WO2020184808A1

WO2020184808A1 - Rechargeable water pump

Info

Publication number: WO2020184808A1
Application number: PCT/KR2019/016469
Authority: WO
Inventors: 조진혁; 김태우
Original assignee: (주)아이에이치피엠
Priority date: 2019-03-12
Filing date: 2019-11-27
Publication date: 2020-09-17
Also published as: KR102020834B1

Abstract

The present invention relates to a rechargeable water pump comprising: a water pump main body (100) having a motor installed therein; and a pump (200) which receives power from the motor of the water pump main body (100) to receive external water and discharge the water to the outside. The pump (200) has a water inlet (210), which is formed on one side and receives the external water, and a water outlet (300), which is formed on the other side and discharges the water which has flowed into the pump (200) to the outside; and a coupling (1) is installed between the pump (200) and the motor installed inside the water pump main body (100). The present invention has the significant effects of being low-cost, being easy to manufacture, and having facilitated power transmission because the energy consumed for transmitting power is low, due to the straightness, concentricity, and angularity of the coupling installed between the water pump main body and the pump being easily adjusted.

Description

Rechargeable water dispenser

The present invention relates to a rechargeable water pump, and more particularly, a rechargeable motor is installed inside the pumping body, and a coupling is installed in the motor installed inside the pumping body, so that power is lost when power is transmitted from the pumping body to the pump. It relates to a rechargeable water dispenser that is minimized.

According to the water pump using the hydraulic power of Registered Patent Publication No. 10-1011001 as a prior art, in a water pump using hydraulic power configured to pump water including a strong water pressure of incoming water and a gear meshed and connected to each other, the inflow The screw 10 is installed in the screw pipe 11 in which a water outlet 11a is formed on one side and a strainer 11b is installed on the other side so as to rotate by the strong water pressure of water; The shaft of the screw 10 is connected to the outer central part, and an internal gear 20 installed at one end of the screw pipe 11 so as to be rotated by the rotation of the screw 10 is provided; The driven gear 30 installed to be rotatable on one side of the shaft support 60 is engaged and connected to the inner gear 20; The gear 41 of the water pump 40 is installed so as to be rotatable in the central part of the shaft support 60, and one end of the shaft is connected to the bearing 21 installed in the inner central part of the inner gear 20. Engaged with the gear 30; The water pump 40 is embedded in a case 50 in which one end of the screw pipe 11 and the flange portion thereof are coupled to each other by a fastening bolt 70, and the suction pipe 42 of the water pump 40 A water pump using hydraulic power is disclosed, characterized in that the water storage unit 43 is connected to one end of ).

As another conventional technique, according to the electric water pump of Registration Patent Publication No. 10-0837390, the absorption port 1b is formed to be connected to the center of the pumping chamber 1a, and the discharge port 1c is connected to the upper part of the pumping chamber 1a. It is formed, and an impeller (1d) is installed inside the pumping chamber (1a), and the pumping unit (1) with a grounding protrusion (1i) at the bottom of the outer wall of the pumping chamber (1d) and the rotating shaft (2a) of the electric motor (2) are connected to the impeller (1d). In a known electric water pump that is connected to rotate the impeller 1d by the force of the electric motor 2, the outer cylinder 4 is covered so that a storage chamber 3 is formed around the outer circumferential wall 2b of the electric motor 2 Thus, the inner end (4a) of the outer cylinder (4) and the inner end (2c) of the outer circumferential wall (2b) are connected to the outer connecting portion (1f) and the inner connecting portion (1g) formed on the pumping portion (1) and the outer wall (1e). Combined, insert packing (5) (5a) into the coupling part, fasten with bolts (6), and communicate with the pumping chamber to the gap formed between the inner and outer connection parts (1f) (1g) of the pumping part (1) outer wall (1e). A cooling device made to communicate water between the storage chamber 3 and the pumping chamber 1a around the electric motor 2 by drilling a hole 7 to protect the outside of the power supply unit 8 of the electric motor 2 An electric water pump with a cover (9) and a packing (11) (11a) in the sealing part (9a) that connects with the storage chamber (3) and fastened with a bolt (10) and a nut (10a) to form a short circuit prevention part It is public.

However, conventional water pumps as described above are not rechargeable, expensive to manufacture, and difficult to make due to their complex structure, and since the coupling is not installed on the motor of the water pump, the straightness, concentricity, and advance angle when power is transmitted from the pumping body to the pump. It was difficult to control, and there was a drawback of high energy consumption in power transmission.

Therefore, the present invention was conceived to solve the above problems, and the cost is low, it is easy to manufacture, and a coupling is installed between the pumping body and the pump, and the straightness, concentricity, and advance angle of the coupling are easily adjusted. Therefore, it is intended to provide a rechargeable water pump that is easy to transmit power because the energy consumed in power transmission is small.

The present invention relates to a rechargeable water dispenser, and a pumping body 100 with a motor installed therein,

Consisting of a pump 200 that receives power from the motor of the pumping body 100 and introduces external water to discharge water to the outside,

The pump 200 is provided with a water inlet 210 for introducing external water on one side, and a water outlet 300 for discharging the water introduced by the pump 200 to the outside on the other side, and the pumping body (100) It is characterized in that the coupling (1) is installed between the motor and the pump 200 installed inside.

Therefore, the present invention is inexpensive, easy to manufacture, and a coupling is installed between the pumping body and the pump, and the coupling easily adjusts the straightness, concentricity, and advancement angle so that the energy consumed in power transmission is small This ease of use has a remarkable effect.

1 is a photograph of the present invention rechargeable water dispenser

Figure 2 is an internal photograph of the coupling installed in the present invention rechargeable water dispenser

Figure 3 is an external photograph of the coupling installed in the present invention rechargeable water dispenser

Figure 4 is an exploded photograph of the coupling installed in the present invention rechargeable water dispenser

Figure 5 is a photograph of the cover of the coupling installed in the present invention rechargeable water dispenser

6 is a photograph of a circular plate of a coupling installed in the present invention rechargeable water dispenser

7 is a photograph of the gear of the coupling installed in the present invention rechargeable water pump

8 is a photograph of the gear teeth of the gear of the coupling installed in the present invention rechargeable water dispenser

9 is a photograph of a press manufacturing the rotating plate of the coupling cover of the present invention

10 is a photograph showing a state in which a snap ring insertion groove is formed in the power transmission shaft coupled to the rotating plate of the present invention

11 is a photograph showing a state in which a snap ring is coupled to the power transmission shaft of the cover of the present invention

12 is a schematic diagram showing the steps of manufacturing the rotating plate of the present invention cover

10: gear 11: fastening body

12: gear teeth 13: bolt hole

20: circular plate 21: coupling hole

22: protruding jaw

30: cover 31: cover body

32: rotating plate

40: power transmission shaft

41: snap ring insertion groove 42: snap ring

100: water base 200: pump

210: water inlet 220: water outlet

400: press

410: lower die 411: seating groove

412: circular hole

420: upper die 421: first pressing protrusion

In addition, the coupling (1) is a gear 10 coupled to the rotation shaft of the motor,

A circular plate 20 connected to the gear 10 to receive the power of the gear 10,

The circular plate 20 is made of a cover 30 coupled therein,

The cover 30 is coupled to the housing of the motor, and a power transmission shaft 40 is formed on the outside of the cover 30 and connected to the circular plate 20 inside the cover 30 to transmit power to the mechanical device. It is characterized in that the power transmission shaft 40 transmits power to the connection bar.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 is a photograph of the present invention rechargeable water dispenser, Figure 2 is an internal photograph of the coupling installed in the present invention rechargeable water dispenser, Figure 3 is an external photograph of the coupling installed in the present invention rechargeable water dispenser, Figure 4 is in the present invention rechargeable water dispenser An exploded picture of the coupling to be installed, Figure 5 is a photograph of the cover of the coupling installed in the present invention rechargeable water dispenser, Figure 6 is a photograph of the circular plate of the coupling installed in the present invention rechargeable water dispenser, Figure 7 is installed in the present invention rechargeable water dispenser A photograph of the gear of the coupling, Figure 8 is a photograph of the gear teeth of the gear of the coupling installed in the present invention rechargeable water dispenser, Figure 9 is a photograph of a press manufacturing the rotating plate of the coupling cover of the present invention, Figure 10 is a rotating plate of the present invention A photograph showing a state in which a snap ring insertion groove is formed on the combined power transmission shaft, FIG. 11 is a photograph showing a state in which the snap ring is coupled to the power transmission shaft of the present invention cover, and FIG. 12 is a manufacturing of a rotating plate of the present invention cover. It is a schematic diagram showing the steps to do.

The present invention relates to a rechargeable water pump, in which a rechargeable motor is installed inside the pumping body, and a coupling is installed in the motor installed inside the pumping body, so that power loss is minimized when power is transmitted from the pumping body to the pump. It is about a water pump.

Water pumps that are generally used for irrigation or drainage are called agricultural water pumps, and are largely divided into simple pumps, reciprocating pumps, rotary pumps (rotary pumps), and special pumps. Centrifugal pumps are widely used as agricultural pumps, and are composed of impeller, casing, and ground packing.

In the present invention, the rechargeable water pump comprises a pumping body 100 having a motor installed therein, and a pump 200 receiving power from the motor of the pumping body 100 to inflow water from the outside and discharge water to the outside.

The pump 200 is provided with a water inlet 210 for introducing external water on one side, and a water outlet 300 for discharging the water introduced by the pump 200 to the outside on the other side, and the pumping body (100) A coupling (1) is installed between the motor and the pump (200) installed inside.

An external battery for supplying power to a rechargeable motor installed inside the pumping body is provided outside the pumping body.

The coupling is coupled to a rotation shaft of a motor to transmit power to a mechanical device, and a gear 10 coupled to the rotation shaft of the motor and a circular plate connected to the gear 10 to receive the power of the gear 10 (20) and a cover 30 to which the circular plate 20 is coupled therein.

The cover 30 is coupled to the housing of the motor, and a power transmission shaft 40 is formed on the outside of the cover 30 and connected to the circular plate 20 inside the cover 30 to transmit power to the mechanical device. have.

That is, the cover 30 is coupled to the center of the cover body 31, the rotation plate 32 rotatably coupled to the inside of the cover body 31, and the rotation plate ( 32) and rotates with the cover body 31 and is formed of a power transmission shaft 40 protruding to the outside.

The power transmission shaft is coupled by passing through the rotation plate and the cover body from the rear to the front, and the power transmission shaft is manufactured by punching, and the rear of the power transmission shaft is formed with a larger diameter than the front.

The rotating plate is formed and processed by a press, and the rotating plate has a cylindrical shape when the shape is processed by a press, but the upper part is open, and after the shape processing, a half-moon-shaped hole is processed to penetrate the front and rear of the rotating plate.

In the method of coupling the power transmission shaft of the cover and the rotation plate, after the rotation plate is connected to the rear of the cover, the power transmission shaft penetrates the cover and the rotation plate, and the rear is coupled to the rotation plate by welding.

The gear 10 is composed of a pipe-shaped fastening body 11 coupled to the rotation shaft of the motor, and a plurality of gear teeth 12 protruding from the outer periphery of the end portion of the fastening body 11.

It is preferable that 6 gear teeth formed on the fastening body are formed at regular intervals, and the cross section is “

”It is formed in a shape.

If the number of gear teeth is 6, it is easy to transmit power because there are many parts of the gear teeth in contact with the circular plate.

If the number of gear teeth formed on the fastening body is less than 6, when the gear teeth formed on the fastening body transmit power to the circular plate, the contact portion is reduced, resulting in a lot of power loss.

When the number of gear teeth formed on the fastening body exceeds 6, the size of the gear teeth formed on the fastening body decreases, causing a phenomenon of breaking.

In addition, a round is formed between the gear teeth formed on the fastening body and the other gear teeth that are adjacent to each other, and is formed at 10 to 25°.

And the end round of the gear teeth is formed in 2 ~ 9 °.

Accordingly, when the gear teeth of the gear transmit power to the circular plate, friction due to pinching between the gear and the circular plate does not occur, noise and vibration are reduced, and an overload during power transmission can be prevented.

In addition, the gear has a bolt hole 13 formed on the outer periphery of the fastening body, so when it is coupled to the rotation shaft of the motor, first insert the fastening body of the gear to the rotation shaft and then insert the bolt into the bolt hole formed in the fastening body to rotate the shaft. To engage the gear.

The gear is to process a cylindrical metal material. First, the cylindrical material is divided into upper and lower ends so that the diameter of the lower end is smaller than the diameter of the upper end.

And the upper end of the material is processed to form a hexagonal star shape by forming gear teeth.

Then, the insertion hole is processed so that the rotation shaft of the motor is inserted through the top and bottom of the material.

A hole is formed in the outer periphery of the lower end of the material, and a screw surface is formed in the inner diameter of the hole to manufacture a gear.

The circular plate 20 to which the gear 10 is coupled has a coupling hole 21 formed at the center to correspond to the shape of the gear teeth 12 formed on the outer periphery of the gear 10.

The circular plate has a disk shape, and a plurality of protruding jaws 22 are radially formed at an end thereof, and the protruding jaws are coupled to a rotating plate coupled to a cover. A coupling hole is formed in the rotating plate so that a plurality of protruding jaws formed on the circular plate can be inserted and coupled.

Accordingly, when the gear is coupled to the rotating shaft of the motor and rotates together with the rotating shaft, the gear rotates the circular plate, and the circular plate is coupled to the rotating plate of the motor, so that the rotating plate also rotates.

And as the rotating plate rotates, the power transmission shaft coupled to the rotating plate also rotates.

In addition, the coupling hole formed in the circular plate is formed in a hexagonal star shape, and its cross section is “

”It is formed in a shape.

In addition, the gear teeth part is inserted into the coupling hole of the circular plate to transmit power, and the gear teeth of the gear and the coupling hole of the circular plate are formed at intervals of 0.5 to 2 mm.

Accordingly, when the gear rotated by the rotation shaft of the motor rotates by the motor, the transmitted power is lost due to the clearance space between the gear teeth and the circular plate even if the vibration of the motor and the vibration due to external shock transmitted from the working part occur. Can be prevented.

In addition, the gear teeth are formed to have a certain thickness in the longitudinal direction of the coupling body of the gear, and the circular plate is formed to have a thickness of 1/2 to 1/5 of the thickness of the gear teeth.

Accordingly, even if the length of the rotation shaft of the motor is different, the thickness of the gear teeth of the gear coupled to the rotation shaft is thicker than that of the circular plate, so that power can be easily transmitted to each other.

Therefore, when the gear transmits power to the circular plate, the straightness, concentricity, and advance angle can be adjusted.

In addition, the gear is made of a metal material, and the circular plate is made of a metal material or a synthetic resin material. When the circular plate is made of a metal material, it is used where durability is required and an instantaneous force is required, and when the circular plate is made of a combined resin material, the load of the motor is minimized and the efficiency of power transmission is increased. Used for

The circular plate is shaped by forming a coupling hole in the center of the circular plate by a press, and protruding jaws are formed on both sides when the circular plate is shape-processed by the press, and the protruding jaw is bent by a worker by 90° using a hand tool. .

Meanwhile, as another embodiment of the cover of the present invention, a method of manufacturing the cover will be described as follows.

First, first, a rotating plate is manufactured, and the first step of manufacturing the rotating plate includes a material having a circular plate shape.

In the second step, the raw material of the circular plate is processed by a press to form a semi-finished product of the rotating plate. The semi-finished rotary plate shape processed by the press 400 is formed in a cylindrical shape with an open top, and a circular hole is formed on the lower surface of the semi-finished rotary plate.

The press 400 is made of a lower die 410 and an upper die 420, the lower die 410 has a cylindrical seating groove 411 formed on the upper surface, the inside of the seating groove 411 A circular hole 412 in a circular shape is formed on the lower surface.

In addition, the upper die 420 has a first pressing protrusion 421 having a cylindrical shape on its lower surface, and a second pressing protrusion having a cylindrical shape on the lower surface of the first pressing protrusion 421.

The diameter of the seating groove formed in the lower die is larger than that of the first pressing protrusion formed in the upper die, so that the first pressing protrusion is inserted into the seating groove. And when the first pressing protrusion is inserted into the seating groove, the second pressing protrusion formed on the lower surface of the first pressing protrusion is inserted into a circular hole formed in the inner lower surface of the seating groove, and the second pressing protrusion and the circular hole have a diameter. Is formed identically. Therefore, the rotating plate formed by the press is formed in a cylindrical shape with an open top surface, but a circular hole is formed on the inner bottom surface.

In the third step, a pair of arc-shaped arc holes are formed around the circular holes of the semi-finished rotating plate to form a rotating plate as a finished product. The circular hole formed in the semi-finished product of the rotating plate is formed by a punching machine.

And secondly, the cover body is molded into a mold.

And thirdly, the power transmission shaft is molded into a mold.

The power transmission shaft is formed in a cylindrical shape, the rear diameter is formed larger than the front diameter. In addition, a screw surface is formed in front of the power transmission shaft, and a snap ring insertion groove 41 is formed in the outer periphery of the power transmission shaft.

And fourthly, the cover body, the rotating plate and the power transmission shaft are combined, and the coupling method is as follows.

A ring-shaped bearing is installed inside the cover body, and a rotary plate is placed at the rear of the bearing, and the open portion of the rotary plate is placed so as to look outside while being coupled to the cover body.

And the bearing is fixedly coupled to the cover body while being coupled to the power transmission shaft.

Further, the power transmission shaft is forcibly coupled to pass through the cover body, the bearing and the rotating plate, and is coupled by a punching machine.

Then, the rotating plate and the power transmission shaft are coupled by welding so that they are not separated.

Thereafter, a snap ring 42 is coupled to the snap ring insertion groove 41 formed on the outer periphery of the power transmission shaft 40, and the snap ring insertion groove formed on the power transmission shaft is formed in front of the bearing seat. , After the power transmission shaft passes through the bearing, the snap ring is coupled to the snap ring insertion groove. Accordingly, the bearing ring coupled to the power transmission shaft is not separated by the snap ring.

Therefore, while being coupled to the cover body, the rotating plate and the power transmission shaft are rotatably installed.

On the other hand, as another embodiment of the circular plate, the circular plate has a hexagonal star-shaped coupling hole, but both sides of the coupling hole are formed with arc-shaped circular projections.

The arc protrusion formed on the circular plate is forcibly fitted into the arc hole formed in the rotating plate of the cover to be coupled, so that the rotating plate and the circular plate of the cover are coupled.

And the circular plate is made of a metal material or a synthetic resin material.

When the circular plate is made of a metal material, it is used in a place where durability is required or an instant force is required although the weight is heavy.

When the circular plate is made of synthetic resin, it is light in weight, minimizes the load on the motor, and is used to increase power transmission efficiency.

Claims

The pumping body 100 with a motor installed therein,

Consisting of a pump 200 that receives power from the motor of the pumping body 100 and introduces external water to discharge water to the outside,

The pump 200 is provided with a water inlet 210 for introducing external water on one side, and a water outlet 300 for discharging the water introduced by the pump 200 to the outside on the other side, and the pumping body (100) In the rechargeable water pump having a coupling (1) installed between the motor and the pump 200 installed inside,

The coupling (1) is coupled to the rotation shaft of the motor to transmit power to the mechanical device, and the gear (10) is coupled to the rotation shaft of the motor, and is connected to the gear (10) to control the power of the gear (10). Consisting of a circular plate 20 to be transmitted and a cover 30 to which the circular plate 20 is coupled therein,

The cover 30 is coupled to the housing of the motor, and a power transmission shaft 40 is formed on the outside of the cover 30 and connected to the circular plate 20 inside the cover 30 to transmit power to the mechanical device. In addition, the power transmission shaft 40 transmits power to the connection bar, and the cover 30 includes a cover body 31 and a rotation plate 32 rotatably coupled within the cover body 31 , It is made of a power transmission shaft 40 coupled to the center of the rotating plate 32, rotating together with the rotating plate 32, penetrating the cover body 31 and protruding to the outside,

The power transmission shaft 40 is coupled by passing through the rotation plate 32 and the cover body 31 from the rear to the front, the power transmission shaft 40 is manufactured by punching, and the rear of the power transmission shaft 40 It is formed thicker in diameter than the front, and the rotating plate 32 is formed and processed by a press 400, and the rotating plate 32 has a cylindrical shape when the shape is processed by a press 400, and the upper part is opened. , After shape processing, a half-moon-shaped hole is processed to penetrate the front and rear of the rotating plate 32,

The cover 30, the rotation plate 32, and the coupling method of the power transmission shaft 40 is after coupling the rotation plate 32 to the rear of the cover 30, the power transmission shaft 40 and the cover 30 It penetrates the rotating plate 32 and the rear is coupled to the rotating plate 32 by welding,

The gear 10 is made of a pipe-shaped fastening body 11 coupled to the rotation shaft of the motor, and a plurality of gear teeth 12 protruding from the outer periphery of the end of the fastening body 11, and the fastening Six gear teeth 12 formed on the body 11 are formed at a certain interval, and the cross section is “
”It is formed in a shape,

If there are six gear teeth 12, it is easy to transmit power because there are many parts in which the gear teeth 12 contact the circular plate 20, and are close to the gear teeth 12 formed on the fastening body 11 A round is formed between the other gear teeth and is formed at 10 to 25°, the end round of the gear teeth 12 is formed at 2 to 9°, and the gear teeth 12 of the gear 10 are circular plates ( When power is transmitted to 20), friction due to pinching of the gear 10 and the circular plate 20 does not occur, noise and vibration are reduced, and overloading during power transmission can be prevented.

The gear 10 has a bolt hole 13 formed on the outer periphery of the fastening body 11, so when it is coupled to the rotation shaft of the motor, after inserting the fastening body 11 of the gear 10 to the rotation shaft, the fastening body ( 11) by inserting a bolt into the bolt hole (13) formed in) to couple the gear to the rotating shaft,

The gear 10 is to process a cylindrical metal material, and the cylindrical material is divided into upper and lower parts so that the diameter of the lower end is smaller than the diameter of the upper end, and the upper end of the material is formed with the gear teeth 12 Formed and processed to form a hexagonal star, process the insertion hole through the top and bottom of the material to insert the rotational shaft of the motor, form a hole in the outer periphery of the lower end of the material, and form a screw surface in the inner diameter of the hole. To make gears,

The circular plate 20 to which the gear 10 is coupled has a coupling hole 21 formed at the center to correspond to the shape of the gear teeth 12 formed on the outer periphery of the gear 10, and the circular plate 20 is a disk It has a shape, but a plurality of protruding jaws 22 are radially formed at the ends, and the protruding jaws 22 are coupled to a rotating plate 32 coupled to the cover 30, and the rotating plate 32 has A coupling hole is formed so that a plurality of protruding protrusions 22 formed on the circular plate 20 can be inserted and coupled,

When the gear 10 rotates together with the rotation shaft by being coupled to the rotation shaft of the motor, the gear 10 rotates the circular plate 20, and the circular plate 20 is coupled to the rotation plate 32 of the motor, The rotation plate 32 also rotates together, and as the rotation plate 32 rotates, the power transmission shaft 40 coupled to the rotation plate 32 also rotates,

The coupling hole 21 formed in the circular plate 20 is formed in a hexagonal star shape, and its cross section is “
The gear 10 is formed in a shape, and the gear teeth 12 are inserted into the coupling hole 21 of the circular plate 20 to transmit power, but the gear teeth 12 and the circular plate of the gear 10 The coupling holes 21 of (20) are formed at intervals of 0.5 to 2 mm with a clearance space between each other, and when the gear 10 rotating by the rotation shaft of the motor rotates by the motor, vibration of the motor and transmission from the working part Even if vibration occurs due to external shock, it is possible to prevent loss of the transmitted power due to the clearance space between the gear teeth 12 and the circular plate 20,

The gear teeth 12 are formed to have a certain thickness in the longitudinal direction of the fastening body 11 of the gear 10, and the circular plate 20 has a thickness of 1/2 to 1/of the thickness of the gear teeth 12 It is formed to a thickness of 5, and even if the length of the rotation shaft of the motor is different, the thickness of the gear teeth 12 of the gear 10 coupled to the rotation shaft is thicker than that of the circular plate 20, so that power can be easily transmitted to each other, When the gear 10 transmits power to the circular plate 20, it is possible to adjust the straightness, concentricity and advance angle,

The circular plate 20 is made of a metal material or a synthetic resin material, and the circular plate 20 is shaped by forming a coupling hole 21 in the center of the circular plate 20 by a press, and the circular plate 20 is formed by the press. Protruding jaws 22 are formed on both sides during processing, and the protruding jaws 22 are bent by 90° using a hand tool by the operator,

In the method of manufacturing the cover 30, first, a rotating plate 32 is manufactured, and the first step of manufacturing the rotating plate 32 is provided with a circular plate-shaped material,

The second step is to form a semi-finished product of the rotating plate 32 by processing the material of the circular plate with a press 400, and the semi-finished product of the rotating plate 32 processed with the press 400 is formed in a cylindrical shape with an open top. A circular hole is formed on the lower surface of the semi-finished product of the rotating plate 32, and the press 400 is composed of a lower die 410 and an upper die 420, and the lower die 410 has a cylindrical shape on the upper surface. A mounting groove 411 is formed, a circular circular hole 412 is formed on an inner bottom surface of the mounting groove 411, and the upper die 420 has a first pressing protrusion 421 having a cylindrical shape on the bottom surface. Is formed, and a cylindrical second pressing protrusion is formed on a lower surface of the first pressing protrusion 421, and the diameter of the seating groove 411 formed in the lower die 410 is the first pressing protrusion formed on the upper die ( When the diameter is formed larger than 421, the first pressing protrusion 421 is inserted into the seating groove 411, and the first pressing protrusion 421 is inserted into the seating groove 411, the first pressing protrusion A second pressing protrusion formed on the lower surface of 421 is inserted into the circular hole 412 formed on the inner lower surface of the seating groove 411, and the second pressing protrusion and the circular hole 412 are formed to have the same diameter, and press The rotating plate formed by is formed in a cylindrical shape with an open top surface, but a circular hole 412 is formed on the inner surface thereof,

The third step is to form a pair of circular arc-shaped circular holes 412 around the circular hole 412 of the semi-finished product of the rotating plate 32 to form a rotating plate 32 as a finished product, and the rotating plate 32 is a semi-finished product. The arc hole 412 formed in is formed by a punching machine,

Secondly, the cover body is molded into a mold,

Thirdly, by molding the power transmission shaft into a mold, the power transmission shaft 40 is formed in a cylindrical shape, the rear diameter is formed larger than the front diameter, and a screw surface is formed in the front of the power transmission shaft 40 And forming a snap ring insertion groove 41 at the outer periphery of the power transmission shaft 40,

Fourth, by combining the cover body, the rotation plate and the power transmission shaft, a ring-shaped bearing is installed inside the cover body 31, and a rotation plate 32 is placed at the rear of the bearing, and the rotation plate The opened part of (32) is placed so as to face the outside while being coupled to the cover body (31), and the bearing is fixedly coupled to the cover body (31) in a state coupled to the power transmission shaft (40), and the cover body (31), the power transmission shaft is forcibly coupled to penetrate the bearing and the rotation plate 32, but is coupled by a punching machine, and the rotation plate 32 and the power transmission shaft 40 are coupled by welding so that they are not separated, and the The snap ring 42 is coupled to the snap ring insertion groove 41 formed on the outer periphery of the power transmission shaft 40, and the snap ring insertion groove 41 formed on the power transmission shaft 40 is located in front of the place where the bearing is placed. Is formed, and after the power transmission shaft 40 passes through the bearing, the snap ring 42 is coupled to the snap ring insertion groove 41, and the bearing coupled to the power transmission shaft 40 is separated by the snap ring 42 The rechargeable water pump, characterized in that the rotating plate 32 and the power transmission shaft 40 are rotatably installed while being coupled to the cover body 31