CN220726567U

CN220726567U - Cover and electronic water pump

Info

Publication number: CN220726567U
Application number: CN202322408658.3U
Authority: CN
Inventors: 宗杰; 安德烈·鲁尔; 延斯·朗根斯坦; 马可·德廷格; 尤金·马卡罗夫; 本杰明·魏曼; 约翰内斯·迪克曼; 杰弗里·德尔登
Original assignee: Mahle Automotive Technology Suzhou Co ltd
Current assignee: Mahle Automotive Technology Suzhou Co ltd
Priority date: 2023-09-05
Filing date: 2023-09-05
Publication date: 2024-04-05
Anticipated expiration: 2033-09-05

Abstract

The application provides a cover and an electronic water pump, wherein the cover comprises a top plate; a first flange surrounding the top plate and surrounding the outer periphery of the shell; the first flanging is formed with a plurality of openings; the opening includes two fin portions, and the profile of each fin portion includes at least one lower straight edge and at least one upper oblique edge, and lower straight edge and upper oblique edge set up in the direction of height of opening opposite sides, and lower straight edge is kept away from the roof than upper oblique edge, and upper oblique edge is in the direction of being close to lower straight edge when extending in the direction of keeping away from the middle part of opening in the width direction, in the direction of height. The cover according to the application has the advantages of simple structure, low manufacturing cost, simple assembly with the shell and good sealing, and the electronic water pump according to the application has the same advantages.

Description

Cover and electronic water pump

Technical Field

The present application relates to the field of seals and automotive parts, and in particular to a cover for sealing and an electronic water pump comprising the cover.

Background

The electronic water pump of a motor vehicle comprises a sealing cover plate (hereinafter also referred to as cover) which is generally used for the electronic controller compartment to isolate the electrical and corrosive effects of the external environment.

Fig. 1a shows a conventional installation of a cover of an electronic water pump. The cover C 'is fixed to the housing F' by a plurality of screws B which, while being tightened, compress the seal to meet the sealing requirements.

The disadvantage of this mounting is that:

first, the cost is high. The cap C' is typically designed in a thicker structure to meet the connection strength requirements; and a plurality of screws B are required, the cost of the component raw materials is relatively high.

Second, electromagnetic shielding performance is weak. The cover C' is generally made of aluminum or plastic, and has no magnetic permeability, cannot effectively physically isolate electromagnetic interference from the outside, and cannot shield electromagnetic waves inside, so that electromagnetic influence may be generated on the external environment.

Third, the assembly process is complex. The cap C' requires a high centering precision before assembly to ensure the reliability of the radial seal; the installation of the screw B needs to be provided with an additional tool gun for locking, and the assembly process is complex.

As an improvement, as shown in fig. 1b, the riveting edge water pump end cover is preferable, the cover adopts a riveting structure, a window 1 is arranged at the edge of the cover, the lower part 2 of the riveting edge is pressed to deform during assembly, the nose part 3 of the window abuts against the lower part of the edge of the water pump shell, and the end cover is fixed on the water pump shell. The connecting mode has the advantages of high assembly speed and simple structure. However, the riveting window of the improved scheme is small in opening, is not beneficial to sampling of measuring points, and is not easy to rivet due to stress concentration. Because the height of the riveting edge is limited, the size of the riveting window is blindly increased, the connection strength of the edge of the cover can be influenced, and the damage and falling risks are increased.

Disclosure of Invention

The present application aims to overcome or at least alleviate the above-mentioned drawbacks of the prior art, and to provide a cover with a simple structure, low cost and convenient assembly, and an electronic water pump comprising the cover.

According to a first aspect of the present application there is provided a cap comprising: a top plate for being disposed at an open end of the housing; and a first flange surrounding the top plate for surrounding the outer periphery of the housing; the first flanging is formed with a plurality of openings;

the opening comprises two fins, the outline of each fin comprises at least one lower straight edge and at least one upper inclined edge, the lower straight edge and the upper inclined edge are arranged on opposite sides of the opening in the height direction, the lower straight edge is far away from the top plate than the upper inclined edge, and the upper inclined edge extends in the width direction towards the direction away from the middle of the opening and simultaneously extends in the height direction towards the direction close to the lower straight edge.

In at least one embodiment, the cover further comprises at least one tongue located between the two fins and abutting the lower straight edge, the opening partially surrounding the tongue, the tongue being bendable and plastically deformable against the housing.

In at least one embodiment, the lid further comprises a second rim surrounding the top panel, the first rim surrounding the second rim,

the second flange is for abutment against the open end of the housing.

In at least one embodiment, the dimension of the opening in the width direction is 2 to 4 times the dimension of the opening in the height direction.

In at least one embodiment, the dimension of the tongue in the width direction is 1 to 2 times the dimension of the tongue in the height direction.

In at least one embodiment, the profile of each of the fins further includes a lower beveled edge, an upper straight edge, and side edges,

the lower straight edge and the upper straight edge are arranged in parallel with the top plate,

the lower straight edge is farther from the top plate in the height direction than the upper straight edge,

the lower inclined edge is adjacent to the lower straight edge, and extends in a direction away from the upper straight edge in a height direction while extending in a width direction in a direction away from the middle of the opening, the upper inclined edge is adjacent to the upper straight edge, and the side edge connects the upper inclined edge and the lower inclined edge.

In at least one embodiment, the first flange further comprises a lower portion located below the opening away from the top plate, and when assembled, the plurality of rams simultaneously complete the lower portion to be punched.

According to a second aspect of the present application, there is provided an electronic water pump comprising a housing, a cover and a sealing ring, the sealing ring being arranged between the housing and the cover, characterized in that the cover is a cover according to the first aspect of the present application.

In at least one embodiment, the housing includes a housing rim at an open end, the housing rim protruding from the body portion of the housing in a peripheral direction, a portion of the first flange below the opening abutting against a lower portion of the housing rim facing away from the top plate of the cover.

In a third aspect of the present application, there is provided an electronic water pump comprising a housing, a cover and a seal ring, the cover being a cover of the first aspect of the present application,

the shell comprises a shell edge positioned at the opening end, the shell edge protrudes out of the main body part of the shell towards the outer circumferential direction,

the upper surface of the shell rim facing the top plate of the cover is partially recessed to form an annular sealing groove, the sealing ring is arranged in the sealing groove,

the second flanging of the cover abuts against the upper surface of the shell rim and presses the sealing ring,

the portion of the first flange below the opening abuts against a lower portion of the top plate of the housing rim facing away from the cover.

The cover according to the application has the advantages of simple structure, low manufacturing cost, simple assembly with the shell and good sealing, and the electronic water pump according to the application has the same advantages.

In the design structure, by arranging the inclined upper bevel edge in the outline of the opening, the opening window is further larger, the riveting depth is easy to measure, and the riveting quality is ensured; moreover, this oblique arrangement of the upper bevel edge does not remove a great deal of material, thereby ensuring the rigidity of the cover and the strength of the connection.

Drawings

Fig. 1 is a schematic view of a part of the structure of an electronic water pump in the prior art.

Fig. 2 is a schematic view of a partial structure of a cover according to a first embodiment of the present application.

Fig. 3 is an enlarged schematic view of the opening in fig. 2.

Fig. 4 and 5 are partial sectional views of a cover and a housing of an electronic water pump according to a first embodiment of the present application during assembly.

Fig. 6 is a schematic view of an electronic water pump according to a first embodiment of the present application mated with a fixture during assembly.

Fig. 7 is a schematic view of a portion of a lid mated with a tooling according to a first embodiment of the present application.

Fig. 8 is a schematic view of a partial structure of a cover according to a second embodiment of the present application.

Fig. 9 is a partial cross-sectional view of a cover and a housing of an electronic water pump according to a second embodiment of the present application, assembled together.

Fig. 10 is an enlarged schematic view of an opening in a cap according to a second embodiment of the present application.

Reference numerals illustrate:

c, C' cover; a C0 top plate; c1, a first flanging; c2, second flanging;

10 openings; 11 tongue; 12 fins; 121 lower straight edge; 122 lower bevel edge; 123 upper straight edge; 124 upper beveled edge; 125 sides; 13 roots; 21 lower part;

b, a screw; s sealing rings; f, F' housing; f1 casing edges; f10, sealing the groove; t tooling; t1 ram.

Detailed Description

Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are merely illustrative of how one skilled in the art may practice the present application and are not intended to be exhaustive of all of the possible ways of practicing the present application nor to limit the scope of the present application.

First embodiment

Referring to fig. 2 to 7, the cover according to the first embodiment of the present application, the electronic water pump, and the assembly method thereof will be described with reference to an electronic water pump as an application scenario.

Unless otherwise specified, referring to fig. 2 and 3,W, the width direction and the height direction are indicated by H, and "up" or "down" is described in an up-down relationship in the drawings. It should be understood that the above-mentioned upper and lower relationships are opposite, and the upper and lower relationships can be changed correspondingly according to different placing postures of the electronic water pump.

The electronic water pump according to the present application comprises a housing F, a cover C and a sealing ring S. The housing F has an open end, and the cover C is disposed at the open end of the housing F to close the open end.

Referring to fig. 2 to 5, the cover C in the present embodiment includes a top plate C0, a first burring C1, and a second burring C2. The second flanging C2 surrounds the periphery of the top plate C0, and the first flanging C1 surrounds the periphery of the second flanging C2. The inner surface of the second turn-up edge C2 is substantially parallel to the main body of the top plate C0, and the inner surface of the first turn-up edge C1 is substantially perpendicular to the inner surface of the second turn-up edge C2.

The first flange C1 has a plurality of openings 10 formed therein. Alternatively, the openings 10 are uniformly distributed in the circumferential direction of the first flange C1, i.e., in the direction surrounding the open end of the housing F; alternatively, in the case where the cross section of the open end is substantially polygonal, the openings 10 are uniformly distributed on each side of the polygonal structure of the first turn-up C1.

The opening 10 has a substantially butterfly shape, and a tongue 11 is formed in the center of the lower side thereof, or the tongue 11 is surrounded by the opening 10 from above and both sides in the width direction W, or the tongue 11 is surrounded by the opening 10 in three directions, i.e., the upper side, the left side, and the right side.

Specifically, referring to fig. 3, the tongue portion 11 has a substantially rectangular shape, and the opening 10 has two symmetrical fin portions 12 formed on both sides in the width direction W of the tongue portion 11.

The profile of each fin 12 includes a lower straight edge 121, a lower sloping edge 122, an upper straight edge 123, an upper sloping edge 124, and side edges 125. The lower straight edge 121 and the upper straight edge 123 are disposed parallel to the top plate C0, the lower straight edge 121 abuts the tongue 11, and the lower straight edge 121 is further from the top plate C0 than the upper straight edge 123 in the height direction H. The lower sloping side 122 adjoins the lower straight side 121, and the lower sloping side 122 extends in the direction away from the upper straight side 123 in the height direction H while extending in the width direction W in the direction away from the tongue 11; the upper sloping side 124 adjoins the upper straight side 123, and the upper sloping side 124 extends in the direction away from the tongue 11 in the width direction W while extending in the direction closer to the lower straight side 121 in the height direction H. The side edge 125 connects the upper bevel 124 and the lower bevel 122.

The inclined fin 12 makes the root 13 of the lower part of the tongue 11 have a substantially triangular shape, so that the tongue 11 has a good structural strength.

Alternatively, the dimension W11 of the tongue 11 in the width direction W is 1 to 2 times the dimension H11 of the tongue 11 in the height direction H, for example, the dimension W11 is equal to the dimension H11 in the present embodiment; the dimension W10 of the opening 10 in the width direction W is 2 to 4 times the dimension H10 of the opening 10 in the height direction H, for example, the dimension W10 is 3 times the dimension H10 in the present embodiment.

Optionally, the cover C is a steel material. The steel cover C makes it possible to shield external electromagnetic interference and to prevent external radiation of the internal circuit.

The cover C may be press-formed by a press process.

Referring to fig. 4 and 5, the case F includes a case rim F1 at an open end, and the case rim F1 protrudes from a main body portion of the case F in an outer circumferential direction.

The upper surface of the case rim F1 facing the top plate C0 of the cover C is partially recessed to form an annular seal groove F10, and a seal ring S is provided in the seal groove F10.

In the height direction H, the height of the seal ring S in the natural state is not smaller, preferably larger than the depth of the seal groove F10. This makes it possible for the second flange C2 of the cover C, in the case of abutment against the upper surface of the housing rim F1, to simultaneously press the sealing ring S, with a slight deformation of the sealing ring S, so that the sealing ring S exerts a good sealing effect between the housing F and the cover C.

The distance between the upper edge of the tongue 11 and the second flange C2 is smaller than the height of the housing rim F1, and the distance between the lower edge of the tongue 11 and the second flange C2 is slightly larger than the height of the housing rim F1. This allows the tongue 11 to be pressed into and against the lower part of the housing rim F1.

The outline arrows in fig. 4 show the direction of pressing the tongue 11, and fig. 5 shows the case where the tongue 11 abuts against the lower portion of the housing rim F1 after the lower portion 21 is moved following the movement of the lower portion 21 after plastic deformation occurs to move in the housing F direction.

Referring to fig. 5, after the lower portion 21, tongue 11 is compressively deformed, tongue 11 provides, on the one hand, a limit to cover C with respect to housing F and, on the other hand, an upward pressure to housing rim F1. The housing rim F1 (or sealing ring S) is then subjected to opposing pressure by the second flange C2 and the tongue 11, respectively, so that the cap C can provide an effective axial seal for the housing F.

It can also be seen from fig. 5 that the first and second flanges C1, C2 of the press-fitted cap C can completely encase the shell rim F1, which not only physically forms a good fit of the cap and the shell, enhancing the seal, but also enables the steel cap to provide electromagnetic shielding with a larger contact area.

Fig. 6 and 7 show a tool T for pressing the tongue 11. The tooling T includes a plurality of rams T1, each ram T1 being disposed in alignment with one of the lower portions 21. By providing pressure to the ram T1, the lower portion 21 can be punched. Alternatively, the stamping of the plurality of rams T1 is done at once.

Second embodiment

A second embodiment of the present application is described with reference to fig. 8 to 10. The second embodiment is a modification of the first embodiment, the same reference numerals are given to the same or similar components as those in the first embodiment in terms of structure or function, and detailed description of these components is omitted.

The main difference between this embodiment and the first embodiment is that the tongue 11 is not formed at the opening 10, and only the root 13 slightly protruding in the direction in which the opening 10 is located remains. I.e. the lower straight edges of the two fins 12 are connected together.

When the cap C is assembled with the housing F, the ram T1 punches the lower portion 21, and the root 13 follows the deformation of the lower portion 21 into the lower portion of the housing rim F1 and abuts against the housing rim F1, thereby fixing the cap C to the housing F.

Similarly to the first embodiment, the dimension W10 of the opening 10 in the width direction W is 2 to 4 times the dimension H10 of the opening 10 in the height direction H, for example, the dimension W10 in the present embodiment is 3 times the dimension H10.

It should be noted that in other possible embodiments, the root 13 may be omitted, or the lower bevel 122 and the lower straight edge 121 may be integrated into a long lower straight edge 121, and the long lower straight edge 121 connects the two sides 125. In this case, when the cover C is assembled with the housing F, the press head T1 presses the lower portion 21 into the lower portion 21 below the housing rim F1 and abuts against the housing rim F1, thereby fixing the cover C to the housing F.

It will be appreciated that the above-described embodiments and portions of aspects or features thereof may be suitably combined.

The present application has at least one of the following advantages:

(i) The area under the opening of the cover (lower part, root or tongue) can fix the cover to the housing and form a tight contact with the housing, i.e. the area under the opening acts as a replacement for the screws in the prior art and the press-fitted cover can effectively cover the housing. The parts and the cost are saved.

(ii) The assembly of the lower area of the opening and the shell can be formed at one time through a tool, and the assembly mode is simple and reliable.

(iii) The cover may be made of steel, which can shield external electromagnetic interference and prevent external radiation of internal circuits.

(iv) The steel cover can be formed by stamping at one time, and the cost is low.

(v) By arranging the inclined upper bevel edge in the outline of the opening, the opening window is further larger, the riveting depth is easy to measure, and the riveting quality is ensured; moreover, this oblique arrangement of the upper bevel edge does not remove a great deal of material, thereby ensuring the rigidity of the cover and the strength of the connection.

Of course, the present application is not limited to the above-described embodiments, and those skilled in the art, under the teachings of the present application, may make various modifications to the above-described embodiments of the present application without departing from the scope of the present application. For example:

(i) The second flange C2 may be formed integrally with the top plate C0, i.e., the second flange is not formed separately, but the top plate is directly engaged with the rim of the housing.

(ii) The first flange C1 may not be formed in a complete ring shape, but may be circumferentially spaced, only by ensuring that the openings and the tongues are distributed in the circumferential direction of the cap.

Claims

1. A lid, comprising:

a top plate for being disposed at an open end of the housing; and

a first flange surrounding the top plate for surrounding the outer periphery of the housing;

the first flanging is formed with a plurality of openings;

it is characterized in that the method comprises the steps of,

2. The cover of claim 1, further comprising at least one tongue located between the two fins and abutting the lower straight edge, the opening partially surrounding the tongue, the tongue being bendable and plastically deformable against the housing.

3. The lid of claim 1, further comprising a second rim surrounding the top panel, the first rim surrounding the second rim,

the second flange is for abutment against the open end of the housing.

4. The cover of claim 1, wherein the dimension of the opening in the width direction is 2 to 4 times the dimension of the opening in the height direction.

5. The cover of claim 2, wherein the dimension of the tongue in the width direction is 1 to 2 times the dimension of the tongue in the height direction.

6. The cover of claim 1, wherein the profile of each of the fins further comprises a lower beveled edge, an upper straight edge, and side edges,

7. The lid of any one of claims 1 to 6, wherein the first flange further comprises a lower portion located below the opening away from the top panel, the plurality of rams completing the lower portion coincidentally at one time during assembly.

8. An electronic water pump comprising a housing, a cover and a sealing ring, the sealing ring being arranged between the housing and the cover, characterized in that the cover is a cover according to any one of claims 1 to 7.

9. The electronic water pump of claim 8, wherein the housing includes a housing rim at an open end, the housing rim protruding in a peripheral direction from the body portion of the housing, the portion of the first flange below the opening abutting against a lower portion of the housing rim facing away from the top plate of the cover.

10. An electronic water pump comprising a housing, a cover and a sealing ring, characterized in that the cover is a cover according to any one of claims 1 to 7,