WO2021086135A1

WO2021086135A1 - Water pump

Info

Publication number: WO2021086135A1
Application number: PCT/KR2020/015082
Authority: WO
Inventors: 엄경호; 김희준
Original assignee: 명화공업주식회사; 승일테크 유한책임회사
Priority date: 2019-10-31
Filing date: 2020-10-30
Publication date: 2021-05-06
Also published as: KR20210051953A; KR102263632B1

Abstract

The present invention provides a water pump comprising: a housing having an inlet and an outlet through which cooling water flows in and is discharged; a rotary shaft provided inside the housing; a rotor coupled to the outer circumferential surface of the rotary shaft; a stator including a bobbin disposed at the radial outer side of the rotor, and a coil wrapped around the bobbin; an impeller which is disposed at one side of the stator and to which the rotary shaft is coupled; a controller which is coupled to the housing at the other side of the stator, and which has an insertion hole into which the end portion of the coil, that remains after wrapping around the bobbin, is inserted; and a sealing structure which is inserted into the insertion hole and which fixes the end portion of the coil to the controller. The water pump according to the present invention is designed to have a structure in which the sealing structure is inserted into the insertion hole formed at the controller, and the coil wound around the bobbin passes through the sealing structure so as to be connected to the controller, and thus the present invention can more simply and more firmly fix the coil to the controller and can improve the airtightness of the insertion hole by means of the sealing structure. Therefore, the water pump according to the present invention improves an airtight structure so as to enable production efficiency to increase and manufacturing costs to be reduced, and thus can be assembled and disassembled so that unnecessary waste for repair and inspection can be reduced.

Description

Water pump

The present invention relates to a water pump, and more particularly, to a water pump that sucks coolant and circulates it to an engine.

In general, a water pump means a pump that forcibly circulates coolant into the engine. Engines that obtain power using the explosive power of fuel, such as engines of automobiles, generate high-temperature heat during operation. If this is not properly controlled, it will adversely affect the engine itself as well as other adjacent engines. Therefore, cooling water is essentially used as a means to cool off the above heat.

As related to the water pump, Korean Patent Laid-Open No. 10-2019-0065686 discloses a water pump that improves the cooling effect of the stator and thereby reduces the manufacturing cost of the product.

In the conventional water pump, a can is not separately provided between the rotor and the stator. The coolant introduced into the housing of the water pump through the impeller is supplied to the controller side through the air cap between the rotor and the stator, and then comes into contact with the surface opposite the stator side of the controller. In this case, since the cooling area of the controller increases, the size of the controller can be reduced, thereby reducing the manufacturing cost of the product.

Meanwhile, according to the conventional water pump, the stator includes a bobbin disposed outside the rotor in a radial direction, and a coil surrounding the bobbin. The coil is inserted into an insertion hole formed in the controller after wrapping the bobbin to be electrically connected to the controller. At this time, according to the conventional water pump, in order to prevent the cooling water supplied into the housing from flowing into the controller through the insertion hole, the coil is inserted into the insertion hole and then inserted using an epoxy or UV molding method. It is designed in a way that fills the hole.

In the case of molding the insertion hole with epoxy or UV as described above, a high temperature, ultraviolet ray, and curing time are required as conditions for curing the molding agent, and a separate dedicated facility is required for this because the coil must be fixed so that it does not move. . In addition, according to such a conventional water pump, since stagnation occurs in the production process during the curing time, it causes an increase in manufacturing cost and a decrease in production efficiency. And, according to the conventional water pump, there is a problem that unnecessary waste is generated because decomposition analysis is impossible when repairing a failure due to epoxy or UV molding.

The present invention has been created in order to achieve the above object, and an object of the present invention is to provide a water pump that more easily fixes the coil to the controller and improves the airtightness of the insertion hole of the controller into which the coil is inserted.

The present invention provides a housing having an inlet and an outlet through which cooling water is introduced and discharged; a rotating shaft installed inside the housing; A rotor coupled to an outer circumferential surface of the rotating shaft; a stator including a bobbin disposed radially outside the rotor and a coil surrounding the bobbin; An impeller disposed on one side of the stator and to which the rotation shaft is coupled; A controller coupled to the housing at the other side of the stator and having an insertion hole enclosing the bobbin and inserting the remaining end of the coil; And a sealing structure inserted into the insertion hole and fixing an end of the coil to the controller.

The sealing structure may include an insertion portion inserted into the insertion hole, a seating portion coupled to the insertion portion and seated on the bobbin, and a coupling portion installed on the seating portion and coupled to the bobbin.

The insertion unit may include an insertion body, and a pair of protrusion members protruding from the insertion body to the other side and disposed to be spaced apart from each other, and each of which ends of the coil penetrate into the inside.

It may further include an auxiliary fixing member protruding from the other side of the inner wall of the insertion hole to one side and inserted between the pair of protruding members.

The protruding member may include a first protruding member and a second protruding member protruding from the first protruding member to the other side and having a thickness smaller than that of the first protruding member.

The insertion portion may protrude from an outer circumferential surface to contact an inner wall of the insertion hole, and a plurality of elastic protrusions disposed to be spaced apart from each other from one side to the other side may protrude.

The coupling portion is inserted into the insertion portion, the first coupling member through which each end of the coil penetrates therein, and a second coupling formed protruding from the outer circumferential surface of the first coupling member and seated on the inner wall of the seating portion A member and a fixing protrusion formed protruding toward one side of the second coupling member and inserted into and fixed to the bobbin may be included.

The insertion part and the seating part may be formed of a rubber material, and the coupling part may be formed of a plastic material.

According to the water pump according to the present invention, the sealing structure is inserted into the insertion hole formed in the controller, and the coil wound around the bobbin is designed to be connected to the controller through the sealing structure, thereby making the coil more convenient and more robust. It can be fixed to the controller, and the airtightness of the insertion hole by the sealing structure can be improved.

Therefore, according to the water pump according to the present invention, the airtight structure can be improved to increase production efficiency and reduce manufacturing cost, and accordingly, disassembly and assembly is possible, thereby reducing unnecessary waste for repair and inspection.

1 is a cross-sectional view of a water pump according to the present invention.

2 is a cross-sectional view showing a state in which the controller is separated from the housing in FIG. 1.

3 is a perspective view of the sealing structure shown in FIG. 2.

Figure 4 is a perspective view of the stator and sealing structure shown in Figure 1;

5 is a cross-sectional view showing a state in which the sealing structure shown in FIG. 3 is inserted into the controller.

The present invention has been described with reference to the embodiments shown in the drawings, but these are merely exemplary, and those of ordinary skill in the art will appreciate that various modifications and equivalent other embodiments are possible therefrom. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

1 to 5, a water pump 100 according to an embodiment of the present invention includes a housing 122, an impeller 110, a rotating shaft 120, a rotor 121, a stator 123, It includes a controller 150 and a sealing structure 130.

The housing 122 includes the impeller 110, the rotation shaft 120, the rotor 121, and the stator 123 are accommodated therein, and an inlet 101 through which cooling water (not shown) flows in, and a cooling water ( (Not shown) is formed with a discharge port 102 to be discharged to the outside. In addition, some of the coolant (not shown) introduced into the impeller 110 through the inlet 101 is introduced into the space where the rotor 121 and the stator 123 are disposed, and the inside of the housing 122 Cycle.

The impeller 110 is disposed on one side of the stator 123 and sucks coolant (not shown) by rotation. In addition, the impeller 110 applies pressure to the sucked coolant (not shown) to supply coolant (not shown) to the engine inside the vehicle. Accordingly, the impeller 110 cools the engine to prevent overheating, and allows the engine to maintain an appropriate temperature.

The rotation shaft 120 is formed to pass through the central portion of the housing 122, and one end is coupled to the impeller 110. In addition, the rotation shaft 120 is rotated by the rotor 121 to rotate the impeller 110.

Here, the rotor 121 is coupled to the outer circumferential surface of the rotation shaft 120. In addition, the rotor 121 rotates by a magnetic field formed by the stator 123 to rotate the rotation shaft 120 and the impeller 110. The stator 123 is fixed to the inner circumferential surface of the housing 122 so as to surround the outer side in the radial direction of the rotor 121. In addition, the stator 123 generates a magnetic field through power supplied from the outside, thereby rotating the rotor 121.

The stator 123 includes a bobbin 127 and a coil 125. The bobbin 127 is disposed outside the stator 123. The coil 125 is disposed to surround the bobbin 127. The controller 150 is disposed on the other side of the stator 123 and is coupled to the housing 122. The controller 150 controls the current supplied to the stator 123 or controls angular displacement and rotation angle of the rotor. In addition, the controller has an insertion hole 132 that surrounds the bobbin 127 and inserts the end 124 of the coil remaining therein.

3 to 5, the sealing structure 130 is inserted into the insertion hole 132, and an end portion 124 of the remaining coil surrounding the bobbin 127 is inserted therein. Accordingly, the sealing structure 130 securely fixes the coil 125 to the controller 150. Meanwhile, the coil 125 inserted into the controller 150 is coupled to a circuit board (not shown) disposed inside the controller 150 by soldering or fusing.

Coolant (not shown) flowing into the housing 122 through the inlet 101 flows into a space in which the rotor 121 and the stator 123 are accommodated. In addition, the coolant (not shown) introduced in this way is brought into contact with a surface of the controller 150 facing the stator 123 side to cool the controller 150. The sealing structure 130 not only fixes the coil 125 to the controller 150, but also allows cooling water (not shown) introduced into the space in which the stator 123 is accommodated to the inside of the controller 150. It serves to hermetically seal the insertion hole 132 so that it cannot be introduced.

The sealing structure 130 includes an insertion part 133, a seating part 134, and a coupling part 135.

The insertion part 133 is inserted into the insertion hole 132. The seating portion 134 is coupled to the insertion portion 133 and seated on the bobbin 127. The coupling part 135 is installed on the seating part 134 and is coupled to the bobbin 127.

The insertion part 133 is an insertion body 136 and a pair of protrusion members 139 protruding from the insertion body 136 to the other side and arranged to be spaced apart from each other so that the end 124 of the coil penetrates into the inside. Includes.

And between the pair of protruding members 139, the auxiliary fixing member 140 protruding from the other side of the inner wall of the insertion hole 132 to one side and inserted between the pair of protruding members 139. ) Is formed.

Here, the protruding member 139 includes a first protruding member 137 and a second protruding member protruding from the first protruding member 137 to the other side and having a thickness smaller than that of the first protruding member 137 ( 138). In addition, the auxiliary fixing member 140 is formed between the pair of second protruding members 138 and an adhesion force applied to the pair of first protruding members 137 presses the coil 125 to seal Inflow of cooling water that may occur between the outer circumferential surfaces of the coil 125 penetrating the structure 130 is blocked.

The insertion part 133 protrudes from an outer circumferential surface to contact an inner wall of the insertion hole 132, and a plurality of elastic protrusions 143 are formed to protrude from one side to the other side so as to be spaced apart from each other.

On the other hand, the plurality of elastic protrusions 143 are fixedly disposed in the insertion hole 132 by providing a close contact force, so that cooling water (not shown) can be prevented from flowing into the insertion hole 132. In addition, the plurality of elastic protrusions 143 are effective in preventing leakage of cooling water (not shown) by providing a sealing function.

In addition, the plurality of elastic protrusions 143 can maintain airtightness against high-speed rotational vibrations and impacts without deviating from the fixed position, as well as elastically support the ends 124 of the coils. By preventing separation or separation, the end 124 of the coil can be more firmly fixed to the controller 150.

The coupling part 135 is inserted into the insertion part 133, the first coupling member 144 through which each end 124 of the coil penetrates, and an inner wall of the seating part 134 It includes a second coupling member 145 seated on. In addition, the coupling part 135 protrudes to one side of the second coupling member 145 and includes a fixing protrusion 146 that can be inserted into the bobbin 127. Accordingly, the coupling part 135 may be such that the insertion part 133 and the seating part 134 are firmly fixed to the bobbin 127.

Meanwhile, the insertion part 133 and the seating part 134 may be formed of a rubber material having elasticity. Therefore, the insertion part 133 and the seating part 134 may be elastically fixed to the inner wall of the insertion hole 132 more firmly, and the interior of the insertion hole 132 may be more tightly sealed. I can.

Here, the rubber material may be any one or a combination of two or more of natural rubber, elastomer, and silicone rubber, but is not limited thereto.

Meanwhile, the coupling part 135 may be formed of a plastic material. In this case, structural stability and overall rigidity of the sealing structure 130 may be improved.

Here, the plastic material may be any one or more of polyethylene, polyvinyl chloride, and polyvinyl alcohol, which is light and has good productivity, but is not limited thereto.

Conventionally, in order to prevent the cooling water (not shown) supplied into the housing 122 from flowing into the controller 150 by the passage of the coil passing through the housing 122, the passage of the coil is made of epoxy or UV light. A method of sealing using a molding method was used.

However, in the case of molding with epoxy or UV, a high temperature or UV curing time is required, and since the coil 125 must be fixed so as not to move, a separate dedicated facility is required for this. Accordingly, there was a problem of increasing the manufacturing cost and reducing the production efficiency because the production process was stagnant during the curing time.

However, like the water pump 100 according to an embodiment of the present invention, the cooling water (not shown) supplied into the housing 122 surrounds the end 124 of the coil passing through the housing 122. By including the sealing structure 130, the end 124 of the coil can be closely contacted with the insertion hole 132, and the cooling water flowing into the controller 150 from the inside of the housing 122 (not shown) I can fundamentally block the penetration of moisture.

Accordingly, according to the water pump 100 according to the present invention, the production efficiency of the coil 125 can be increased without a separate dedicated facility, manufacturing cost can be reduced, and disassembly and assembly can be easily repaired. And it is possible to reduce unnecessary waste for inspection.

Claims

A housing having an inlet port and an outlet port through which cooling water is introduced and discharged;

A rotation shaft installed inside the housing;

A rotor coupled to the outer circumferential surface of the rotation shaft;

A stator including a bobbin disposed outside the rotor in a radial direction and a coil surrounding the bobbin;

An impeller disposed on one side of the stator and to which the rotation shaft is coupled;

A controller coupled to the housing at the other side of the stator and having an insertion hole enclosing the bobbin and inserting the remaining end of the coil; And

A water pump inserted into the insertion hole and including a sealing structure fixing an end of the coil to the controller.
The method according to claim 1,

The sealing structure,

An insertion part inserted into the insertion hole,

A seating portion coupled to the insertion portion and seated on the bobbin,

A water pump installed on the seating portion and including a coupling portion coupled to the bobbin.
The method according to claim 2,

The insertion part,

With the insert body,

A water pump including a pair of protruding members protruding from the insertion body to the other side, disposed to be spaced apart from each other, and passing end portions of the coils therein.
The method of claim 3,

The water pump further comprises an auxiliary fixing member protruding from the other side of the inner wall of the insertion hole to one side and inserted between the pair of protruding members.
The method of claim 4,

The protruding member,

A first protruding member,

A water pump including a second protruding member protruding from the first protruding member to the other side and having a thickness smaller than that of the first protruding member.
The method according to claim 2,

The insertion portion is a water pump protruding from an outer circumferential surface, contacting an inner wall of the insertion hole, and having a plurality of elastic protrusions disposed to be spaced apart from each other from one side to the other side.
The method according to claim 2,

The coupling part,

A first coupling member that is inserted into the insertion portion and has an end of the coil penetrating into the interior,

A second coupling member protruding from an outer circumferential surface of the first coupling member and seated on an inner wall of the seating portion;

A water pump protruding toward one side of the second coupling member and including a fixing protrusion inserted into and fixed to the bobbin.
The method according to claim 2,

The insertion part and the seating part are formed of a rubber material,

The coupling part is a water pump formed of a plastic material.