CN110971056A

CN110971056A - Waterproof motor

Info

Publication number: CN110971056A
Application number: CN201811124375.3A
Authority: CN
Inventors: 肖伟; 方梁; 陈嘉轩; 张雷
Original assignee: Panasonic Motor Hangzhou Co Ltd
Current assignee: Panasonic Motor Hangzhou Co Ltd
Priority date: 2018-09-26
Filing date: 2018-09-26
Publication date: 2020-04-07

Abstract

The invention discloses a waterproof motor, which belongs to the field of motors and solves the problem of increased production cost caused by a waterproof structure of a circuit board in the prior art. The invention is mainly used for reducing the influence of the waterproof structure on the motor structure and avoiding increasing the production cost.

Description

Waterproof motor

Technical Field

The invention relates to a motor, in particular to a waterproof motor.

Background

The existing motor comprises a shell, a rotor, a stator and a circuit board, wherein the rotor comprises a rotating shaft, two ends of the rotating shaft are positioned on the shell through bearings, an output shaft head of the rotating shaft extends out of the front end of the shell, and waterproof sealing treatment needs to be carried out on the circuit board for normal work of the circuit board. In the prior art, a plurality of patent documents are that a sealed cavity is arranged on the inner side or the outer side of a shell to ensure that a circuit board is in a waterproof and sealed environment, but the sealed cavities are mostly offset relative to a rotating shaft, a new mold needs to be redesigned to mold the shell into a specific structure, and the production cost is increased for enterprises.

Disclosure of Invention

The invention aims to provide a waterproof motor, which reduces the influence of a waterproof structure on the motor structure and avoids increasing the production cost.

In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a waterproof motor, includes shell, rotor, stator and circuit board, and the rotor includes the pivot, and the both ends of pivot are passed through the bearing and are positioned in the shell, and the output spindle nose of pivot stretches out from the front end of shell, is equipped with waterproof spare in the shell, and waterproof spare and shell sealing connection enclose into sealed chamber, and the circuit board is located sealed intracavity, and waterproof spare has the water leakage passage, and the pivot passes from the water leakage passage, and the rear end of shell is equipped with the water leakage hole who communicates with the water leakage passage.

Preferably, the waterproof part comprises a water collecting ring and a sleeve, an inner ring of the water collecting ring is connected with the front end of the sleeve, an outer ring of the water collecting ring is connected with the shell in a sealing mode, the rear end of the sleeve is connected with the rear end of the shell in a sealing mode, the rotating shaft penetrates through the sleeve, and an inner hole of the sleeve forms a water leakage channel.

As a further preferred scheme, the inner wall of the shell is provided with a positioning step, and the outer ring of the water collecting ring is in matched sealing connection with the positioning step.

As a further preferable mode, the water collecting ring extends along the radial direction of the rotating shaft; or, the water gathering ring is a conical ring for guiding the inflow water to flow into the water leakage channel.

As a further preferred scheme, a bearing seat for mounting a bearing is arranged at the rear end of the shell, the rear end of the sleeve is hermetically connected with the bearing seat, and the water leakage hole is formed in the bearing seat.

Preferably, the periphery of the rotor is provided with a waterproof coating; or a BMC wrapping layer is arranged on the periphery of the rotor.

Preferably, the periphery of the stator is provided with a waterproof coating; or a BMC wrapping layer is arranged on the periphery of the stator.

After the technical scheme is adopted, the invention has the following advantages: firstly, the waterproof part is connected with the shell in a sealing way to form a sealing cavity, so that the circuit board is sealed and waterproof, and the normal working performance of the circuit board is ensured; secondly, after a water leakage channel is formed by the waterproof part, water can be drained through the water leakage channel after entering the shell, and water cannot accumulate in the shell; thirdly, because the rotating shaft passes through the water leakage channel which is positioned on the axis of the motor, the design and the installation of the shell, the stator and the rotor can not be influenced, the existing structural design of the motor is not influenced, the mold opening is not required to be performed again, and the increase of the production cost is avoided.

Drawings

The invention will be further described with reference to the accompanying drawings in which:

FIG. 1 is an external schematic view of a waterproof motor of the present invention;

fig. 2 is a sectional view taken along the line a-a in fig. 1.

Detailed Description

As shown in fig. 1 and 2, the present invention provides a waterproof motor, which includes a housing 1, a rotor 2, a stator 3 and a circuit board 4, wherein the rotor 2 includes a rotating shaft 21, two ends of the rotating shaft 21 are positioned in the housing 1 through bearings 5, an output shaft head of the rotating shaft 21 extends out from a front end of the housing 1, a waterproof member 6 is arranged in the housing 1, the waterproof member 6 is hermetically connected with the housing 1 and encloses a sealed cavity 100, the circuit board 4 is positioned in the sealed cavity 100, the waterproof member 6 has a water leakage channel 600, the rotating shaft 21 passes through the water leakage channel 600, and a water leakage through hole 101 communicated with the water leakage channel 600 is arranged at a rear end of the housing 1. Firstly, the waterproof part 6 is hermetically connected with the shell 1 to form a sealed cavity 100, so that the circuit board 4 is sealed and waterproof, and the normal working performance of the circuit board 4 is ensured; secondly, after the water leakage channel 600 is formed by the waterproof part 6, water can be discharged through the water leakage channel 600 after entering the shell 1, and water cannot accumulate in the shell 1; thirdly, since the rotating shaft 21 passes through the water leakage passage 600, the water leakage passage 600 is located on the axis of the rotating shaft 21, and the design and installation of the housing 1, the stator 3 and the rotor 2 are not affected, so that the existing structural design of the motor is not affected, the mold opening is not required again, and the increase of the production cost is avoided.

The waterproof part 6 comprises a water collecting ring 61 and a sleeve 62, wherein the inner ring of the water collecting ring 61 is connected with the front end of the sleeve 62, the outer ring of the water collecting ring 61 is connected with the shell 1 in a sealing mode, the rear end of the sleeve 62 is connected with the rear end of the shell 1 in a sealing mode, the rotating shaft 21 penetrates 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 water entering the inside of the housing 1 to be collected in the water leakage passage 600, and can be discharged out of the motor more easily.

In order to improve the fixing reliability of the waterproof part 6, the inner wall of the shell 1 is provided with a positioning step 11, and the outer ring of the water collecting ring 61 is matched and hermetically connected with the positioning step 11. The positioning step 11 is also beneficial to the installation of the sealing structure, generally, a sealing gasket 611 is arranged on the outer ring of the water trap ring 61 to realize sealing, and the sealing can also be realized by a sealing glue, and the like.

In order to facilitate the processing and reduce the occupied space without affecting the installation and fixation of the circuit board 4, the water collecting ring 61 extends along the radial direction of the rotating shaft 21. It can be understood that the water collecting ring 61 can be designed as a conical ring for guiding the inlet water to flow into the water leakage path 600 for better water collecting effect.

Because the space inside the housing 1 is limited, in order to make the structure more compact, the rear end of the housing 1 is provided with a bearing seat 12 for mounting the bearing 5, the rear end of the sleeve 62 is hermetically connected with the bearing seat 12 through a sealing gasket 621, and a water leakage hole is formed in the bearing seat 12.

In the present embodiment, in order to facilitate the processing of the housing 1 and the mounting of the stator 2, the rotor 3 and the circuit board 4, the housing 1 includes a front case 101 and a rear case 102, the front case 101 and the rear case 102 are hermetically connected, and the clamping waterproof member 6 may be assembled using the front case 101 and the rear case 102. The prior art also has the structure that the shell 1 is divided into a left half shell and a right half shell for processing and assembling, and the invention can also be used for reference.

In order to improve the waterproof effect of the rotor 2, the periphery of the rotor 2 is provided with a waterproof coating, and in addition, the periphery of the rotor 2 can also be provided with a BMC (bulk molding compound) wrapping layer to realize the waterproof effect. For the same reason, in order to improve the waterproof effect of the stator 3, the periphery of the stator 3 is provided with a waterproof coating; alternatively, a BMC coating layer may be provided on the outer periphery of the stator 3. BMC refers to bulk molding compounds.

Other embodiments of the present invention than the preferred embodiments described above, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, should fall within the scope of the present invention defined in the claims.

Claims

1. The utility model provides a waterproof motor, includes shell, rotor, stator and circuit board, and the rotor includes the pivot, and the both ends of pivot are passed through the bearing and are positioned in the shell, and the output spindle nose of pivot stretches out from the front end of shell, its characterized in that, be equipped with waterproof piece in the shell, waterproof piece and shell sealing connection enclose into sealed chamber, and the circuit board is located sealed intracavity, and waterproof piece has the passageway that leaks, and the pivot passes from the passageway that leaks, and the rear end of shell is equipped with the through-hole that leaks with the passageway intercommunication that leaks.

2. The waterproof motor of claim 1, wherein the waterproof member comprises a water collecting ring and a sleeve, an inner ring of the water collecting ring is connected with a front end of the sleeve, an outer ring of the water collecting ring is connected with the housing in a sealing manner, a rear end of the sleeve is connected with a rear end of the housing in a sealing manner, the rotating shaft passes through the sleeve, and an inner hole of the sleeve forms a water leakage channel.

3. The waterproof motor according to claim 2, wherein the inner wall of the housing is provided with a positioning step, and the outer ring of the water collecting ring is in fit sealing connection with the positioning step.

4. The waterproof motor according to claim 2, wherein the water collecting ring extends in a radial direction of the rotating shaft; or, the water gathering ring is a conical ring for guiding the inflow water to flow into the water leakage channel.

5. The waterproof motor according to claim 2, wherein a bearing seat for mounting the bearing is provided at the rear end of the housing, the rear end of the sleeve is hermetically connected to the bearing seat, and the water leakage hole is provided in the bearing seat.

6. The waterproof motor according to claim 1, wherein the rotor is provided at its outer periphery with a waterproof coating; or a BMC wrapping layer is arranged on the periphery of the rotor.

7. The waterproof motor according to claim 1, wherein the stator is provided with a waterproof coating on an outer periphery thereof; or a BMC wrapping layer is arranged on the periphery of the stator.