JPH0742220Y2 - Motor pump device - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a novel motor pump device. Specifically, it is intended to provide a novel motor pump device having improved waterproof performance.

[0002]

2. Description of the Related Art FIG. 10 shows a conventional motor pump device a.

The motor-pump device a is a motor-pump device for a pump that supplies cleaning water to a window washer, a headlamp washer, etc. mounted on an automobile.

Reference numeral b denotes a case body that also serves as a motor case, and has a substantially cylindrical motor case portion c with both ends closed.
And a pump case part d connected to one closed end of the motor case part c are integrally formed of synthetic resin.

Reference numeral e denotes a rotary shaft rotatably supported by the motor case portion c so as to be located at the center thereof, and one end e'of the rotary shaft e projects into the pump case portion d.

F is a motor case portion c of the rotating shaft e
An armature fixed to a portion located inside the pump case d of the inside portion, and g is a commutator fixed to a position near the other end of the portion located inside the motor case portion c of the rotating shaft e. And the motor case part c has the armature f
A field magnet h is supported at a position surrounding the commutator g, and a brush i in contact with the commutator g is supported.

An impeller j is arranged in the pump case portion d, and the impeller j is fixed to one end portion e'of the rotary shaft e.

When the rotating shaft e is rotated, the impeller j is rotated so that the fluid flows in from the inflow port k of the pump case portion d and flows out from the outflow port l.

In order for the rotating portion of the armature f and the like to rotate in the motor, the motor case portion c needs to be in communication with the outside. Therefore, the breathing port m is provided at one end portion of the motor case portion c. Has been formed.

[0010]

When the motor pump device is used for a pump that supplies cleaning water to a window washer, a headlamp washer, etc. of an automobile, the motor case is often splashed with water. .

Therefore, if there is a hole in the motor case portion c that communicates with the outside, such as the breathing port m, as in the above-described motor pump device a, when water is splashed, the water is stored in the motor case portion c. However, there is a problem that it may cause an accident such as a short circuit and the occurrence of rust.

[0012]

In order to solve the above-mentioned problems, the motor-pump device of the present invention comprises a motor section in which a required motor element is arranged in a motor case, an inlet and an outlet. A motor-pump device in which an impeller of a pump unit is rotated by a rotary shaft that is formed integrally with a pump unit in which an impeller is arranged in the pump case and projects from the motor unit into the pump case. A power supply section is arranged on the pump section side, and a cord for supplying power to the power supply section is led out from a side surface of the motor case on the pump section side, and the inside and outside of the motor case are connected between the motor section and the pump section. A breathing hole is formed, which is made of a rubber-like elastic material and is formed into a substantially cylindrical shape, and is inserted through at least one of the cord, the inlet and the outlet. The hole is at least the ventilation hole of the waterproof cover which is formed is formed parts is obtained by fitted to cover 7 have state close contact thereto.

[0013]

Therefore, in the motor pump device of the present invention,
Even if vertical water is applied to the motor pump device, the water is extremely hard to enter the motor case because the waterproof cover is fitted on the part where the breathing hole is formed. This has the effect of making it difficult for an accident such as a short circuit due to the intrusion of water into the water. Moreover, since the waterproof cover is not in close contact with the portion where the breathing hole is formed, the function of the breathing hole is not hindered.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the motor pump device of the present invention will be described below with reference to the first embodiment shown in the accompanying drawings.

Reference numeral 2 denotes a motor case, which comprises a substantially cylindrical case body 3 having a closed rear end and an end frame 4 closing an open end of the case body 3. A protrusion 6 protruding rearward is formed on a portion of the rear end of the motor case 3 excluding the peripheral portion of the closing wall 5, and the inside of the protrusion 6 is a recess 6a.

The end frame 4 has a shape in which annular fitting portions 8 and 9 are projected from both front and rear surfaces of a thick disk-shaped main portion 7, and the outer diameters of the fitting portions 8 and 9 are main. It is slightly smaller than that of the portion 7, and therefore, the outer edge portion of the main portion 7 has a small flange-like shape protruding at the center portion of the end frame 4 in the front-rear direction. An insertion hole 10 is formed in the center of the main portion 7.

On the outer peripheral surface of the fitting portion 9 on the rear side of the end frame 4 and on the portion of the rear surface of the main portion 7 located outside the fitting portion 9, a plurality of grooves 11, 11 ,.・
Are formed.

Then, the fitting portion 9 on the rear side of the end frame 4 is fitted inside the opening end portion of the front end of the case body 3, whereby the motor case 2 is formed. .. are formed between the inner surface and front edge of the front end portion of the case body 3 and the grooves 11, 11, ... Of the end frame 4 so as to communicate the inside and outside of the motor case 2. It

A rotary shaft 13 is rotatably arranged in the motor case 2. A front end portion 13 'of the rotary shaft is inserted into the through hole 10 of the end frame 4 and projects forward. 1
Reference numerals 4 and 14 denote bearings arranged in the recess 6a of the case body 3 and in the insertion hole 10 of the end frame 4, and the rotary shaft 13 is rotatably supported by the bearings 14 and 14.

Reference numeral 15 is an armature fixed to the rotary shaft 13 in the motor case 2, and 16 and 16 are armatures 1.
5, a field magnet supported on the inner surface of the case body 3 so as to surround 5, a commutator fixed to the rotating shaft 13 at a position near the front end in the motor case 2, and 18 and 18 on the rear side of the end frame 4. The brush is arranged in the fitting portion 9 and is in contact with the commutator 17.

Reference numeral 19 is a power supply cord that is drawn out to the side through the front end of the case body 3 and is connected to the brushes 18, 18. The portion of the cord 19 pulled out from the case body 3 is waterproofed by a known integral structure (not shown).

A pump case 20 is composed of the end frame 4 and the case body 21.

The case body 21 has a cylindrical main portion 22 having a closed front end, an inlet 23 projecting forward from the center of the front end wall of the main portion 22, and a side wall of the main portion 22 from the side wall. And an outlet 24 protruding in a direction parallel to the substantially tangential direction of the.

The rear end of the main portion 22 is fitted onto the front fitting portion 8 of the end frame 4 so that the pump case 2
0 is formed.

An impeller 25 is rotatably housed in the internal space of the pump case 20, and the impeller 25 is fixed to the front end portion 13 'of the rotary shaft 13. Therefore, when the rotary shaft 13 rotates, the impeller 25
Is rotated in a predetermined direction, and the impeller 25 is rotated in a predetermined direction, so that fluid flows from the inlet 23 into the pump case 20, and then flows out through the outlet 24.

Incidentally, 26 is the pump case 20 in the first half thereof.
Of the pump case 20. The rear half of the case body 21 is fitted in the fitting portion 8 on the front side of the end frame 4.
It is a packing for waterproofing between the motor case 2 and the motor case 2, and the rotary shaft 13 of the motor is inserted into a center hole 26 a of the packing 26.

Reference numeral 27 is a waterproof cover made of a rubber-like elastic material, and has a substantially cylindrical main portion 28 and the main portion 28.
The close contact portion 29 connected to the rear end and the tongue piece 30 protruding from the front end of the main portion 28 are integrally formed.

As described above, the main portion 28 has a cylindrical shape, and the inner diameter thereof is the same as or slightly smaller than the outer diameter of the main portion 7 of the end frame 4, and they are located on the opposite sides of each other. Projected portions 31 and 31 that extend in the axial direction and become grooves when viewed from the inside are formed in the portion, and the insertion hole 32 and the cord 1 through which the outlet 24 is inserted in the portion near the front end of the peripheral wall.
An insertion hole 33 for inserting 9 is formed.

The close contact portion 29 has a wide annular shape, and is formed so that its diameter becomes smaller toward the rear end.
The inner diameter of the rear end is made smaller than the outer diameter of the case body 3 of the motor case 2. Further, annular ribs 34, 34 are provided on the inner surface of the close contact portion 29 so as to project.

The tongue piece 30 has a strip shape, and an insertion hole 35 for inserting the inlet 23 is formed at the front end portion thereof.

The waterproof cover 27 is fitted on the front end of the motor case 2 and the pump case 20. Then, at this time, the base portion of the inlet 23 is inserted into the insertion hole of the tongue piece 30, and the outlet 2 is inserted into the insertion hole 32 of the main portion 28.
4, the base of the cord 19 in the insertion hole 33,
Each is inserted.

The waterproof cover 27 is attached as described above.

Then, the breathing hole 12 of the motor case 2,
Since the water-proof cover 27 covers the places where 12, ... Are formed, there is no possibility that the water will enter the motor case 2 when it is splashed with water. Since the waterproof cover 27 is not in close contact with the outer surface of the motor case 2,
Breathing through the breathing holes 12, 12, ... Is not disturbed at all.

[0034] And again, if the cover 2 gets wet with water,
Even if water enters between the motor case 7 and the motor case 2, the water is drained through the groove inside the protrusion 31.

FIG. 9 shows an example in which a modified example 27A of the waterproof cover is used.
The cord 19 does not have an insertion hole for inserting the
It is designed to be pulled out to the outside of the waterproof cover 27A through the inside of 1.

[0036]

As is apparent from the above description, the motor-pump device of the present invention is provided in a pump case having a motor section, in which a required motor element is disposed in a motor case, an inlet and an outlet. A motor-pump device in which an impeller of a pump unit is rotated by a rotary shaft that is formed integrally with a pump unit in which an impeller is arranged and protrudes from a motor unit into a pump case, and is provided on the pump unit side of the motor case. A power supply section is arranged and a cord for supplying power to the power supply section is led out from a side surface of the motor case on the pump section side, and a breathing hole for communicating the inside and the outside of the motor case is provided between the motor section and the pump section. Is formed of a rubber-like elastic material into a substantially cylindrical shape, and an insertion hole for inserting at least one of the cord, the inlet and the outlet is formed. Characterized in that a waterproof cover fitted to cover with no close contact thereto at least the breathing hole is formed partially.

Therefore, in the motor pump device of the present invention, even if the motor pump device is exposed to vertical water, since the waterproof cover is fitted on the portion where the breathing hole is formed, The water is extremely unlikely to enter the motor case, and an accident such as a short circuit due to the water entering the motor case is unlikely to occur. Moreover, since the waterproof cover is not in close contact with the portion where the breathing hole is formed, the function of the breathing hole is not hindered.

The specific shapes and structures shown in the above embodiments are merely examples for embodying the present invention, and the technical scope of the present invention is limitedly interpreted by these. Not something that is done.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an example of an embodiment of a pump motor device of the present invention.

FIG. 2 is a perspective view.

FIG. 3 is a side view.

FIG. 4 is a sectional view taken along line VI-VI in FIG.

FIG. 5 is a front view with a part cut away.

FIG. 6 is a perspective view showing an exploded main part.

FIG. 7 is a perspective view of a waterproof cover.

FIG. 8 is a vertical sectional view of a waterproof cover.

FIG. 9 is a perspective view showing a modified example of the waterproof cover.

FIG. 10 is a vertical cross-sectional view showing an example of a conventional pump motor device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor pump device 2 Motor case 12 Breathing hole 13 Rotating shaft 18 Power supply part 19 Code 20 Pump case 23 Inlet 24 Outlet 25 Impeller 27 Waterproof cover 32, 33, 35 Insertion hole 27A Waterproof cover

Claims (1)

[Scope of utility model registration request] 1. A motor part integrally formed with a motor part in which a desired motor element is arranged in a motor case and a pump part in which an impeller is arranged in a pump case having an inlet and an outlet. A motor-pump device in which an impeller of a pump unit is rotated by a rotating shaft projecting from the inside into a pump case, wherein a power supply unit is disposed on the pump unit side of the motor case, and a cord for supplying power to the power supply unit is a motor. A breathing hole is formed from the side surface of the case on the side of the pump section, and a breathing hole is formed between the motor section and the pump section for communicating the inside and the outside of the motor case. , A waterproof cover having an insertion hole through which at least one of the inlet and the outlet is formed, and at least the portion where the breathing hole is formed is not adhered to the waterproof cover. A motor pump device, which is fitted so as to cover it in a closed state.