which is sealed and connected to the shell to form a sealed cavity. The circuit board is located in the sealed cavity. The waterproof component has a water leakage channel. The rotating shaft passes through the water leakage channel. The rear end of the shell is provided with a water leakage through hole connected to the water leakage channel.

2. The waterproof motor according to claim 1, characterized in that: The waterproof component includes a water gathering ring and a sleeve. The inner ring of the water gathering ring is connected to the front end of the sleeve, the outer ring of the water gathering ring is sealed to the outer shell, the rear end of the sleeve is sealed to the rear end of the outer shell, the rotating shaft passes through the sleeve, and the inner hole of the sleeve forms a water leakage channel.

3. The waterproof motor according to claim 2, characterized in that: The inner wall of the shell is provided with a positioning step, and the outer ring of the water collecting ring is matched with the positioning step and sealedly connected.

4. The waterproof motor according to claim 2, characterized in that: The water collecting ring extends along the radial direction of the rotating shaft; or, the water collecting ring is a conical ring that guides the incoming water to flow into the water leakage channel.

5. The waterproof motor according to claim 2, characterized in that: The rear end of the shell is provided with a bearing seat for mounting the bearing, the rear end of the sleeve is sealedly connected to the bearing seat, and a water leakage hole is provided in the bearing seat.

6. The waterproof motor according to claim 1, characterized in that: The outer periphery of the rotor is provided with a waterproof coating; or the outer periphery of the rotor is provided with a BMC wrapping layer.

7. The waterproof motor according to claim 1, characterized in that: The outer periphery of the stator is provided with a waterproof coating; or the outer periphery of the stator is provided with a BMC wrapping layer.

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