An automotive rear door overlap lower trim assembly

Abstract

The present application relates to the field of automobile door lower trim, specifically a kind of automobile rear door lap joint type lower trim assembly, including lower trim structure and wheel arch structure, the wheel arch structure is overlapped on lower trim structure;The lower trim structure includes lower trim body, the lower trim body includes lower trim outer plate, the lower trim inner plate is provided in lower trim outer plate inside;The wheel arch structure includes wheel arch body, and wheel arch inner plate is provided in wheel arch body inside;The wheel arch body is overlapped on lower trim body;The lower trim structure further includes decorative plate bright strip being arranged on lower trim outer plate;The present application discloses a kind of automobile rear door lap joint type lower trim assembly, the structure of traditional lower trim assembly is disclosed, the present application is designed into split structure by lower trim structure and wheel arch structure, facilitate the installation production of lower trim assembly;While it can be well avoided that injection shrink mark is generated at the connecting portion of traditional lower trim body and wheel arch body.

Description

Technical Field

[0001] This invention relates to the field of automotive door lower trim panels, specifically an overlapping lower trim panel assembly for automotive rear doors. Background Technology

[0002] Wheel arch, also known as car wheel arch, refers to the decorative strip along the upper edge of the tire; it is the semi-circular part that protrudes from the fender above the car tire.

[0003] The lower door trim panel is mainly located below the car door. Since it is located at the bottom of the car body, it is close to the road surface during vehicle operation and provides good protection for the car body from the impact of water and gravel on the road.

[0004] The lower door trim is divided into the front door lower trim and the rear door lower trim; the wheel arch is divided into the front wheel arch and the rear wheel arch; in traditional design, the front door lower trim and the front wheel arch are integrated, and the rear door lower trim and the rear wheel arch are integrated.

[0005] The lower door trim panel and wheel arches together form the lower trim panel assembly.

[0006] Traditionally, the lower trim panel assembly is usually molded as a single piece through injection molding. However, because the rear door lower trim panel is generally larger in size and the rear wheel arch is smaller in size, injection shrinkage marks often appear at the connection between the two. This leads to defects such as shrinkage marks on the decorative surface, making the car look unattractive, reducing the overall quality level of the vehicle, and lowering its grade.

[0007] In addition, the traditional lower trim panel assembly has insufficient overall structural strength and is easily damaged by impacts during the forming process.

[0008] Therefore, in order to better improve at least one of the above problems, it is necessary to optimize the design of the existing lower trim assembly. Summary of the Invention

[0009] The purpose of this invention is to provide a novel lower trim panel assembly structure that can avoid injection molding shrinkage marks at the connection between the lower trim panel and the wheel arch.

[0010] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0011] A car rear door overlap-type lower trim panel assembly includes a lower trim panel structure and a wheel arch structure, wherein the wheel arch structure overlaps the lower trim panel structure.

[0012] The lower trim panel structure includes a lower trim panel body, the lower trim panel body includes a lower trim panel outer panel, and a lower trim panel inner panel is provided on the inner side of the lower trim panel outer panel;

[0013] The wheel arch structure includes a wheel arch body, and an inner wheel arch plate is provided inside the wheel arch body;

[0014] The wheel arch body overlaps with the lower trim panel body;

[0015] The lower trim panel structure also includes a decorative panel strip on the outer panel of the lower trim panel.

[0016] The wheel arch structure is connected to the lower trim panel structure via an overlapping mechanism; the overlapping mechanism includes an overlapping plate connected to the wheel arch body, and the overlapping plate overlaps the inner panel of the lower trim panel.

[0017] The lower trim outer panel and the decorative panel bright strip are simultaneously snapped onto the lower trim inner panel; the lower trim outer panel and the decorative panel bright strip are distributed opposite to each other; the lower trim outer panel and the decorative panel bright strip are distributed on the outer side of the lower trim inner panel.

[0018] The lower trim inner panel is connected to the lower trim outer panel and the decorative panel bright strip via a snap-fit ​​mechanism; the snap-fit ​​mechanism includes a snap-fit ​​groove on the lower trim inner panel; the lower trim outer panel is provided with a decorative outer upper flange, and the decorative panel bright strip is provided with a bright strip lower flange; the bright strip lower flange and the decorative outer upper flange are inserted into the snap-fit ​​groove, and the bright strip lower flange and the decorative outer upper flange are relatively close to each other.

[0019] The lower trim panel outer plate is provided with a fixing mechanism, which includes a fixing plate connected to the lower trim panel outer plate. The fixing plate is located at one end of the lower trim panel outer plate near the wheel arch body. One end of the fixing plate is located on the lower trim panel outer plate, and the other end extends near the wheel arch structure. A top pressure plate is provided on the side of the fixing plate near the bright strip of the trim panel.

[0020] The lower trim panel includes an outer panel body, and the outer panel body has outer panel side panels at both ends;

[0021] The lower trim panel inner panel includes an inner panel body, and inner panel side panels are provided at both ends of the inner panel body. The outer panel side panels of the lower trim panel outer panel and the inner panel side panels of the lower trim panel inner panel are fitted and pressed against each other.

[0022] The upper ends of the outer panel and the inner panel are fitted together.

[0023] A support component is provided between the outer panel body and the inner panel body; the support component includes a support plate provided on the outer panel body and a plug-in plate provided on the inner panel body; the support plate is provided with a plug-in countersunk hole, and the plug-in plate is plugged into the plug-in countersunk hole of the support plate.

[0024] The plug-in plate includes an intermediate plate, an upper pressure plate on the intermediate plate, an upper guide groove on the side of the upper pressure plate away from the inner plate body; a hanging plate on the side of the intermediate plate away from the upper pressure plate, a lower guide groove on the side of the hanging plate away from the inner plate body, and a hanging groove on the hanging plate.

[0025] The inner plate body includes an upper plate, a middle plate, and a lower plate. The upper plate is connected to the lower plate through the middle plate. The upper plate and the lower plate are staggered. The middle plate intersects with both the upper plate and the lower plate.

[0026] The overlapping plate is connected to the inner panel of the lower trim panel via a fixing and limiting mechanism. The fixing and limiting mechanism includes an insertion positioning part and a fixing locking part. The insertion positioning part includes a positioning insert plate disposed on the inner panel of the lower trim panel and an insertion slot disposed on the overlapping plate. The positioning insert plate on the inner panel of the lower trim panel is inserted into the insertion slot on the overlapping plate. The fixing locking part includes an inner panel fixing hole disposed on the inner panel of the lower trim panel and an overlapping fixing hole disposed on the overlapping plate. The overlapping plate is connected to the inner panel of the lower trim panel by screws passing through the overlapping fixing hole and the inner panel fixing hole.

[0027] The advantages of this invention are:

[0028] This invention discloses an overlapping lower trim panel assembly for automotive rear doors. The invention differs from traditional lower trim panel assemblies in that it designs the lower trim panel structure and wheel arch structure as separate components, facilitating the installation and production of the lower trim panel assembly. Simultaneously, it effectively avoids injection molding shrinkage marks at the connection between the traditional lower trim panel body and the wheel arch body. Attached Figure Description

[0029] The following is a brief explanation of the contents of each of the accompanying drawings and the markings in the drawings:

[0030] Figure 1 This is a structural schematic diagram from a first perspective of the present invention.

[0031] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0032] Figure 3 This is a structural schematic diagram from a second perspective of the present invention.

[0033] Figure 4 This is a structural schematic diagram of the lower trim panel outer plate from a first-view perspective in this invention.

[0034] Figure 5 for Figure 4 A magnified view of a portion of the image.

[0035] Figure 6 This is a structural schematic diagram of the lower trim panel outer plate from a second perspective in this invention.

[0036] Figure 7 This is a structural schematic diagram of the lower trim panel outer plate from a third perspective in this invention.

[0037] Figure 8 for Figure 7A magnified view of a portion of the image.

[0038] Figure 9 This is a structural schematic diagram of the inner panel of the lower trim panel in this invention from a first-view perspective.

[0039] Figure 10 for Figure 9 A magnified view of a portion of the image.

[0040] Figure 11 This is a structural schematic diagram of the inner panel of the lower trim panel from a second perspective in this invention.

[0041] Figure 12 This is a structural schematic diagram of the inner panel of the lower trim panel from a third perspective in this invention.

[0042] Figure 13 This is a schematic diagram of the structure of the flange body in this invention.

[0043] Figure 14 for Figure 13 A magnified view of a portion of the image.

[0044] Figure 15 This is a schematic diagram of the structure of the lower trim outer panel and the lower trim inner panel after assembly, from a first-view perspective, in this invention.

[0045] Figure 16 for Figure 15 A magnified view of a portion of the image.

[0046] Figure 17 This is a schematic diagram of the structure of the decorative panel bright strip and the lower decorative panel inner panel after assembly, from a first-view perspective, in this invention.

[0047] Figure 18 This is a first-view structural schematic diagram of the lower trim panel structure in this invention.

[0048] Figure 19 This is a schematic diagram of the lower trim panel structure from a second perspective in this invention.

[0049] Figure 20 for Figure 19 A magnified view of a portion of the image.

[0050] Figure 21 This is a schematic diagram of the flange structure in this invention.

[0051] Figure 22 This is a schematic diagram of the inner flange plate in this invention.

[0052] The markings in the above figures are all:

[0053] 1. Lower trim panel structure; 11. Lower trim panel outer panel; 12. Lower trim panel inner panel; 2. Wheel arch structure; 21. Wheel arch body; 22. Wheel arch inner panel; 3. Overlapping mechanism. Detailed Implementation

[0054] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings and the description of the preferred embodiments.

[0055] A rear door overlapping lower trim panel assembly for automobiles includes a lower trim panel structure 1 and a wheel arch structure 2, wherein the wheel arch structure 2 overlaps the lower trim panel structure 1. This invention discloses a rear door overlapping lower trim panel assembly for automobiles. This invention changes the structure of the traditional lower trim panel assembly. By designing the lower trim panel structure 1 and the wheel arch structure 2 as separate structures, this invention facilitates the installation and production of the lower trim panel assembly. At the same time, it can effectively avoid injection molding shrinkage marks at the connection between the traditional lower trim panel body and the wheel arch body 21.

[0056] The lower trim panel assembly disclosed in this invention mainly changes the structure of the traditional lower trim panel assembly. The lower trim panel assembly disclosed in this invention mainly includes a lower trim panel structure 1 and a wheel arch structure 2. The lower trim panel structure 1 and the wheel arch structure 2 are connected by an overlapping method. This setting facilitates the subsequent connection between the lower trim panel structure 1 and the wheel arch structure 2.

[0057] Specifically, the lower trim panel structure 1 described in this invention includes a lower trim panel body, which is the main structure of the lower trim panel structure 1 and is mainly arranged below the rear door. The lower trim panel body also includes a lower trim panel outer panel 11, with an inner lower trim panel 12 disposed on the inner side of the outer panel 11. The lower trim panel body disclosed in this invention, through the cooperation of the outer and inner panels, not only ensures its own structural strength but also facilitates the subsequent installation and positioning of the decorative trim strip 13.

[0058] Meanwhile, the wheel arch structure 2 described in this invention includes a wheel arch body 21, and an inner wheel arch plate 22 is provided on the inner side of the wheel arch body 21. Through the above design, it can be seen that the wheel arch structure 2 disclosed in this invention is also equivalent to having an inner and outer plate structure. Such a setting can well ensure the structural strength of the wheel arch.

[0059] Furthermore, in this invention, the inner wheel arch plate includes a base plate 221, and the base plate 221 has raised edge plates 222 on both sides; the raised edge plates 222 are intersecting with the base plate 221, one end of the raised edge plate 222 is connected to the base plate 221, and the other end extends in a direction away from the base plate 221; specifically, in this invention, the included angle between the raised edge plate 222 and the base plate 221 is required to be greater than 90 degrees, as shown in the attached figure. This arrangement facilitates subsequent installation, where the base plate 221 is used to fit against the wheel arch body, and the two are connected by welding, while the raised edge plate 222 is used to press against the wheel arch body. On the inner wall of the body, it plays a good fitting and limiting role; in addition, in this invention, at least one curved edge plate 222 in the inner plate of the wheel arch is connected to a spring pressure plate 223, and the spring pressure plate 223 and the curved edge plate 222 are intersected; the vertical cross section of the spring pressure plate and the curved edge plate is V-shaped; the curved edge plate 222 is provided with a spring pressure plate 223 at the end away from the base plate 221. This arrangement gives the inner plate of the wheel arch a certain self-deformation ability, which facilitates the subsequent installation. The inner plate of the wheel arch can first press against the inner side of the wheel arch body to play a preliminary fixing role, which facilitates the subsequent welding and positioning of the base plate 221 and the wheel arch body.

[0060] Meanwhile, in order to facilitate the positioning between the inner wheel arch plate and the wheel arch body, a flanged connecting plate 201 is required at the edge of the wheel arch body. The flanged connecting plate 201 and the wheel arch body form a box structure. During subsequent installation and connection, the inner wheel arch plate is placed inside the wheel arch body. The inner wheel arch plate is pressed against the flanged connecting plate 201 by the anti-flanging plate 222 and the spring plate 223, so that the inner wheel arch plate is tensioned and fixed inside the inner wheel arch plate, which plays a good role in initial fixation and locking; and facilitates subsequent welding and fixing operations.

[0061] In actual connection, to facilitate the connection between the wheel arch structure 2 and the lower trim panel body, this invention requires the wheel arch structure 2 to overlap the lower trim panel body and to be connected to the lower trim panel inner panel 12 of the lower trim panel body. This arrangement facilitates the bridging between the wheel arch structure 2 and the lower trim panel structure 1, while also ensuring the stability and strength of the connection between the wheel arch structure 2 and the lower trim panel structure 1. Furthermore, since the wheel arch structure 2 is located inside the lower trim panel structure 1, during subsequent connection and fixing, the wheel arch structure 2 is positioned inside the lower trim panel structure 1 and is pressed against the vehicle body frame by the lower trim panel body. This installation method better limits the installation position of the lower trim panel assembly. Simultaneously, this arrangement ensures that the overlap position is inside the lower trim panel assembly, guaranteeing the flatness of the lower trim panel assembly's appearance.

[0062] Meanwhile, in this invention, the wheel arch body 21 is required to overlap the lower trim panel body. Based on this design, the connection between the lower trim panel body and the wheel arch body 21 is facilitated. In addition, the wheel arch body 21 overlaps the lower trim panel body. Since the lower trim panel body has a larger area and the overall size of the wheel arch is smaller, this setting allows the lower trim panel body to act as a fixing component during subsequent installation, so that the wheel arch body 21 can be squeezed and fixed to the vehicle body, thereby better ensuring the certainty of the wheel arch assembly position and avoiding the problem of the lower end of the wheel arch lifting up.

[0063] In actual connection, the outer panel and inner panel of the lower trim are mainly connected by snap-fit ​​and welding, while the bright strip of the decorative panel and the inner panel of the lower trim are mainly connected by snap-fit. In this invention, the wheel arch structure and the lower trim structure are mainly connected by screws. At the same time, the inner panel of the wheel arch structure and the wheel arch body are mainly connected by welding.

[0064] Furthermore, the lower trim panel structure 1 described in this invention also includes a decorative panel strip 13 disposed on the outer panel 11 of the lower trim panel; the decorative panel strip mainly serves an aesthetic purpose. In addition, in this invention, the decorative panel strip 13 also has a good snap-fit ​​and limiting function, mainly to assist in positioning the installation position of the overlapping plate 31 during subsequent installation, and at the same time to limit the top of the outer panel 11 of the lower trim panel, so as to avoid large installation offset between the outer panel 11 of the lower trim panel and the inner panel.

[0065] Furthermore, in this invention, the wheel arch structure 2 is connected to the lower trim panel structure 1 via an overlapping mechanism 3. The overlapping mechanism 3 facilitates the connection between the lower trim panel structure 1 and the wheel arch structure 2. Specifically, the overlapping mechanism 3 disclosed in this invention includes an overlapping plate 31 connected to the wheel arch body 21. In this invention, the overlapping plate 31 is an extension plate. During subsequent use, the overlapping plate 31 overlaps the lower trim panel body, and fasteners are used to connect the overlapping plate 31 to the lower trim panel body, thereby achieving the connection between the wheel arch structure 2 and the lower trim panel structure 1. In practical use, the overlapping plate 31 is required to overlap the inner panel 12 of the lower trim panel. This arrangement places the overlapping plate 31 inside the lower trim panel. Based on this arrangement, during subsequent use, the overlapping plate 31 can be positioned on the side of the lower trim panel assembly closer to the vehicle body. During subsequent fixing, the lower trim panel structure 1 can act as a pressing component, while the vehicle body can provide an inward support to the overlapping plate 31, ensuring the stability of the overlapping plate 31 during installation to a certain extent. This better ensures the structural strength of the connection between the wheel arch structure 2 and the lower trim panel structure 1.

[0066] Furthermore, in this invention, the overlapping plate is located at the end of the wheel arch body. Simultaneously, the overlapping plate and the wheel arch body are staggered, forming a stepped platform. This stepped platform creates a recessed groove structure, facilitating the subsequent installation and positioning of the decorative panel trim strip, and better ensuring the flatness of the lower trim assembly. Additionally, this invention requires a rounded transition at the end of the wheel arch body and the edge of the outer trim panel, which facilitates the installation and positioning of the decorative panel trim strip.

[0067] Furthermore, in this invention, the lower trim outer panel 11 and the decorative panel bright strip 13 are simultaneously snapped onto the lower trim inner panel 12. In actual design, the horizontal projected area of ​​the lower trim inner panel 12 is required to be equal to the horizontal projected area of ​​the lower trim outer panel 11 and the decorative panel bright strip 13. In actual design, the lower trim outer panel 11 and the decorative panel bright strip 13 are snapped onto the lower trim inner panel 12 together, and the lower trim outer panel 11 and the decorative panel bright strip 13 together cover the outside of the lower trim inner panel 12; the lower trim outer panel 11 and the decorative panel bright strip 13... This design ensures the appearance of the lower trim panel structure 1. Furthermore, this invention requires that the lower trim panel outer panel 11 and the decorative panel bright strip 13 be distributed relatively oppositely. The lower trim panel outer panel 11 and the decorative panel bright strip 13 are distributed on the outer side of the lower trim panel inner panel 12. This relatively distributed lower trim panel outer panel 11 and decorative panel bright strip 13 serve a relative calibration function during subsequent use, better ensuring the stability of the assembly position of the lower trim panel outer panel 11 and the decorative panel bright strip 13, and preventing longitudinal movement of the lower trim panel outer panel 11 relative to the lower trim panel inner panel 12.

[0068] Furthermore, in this invention, the lower trim inner panel 12 is connected to the lower trim outer panel 11 and the decorative panel bright strip 13 via a snap-fit ​​mechanism; the snap-fit ​​mechanism includes a snap-fit ​​groove 121 provided on the lower trim inner panel 12; the lower trim outer panel 11 is provided with a decorative outer upper upturned edge 111, and the decorative panel bright strip 13 is provided with a bright strip lower upturned edge 131; the bright strip lower upturned edge 131 and the decorative outer upper upturned edge 111 are inserted into the snap-fit ​​groove 121. In this invention, the lower trim outer panel 11 is snapped into the snap-fit ​​groove 121 of the lower trim inner panel 12 via the decorative outer upper upturned edge 111, and the bright strip lower upturned edge 131 of the decorative panel bright strip 13 is snapped into the snap-fit ​​groove 121. Within the groove 121, this arrangement facilitates the connection between the inner lower trim panel 12, the outer lower trim panel 11, and the decorative trim strip 13. Furthermore, in this invention, the lower flange 131 of the decorative strip and the upper flange 111 of the decorative outer panel are relatively close together. This arrangement makes the outer lower trim panel 11 and the decorative trim strip 13 essentially surface-fitted. Based on this arrangement, the relative positions of the outer lower trim panel 11 and the decorative trim strip 13 are defined. When one part is locked, the position of the other part is also determined. Therefore, based on the above design, the outer lower trim panel 11 and the decorative trim strip 13 disclosed in this invention have the function of relatively defining their positions.

[0069] Furthermore, in this invention, a fixing mechanism 4 is provided on the lower trim outer panel 11. This fixing mechanism is located at the end of the lower trim outer panel, near the overlapping plate. The fixing mechanism 4 includes a fixing plate 41 connected to the lower trim outer panel 11, with the fixing plate 41 positioned at one end of the lower trim outer panel 11 near the wheel arch body 21. One end of the fixing plate 41 is positioned on the lower trim outer panel 11, and the other end extends near the wheel arch structure 2. The fixing mechanism 4 serves two purposes: firstly, it limits the position of the wheel arch structure 2 on the lower trim structure 1; secondly, it provides... The fitting degree between the decorative panel bright strip 13 and the lower trim inner panel 12 is defined, and it also serves as a good calibrator, which helps to ensure the accuracy of the relative arrangement of the various components. At the same time, in this invention, the edge plate 41 is provided with a top pressure plate 42 on the side of the edge plate 41 near the decorative panel bright strip 13. The top pressure plate 42 is located on the side of the edge plate 41 near the decorative panel bright strip 13. In subsequent use, one end of the top pressure plate 42 is connected to the edge plate 41, and the other end presses against the inner side of the decorative panel bright strip 13. Based on this arrangement, the position of the decorative panel bright strip 13 near the lower trim inner panel 12 is defined.

[0070] Furthermore, in this invention, the lower trim outer panel 11 includes an outer panel body 112, with outer panel side panels 113 at both ends of the outer panel body 112; the lower trim inner panel 12 includes an inner panel body 122, with inner panel side panels 123 at both ends of the inner panel body 122; the outer panel side panels 113 in the lower trim outer panel 11 and the inner panel side panels 123 in the lower trim inner panel 12 are mutually fitted and pressed together; the upper end of the outer panel body 112 and the upper end of the inner panel body 122 are mutually fitted together; based on the above design, it can be understood that the lower trim outer panel disclosed in this invention... Both panel 11 and lower trim inner panel 12 are equivalent to a box structure with a groove in the central area. With this design, when the lower trim outer panel 11 and lower trim inner panel 12 are assembled laterally, in addition to the outer panel body 112 and inner panel body 122 in the central area fitting together, the lower trim outer panel 11 and lower trim inner panel 12 also have fitting areas on both sides. This arrangement ensures that the lower trim outer panel 11 and lower trim inner panel 12 have fitting areas on at least three sides, which can better guarantee the integrity of the lower trim outer panel 11 and lower trim inner panel 12.

[0071] Furthermore, in this invention, a support component is provided between the outer panel body 112 and the inner panel body 122. Through the provision of this support component, the insertion and positioning between the outer panel body 112 and the inner panel body 122 can be better achieved, facilitating position determination before welding and ensuring the accuracy of the welding position. Additionally, the support component in this invention includes a support plate 114 disposed on the outer panel body 112 and an insertion plate 51 disposed on the inner panel body 122. The support plate 114 has a countersunk hole 115, and the insertion plate 51 is inserted into the countersunk hole 115 of the support plate 114. One function of the support plate 114 in this invention is to increase the lower trim level. The overall structural strength of the outer panel 11 is improved. Furthermore, in this invention, the supporting plate 114 is provided with a countersunk hole 115, which serves as a basic connection, facilitating the subsequent installation and connection of the connecting plate 51. The inner panel body 122 is inserted into the countersunk hole 115 via the connecting plate 51. Based on this arrangement, the connection between the outer panel body 112 and the inner panel body 122 is limited. Simultaneously, in this invention, the aforementioned supporting components are arranged horizontally. This arrangement can limit the longitudinal position of the lower trim outer panel 11 and the lower trim inner panel 12, preventing vertical misalignment between them. It also facilitates the subsequent welding of the lower trim outer panel 11 and the lower trim inner panel 12 to prevent panel displacement.

[0072] As a further optimization, the outer side panel 113 of this invention is provided with a side locking block 1131, and the inner side panel 123 is provided with a side locking groove 1231. During subsequent connection, the inner side panel 123 is sleeved on the side locking block 1131 on the outer side panel 113 through the side locking groove 1231. Based on the above design, the lower trim outer panel 11 and the lower trim inner panel 12 are reconnected. At the same time, in this invention, the side locking block 1131 is arranged along the X-axis direction of the vehicle body. After the side locking groove 1231 is engaged with the side locking block 1131, a limit is formed between the lower trim outer panel 11 and the lower trim inner panel 12 along the Y-direction of the vehicle. This setting further increases the difficulty of detaching the lower trim outer panel 11 and the lower trim inner panel 12.

[0073] Meanwhile, the plug-in plate 51 in this invention includes an intermediate plate 511, an upper pressure plate 512 on the intermediate plate 511, an upper guide groove 513 on the side of the upper pressure plate 512 away from the inner plate body 122; a hanging plate 514 on the side of the intermediate plate 511 away from the upper pressure plate 512, a lower guide groove on the side of the hanging plate 514 away from the inner plate body 122, and a hanging recess 515 on the hanging plate 514; through the above design, the plug-in plate 51 can be conveniently plugged into the plug-in recess 115; at the same time, the hanging recess 515 formed on the hanging plate 514 makes a hook structure formed below the plug-in plate disclosed in this invention, which to a certain extent avoids the separation of the lower trim outer plate 11 and the lower trim inner plate 12; ensures the integrity of the lower trim structure 1, and better avoids the relative rotation of the two plates when welding the lower trim inner plate 12 and the lower trim outer plate 11.

[0074] Furthermore, in this invention, the inner panel body 122 includes an upper panel 1221, a middle panel 1222, and a lower panel 1223. The upper panel 1221 is connected to the lower panel 1223 through the middle panel 1222. The upper panel 1221 and the lower panel 1223 are staggered. The middle panel 1222 intersects with both the upper panel 1221 and the lower panel 1223. The vertical cross-section of the inner panel body 122 of this invention is lightning-shaped. This arrangement not only enhances the overall structure of the inner panel body 122 but also forms a cavity below the lower trim inner panel 12. This cavity facilitates the arrangement and placement of the aforementioned support components and reduces installation interference.

[0075] Meanwhile, the cavity mentioned above in this invention also serves as a good drainage function, preventing water from accumulating in the lower trim panel assembly. In actual design, it is required that a drainage hole 1224 be opened on the middle plate 1222, and the middle plate 1222 has a structure that is high at both ends and low in the middle. This setting allows water entering the lower trim panel structure 1 to quickly enter the cavity mentioned above, preventing water from accumulating and entering the door area. After the water enters the cavity, it is drained out through the joint area between the lower trim panel inner plate 12 and the lower trim panel outer plate 11, ultimately preventing water accumulation. At the same time, in order to better limit the position of water flow, this invention requires that a drainage plate 1225 be provided at the edge of the middle plate 1222. The drainage plate 1225 is inclined. This setting can control the water flow area and prevent water from flowing towards the vehicle body.

[0076] Furthermore, in this invention, the overlapping plate 31 is connected to the lower trim panel structure through a fixing and limiting mechanism, mainly connected to the lower trim panel inner plate 12 in the lower trim panel structure; the fixing and limiting mechanism is set in this invention mainly to achieve locking and fixing between the wheel arch structure 2 and the lower trim panel structure 1.

[0077] Specifically, the fixed limiting mechanism described in this invention includes an insertion positioning part and a fixed locking part. In this invention, the insertion positioning part is mainly used for positioning when the overlapping plate 31 is connected to the lower trim panel structure 1, while the fixed locking part is mainly used for locking and fixing the overlapping plate 31 and the lower trim panel structure 1, so as to realize the fixed connection between the two, that is, to realize the fixed connection between the wheel arch structure 2 and the lower trim panel structure 1.

[0078] In this invention, the insertion positioning part includes a positioning insert 35 disposed on the inner panel 12 of the lower trim panel and / or the outer panel of the lower trim panel and / or the bright strip of the decorative panel, and an insertion slot 32 disposed on the overlapping plate 31; the positioning insert 35 on the inner panel 12 of the lower trim panel is inserted into the insertion slot 32 on the overlapping plate 31; the positioning insert 35 on the outer panel of the lower trim panel is inserted into the corresponding insertion slot 32 on the overlapping plate 31; the positioning insert 35 on the bright strip of the decorative panel is inserted into the corresponding insertion slot 32 on the overlapping plate 31; through the cooperation of the positioning insert 35 and the insertion slot 32, the relative position of the overlapping plate 31 and the lower trim panel structure 1 is determined.

[0079] Meanwhile, as a further optimization, in this invention, the positioning inserts on the inner panel of the lower trim panel, the outer panel of the lower trim panel, and the bright strip of the decorative panel are arranged in different directions, that is, the positioning inserts on the three panels are arranged in different tilt directions. This setting allows the overlapping plate to be limited in multiple directions and positions when the corresponding positioning inserts are inserted into the corresponding insertion slots, thus better ensuring the limitation of the overlapping plate position.

[0080] The fixing and locking part includes an inner panel fixing hole provided on the inner panel 12 of the lower trim panel and an overlapping fixing hole 33 provided on the overlapping plate 31; the overlapping plate 31 is connected to the inner panel 12 of the lower trim panel by screws 34 passing through the overlapping fixing hole 33 and the inner panel fixing hole; the connection between the overlapping plate 31 and the inner panel 12 of the lower trim panel is realized by screws 34 passing through the overlapping plate 31 and the inner panel 12 of the lower trim panel, thereby realizing the connection between the wheel arch structure 2 and the lower trim panel structure 1.

[0081] In actual connection of the decoration, it is required that the overlapping plate 31 be assembled with each overlapping positioning part of the lower trim inner panel and lower trim outer panel in the lower trim structure first. After the assembly is completed, the fixing operation of the solid overlapping plate 31 of the fixing locking part is then used. This connection method can reduce the alignment time of the screw 34 and the overlapping fixing hole 33 with the inner panel fixing hole and improve the assembly efficiency of the wheel arch structure 2 and the lower trim structure 1.

[0082] Obviously, the specific implementation of this invention is not limited to the above-described methods. Any non-substantial improvements made using the inventive concept and technical solution of this invention are within the protection scope of this invention.

Claims

1. A rejoined lower trim panel assembly for a car rear door, characterized in that, It includes a lower trim panel structure and a wheel arch structure, wherein the wheel arch structure overlaps the lower trim panel structure; The lower trim panel structure includes a lower trim panel body, the lower trim panel body includes a lower trim panel outer panel, and a lower trim panel inner panel is provided on the inner side of the lower trim panel outer panel; The wheel arch structure includes a wheel arch body, and an inner wheel arch plate is provided inside the wheel arch body; The wheel arch body overlaps the lower trim panel body; The lower trim panel structure also includes a decorative panel strip disposed on the outer panel of the lower trim panel; The lower trim panel outer plate is provided with a fixing mechanism, which includes a fixing plate connected to the lower trim panel outer plate. The fixing plate is located at one end of the lower trim panel outer plate near the wheel arch body. One end of the fixing plate is located on the lower trim panel outer plate, and the other end extends near the wheel arch structure. A top pressure plate is provided on the side of the fixing plate near the bright strip of the trim panel.

2. The automotive rear door overlapping lower trim panel assembly according to claim 1, characterized in that, The wheel arch structure is connected to the lower trim panel structure via an overlapping mechanism; the overlapping mechanism includes an overlapping plate connected to the wheel arch body, and the overlapping plate overlaps the inner panel of the lower trim panel.

3. The automotive rear door overlapping lower trim panel assembly according to claim 1, characterized in that, The lower trim outer panel and the decorative panel bright strip are simultaneously snapped onto the lower trim inner panel; the lower trim outer panel and the decorative panel bright strip are distributed opposite to each other; the lower trim outer panel and the decorative panel bright strip are distributed on the outer side of the lower trim inner panel.

4. The automotive rear door overlapping lower trim panel assembly according to claim 3, characterized in that, The lower trim inner panel is connected to the lower trim outer panel and the decorative panel bright strip via a snap-fit ​​mechanism; the snap-fit ​​mechanism includes a snap-fit ​​groove on the lower trim inner panel; the lower trim outer panel is provided with a decorative outer upper flange, and the decorative panel bright strip is provided with a bright strip lower flange; the bright strip lower flange and the decorative outer upper flange are inserted into the snap-fit ​​groove, and the bright strip lower flange and the decorative outer upper flange are relatively close to each other.

5. A rejoined lower trim panel assembly for a vehicle rear door according to any one of claims 1-4, characterized in that, The lower trim panel includes an outer panel body, and the outer panel body has outer panel side panels at both ends; The lower trim panel inner panel includes an inner panel body, and inner panel side panels are provided at both ends of the inner panel body. The outer panel side panels of the lower trim panel outer panel and the inner panel side panels of the lower trim panel inner panel are fitted and pressed against each other. The upper ends of the outer panel and the inner panel are fitted together.

6. The automotive rear door overlapping lower trim panel assembly according to claim 5, characterized in that, A support component is provided between the outer panel body and the inner panel body; the support component includes a support plate provided on the outer panel body and a plug-in plate provided on the inner panel body; the support plate is provided with a plug-in countersunk hole, and the plug-in plate is plugged into the plug-in countersunk hole of the support plate.

7. The automotive rear door overlapping lower trim panel assembly according to claim 6, characterized in that, The plug-in plate includes an intermediate plate, an upper pressure plate on the intermediate plate, an upper guide groove on the side of the upper pressure plate away from the inner plate body; a hanging plate on the side of the intermediate plate away from the upper pressure plate, a lower guide groove on the side of the hanging plate away from the inner plate body, and a hanging groove on the hanging plate.

8. The automotive rear door overlapping lower trim panel assembly according to claim 5, characterized in that, The inner plate body includes an upper plate, a middle plate, and a lower plate. The upper plate is connected to the lower plate through the middle plate. The upper plate and the lower plate are staggered. The middle plate intersects with both the upper plate and the lower plate.

9. The automotive rear door overlapping lower trim panel assembly according to claim 2, characterized in that, The overlapping plate is connected to the lower trim panel structure through a fixed limiting mechanism; the fixed limiting mechanism includes an insertion positioning part and a fixed locking part.

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