JPH0560162U - Motor pump device - Google Patents

Abstract

(57) [Summary] [Purpose] To improve waterproof performance. [Structure] A motor section in which a required motor element is arranged in a motor case 2, an inlet 23 and an outlet 2
And a pump section in which an impeller 25 is disposed in a pump case 20 including the motor 4 and the impeller of the pump section are rotated by a rotary shaft 13 protruding from the motor section into the pump case. In the device 1, the power supply parts 18, 18 are arranged on the pump part side of the motor case, and the cord 19 for supplying power to the power supply part is led out from the side surface of the motor case on the pump part side. A breathing hole 12 for communicating the inside and the outside of the motor case is formed between the portion and the motor case, is formed of a rubber-like elastic material in a substantially cylindrical shape, and the insertion holes 32, 33, 35 through which the cord, the inlet and the outlet are inserted. The waterproof cover 27 formed with was fitted outside so as to cover at least the portion where the breathing hole was formed without being in close contact therewith.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a novel motor pump device. Specifically, it is intended to provide a new motor pump device with improved waterproof performance.

[0002]

[Prior 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, and the like mounted on an automobile.

Reference numeral b denotes a case body that also serves as a motor case, and includes a substantially cylindrical motor case portion c with both ends closed and a pump case portion d connected to one closed end of the motor case portion c. It is 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 an armature fixed to a portion of the rotary shaft e located in the motor case portion c, which is located closer to the pump case d, and g is also in the motor casing portion c of the rotary shaft e. The commutator is fixed to a position near the other end of the positioned portion, and in the motor case portion c, a field magnet h is provided at a position surrounding the armature f, and a brush i in contact with the commutator g is provided. It 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 rotating shaft e 1.

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 part of the armature f or the like to rotate in the motor, the motor case part c needs to be in communication with the outside. Therefore, the breathing port m is provided at one end of the motor case part c. Has been formed.

[0010]

[Problems to be solved by the device]

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

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. There is a problem that it may get in and cause an accident such as a short circuit or the occurrence of rust.

[0012]

[Means for Solving the Problems]

 Therefore, in order to solve the above-mentioned problems, the motor-pump device of the present invention has an impeller arranged in a pump case having a motor section in which a required motor element is arranged in the motor case, an inlet and an outlet. A pump unit in which the impeller of the pump unit is rotated by a rotating shaft protruding from the motor unit into the pump case, and the power supply unit is provided on the pump unit side of the motor case. And a cord for supplying power to the power supply part is led out from the side surface of the motor case on the pump part side, and a breathing hole is formed between the motor part and the pump part for communicating the inside and the outside of the motor case. , A waterproof cover formed of a rubber-like elastic material into a substantially cylindrical shape and having an insertion hole for inserting at least one of the cord, the inlet and the outlet. Over the one in which externally fitted to at least the cover breathing hole is formed partially in contact with a 7 have state there.

[0013]

[Action]

 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, It is extremely difficult to enter into the motor case, and it is possible to prevent an accident such as a short circuit due to the entry of water into the motor case. 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]

【Example】

 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 includes 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 in 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 project 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 smaller than that of the portion 7, and therefore, the outer edge portion of the main portion 7 has a small flange-like shape projecting in the center portion of the end frame 4 in the front-back 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, ...・ Is formed.

Then, the fitting portion 9 on the rear side of the end frame 4 is fitted into the opening end portion of the front end of the case body 3, whereby the motor case 2 is formed. Then, 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, there are breathing holes 12, 12, ... It is formed.

Reference numeral 13 denotes a rotary shaft that is rotatably arranged in the motor case 2. A front end portion 13 ′ of the rotary shaft is inserted into the insertion hole 10 of the end frame 4 and protrudes forward. Reference numerals 14 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 16, 16 and 16 are field magnets supported on the inner surface of the case body 3 so as to surround the armature 15, and 17 is a motor. A commutator fixed to the rotary shaft 13 at a position near the front end in the case 2, 18 and 18 are brushes arranged in the fitting portion 9 on the rear side of the end frame 4 and contacting the commutator 17.

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

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

The case body 21 has a cylindrical main portion 22 having a closed front end, an inlet 23 protruding 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 projecting in a direction parallel to the substantially tangential direction.

The rear end of the main portion 22 is externally fitted to the fitting portion 8 on the front side of the end frame 4 to form the pump case 20.

The 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 rotating 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, It flows out through the outlet 24.

A front half of the pump 26 is fitted in the case main body 21 of the pump case 20, and a rear half thereof is fitted in the front fitting part 8 of the end frame 4 so that the pump case 20 and the motor case 2 are connected to each other. The rotating shaft 13 of the motor is inserted through the center hole 26a of the packing 26 for waterproofing between the two.

Reference numeral 27 denotes a waterproof cover formed of a rubber-like elastic material, and includes a main part 28 having a substantially cylindrical shape, a close contact part 29 connected to a rear end of the main part 28, and a front end of the main part 28. The protruding tongue piece 30 is 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 serve as grooves when viewed from the inside are formed in the open portion, and an insertion hole 32 through which the outlet 24 is inserted and an insertion hole 33 through which the cord 19 is inserted in a portion near the front end of the peripheral wall. Are formed.

The close contact portion 29 has a wide annular shape, and is formed so that the diameter becomes smaller toward the rear end, and the inner diameter of the rear end is made smaller than the outer diameter of the case body 3 of the motor case 2. ing. Further, ribs 34, 34 extending in an annular shape 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 through which the inlet 23 is inserted is formed at a front end portion of the tongue piece 30.

The waterproof cover 27 is fitted on the front end of the motor case 2 and the pump case 20. At this time, the base portion of the inlet 23 is inserted through the insertion hole of the tongue piece 30, the base portion of the outlet 24 is inserted through the insertion hole 32 of the main portion 28, and the base portion of the cord 19 is inserted through the insertion hole 33. It

The waterproof cover 27 is attached as described above.

Since the portion of the motor case 2 where the breathing holes 12, 12, ... Are formed is covered by the waterproof cover 27, when water is splashed, the water enters the motor case 2. There is no fear of doing it. 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.

Further, even if water is splashed between the cover 27 and the motor case 2, the water is drained through the groove inside the protrusion 31.

FIG. 9 shows an example in which the modification 27A of the waterproof cover is used. The waterproof cover 27A is not provided with an insertion hole for inserting the cord 19, and the cord 19 is passed through the inside of one protrusion 31. It is designed to be pulled out of the waterproof cover 27A.

[0036]

[Effect of the device]

 As is clear from the above description, in the motor pump device of the present invention, the impeller is arranged in the pump case having the motor section and the inlet and the outlet in which the required motor element is arranged in the motor case. A pump unit in which the impeller of the pump unit is rotated by a rotary shaft protruding from the motor unit into the pump case, and the power supply unit is arranged on the pump unit side of the motor case. At the same time, a cord for supplying power to the power supply part is led out from the side surface of the motor case on the pump part side, and a breathing hole is formed between the motor part and the pump part for communicating the inside and outside of the motor case, It is made of rubber-like elastic material and has a substantially cylindrical shape, and at the same time has a through hole that inserts at least one of the above cord, inlet and outlet. Characterized in that at least the breathing hole is formed partially bars were fitted to cover with no close contact thereto.

Therefore, in the motor pump device of the present invention, even if the motor pump device is exposed to vertical water, 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.

It should be noted that any of 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. It is not something that will be done.

[Brief description of drawings]

FIG. 1 is a vertical sectional view showing an example of implementation 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 cross-sectional view taken along line VI-VI of FIG.

FIG. 5 is a front view showing a cutaway portion.

FIG. 6 is an exploded perspective view showing a 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 sectional view showing an example of a conventional pump motor device.

[Explanation of symbols]

 1 Motor Pump Device 2 Motor Case 12 Breathing Hole 13 Rotating Shaft 18 Power Supply Section 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 unit comprising a motor unit in which a desired motor element is arranged in a motor case, and a pump unit in which an impeller is arranged in a pump case having an inlet and an outlet, which are integrally formed. 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 arranged 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 formed with an insertion hole that inserts at least one of the inlet and the outlet should be adhered to at least the portion where the breathing hole is formed. A motor-pump device, which is fitted over so as to cover it in a closed state.