JP4957700B2 - Washing machine pump - Google Patents

Description

  The present invention relates to a pump for a washing machine that sucks up washing water in a water tank and distributes it on clothes in a washing and dewatering tank or drains the washing water outside the machine.

  Conventionally, this type of washing machine pump sucks washing water containing lint and waste generated from laundry clothes and pushes it up to a specified discharge port so that it does not clog the pump etc. (For example, refer to Patent Document 1).

  FIG. 5 is a view showing a runner and a pump casing of a conventional washing machine pump described in Patent Document 1. As shown in FIG.

  As shown in FIG. 5, the conventional pump includes a rotary runner 61 and a pump casing 60, and the rotary runner 61 of the pump rises from the runner board 62 and the runner board 62 toward the suction port 64 of the suction pipe 69. 90 and a plurality of runner blades 63 around the cylinder 90.

  The cylinder 90 has a spherically rounded tip 90a, and the runner blades 63 formed on the outer periphery of the cylinder are formed so as to extend radially from the cylinder 90, which is the center of rotation. 63 and runner blades 63a having a low height are alternately arranged.

  Further, the upper end side of the high runner blade 63 and the short runner blade 63a form a downward slope 63b whose height decreases from the rotation center to the outer peripheral side, and the outer peripheral side extends from the runner base 90 side to the suction port 64 side. A slope 63c (angle θ) is formed toward the rotation center as it goes.

  With the configuration as described above, when washing water is sucked into the pump casing 60 from the suction port 64 of the suction pipe 69, it flows in the outer peripheral direction so as to collide with the cylinder 90 and disperse, and the water in the outer peripheral direction is flown. Since the running smoothly flows by providing the cylinder 90 at the center of the rotary runner 61, the yarn waste contained in the washing water is hardly accumulated in the pump casing 60 and is discharged from the discharge port 65.

  Further, the tip 90a of the cylinder 90 is somewhat higher than the upper end of the runner 63 and rounded in a spherical shape, so that the washing water that collides with the cylinder and scatters in the outer peripheral direction is smoothly performed. Further, since the upper end side of the runner blade 63 forms a downward slope 63b from the center to the outer peripheral direction, the flow from the suction port 64 toward the discharge port 65 becomes an angle larger than a right angle, so that the discharge flow to the discharge port 65 is It is hard to clog the thread waste, and the outer peripheral side of the runner blade 63 forms an inclination 63c toward the rotation center, so that the clearance with the inner periphery of the pump casing 60 is increased by the amount of inclination, so that the thread waste is caught. It is difficult.

  In addition, since the plurality of runner blades 63, 63a are configured by combining heights, the runner blades are stepped so that it is difficult for yarn waste to straddle the intersection of the center and the yarn waste is It is said that yarn waste clogging is less likely to occur because it is easily removed in the direction.

As described above, the correspondence of the conventional lint clogging can be achieved by widening the gap between the rotary runner and the pump casing by forming the descending slope 63b and the slope 63c, or by changing the size of the blades of the rotary runner. It is a configuration that tries to reduce clogging and catching of lint.
JP 2005-351225 A

  However, the above-described conventional configuration has a problem that the discharge capacity, which is the basic function of the pump, is inferior because priority is given to measures against yarn waste clogging.

  That is, the pump discharge capacity is required to increase the centrifugal force by making the shape of the runner blade as large as possible and to increase the pressure by reducing the gap with the pump casing. In addition, there is a problem in fail-safe when a foreign matter such as yarn waste has troubled a rotating structure such as a water seal.

  The present invention solves the above-mentioned conventional problems, prevents dripping of water droplets on the charging unit without degrading the basic performance of the pump, and in the unlikely event, the charging to a charging unit such as a motor due to water leakage. An object of the present invention is to provide a washing machine pump having improved safety by preventing moisture from entering and improving insulation performance.

In order to solve the above-described conventional problems, a washing machine pump according to the present invention includes a rotary runner having blades on a pump casing and a runner substrate, a pump motor for driving the rotary runner, and a rotary shaft of the rotary runner. A water seal and a bearing for water sealing, and a bearing plate on which the water seal and the bearing are mounted, the pump casing is arranged at right angles to the inlet and the outlet, and the inlet central axis and the rotating runner are The bearing plate is arranged on the same axis, and the bearing plate forms an opening on the pump motor side of the mounting portion of the water seal, and moisture leaked from the water seal is formed on the bearing plate from the opening. the drainage through the passage is dropped outward from holes provided on the motor cover enclosing the pump motor, the rotating runner, the runner group from the central boss portion The bearing plate has a skirt portion having an arc-shaped cross section extending toward the outer periphery, an extending blade extending to the back side of the runner board, and a cylindrical rib provided on the back side of the runner board. In this configuration, a cylindrical labyrinth rib is provided on the outer periphery of the mounting portion of the water seal, and the tip of the cylindrical labyrinth rib enters the runner substrate side from the end of the cylindrical rib .

  A rotary runner having blades on a pump casing and a runner substrate; a pump motor for driving the rotary runner; a water seal and a bearing for sealing the rotary shaft of the rotary runner; and the water seal and a bearing. A bearing plate mounted thereon, the pump casing is disposed at right angles to the inlet and the outlet, and the central axis of the inlet and the rotary runner are disposed coaxially, and the bearing plate includes the pump motor. The current-carrying terminal is provided facing downward, and a wall-shaped waterproof cover is formed to surround the current-carrying terminal.

  The pump for the washing machine of the present invention prevents the entry of foreign matters such as lint and the entry into important members such as water seals with the shape of the rotating runner, and also prevents water leaks to the seal members and charging parts. Therefore, it is possible to obtain a highly reliable washing machine pump such as a countermeasure against insulation deterioration.

A first aspect of the invention includes a rotary runner having blades on a pump casing and a runner substrate, a pump motor for driving the rotary runner, a water seal and a bearing that seals the rotary shaft of the rotary runner, and the water seal. A seal plate and a bearing plate on which a bearing is mounted, the pump casing is arranged at right angles to the inlet and the outlet, and the inlet central axis and the rotating runner are arranged coaxially, and the bearing plate is An opening is formed on the pump motor side of the mounting portion of the water seal, and moisture leaked from the water seal seal encloses the pump motor through a drain passage formed in the bearing plate from the opening. was dropped from hole provided in the motor cover outward, said rotating runner, cross spread toward the central boss portion in the runner substrate periphery connecting arcuate Ska And an extended blade extending to the back side of the runner board, and a cylindrical rib provided on the back side of the runner board, and the bearing plate has an outer periphery of the mounting portion of the water seal A cylindrical labyrinth rib is provided on the end of the cylindrical labyrinth rib so that the end of the cylindrical rib enters the runner substrate side. In addition, it is possible to obtain a washing machine pump that prevents water from entering from the motor shaft portion to the pump motor, which is a charging unit, and does not lead to a decrease in insulation or the like and that is excellent in safety.

  A second invention includes a rotary runner having blades formed on a pump casing and a runner substrate, a pump motor for driving the rotary runner, a water seal and a bearing for sealing a rotary shaft of the rotary runner, and the water seal. A seal plate and a bearing plate on which a bearing is mounted, the pump casing is arranged at right angles to the inlet and the outlet, and the inlet central axis and the rotating runner are arranged coaxially. The pump motor energizing terminal is provided facing downward, and the wall-shaped waterproof cover that surrounds the energizing terminal is formed so that moisture dripping due to condensation does not enter the charging part. A washing machine pump can be obtained in which the properties are not impaired.

A third invention is especially, rotating runner of the second invention, cross-section extending toward the central boss portion in the runner substrate periphery and a skirt portion which connects an arcuate and extends to the back side of the runner substrate An extending blade, and a cylindrical rib provided on the back side of the runner substrate, and the bearing plate is provided with a cylindrical labyrinth rib on the outer periphery of the mounting portion of the water seal, and the cylindrical labyrinth rib By configuring the tip to enter the runner substrate side from the end of the cylindrical rib, the risk of water flowing smoothly to the discharge port side and lint etc. wrapping around the blade is reduced. By scattering foreign matter that has entered the back surface of the substrate, foreign material can be prevented from entering the back surface portion of the runner substrate, and the labyrinth configuration can prevent foreign materials from entering the inner water seal and the motor shaft.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
1 is a cross-sectional view of a washing machine incorporating a washing machine pump according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view of the main part of the washing machine pump, and FIG. 3 is the washing machine pump. FIG. 4 is a partial sectional front view of the washing machine pump.

  As shown in FIG. 1, the drum-type washing machine according to the present embodiment includes a rectangular base frame 1, a substantially rectangular box-shaped outer box 2 above and an operation panel 4 above the outer box 2, The panel board 3 provided with the water supply port 5 is arranged.

  A water tank 7 is swingably supported by the base frame 1 inside the outer box 2 by a suspension 6, and a drum 8 having a large number of small holes 9 in the peripheral wall is freely washed and dewatered inside the water tank 7. Is pivotally supported.

  A lid 10 is disposed in front of the outer box 2 so as to be openable and closable corresponding to the drum opening 11 of the drum 8 and the water tank opening 12 of the water tank 7.

  Washing water is supplied into the drum 8 and the water tank 7 from the water supply valve 13 connected to the water supply port 5 above the panel plate 3, and the drum 8 is rotationally driven by a motor 14 fixed to the outer bottom of the water tank 7. Washing and rinsing are performed.

  A drain hose 16 is connected to the bottom drain port 15 of the water tank 7 and connected to a circulation pump 17, and a discharge hose 18 connected to the circulation pump 17 extends upward and is disposed at a water tank opening 12. Further, the washing water 20 is spread from the drum opening 11 to the inner garment 21, and the washing liquid is well soaked into the garment to enhance the cleaning effect.

  As shown in the cross-sectional view of the main part of FIG. 2, the washing machine pump constituting the circulation pump 17 is connected to the discharge hose 16 and the inlet 22 into which the washing water 20 flows, and is arranged substantially at right angles to the inlet 22. A so-called centrifugal force composed of a pump casing 25 having a discharge port 24 connected to the discharge hose 18, a rotary runner 23 disposed coaxially with the inlet 22, and a pump motor 26 that rotationally drives the rotary runner 23. This is a type of pump configuration.

  A bearing plate 28 is disposed between the motor cover 27 that houses the pump motor 26 and the pump casing 25, and the outer peripheral portion of the pump casing 25 is watertightly fixed by an O-ring 29 such as rubber. The rotating shaft 31 of the rotating runner 23 is sealed with a water seal 30.

  The rotary shaft 31 is fixed to a rotor (rotor) 33 of a pump motor 26 having a magnet 32 and is rotatably supported by a plurality of bearings 34 provided in the bearing plate 28.

  The shape of the rotary runner 23 forms an arc-shaped skirt portion 35 having a radius (R) having a large cross section from the tip on the inlet 22 side toward the outer periphery of the substantially disc-shaped runner substrate 36.

  Further, the plurality of blades 38 formed on the outer periphery of the central boss portion 37 form an extended blade 39 that extends to the back surface side (the right side in FIG. 2) of the runner substrate 36.

  Furthermore, a plurality of cylindrical ribs 40a and inner cylindrical ribs 40b are formed on the back surface side (right side in FIG. 2) of the runner substrate 36, and the boss portion 42 to which the water seal 30 at the center of the bearing plate 28 is attached. On the outer periphery, the cylindrical labyrinth rib 41 is configured in a labyrinth shape so that the tip thereof is overlapped between the cylindrical rib 40a and the inner cylindrical rib 40b and enters the runner board 36 side from the end.

  A plurality of bearings 34 that support a rotating shaft 31 that is a rotating shaft of the rotary runner 23 and that is also a rotating shaft of the pump motor 26 and a bearing plate 28 that supports the water seal 30 are mounted in the vicinity of the mounting of the water seal 30. An opening 43 is formed on the pump motor 26 side, and this opening 43 communicates outward from the through hole 45 of the motor cover 27 through a water drain passage 44 formed integrally with the bearing plate 28.

  In FIG. 3, the central boss portion 37 forms a skirt portion 35 that gently extends from the spherical tip portion 37 b from the boss tip portion 37 a to the outer peripheral portion of the runner substrate 36. The plurality of blades 38 have the same shape and are formed as continuous blades with the extended blade 39 extending to the back side of the runner substrate 36.

  As shown in the front view of FIG. 4, the circulation pump 17 is formed so that the drainage passage 44 is directed vertically downward from the center. The energization terminal 46 to the pump motor 26 is configured to face downward from the bearing plate 28, and a wall-shaped waterproof cover portion 47 integrally formed with the bearing plate 28 surrounds the energization terminal 46 on the outer periphery of the energization terminal 46. It is configured as follows.

  About the washing machine pump comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  As the shape of the rotating runner 23 is the central boss portion 37, an arc-shaped skirt portion 35 having a large radius (R) from the tip on the inlet 22 side toward the runner substrate 36 is formed. The washed water 20 flows along the surface of the arc-shaped skirt portion 35 as indicated by an arrow A in FIG. 2, thereby reducing the risk of lint and the like winding around the blades 38.

  Further, the plurality of blades 38 having the same shape formed on the outer periphery of the central boss portion 37 formed extended blades 39 extending to the back side of the runner substrate 36, so that foreign matter that has entered the back surface portion of the runner substrate 36. Is prevented from entering the back surface of the runner board 36.

  Further, a plurality of cylindrical ribs 40a and inner cylindrical ribs 40b are formed on the back surface side (right side in the drawing) of the runner substrate 36, and the outer periphery of the boss portion 42 to which the water seal 30 at the center of the bearing plate 28 is attached. Further, since the labyrinth is configured so that the tip of the cylindrical labyrinth rib 41 overlaps the runner substrate 36 side from the end of the cylindrical rib 40, the inner water seal 42 and the motor shaft 31 portion It is possible to prevent foreign substances from entering the device.

  Further, the bearing plate 28 is formed with an opening 43 on the side of the pump motor near the attachment of the water seal 30, and the opening 43 is connected to the motor cover 27 via a water drain passage 44 formed integrally with the bearing plate 28. In this case, even if water leaks from the water seal 42 part, the motor shaft 31 part is prevented from entering the pump motor 26 which is a charging part. We do not lead to serious accidents such as decline.

  Further, the energization terminal 46 to the pump motor 26 that must be exposed to the outside in the structure is configured to face downward, and a waterproof cover portion 47 integrally formed with the bearing plate 28 is provided on the outer periphery of the energization terminal 46. Since it is formed so as to surround the periphery, moisture dropped by condensation or the like does not enter the charging portion, so that the insulating property is not impaired.

  As described above, in the present embodiment, the shape of the rotating runner prevents foreign matter such as lint from being collected and entry into an important member such as a water seal, and in the unlikely event that water leaks into the seal member. Since countermeasures such as moisture intrusion into the charging unit are taken, it is possible to obtain a washing machine pump with high reliability such as countermeasures against insulation deterioration.

  In this embodiment, in order to enhance the cleaning effect, the washing water is circulated and distributed from the drum opening to the clothes inside, but the washing machine drain that drains the washing water in the aquarium to the outside of the machine is described. Applicable to pumps.

  As described above, the washing machine pump according to the present invention can be applied to uses such as a water supply device such as a pump because foreign matter can prevent the rotation runner and the water seal from deteriorating.

Sectional drawing of the washing machine incorporating the pump for washing machines in Embodiment 1 of this invention Cross section of the main part of the washing machine pump Perspective view of rotary runner of pump for washing machine Partial sectional front view of the washing machine pump The figure which shows the runner and pump casing of the pump for conventional washing machines

2 Outer box 7 Water tank 8 Drum 9 Small hole 17 Circulating pump 22 Inlet 23 Rotating runner 24 Discharge port 25 Pump casing 26 Pump motor 27 Motor cover 28 Bearing plate 30 Water seal 31 Rotating shaft 34 Bearing 35 Skirt part 36 Runner board 37 Central boss portion 38 blade 39 extended blade 40a cylindrical rib 40b inner cylindrical rib 41 cylindrical labyrinth rib 43 opening portion 44 drainage passage 45 through hole 46 energizing terminal 47 waterproof cover portion

Claims (3)

A rotary runner configured with blades on a pump casing and a runner board, a pump motor for driving the rotary runner, a water seal and a bearing for sealing the rotary shaft of the rotary runner, and the water seal and the bearing are mounted. A bearing plate, the pump casing is arranged at right angles to the inlet and the outlet, and the inlet central axis and the rotary runner are arranged coaxially, and the bearing plate is an attachment portion of the water seal An opening is formed on the pump motor side, and moisture leaked from the water seal is transmitted through a drain cover formed in the bearing plate from the opening to a motor cover that contains the pump motor. was added dropwise outward from the hole, the rotary runners, a skirt section extending toward the central boss portion in the runner substrate periphery has signed an arc shape, and the An extending blade extending to the back surface side of the inner substrate and a cylindrical rib provided on the back surface side of the runner substrate, and the bearing plate has a cylindrical labyrinth rib on the outer periphery of the mounting portion of the water seal The washing machine pump is configured such that the tip of the cylindrical labyrinth rib enters the runner substrate side from the end of the cylindrical rib . A rotary runner configured with blades on a pump casing and a runner board, a pump motor for driving the rotary runner, a water seal and a bearing for sealing the rotary shaft of the rotary runner, and the water seal and the bearing are mounted. A bearing plate, the inlet and outlet of the pump casing are arranged at right angles, and the central axis of the inlet and the rotating runner are arranged coaxially, and the bearing plate has an energizing terminal for the pump motor. A washing machine pump having a configuration in which a wall-shaped waterproof cover surrounding the energizing terminal is formed. The rotating runner is provided on the back side of the runner board, a skirt part having a circular section extending from the central boss part toward the outer periphery of the runner board, an extended blade extending to the back side of the runner board, and the back side of the runner board A cylindrical labyrinth rib is provided on the outer periphery of the mounting portion of the water seal, and the tip of the cylindrical labyrinth rib is closer to the runner substrate than the end of the cylindrical rib. The washing machine pump according to claim 2 , wherein the washing machine pump is configured to enter.

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