Waterproof cover plate of electric pump and electric pump

Abstract

The invention provides an electric pump waterproof cover plate and an electric pump, the electric pump waterproof cover plate comprises a cover plate body and a semi-permeable membrane, the cover plate body is provided with an air hole, the inner side of the cover plate body is provided with an annular protrusion, the annular protrusion is arranged around the air hole, and the side, away from the cover plate body, of the annular protrusion is provided with a wrinkled surface; and the semi-permeable membrane is fixedly connected to the wrinkled surface. According to the electric waterproof cover plate, the wrinkled surface is arranged on the side, away from the cover plate body, of the annular protrusion, the contact area of the semi-permeable membrane and the wrinkled surface is increased, the connection stability between the semi-permeable membrane and the annular protrusion on the waterproof cover plate is improved, through cracks between the semi-permeable membrane and the annular protrusion are prevented, and therefore the service life of the electric waterproof cover plate is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, and in particular to an electric pump waterproof cover plate and an electric pump. Background Art

[0002] Electronic water pumps are widely used in new energy vehicles. With the rapid development of new energy electric vehicles, the performance requirements for electric vehicle components are getting higher and higher. At present, as an important component of the cooling system, the electronic water pump has an important impact on the performance of the vehicle and is a key and indispensable component to ensure the safety performance of the vehicle. Most of the current electric actuators are driven by motors, which are controlled and executed by the on-board ECU (electronic control unit). The ECU is composed of a printed circuit board and supporting software. The printed circuit board is very sensitive to the humidity and cleanliness of the environment. If the humidity is too high or the cleanliness of the environment is not up to standard, it is easy to cause water molecules or impurities in the air to adhere to the printed circuit board, which may cause the circuit on the printed circuit board to short-circuit and then damage the printed circuit board, seriously affecting the stability and service life of the ECU.

[0003] Existing equipment usually sets air holes on the cover plate, and sets a semipermeable membrane at the air holes (the semipermeable membrane has the function of allowing air molecules to pass through but preventing water molecules from passing through), and the air holes are sealed by the semipermeable membrane, thereby ensuring that the electronic water pump is always in a low humidity state. The existing semipermeable membrane is generally flat on the air holes to seal the air holes, but the problem that this will cause is that when the air in the electronic water pump expands and contracts, the semipermeable membrane will bulge inward or outward, and as the thermal expansion and contraction continue, the connection between the semipermeable membrane and the cover plate at the air hole is prone to loosening, resulting in a gap between the semipermeable membrane and the cover plate, which in turn causes the gas in the electronic water pump to communicate with the outside world through the gap. At this time, external water vapor can easily enter the inside of the electronic water pump through the gap, and the semipermeable membrane fails.

[0004] In summary, there is an urgent need for an electric pump waterproof cover and an electric pump to solve or at least partially solve the problems existing in the prior art. Summary of the invention

[0005] The present invention aims to provide a waterproof cover plate for an electric pump, aiming to solve the problem that a gap is easily formed between the existing semipermeable membrane and the cover plate, which causes water vapor to enter the electronic water pump. The specific technical solution is as follows:

[0006] A waterproof cover for an electric pump comprises a cover body and a semipermeable membrane. The cover body is provided with air holes. An annular protrusion is provided on the inner side of the cover body. The annular protrusion is arranged around the air hole. The side of the annular protrusion away from the cover body is provided as a pleated surface. The semipermeable membrane is fixedly connected to the pleated surface.

[0007] Furthermore, the semipermeable membrane is fixedly connected to the folded surface of the annular protrusion by means of hot-melt welding.

[0008] Preferably, the pleated surface includes a first slope and a second slope, the first slope and the second slope are arranged at an angle to each other, the tops of the first slope and the second slope intersect, and the semipermeable membrane is fixedly connected to the first slope and the second slope in sequence.

[0009] Preferably, the pleated surface includes a plane, a third slope and a fourth slope, one side of the plane is connected to the third slope, the other side of the plane is connected to the fourth slope, and the semipermeable membrane is fixedly connected to the third slope, the plane and the fourth slope in sequence.

[0010] Preferably, the corrugated surface is a wavy surface, and the edge of the semipermeable membrane is fitted and connected to the wavy surface.

[0011] Furthermore, a boss is provided at the air hole on the cover body, the boss is provided on the side of the air hole away from the semi-permeable membrane, a branch hole is provided on the boss, the first end of the branch hole is connected to the air hole, and the second end of the branch hole extends from the side wall of the boss and is connected to the outside.

[0012] Furthermore, it also includes a filter cover, which is sleeved on the outer side of the boss.

[0013] Furthermore, a card block or a card slot is provided on the filter cover, and a card slot or a card block is provided on the outer wall of the boss, and the filter cover is fixedly connected to the outer side of the boss by engaging the card block with the card slot; or a first magnetic block is provided on the filter cover, and a second magnetic block is provided on the cover body, and the second magnetic block is provided around the boss, the first magnetic block is magnetically fixedly connected to the second magnetic block, and the filter cover is fixedly connected to the outer side of the boss by magnetically fixing the first magnetic block to the second magnetic block.

[0014] Furthermore, a sink groove is provided on the cover plate body, the sink groove is arranged around the outer side of the boss, and the branch hole is provided close to the bottom wall of the sink groove.

[0015] The application of the technical solution of the present invention has the following beneficial effects:

[0016] By setting a pleated surface on the side of the annular protrusion away from the cover body, on the one hand, by setting it as a pleated surface, it is beneficial to increase the contact area between the semipermeable membrane and the pleated surface, and on the other hand, the bonding strength between the pleated surface and the semipermeable membrane is higher, and it is not easy to crack along the pleated surface. It is worth noting that under normal circumstances, the semipermeable membrane is in a tensioned state. When a slight crack occurs between the semipermeable membrane and the pleated surface, because the pleated surface is an uneven surface or composed of multiple surfaces, the semipermeable membrane at the crack changes from an uneven state to a flat state, and when the semipermeable membrane changes from an uneven state to a flat state, the extra semipermeable membrane will move toward the direction of the semipermeable membrane that is tensioned in the middle, making the tensioned semipermeable membrane loose, and the semipermeable membrane in the relaxed state has a poor force transmission effect, and it is not easy to transmit the tension to the connection between the semipermeable membrane and the cover body, thereby hindering the further development of the crack, preventing the formation of a through gap between the semipermeable membrane and the cover body, and improving the service life of the waterproof cover of the electric pump.

[0017] In addition, the present application also provides an electric pump, including the above-mentioned electric waterproof cover.

[0018] In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. Figure 1-Figure 9 , the present invention is further described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0020] Figure 1 This is a schematic diagram of the internal structure of a waterproof cover plate for an electric pump according to Example 1 of the present application;

[0021] Figure 2 This is an enlarged view of the interior of a waterproof cover plate for an electric pump according to Example 1 of the present application;

[0022] Figure 3 yes Figure 2 Magnified view at A in the middle;

[0023] Figure 4 This is one of the overall structural schematic diagrams of an electric pump waterproof cover plate in Example 1 of the present application;

[0024] Figure 5 This is the second schematic diagram of the overall structure of an electric pump waterproof cover plate in Example 1 of the present application;

[0025] Figure 6 This is a partial enlarged view of the interior of a waterproof cover plate for an electric pump according to Example 2 of the present application;

[0026] Figure 7This is a partial enlarged view of the interior of a waterproof cover plate for an electric pump according to Example 3 of the present application;

[0027] Figure 8 It is a partial enlarged view of the interior of a waterproof cover plate of an electric pump according to Example 4 of the present application;

[0028] Fig. 9 This is a schematic diagram of the overall structure of an electric pump according to Example 5 of the present application.

[0029] Among them, 1. cover plate body; 11. air vent; 12. annular protrusion; 121. pleated surface; 1211. first inclined surface; 1212. second inclined surface; 1213. plane; 1214. third inclined surface; 1215. fourth inclined surface; 13. boss; 131. branch hole; 14. second magnetic block; 15. sink; 2. semi-permeable membrane; 3. filter cover; 31. first magnetic block; 4. pump casing. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, the present invention will be described more fully below, and preferred embodiments of the present invention are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0032] Embodiment 1:

[0033] See also Figure 1-Figure 5 The present embodiment provides a waterproof cover for an electric pump, comprising a cover body 1 and a semipermeable membrane 2. The cover body 1 is provided with an air hole 11. An annular protrusion 12 is provided on the inner side of the cover body 1. The annular protrusion 12 is arranged around the air hole 11. A pleated surface 121 is provided on the side of the annular protrusion 12 away from the cover body 1. The semipermeable membrane 2 is fixedly connected to the pleated surface 121.

[0034] It can be known that the waterproof cover plate of the electric pump can realize the waterproof and breathable function by setting the semipermeable membrane 2. In addition, by setting the pleated surface 121 on the side of the annular protrusion 12 away from the cover plate body 1, on the one hand, by setting the pleated surface 121, it is helpful to increase the contact area between the semipermeable membrane 2 and the pleated surface 121, and on the other hand, the bonding strength between the pleated surface 121 and the semipermeable membrane 2 is higher, and it is not easy to crack along the pleated surface 121. It is worth noting that, under normal circumstances, the semipermeable membrane 2 is in a tensioned state. When a slight crack occurs between the semipermeable membrane 2 and the pleated surface 121, because the pleated surface 121 is an uneven surface or a combination of multiple surfaces, the semipermeable membrane 2 at the crack changes from an uneven state to a flat state. When the semipermeable membrane 2 changes from an uneven state to a flat state, the extra semipermeable membrane 2 will move toward the direction of the tensioned semipermeable membrane 2 in the middle, causing the tensioned semipermeable membrane 2 to become relaxed. The semipermeable membrane 2 in a relaxed state has a poor force transmission effect, and it is not easy to transmit the tension to the connection between the semipermeable membrane 2 and the cover body 1, thereby hindering the further development of the crack, preventing the formation of a through gap between the semipermeable membrane 2 and the cover body 1, and improving the service life of the electric pump waterproof cover.

[0035] Furthermore, the semipermeable membrane 2 is fixedly connected to the wrinkled surface 121 of the annular protrusion 12 by means of hot-melt welding.

[0036] It can be known that the semipermeable membrane 2 is fixedly connected to the annular protrusion 12 by hot-melt welding, so that the semipermeable membrane 2 is more firmly fixed than by gluing, and is less likely to have defects such as cracks.

[0037] Preferably, the pleated surface 121 includes a first slope 1211 and a second slope 1212 , which are arranged at an angle to each other, and the tops of the first slope 1211 and the second slope 1212 intersect, and the semipermeable membrane 2 is fixedly connected to the first slope 1211 and the second slope 1212 in sequence.

[0038] Specifically, in the present embodiment, the first inclined surface 1211 and the second inclined surface 1212 are both conical surfaces, and the intersection line of the first inclined surface 1211 and the second inclined surface 1212 is a circle. It can be known that, through the arrangement of the first inclined surface 1211 and the second inclined surface 1212, the edge portion of the semipermeable membrane 2 located on the inner side of the intersection line is attached to the first inclined surface 1211, and the portion of the semipermeable membrane 2 located on the outer side of the intersection line is attached to the second inclined surface 1212. The attachment of the semipermeable membrane 2 to the first inclined surface 1211 and the second inclined surface 1212 increases the contact area between the semipermeable membrane 2 and the boss 13, and improves the stability of the connection between the semipermeable membrane 2 and the boss. It is also worth noting that when the part of the semipermeable membrane 2 on the inner side of the intersection line becomes loose due to the action of air that expands and contracts due to heat, the semipermeable membrane 2 that is stretched in the middle part will become loose. After becoming loose, the force transmitted to the outside of the intersection line by the semipermeable membrane 2 will be weakened, so that it is not easy for cracks to appear between the part of the semipermeable membrane 2 located outside the intersection line and the annular protrusion 12, which is beneficial to improve the connection stability between the semipermeable membrane 2 and the annular protrusion 12, and is beneficial to reduce the failure caused by the through cracks between the semipermeable membrane 2 and the annular protrusion 12.

[0039] It should be noted that, in the present application, the surface of the semipermeable membrane 2 located in the middle of the air hole 11 is a plane 1213. In some other embodiments of the present application, the surface of the semipermeable membrane 2 located in the middle of the air hole 11 is a corrugated surface, and the provision of the corrugated surface increases the air permeability area of ​​the semipermeable membrane 2, making the air permeation smoother.

[0040] Furthermore, a boss 13 is provided at the air hole 11 on the cover body 1, and the boss 13 is provided on a side of the air hole 11 away from the semi-permeable membrane 2. A branch hole 131 is provided on the boss 13, and a first end of the branch hole 131 is connected to the air hole 11, and a second end of the branch hole 131 extends from a side wall of the boss 13 and is connected to the outside.

[0041] Specifically, a plurality of branch holes 131 are provided, and the plurality of branch holes 131 are arranged along the circumference of the boss 13 , and a diameter of the branch hole 131 is smaller than a diameter of the air vent 11 .

[0042] It can be known that if the air vent 11 is not provided with the boss 13, because the diameter of the air vent 11 is relatively large, water vapor and dust particles in the air can easily form convection directly through the air vent 11 and move toward the semipermeable membrane 2, so that the dust particles and fine water droplets in the air adhere to the semipermeable membrane 2, forming a blockage on the semipermeable membrane 2 and affecting the air permeability of the semipermeable membrane 2.

[0043] The boss 13 is provided to block the convection between the outside air and the air vent 11, and a branch hole 131 is provided on one side of the boss 13. The aperture of the branch hole 131 is smaller than the diameter of the air vent 11. The branch hole 131 slows down the convection flow of the airflow, thereby reducing the amount of dust particles from the outside from entering the air vent 11.

[0044] Furthermore, it also includes a filter cover 3, which is sleeved on the outside of the boss 13.

[0045] It should be noted that the semipermeable membrane 2 is provided with dense micropores, and air molecules can pass through the micropores smoothly, while water molecules and dust particles in the air cannot pass through the micropores, thereby achieving waterproof, breathable and dustproof properties.

[0046] It is known that there are a large number of dust particles in the air. Although the dust particles cannot pass through the micropores, they are easy to accumulate at the openings of the micropores, forming a blockage for the micropores. As the number of blocked micropores increases, the air permeability of the micropores decreases, which easily causes the semipermeable membrane 2 to fail, seriously affecting the service life of the semipermeable membrane 2. By arranging the filter cover 3 outside the boss 13, the air is initially filtered, and most of the dust particles are blocked outside the filter cover 3, thereby preventing the dust particles in the air from clogging the micropores of the semipermeable membrane 2 and extending the service life of the semipermeable membrane 2.

[0047] Furthermore, a card block is provided on the filter cover 3, and a card slot is provided on the outer wall of the boss 13, and the filter cover 3 is fixedly connected to the outer side of the boss 13 by engaging the card block with the card slot. Of course, in some other embodiments of the present application, a card slot can also be provided on the filter cover 3, and a card block can be provided on the outer wall of the boss 13.

[0048] It can be known that the filter cover 3 can be firmly fixed to the boss 13 through the cooperation of the block and the slot, and the cooperation of the block and the slot makes it convenient to replace the filter cover 3.

[0049] Furthermore, a sink 15 is provided on the cover body 1 , and the sink 15 is arranged around the outside of the boss 13 so that the boss 13 is located in the sink 15 , and the branch hole 131 is arranged close to the bottom wall of the sink 15 .

[0050] It can be known that, by providing the trough 15 , the convection of the air outside the boss 13 is further reduced, thereby reducing the dust in the air from entering the trough 15 , thereby increasing the service life of the filter cover 3 .

[0051] Embodiment 2:

[0052] Reference Figure 6The difference between this embodiment and embodiment 1 is that the filter cover 3 of this embodiment is different. In this embodiment, a first magnetic block 31 is fixedly connected to the filter cover 3, a second magnetic block 14 is fixedly connected to the cover body 1, and the second magnetic block 14 is arranged around the boss 13. The first magnetic block 31 is magnetically fixedly connected to the second magnetic block 14, and the filter cover 3 is fixedly connected to the outside of the boss 13 by magnetically fixing the first magnetic block 31 and the second magnetic block 14.

[0053] It can be known that the filter cover 3 can be conveniently installed on the outer periphery of the boss 13 by the attraction of the first magnetic block 31 and the second magnetic block 14, and the filter cover 3 can be conveniently replaced by the attraction of the first magnetic block 31 and the second magnetic block 14.

[0054] Embodiment 3:

[0055] Reference Figure 7 The difference between this embodiment and embodiment 1 is that the pleated surface 121 of this embodiment is different. In this embodiment, the pleated surface 121 includes a plane 1213, a third inclined surface 1214 and a fourth inclined surface 1215. One side of the plane 1213 is connected to the third inclined surface 1214, and the other side of the plane 1213 is connected to the fourth inclined surface 1215. The semipermeable membrane 2 is fixedly connected to the third inclined surface 1214, the plane 1213 and the fourth inclined surface 1215 in sequence.

[0056] It can be known that the third inclined surface 1214 and the fourth inclined surface 1215 are both conical surfaces, and the tops of the third inclined surface 1214 and the fourth inclined surface 1215 are transitionally connected through the plane 1213; the semipermeable membrane 2 is fixedly connected to the plane 1213 by hot melting, the part of the semipermeable membrane 2 located at the inner edge of the plane 1213 is fixedly connected to the third inclined surface 1214, and the part of the semipermeable membrane 2 located at the outer edge of the plane 1213 is fixedly connected to the fourth inclined surface 1215. It can be known that the third inclined surface 1214 and the fourth inclined surface 1215 are transitioned through the plane 1213, thereby preventing the semipermeable membrane 2 from being cut by sharp corners when being welded to the annular protrusion 12, and improving the yield rate during processing and production.

[0057] Of course, in some other embodiments of the present application, the third inclined surface 1214 and the fourth inclined surface 1215 may also be transitionally connected by an arc surface.

[0058] Embodiment 4:

[0059] Reference Figure 8 The difference between this embodiment and the first embodiment is that the pleated surface 121 of this embodiment is different. In this embodiment, the pleated surface 121 is a wavy surface, and the edge of the semipermeable membrane 2 is fitted and connected to the wavy surface.

[0060] It can be known that the wavy surface can increase the contact area between the semipermeable membrane 2 and the annular protrusion 12, thereby improving the stability of the semipermeable membrane 2 being welded and fixed on the annular protrusion 12. Secondly, the wavy surface has a smooth transition when in contact with the semipermeable membrane 2, which is beneficial to improving the semipermeable membrane 2 from being easily scratched by the annular boss 13 when it is welded and fixed by hot melting, and is beneficial to improving the yield rate of the semipermeable membrane 2 welded on the annular protrusion 12.

[0061] Embodiment 5:

[0062] Reference Fig. 9 This embodiment discloses an electric pump, which includes the electric pump waterproof cover plate in Example 1.

[0063] The waterproof cover is installed on the pump housing 4 of the electric pump. The waterproof cover plays a role of waterproofing and ventilation, which is beneficial to improving the service life of the electric pump.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A waterproof cover plate for an electric pump, characterized in that: The invention comprises a cover plate body (1) and a semipermeable membrane (2), wherein the cover plate body (1) is provided with an air hole (11), an annular protrusion (12) is provided on the inner side of the cover plate body (1), the annular protrusion (12) is arranged around the air hole (11), and a side of the annular protrusion (12) away from the cover plate body (1) is provided as a folded surface (121), and the semipermeable membrane (2) is fixedly connected to the folded surface (121).

2. The waterproof cover plate for an electric pump according to claim 1, characterized in that: The semipermeable membrane (2) is fixedly connected to the folded surface (121) of the annular protrusion (12) by means of hot-melt welding.

3. The waterproof cover plate for an electric pump according to claim 1, characterized in that: The pleated surface (121) comprises a first inclined surface (1211) and a second inclined surface (1212); the first inclined surface (1211) and the second inclined surface (1212) are arranged at an angle to each other; the tops of the first inclined surface (1211) and the second inclined surface (1212) intersect; and the semipermeable membrane (2) is fixedly connected to the first inclined surface (1211) and the second inclined surface (1212) in sequence.

4. The waterproof cover plate for an electric pump according to claim 1, characterized in that: The pleated surface (121) comprises a plane (1213), a third inclined surface (1214) and a fourth inclined surface (1215); one side of the plane (1213) is connected to the third inclined surface (1214), and the other side of the plane (1213) is connected to the fourth inclined surface (1215); the semipermeable membrane (2) is fixedly connected to the third inclined surface (1214), the plane (1213) and the fourth inclined surface (1215) in sequence.

5. The waterproof cover plate for an electric pump according to claim 1, characterized in that: The pleated surface (121) is a wavy surface, and the edge of the semipermeable membrane (2) is fitted and connected to the wavy surface.

6. A waterproof cover plate for an electric pump according to any one of claims 1 to 5, characterized in that: A boss (13) is arranged at the air hole (11) on the cover plate body (1), and the boss (13) is arranged on a side of the air hole (11) away from the semi-permeable membrane (2). A branch hole (131) is arranged on the boss (13), and a first end of the branch hole (131) is connected to the air hole (11), and a second end of the branch hole (131) extends from a side wall of the boss (13) and is connected to the outside.

7. The waterproof cover plate for an electric pump according to claim 6, characterized in that: It also comprises a filter cover (3), wherein the filter cover (3) is sleeved on the outside of the boss (13).

8. The waterproof cover plate for an electric pump according to claim 7, characterized in that: A block or a slot is provided on the filter cover (3), a slot or a block is provided on the outer wall of the boss (13), and the filter cover (3) is fixedly connected to the outer side of the boss (13) by means of engagement between the block and the slot; Or a first magnetic block (31) is arranged on the filter cover (3), a second magnetic block (14) is arranged on the cover body (1), and the second magnetic block (14) is arranged around the boss (13), the first magnetic block (31) and the second magnetic block (14) are magnetically fixedly connected, and the filter cover (3) is fixedly connected to the outer side of the boss (13) by means of magnetic fixation of the first magnetic block (31) and the second magnetic block (14).

9. The waterproof cover plate for an electric pump according to claim 6, characterized in that: The cover plate body (1) is provided with a sink groove (15), the sink groove (15) is arranged around the outside of the boss (13), and the branch hole (131) is arranged close to the bottom wall of the sink groove (15).

10. An electric pump, characterized in that: It comprises a waterproof cover plate for an electric pump as claimed in any one of claims 1 to 9.

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