KR-20260065842-A - water pump

Abstract

The present invention relates to a water pump comprising: a can including a shaft support portion that rotatably accommodates a rotor and supports a rotor shaft; a motor housing that accommodates the can and a stator; a pin disposed on one axial side of the shaft support portion and key-coupled with the rotor shaft according to axial movement; and a control housing detachably coupled to one axial side of the motor housing and having a pin receiving groove formed therein to accommodate the pin in a reciprocating manner, thereby having the effect of relieving sticking caused by foreign matter by a tool pressing the pin to rotate the rotor shaft.

Inventors

• 김주곤
• 문종현
• 송창석
• 서준범

Assignees

• 엘지전자 주식회사

Dates

Publication Date

20260511

Application Date

20241101

Claims (20)

1. A can comprising a shaft support that rotatably accommodates a rotor and supports a rotor shaft; A motor housing in which the above-mentioned can and stator are disposed inside; A control unit housing coupled to one side in the axial direction of the motor housing; and A pin disposed in the control unit housing and moving along the axial direction when an external force is applied, and key-coupled with the rotor shaft; Includes, The above control unit housing is, Control unit housing body; and A pin receiving groove formed on the motor housing direction surface of the control unit housing body and receiving the pin; Includes, A water pump characterized in that at least a portion of the above pin is supported in the above pin receiving groove.
2. In paragraph 1, The above control unit housing is, A tool insertion hole formed on the side opposite the pin receiving groove of the control unit housing body and communicating with the pin receiving groove; A water pump that further includes.
3. In paragraph 1, A spring disposed in the pin receiving groove and applying a restoring force against the axial movement of the pin; A water pump that further includes.
4. In paragraph 1, A water pump characterized in that, when the control unit housing is separated from the motor housing, the pin receiving groove is exposed to the outside.
5. In paragraph 2, A water pump characterized in that the inner diameter of the tool insertion hole is smaller than the inner diameter of the pin receiving groove.
6. In paragraph 1, The above motor housing is, A pin guide portion in which at least a portion of the above pin is movably coupled; Includes, The above pin is, A water pump characterized by reciprocating axially along the above-mentioned pin guide.
7. In paragraph 6, A water pump characterized in that when the control unit housing and the motor housing are combined, at least a portion of the pin guide portion is disposed inside the pin receiving groove, and at least a portion of the pin is inserted inside the pin guide portion.
8. In paragraph 6, A water pump characterized in that the outer diameter of the pin guide portion is smaller than the inner diameter of the pin receiving groove.
9. In paragraph 1, The above pin is, A head portion having a tool coupling groove formed therein to which at least a portion of the tool is coupled; A plunger portion extending along the axial direction from the head portion and formed with a smaller diameter than the head portion to be inserted into the motor housing; and A key portion coupled to the rotor shaft above; A water pump including
10. In Paragraph 9, An O-ring that seals the outer surface of the plunger portion and the motor housing; A water pump that further includes.
11. In paragraph 1, A bearing portion disposed between the shaft support portion and the rotor shaft; A water pump that further includes.
12. In Paragraph 11, A bushing supporting the space between the shaft support and the bearing; A water pump that further includes.
13. In paragraph 1, A water pump characterized in that when an external force is applied to the pin, the pin is coupled with the rotor shaft and rotates together.
14. In paragraph 1, The above can is, A pin guide portion extending from the shaft support portion and movably coupled to at least a portion of the pin; A water pump including
15. In Paragraph 14, The above pin guide part is, A water pump characterized by having an inner surface formed in stages.
16. In Paragraph 14, The above pin guide part is, A first part that accommodates a bearing part and the rotor shaft inside; A second part having a reduced inner diameter compared to the first part and accommodating the rotor shaft; and A third part having a reduced inner diameter compared to the second part and accommodating at least a portion of the pin; A water pump including
17. A can comprising a shaft support that rotatably accommodates a rotor and supports a rotor shaft; A motor housing in which the above-mentioned can and stator are disposed inside; A control unit housing coupled to one side in the axial direction of the above motor housing; A pin disposed in the control unit housing and moving along the axial direction to be key-coupled with the rotor shaft when an external force is applied; and A pin guide portion in which at least a portion of the above pin is movably coupled; Includes, The above pin is, A water pump characterized by reciprocating axially along the above-mentioned pin guide.
18. In Paragraph 17, The above control unit housing is, Control unit housing body; and A pin receiving groove formed on the motor housing direction surface of the control unit housing body and receiving the pin; Includes, A water pump characterized in that when the control unit housing and the motor housing are combined, at least a portion of the pin guide portion is disposed inside the pin receiving groove, and at least a portion of the pin is inserted inside the pin guide portion.
19. In Paragraph 17, The above control unit housing is, Control unit housing body; and A pin receiving groove formed on the motor housing direction surface of the control unit housing body and receiving the pin; Includes, A water pump characterized in that the outer diameter of the pin guide portion is smaller than the inner diameter of the pin receiving groove.
20. In Paragraph 17, The above pin guide part is, A water pump characterized by being formed to protrude from the control unit housing direction surface of the motor housing.

Description

Water pump The present invention relates to a water pump, and more specifically, to a water pump capable of removing sticking by applying an external force when sticking occurs due to foreign substances remaining in a liquid. A water pump is a device used to flow liquid or increase the pressure of a liquid. Generally, water pumps utilize centrifugal force, where a rotating impeller pushes liquid radially outward from the center of the pump. The centrifugal force generated by the rotation of the impeller provides the fluid force that moves the liquid from the pump's inlet to the outlet. During this process, the velocity of the liquid increases, and high-pressure liquid can be generated. Meanwhile, electric water pumps that use an electric motor to provide rotational force for the impeller are widely used. Electric water pumps rotate the rotor using the electromagnetic force between the rotor and the stator, and the rotor shaft and the impeller rotate together to generate centrifugal force. However, failures may occur in the water pump described above depending on the operating environment. Specifically, water pumps used for hot water circulation are used intensively during the cold winter months, while usage tends to decrease significantly during the summer. In addition, if the water contains foreign substances such as lime, the water may evaporate and the lime may harden when not in use. If such foreign substances adhere between the rotor shaft and the water pump housing, the shaft may fail to rotate even when power is applied to the water pump. In this regard, European registered patent EP 2808547B1 discloses a pump device capable of deblocking the shaft of a rotor. The above pump device is equipped with a pin at one axial end of a can containing a rotor, and when the pin is pressed and rotated with a tool, it engages with the shaft of the rotor and rotates together, thereby relieving the sticking. However, the above pump device has a limitation in that the number of parts increases because it must be equipped with a separate housing for guiding the axial reciprocating movement of the pin and a separate housing for sealing the pin. In addition, there is a limitation in that additional processes, such as welding, are required to secure the cans and housings. Meanwhile, European registered patent EP 3379084B1 discloses a hydraulic pump in which a pin is provided inside a can and can be relieved of sticking through the rotation of the pin. However, the above pump has a limitation in that both the pin and the spring are placed inside the can, and since the spring elastically supports the space between the bearing and the pin, both the spring and the bearing can move when an external force is applied, resulting in structural instability. In addition, since the motor must be mounted after the pin is assembled inside the can and the spring is assembled, the assembly process is complex and there is a limitation in that the preload applied to the spring becomes unstable due to assembly errors. FIG. 1 is a perspective view for explaining a water pump according to one embodiment of the present invention. Figure 2 is an exploded perspective view of Figure 1. Figure 3 is a cross-sectional view of Figure 1. FIG. 4 is a perspective view for explaining a motor housing in a water pump according to one embodiment of the present invention. FIG. 5 is a perspective view illustrating a control unit housing in a water pump according to one embodiment of the present invention. Fig. 6 is a perspective view of Fig. 5 seen from a different direction. FIG. 7 is a perspective view illustrating a pin in a water pump according to one embodiment of the present invention. Fig. 8 is a bottom view of Fig. 7. FIG. 9 is a cross-sectional view illustrating the case where a pin is pressurized in a water pump according to one embodiment of the present invention. FIG. 10 is a cross-sectional view illustrating a water pump according to another embodiment of the present invention. Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings. The present invention is capable of various modifications and may have various embodiments, and specific embodiments are illustrated in the drawings and described in detail in the detailed description. This is not intended to limit the present invention to specific embodiments, and should be interpreted to include all modifications, equivalents, and substitutions that fall within the spirit and scope of the invention. In describing the present invention, terms such as "first," "second," etc., may be used to describe various components, but said components may not be limited by said terms. Such terms are used solely for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named the second component, and similarly, the second component may be named the