KR101807204B1 - Washer pump for vehicle - Google Patents

Abstract

A washer pump device for a vehicle according to the present invention comprises: an impeller chamber which is provided with a washer solution inlet and a washer solution outlet, accommodates an impeller, and pumps a wash solution; and a motor chamber which is disposed on the impeller chamber, and is provided with a motor rotating the impeller therein. The impeller chamber and the motor chamber are formed in one housing. The boundary of the motor chamber and the impeller chamber is provided with a stepwise shoulder portion. The washer pump device for a vehicle comprises: a water seal which is disposed between the motor chamber and the impeller chamber, seals a rotary shaft of the motor to rotate, and is made of an elastic material; and a synthetic resin injection cover which is accommodated under the water seal, is provided with an avoidance hole penetrated by the rotary shaft of the motor without contact, and is installed to support the edge of the shoulder portion.

Description

[0001] Washer pump for vehicle [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle washer pump apparatus for spraying a washing liquid for washing a windshield glass or a rear glass of a vehicle.

Generally, a vehicle is equipped with a wiper rotating on a windshield glass in order to secure a forward visibility. In order to smooth the movement of the wiper blade and to effectively clean the engine room hood, a washer nozzle is mounted on the cowl side to spray the washer liquid onto the windshield glass. Meanwhile, a hatchback style vehicle is equipped with a washer nozzle at the tail gate. The structure of the washer liquid spraying apparatus includes a washer liquid tank storing a washer liquid, a washer pump apparatus for pushing and pushing the washer liquid in the washer liquid tank, and a washer nozzle for spraying the washer liquid supplied from the washer liquid pump into a windshield glass or rear glass Lt; / RTI >

On the other hand, the washer pump device has a structure in which an upper motor and a lower pump are connected by a rotary shaft. An impeller connected to the motor shaft is built in the pump housing. The impeller is rotated by the motor driving force, And the washer fluid is pushed to the washer nozzle through the discharge port of the pump housing.

An example of such a washer pump device is disclosed in Korean Patent No. 1267494.

The conventional washer pump apparatus has a structure in which the impeller housing and the motor housing are separately manufactured and then bonded to each other by heat fusion or the like. However, such a structure often causes a problem that the washer fluid flowing into the impeller housing through which the washer liquid flows enters the motor housing. On the other hand, there is a problem that leakage may occur at a portion connecting the impeller housing and the motor housing.

In order to solve such a problem, a washer pump apparatus having an impeller chamber and a motor chamber formed as an integral housing has been developed. An example of the washer pump apparatus composed of the integral housing as described above is disclosed in Korean Patent Registration No. 1267494.

The structure disclosed in the aforementioned Japanese Patent No. 1267494 includes a synthetic resin seal base separating the impeller chamber and the motor chamber and isolating the washer fluid of the impeller chamber from the motor chamber and a rubber shaft shaft. However, since the O-ring must be installed on the outer periphery of the seal base, the O-ring is not coupled to the correct position during the assembling process, so that the washer fluid may flow into the motor chamber. In addition, since a relatively small O-ring needs to be assembled separately, productivity is low.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to improve the structure of a washer pump apparatus having a single impeller housing and a motor housing, thereby improving the sealing function between the impeller housing and the motor housing, To provide a washer pump device.

According to an aspect of the present invention, there is provided a washer-pump apparatus for a vehicle, comprising: an impeller chamber having a washer fluid inlet and a washer fluid outlet, the impeller being accommodated and pressure- And

And a motor chamber disposed in the upper portion of the impeller chamber and provided with a motor for rotating the impeller,

Wherein the impeller chamber and the motor chamber are formed into a single housing,

Wherein a boundary between the motor chamber and the impeller chamber is provided with a stepped shoulder portion,

A water seal disposed between the motor chamber and the impeller chamber and made of a stretchable material that rotatably seals the rotation shaft of the motor; And

And an injection cover made of a synthetic resin, which is accommodated in a lower portion of the water seal and has a circumferential hole penetrating through the rotation shaft of the motor without contact therewith, and which supports the edge of the shoulder portion.

And a seal ring protruding from the outer circumferential surface of the water seal and extending in the circumferential direction of the water seal and formed integrally with the water seal.

The plurality of seal rings are preferably spaced along the longitudinal direction of the housing.

Wherein the injection cover has a plurality of coupling projections projected upward,

Preferably, the water seal includes a plurality of engaging recesses to be engaged with the engaging protrusions.

And a plurality of reinforcing ribs spaced apart from each other around the sealing hole through which the rotary shaft of the motor passes may be provided on the upper surface of the water seal.

Since the impeller chamber and the motor chamber are constituted by a single housing, the moisture resistance of the washer is improved as compared with the conventional combined housing by the heat fusion, and the sealing member between the impeller chamber and the motor chamber is formed by the water seal There is no need for a separate O-ring, so that it is possible to solve the problem that the O-ring is assembled and assembled at an abnormal position. Further, since the seal ring integrally formed on the outer circumferential surface of the water seal does not require a separate O-ring assembly process in the water seal assembly process, productivity is improved. Further, as in the preferred embodiment of the present invention, since the coupling protrusion provided on the injection cover and the coupling groove provided on the water seal are combined, the water seal and the injection cover can be assembled into the housing in a preassembled state, . In addition, the reinforcing rib provided on the upper surface of the water seal prevents the water seal made of a stretchable material from being easily deformed, thereby improving water tightness.

1 is a perspective view showing an outer main configuration of a washer pump apparatus for a vehicle according to the present invention.
Fig. 2 is an exploded perspective view of the washer pump apparatus for a vehicle shown in Fig. 1. Fig.
3 is a sectional view taken along the line III-III shown in Fig.
FIG. 4 is a view showing the structure of the water seal shown in FIG. 2. FIG.
Fig. 5 is a view of the water seal shown in Fig. 4 viewed from another direction. Fig.
FIG. 6 is a view showing the structure of the injection cover shown in FIG. 2. FIG.
Fig. 7 is a view of the injection cover shown in Fig. 6 viewed from the other direction. Fig.

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

1 is a perspective view showing an outer main configuration of a washer pump apparatus for a vehicle according to the present invention. Fig. 2 is an exploded perspective view of the washer pump apparatus for a vehicle shown in Fig. 1. Fig. 3 is a sectional view taken along the line III-III shown in Fig. FIG. 4 is a view showing the structure of the water seal shown in FIG. 2. FIG. Fig. 5 is a view of the water seal shown in Fig. 4 viewed from another direction. Fig. FIG. 6 is a view showing the structure of the injection cover shown in FIG. 2. FIG. Fig. 7 is a view of the injection cover shown in Fig. 6 viewed from another direction. Fig.

1 to 7, a washer pump apparatus 10 for a vehicle according to a preferred embodiment of the present invention includes a housing 20, an impeller 30, a motor 40, a water seal 50, And a cover (60).

The housing 20 is a member having a hollow space formed therein. The housing (20) includes an impeller chamber (22) and a motor chamber (25).

The impeller chamber 22 is formed at a lower portion of the housing 20. The impeller 30 is rotatably installed in the housing 20 in the impeller chamber 22. A washer fluid inlet 23 and a washer fluid outlet 24 are provided on the side of the impeller chamber 22, respectively. The washer fluid inlet 23 and the washer fluid outlet 24 communicate with the impeller chamber 22. The impeller 30 sucks the washer liquid through the washer fluid inlet port 23 and presses the washer fluid toward the washer fluid outlet 24. The impeller 30 is rotated by a motor 40 described later.

The motor chamber (25) is disposed above the impeller chamber (22). The motor chamber (25) and the impeller chamber (22) are formed as one housing (20). A motor (40) for rotating the impeller (30) is installed in the motor chamber (25). The rotating shaft 42 of the motor 40 is coupled to the impeller 30.

The boundary between the motor chamber (25) and the impeller chamber (22) has a stepped shoulder (27). The shoulder portion (27) constitutes a bottom edge of the motor chamber (25). The shoulder portion 27 is formed by a difference in inner diameter between the motor chamber 25 and the impeller chamber 22.

A terminal cap (70) is coupled to the upper portion of the motor chamber (25). The terminal cap 70 is configured to cover the upper surface of the housing 20. A waterproof connector connection part (72) electrically connected to the motor (40) is provided at an upper part of the terminal cap (70). The waterproof connector connection portion 72 is closed in an open space or physically by connecting a waterproof connector (not shown). The waterproof connector connecting portion 72 is provided with a terminal terminal 76. Therefore, the inflow of air or the inflow of water through the waterproof connector connecting portion 72 is impossible. The waterproof connector connected to the waterproof connector connection part 72 can adopt a conventional structure, and thus a detailed description thereof will be omitted.

An O-ring 71 is provided between the housing 20 and the terminal cap 70. The O-ring 71 seals a gap formed between the housing 20 and the terminal cap 70. The O-ring 71 serves to prevent moisture or air from flowing into the terminal cap 70 through a portion where the terminal cap 70 and the housing 20 are coupled.

The terminal cap (70) has a vent hole (74). The vent hole (74) is formed to communicate with an outer space of the terminal cap (70) and an inner space. For example, the vent 74 may be formed on the top surface of the terminal cap 70. A membrane member (75) is provided in the vent hole (74). The membrane member 75 may comprise a fluororesin membrane structure having a plurality of very small and dense pores, for example, called Gore-Tex. Therefore, the membrane member 75 does not pass through the molecules.

The water seal (50) is disposed between the motor chamber (25) and the impeller chamber (22). The water seal (50) rotatably seals the rotating shaft (42) of the motor (40). The water seal 50 is made of a stretchable material such as rubber. The water seal (50) is provided at the center thereof with a sealing hole (52) penetrating the upper surface and the lower surface. The sealing hole (52) rotatably accommodates the rotary shaft (42) of the motor in a pressing state. A lubricating grease may be applied to the rotating shaft 42 of the motor. The lower surface of the water seal (50) is supported by the shoulder portion (27). A plurality of reinforcing ribs 54 are provided on the upper surface of the water seal 50. The reinforcing ribs 54 are provided so as to be spaced along the sealing holes 52 through which the rotary shaft 42 of the motor passes. For example, four reinforcing ribs 54 may be provided at intervals of 90 degrees. The reinforcing ribs 54 serve to prevent the water seal 50 made of a stretchable material from being easily deformed by an external force, thereby improving durability.

The water seal 50 has an injection cover receiving portion 55, which will be described later. The injection cover receiving portion 55 is recessed upward from the lower surface of the water seal 50. The injection cover receiving portion 55 is provided with a plurality of engaging groove portions 58. The engaging groove portion 58 is a portion where the engaging projection 62 provided in the ejection cover 60 described later is received and engaged. The coupling groove 58 allows the injection cover 60 and the water seal 50 to be assembled to the housing 20 in a pre-assembly state to improve assemblability, Thereby preventing the injection cover 60 from being lost.

A seal ring (56) is provided on the outer circumferential surface of the water seal (50). The seal ring (56) protrudes from the outer circumferential surface of the water seal (50). The seal ring (56) extends in the circumferential direction of the water seal (50). The seal ring (56) is formed integrally with the water seal (50). The seal ring 56 replaces the role of a conventional O-ring. Since the seal ring 56 is integrally formed with the water seal 50, it does not need to be assembled separately, which contributes to improvement in assemblability. Since the seal ring 56 is integrally formed with the water seal 50, misalignment is prevented, and the seal ring 56 is always positioned at a constant position, thereby improving the assemblability of the water seal 50.

A plurality of the seal rings 56 may be provided so as to be spaced along the longitudinal direction of the housing 20. When a plurality of the seal rings 56 are provided, water tightness between the motor chamber 25 and the impeller chamber 22 is improved.

The injection cover (60) is accommodated in the lower part of the water seal (50). More specifically, the injection cover (60) is engaged with the injection cover receiving portion (55). The injection cover (60) has an escape hole (64) through which the rotation axis (42) of the motor passes without being contacted. The injection cover (60) is installed to support the shoulder (27). The injection cover 60 is formed of a synthetic resin. For example, the injection cover 60 may be made of acrylo butadiene styrene resin (ABS resin), polycarbonate resin (PC resin), or polypropylene resin (PP resin). A coupling protrusion 62 is provided on the upper surface of the injection cover 60. The ejection cover (60) protrudes upward from the upper surface of the engaging projection (62). A plurality of the engagement protrusions 62 are provided. The engaging projection 62 is received in the engaging groove 58 of the water seal 50.

Hereinafter, the operation and effect of the washer pump 10 for a vehicle including the above-described components will be described in detail by taking as an example the process of assembling the impeller 30 and the motor 40 in the housing 20 .

Referring to FIG. 2, the impeller 30 is coupled to the housing 20 first. The impeller (30) is loaded downward from above the housing (20). The impeller 30 passes through the motor chamber 25 and is received in the impeller chamber 22. The water seal (50) and the injection cover (60) are now engaged. A pressure is applied to the injection cover 60 so that the coupling protrusion 62 provided in the injection cover 60 is received in the coupling groove 58 provided in the water seal 50, . The water seal 50 and the injection cover 60 are loaded downward from above the housing 20 in a state where they are assembled together. The water seal 50 and the injection cover 60 move downward until the lower surface of the injection cover 60 is supported by the shoulder portion 27 through the motor chamber 25. The motor (40) is loaded downward from above the housing (20). The motor 40 is received in the motor room 25 through the upper entrance of the housing 20. The rotation shaft 42 of the motor 40 passes through the sealing hole 52 of the water seal 50 and then passes through the escape hole 64 of the injection cover 60 to penetrate the impeller 30, Lt; / RTI > The lower surface of the motor (40) is supported on the upper surface of the water seal (50). A reinforcing rib 54 is provided on the upper surface of the water seal 50 on which the lower surface of the motor 40 is supported to prevent the shape of the water seal 50 from being deformed. The seal ring 56 provided on the outer circumferential surface of the water seal 50 is closely attached to the inner circumferential surface of the housing 20 to prevent moisture from flowing into the motor chamber 25 from the impeller chamber 22. Since the seal ring 56 is integrally formed with the water seal 50, the assembling property can be improved and the seal ring 56 can be assembled in the correct position at all times, thereby preventing quality defects due to misassembly.

As described above, in the automotive washer pump apparatus according to the present invention, since the impeller chamber and the motor chamber are constituted by a single housing, moisture resistance is improved as compared with the conventional coupling type housing by heat fusion, and the sealing member between the impeller chamber and the motor chamber, Since the seal is in direct contact with the inner circumferential surface of the housing and is sealed, a separate O-ring is not required, thereby eliminating the problem that the O-ring is assembled or assembled in an abnormal position. Further, since the seal ring integrally formed on the outer circumferential surface of the water seal does not require a separate O-ring assembly process in the water seal assembly process, productivity is improved. Further, as in the preferred embodiment of the present invention, since the coupling protrusion provided on the injection cover and the coupling groove provided on the water seal are combined, the water seal and the injection cover can be assembled into the housing in a preassembled state, . In addition, the reinforcing rib provided on the upper surface of the water seal prevents the water seal made of a stretchable material from being easily deformed, thereby improving water tightness.

While the present invention has been described with reference to the preferred embodiments, it is to be understood that the invention is not to be limited by the examples, and various changes and modifications may be made without departing from the spirit and scope of the invention.

10: Automobile washer pump device
20: Housing
22: impeller chamber
23: washer fluid inlet
24: Washer liquid outlet
25: Motor room
27: Shoulder portion
30: Impeller
40: motor
42: rotation axis of the motor
50: water seal
52: Sealing ball
54: reinforcing rib
55: injection cover accommodating portion
56: seal ring
58: engaging groove
60: injection cover
62: engaging projection
64: evasion ball
70: Terminal cap
71: O ring
72: Waterproof connector connection
74: Vents
75: Membrane member
76: Terminal terminal

Claims (5)

An impeller chamber provided with a washer fluid inlet and a washer fluid outlet, the impeller being accommodated and pressurized by the washer fluid; And
And a motor chamber disposed in the upper portion of the impeller chamber and provided with a motor for rotating the impeller,
Wherein the impeller chamber and the motor chamber are formed into a single housing,
Wherein a boundary between the motor chamber and the impeller chamber is provided with a stepped shoulder portion,
A water seal disposed between the motor chamber and the impeller chamber and made of a stretchable material that rotatably seals the rotation shaft of the motor; And
And an injection cover made of a synthetic resin, which is accommodated in a lower portion of the water seal and has a circumferential hole penetrating through the rotation shaft of the motor without contacting the rotation shaft, . The method according to claim 1,
And a seal ring protruding from an outer circumferential surface of the water seal and extending in the circumferential direction of the water seal, the seal ring integrally formed with the water seal. 3. The method of claim 2,
Wherein a plurality of the seal rings are provided so as to be spaced along the longitudinal direction of the housing. The method according to claim 1,
Wherein the injection cover has a plurality of coupling projections projected upward,
Wherein the water seal has a plurality of engaging recesses to be engaged with the engaging projections. The method according to claim 1,
Wherein a plurality of reinforcing ribs are provided on the upper surface of the water seal, the plurality of reinforcing ribs being spaced apart from each other around the sealing hole through which the rotation shaft of the motor passes.

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