JP2007162504A - Pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pump capable of materializing miniaturization and improvement of pump performance while reducing cost of a pump by reducing number of parts of the pump and improving assemblability. <P>SOLUTION: In the pump including a pump part 14 and a motor part 13 isolated from the pump part by an oil seal 36 in a vertical shaft direction of the pump 1, having a motor 30 which consists of a rotor 31 of which rotary shaft 33 is rotatably supported by a front and a rear bearings 34, 35, and a rotor 32 arranged at outer circumference part of the rotor 31 provided in the motor part 13, and having an impeller 50 installed on the rotary shaft 33 arranged on the pump part 14, a casing 10 having the pump part 14 and the motor part 13 formed as one body consists of two divided upper and lower casing 11, 12 including mating surfaces 20, 21 along an axial center C of the rotary shaft 33, and a water intake port 15 and a delivery port 16 establishing communication in the pump part 14 are provided on the casing 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pump, and more particularly, to a pump that has an improved casing structure to reduce the number of parts and improve assembly.

  Pumps are used for transporting liquids in many industrial and industrial devices, including household devices such as water heaters, washing machines, and floor heaters.

  As a conventional example of such a pump, for example, Patent Document 1 discloses a spiral in which an impeller is arranged in a casing having a suction port and a discharge port provided in front of the motor as a separate drive source of the pump. A pump is disclosed.

Further, in Patent Document 2, a stator is housed in a motor frame that is erected above an oil casing above a pump casing, and a motor shaft is led out from the center of a rotor inserted into the stator. Is a saddle type electric pump that is supported by a bearing on the load side mounted on the housing on the lower surface of the motor frame, and whose leading end is mounted on the impeller in the pump casing.
JP-A-9-137791 JP 2005-61377 A

  However, in the conventional pump structure as described above, the motor and the pump unit are separated and a casing constituting the pump unit is mounted on the front surface of the motor, or many casings are arranged in the pump axial direction of the pump. Are connected to form a motor and a pump unit.

  For this reason, the number of parts such as casings, packings and joining screws constituting the pump is increased, and the assembly direction is changed at the time of assembling the pump. There is a problem that the pump size is increased and the pump structure is complicated and the pump performance is affected.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a pump that can reduce the cost of the pump and reduce the size and improve the pump performance by reducing the number of parts of the pump and improving the assembly. .

  The invention according to claim 1 comprises a rotor having a pump part in the longitudinal direction of the pump and a motor part isolated by the pump part and a waterproof member, and a rotary shaft rotatably supported by front and rear bearings; In the pump in which a motor including a stator disposed on an outer peripheral portion of the rotor is disposed in the motor unit, and an impeller mounted on the rotating shaft is disposed in the pump unit, the pump unit and the motor The casing integrally formed with the part is composed of a split part having a mating surface along the axis of the rotating shaft, and the casing is provided with a water intake port and a discharge port communicating with the inside of the pump unit. This is a pump characterized by that.

  The invention according to claim 2 is the pump according to claim 1, wherein the divided body is joined with a packing disposed on a mating surface of the pump portion.

  The invention according to claim 3 is characterized in that the packing is formed integrally with the packing so as to be in close contact with the water inlet opening including the mating surface and the opening inner peripheral portion of the discharge outlet. The pump according to claim 2.

  The invention according to claim 4 is characterized in that a tongue-like projecting portion that is fitted to the outer mating surface of the waterproof member is provided at the end of the packing on the motor portion side. It is a pump.

  According to the first aspect of the present invention, the casing and the motor housing are integrated as a split-divided structure having a surface that matches the casing in the direction of the rotation axis, so that the casing is integrated into two parts, and each part is a casing. Since the casing can be integrated after being accommodated in the pump, the pump can be assembled in one direction in the longitudinal direction of the shaft, and the assemblability is improved. This makes it possible to reduce the number of parts and assembly cost of the pump, reduce the size of the pump, and improve pump performance by simplifying the pump structure.

  According to invention of Claim 2, the water leak from the casing mating surface of a pump part can be prevented.

  According to the third aspect of the present invention, it is possible to reliably prevent water leakage from the water suction port and the discharge port that are opened in the casing mating surface, and the assembly property of the pump is not impaired.

  According to the invention of claim 4, it is possible to more reliably prevent water leakage from the pump portion to the motor side.

  Below, one embodiment of a pump concerning the present invention is described based on a drawing.

  FIG. 1 is an external view of the pump 1, (a) is a front view, (b) is a side view, FIG. 2 is a schematic diagram illustrating a pump configuration showing the inside of the casing, and FIG. 3 is a view of the discharge port from the front. It is an enlarged view.

  As shown in the figure, the casing 10 of the pump 1 is composed of two casings 11 and 12 made of synthetic resin that are divided into two vertically, and the pump portion 14, the pump portion 14, and oil in the longitudinal direction of the pump 1. The motor part 13 that is isolated and waterproofed by the seal 36 is formed.

  The casings 11 and 12 are formed of a two-part divided body having the mating surfaces 20 and 21 along the axis C of the rotating shaft 33 of the motor 30 of the pump 1 in the motor unit 13 and the pump unit 14. Further, pump mounting portions 38 to the apparatus are provided on both sides of the motor portion 13 of the upper casing 11.

  The pump part 14 is provided with a water inlet 15 protruding from the bottom of the pump part 14 of the lower casing 12, and the discharge part 16 is forwardly provided on the mating surface 21 of the upper and lower casings 11, 12 at the front part of the pump part 14. Protrusively provided.

  In the pump 1, the motor 30 and the pump parts are arranged inside the casing 10, the mating surfaces 20 and 21 of the upper and lower casings 11 and 12 are aligned, and a packing 40 is disposed on the mating surface 21 of the pump unit 14. The six screws 19 are fastened and assembled.

  In the motor unit 13, a motor 30 is disposed and fixed to the casing 11 by four support members 37, and the rotation shaft 33 is disposed at the center of the pump 1. This eliminates the need for a separate motor housing.

  The rotor 31 of the motor 30 is provided with a magnet on its outer periphery, and its rotating shaft 33 is rotatably supported by bearings 34 and 35 disposed before and after the motor unit 13. A coil is provided on the outer peripheral portion of the rotor 31. A wound stator 32 is arranged to constitute a motor. In the figure, a control circuit board, wiring, and the like are omitted.

  The type of the motor 30 is not particularly limited, such as a brushless DC motor, an induction motor, or a synchronous motor.

  An impeller 50 is attached to the tip of the rotating shaft 33 of the motor 30, the impeller 50 is disposed in the pump chamber 51 of the pump unit 14, and the water suction port 15 and the discharge port 16 are pumped via the impeller 50. The inside of the pump chamber 51 is communicated.

  The boundary between the motor unit 13 and the pump unit 14 is waterproofed by an oil seal 36 disposed between the outer periphery of the rotary shaft 33 and the inner periphery of the casing 10 in front of the bearing 35 to prevent water from entering the motor unit 13. is doing.

  In the pump 1, the impeller 50 is rotated by driving the motor 30, and water or the like sucked from the water suction port 15 by the pumping action is discharged from the discharge port 16.

The pump 1 having the above configuration reduces the number of parts such as the pump casing, packings, assembly parts, and the like, and improves the assembling performance, thereby reducing the cost of the pump and reducing the size and simplifying the structure. Can improve pump performance
In addition, the upper and lower casings 11 and 12 are joined to the mating surface 21 of the pump unit 14 with the packing 40 disposed.

  The packing 40 is made of a waterproof material such as rubber, urethane, or synthetic resin, and includes a main body portion 44 disposed on the outer peripheral portion of the mating surface 21 of the upper and lower casings 11 and 12, and the inner peripheral portion 16 a of the discharge port 16. A cylindrical portion 41 that is in close contact with the packing 40 is provided integrally with the packing 40.

  In addition, the packing 40 is a tongue-shaped protrusion 42 that covers the outside of the oil seal 36 so as to be fitted into the mating portion of the casings 11 and 12 of the oil seal 36 disposed between the motor unit 13 and the pump unit 14. Are provided at both ends of the packing 40 on the pump part side.

  Since the casing 10 of the pump 1 has a split structure, it is easy to incorporate the tubular portion 41 as described above into the casing, and the assembling property of the pump 1 is not impaired.

  The packing 40 not only prevents water leakage from the mating surfaces 21 of the casings 11 and 12 of the pump unit 14, but also prevents water leakage from the discharge ports 16 formed in the mating surface 21, and further the motor unit 13 side. The water leakage prevention effect can be further ensured. Of course, the packing which abbreviate | omitted the said cylindrical part 41 and the protrusion part 42 may be used.

BRIEF DESCRIPTION OF THE DRAWINGS It is an external view of the pump of embodiment, (a) is a front view, (b) is a side view. It is the schematic explaining a pump structure. It is the enlarged view which looked at the discharge outlet from the front. It is a top view of packing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Pump 10 ... Casing 11 ... Upper casing 12 ... Lower casing 15 ... Water inlet 16 ... Discharge port 20, 21 ... Matching surface 30 ... Motor
31 …… Rotor 32 …… Stator 33 …… Rotating shaft 34, 35 …… Bearing 36 …… Oil seal 50 …… Impeller C …… Shaft center

Claims (4)

A pump part in the longitudinal direction of the pump and a motor part isolated by the pump part and a waterproof member;
A motor including a rotor having a rotary shaft rotatably supported by front and rear bearings and a stator disposed on an outer peripheral portion of the rotor is disposed in the motor unit,
In the pump in which the impeller mounted on the rotating shaft is arranged in the pump unit,
The casing in which the pump part and the motor part are integrally formed is composed of a split part having a split surface along the axis of the rotating shaft,
A pump characterized in that a water intake port and a discharge port communicating with each other in the pump unit are provided in the casing. The pump according to claim 1, wherein the divided body is bonded to a mating surface of the pump portion with packing. The pump according to claim 2, wherein the packing includes a cylindrical portion that is in close contact with the inner peripheral portion of the opening of the water suction port and the discharge port including the mating surface. 4. The pump according to claim 2, wherein a tongue-like projecting portion that is fitted to an outer mating surface of the waterproof member is provided at an end portion of the packing on the motor portion side.

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