JPH09261908A - Water-proof motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor with excellent waterproofing properties. SOLUTION: A rotating shaft 6 is vertically-installed on a rotor 5, and the periphery of the rotor 5 is surrounded with an iron core 1. A clearance between the iron core 1 and the rotor 5 is covered with upper and lower brackets 7, 8, and bearings 9, 10 for journaling the rotating shaft 6 are fitted at the upper and lower brackets 7, 8, and the clearance is then filled with filler. A cylindrical body 13 is vertically-fitted at one bracket 8 so as to be integral, and sealing material 16 is provided between the upper and lower brackets 7, 8 and the iron core 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof motor that can be used underwater.

[0002]

As this type of motor, for example, a bear motor, which is an electric motor used for a single-phase power source, is used in general households, factories and the like.
Since the bear motor has characteristics such as extremely simple structure and easy manufacture, and excellent durability and low cost, it is widely used for ventilation fans with low output and no restriction on electrical characteristics. There is. Further, when using the skimming motor for an underwater motor that has a chance to come into contact with water, conventionally, the skimming motor is housed in a waterproof case, and the tip of the rotating shaft of the skimming motor is projected from the waterproof case. Is used.

However, in the case of being housed in a waterproof case, it is difficult to carry out reliable waterproofing for a long period of time because water is likely to enter the inside of the motor due to deterioration of the waterproofness of the waterproof case. For this reason, for example, in a bath water purifying device and an aquarium device that are widely used at home, the actual construction is 63-6994.
As shown in No. 9, a circulation pump is placed above the water in the bathtub, or a high-priced special waterproof motor is used. In the type that is used by being submerged in water, problems such as water entering the motor due to long-term use were likely to occur.

Therefore, an object of the present invention is to provide a waterproof type motor having excellent waterproofness.

[0005]

According to a first aspect of the present invention, in a waterproof motor that rotates a rotor by magnetic flux generated by a stator, the outer periphery of the waterproof motor is covered with a resin mold, and the resin mold A cylindrical body of the motor is provided so as to project outside, a rotary shaft rotated by the rotor is inserted into the cylindrical body, and a sealing material is provided between the tip side of the rotary shaft and the cylindrical body. Since the outer periphery of the waterproof motor is covered with the resin mold, water does not enter the inside, and the space between the tip end side of the rotary shaft and the cylindrical body is waterproofed by the sealing material.

According to a second aspect of the present invention, the rotary shaft is vertically provided on the rotor, the periphery of the rotor is surrounded by the stator, and a gap between the stator and the rotor is closed by upper and lower brackets. A bearing for pivotally supporting the rotary shaft is provided on the upper and lower brackets, a filler is filled in the gap, and the tubular body is vertically installed integrally on one of the brackets, and the upper and lower brackets and the stator are provided. The seal material is provided between
Since the circumference of the rotor is surrounded by the stator, the top and bottom are surrounded by the bracket, and the sealing material is provided between the bracket and the stator, it is possible to effectively prevent water from entering between the bracket and the stator. Furthermore, since the outer periphery is covered with the resin mold, water does not enter the inside. Also,
The space between the tip end side of the rotating shaft and the cylindrical body is waterproofed by a sealant, and moreover, since the inside is filled with a filler, the insides of the rotor and the stator are not directly exposed to water, and The filler absorbs the heat of the stator and bearing.

[0007]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 8 show an embodiment of the present invention, which is an example in which the present invention is applied to a shading motor M.
As shown in FIGS. 1 and 2, the iron core 1 which is the stator is formed by stacking a plurality of silicon steel plates having a thickness of 0.5 mm (millimeters) and coating the outer periphery of the steel plate for rust prevention. A bobbin 2 made of synthetic resin is provided on one side of the iron core 1, and a coil 3 made of copper wire coated with polyurethane is wound around the bobbin 2. The bobbin 2 has collar portions 2A and 2A integrally formed on both sides. Have. A hollow portion 4 is formed on the other side of the iron core 1, and a stainless steel cage rotor 5 as a rotor is vertically installed in the hollow portion 4, and the outer periphery of the rotor 5 is coated with a rust preventive coating. The rotary shaft 6 made of stainless steel is vertically installed integrally with the rotor 5, and
The rotor 5 is located in the hollow portion 4 and is located in the iron core 1.
A pair of convex magnetic poles (not shown) is provided at a position deviated from the center of the rotor 5 with the rotor sandwiched therebetween, and a bearer coil is wound around these convex magnetic poles. Therefore, the starting torque can be applied to the rotor 5 due to the phase difference between the magnetic fluxes generated by the shading coil and the coil 3. Upper and lower brackets 7 and 8 are provided above and below the hollow portion 4, respectively, and these upper and lower brackets 7 and 8 are internally provided with stainless steel bearings 9 and 10, which serve as bearings. The rotating shaft 6 is pivotally supported. Further, with the end portions of the peripheral walls 7A, 8A of the upper and lower brackets 7, 8 abutting the upper and lower surfaces 1A, 1B of the iron core 1, the upper and lower brackets 7, 8 are attached to the iron core 1. It is fixed by fastening means 11 such as a screw. Further, the lower bracket 8
A hole 12 is bored in the hole 12, a cylindrical body 13 is integrally projected in the hole 12, and a pair of sealing materials 14,
14 is provided inside, and the sealing material 14 ensures watertightness between the tip side of the rotary shaft 6 and the inside of the cylindrical body 13. The sealing material 14 is a ring made of NBR or the like, and a lip is used. It is tightened in the radial direction to seal the gap between the rotary shaft 6 and the cylindrical body 13, and an oil seal or the like is also used. Further, as shown in FIG. 1, an intermediate seal material 14A having the same structure as the seal material 14 is provided in the middle of the cylindrical body 13.

Inside the hollow portion 4 and the peripheral walls 7A, 8A
A filler 15 such as silicone oil is filled inside, and a sealant 16 such as silicone adhesive is provided outside the portion where the peripheral walls 7A and 8A and the iron core 1 are provided. Further, the outer periphery of the bear motor M is covered with a resin mold 17 made of epoxy resin, and a part of the cylindrical body 13 is provided so as to project to the outside of the resin mold 17. Further, the motor M is provided with a thermal relay 18, and the thermal relay 18 is one that opens and closes a contact when an overcurrent more than a set value flows in the motor M, a temperature fuse, a thermal protector, or the like. The thermal relay 18 is also covered with the resin mold 17. A waterproof type power cord 19 is connected to the motor M, and the power cord 19 is connected to a power source for home use or the like via an earth leakage breaker 20. Reference numeral 21 in the drawing is a resin cap that holds down the sealing materials 14, 14.

Next, an example of using the waterproof type skimming motor M in the bathtub circulation purifying apparatus will be described with reference to FIGS.
As shown in, the case body 101 of the bath water circulation purification device is formed to be thin in the front-rear direction, and the case body 101 includes an upper case 102 and a lower case 103 that are detachable from each other.
The waterproof type shading motor M is provided in an upper case 102 whose lower part is opened. Lower opening 10 of the lower case 103
5, a bottom lid 106 is detachably provided, and a plurality of suction ports 107 are provided at the center of the bottom lid 106. On both left and right sides of these suction ports 107, locking rails 108 and 108 having a substantially L-shaped cross section in the front-rear direction. A filter frame 109 is detachably provided on the lower portion of the bottom cover 106 along the locking rails 108, 108.
A plurality of water holes 11 are formed in the flat plate portion 110 of the filter frame 109.
1, a sponge-like filter 112 made of polyurethane foam having substantially the same shape as that of the flat plate portion 110 is provided on the upper surface of the flat plate portion 110, and a presser foot for holding the filter 112 at the upper edge of the filter frame 109. A plurality of pieces 113 are provided so as to project inward. In addition, before and after the lower surface of the flat plate portion 110, locking rails 114 having a substantially L-shaped cross section in the left-right direction,
114 is provided, and the upper edge 115A of the substantially dish-shaped cover 115 slides along the locking rails 114, 114, and the cover 115 is detachably provided on the lower surface of the flat plate portion 110 of the filter frame 109. At the same time, it covers the plurality of water passage holes 111. This cover 115 is a hollow part where dust etc. collects inside.
116 has a horizontally long suction cylinder that is a suction hole in the center.
117 is provided so as to project downward, and the suction cylinder portion 117 is formed smaller than the opening area of the plurality of suction ports 107.

An insertion hole 12 is formed in the upper surface 121 of the lower case 103.
2 is provided, and a connecting outer cylinder 123 is provided in the lower part of the insertion hole 122. A plurality of longitudinal outer cylinder inlets 124 are formed on the outer peripheral surface of the connecting outer cylinder 123, and an outer cylinder outlet 125 is formed on the lower peripheral surface of the connecting outer cylinder 123.
A lateral discharge cylinder 127 having a discharge port 126 at its tip is connected to the outer cylinder outlet 125, and a large diameter cylinder 128 is provided on the discharge cylinder 127 as an exterior. 129
Are linked. Then, the suction port 107 and the lower case 10
3 inside, the outer cylinder inlet 124, the inside of the connecting outer cylinder 123, the outer cylinder outlet 125, the water passage from the discharge cylinder 127 to the discharge outlet 126
130 is formed in the lower case 103. In addition, in the lower case 103 forming a part of the water passage 130, the first and second filtering materials 13 made of polyurethane foam are arranged from the bottom.
1 and 132, a third filter medium 133 made of activated carbon, a fifth filter medium 135 made of natural stone and a special ceramic, and a sixth filter medium 136 made of polyurethane foam are stored. In addition, the branch tube 129 has a flexible hose 1
One end of 38 is connected, and this hose 138 is connected to the lower case 1
An adjusting valve 139 for adjusting the air flowing through the hose 138 is provided in the middle of the hose 138 through which the other end of the hose 138 is inserted.

In the upper case 102, there are partition plates on the left and right.
141, 141 are integrally provided, and these partition plates 141, 14
The portion surrounded by 1 is filled with resin to form the resin mold 17 that covers the outer periphery of the shading motor M, and an impeller 142, which is a screw, is provided at the tip of the rotary shaft 6. In addition, a bottom lid is provided in the lower opening 143 of the upper case 102.
144 is fixed, and the rotary shaft 6 is attached to the center of the bottom cover 144.
A connecting inner cylinder 145 into which the front end side of the connecting inner cylinder 145 is inserted is integrally projected downward, and the connecting inner cylinder 145 is formed so as to be capable of being inserted into the connecting outer cylinder 123. An inner cylinder outlet 146 is bored, the tip of the rotary shaft 6 is inserted into the inner cylinder outlet 146, and the impeller 142 is provided at the tip of the rotary shaft 6 protruding downward from the connecting inner cylinder 146. There is. The insertion hole 122 is formed in the upper part of the outer periphery of the connecting inner cylinder 146.
Connecting ribs 147, 147 which are locked to the lower part of the connecting ribs 147, 147 project left and right, and the connecting inner cylinder 145 is formed below the connecting ribs 147, 147 with a plurality of vertical inner cylinder inlets 148. Has been done. The inner inflow port 148 and the inner outflow port 146 are provided corresponding to the outer inflow port 124 and the inner outflow port 125. Before and after the insertion hole 122, rib grooves 149, through which the connecting ribs 147, 147 can be inserted,
149 are formed. Therefore, in a state where the upper case 102 is at a 90 degree plane with respect to the lower case 103, the connecting inner cylinder 145 of the upper case 102 is inserted into the connecting outer cylinder 123 from the insertion hole 122, and the connecting rib 147 is formed into the rib groove. The upper case 102 is inserted through 149, and the upper case 102 is rotated by about 90 degrees so as to be aligned with the lower case 103, so that both are attached and the inner cylinder inlet 148 is fitted to the outer cylinder inlet 124. Further, a fixing means 150 such as a suction cup is provided on the rear surface of the lower case 103. Reference numeral 151 in the drawing denotes a ring that is fitted onto the large diameter cylindrical portion 128 from the outside of the lower case 102.

Next, the motor M used in the bath water purifying apparatus will be described. The case body 101 is arranged in the bath Y, and in this case, it is fixed to the inner surface of the bath Y by the fixing means 150, The case body 1 is set to be submerged in the bath water S. Then, when the motor M is driven, the impeller 142 rotates, the bath water S is discharged from the discharge port 126 of the discharge cylinder 127 by the impeller 142, and the bath water S of the bath Y is discharged from the suction cylinder portion 117 to the lower case. A plurality of filter media 131, 132, 133, 134, 135, 13 are sucked into the inside of 103.
6 is purified through and is sucked into the connecting inner cylinder portion 145 through the superposed outer cylinder inflow port 124 and inner cylinder inflow port 148, and reaches the rotating impeller 142 from the inner cylinder outflow port 143. In addition, the sealing material 16 is used for the brackets 7 and 8 and the iron core 1.
Water does not enter from between the
Since the resin mold 17 is applied to the outer periphery of the bath water S
Even if the motor M is used in the state of being immersed in water, the iron core 1 and the coil 3 are not exposed to water, and the space between the tip end side of the rotary shaft 6 and the cylindrical body 13 is waterproofed by the sealing materials 14 and 14A. Moreover, since the filling material 15 is filled inside, the inside of the rotor 5 and the iron core 1 is not directly exposed to water,
Stable driving can be performed for a long period of time.

Further, in the case body 101, since the suction cylinder portion 117 is formed smaller than the suction port 107,
The suction force becomes large, and large trash and the like that could not be conventionally evacuated can be evacuated, and this trash can be captured by the filter 112. Also, if a relatively large amount of dust accumulates on the bottom surface of the filter 112,
You can remove the cover 115 together with the filter frame 109 by pulling it toward you, and after removing it, pull the cover 115 sideways to remove the cover 115 and remove the dust accumulated on the cover 115. Further, the filter 112 can be removed from the filter frame 109 to facilitate cleaning. Further, the purified bathtub water S is jetted from the discharge port 126, but if this is made into a jet form containing air, the adjustment valve 139 provided on the hose 138 can be opened to open the hose 138. Air is sucked into the large-diameter cylindrical body 128 from the tip, and the bath water S is jetted from the outlet 126. Also, depending on the use, the filter media 131, 132, 133, 134, 135,
When the purifying action of 136 decreases, the upper case 102 can be rotated 90 degrees in a plane with respect to the lower case 103 to separate the two, and only the lower case 103 can be replaced with a new one. When replacing the lower case 103, the filter frame 109, the filter 112 and the cover 115 may be the same as those used before.
Alternatively, since the bottom cover 106 of the lower case 103 is removable, the bottom cover 106 is removed and the filter media 131, 132, 133, and
Only 134, 135 and 136 may be replaced.

As described above, in this embodiment, in the waterproof motor for rotating the rotor 5 as the rotor by the magnetic flux generated from the iron core 1 as the stator, the outer periphery of the waterproof motor M is made of resin. A cylindrical body 13 of the motor M is projected outside the resin mold 17 while being covered with a mold 17, and a rotary shaft 6 rotated by a rotor 5 is inserted into the cylindrical body 13 and a tip side of the rotary shaft 6 is inserted. Sealing material 14 between the
Since the resin mold 17 on the outer periphery does not allow water to enter the inside, the space between the tip end side of the rotary shaft 6 and the cylindrical body 13 is waterproofed by the sealing material 14, and thus relatively An inexpensive general-purpose motor can be used as a waterproof motor.

As described above, in this embodiment, according to the second aspect, the rotor 5 which is the rotor is provided with the rotary shaft 6 vertically, and the rotor 5 is surrounded by the iron core 1 which is the stator. The upper and lower brackets 7 and 8 to close the gap with 5,
Bearings 9, which support the rotary shaft 6 on the upper and lower brackets 7, 8,
10 is provided, the gap is filled with a filler 15, a cylinder 13 is integrally provided vertically on one bracket 8, and a sealing material 16 is provided between the upper and lower brackets 7 and 8 and the iron core 1. Since the circumference of the rotor 5 is surrounded by the iron core 1 and the upper and lower sides are surrounded by the brackets 7 and 8, and the seal material 16 is provided between the brackets 7 and 8 and the iron core 1, the space between the brackets 7 and 8 and the iron core 1 is provided. Water can be effectively prevented from entering, and since the outer periphery thereof is covered with the resin mold 17, water does not enter inside, and a seal is provided between the tip side of the rotating shaft 6 and the cylindrical body 13. Since it is waterproof with the material 16 and is filled with the filling material 15 inside, the surface of the rotor 5 and the inner surface of the hollow portion 4 of the iron core 1 are not directly exposed to water, and the filling material 15 is the iron core. 1 and the heat of the bearings 9 and 10 are absorbed, and the filling material 15 is of the bearings 9 and 10. A lubricant.

Further, as an effect of the embodiment, the sealing material 14
The waterproof property is improved because it is doubled. Furthermore, the upper case
Since 102 itself is a mold, it is easy to mold the resin mold 17, and since the partition plates 141, 141 are provided, the amount of resin used can be reduced. Further, since the impeller 142 which is a centrifugal blade is used for the screw, the bath water S is
Since the water flows from the upper side to the lower side of 13, the force of water entering the lower end of the cylindrical body 13 is not applied. Further, since the general-purpose shading motor M is used, it becomes inexpensive. The rotating shaft 6
Since the bearings 9 and 10 are made of stainless steel, rust does not occur. Since a silicone adhesive is used as the sealing material 16 outside the portion where the peripheral walls 7A, 8A and the iron core 1 are provided, it is hardened after filling for a while, so that the sealing operation can be easily performed.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the present invention. For example, a silicone resin or the like may be used for the resin mold, and various types can be used as long as the sealing materials 14 and 16 are waterproof. Also, various oils can be used as the filler.
Furthermore, the present invention can also be used in a 4-pole bear motor,
Further, the prevention type motor of the present invention can be applied to all those that come into contact with water, such as those for water tanks.

[0018]

According to the invention of claim 1, in a waterproof motor for rotating a rotor by magnetic flux generated from a stator, the outer periphery of the waterproof motor is covered with a resin mold, and the motor is provided outside the resin mold. A cylindrical body of which the rotary shaft rotated by the rotor is inserted, and a sealing material is provided between the tip side of the rotary shaft and the cylindrical body. It is possible to provide an excellent waterproof motor.

According to a second aspect of the present invention, the rotary shaft is vertically provided in the rotor, the periphery of the rotor is surrounded by the stator, and a gap between the stator and the rotor is closed by upper and lower brackets. A bearing for pivotally supporting the rotary shaft is provided on the upper and lower brackets, a filler is filled in the gap, and the tubular body is vertically installed integrally on one of the brackets, and the upper and lower brackets and the stator are provided. The seal material is provided between
A waterproof motor having excellent waterproofness can be provided.

[Brief description of drawings]

FIG. 1 is a sectional view of a resin-molded motor showing an embodiment of the present invention.

FIG. 2 is a perspective view of a motor showing an embodiment of the present invention.

FIG. 3 is a sectional view of a case body showing an embodiment of the present invention.

FIG. 4 is a side view of a case body showing an embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a state in which a connection inner cylinder is connected to a connection outer cylinder showing an embodiment of the present invention.

FIG. 6 is a partially cutaway front view of the case body of the present invention.

FIG. 7 is a state in which a case body showing an embodiment of the present invention is disassembled into an upper case and a lower case, FIG. 7 (A) is a bottom view of the upper case, and FIG. 7 (B) is a plan view of the lower case. Is.

FIG. 8 is a partially cutaway side view showing a filter frame according to an embodiment of the present invention with a cover attached thereto.

[Explanation of symbols]

 1 Iron core (stator) 5 Rotor (rotor) 6 Rotating shaft 13 Cylindrical body 7,8 Bracket 14 Sealing material 15 Filling material 16 Sealing material 17 Resin mold Y Bathtub S Bathtub water

Claims (2)

[Claims] 1. In a waterproof motor for rotating a rotor by magnetic flux generated by a stator, an outer periphery of the waterproof motor is covered with a resin mold, and a cylindrical body of the motor is provided outside the resin mold. A waterproof motor, wherein a rotary shaft rotated by the rotor is inserted into the cylindrical body, and a sealing material is provided between a tip end side of the rotary shaft and the cylindrical body. 2. The rotating shaft is vertically provided on the rotor, the periphery of the rotor is surrounded by the stator, and a gap between the stator and the rotor is closed by upper and lower brackets.
A bearing for pivotally supporting the rotating shaft is provided on the lower bracket, the gap is filled with a filler, and the cylindrical body is vertically installed integrally on one of the brackets, and is provided between the upper and lower brackets and the stator. The waterproof motor according to claim 1, further comprising a sealing material.