JP2021061670A - Mechanical and electrical integrated type motor - Google Patents

Abstract

To provide a mechanical and electrical integrated type motor in which an opening for ventilation is provided in a waterproof cover for protecting a circuit board, capable of suppressing direct contact of high pressure water entering from the opening with a waterproof filter in the opening.SOLUTION: A mechanical and electrical integrated type motor includes a circuit board provided outside a housing of a motor and a waterproof cover mounted on the housing so as to cover the circuit board. In a cover, a hollow projecting section (24) projecting with a step at an opposite side of the housing is provided at an opposing portion to the housing. A waterproof filter (30) is provided on a surface facing the housing so as to close an internal space of the projecting section. In addition, an opening (26) for ventilation is provided in a side wall portion forming the step at the projecting section. A tongue (28) is provided at the opening to prevent high pressure water entering from the opening from coming into direct contact with the waterproof filter through the internal space.SELECTED DRAWING: Figure 4

Description

The present disclosure relates to a mechanical / electrical integrated motor in which a circuit board for driving a motor is provided on the outside of a motor housing.

In the mechanical / electrical integrated motor, a waterproof cover is attached to the housing of the motor so as to cover the circuit board from the outside of the housing.
Further, in this type of cover, as described in Patent Document 1, it has been proposed to provide an opening serving as a ventilation hole and to provide a waterproof filter in the opening.

Further, in Patent Document 1, the cover is provided with a circular embossed groove protruding outward, and an opening is provided on the side wall of the embossed groove. Therefore, when the housing is covered with water, the opening is covered with water. It has also been proposed to prevent it from being blocked.

JP-A-2007-189215

However, as a result of detailed examination by the inventor, high-pressure water may be applied to the motor with integrated mechanical and electrical equipment for cleaning. Therefore, as in the above proposal, simply providing an opening in the cover will produce high-pressure water. The problem was found that it could hit the waterproof filter directly.

That is, since the mechanical / electrical integrated motor may be attached to a part that is easily soiled, such as an automobile engine, it may be washed with high pressure water. In this case, depending on the direction of the high-pressure water, it is conceivable that the high-pressure water invades from the opening and directly hits the waterproof filter, causing the waterproof filter to peel off or be damaged.

One aspect of the present disclosure is that in a mechanical / electrical integrated motor in which a waterproof cover for protecting a circuit board is provided with an opening for ventilation, high-pressure water that has entered through the opening directly hits the waterproof filter in the opening. It is desirable to suppress.

The electromechanical and electrical integrated motor according to one aspect of the present disclosure covers the housing (4) containing the motor inside, the circuit board (10) provided on the outside of the housing, and the circuit board from the outside of the housing. A waterproof cover (20) attached to the housing as described above is provided. A circuit component for driving the motor is mounted on the circuit board.

Then, in the cover, a hollow protrusion (24) is provided on the portion facing the housing with a step on the opposite side to the housing, and the protrusion is provided on the surface facing the housing. A waterproof filter (30) for breathing is provided so as to block the internal space of the.

Further, in the protrusion, an opening (26) is provided in the side wall portion forming the step, and the high-pressure water that has entered through the opening passes through the internal space of the protrusion to form a waterproof filter. A tongue-shaped body (28) is provided to prevent direct contact.

Therefore, according to the electromechanical-integrated motor of the present disclosure, even if high-pressure water is radiated toward the opening during high-pressure washing of the electromechanical-integrated motor, the high-pressure water hits the tongue-shaped body provided in the opening. , It will be prevented from hitting the waterproof filter directly.

Therefore, the high-pressure water that has entered through the opening does not directly hit the waterproof filter through the internal space of the protrusion, and it is possible to prevent the waterproof filter from peeling off or being damaged.

It is a top view which looked at the motor | integrated type motor of 1st Embodiment from the rear. It is a top view which shows the state which attached the cover to the mechanical / electrical integrated motor shown in FIG. FIG. 3 is a sectional view taken along line III-III of the cover shown in FIG. It is sectional drawing which shows the opening and the tongue-like body provided in the protrusion shown in FIG. It is sectional drawing which shows the deformation example of the opening and the tongue-like body provided in the protrusion. It is a top view which looked at the motor of the 2nd Embodiment from the rear. FIG. 6 is a sectional view taken along line VII-VII of the cover shown in FIG.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.
[First Embodiment]
As shown in FIG. 1, in the electromechanical and electrical integrated motor 2 of the present embodiment, a circuit board 10 on which a circuit component for driving a motor is mounted is fixed to an outer wall of a housing 4 in which the motor is housed. .. In the housing 4, the portion to which the circuit board 10 is fixed is a base portion that rotatably supports the rotation shaft of the motor in the housing 4, and is made of, for example, an aluminum die cast.

In the circuit board 10, the coil 12 and the capacitor 14 that form a part of the drive circuit of the motor are mounted on the substrate surface on the opposite side of the housing 4, and the motor is mounted on the substrate surface on the housing 4 side. A switching element or the like for switching the energization path of the above is mounted. Further, the circuit board 10 is also fixed with a connector 16 for connecting an external DC power supply and a control device, and a terminal block 18 for connecting the drive circuit and the motor in the housing 4.

Then, as shown in FIG. 2, a waterproof cover 20 that covers the circuit board 10 from the outside and protects the inside of the housing 4 including the circuit board 10 is fixed to the housing 4. When the cover 20 is attached to the housing 4, a packing that is sandwiched between the cover 20 and the cover 20 to prevent water from entering is provided on the outer periphery of the cover 20.

The cover 20 is made of a metal plate, and a raised portion 22 is provided on a portion facing the circuit board 10 so as to be opposite to the housing 4. The raised portion 22 is for preventing interference, which prevents the cover 20 from coming into contact with electronic components such as the coil 12 and the capacitor 14 mounted on the circuit board 10 when the cover 20 is fixed to the housing 4. As shown in FIG. 3, the cover 20 is higher than the plate surface by a predetermined height h1.

Further, the cover 20 is also provided with a hollow protrusion 24 which is different from the raised portion 22 and has a step on the plate surface of the cover 20 and protrudes to the opposite side of the housing 4. .. The height h2 of the protrusion 24 from the plate surface of the cover 20 is lower than the height h1 of the raised portion 22. The raised portion 22 and the protruding portion 24 are integrally provided on the cover 20, for example, by press molding a metal plate.

Further, in the protrusion 24, an opening 26 for ventilation is provided as a so-called ventilation hole in the side wall portion forming a step with respect to the plate surface of the cover 20. A waterproof filter 30 for breathing is attached to the plate surface of the cover 20 on the housing 4 side so as to close the internal space of the protrusion 24.

As shown in FIG. 2, the protrusion 24 is circular, and the openings 26 are provided at three locations where the outer periphery of the protrusion 24 is divided into three at substantially equal intervals.
Further, as shown in FIG. 4, each opening 26 has a tongue-shaped body 28 that prevents high-pressure water that has entered from the opening 26 from directly hitting the waterproof filter 30 through the internal space of the protrusion 24. It is provided.

The tongue-shaped body 28 is integrally formed with the opening 26 of the protrusion 24 by bending, and in the present embodiment, the housing 4 side end on the inner circumference of the opening 26, in other words, the cover. It is bent toward the internal space of the protrusion 24 from the position closest to the plate surface of 20.

Further, the tongue-shaped body 28 is bent so that the tip portion P1 farthest from the connecting portion of the cover 20 with the opening 26 exceeds the straight line L1 shown by the dotted line in FIG.
That is, the straight line L1 ends at the end position P2 facing the bent position of the tongue-shaped body 28 on the inner circumference of the opening 26 and the end edge of the protrusion 24 on the housing 4 side in the internal space of the protrusion 24. It is a diagonal line connecting the portion position P2 with the farthest edge position P3.

If the tip portion P1 of the tongue-shaped body 28 does not exceed this straight line L1, the high-pressure water that has entered from the opening 26 passes through the internal space of the protrusion 24 and directly hits the waterproof filter 30 to hit the waterproof filter 30. May come off or be damaged.

Therefore, in the present embodiment, by bending the tip portion P1 of the tongue-shaped body 28 so as to exceed the straight line L1, even if high-pressure water invades from the opening 26, the high-pressure water hits the tongue-shaped body 28 and is dispersed. , High-pressure water is prevented from directly hitting the waterproof filter 30.

Therefore, according to the mechanical / electrical integrated motor 2 of the present embodiment, even if the high-pressure water is radiated toward the opening 26 at the time of high-pressure washing or the like, the tongue-shaped body 28 reduces the momentum of the high-pressure water and the high-pressure water. Can be prevented from directly hitting the waterproof filter 30. Therefore, it is possible to prevent the waterproof filter 30 from being peeled off or damaged by high-pressure water.

Further, since the openings 26 are provided at three locations around the protrusions 24 at substantially equal intervals, even if water whose momentum has been reduced by the tongue-shaped body 28 enters the internal space of the protrusions 24. , The water will be drained from the downward opening 26.

Therefore, according to the present embodiment, it is possible to suppress the accumulation of water in the protrusion 24, and further, it is possible to prevent the waterproof filter 30 from being blocked by the water accumulated in the protrusion 24 and being unable to ventilate. it can.

Further, since the height h2 of the protrusion 24 from the plate surface of the cover 20 is lower than the height h1 of the raised portion 22, the protrusion 24 is provided on the cover 20 to provide the mechanical / electrical integrated motor 2. It is possible to prevent the outer dimension of the rotation axis direction from becoming large. Therefore, this configuration is particularly effective in a mechanical / electrical integrated motor that requires miniaturization.

[Modification example]
In the first embodiment, the tongue-shaped body 28 formed by bending each opening 26 of the protrusion 24 is directed from the end of the inner circumference of the opening 26 on the housing 4 side toward the inside of the protrusion 24. It was explained as being folded.

However, as shown in FIG. 5, the tongue-shaped body 28 has a protrusion from the end of the inner circumference of the opening 26 opposite to the housing 4, in other words, from the position farthest from the plate surface of the cover 20. It may be bent toward the outside of 24.

In this case, if the tip portion P1 of the tongue-shaped body 28 is bent so as to exceed the straight line L2 shown by the dotted line in FIG. 4, the high-pressure water radiated toward the opening 26 hits the tongue-shaped body 28 and is dispersed. Will be done. Therefore, even in this modification, the waterproof filter 30 can be prevented from being peeled off or damaged by high-pressure water.

That is, the straight line L2 is the end position P4 facing the bent position of the tongue-shaped body 28 on the inner circumference of the opening 26, and the end farthest from the end position P4 at the housing 4 side opening end edge of the protrusion 24. It is a straight line connecting the edge position P3.

Then, if the tip portion P1 of the tongue-shaped body 28 does not exceed the straight line L2 on the outside of the protrusion 24, the high-pressure water directly hits the waterproof filter 30 from the opening 26 through the internal space of the protrusion 24. Can be considered.

However, even in this modification, if the tip portion P1 of the tongue-shaped body 28 is bent so as to exceed the straight line L2, the high-pressure water radiated toward the opening 26 will hit the tongue-shaped body 28 and be dispersed. Therefore, it is possible to prevent the high-pressure water from directly hitting the waterproof filter 30.

[Second Embodiment]
Next, in the first embodiment and the modified example, the protrusion 24 is described as having a hollow internal space by being projected by press molding with a step on the plate surface of the cover 20.

On the other hand, in the present embodiment, as shown in FIGS. 6 and 7, in the protrusion 24, a part of the ceiling portion away from the housing 4, specifically the central part of the circle, is depressed toward the housing 4. By doing so, a circular recess 25 is provided. As a result, the internal space of the protrusion 24 is formed in an annular shape around the recess 25. The recess 25 is integrally formed when the protrusion 24 is press-molded.

Further, as shown in FIG. 7, the depth of the recess 25 is set so that the end surface of the recess 25 on the housing 4 side is aligned with the plate surface of the cover 20 on the housing 4 side. As a result, when the waterproof filter 30 is attached to the plate surface of the cover 20 on the housing 4 side, it is also attached to the end surface of the recess 25 on the housing 4 side, and the annular internal space in the protrusion 24 is closed. Will come to do.

In the protrusion 24 of the present embodiment configured as described above, the position of the protrusion 24 facing the opening 26 on the housing 4 side opening edge is not the edge position P1 of the first embodiment. It is the outer peripheral edge P5 of the recess 25 on the housing 4 side.

Therefore, if the tip portion P1 of the tongue-shaped body 28 exceeds the straight line L3 connecting the end position P2 of the opening 26 and the outer peripheral edge P5 of the recess 25, the tongue-shaped body 28 invades from the opening 26. It is possible to prevent the high-pressure water from directly hitting the waterproof filter 30.

Since the inclination angle θ of the straight line L3 with respect to the plate surface of the cover 20 on the housing 4 side is larger than the inclination angle of the straight line L1 of the first embodiment, the tongue-shaped body 28 is made to exceed the straight line L3. The degree of freedom in the shape of the tongue-shaped body 28 during bending can be increased.

[Other Embodiments]
Although the embodiments of the present disclosure have been described above, the present disclosure is not limited to the above-described embodiments, and can be implemented in various modifications.

For example, in the above embodiment, the shape of the protrusion 24 has been described as being circular, but the protrusion 24 does not necessarily have to be circular, and may be a desired shape such as a triangle or a quadrangle. ..

Further, the opening 26 may be provided at four or more places instead of three places around the protrusion 24. That is, a plurality of openings 26 serving as ventilation holes may be provided according to the shape of the outer circumference of the protrusion 24, and may be provided at a plurality of locations for dividing the outer circumference of the protrusion 24 into three or more.

Further, a plurality of functions possessed by one component in the above embodiment may be realized by a plurality of components, or one function possessed by one component may be realized by a plurality of components. Further, a plurality of functions possessed by the plurality of components may be realized by one component, or one function realized by the plurality of components may be realized by one component. Further, a part of the configuration of the above embodiment may be omitted. In addition, at least a part of the configuration of the above embodiment may be added or replaced with the configuration of the other above embodiment.

2 ... Mechanical and electrical integrated motor, 4 ... Housing, 10 ... Circuit board, 20 ... Cover, 22 ... Ridge, 24 ... Protrusion, 26 ... Opening, 28 ... Tongue, 30 ... Waterproof filter.

Claims (7)

The housing (4) that houses the motor inside and
A circuit board (10) provided on the outside of the housing and on which circuit components for driving a motor are mounted, and
A waterproof cover (20) attached to the housing so as to cover the circuit board from the outside of the housing.
A hollow protrusion (24) protruding from the cover facing the housing with a step on the side opposite to the housing.
A waterproof filter (30) for breathing, which is provided on the surface of the cover facing the housing so as to close the internal space of the protrusion.
An opening (26) provided in a side wall portion forming the step in the protrusion, and
The opening is provided with a tongue-shaped body (28) that prevents high-pressure water that has entered through the opening from directly hitting the waterproof filter through the internal space. .. The electromechanical and electrical integrated motor according to claim 1.
The tongue-shaped body is a mechanical / electrical integrated motor that is bent toward the inside of the protrusion from the housing-side end on the inner circumference of the opening. The electromechanical and electrical integrated motor according to claim 1.
The tongue-shaped body is a mechanical / electrical integrated motor that is bent toward the outside of the protrusion from the end of the inner circumference of the opening opposite to the housing. The motor and electrical integrated motor according to any one of claims 1 to 3.
The mechanical / electrical integrated motor is provided at a plurality of locations where the outer periphery of the side wall portion forming the step in the protrusion is divided into three or more. The motor and electrical integrated motor according to any one of claims 1 to 4.
The cover is provided with a raised portion (22) for preventing interference, which is raised on the opposite side of the housing so as not to hit the electronic components mounted on the circuit board. An electromechanical and electrical integrated motor in which the height of the cover from the plate surface is lower than that of the raised portion. The motor and electrical integrated motor according to any one of claims 1 to 5.
In the protrusion, the tip portion (P1) of the tongue-shaped body farthest from the opening is at the end position (P2, P4) facing the bent position of the tongue-shaped body on the inner circumference of the opening. And the electric motor, which is arranged so as to cross a straight line (L1, L2, L3) connecting the protruding portion with the edge position (P3, P5) farthest from the end position at the opening edge on the housing side. Integrated motor. The electromechanical and electrical integrated motor according to claim 5.
A mechanical / electrical integrated motor in which a part of the ceiling portion of the protrusion, which is separated from the housing, is recessed toward the housing.

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