KR20110055297A - Engine that is provided with water pump - Google Patents

Abstract

PURPOSE: A water pump with an impeller is provided to enable easy assembling since the rotor unit of a driving motor is integrated into an impeller. CONSTITUTION: A water pump with an impeller comprises a fixed shaft(230), a rotor unit(220), an impeller(200), a stator unit(210), and a driver(120a). The fixed shaft is mounted in a motor housing(110). The rotor unit is rotatably mounted on the outer circumferential surface of the fixed shaft. The impeller is formed on the other end of the fixed shaft along with the rotor unit. The stator unit faces the rotor unit and is arranged in the motor housing. The driver supplies power to the stator and rotor units. The driver is installed in an driver case(120) to rotate the rotor and the impeller.

Description

Water pump with impeller {ENGINE THAT IS PROVIDED WITH WATER PUMP}

The present invention relates to a water pump having an impeller, and more particularly, to a water pump having an impeller for circulating coolant to efficiently cool an engine.

In general, the engine requires a cooling system. If there is no cooling system, the parts will not work normally due to high heat.

The cooling system includes a water jacket, a thermostat, a water pump, a radiator, a cap, a fan, a fan belt, a coolant hose, and the like.

Generally, the water pump does not have its own driving force. Therefore, the water pump is operated by receiving the kinetic energy of the crankshaft of the engine.

When the engine is started, the water pump is operated regardless of the coolant temperature or the operating conditions of the engine, and the coolant circulates in the engine or the radiator.

As the coolant is forced to circulate before the engine warms up, the temperature of the exhaust gases also rises slowly. On the other hand, in order to improve the purification efficiency of the exhaust gas, the temperature of the exhaust gas should be a suitable high temperature (for example, 250 ℃).

In recent years, in order to warm up an engine quickly and to reduce fuel consumption, the motor-driven water pump is attached.

On the other hand, the motor-driven water pump includes a rotor unit and a stator unit, the impeller is mounted separately from the rotor unit, there is a problem that the assembly structure and the sealing structure is complicated. In addition, in recent years, motor-driven water pumps that are easy to assemble and have fewer parts have been continuously studied.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a water pump having an impeller having a simple structure and easy assembly.

Water pump equipped with an impeller according to the present invention for achieving this object, a fixed shaft fixed to one end thereof is fixed to the inside of the motor housing, a rotor unit rotatably mounted on the outer peripheral surface of the fixed shaft, the rotor An impeller formed integrally with the unit at the other end of the fixed shaft, the stator unit fixedly disposed inside the motor housing in correspondence with the rotating rotor unit, and the rotor by supplying electricity to the stator unit or the rotor unit. And a driver provided in the driver case to rotate the impeller.

A driver case mounted to the rear of the motor housing; The driver case further includes a rear cover that covers the rear of the motor housing, and one end of the fixed shaft is inserted into and fixed to the center of the rear cover.

The motor housing is disposed on the opposite side of the rear cover and integrally formed to cover the front, and is disposed along the rotating rotor unit and is formed between the fixed shaft and the rotor, wherein the front cover and It includes an inner cover formed integrally.

It further comprises an impeller housing mounted to the front cover to the built impeller.

An O-ring is interposed between one surface of the rear end of the inner cover and one surface of the rear cover to form a sealing structure.

The stator unit is fixed to the inner side of the inner cover.

It includes a connecting body for connecting the impeller and the rotor unit integrally, the connecting body is disposed through the central through hole of the front cover.

As described above, according to the water pump having the impeller according to the present invention, the assembly structure is simplified by integrally forming the rotor unit and the impeller of the drive motor.

In addition, by integrally forming the rotor unit and the impeller, the number of parts is reduced by using a bearing having one integral structure.

In addition, by simplifying the sealing structure between the rotor unit and the stator unit, assembly is easy and the number of parts is reduced.

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

1 is a perspective view of a water pump having an impeller according to an embodiment of the present invention.

Referring to FIG. 1, the water pump 100 includes a motor housing 110, a driver case 120, an impeller housing 130, and a bracket 140.

A stator, a rotor, and a drive shaft, which are components of an electric motor, are provided in the motor housing 110, and an electric supply set is installed in the driver case 120 to supply electricity to the stator or the rotor.

An impeller is provided in the impeller housing 130, and the impeller housing 130 is formed with an inlet 142 for sucking the coolant and a supply port 144 for supplying the coolant, respectively.

The bracket 140 is formed on one side of the outer circumferential surface of the motor housing 110, and the water pump 100 is mounted to the cylinder block of the engine by using the bracket 140.

The bush 150 is interposed between the bracket 140 and one surface of the cylinder block, and the fixing bolt 180 penetrates through the bracket 140, the bush 150, and the cylinder block 160. A nut 170 is mounted to firmly fix the water pump 100 to the cylinder block 160.

The bush 150 firmly fixes the water pump 100 to the cylinder block, and has a structure for absorbing vibration generated between the water pump 100 and the cylinder block.

2 is a cross-sectional view of a water pump having an impeller according to an embodiment of the present invention.

Referring to FIG. 2, the water pump 100 includes the motor housing 110 forming an outer shape, the driver case 120 mounted on the rear of the motor housing, and the impeller housing mounted on the front of the motor housing. 130.

A fixed shaft 230 is disposed in the center of the motor housing 110, and one end of the fixed shaft 230 is fixed to the driver case 120.

More specifically, the driver case 120 includes a rear cover 120b disposed at the rear center of the motor housing 110 to cover the rear opening, and one end of the fixed shaft 230 is It is inserted into and fixed to the center of the rear cover 120b.

In more detail, the driver case 120 includes a rear cover 120b disposed on an opposite side of the impeller housing 130, and the motor housing 110 includes the impeller opposite to the rear cover 120b. It includes a front cover (110a) formed adjacent to the 200.

Here, the front cover 110a is formed integrally with the motor housing 100. The impeller housing 130 is mounted at the front of the front cover 110a.

Here, one end of the fixed shaft 230 is inserted into the rear cover 120b and fixed. The rear cover 120b preferably has a thickness t set to firmly fix one end of the fixed shaft 230.

In the embodiment of the present invention, the rotor free 220 is disposed along the outer circumferential surface of the fixed shaft 230, the rotor unit 220 has a structure to rotate on the fixed shaft 230.

As shown, a bearing 240 is interposed between the rotor unit 220 and the outer circumferential surface of the fixed shaft 230. The bearing 240 has a single structure in a cylindrical shape long in the longitudinal direction of the fixed shaft 230. In addition, the rotor unit 220 may be rotated at a high speed on the fixed shaft 230 by the bearing 240.

An impeller 200 is disposed at the other end of the fixed shaft 230, and a rotation center of the impeller 200 is disposed to coincide with a central axis of the fixed shaft 230.

In an embodiment of the present invention, the impeller 200 is integrally formed with the rotor unit 220. More specifically, the rotor unit 220 and the impeller 200 are integrally formed through the connection body 280.

The connecting body 280 is disposed through the through-hole 115 of the front cover 110a of the motor housing 110, the impeller 200 is integrally connected to the front end portion thereof, the center of the rotation The electronic unit 220 is disposed.

The other end of the fixed shaft 230 is mounted to the shaft bolt 270 through a central hole 202 formed in the center of the impeller 200 and the connecting body 280, the shaft bolt 270 is the The bearing 240 is firmly supported.

In addition, a thrust plate 260 is disposed on the outer circumferential surface of the fixed shaft 230 on the opposite side of the shaft bolt 270 to firmly support the bearing 240 in the longitudinal direction of the fixed shaft 230.

In FIG. 2, the thrust plate 260 supports the bearing 240 in the left direction, and the shaft bolt 270 supports the bearing 240 in the right direction.

In the embodiment of the present invention, the rotor unit 220 is continuously disposed in the circumferential direction of the fixed shaft 230, the stator inside the motor housing 110 corresponding to the rotor unit 220 The unit 210 is fixedly arranged.

Here, the stator unit 210 is preferably disposed continuously in the rotation direction of the rotor unit 220.

2, an inner cover is formed between the stator unit and the rotor unit.

The inner cover 110b extends from the front cover 110a, and an end thereof is in close contact with one surface of the rear cover 120b. An o-ring 250 is interposed between one surface of the rear cover 120b and an end surface of the inner cover 110b.

The O-ring 250 is interposed in the direction of rotation of the rotor unit 220 between one side surface of the rear cover 120b and the end surface of the inner cover 110b, the O-ring 250 is the rotor The space 290a of the unit 220 and the space 290b of the stator unit 210 are sealed to each other.

In order for the rotor unit 220 to rotate smoothly, the inner surface of the inner cover 110b is disposed at a predetermined interval from the rotor unit 220, the inner side opposite the rotor unit 220 The stator unit 210 is fixedly disposed on the outer surface of the cover 110b.

In the embodiment of the present invention, the inner cover 110b has a cylindrical structure because it is continuously disposed in the rotational direction of the rotor unit 220. In addition, the entire outer shape of the motor housing 110 is preferably formed in a cylindrical shape.

The driver 120a is built into the driver case 120, and the driver 120a receives power from the outside and supplies electricity to the stator unit 210 or the rotor unit 220 to supply the rotor. The unit 220 and the impeller 200 are rotated at a set speed under a set condition.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and easily changed and equalized by those skilled in the art from the embodiments of the present invention. It includes all changes to the extent deemed acceptable.

1 is a perspective view of a water pump having an impeller according to an embodiment of the present invention.

2 is a cross-sectional view of a water pump having an impeller according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

100: water pump

110: motor housing

115: through hole

110a: front cover

110b: inner cover

120: driver case

120a: driver

120b: rear cover

130: impeller housing

140: bracket

142: inlet

144: supply port

150: bush

160: cylinder block

170: nut

180: bolt

200: impeller

210: stator unit

202: center hall

220: rotor unit

230: fixed shaft

240: bearing

250: O-ring

260 thrust plate

270 shaft bolt

280: connecting body

290a: rotor unit space

290b: stator unit space

Claims (7)

A fixed shaft mounted inside the motor housing and having one end fixed thereto; A rotor unit rotatably mounted on an outer circumferential surface of the fixed shaft; An impeller integral with the rotor unit and formed at the other end of the fixed shaft; A stator unit fixedly disposed inside the motor housing in correspondence with the rotating rotor unit; And A driver provided in the driver case to supply electricity to the stator unit or the rotor unit to rotate the rotor and the impeller; Water pump having an impeller comprising a. In claim 1, A driver case mounted to the rear of the motor housing; More, The driver case, A rear cover covering a rear of the motor housing; Including, One end of the fixed shaft is inserted into the center of the rear cover is fixed to the water pump having an impeller. 3. The method of claim 2, The motor housing, A front cover disposed integrally with the rear cover and integrally formed to cover the front side; And An inner cover disposed along the rotating rotor unit and formed between the fixed shaft and the rotor and integrally formed with the front cover; Water pump having an impeller comprising a. 4. The method of claim 3, An impeller housing mounted to the front cover to embed the impeller; Water pump having an impeller further comprising. 4. The method of claim 3, The water pump having an impeller, characterized in that the sealing ring structure is formed between the one surface of the rear end of the inner cover and one surface of the rear cover. 4. The method of claim 3, The water pump having an impeller, characterized in that the stator unit is fixed to the inner surface of the inner cover. 4. The method of claim 3, And a connecting body for integrally connecting the impeller and the rotor unit, wherein the connecting body is disposed through the central through hole of the front cover.

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