Waterproof cover plate of electric pump and electric pump

Abstract

The utility model 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 bulge, the annular bulge is arranged around the air hole, one side of the annular bulge far away from the cover plate body is provided with a wrinkled surface, and the semi-permeable membrane is provided with a semi-permeable membrane. 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 utility model relates to the technical field of automobile parts, and specifically relates to an electric pump waterproof cover plate and electric pump. BACKGROUND

[0002] Electronic water pumps are widely used in new energy vehicles, and with the rapid development of new energy electric vehicles, the performance requirements of parts of the electric vehicles are also getting higher and higher. At present, as an important part of the cooling system, the electronic water pump has an important influence on the performance of the vehicle and is a key and indispensable part to ensure the safety performance of the vehicle. Most of the current electric actuators are driven by motors, and the motors are controlled by vehicle-mounted ECUs (Electronic Control Units) and execute various instructions. 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 environmental humidity is too large or the environmental cleanliness does not meet the standard, water molecules in the air or impurities in the air are likely to adhere to the printed circuit board, which may cause short circuit of the circuit on the printed circuit board and damage the printed circuit board, seriously affecting the use stability and service life of the ECU.

[0003] The existing device generally sets an air hole on the cover plate and sets a semi-permeable membrane (the semi-permeable membrane has the effect of allowing air molecules to pass through but preventing water molecules from passing through) at the air hole. The semi-permeable membrane is used to close the air hole, thereby ensuring that the electronic water pump is always in a low-humidity state. The existing semi-permeable membrane is generally flatly attached to the air hole to close the air hole. However, this may cause the semi-permeable membrane to bulge inward or outward when the air in the electronic water pump expands or contracts due to heat, and as the expansion and contraction continue, the connection between the semi-permeable membrane and the cover plate at the air hole is likely to loosen, resulting in a gap between the semi-permeable membrane and the cover plate. This may cause the gas in the electronic water pump to communicate with the outside through the gap, and at this time, water vapor from the outside is likely to enter the electronic water pump through the gap, causing the semi-permeable membrane to fail.

[0004] In view of the above, there is an urgent need for an electric pump waterproof cover plate and electric pump to solve or at least partially solve the problems existing in the prior art. INVENTION CONTENTS

[0005] The utility model aims at providing an electric pump waterproof cover plate, and aims at solving the problem that the connection between the existing semi-permeable membrane and the cover plate is likely to produce a gap, causing water vapor to enter the electronic water pump. The specific technical scheme is as follows:

[0006] An 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. The side of the annular protrusion away from the cover plate body is provided with a corrugated surface. The semi-permeable membrane is fixedly connected to the corrugated surface.

[0007] Further, the semi-permeable membrane is fixedly connected to the folded surface of the annular protrusion by means of hot melting welding.

[0008] Preferably, the folded surface comprises a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface are arranged at an included angle, the top of the first inclined surface and the top of the second inclined surface intersect, and the semi-permeable membrane is fixedly connected to the first inclined surface and the second inclined surface in sequence.

[0009] Preferably, the folded surface comprises a flat surface, a third inclined surface and a fourth inclined surface, one side of the flat surface is connected to the third inclined surface, the other side of the flat surface is connected to the fourth inclined surface, and the semi-permeable membrane is fixedly connected to the third inclined surface, the flat surface and the fourth inclined surface in sequence.

[0010] Preferably, the folded surface is a wavy surface, and the edge of the semi-permeable membrane is connected to the wavy surface in a fit manner.

[0011] Further, a boss is arranged at the air permeable hole of the cover plate body, the boss is arranged at a side of the air permeable hole away from the semi-permeable membrane, a branch hole is arranged on the boss, a first end of the branch hole is in communication with the air permeable hole, and a second end of the branch hole extends from the side wall of the boss and is in communication with the outside.

[0012] Further, a filter cover is further included, and the filter cover is sleeved outside the boss.

[0013] Further, a clamping block or a clamping groove is arranged on the filter cover, a clamping groove or a clamping block is arranged on the outer wall of the boss, the filter cover is fixedly connected outside the boss in a clamping manner of the clamping block and the clamping groove, or a first magnetic block is arranged on the filter cover, a second magnetic block is arranged on the cover plate body and surrounds the boss, the first magnetic block and the second magnetic block are fixedly connected in a magnetic attraction manner, and the filter cover is fixedly connected outside the boss in a magnetic attraction fixing manner of the first magnetic block and the second magnetic block.

[0014] Further, a sink is arranged on the cover plate body, the sink is arranged outside the boss in a surrounding manner, and the branch hole is arranged close to the bottom wall of the sink.

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

[0016] By arranging the corrugated surface on the side of the annular protrusion away from the cover plate body, on the one hand, the contact area of the semi-permeable membrane with the corrugated surface is improved by arranging the corrugated surface, and on the other hand, the bonding strength of the corrugated surface and the semi-permeable membrane is higher, and the semi-permeable membrane is not prone to crack along the corrugated surface. It is worth noting that under normal circumstances, the semi-permeable membrane is in a tension state, when a slight crack occurs between the semi-permeable membrane and the corrugated surface, because the corrugated surface is a concave-convex surface or is composed of multiple surfaces, the semi-permeable membrane at the crack changes from an uneven state to a state tending to be flat, and when the semi-permeable membrane changes from uneven to a state tending to be flat, the excess semi-permeable membrane will move towards the direction of the semi-permeable membrane in the middle which is tensioned, so that the tensioned semi-permeable membrane becomes relaxed, and the semi-permeable membrane in the relaxed state has poor force transmission effect and is not prone to transmit tension to the connection between the semi-permeable membrane and the cover plate body, thereby hindering the further development of the crack and preventing the semi-permeable membrane and the cover plate body from generating a through gap, thereby improving the service life of the waterproof cover plate of the electric pump.

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

[0018] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. Below, the utility model will be described in detail. Figures 1-9 The utility model will be described further in detail. ACCOUT OF DRAWINGS

[0019] The drawings that form a part of the present application are used to provide a further understanding of the utility model, and the illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute undue limitations on the utility model. In the drawings:

[0020] Figure 1 It is the internal structure schematic view of a kind of electric pump waterproof cover plate of the embodiment 1 of the present application;

[0021] Figure 2 It is the enlarged view of the inside of a kind of electric pump waterproof cover plate of the embodiment 1 of the present application;

[0022] Figure 3 It is Figure 2 The enlarged view of A in;

[0023] Figure 4 It is one of the overall structure schematic view of a kind of electric pump waterproof cover plate of the embodiment 1 of the present application;

[0024] Figure 5 It is the second overall structure schematic view of a kind of electric pump waterproof cover plate of the embodiment 1 of the present application;

[0025] Figure 6 It is the partial enlarged view of the inside of a kind of electric pump waterproof cover plate of the embodiment 2 of the present application;

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

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

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

[0029] Wherein, 1, cover plate body; 11, air hole; 12, annular protrusion; 121, corrugated surface; 1211, first inclined surface; 1212, second inclined surface; 1213, flat surface; 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 shell. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present application, the present application will be described more fully below, and preferred embodiments of the present application are given. However, the present application can be realized 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 disclosure of the present application more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the specification of the present application herein is only for the purpose of describing specific embodiments and is not intended to limit the present application.

[0032] Embodiment 1:

[0033] Referring to Figures 1-5 The present embodiment provides a waterproof cover plate of an electric pump, comprising a cover plate body 1 and a semi-permeable membrane 2, the cover plate body 1 is provided with an air hole 11, the inner side of the cover plate body 1 is provided with an annular protrusion 12, the annular protrusion 12 is arranged around the air hole 11, the side of the annular protrusion 12 away from the cover plate body 1 is provided with a corrugated surface 121, and the semi-permeable membrane 2 is fixedly connected to the corrugated surface 121.

[0034] It can be known that the waterproof and breathable function of the waterproof cover plate of the electric pump is realized by the setting of the semi-permeable membrane 2. In addition, by setting the corrugated surface 121 on the side of the annular protrusion 12 away from the cover plate body 1, on the one hand, the contact area of the semi-permeable membrane 2 and the corrugated surface 121 is improved by setting the corrugated surface 121, and on the other hand, the bonding strength of the corrugated surface 121 and the semi-permeable membrane 2 is higher, and it is not easy to crack along the corrugated surface 121. It is worth noting that under normal circumstances, the semi-permeable membrane 2 is in a tension state, when a slight crack occurs between the semi-permeable membrane 2 and the corrugated surface 121, because the corrugated surface 121 is a concave-convex surface or composed of multiple surfaces, the semi-permeable membrane 2 at the crack changes from an uneven state to a state tending to be flat, and when the semi-permeable membrane 2 changes from uneven to a state tending to be flat, the excess semi-permeable membrane 2 will move towards the direction of the semi-permeable membrane 2 in the middle, making the semi-permeable membrane 2 in tension become relaxed, and the semi-permeable membrane 2 in the relaxed state has poor force transmission effect and is not easy to transmit tension to the connection between the semi-permeable membrane 2 and the cover plate body 1, thereby hindering the further development of the crack, preventing the generation of through gaps between the semi-permeable membrane 2 and the cover plate body 1, and improving the service life of the waterproof cover plate of the electric pump.

[0035] Further, the semi-permeable membrane 2 is fixedly connected to the corrugated surface 121 of the annular protrusion 12 by hot melt welding.

[0036] It can be known that the semi-permeable membrane 2 is fixedly connected to the annular protrusion 12 by hot melt welding, so that the semi-permeable membrane 2 is more reliable than the glue bonding method and is not easy to crack.

[0037] Preferably, the corrugated 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 included angle, the top of the first inclined surface 1211 and the second inclined surface 1212 intersects, and the semi-permeable membrane 2 is fixedly connected to the first inclined surface 1211 and the second inclined surface 1212 in sequence.

[0038] Specifically, in the 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 circular. 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 semi-permeable membrane 2 located inside the intersection line is attached to the first inclined surface 1211, and the portion of the semi-permeable membrane 2 located outside the intersection line is attached to the second inclined surface 1212, thereby increasing the contact area between the semi-permeable membrane 2 and the boss 13 and improving the stability of the connection between the semi-permeable membrane 2 and the boss 13. In addition, it is worth noting that when the portion of the semi-permeable membrane 2 inside the intersection line is loosened due to the thermal expansion and contraction of the air acting on the semi-permeable membrane 2, the semi-permeable membrane 2 in the middle becomes loose, and after becoming loose, the force transmitted by the semi-permeable membrane 2 to the portion located outside the intersection line is weakened, thereby making it difficult for a crack to occur between the portion of the semi-permeable membrane 2 located outside the intersection line and the annular protrusion 12, thereby facilitating the improvement of the connection stability between the semi-permeable membrane 2 and the annular protrusion 12 and reducing the failure caused by the through crack between the semi-permeable membrane 2 and the annular protrusion 12.

[0039] It should be noted that in the present application, the surface of the semi-permeable membrane 2 located in the middle of the air permeable hole 11 is a flat surface 1213. In some other embodiments of the present application, the surface of the semi-permeable membrane 2 located in the middle of the air permeable hole 11 is a corrugated surface. Through the arrangement of the corrugated surface, the air permeable area of the semi-permeable membrane 2 is increased, and the air permeation is more smooth.

[0040] Further, the boss 13 is arranged on the cover plate body 1 at the air permeable hole 11, the boss 13 is arranged on the side of the air permeable hole 11 away from the semi-permeable membrane 2, the boss 13 is provided with a branch hole 131, the first end of the branch hole 131 is in communication with the air permeable hole 11, and the second end of the branch hole 131 extends from the side wall of the boss 13 and is in communication with the outside.

[0041] Specifically, the branch hole 131 is arranged in multiple, and the multiple branch holes 131 are arranged circumferentially along the boss 13, and the diameter of the branch hole 131 is smaller than the diameter of the air permeable hole 11.

[0042] It can be known that, if the air permeable hole 11 is not provided with the boss 13, because the diameter of the air permeable hole 11 is large, the water vapor and dust particles in the air are easy to directly pass through the air permeable hole 11 to form convection and move towards the semi-permeable membrane 2, thereby causing the dust particles and fine water droplets in the air to adhere to the semi-permeable membrane 2, blocking the semi-permeable membrane 2 and affecting the air permeability of the semi-permeable membrane 2.

[0043] And through the setting of the boss 13, the convection of the outside air and the air hole 11 is blocked, and through the setting of the branch hole 131 on one side of the boss 13, the aperture of the branch hole 131 is smaller than the diameter of the air hole 11, and the convection flow of the air flow is slowed down through the branch hole 131, and the entry of the outside dust particles into the air hole 11 is reduced.

[0044] Further, the filter cover 3 is further included, and the filter cover 3 is sleeved outside the boss 13.

[0045] It should be noted that the semi-permeable membrane 2 is provided with dense micropores, and air molecules can smoothly pass through the micropores, while water molecules and dust particles in the air cannot pass through the micropores, thereby realizing waterproof and air permeability and dust prevention.

[0046] It can be known that there are a large number of dust particles in the air, and the dust particles cannot pass through the micropores, but are easy to accumulate at the orifice of the micropore, and form a closure to the micropore. As the number of blocked micropores increases, the air permeability of the micropore decreases, and the semi-permeable membrane 2 is easy to fail, which seriously affects the service life of the semi-permeable membrane 2. Through the setting of the filter cover 3 outside the boss 13, the air is preliminarily filtered, and most of the dust particles are blocked outside the filter cover 3, thereby preventing the dust particles in the air from causing blockage to the micropores of the semi-permeable membrane 2, and prolonging the service life of the semi-permeable membrane 2.

[0047] Further, the filter cover 3 is further included, and the filter cover 3 is sleeved outside the boss 13.

[0048] It can be known that the filter cover 3 is fixedly connected to the boss 13 through the cooperation of the clamping block and the clamping groove, and the cooperation of the clamping block and the clamping groove facilitates the replacement of the filter cover 3.

[0049] Further, the cover plate body 1 is provided with a sink 15, and the sink 15 is arranged outside the boss 13 to enable the boss 13 to be 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 through the setting of the sink 15, the convection of the air outside the boss 13 is further reduced, thereby reducing the entry of the dust in the air into the sink 15 and improving the service life of the filter cover 3.

[0051] Embodiment 2:

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

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

[0054] Embodiment 3:

[0055] With reference to Figure 7 The difference between the embodiment and embodiment 1 is that the wrinkle surface 121 in the embodiment is different. In the embodiment, the wrinkle surface 121 includes a flat surface 1213, a third inclined surface 1214, and a fourth inclined surface 1215, one side of the flat surface 1213 is connected to the third inclined surface 1214, and the other side of the flat surface 1213 is connected to the fourth inclined surface 1215, and the semi-permeable membrane 2 is fixedly connected to the third inclined surface 1214, the flat surface 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 top of the third inclined surface 1214 and the fourth inclined surface 1215 is connected in transition through the flat surface 1213; the semi-permeable membrane 2 is fixedly connected to the flat surface 1213 in a heat melting manner, the part of the semi-permeable membrane 2 located at the inner side edge of the flat surface 1213 is fixedly connected to the third inclined surface 1214, and the part of the semi-permeable membrane 2 located at the outer side edge of the flat surface 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 connected in transition through the flat surface 1213, so as to prevent the semi-permeable membrane 2 from being cut by sharp corners when being welded to the annular protrusion 12, and improve the yield rate in the processing and production process.

[0057] Of course, in some other embodiments of the application, the third inclined surface 1214 and the fourth inclined surface 1215 can also be connected in transition through a circular arc surface.

[0058] Embodiment 4:

[0059] With reference to Figure 8 The difference between the embodiment and embodiment 1 is that the wrinkle surface 121 in the embodiment is different. In the embodiment, the wrinkle surface 121 is a wave-shaped surface, and the edge of the semi-permeable membrane 2 is connected to the wave-shaped surface in a fit manner.

[0060] It can be known that the contact area of the semi-permeable membrane 2 and the annular protrusion 12 can be increased through the wave-shaped surface, and the stability of the semi-permeable membrane 2 welded and fixed on the annular protrusion 12 is improved. Secondly, the wave-shaped surface is smoothly transitioned when being in contact with the semi-permeable membrane 2, which is beneficial to improve that the semi-permeable membrane 2 is not easily cut by the annular protrusion 13 when being welded and fixed through the hot melting mode, and is beneficial to improve the yield of the semi-permeable membrane 2 welded on the annular protrusion 12.

[0061] Embodiment 5:

[0062] With reference to Figure 9 The embodiment discloses an electric pump, and the water pump comprises the waterproof cover plate of the electric pump in the embodiment 1.

[0063] The waterproof cover plate is installed on the pump shell 4 of the electric pump, and the waterproof cover plate plays a waterproof and ventilation role, and is beneficial to improve the service life of the electric pump.

[0064] The above only describes the preferred embodiments of the utility model and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement and the like within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. An electric pump waterproof cover plate, characterized by: The cover plate body (1) is provided with a gas permeable hole (11), and the inner side of the cover plate body (1) is provided with an annular protrusion (12) which is arranged around the gas permeable hole (11), and the annular protrusion (12) is provided with a corrugated surface (121) away from one side of the cover plate body (1), and the semi-permeable membrane (2) is fixedly connected to the corrugated surface (121).

2. The waterproof cover plate of an electric pump according to claim 1, wherein: the semi-permeable membrane (2) is fixedly connected to the corrugated surface (121) of the annular protrusion (12) by hot melt welding.

3. The waterproof cover plate of an electric pump according to claim 1, wherein: the corrugated 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 included angle, the top of the first inclined surface (1211) and the second inclined surface (1212) intersects, and the semi-permeable membrane (2) is fixedly connected to the first inclined surface (1211) and the second inclined surface (1212) in sequence.

4. The waterproof cover plate of an electric pump according to claim 1, wherein: the corrugated surface (121) comprises a flat surface (1213), a third inclined surface (1214) and a fourth inclined surface (1215), one side of the flat surface (1213) is connected with the third inclined surface (1214), the other side of the flat surface (1213) is connected with the fourth inclined surface (1215), and the semi-permeable membrane (2) is fixedly connected to the third inclined surface (1214), the flat surface (1213) and the fourth inclined surface (1215) in sequence.

5. The waterproof cover plate of an electric pump according to claim 1, wherein: the corrugated surface (121) is a wave-shaped surface, and the edge of the semi-permeable membrane (2) is connected with the wave-shaped surface.

6. The waterproof cover plate of an electric pump according to any one of claims 1-5, wherein: a boss (13) is arranged at the gas permeable hole (11) of the cover plate body (1), the boss (13) is arranged away from the semi-permeable membrane (2) on the side of the gas permeable hole (11), the boss (13) is provided with a branch hole (131), the first end of the branch hole (131) is communicated with the gas permeable hole (11), and the second end of the branch hole (131) extends from the side wall of the boss (13) and is communicated with the outside.

7. The waterproof cover plate of an electric pump according to claim 6, further comprising a filter cover (3), wherein: the filter cover (3) is sleeved outside the boss (13).

8. The waterproof cover plate of an electric pump according to claim 7, wherein: the filter cover (3) is provided with a clamping block or a clamping groove, the outer wall of the boss (13) is provided with a clamping groove or a clamping block, and the filter cover (3) is fixedly connected to the outer side of the boss (13) by clamping the clamping block and the clamping groove. Or the first magnetic block (31) is arranged on the filter cover (3), the second magnetic block (14) is arranged on the cover plate 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 fixedly connected in a magnetic attraction mode, and the filter cover (3) is fixedly connected outside the boss (13) through the first magnetic block (31) and the second magnetic block (14) in a magnetic attraction mode.

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

10. An electric pump characterized by: The waterproof cover plate of an electric pump according to any one of claims 1-9.

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