Rear bumper and charging port cover assembly matching structure and method

Abstract

The invention discloses a rear bumper and charging port cover assembly matching structure and method, and relates to the technical field of automobile parts, the rear bumper and charging port cover assembly matching structure comprises a charging port box and a rear bumper, the edge of the charging port box is provided with a sealing strip, and the tail end of the sealing strip is provided with a flexible matching part; a first flanging is arranged on the inner side of the rear bumper, a sinking groove is formed in the first flanging, and the flexible matching part is in interference fit with the side wall of the sinking groove. The sealing strip is in interference fit with the flange of the rear bumper, the problems that the sealing strip and the flange of the rear bumper at the position of the charging port are turned, warped and uneven in gap when being matched can be solved, and the attractiveness is improved while the dustproof and waterproof performance is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile parts, and in particular to a rear bumper and charging port cover assembly matching structure and method. Background Art

[0002] At present, most new energy vehicle models on the market use hidden charging port covers, whose automatic opening and closing function greatly improves the user experience and takes into account dustproof, waterproof and anti-theft performance. When the hidden charging port cover of new energy vehicles is open, due to its complex matching relationship with surrounding parts, it will cause defects such as poor matching between the charging port and surrounding parts and poor appearance. In particular, the charging port cover is arranged across the rear panel of the vehicle body and the rear bumper body, which is difficult to match. Specifically, the sealing strip of the charging port cover does not fit tightly with the surrounding parts, the matching gap is difficult to control evenly, and the sealing strip is wrinkled, affecting the appearance and sealing performance. As the competition in the new energy vehicle market becomes more and more fierce, the traditional charging port cover and bumper matching structure can no longer meet consumers' demand for the beauty and refinement of new energy vehicles. Summary of the invention

[0003] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a rear bumper and charging port cover assembly matching structure and method. The sealing strip and the rear bumper flange have an interference fit, which can solve the problems of curling, warping, and uneven gap between the sealing strip and the bumper flange at the charging port position, thereby improving the dustproof and waterproof performance while improving the aesthetics.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0005] In the first aspect, an embodiment of the present invention provides a rear bumper and charging port cover assembly matching structure, including a charging port box and a rear bumper, wherein a sealing strip is provided at the edge of the charging port box, and a flexible matching portion is provided at the end of the sealing strip; a first flange is provided on the inner side of the rear bumper, and a recessed groove is provided on the first flange, and the flexible matching portion is interference fit with the side wall of the recessed groove.

[0006] As a further implementation manner, the flexible fitting portion is bent inward at a set angle.

[0007] As a further implementation, the first flange width is 5 to 7 mm;

[0008] The depth of the sinking groove is between 2.5 and 3 mm.

[0009] As a further implementation, the sink is connected to the second flange of the rear bumper, and the second flange forms a clamping structure with the mounting bracket.

[0010] As a further implementation, an overhanging portion is provided at the mating position between the flexible mating portion and the end of the first flange.

[0011] As a further implementation manner, the end of the first flanging is connected to the third flanging, and the protruding part is in contact with the first flanging and the third flanging at the same time.

[0012] As a further implementation manner, a clamping structure is formed between the third flanging and the mounting bracket;

[0013] The third flanging also cooperates with a pressing piece, and the pressing piece is used for limiting the third flanging in the Z direction.

[0014] As a further implementation manner, it further includes an outer panel of the charging port cover, and the overall rear part of the side wall is used as the outer panel of the charging port cover.

[0015] In a second aspect, an embodiment of the present invention further provides an installation method for a cooperation structure between a rear bumper and a charging port cover assembly, including:

[0016] Fix the charging port box to the side wall outer panel assembly, and then fix the mounting bracket to the side wall outer panel assembly; connect the rear bumper to the mounting bracket in a clamping manner, and the flexible fitting part at the edge of the charging port box enters the sinking groove of the first flanging and is close to the side wall of the sinking groove.

[0017] As a further implementation manner, the side wall outer panel assembly has a plurality of charging port box mounting points, and the side wall outer panel assembly has a plurality of bracket mounting points.

[0018] The beneficial effects of the present invention are as follows:

[0019] (1) For the rear bumper of the present invention, the flanging corresponding to the cooperation area of the charging port cover is widened and provided with a sinking groove. After the rear bumper is clamped in place with the rear bumper mounting bracket, the sealing strip is closely attached to the flanging of the rear bumper, which can solve the problems of curling, warping, and uneven gaps in the cooperation between the soft rubber at the charging port position and the bumper flanging. While improving the dust and water prevention performance, the aesthetics are greatly improved.

[0020] (2) The width of the first flanging of the rear bumper of the present invention is set to 5-7 mm, the depth of the sinking groove is between 2.5-3 mm, and the flexible fitting part has a certain bending angle. When assembled, the end of the sealing strip can naturally fall into the inner side wall of the bumper sinking groove. The interference fit between the sealing strip and the side wall of the bumper sinking groove avoids the possibility of generating gaps; the depth of the sinking groove ensures that the sealing strip will not turn out of the sinking groove. While the overall fit is flat, it completely blocks the gap between the charging port box and the rear bumper, playing a good sealing role and preventing dust and water from falling into the charging port box.

[0021] (3) In the present invention, the entire rear part of the side panel is used as the outer panel of the charging port cover, which is matched with the outer panel of the side panel and the rear bumper around the perimeter. When not opened, the outer panel of the charging port cover is perfectly integrated with the surrounding environmental components, without leaking the sealing strip of the charging port box or the mold parting line, thus optimizing the customer perception. After opening, an innovative design has been made for the cross-section of the sealing strip of the charging port box and the rear bumper, and it fits neatly and without gaps with the flanging of the bumper, which can simultaneously meet the requirements of sealing, beautification, dust prevention, and aerodynamics. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The schematic diagrams of the drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0023] Figure 1 is a schematic diagram of the cooperation structure of the rear bumper and the charging port cover assembly according to one or more embodiments of the present invention;

[0024] Figure 2 is Figure 1 the sectional view taken along A-A of

[0025] Figure 3 is an effect diagram of the cooperation between the charging port cover and the rear bumper in the opened state according to one or more embodiments of the present invention;

[0026] Figure 4 is a schematic diagram of the snap connection between the rear bumper and the mounting bracket according to one or more embodiments of the present invention;

[0027] Figure 5 is a schematic diagram of the cooperation between the sealing strip and the flanging of the rear bumper according to one or more embodiments of the present invention;

[0028] Figure 6 is a schematic diagram of the installation of the charging port cover assembly and the outer panel of the side panel according to one or more embodiments of the present invention;

[0029] Figure 7 is a schematic diagram of the installation of the mounting bracket and the outer panel of the side panel according to one or more embodiments of the present invention.

[0030] Wherein, 1. Outer panel of the charging port cover, 2. Charging port box, 3. Sealing strip, 4. First flanging, 5. Snap connection structure, 6. Third flanging, 7. Pressing piece, 8. Outer extension part, 9. Sunk groove, 10. Second flanging, 11. Snap connection part, 12. Flexible cooperation part, 13. Card slot, 14. Outer panel assembly of the side panel, 141. First installation point of the charging port box, 142. Second installation point of the charging port box, 143. Third installation point of the charging port box, 144. First installation point of the bracket, 145. Second installation point of the bracket, 146. Third installation point of the bracket, 147. Fourth installation point of the bracket, 148. Fifth installation point of the bracket, 149. Sixth installation point of the bracket. Detailed implementation manners

[0031] It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present invention belongs.

[0032] For the convenience of description, if the words "upper", "lower", "left", and "right" appear in the present invention, they only represent the same directions as the upper, lower, left, and right directions of the accompanying drawings themselves, and do not limit the structure. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention.

[0033] In the description of the present invention, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0034] Embodiment 1:

[0035] The existing bumper flanging is relatively short, usually 1.5 mm. When the charging port sealing strip directly falls on the bumper flanging, wrinkles will be generated, resulting in uneven fitting gaps between the sealing strip and the bumper flanging, leakage of the bumper mold parting line, interference and curling of the charging port sealing strip, and poor appearance. Based on this, this embodiment provides a matching structure between the rear bumper and the charging port cover assembly. Among them, the charging port cover assembly includes a charging port box 2, an outer panel 1 of the charging port cover, and a sealing strip 3. By widening the rear bumper and setting a sunk groove 9, the sealing strip 3 on the outer edge of the charging port box 2 is in close contact with the inner wall of the sunk groove 9.

[0036] In order to distinguish the flangings at different positions of the rear bumper to cooperate with the first flanging of the charging port cover assembly as the first flanging 4, the second flanging 10 is connected to the first flanging 4 through the sunk groove 9; the third flanging 6 of the flanging where the rear bumper cooperates with the vehicle body, and the third flanging 6 is connected to the first flanging 4 at the right end point of the charging port cover assembly, that is, the third flanging 6 is a flanging structure outside the charging port cover matching area.

[0037] Such as Figures 1-3As shown, the width of the first flanging 4 of the rear bumper is extended to 5 - 7 mm. By widening the first flanging 4 for snap - fit cooperation with the mounting bracket, a tight fit is formed between the sealing strip 3 and the rear bumper. A sunk groove 9 is provided inside the first flanging 4, and the sunk groove 9 is provided throughout the mating area of the charging port cover. The depth of the sunk groove 9 is between 2.5 - 3 mm. This depth of the sunk groove 9 can ensure that the sealing strip 3 will not turn out of the sunk groove 9 after fitting with the inner wall of the sunk groove 9, and while the overall fit is flat, it can completely block the gap between the charging port box 2 and the rear bumper, playing a good sealing role to prevent dust and water from falling into the charging port box 2. In the case of the width of the first flanging 4 and the depth of the sunk groove 9 as above, it can ensure a tight fit between the sealing strip 3 and the side wall of the sunk groove 9.

[0038] In this embodiment, the width of the first flanging 4 is set to 7 mm, and the depth of the sunk groove 9 is set to 2.7 mm. Of course, in other embodiments, the width of the first flanging 4 and the depth of the sunk groove 9 can be adjusted adaptively according to different vehicle models.

[0039] Meanwhile, in order to avoid the visible bumper parting line at the mating gap of the charging port cover, the mold parting line is set at the end of the first flanging 4. The flanging part of the mold uses a composite angled lifter. An inner angled lifter is designed inside the large angled lifter area, and a slider is designed on the outside. It is ejected by relying on the outside slider + T - shaped guide rail, and the movement track is disengaged by relying on the back guide rail.

[0040] As Figure 2 and Figure 5 shown, the sealing strip 3 is arranged at the edge of the charging port box 2. Among them, the charging port box 2 is made of hard rubber, and the sealing strip 3 is made of soft rubber. A certain length of soft rubber is extended from the end of the hard rubber by using a two - shot injection molding process. And, the mating surface of the sealing strip 3 and the charging port box 2 is a stepped table structure, enabling the two to be tightly connected and ensuring that the sealing strip 3 is not easily detached from the end of the charging port box 2.

[0041] The sealing strip 3 and the sunk groove 9 adopt an interference design, and the interference amount between them is 0.5 mm, so that the sealing strip 3 can be tightly attached to the side wall of the sunk groove 9. In order to ensure that after the first flanging 4 is snap - fitted with the mounting bracket of the rear bumper, the end of the sealing strip 3 naturally falls on the side wall of the sunk groove 9 and is tightly attached, the side wall of the sunk groove 9 is inclined at a certain angle towards the charging port box 2 side. At the same time, the end of the sealing strip 3 is bent inward, that is, the flexible fitting part 12. As Figure 5 shown, the flexible fitting part 12 with a certain bending angle is tightly attached to the side wall of the sunk groove 9.

[0042] After the rear bumper is assembled to the mounting bracket, the flexible fitting part 12 at the end of the sealing strip 3 just falls into the sunk groove 9, and its 0.5 - mm interference amount makes the flexible fitting part 12 tightly attached to the side wall of the bumper sunk groove 9. As Figure 3As shown, the sealing strip 3 leaks out a certain length at the right end point of the charging port cover assembly, that is, the protruding part 8. The protruding part 8 is clamped at the junction of the first flanging 4 and the third flanging 6, which is beautiful and practical while having a compact structure.

[0043] In this embodiment, the sealing strip 3 is made of EPDM rubber material; the bending angle of the flexible fitting part 12 is 38°; it can be understood that this bending angle can be adjusted adaptively according to actual requirements.

[0044] During installation, first install the charging port box 2, and then snap the rear bumper flanging (the second flanging 10 and the third flanging 6) with the mounting bracket of the rear bumper. As Figure 2 and Figure 4 shown, the second flanging 10 and the mounting bracket form a snap - fit structure 5. Specifically, a plurality of card slots 13 are distributed at intervals in the length direction of the second flanging 10. The mounting bracket is provided with a snap - fit part 11 corresponding to each card slot 13 one by one. The mating end of the snap - fit part 11 and the card slot 13 is a protrusion with a triangular or trapezoidal cross - section. The inclined surface at the end plays a guiding role during its engagement with the card slot 13. After snapping, the other side opposite to the inclined surface contacts the inner wall of the card slot 13 to form good limiting. The rear bumper and the mounting bracket are convenient to assemble through the snap - fit structure 5 and can ensure the connection stability between the two.

[0045] The mounting bracket is also provided with pressing pieces 7. A plurality of pressing pieces 7 are distributed at intervals. The pressing piece 7 is of an L - shaped structure, which restricts the second flanging 10 between it and the snap - fit part 11, plays a Z - direction limiting role for the rear bumper, prevents the installation deviation of the rear bumper flanging, and makes the sealing strip 3 fit evenly with the rear bumper flanging, with neat and gapless fitting. As Figure 3 shown, for the rear bumper flanging (the third flanging 6) outside the charging port cover fitting area, it also has the same matching method of the snap - fit structure 5 + pressing piece 7. The rear bumper of this embodiment adopts a cantilever beam snap - fit structure 5, and its designed snap - fit amount is 2.1 mm, which is firmly snapped while ensuring convenient installation, and further improves the accuracy of the rear bumper installation position.

[0046] In this embodiment, the mounting bracket is injection - molded with POM material. POM has mechanical properties close to those of metals, with a tensile strength of up to 70 MPa, excellent bending strength, and can withstand large external forces without deformation; and the molding shrinkage rate is relatively controllable, with high dimensional accuracy, which is convenient to control the accuracy of the rear bumper installation position.

[0047] In this embodiment, the whole rear part of the side wall is used as the outer panel 1 of the charging port cover. Its perimeter matches the side wall outer panel and the rear bumper. When not opened, the outer panel 1 of the charging port cover is perfectly integrated with the surrounding environmental parts, without leaking the charging port box 2, the sealing strip 3, or the mold parting line; when opened, the sealing strip 3 and the rear bumper adopt a new matching structure, with neat and gapless fitting with the bumper flanging, which can simultaneously meet the requirements of sealing, beautification, dust prevention, and aerodynamics.

[0048] In this embodiment, according to the structural characteristics of the rear bumper, the width of the flanging of the rear bumper in the fitting area of the charging port cover assembly is widened, and the sunken groove 9 structure is set at the same time to hide the mold parting line that is likely to leak outside to the invisible edge of the sunken groove 9. When assembling, the end of the sealing strip 3 can naturally fall into the inner side wall of the sunken groove 9, and the flexible fitting part 12 is interference-fitted with the side wall of the sunken groove 9 to avoid the possibility of generating gaps. After the rear bumper is clamped in place with the mounting bracket, the sealing strip 3 is closely attached to the flanging of the rear bumper, which can solve the problems of curling, warping, and uneven gaps in the fitting of the sealing strip 3 at the charging port position and the flanging of the bumper. While improving the dust and water resistance performance, the aesthetic degree is greatly improved.

[0049] Embodiment 2:

[0050] This embodiment provides an installation method for the fitting structure of the rear bumper and the charging port cover assembly. Based on the fitting structure described in Embodiment 1, the specific installation process includes:

[0051] First, install the charging port box 2 to the outer panel assembly 14 of the side wall, then assemble the mounting bracket of the rear bumper to the outer panel assembly 14 of the side wall, and install the flanging of the rear bumper (the second flanging 10 and the third flanging 6) in the Y direction to the mounting bracket. At this time, the outer panel 1 of the charging port cover does not need to be opened. After the flanging of the rear bumper is clamped with the mounting bracket, the sealing strip 3 of the charging port box 2 naturally falls into the sunken groove 9 of the first flanging 4, and the flexible fitting part 12 of the sealing strip 3 is closely attached to the side wall of the sunken groove 9. The interference fit of 0.5 mm makes the sealing strip 3 form an effect that the end bends inward by 38°.

[0052] Among them, the outer panel assembly 14 of the side wall is provided with multiple installation points for the charging port cover assembly, and at the same time, multiple installation points for the mounting bracket are provided; the number of the above installation points can be adjusted according to actual installation requirements. For the convenience of description, the installation point for installing the charging port cover assembly is the installation point of the charging port box 2, and the installation point for the mounting bracket is the bracket installation point.

[0053] As Figure 6 shown, the outer panel assembly 14 of the side wall is provided with three installation points at intervals corresponding to the lower side of the charging port cover fitting area, that is, from left to right are the first charging port box 2 installation point 141, the second charging port box 2 installation point 142, and the third charging port box 2 installation point 143. The distance between adjacent charging port box 2 installation points is 152 mm. The charging port cover assembly is connected to the corresponding charging port box 2 installation point through bolts to ensure the accurate installation position of the charging port cover assembly.

[0054] As Figure 7As shown in the figure, a first bracket mounting point 144, a second bracket mounting point 145, a third bracket mounting point 146, a fourth bracket mounting point 147, a fifth bracket mounting point 148 and a sixth bracket mounting point 149 are sequentially arranged from left to right on the lower side of the charging port cover mating area. The mounting bracket is connected to the corresponding bracket mounting point by bolts to ensure that the mounting bracket of the rear bumper is properly installed.

[0055] In this embodiment, the charging port box 2 is first installed, and then the flanging of the rear bumper is snap-connected to the mounting bracket. At the same time, the flexible mating portion 12 at the end of the sealing strip 3 naturally falls into the side wall of the sunk groove 9, so that the flanging of the rear bumper is in interference fit with the flexible mating portion 12 of the sealing strip 3 to form a sealed connection.

[0056] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A rear bumper and charging port cover assembly matching structure, characterized in that: It includes a charging port box and a rear bumper. The edge of the charging port box is provided with a sealing strip, and the end of the sealing strip has a flexible matching portion. The inner side of the rear bumper has a first flange, and the first flange is provided with a recessed groove. The flexible matching portion is interference fit with the side wall of the recessed groove.

2. The rear bumper and charging port cover assembly matching structure according to claim 1, characterized in that: The flexible fitting portion is bent inwardly at a set angle.

3. A rear bumper and charging port cover assembly matching structure according to claim 1 or 2, characterized in that: The first flange width is 5 to 7 mm; The depth of the sinking groove is between 2.5 and 3 mm.

4. The rear bumper and charging port cover assembly matching structure according to claim 1, characterized in that: The sink is connected to the second flange of the rear bumper, and the second flange forms a clamping structure with the mounting bracket.

5. The rear bumper and charging port cover assembly matching structure according to claim 1, characterized in that: An overhanging portion is provided at the matching position between the flexible matching portion and the end of the first flange.

6. The rear bumper and charging port cover assembly matching structure according to claim 5, characterized in that: The end of the first flange is connected to the third flange, and the extending portion is in contact with the first flange and the third flange at the same time.

7. A rear bumper and charging port cover assembly matching structure according to claim 5 or 6, characterized in that: The third flange and the mounting bracket form a clamping structure; The third flange is also matched with a pressing sheet, and the pressing sheet is used to limit the third flange in the Z direction.

8. The rear bumper and charging port cover assembly matching structure according to claim 1, characterized in that: It also includes a charging port cover outer panel, with the entire rear portion of the side enclosure serving as the charging port cover outer panel.

9. A method for installing a rear bumper and charging port cover assembly matching structure according to any one of claims 1 to 8, characterized in that: include: Fix the charging port box to the side panel assembly, and then fix the mounting bracket to the side panel assembly; The rear bumper is clamped onto the mounting bracket, and the flexible matching portion of the edge of the charging port box enters into the recessed groove of the first flange and is close to the side wall of the recessed groove.

10. The method for installing the rear bumper and charging port cover assembly matching structure according to claim 9, characterized in that: The side outer panel assembly has multiple charging port box installation points, and the side outer panel assembly has multiple bracket installation points.

Images