Water pump

Abstract

The present invention relates to a water pump comprising: a can in which a rotor is rotatably accommodated and which includes a shaft support unit on which a rotor shaft is supported; a motor housing in which the can and a stator are accommodated; a pin which is disposed on one side of the shaft support unit in an axial direction thereof and moves in the axial direction to be key-coupled with the rotor shaft; and a control unit housing detachably coupled to one side of the motor housing in the axial direction and having a pin accommodating groove in which the pin is accommodated and can move back and forth. The rotor shaft can be rotated by pressing the pin using a tool, thereby removing foreign substances adhered to the pump.

Description

water pump

[0001] 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.

[0002]

[0003] A water pump is a device used to flow liquid or increase the pressure of a liquid.

[0004] 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.

[0005] Meanwhile, electric water pumps that use an electric motor to provide rotational force to 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.

[0006] 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.

[0007] In this regard, European registered patent EP 2808547B1 discloses a pump device capable of deblocking the shaft of a rotor.

[0008] 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.

[0009] 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.

[0010] In addition, there is a limitation in that additional processes, such as welding, are required to secure the cans and housings.

[0011] 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.

[0012] 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.

[0013] 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.

[0014]

[0015] The present invention was created to improve upon the problems of conventional water pumps as described above, and aims to provide a water pump capable of resolving shaft seizure caused by foreign substances contained in the liquid.

[0016] In addition, the purpose is to provide a water pump that allows for easy insertion of a tool to resolve shaft seizing.

[0017] In addition, the purpose is to provide a water pump in which parts that resolve seizing can be uniformly assembled in a simple manner.

[0018] In addition, the purpose is to provide a water pump that can prevent damage to the part that relieves seizing due to liquid leakage.

[0019]

[0020] To achieve the above-mentioned purpose, the water pump according to the present invention comprises: a can including a shaft support portion in which a rotor is rotatably accommodated and a rotor shaft is supported; a motor housing in which the can and a 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 which moves along the axial direction and is key-coupled with the rotor shaft when an external force is applied.

[0021] At this time, the control unit housing may include: a control unit housing body; a pin receiving groove formed on the motor housing direction surface of the control unit housing body and receiving the pin; and 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.

[0022] Accordingly, when the control unit housing is separated from the motor housing, the pin receiving groove may be exposed to the outside.

[0023] At this time, the inner diameter of the tool insertion hole may be smaller than the inner diameter of the pin receiving groove.

[0024] In addition, the water pump according to the present invention may further include a spring disposed in the pin receiving groove and applying a restoring force against the axial movement of the pin.

[0025] Meanwhile, the motor housing includes a pin guide portion to which at least a portion of the pin is movably coupled; and the pin can reciprocate in the axial direction along the pin guide portion.

[0026] At this time, the pin guide portion may be formed to protrude from the surface of the motor housing in the direction of the control unit housing.

[0027] At this time, the inner diameter of the pin guide portion may be smaller than the outer diameter of the rotor shaft.

[0028] In addition, the inner diameter of the pin guide portion may be smaller than the inner diameter of the bearing portion.

[0029] Accordingly, 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 can be inserted inside the pin guide portion.

[0030] Meanwhile, the outer diameter of the pin guide portion may be smaller than the inner diameter of the pin receiving groove.

[0031] Accordingly, when the control unit housing and the motor housing are combined, the pin guide portion is disposed on the radial outer side of at least a portion of the pin, and at least a portion of the pin receiving groove can be disposed on the radial outer side of at least a portion of the pin guide portion.

[0032] In addition, the above spring may have at least a portion of the pin guide portion disposed inside and at least a portion of the pin receiving groove disposed outside.

[0033] In addition, the water pump according to the present invention may further include a bearing portion disposed between the shaft support portion and the rotor shaft.

[0034] In addition, the water pump according to the present invention may further include a bushing that supports the space between the shaft support and the bearing.

[0035] At this time, the pin may include: 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 diameter smaller than that of the head portion to be inserted into the motor housing; and a key portion coupled to the rotor shaft.

[0036] In addition, it may further include an O-ring that seals the outer surface of the plunger portion and the motor housing.

[0037] Through this, the O-ring is double-sealed together with the sealing part, preventing the liquid from flowing toward the control unit housing.

[0038] Meanwhile, in another embodiment of the present invention, the can may include a pin guide portion that is extended from the shaft support portion and to which at least a portion of the pin is movably coupled.

[0039] At this time, the pin guide portion may be formed with an inner surface that forms a step.

[0040] That is, the pin guide portion may include: a first portion that accommodates a bearing portion and the rotor shaft inside; a second portion that accommodates the rotor shaft and has an inner diameter reduced from that of the first portion; and a third portion that accommodates at least a portion of the pin and has an inner diameter reduced from that of the second portion.

[0041] Through this, there is an advantage in being able to provide a sealing effect even without a sealing part.

[0042]

[0043] As explained above, according to the water pump of the present invention, a tool can be inserted through a tool insertion hole formed in the control unit housing, and the tool presses the pin to rotate the rotor shaft, thereby relieving sticking caused by foreign matter.

[0044] In addition, since the pin receiving groove is formed in the control unit housing rather than the motor housing, the pin can be assembled through a simple process of inserting the pin into the control unit housing and then joining the control unit housing and the motor housing.

[0045] In addition, an O-ring is coupled between the pin and the motor housing, and a sealing part is provided between the can and the rotor shaft, which has the effect of preventing liquid leakage.

[0046]

[0047] FIG. 1 is a perspective view for explaining a water pump according to one embodiment of the present invention.

[0048] Figure 2 is an exploded perspective view of Figure 1.

[0049] Figure 3 is a cross-sectional view of Figure 1.

[0050] FIG. 4 is a perspective view for explaining a motor housing in a water pump according to one embodiment of the present invention.

[0051] FIG. 5 is a perspective view illustrating a control unit housing in a water pump according to one embodiment of the present invention.

[0052] Fig. 6 is a perspective view of Fig. 5 seen from a different direction.

[0053] FIG. 7 is a perspective view illustrating a pin in a water pump according to one embodiment of the present invention.

[0054] Fig. 8 is a bottom view of Fig. 7.

[0055] 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.

[0056] FIG. 10 is a cross-sectional view illustrating a water pump according to another embodiment of the present invention.

[0057]

[0058] Preferred embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0059] 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.

[0060] 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 first component.

[0061] The term "and / or" may include a combination of multiple related listed items or any of the multiple related listed items.

[0062] When it is stated that one component is "connected" or "connected" to another component, it can be understood that while it may be directly connected or connected to that other component, there may also be other components in between. On the other hand, when it is stated that one component is "directly connected" or "directly connected" to another component, it can be understood that there are no other components in between.

[0063] The terms used in this application are used merely to describe specific embodiments and are not intended to limit the invention. Singular expressions may include plural expressions unless the context clearly indicates otherwise.

[0064] In this application, terms such as “comprising” or “having” are intended to indicate the existence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not excluding in advance the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0065] Unless otherwise defined, all terms used herein, including technical or scientific terms, may have the same meaning as generally understood by those skilled in the art to which the present invention pertains. Terms such as those defined in commonly used dictionaries may be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and may not be interpreted in an ideal or overly formal sense unless explicitly defined in this application.

[0066] In addition, the following embodiments are provided to explain more completely to those with average knowledge in the industry, and the shapes and sizes of the elements in the drawings may be exaggerated for clearer explanation.

[0067]

[0068] FIG. 1 shows a perspective view for explaining a water pump according to one embodiment of the present invention, FIG. 2 shows an exploded perspective view of FIG. 1, FIG. 3 shows a cross-sectional view of FIG. 1, and FIG. 4 shows a perspective view for explaining a motor housing in a water pump according to one embodiment of the present invention.

[0069] A water pump (1) according to one embodiment of the present invention is described as follows with reference to FIGS. 1 to 4.

[0070] A water pump (1) according to one embodiment of the present invention includes a motor part (100), a pumping part (200), a control part (300), and a deblocking part (400).

[0071] A control unit (300) is disposed on one side of the axial direction of the motor unit (100), a pumping unit (200) is disposed on the other side of the axial direction of the motor unit (100), and a deblocking unit (400) can be disposed in the space formed by combining the motor unit (100) and the control unit (300).

[0072] For convenience, the direction in which the pumping unit (200) is positioned relative to the motor unit (100) may be called the upper side, and the direction in which the control unit (300) is positioned may be called the lower side. Specifically, the direction in which the pumping unit (200) is positioned relative to the longitudinal direction of the rotor shaft (141) may be called the upper side, and the direction in which the control unit (300) is positioned may be called the lower side.

[0073]

[0074] The motor unit (100) can be combined with the pumping unit (200) to provide rotational force to the pumping unit (200).

[0075] The motor unit (100) includes a motor housing (110), a stator (120), a can (130), and a rotor (140).

[0076] The motor housing (110) can form the exterior of the motor part (100). For example, the motor housing (110) can be formed in the shape of a roughly square block.

[0077] The motor housing (110) may accommodate a stator (120) inside. Specifically, the motor housing (110) may include an outer wall (111) and an inner wall (112). For example, the outer wall (111) may be formed in the shape of a roughly square tube, and a cylindrical inner wall (112) may be formed on the inner side of the outer wall (111). Additionally, one side in the longitudinal direction of the outer wall (111) and the inner wall (112) may be connected to a base (113), and the other side in the longitudinal direction of the outer wall (111) and the inner wall (112) may be covered by a cover (114). At this time, the stator (120) may be placed in the space between the outer wall (111) and the inner wall (112). Additionally, a can (130) may be placed in the inner space of the inner wall (112).

[0078] Meanwhile, according to an embodiment, the motor housing (110) may further include a pin guide portion (115). At least a portion of the pin (410) may be movably coupled to the pin guide portion (115).

[0079] The pin guide portion (115) may be formed by bending and extending downward from the base (113) of the motor housing (110). The pin guide portion (115) may be formed by extending from the center of the base (113) toward the control portion (300), and may be formed in a cylindrical shape.

[0080] At this time, the outer diameter of the pin guide portion (115) may be smaller than the inner diameter of the pin receiving groove (312) to be described later. Accordingly, when the control unit housing (310) and the motor housing (110) are combined, at least a portion of the pin guide portion (115) is placed inside the pin receiving groove (312), and at least a portion of the pin (410) can be inserted inside the pin guide portion (115).

[0081] Accordingly, the pin (410) can be reciprocated axially along the pin guide (115).

[0082] The stator (120) is fixedly coupled to the motor housing (110) and can rotate the rotor (140), which will be described later, by receiving power and using electromagnetic force. At this time, various types of known electric motors may be applied to the stator (120) and the rotor (140), and a detailed description is omitted.

[0083] Meanwhile, a can (130) is attached to the motor housing (110). The can (130) can be attached to the radially inner side of the inner wall (112).

[0084] The can (130) can rotatably accommodate the rotor (140). The can (130) can support the rotor shaft (141).

[0085] The can (130) includes a can body (131), a shaft support (132), and a bearing part (133).

[0086] The can body (131) may be formed to accommodate a rotor (140) inside. For example, the can body (131) may be formed in a cylindrical shape. At this time, a shaft support (132) is formed at one axial end (lower end) of the can body (131), and the other axial end (upper end) of the can body (131) may be coupled to the other axial end of the motor housing (110). Specifically, the other axial end of the can body (131) may be formed to be bent outward in a radial direction to cover the upper side of the cover (114) of the motor housing (110). Through this, the coupling force between the can (130) and the motor housing (110) can be strengthened, and there is an advantage in that the coupling force can be maintained even if rotational vibration of the rotor (140) occurs.

[0087] Additionally, the shaft support (132) can be formed by bending and extending radially inward from one axial end (lower end) of the can body (131), and then bending and extending toward the control unit (300). That is, the shaft support (132) can be formed to form a step with the can body (131) at one axial end of the can body (131). At this time, the can body (131) can be formed with a larger diameter than the shaft support (132).

[0088] The shaft support (132) can accommodate a rotor shaft (141) and a bearing part (133) inside.

[0089] At least a portion of the rotor shaft (141) can be accommodated at the radial center of the shaft support (132).

[0090] Meanwhile, a bearing portion (133) may be coupled to the outer surface of the rotor shaft (141). That is, the bearing portion (133) is coupled to the radial inner side of the shaft support portion (132), and the axial other side of the rotor shaft (141) may be coupled through the radial center of the bearing portion (133). Through this, one axial side of the rotor shaft (141) can be supported.

[0091] The bearing portion (133) is positioned between the shaft support portion (132) and the rotor shaft (141) to reduce the frictional force generated during rotation of the rotor shaft (141).

[0092] Meanwhile, according to an embodiment, the can (130) may further include a bushing (134).

[0093] The bushing (134) can support the space between the shaft support (132) and the bearing portion (133). The bushing (134) can compensate for the weakening of the support force of the bearing portion (133) due to the difference in thermal expansion rates between the shaft support (132) and the bearing portion (133). For example, the bushing (134) can be formed from brass.

[0094] Meanwhile, a bearing portion (133) may be attached to the outer surface of the rotor shaft (141). Additionally, a bushing (134) may be disposed on the outer surface of the bearing portion (133). That is, the bushing (134) is attached to the radially inner side of the shaft support portion (132), the bearing portion (133) is attached to the radially inner side of the bushing (134), and the other axial side of the rotor shaft (141) may be connected through the radial center of the bearing portion (133). Through this, one axial side of the rotor shaft (141) can be supported.

[0095] Meanwhile, the can (130) may further include a can cover (136). The can cover (136) may cover the axial other side (upper side) end of the can body (131). For example, the can cover (136) may be formed in the shape of a hollow disc. At this time, a radially inner part of the can cover (136) may cover the axial other side of the rotor (140), and a radially outer part of the can cover (114) of the motor housing (110). That is, the can cover (136) may be placed between the motor housing (110) and the pumping unit housing (210) of the pumping unit (200) to be described later.

[0096] At this time, a bearing (136a) may be attached to the radial center of the can cover (136), and a rotor shaft (141) may be received through the interior of the bearing (136a). In this case, the rotor shaft (141) may pass through the can cover (136) and be connected to an impeller (240) placed inside the pumping unit (200). Through this, the other axial side of the rotor shaft (141) may be supported.

[0097] The rotor (140) is placed inside the can (130) and can be rotated by the electromagnetic force with the stator (120) when power is applied.

[0098] At this time, the rotor (140) can be rotated with the rotor shaft (141) as the axis of rotation. The rotor (140) can be fixedly coupled to the rotor shaft (141) and rotated together. For example, the rotor (140) is formed in the shape of a circular block, and the rotor shaft (141) can pass through the radial center portion of the rotor (140).

[0099] The rotor shaft (141) can be coupled with the rotor (140) to provide the rotation axis of the rotor (140). At this time, the other axial side of the rotor shaft (141) is supported by a can cover (136) and a bearing (136a), and the one axial side of the rotor shaft (141) can be supported by a shaft support (132), a bearing part (133), and a bushing (134). With this configuration, the rotor shaft (141) can be stably rotated with both axial sides supported.

[0100] The rotor shaft (141) may be formed in the shape of a column or cylinder. For example, the rotor shaft (141) may be hollow. With such a configuration, rotational performance can be maintained even if the volume of the shaft changes due to changes in ambient temperature.

[0101] Meanwhile, the rotor shaft (141) of the present invention may have a keyway (141a) formed at the end in the direction of the control unit (300) (one side in the axial direction). The keyway (141a) may be formed in correspondence with the shape of the key portion (414) of the pin (410) to be described later. For example, the keyway (141a) may be a straight groove. For another example, the keyway (141a) may be a cross-shaped groove. In this case, the length in the major axis direction of the keyway (141a) may be equal to the diameter of the rotor shaft (141), and the width in the minor axis direction of the keyway (141a) may be equal to or slightly larger than the width of the end of the key portion (414). Through this, the end of the key portion (414) can be inserted into the keyway (141a) and key-coupled, and the rotor shaft (141) can rotate together with the rotation of the pin (410).

[0102] Meanwhile, the motor unit (100) may be further equipped with a sealer (150). The sealer (150) may be placed at the top of the motor unit (100). That is, the sealer (150) may be placed between the can (130) and the pumping unit housing (210). Through this, leakage of liquid between the pumping unit housing (210) and the can (130) can be prevented.

[0103]

[0104] The pumping unit (200) is positioned on the other side of the axial direction of the motor unit (100) and can flow liquid by receiving rotational force from the motor unit (100).

[0105] The pumping unit (200) includes a pumping unit housing (210), an inlet unit (220), an outlet unit (230), and an impeller (240).

[0106] The exterior of the pumping unit housing (210) of the pumping unit (200) can be formed, and a flow path through which liquid flows can be formed inside.

[0107] Specifically, the pumping unit housing (210) may be in the shape of a cylinder with its axial end closed. For example, the axial end of the closed pumping unit housing (210) may be in the shape of a dome or a flat plate.

[0108] Meanwhile, an inlet section (220) and an outlet section (230) may be disposed on the radial outer side of the pumping section housing (210). At this time, at least a portion of the inlet section (220) may be disposed further from the motor section (100) than the outlet section (230).

[0109] A space may be formed inside the pumping unit housing (210) to rotatably accommodate the impeller (240). That is, the internal space of the pumping unit housing (210) may be formed to have a diameter larger than the diameter of the impeller (240).

[0110] The internal space of the pumping unit housing (210) may be open to one side (lower side) in the axial direction. At this time, the diameter of the open space may be larger than the diameter of the impeller (240). With this configuration, when assembling the water pump (1) of the present invention, a worker can easily insert the impeller (240) into the pumping unit housing (210).

[0111] Meanwhile, the space formed inside the pumping unit housing (210) can be in communication with the flow path formed inside the inlet section (220) and the flow path formed inside the discharge section (230). Specifically, the center of the other axial end (upper end) of the space in the pumping unit housing (210) where the impeller (240) is accommodated can be open and communicate with the inlet section (220). In addition, a radially outer part of the space in the pumping unit housing (210) where the impeller (240) is accommodated can be formed with a larger diameter and communicate with the discharge section (230).

[0112] The inlet section (220) and the discharge section (230) may be provided so that liquid can flow inside. For example, the inlet section (220) and the discharge section (230) may be in the form of pipes. The inlet section (220) may be in communication with a flow path so that liquid can flow in. Additionally, the discharge section (230) may be in communication with a flow path so that liquid can be discharged. The liquid flowing through the inlet section (220) may flow into the upper space of the other axial end (upper side) of the impeller (240) in the pumping section housing (210). Additionally, the liquid flowing radially outward due to the rotational force of the impeller (240) may flow along the flow path within the pumping section housing (210) and be discharged to the discharge section (230).

[0113] The impeller (240) can rotate in conjunction with the rotation of the rotor (140). Specifically, the impeller (240) can be coupled with the rotor shaft (141) and rotate together, and since the rotor shaft (141) is fixedly coupled to the rotor (140), when the rotor (140) rotates due to electromagnetic force, the impeller (240) can also rotate together.

[0114] The impeller (240) can flow liquid by rotation. For example, the impeller (240) is shown as having a closed shape on both axial sides, with the upper surface formed to slope upward toward the radial inner side, and having blade-shaped wings inside, but is not limited thereto and various known types of impellers may be applied.

[0115] Accordingly, the liquid introduced through the inlet (220) can be pressurized by the impeller (240) in the internal space of the pumping unit housing (210) and then discharged through the discharge unit (230).

[0116]

[0117] Meanwhile, FIG. 5 shows a perspective view for explaining a control unit housing in a water pump according to one embodiment of the present invention, and FIG. 6 shows a perspective view of FIG. 5 viewed from a different direction.

[0118] Referring to FIGS. 5 and FIGS. 6, a control unit (300) according to one embodiment of the present invention is described as follows.

[0119] The control unit (300) is coupled to one side in the axial direction of the motor unit (100) and can control the rotation of the rotor (140). Specifically, the control unit (300) includes a control unit housing (310) and a control board (320).

[0120] The control unit housing (310) can form the exterior of the control unit (300). Additionally, the control unit housing (310) can form a space for accommodating a control board (320) inside. Specifically, the control unit housing (310) includes a control unit housing body (311), a pin receiving groove (312), and a tool insertion hole (313).

[0121] At this time, the control unit housing body (311) is formed in the shape of a roughly square block, and a tool insertion hole (313) is formed on the lower side (one side in the axial direction), and a pin receiving groove (312) is formed on the upper side (the other side in the axial direction). Also, the tool insertion hole (313) and the pin receiving groove (312) can be connected to each other.

[0122] The control unit housing body (311) can be detachably coupled to one side in the axial direction of the motor housing (110). Specifically, at least one assembly hole (314) may be formed in the control unit housing body (311).

[0123] For example, the assembly hole (314) may be formed adjacent to the four corners based on the upper surface of the square block-shaped control unit housing body (311), and may be formed along the axial direction (up and down direction). In addition, an assembly guide groove (315) may be formed on the lower side of the assembly hole (314). The assembly guide groove (315) may be formed in a recessed shape along the up and down direction on the corner portion of the control unit housing body (311). Through this, the assembly hole (314) can be detachably coupled to the motor housing (110) by passing a coupling member such as a screw. Furthermore, an operator (assembler) can easily bring a tool such as a screwdriver into the assembly hole (314) along the assembly guide groove (315). Thus, assembly ease can be improved.

[0124] Meanwhile, the control unit housing body (311) includes an upper body and a lower body, and can accommodate a control board (320) and a component for operating the control board (320) in the internal space formed by combining the upper body and the lower body. At this time, the upper body and the lower body can be combined so as to be separable through a hook connection or the like.

[0125] The pin receiving groove (312) accommodates the pin (410), which will be described later, so that it can move back and forth. Specifically, the pin receiving groove (312) may be formed on the surface of the control unit housing body (311) in the direction of the motor unit (100).

[0126] At this time, the pin receiving groove (312) is formed as a circular groove in the control unit housing body (311), and the inner diameter of the pin receiving groove (312) may be larger than the diameter of the pin (410) to be described later. Accordingly, the pin (410) can be received so as to be able to reciprocate linearly along the axial direction within the pin receiving groove (312).

[0127] Meanwhile, the depth of the recess in the pin receiving groove (312) may be smaller than the axial length of the pin (410). Accordingly, when the pin (410) is received in the pin receiving groove (312), the end portion of the pin (410) may protrude outward (upward) from the upper surface of the control unit housing (310).

[0128] At least a portion of the spring (420) can be received in the pin receiving groove (312). At this time, the spring (420) can be received in the pin receiving groove (312) while in contact with at least a portion of the pin (410).

[0129] Accordingly, in the present invention, when the control unit housing (310) is separated from the motor housing (110), the pin receiving groove (312) can be exposed to the outside, and the pin (410) and spring (420) can be mounted by a simple operation in which the operator (assembler) inserts the pin (410) and spring (420) into the pin receiving groove (312).

[0130] The tool insertion hole (313) is formed from one side of the control unit housing body (311) to allow the tool to pass through and can be connected to the pin receiving groove (312).

[0131] At this time, the inner diameter of the tool insertion hole (313) may be formed to be larger than the diameter of the tool. For example, the tool may be a screwdriver. Also, the inner diameter of the tool insertion hole (313) is smaller than the inner diameter of the pin receiving groove (312).

[0132] Additionally, the tool insertion hole (313) may be connected at the radial center of the pin receiving groove (312). That is, the pin receiving groove (312), which is circular or cylindrical in shape, and the tool insertion hole (313) may be arranged coaxially.

[0133] Through this, the tool can be inserted and connected to the pin (410) while the pin (410) cannot escape through the tool insertion hole (313), and the tool can be rotated while the pin (410) is pressed to relieve the sticking of the rotor shaft (141).

[0134] Meanwhile, the control board (320) is placed within the control unit housing (310) and can control the motor unit (100). For example, the control board (320) may be a printed circuit board (PCB) of an inverter. An element capable of controlling the motor unit (100) may be mounted on the control board (320). Accordingly, the rotation of the motor unit (100) can be controlled by the operation of the control unit (300).

[0135] Meanwhile, the control unit housing (310) may be provided with a plurality of connectors (330). External power can be supplied to the control board (320) through the connectors (330), and control signals from the control board (320) can be sent to the motor unit (100). For example, at least one of the connectors (331) may be provided on the outer surface of the control unit housing (310), and at least a portion of the connector (331) may be positioned adjacent to the longitudinal end of the control board (320). Additionally, another of the connectors (332) may be provided on the upper surface of the control unit housing (310) and connected to a terminal (116) provided in the motor housing (110).

[0136]

[0137] Meanwhile, in the water pump (1), sticking due to foreign matter may occur depending on the operating environment. For example, in the case of a water pump used for hot water circulation, it is used intensively in winter when the temperature is low, and the frequency of use may be significantly lower in summer.

[0138] That is, if the liquid contains foreign substances that are prone to sticking, such as lime components, the water may evaporate and the foreign substances, such as lime, may harden in a high-temperature, dry environment or when not in use for a long period. Therefore, foreign substances may stick to the rotor shaft (141) of the water pump (1).

[0139] In this way, if foreign matter adheres between the rotor shaft (141) and the pumping unit housing (310) or between the rotor shaft (141) and the can (130), a phenomenon may occur in which the rotor shaft (141) cannot rotate even when power is applied.

[0140] To solve this, the present invention includes a deblocking part (400) to resolve the sticking of the rotor shaft (141).

[0141] In this regard, FIG. 7 shows a perspective view illustrating a pin in a water pump according to one embodiment of the present invention, FIG. 8 shows a bottom view of FIG. 7, and FIG. 9 shows a cross-sectional view illustrating the case where the pin is pressurized in a water pump according to one embodiment of the present invention.

[0142] Referring to FIGS. 7 to 9, the deblocking part (400) is described as follows. The deblocking part (400) can resolve the sticking of the rotor shaft (141).

[0143] The deblocking part (400) includes a pin (410), a spring (420), and an O-ring (430).

[0144] The pin (410) may be positioned on one side in the axial direction of the shaft support (132). Specifically, at least a portion (lower portion) of the pin (410) may be received in the pin receiving groove (312) of the control unit housing (310). And, the remaining portion (upper portion) of the pin (410) may be positioned inside the pin guide portion (115).

[0145] When an external force is applied, the pin (410) can be keyed to the rotor shaft (141) by axial movement. Specifically, when a tool is inserted through the tool insertion hole (313) and pressed upward, the pin (410) moves upward along the pin receiving groove (312), and the upper end of the pin (410) can be connected to the key groove (141a) of the rotor shaft (141).

[0146] The pin (410) includes a head portion (411), a tool coupling groove (412), a plunger portion (413), a key portion (414), and an O-ring receiving groove (415).

[0147] At this time, the head portion (411) may be positioned at the lower end of the pin receiving groove (312). The head portion (411) is formed in the shape of a disc, and the lower surface of the head portion (411) may be in contact with the pin receiving groove (312), and the upper surface of the head portion (411) may be elastically supported by contacting the spring (420). At this time, a spring coupling portion (411a) may be formed on the upper surface of the head portion (411) so that the spring (420) can be coupled thereto. For example, the spring coupling portion (411a) may be formed protruding from the head portion (411) in the shape of a disc with a reduced diameter. Accordingly, the spring coupling portion (411a) may be formed in a shape that forms a step with the head portion (411). Accordingly, when the spring (420) comes into contact with the upper surface of the head portion (411), the spring coupling portion (411a) can be fitted inside the spring (420) and come into contact with the spring (420). With this configuration, the spring (420) and the pin (410) can be stably coupled and supported.

[0148] The tool coupling groove (412) may be formed in the head portion (411). Specifically, the tool coupling groove (412) may be formed on the lower surface of the head portion (411). As an example, the tool coupling groove (412) may be a straight groove. As another example, the tool coupling groove (412) may be a cross-shaped groove.

[0149] At least a portion of the tool can be coupled to the tool coupling groove (412), and when the tool is rotated, the pin (410) can be rotated.

[0150] The plunger portion (413) may be formed to extend along the axial direction from the head portion (411). The plunger portion (413) may be formed to extend upward in the axial direction from the head portion (411). At this time, the diameter of the plunger portion (413) may be formed to be smaller than the diameter of the head portion (411).

[0151] The diameter of the plunger portion (413) may be smaller than the inner diameter of the pin guide portion (115). Accordingly, when the head portion (411) is pressed, at least a portion of the plunger portion (413) may be inserted into the pin guide portion (115).

[0152] The key portion (414) may be formed to extend from the axial upper end of the plunger portion (413). The key portion (414) may be formed to protrude in a rib shape from the axial upper end of the plunger portion (413).

[0153] The key (414) can be coupled to the rotor shaft (141). The key (414) can be coupled to a keyway (141a) formed at the bottom of the rotor shaft (141). The thickness of the key (414) can be formed to be smaller than the width of the keyway (141a). Thus, the key (414) can be inserted into the keyway (141a) to transmit the rotational force of the pin (410) to the rotor shaft (141).

[0154] The O-ring receiving groove (415) may be formed by being recessed in the plunger portion (413). The O-ring receiving groove (415) may be formed by being recessed along the circumferential direction on the outer surface of the plunger portion (413).

[0155] Accordingly, the diameter of the plunger portion (413) at the location where the O-ring receiving groove (415) is formed can be reduced. Accordingly, an O-ring (430) can be coupled to the O-ring receiving groove (415), and the O-ring (430) can be prevented from coming off even if the pin (410) moves in a straight reciprocating motion along the axial direction.

[0156] The spring (420) can apply a restoring force against the axial movement of the pin (410). For example, the spring (420) may be a coil spring.

[0157] At least a portion of the spring (420) may be placed within the pin receiving groove (312). Specifically, one axial end of the spring (420) may be in contact with the pin (410), and the other axial end of the spring (420) may be in contact with the motor housing (110). More specifically, one axial end of the spring (420) may be in contact with the upper surface of the head portion (411), and the other axial end of the spring (420) may be in contact with the lower surface of the base (113).

[0158] Meanwhile, the spring (420) can be positioned to surround the outer surface of the plunger part (413) and the pin guide part (115).

[0159] With this configuration, the spring (420) can apply a restoring force to the pin (410) when an external force is applied to the pin (410), and can guide the plunger part (413) to be inserted into the pin guide part (115).

[0160] The O-ring (430) can seal the space between the outer surface of the plunger portion (413) and the pin guide portion (115). For example, the O-ring (430) can be formed in a ring shape and coupled to an O-ring receiving groove (415) formed in the plunger portion (413).

[0161] At this time, the O-ring (430) can prevent liquid present in the motor part (100) and / or pumping part (200) from leaking between the rotor shaft (141) and the can body (131) and flowing into the control part (300).

[0162] Furthermore, in this embodiment, since an O-ring (430) is provided along with a bushing (134) on the outer side of the rotor shaft (141), it is possible to block liquid from flowing into the control unit (300) where a number of electronic components exist.

[0163]

[0164] As described above, the process of assembling the pin (410) in the water pump (1) according to one embodiment of the present invention and the process of relieving sticking are explained as follows.

[0165] A worker (assembler) assembling a water pump (1) according to one embodiment of the present invention inserts a pin (410) into a pin receiving groove (312) formed in a control unit housing (310). At this time, the head portion (411) of the pin may be positioned so as to touch the bottom of the pin receiving groove (312).

[0166] After that, a spring (420) is inserted into the upper side of the head portion (411). At this time, it is preferable to assemble it so that the spring (420) is fitted into the spring coupling portion (411a).

[0167] After that, the operator positions the upper surface of the control unit housing (310) and the lower surface of the motor housing (110) so that they come into contact with each other. At this time, the hole formed in the motor housing (110) and the assembly hole (314) of the control unit housing (310) are aligned. In addition, the lower end of the pin guide part (115) is aligned so that it is placed inside the pin receiving groove (312).

[0168] In this state, the worker can insert a connecting member, such as a screw, into the assembly hole (314) and complete the connection by rotating the connecting member with a tool such as a screwdriver.

[0169] Accordingly, in the present invention, the pin receiving groove (312) is formed in the control unit housing (310) rather than the motor housing (110), so that the pin (410) can be assembled through a simple process of inserting the pin (410) into the control unit housing (310) and then joining the control unit housing (310) and the motor housing (110).

[0170] Meanwhile, as illustrated in FIG. 9, in order to resolve the sticking of the rotor shaft (141), the operator can first insert a tool into the tool insertion hole (313). When the tool passes through the tool insertion hole (313), it can come into contact with the head portion (411) of the pin (410). At this time, when the operator presses the tool further to apply pressure to the head portion (411) and rotates the tool, the blade of the tool presses the head portion (411) toward the motor housing (110), and at the same time, the blade portion of the tool rotates and is fitted into the tool coupling groove (412). Accordingly, the tool and the pin (410) begin to rotate in conjunction. Then, when the operator presses the tool further and rotates it, the key portion (414) of the pin (410) rotates and engages with the key groove (141a) of the rotor shaft (141).

[0171] At this time, if the operator rotates the tool further, the tool, pin (410), and rotor shaft (141) rotate together, and the hardened foreign matter can be removed and the sticking of the rotor shaft (141) can be resolved.

[0172] That is, according to the present invention, when an external force is applied to the pin (410) through a tool, the pin (410) is coupled with the rotor shaft (141) and rotates together, thereby relieving the sticking.

[0173]

[0174] Meanwhile, FIG. 10 shows a cross-sectional view for explaining a water pump according to another embodiment of the present invention.

[0175] Referring to FIG. 10, a water pump according to another embodiment of the present invention is described as follows.

[0176] Meanwhile, to avoid repetitive explanations, parts not specifically described in this embodiment may be referenced as they have the same structure and effect as the water pump according to one embodiment of the present invention.

[0177] In this embodiment, compared to the pin guide portion (115) formed in the motor housing in one embodiment of the present invention, the pin guide portion (1135) is formed in the can. That is, a shaft support portion (1132) is formed at one axial end (lower end) of the can body, and a pin guide portion (1135) can be extended from the radially inner end of the shaft support portion (1132). For example, the shaft support portion (1132) can be formed in the shape of a hollow disc.

[0178] The pin guide portion (1135) may be formed by bending and extending downward from the radially inner end of the shaft support portion (1132). The pin guide portion (1135) may be formed by extending from the center of the shaft support portion (1132) toward the control portion (300), and may be formed in a cylindrical shape.

[0179] Meanwhile, in this embodiment, the pin guide portion (1135) may accommodate at least a portion of the bearing portion (1133) and at least a portion of the rotor shaft (1141) inside. To this end, the inner surface of the pin guide portion (1135) may be formed in a stepped manner. That is, the pin guide portion (1135) may be composed of a first portion (1135a) having an inner diameter equal to the inner diameter of the shaft support portion (1132) so that the bearing portion (1133) and the rotor shaft (1141) are coupled, a second portion (1135b) in which the inner diameter is reduced from the first portion (1135a) so that an axial end of the rotor shaft (1141) is positioned, and a third portion (1135c) in which the inner diameter is reduced from the second portion (1135b) so that the plunger portion (1413) of the pin passes through. Accordingly, the inner diameter of the first part (1135a) can be formed to be larger than the inner diameter of the second part (1135b), and the inner diameter of the second part (1135b) can be formed to be larger than the inner diameter of the third part (1135c).

[0180] With such a configuration, there is an advantage in that a sealing effect can be provided through a multi-stage structure even without a bushing (134) in one embodiment of the present invention.

[0181] Meanwhile, the outer diameter of the pin guide portion (1135) may be smaller than the inner diameter of the pin receiving groove (1312) to be described later. Accordingly, at least a portion of the pin guide portion (1135) may be placed inside the pin receiving groove (1312), and at least a portion of the plunger portion (1413) may be inserted inside the pin guide portion (1135).

[0182] Accordingly, the head portion (1411) and the plunger portion (1413) can reciprocate axially along the pin guide portion (1135).

[0183]

[0184] Although the present invention has been described in detail through specific embodiments, this is for the purpose of specifically explaining the invention and is not limited thereto. It is evident that modifications or improvements to the present invention are possible by those skilled in the art within the technical scope of the invention.

[0185] All simple variations or modifications of the present invention fall within the scope of the present invention, and the specific scope of protection of the present invention will be clarified by the appended claims.

Claims

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.

21. In Paragraph 17, 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 22. 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; and 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.

23. In Paragraph 17, The above control unit housing is, Control unit housing body; A pin receiving groove formed on the motor housing direction surface of the control unit housing body and receiving the pin; and 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.

24. 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 is separated from the motor housing, the pin receiving groove is exposed to the outside.

25. In Paragraph 22, 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.

26. In Paragraph 21, An O-ring that seals the outer surface of the plunger portion and the pin guide portion; A water pump that further includes.

27. In Paragraph 17, A bearing portion disposed between the shaft support portion and the rotor shaft; A water pump that further includes.

28. In Paragraph 27, A bushing supporting the space between the shaft support and the bearing; A water pump that further includes.

29. In Paragraph 17, 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.

30. In Paragraph 17, The above pin guide part is, A water pump characterized by being formed by extending from the shaft support portion.

31. In Paragraph 30, The above pin guide part is, A water pump characterized by having an inner surface formed in stages.

32. In Paragraph 30, 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 33. 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 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, the pin guide portion is disposed on the radial outer side of at least a portion of the pin, and at least a portion of the pin receiving groove is disposed on the radial outer side of at least a portion of the pin guide portion.

34. In Paragraph 33, The above control unit housing is, A spring that applies a restoring force against the axial movement of the above pin; Includes more, The above spring is, A water pump characterized by being a coil spring, wherein at least a portion of the pin guide portion is disposed inside and at least a portion of the pin receiving groove is disposed outside.

35. In Paragraph 33, 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.

36. In Paragraph 33, A water pump characterized in that the inner diameter of the pin guide portion is smaller than the outer diameter of the rotor shaft.

37. In Paragraph 33, The above pin guide part is, A water pump characterized by being formed by extending from the shaft support portion.

38. In Paragraph 37, The above pin guide part is, A water pump characterized by having an inner surface formed in stages.

39. In Paragraph 37, 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 40. In Paragraph 33, 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.

41. In Paragraph 33, 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.

42. In Paragraph 33, 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.

43. In Paragraph 33, 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.

44. In Paragraph 33, 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 45. In Paragraph 44, An O-ring that seals the outer surface of the plunger portion and the pin guide portion; A water pump that further includes.

46. ​​In Paragraph 33, A bearing portion disposed between the shaft support portion and the rotor shaft; A water pump that further includes.

47. In Paragraph 46, A bushing supporting the space between the shaft support and the bearing; A water pump that further includes.

48. In Paragraph 33, 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.

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