Water pump shell with function of preventing foreign matters from entering and vehicle water pump

Abstract

The invention discloses a water pump shell with a foreign matter entering prevention function and a vehicle water pump, the water pump shell comprises a pump shell body, and a pump shell inner cavity, a water storage cavity and an exhaust channel which are mutually independent are formed in the pump shell body; a gap position between the first blanking cap and the pump shell body is expanded to form at least one overflow gap which extends along the radial direction of the first blanking cap; the gap position between the second blanking cap and the pump shell body is expanded to form at least one exhaust gap extending in the radial direction of the second blanking cap. The extension direction of the overflow seam of the water storage cavity is improved from the traditional vertical direction to the lateral direction, the second blanking cap is additionally arranged on the exhaust port of the exhaust channel, and the exhaust seam for lateral exhaust is formed between the second blanking cap and the pump shell body, so that the risk that foreign matters enter the exhaust channel is greatly reduced, and the service life of the pump shell is prolonged. And particularly, the risk that the foreign matter with the highest possibility does free falling motion and enters the exhaust channel through the exhaust gap is avoided, the service life of the water pump is prolonged, and the water pump can be free of maintenance in the service life cycle.

Description

Technical Field

[0001] The invention relates to the technical field of water pumps, and in particular to a water pump housing with a function of preventing foreign matter from entering and a vehicle water pump. Background Art

[0002] See also Figure 1 The existing mechanical water pump for a vehicle is usually provided with a water storage chamber and an exhaust passage 13. Both the water storage chamber and the exhaust passage 13 are open structures with top openings. The exhaust passage 13 is completely open, and the opening of the water storage chamber is blocked with a special plugging cover 8, leaving an overflow seam 3 with an opening facing upward on the side of the plugging cover.

[0003] During the installation, use and subsequent maintenance of the water pump, the applicant in this case discovered that not only during the transportation and installation process, foreign matter could easily enter through the top opening of the exhaust channel 13 and the overflow seam 3 at the top of the water storage chamber, thus causing quality problems with the water pump; but also during the life cycle of the water pump, which can be up to more than ten years, foreign matter could easily enter through the top opening of the exhaust channel 13 and the overflow seam 3 at the top of the water storage chamber, thus causing problems with frequent maintenance of the water pump and a short service life. Summary of the invention

[0004] In view of this, the present invention provides a water pump housing and a vehicle water pump with a function of preventing foreign matter from entering.

[0005] The technical solution is as follows:

[0006] The first aspect of the present application relates to a water pump casing with a function of preventing foreign matter from entering, comprising a pump casing body, wherein the interior of the pump casing body is formed with mutually independent pump casing inner cavity, water storage cavity and exhaust passage, the water storage cavity is connected with the pump casing inner cavity through an overflow hole, the exhaust passage is connected with the pump casing inner cavity through the exhaust hole, a water storage cavity opening is provided at the top of the water storage cavity, a first plugging cover is covered on the water storage cavity opening, and the characteristic is that: a gap position between the first plugging cover and the pump casing body is expanded to form at least one overflow gap extending radially along the first plugging cover, the inner end of each overflow gap is connected to the water storage cavity, and the outer end is evenly connected to the outside; an exhaust port is provided at the top of the exhaust passage, and a second plugging cover is covered on the exhaust port, a gap position between the second plugging cover and the pump casing body is expanded to form at least one exhaust gap extending radially along the second plugging cover, the inner end of each exhaust gap is connected to the exhaust passage, and the outer end is evenly connected to the outside.

[0007] Compared with the existing water pump casing, the water pump casing with the function of preventing foreign matter from entering the water storage chamber is adopted, which not only improves the extension direction of the overflow seam of the water storage chamber from the traditional vertical direction to the lateral direction (usually the horizontal direction), greatly reducing the risk of foreign matter entering the water storage chamber, especially avoiding the risk of the most likely foreign matter entering the water storage chamber through the overflow seam by free fall, but also adds a second plugging cover to the exhaust port of the exhaust channel, and at the same time, the second plugging cover and the pump casing body form an exhaust seam for lateral exhaust (usually the horizontal direction), which also greatly reduces the risk of foreign matter entering the exhaust channel, especially avoiding the risk of the most likely foreign matter entering the exhaust channel through the exhaust seam by free fall; therefore, the water pump casing is not only not prone to the quality problem of foreign matter entering the water storage chamber and the exhaust channel during the transportation and installation process, but also foreign matter is not easy to enter the water storage chamber and the exhaust channel during the entire life cycle of the water pump, which not only extends the service life of the water pump, but also enables the water pump to achieve maintenance-free during its life cycle.

[0008] In some embodiments, the first blocking cover has a first bowl-shaped portion embedded in the water storage cavity opening, the circumferential outer edge of the first bowl-shaped portion is folded outward to form a first annular flange extending radially outward, the pump housing body is formed with a first annular support surface adapted to the first annular flange around the water storage cavity opening, and the bottom surface of the first annular flange abuts against the first annular support surface;

[0009] The first annular support surface is recessed at the position of each overflow seam to form a first support surface pit, and each first support surface pit and the bottom surface of the first annular flange are combined to form the overflow seam.

[0010] In some embodiments, the outer edge of the first annular flange protrudes outward from the first annular supporting surface and then downwards to form a first blocking flange, and a gap is left between the first blocking flange and the outer wall of the pump housing body.

[0011] In some embodiments, the first blocking cover has a first bowl-shaped portion embedded in the water storage cavity opening, the circumferential outer edge of the first bowl-shaped portion is folded outward to form a first annular flange extending radially outward, the pump housing body is formed with a first annular support surface adapted to the first annular flange around the water storage cavity opening, and the bottom surface of the first annular flange abuts against the first annular support surface;

[0012] The bottom surface of the first annular flange is recessed at the position of each overflow seam to form a first flange pit, and each first flange pit and the first annular supporting surface are combined to form the overflow seam.

[0013] In some embodiments, the first blocking cover has a first bowl-shaped portion embedded in the water storage cavity opening, the circumferential outer edge of the first bowl-shaped portion is folded outward to form a first annular flange extending radially outward, the pump housing body is formed with a first annular support surface adapted to the first annular flange around the water storage cavity opening, and the bottom surface of the first annular flange abuts against the first annular support surface;

[0014] The first annular support surface is recessed at the position of part of the overflow seam to form first support surface pits, and each first support surface pit and the bottom surface of the first annular flange are surrounded to form the overflow seam;

[0015] The bottom surface of the first annular flange is recessed at the position of the remaining overflow seam to form a first flange pit, and each first flange pit and the first annular supporting surface are surrounded to form the overflow seam.

[0016] In some embodiments, the second plugging cover has a second bowl-shaped portion embedded in the exhaust port, the circumferential outer edge of the second bowl-shaped portion is folded outward to form a second annular flange extending radially outward, the pump housing body is formed with a second annular support surface adapted to the second annular flange around the exhaust port, the bottom surface of the second annular flange abuts against the second annular support surface, and each exhaust slit is formed in the gap between the second annular flange and the second annular support surface;

[0017] The second annular support surface is recessed at the position of each exhaust slit to form a second support surface pit, and each second support surface pit and the bottom surface of the second annular flange are combined to form the exhaust slit.

[0018] In some embodiments, the outer edge of the second annular flange protrudes outward from the second annular supporting surface and then downwards to form a second blocking flange, and a gap is left between the second blocking flange and the outer wall of the pump housing body.

[0019] In some embodiments, the second plugging cover has a second bowl-shaped portion embedded in the exhaust port, the circumferential outer edge of the second bowl-shaped portion is folded outward to form a second annular flange extending radially outward, the pump housing body is formed with a second annular support surface adapted to the second annular flange around the exhaust port, the bottom surface of the second annular flange abuts against the second annular support surface, and each exhaust slit is formed in the gap between the second annular flange and the second annular support surface;

[0020] The bottom surface of the second annular flange is recessed at the position of each exhaust slit to form a second flange pit, and each second flange pit and the second annular supporting surface are combined to form the exhaust slit.

[0021] In some embodiments, the second plugging cover has a second bowl-shaped portion embedded in the exhaust port, the circumferential outer edge of the second bowl-shaped portion is folded outward to form a second annular flange extending radially outward, the pump housing body is formed with a second annular support surface adapted to the second annular flange around the exhaust port, the bottom surface of the second annular flange abuts against the second annular support surface, and each exhaust slit is formed in the gap between the second annular flange and the second annular support surface;

[0022] The second annular support surface is recessed at the positions of some exhaust slits to form second support surface pits, and each second support surface pit and the bottom surface of the second annular flange are surrounded to form the exhaust slit;

[0023] The bottom surface of the second annular flange is recessed at the position of the remaining exhaust slits to form second flange pits, and each second flange pit and the second annular supporting surface are combined to form the exhaust slit.

[0024] The second aspect of the present application relates to a vehicle water pump, comprising the above-mentioned water pump casing with a function of preventing foreign matter from entering, an impeller shaft passing through the inner cavity of the pump casing, and bearings and water seals both mounted on the impeller shaft, the bearings and water seals being respectively located at the two ends of the inner cavity of the pump casing, the bearings being installed with an interference fit between the impeller shaft and the cavity wall of the inner cavity of the pump casing, sealing covers being provided at both ends of the outer ring of the bearing for sealing the gap between the outer ring and the impeller shaft, the water seal being used to seal the gap between the impeller shaft and the cavity wall of the inner cavity of the pump casing, and an impeller being synchronously rotated with one end of the impeller shaft passing through the water seal.

[0025] The above vehicle water pump not only has all the advantages of the above-mentioned water pump casing with the function of preventing foreign matter from entering, but also ensures the sealing performance of the inner cavity of the pump casing through the arrangement of the water seal and two sealing covers, and can effectively avoid leakage problems at the impeller shaft position. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of a traditional vehicle water pump;

[0027] Figure 2 is a cross-sectional view of a vehicle water pump of the present invention;

[0028] Figure 3 A schematic diagram of the structure of a vehicle water pump when both the overflow seam and the exhaust seam are in Embodiment 1;

[0029] Figure 4 A schematic diagram of the structure of a vehicle water pump when both the overflow seam and the exhaust seam are in Embodiment 2;

[0030] Figure 5 A schematic diagram of the structure of a vehicle water pump when both the overflow seam and the exhaust seam are in Embodiment 3;

[0031] Figure 6 A schematic diagram of the structure of a water pump casing when both the overflow seam and the exhaust seam are in Embodiment 1 and Embodiment 3;

[0032] Figure 7 A schematic structural diagram of the first plugging cover when both the overflow seam and the exhaust seam are in implementation mode 2;

[0033] Figure 8 A schematic structural diagram of the second plugging cover when both the overflow seam and the exhaust seam are in Embodiment 2;

[0034] Fig. 9 A schematic structural diagram of the first plugging cover when both the overflow seam and the exhaust seam are in implementation mode 3;

[0035] Fig.10 This is a schematic structural diagram of the second plugging cover when both the overflow seam and the exhaust seam are implemented in implementation mode 3. DETAILED DESCRIPTION

[0036] The present invention is further described below in conjunction with embodiments and drawings.

[0037] like Figure 3-Figure 10 As shown, a water pump casing with a function of preventing foreign matter from entering is mainly composed of a pump casing body 1, wherein the pump casing body 1 is internally formed with a pump casing inner cavity 11, a water storage cavity 12 and an exhaust passage 13 which are independent of each other, the water storage cavity 12 is communicated with the pump casing inner cavity 11 through an overflow hole 14, and the exhaust passage 13 is communicated with the pump casing inner cavity 11 through an exhaust hole 15. Usually, the overflow hole 14 extends obliquely upward from one end close to the pump casing inner cavity 11 to one end close to the water storage cavity 12 to prevent the liquid that can be absorbed internally from flowing into the water storage cavity 12. Similarly, the exhaust hole 15 also extends obliquely upward from one end close to the pump casing inner cavity 11 to one end close to the exhaust passage 13.

[0038] In this embodiment, a water storage cavity opening 121 is provided at the top of the water storage cavity 12, and a first plugging cover 2 is covered on the water storage cavity opening 121. The gap between the first plugging cover 2 and the pump housing body 1 is expanded to form at least one overflow slit 3 extending radially along the first plugging cover 2, that is, the overflow slit 3 can be one or more, and each overflow slit 3 preferably extends horizontally, and the inner end of each overflow slit 3 is connected to the water storage cavity 12, and the outer end of each overflow slit 3 is evenly connected to the outside. Therefore, the liquid in the pump housing inner cavity 11 can be discharged into the water storage cavity 12 through the overflow hole 14, and the liquid in the water storage cavity 12 will overflow outward through the overflow slit 3 after it is full.

[0039] Similarly, an exhaust port 131 is provided at the top of the exhaust channel 13, and a second plugging cover 4 is closed on the exhaust port 131. The gap between the second plugging cover 4 and the pump housing body 1 is expanded to form at least one exhaust slit 9 extending radially along the second plugging cover 4. The exhaust slit 9 can be one or more, and each exhaust slit 9 preferably extends horizontally. The inner end of each exhaust slit 9 is connected to the exhaust channel 13, and the outer end of each exhaust slit 9 is evenly connected to the outside. Therefore, the gas in the pump housing inner cavity 11 can be discharged into the exhaust channel 13 through the exhaust hole 15, and then discharged to the outside.

[0040] Compared with the existing water pump casing, the water pump casing with the function of preventing foreign matter from entering the water storage chamber 12 in the present embodiment not only improves the extension direction of the overflow seam 3 of the water storage chamber 12 from the traditional vertical direction to the lateral direction (usually the horizontal direction), thereby greatly reducing the risk of foreign matter entering the water storage chamber 12, and especially avoiding the risk of the most likely foreign matter entering the water storage chamber 12 through the overflow seam 3 by free fall, but also installs a second plugging cover 4 on the exhaust port 131 of the exhaust channel 13, and at the same time, the second plugging cover 4 and the pump casing body 1 form an exhaust seam 9 for lateral exhaust (usually the horizontal direction), which also greatly reduces the risk of foreign matter entering the exhaust channel 13, and especially avoids the risk of the most likely foreign matter entering the exhaust channel 13 by free fall through the exhaust seam 9; therefore, the water pump casing is not only not prone to the quality problem of foreign matter entering the water storage chamber 12 and the exhaust channel 13 during the transportation and installation process, but also foreign matter is not easy to enter the water storage chamber 12 and the exhaust channel 13 during the entire life cycle of the water pump, which not only prolongs the service life of the water pump, but also enables the water pump to be maintenance-free during its life cycle.

[0041] See also Figure 3-Figure 7 as well as Fig. 9 The first plugging cover 2 has a first bowl-shaped portion 21 embedded in the water storage chamber opening 121. The circumferential outer edge of the first bowl-shaped portion 21 is folded outward to form a first annular flange 22 extending radially outward. The pump housing body 1 is formed with a first annular support surface 15 adapted to the first annular flange 22 around the water storage chamber opening 121. The bottom surface of the first annular flange 22 abuts against the first annular support surface 15. Each overflow seam 3 is formed in the gap between the first annular flange 22 and the first annular support surface 15, which not only ensures the reliable installation and sealing performance of the first plugging cover 2, but also facilitates the formation of the overflow seam 3. Specifically, the overflow seam 3 has the following three implementations:

[0042] Overflow seam 3 implementation method 1:

[0043] See also Figure 3 and Figure 6The first annular support surface 15 is recessed at a position corresponding to the overflow seam 3 to form a first support surface concave pit 151, and the first support surface concave pit 151 and the bottom surface of the first annular flange 22 are combined to form the overflow seam 3. The first plugging cover 2 of this embodiment is easy to process and shape.

[0044] Furthermore, in order to ensure the smooth flow of the overflow seam 3, a first pit extension section 122 is formed on the wall of the water storage chamber 12 and extends along the vertical direction to the first support surface pit 151, so that the liquid in the water storage chamber 12 can flow out smoothly from the overflow seam 3, avoiding damage to the stability and reliability of the installation of the first blocking cover 2.

[0045] Overflow seam 3 implementation method 2:

[0046] See also Figure 4 and Figure 7 The bottom surface of the first annular flange 22 is recessed at a position corresponding to the overflow seam 3 to form a first flange pit 221, and the first flange pit 221 and the first annular support surface 15 together form the overflow seam 3. This embodiment can improve the processing accuracy of the pump housing body 1 and reduce the processing difficulty of the pump housing body 1.

[0047] Among them, the first annular flange 22 is formed with an upwardly protruding first flange bulge 222 at the position corresponding to the first flange pit 221 by stamping, and each first flange bulge 222 forms a first flange pit 221 on the bottom surface of the first annular flange 22, with simple processing technology and low cost.

[0048] Furthermore, in order to ensure the smooth flow of the overflow seam 3, a second pit extension section 211 is formed on the outer wall of the first bowl-shaped portion 21 and extends in the vertical direction to the first flange pit 221, so that the liquid in the water storage chamber 12 can flow out smoothly from the overflow seam 3, avoiding damage to the stability and reliability of the installation of the first blocking cover 2.

[0049] Overflow seam 3 implementation method 3:

[0050] See also Figure 5 , Figure 6 and Fig. 9 The overflow seam 3 of this embodiment is optimized on the basis of the overflow seam 3 embodiment 1. Specifically, the outer edge of the first annular flange 22 protrudes outward from the first annular support surface 15 and then forms a first blocking flange 23 downward. A gap is left between the first blocking flange 23 and the outer wall of the pump housing body 1. Therefore, the liquid overflowing from the overflow seam 3 flows out through the gap between the first blocking flange 23 and the outer wall of the pump housing body 1. Through such a design, the first blocking flange 23 can not only shield the outer end of the overflow seam 3, further improving the possibility of preventing foreign matter from entering the overflow seam 3, but also will not affect the smoothness of the liquid overflowing from the overflow seam 3, which is extremely clever.

[0051] Furthermore, a first clearance notch 231 adapted to the corresponding rib on the pump casing body 1 is formed on the first blocking flange 23 , thereby ensuring the stability and reliability of the installation of the first blocking cover 2 .

[0052] It should be pointed out that when there are multiple overflow seams 3, all of the overflow seams 3 can be overflow seam 3 implementation mode 1, all of the overflow seams 3 can be overflow seam 3 implementation mode 2, all of the overflow seams 3 can be overflow seam 3 implementation mode 3, and all of the overflow seams 3 can be composed of two or three overflow seam 3 implementation modes. It can be selected according to actual needs (such as requirements for spatial position interference, etc.), which has high flexibility.

[0053] Furthermore, when a plurality of overflow seams 3 are provided, the overflow seams 3 may be evenly distributed along the circumferential direction, or may be concentratedly distributed at positions close to the inner cavity 11 of the pump casing, which can improve the effect of preventing foreign matter from entering.

[0054] See also Figure 3-Figure 6 as well as Figure 8 and Fig.10 The second plugging cover 4 has a second bowl-shaped portion 41 embedded in the exhaust port 131, and the circumferential outer edge of the second bowl-shaped portion 41 is folded outward to form a second annular flange 42 extending radially outward. The pump housing body 1 is formed with a second annular support surface 16 adapted to the second annular flange 42 around the exhaust port 131, and the bottom surface of the second annular flange 42 abuts against the second annular support surface 16. Each exhaust slit 9 is formed in the gap between the second annular flange 42 and the second annular support surface 16, which not only ensures the reliable installation and sealing performance of the second plugging cover 4, but also facilitates the molding of the exhaust slit 9. Specifically, the exhaust slit 9 has the following three implementations:

[0055] Exhaust seam 9 implementation method 1:

[0056] See also Figure 3 and Figure 6 The second annular support surface 16 is recessed at the position corresponding to the exhaust slit 9 to form a second support surface concave pit 161, and the second support surface concave pit 161 and the bottom surface of the second annular flange 42 are combined to form the exhaust slit 9. The second plugging cover 4 of this embodiment is easy to process and shape.

[0057] Furthermore, in order to ensure the smooth flow of the exhaust gap 9, a third pit extension section 132 is formed on the circumferential side wall of the exhaust channel 13 and extends in the vertical direction to the second support surface pit 161, so that the gas in the exhaust channel 13 can be smoothly discharged from the exhaust gap 9, avoiding damage to the stability and reliability of the installation of the second blocking cover 4.

[0058] Exhaust seam 9 implementation method 2:

[0059] See also Figure 4 and Figure 8 The bottom surface of the second annular flange 42 is concave at the position corresponding to the exhaust slit 9 to form a second flange pit 421, and the second flange pit 421 and the second annular support surface 16 together form the exhaust slit 9. This embodiment can improve the processing accuracy of the pump housing body 1 and reduce the processing difficulty of the pump housing body 1.

[0060] Among them, the second annular flange 42 is formed with an upwardly protruding second flange bulge 422 at the position corresponding to the second flange pit 421 by stamping, and each second flange bulge 422 forms a second flange pit 421 on the bottom surface of the second annular flange 42, with simple processing technology and low cost.

[0061] Furthermore, in order to ensure the smooth flow of the exhaust slit 9, a fourth pit extension section 411 is formed on the outer wall of the second bowl-shaped portion 41 and extends in the vertical direction to the second flange pit 421, so that the gas in the exhaust channel 13 can be smoothly discharged from the exhaust slit 9, avoiding damage to the stability and reliability of the installation of the second blocking cover 4.

[0062] Exhaust seam 9 implementation method 3:

[0063] See also Figure 5 , Figure 6 and Fig.10 The exhaust slit 9 of this embodiment is optimized on the basis of the exhaust slit 9 embodiment 1. Specifically, the outer edge of the second annular flange 42 protrudes outward from the second annular support surface 16 and then forms a second blocking flange 43 downward. A gap is left between the second blocking flange 43 and the outer wall of the pump housing body 1. Therefore, the gas overflowing from the exhaust slit 9 flows out through the gap between the second blocking flange 43 and the outer wall of the pump housing body 1. Through such a design, the second blocking flange 43 can not only shield the outer end of the exhaust slit 9, further improving the possibility of preventing foreign matter from entering the exhaust slit 9, but also will not affect the smoothness of the gas overflowing from the exhaust slit 9, which is extremely clever.

[0064] Furthermore, a second clearance notch 431 is provided on the second blocking flange 43 and matches with the corresponding convex rib on the pump housing body 1 , thereby ensuring the stability and reliability of the installation of the second blocking cover 4 .

[0065] It should be pointed out that when there are multiple exhaust slits 9, all of the exhaust slits 9 can be exhaust slit 9 implementation mode 1, all of the exhaust slits 9 can be exhaust slit 9 implementation mode 2, all of the exhaust slits 9 can be exhaust slit 9 implementation mode 3, and all of the exhaust slits 9 can be composed of two or three exhaust slit 9 implementation modes. It can be selected according to actual needs (such as requirements for spatial position interference, etc.), which has high flexibility.

[0066] Furthermore, when a plurality of exhaust slits 9 are provided, the exhaust slits 9 may be evenly distributed along the circumferential direction, or may be concentratedly distributed at positions close to the inner cavity 11 of the pump casing, which can improve the effect of preventing foreign matter from entering.

[0067] It should be pointed out that the pump casing body 1 of the present embodiment is integrally formed by a casting process and has high structural strength.

[0068] Embodiment 2:

[0069] See also Figure 2-Figure 5 A vehicle water pump comprises a water pump casing with a function of preventing foreign matter from entering according to embodiment 1, an impeller shaft 5 passing through an inner cavity 11 of the pump casing, and a bearing 6 and a water seal 7 both mounted on the impeller shaft 5. The bearing 6 and the water seal 7 are respectively located at two ends of the inner cavity 11 of the pump casing. The bearing 6 is installed between the impeller shaft 5 and the cavity wall of the inner cavity 11 of the pump casing with an interference fit. Both ends of an outer ring 61 of the bearing 6 are provided with sealing covers 62 for sealing the gap between the outer ring 61 and the impeller shaft 5. The water seal 7 is used to seal the gap between the impeller shaft 5 and the cavity wall of the inner cavity 11 of the pump casing. An end of the impeller shaft 5 passing through the water seal 7 is synchronously rotated with an impeller 8 mounted thereon.

[0070] The above structure ensures the sealing performance of the inner cavity 11 of the pump casing by providing the water seal 7 and the two sealing covers 62 , and can effectively avoid the problem of liquid leakage at the position of the impeller shaft 5 .

[0071] Finally, it should be noted that the above description is only a preferred embodiment of the present invention. Under the guidance of the present invention, ordinary technicians in this field can make various similar expressions without violating the purpose and claims of the present invention, and such changes all fall within the scope of protection of the present invention.

Claims

1. A water pump casing with a function of preventing foreign matter from entering, comprising a pump casing body, wherein the pump casing body is internally formed with a pump casing inner cavity, a water storage cavity and an exhaust passage which are independent of each other, wherein the water storage cavity is communicated with the pump casing inner cavity through a water overflow hole, and the exhaust passage is communicated with the pump casing inner cavity through an exhaust hole, and a water storage cavity opening is formed at the top of the water storage cavity, and a first plugging cover is closed on the water storage cavity opening, wherein: The gap between the first blocking cover and the pump casing body is expanded to form at least one overflow gap extending radially along the first blocking cover, the inner end of each overflow gap is connected to the water storage chamber, and the outer end is connected to the outside world; an exhaust port is provided at the top of the exhaust channel, and a second blocking cover is covered on the exhaust port. The gap between the second blocking cover and the pump casing body is expanded to form at least one exhaust gap extending radially along the second blocking cover, the inner end of each exhaust gap is connected to the exhaust channel, and the outer end is connected to the outside world.

2. The water pump housing with foreign matter-proof function according to claim 1, characterized in that: The first blocking cover has a first bowl-shaped portion embedded in the water storage cavity opening, the circumferential outer edge of the first bowl-shaped portion is folded outward to form a first annular flange extending radially outward, the pump housing body is formed with a first annular support surface adapted to the first annular flange around the water storage cavity opening, and the bottom surface of the first annular flange abuts against the first annular support surface; The first annular support surface is recessed at the position of each overflow seam to form a first support surface pit, and each first support surface pit and the bottom surface of the first annular flange are combined to form the overflow seam.

3. The water pump housing with foreign matter-proof function according to claim 2, characterized in that: The outer edge of the first annular flange protrudes outward from the first annular supporting surface and then downwards to form a first blocking flange, and a gap is left between the first blocking flange and the outer wall of the pump housing body.

4. The water pump housing with foreign matter-proof function according to claim 1, characterized in that: The first blocking cover has a first bowl-shaped portion embedded in the water storage cavity opening, the circumferential outer edge of the first bowl-shaped portion is folded outward to form a first annular flange extending radially outward, the pump housing body is formed with a first annular support surface adapted to the first annular flange around the water storage cavity opening, and the bottom surface of the first annular flange abuts against the first annular support surface; The bottom surface of the first annular flange is recessed at the position of each overflow seam to form a first flange pit, and each first flange pit and the first annular supporting surface are combined to form the overflow seam.

5. The water pump housing with foreign matter-proof function according to claim 1, characterized in that: The first blocking cover has a first bowl-shaped portion embedded in the water storage cavity opening, the circumferential outer edge of the first bowl-shaped portion is folded outward to form a first annular flange extending radially outward, the pump housing body is formed with a first annular support surface adapted to the first annular flange around the water storage cavity opening, and the bottom surface of the first annular flange abuts against the first annular support surface; The first annular support surface is recessed at the position of part of the overflow seam to form first support surface pits, and each first support surface pit and the bottom surface of the first annular flange are surrounded to form the overflow seam; The bottom surface of the first annular flange is recessed at the position of the remaining overflow seam to form a first flange pit, and each first flange pit and the first annular supporting surface are surrounded to form the overflow seam.

6. The water pump housing with foreign matter-proof function according to claim 1, characterized in that: The second plugging cover has a second bowl-shaped portion embedded in the exhaust port, the circumferential outer edge of the second bowl-shaped portion is folded outward to form a second annular flange extending radially outward, the pump housing body is formed with a second annular support surface adapted to the second annular flange around the exhaust port, the bottom surface of the second annular flange abuts against the second annular support surface, and each exhaust slit is formed in the gap between the second annular flange and the second annular support surface; The second annular support surface is recessed at the position of each exhaust slit to form a second support surface pit, and each second support surface pit and the bottom surface of the second annular flange are combined to form the exhaust slit.

7. The water pump housing with foreign matter-proof function according to claim 6, characterized in that: The outer edge of the second annular flange protrudes outwards from the second annular supporting surface and then downwards to form a second blocking flange, and a gap is left between the second blocking flange and the outer wall of the pump housing body.

8. The water pump housing with foreign matter-proof function according to claim 1, characterized in that: The second plugging cover has a second bowl-shaped portion embedded in the exhaust port, the circumferential outer edge of the second bowl-shaped portion is folded outward to form a second annular flange extending radially outward, the pump housing body is formed with a second annular support surface adapted to the second annular flange around the exhaust port, the bottom surface of the second annular flange abuts against the second annular support surface, and each exhaust slit is formed in the gap between the second annular flange and the second annular support surface; The bottom surface of the second annular flange is recessed at the position of each exhaust slit to form a second flange pit, and each second flange pit and the second annular supporting surface are combined to form the exhaust slit.

9. The water pump housing with foreign matter-proof function according to claim 1, characterized in that: The second plugging cover has a second bowl-shaped portion embedded in the exhaust port, the circumferential outer edge of the second bowl-shaped portion is folded outward to form a second annular flange extending radially outward, the pump housing body is formed with a second annular support surface adapted to the second annular flange around the exhaust port, the bottom surface of the second annular flange abuts against the second annular support surface, and each exhaust slit is formed in the gap between the second annular flange and the second annular support surface; The second annular support surface is recessed at the positions of some exhaust slits to form second support surface pits, and each second support surface pit and the bottom surface of the second annular flange are surrounded to form the exhaust slit; The bottom surface of the second annular flange is recessed at the position of the remaining exhaust slits to form second flange pits, and each second flange pit and the second annular supporting surface are combined to form the exhaust slit.

10. A vehicle water pump, characterized in that: It comprises a water pump casing with a function of preventing foreign matter from entering as described in any one of claims 1 to 9, an impeller shaft passing through an inner cavity of the pump casing, and a bearing and a water seal both mounted on the impeller shaft, wherein the bearing and the water seal are respectively located at two ends of the inner cavity of the pump casing, the bearing is installed with an interference fit between the impeller shaft and the cavity wall of the inner cavity of the pump casing, both ends of the outer ring of the bearing are provided with sealing covers for sealing the gap between the outer ring and the impeller shaft, the water seal is used to seal the gap between the impeller shaft and the cavity wall of the inner cavity of the pump casing, and one end of the impeller shaft passing through the water seal is synchronously rotatably mounted with an impeller.

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