Rear door side wall assembly and vehicle

Abstract

The application discloses a rear door side wall assembly and a vehicle, and relates to the technical field of vehicle structures, in particular to a rear door side wall assembly and a vehicle. The rear door side wall assembly comprises a side wall inner plate, a rear wheel cover inner plate and a rear wheel cover outer plate, a C-column reinforcing plate, and a locking buckle mounting point. The side wall inner plate is provided with a mounting via hole for mounting a safety belt retractor. The rear wheel cover inner plate is connected to the inner side of the rear wheel cover outer plate, and the rear wheel cover inner plate is connected to the lower side of the side wall inner plate. The C-column reinforcing plate is connected to the outer sides of the side wall inner plate and the rear wheel cover outer plate, and a reinforcing cavity is defined between the side wall inner plate and the rear wheel cover outer plate. The C-column reinforcing plate is provided with a locking buckle mounting point. The rear door side wall assembly of the application increases the local structural strength by adding the C-column reinforcing plate, reduces the vibration generated when the door is closed, and further reduces the door closing sound. In addition, the reinforcing cavity is formed inside to seal the sound, further improves the reduction effect of the door closing sound, and improves the quality of the door closing sound.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of vehicle manufacturing, in particular to a rear door side wall assembly and a vehicle with the same. BACKGROUND

[0002] Vehicles have been a common means of transportation in people's daily life, and the riding experience of passengers is also a major concern. The car door closing sound is mainly generated by the vibration of the door and the side wall sheet metal during the contact moment of the door lock and the lock catch. The rear side wall of the rear door lock catch position is a sheet metal cavity. When the lock collides with the lock catch during the door closing process, the local sheet metal vibrates and quickly transmits the vibration to the surrounding lock catch. The reflection sound is generated in the central cavity of the side wall and is amplified instantaneously. The quality of the door closing sound is not good, and there is room for improvement. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, the present application provides a rear door side wall assembly which enhances the structural strength to reduce the vibration generated when the lock collides with the lock catch, thereby reducing the door closing sound. At the same time, a reinforcing cavity is formed to enclose the sound, further improving the reduction effect on the door closing sound and improving the quality of the door closing sound.

[0004] The rear door side wall assembly according to an embodiment of the present application comprises: a side wall inner plate provided with a mounting through hole for mounting a seat belt retractor; a rear wheel cover inner plate and a rear wheel cover outer plate, the rear wheel cover inner plate being connected to the inner side of the rear wheel cover outer plate, and the rear wheel cover inner plate being connected to the lower side of the side wall inner plate; a C-pillar reinforcing plate connected to the outer sides of the side wall inner plate and the rear wheel cover outer plate, and defining a reinforcing cavity with the side wall inner plate and the rear wheel cover outer plate, the C-pillar reinforcing plate being provided with a lock catch mounting point.

[0005] The rear door side wall assembly according to an embodiment of the present application increases the structural strength of the C-pillar by adding a C-pillar reinforcing plate, and connects the C-pillar reinforcing plate to the side wall inner plate and the rear wheel cover outer plate to further improve the local structural strength, reduce the vibration generated when the door is closed, and thereby reduce the door closing sound. In addition, the interior forms a reinforcing cavity to enclose the sound, further improving the reduction effect on the door closing sound and improving the quality of the door closing sound.

[0006] The rear door side wall assembly according to some embodiments of the present application further comprises an interior trim panel assembly located on the inner side of the side wall inner plate, and the interior trim panel assembly and the side wall inner plate define an internal sound absorbing cavity in communication with the mounting through hole.

[0007] The rear door side wall assembly according to some embodiments of the present application is provided with sound absorbing cotton in the internal sound absorbing cavity.

[0008] According to the rear door side wall assembly of some embodiments of the present application, the interior trim panel assembly comprises a first interior trim panel, a second interior trim panel and a third interior trim panel, the first interior trim panel and the second interior trim panel are distributed on the inner side of the interior side wall panel, and the third interior trim panel is located on the inner side of the second interior trim panel and jointly defines a sound insulation gap.

[0009] According to the rear door side wall assembly of some embodiments of the present application, the second interior trim panel is formed with a mounting groove recessed away from the interior side wall panel at a position opposite to the mounting through hole, and the mounting groove is provided with sound-absorbing cotton.

[0010] According to the rear door side wall assembly of some embodiments of the present application, further comprising a side wall outer panel, the C-pillar reinforcement plate is located between the side wall outer panel and the interior side wall panel, and a sound insulation area is formed between the C-pillar reinforcement plate and the side wall outer panel.

[0011] According to the rear door side wall assembly of some embodiments of the present application, the side wall outer panel comprises a side wall front segment and a side wall rear segment, the side wall front segment is connected to the front side of the side wall rear segment, and the side wall front segment and the side wall rear segment are connected with the interior side wall panel respectively.

[0012] According to the rear door side wall assembly of some embodiments of the present application, the C-pillar reinforcement plate is provided with a lap joint surface in the circumferential direction, and the lap joint surface is used to be connected with the interior side wall panel and the rear wheel cover outer panel.

[0013] According to the rear door side wall assembly of some embodiments of the present application, the lap joint surface located on the part of the front side of the C-pillar reinforcement plate is provided with the lock catch mounting point.

[0014] The present application further discloses a vehicle.

[0015] According to the vehicle of the embodiments of the present application, any one of the above rear door side wall assemblies is provided.

[0016] The vehicle and the above rear door side wall assembly have the same advantages as the prior art, which will not be repeated here.

[0017] Additional aspects and advantages of the present application will be made apparent from the following description, which, taken in conjunction with the accompanying drawings, which are shown by way of illustration. BRIEF DESCRIPTION OF DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0019] Figure 1 is a schematic diagram of the mounting position of the rear door side wall assembly of the embodiments of the present application on a vehicle;

[0020] Figure 2 is a schematic structural diagram of an interior trim panel assembly of a rear door side panel assembly according to an embodiment of the present invention;

[0021] Figure 3 The structure of the rear door side panel assembly according to an embodiment of the present invention is shown in FIG. Figure 1 ;

[0022] Figure 4 is a schematic structural diagram of a side panel outer panel of a rear door side panel assembly according to an embodiment of the present invention;

[0023] Figure 5 The structure of the rear door side panel assembly according to an embodiment of the present invention is shown in FIG. Figure 2 ;

[0024] Figure 6 The structure of the rear door side panel assembly according to an embodiment of the present invention is shown in FIG. Figure 3 ;

[0025] Figure 7 The structure of the rear door side panel assembly according to an embodiment of the present invention is shown in FIG. Figure 4 ;

[0026] Figure 8 yes Figure 7 Schematic diagram of the cross section at AA in the middle;

[0027] Figure 9 yes Figure 7 Schematic diagram of the cross section at BB in the middle.

[0028] Reference numerals:

[0029] Rear door side assembly 100,

[0030] Side panel inner panel 11, mounting hole 111, internal sound-absorbing cavity 112, sound-absorbing cotton 113, rear wheelhouse inner panel 12, rear wheelhouse outer panel 13, C-pillar reinforcement plate 14, overlapping surface 141, lock mounting point 142, interior panel assembly 15, first interior panel 151, second interior panel 152, third interior panel 153, sound-absorbing gap 154, mounting groove 155, side panel outer panel 16, side panel rear section 161, side panel front section 162, sound-absorbing area 163. DETAILED DESCRIPTION

[0031] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0032] In the description of the present application, it is to be understood by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the features defined as "first", "second" can be explicitly or implicitly included one or more features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0033] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication between the two elements inside. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] Unless otherwise specified, the front-rear direction in the present application is the longitudinal direction of the vehicle, i.e. the X direction; the left-right direction is the lateral direction of the vehicle, i.e. the Y direction; the up-down direction is the vertical direction of the vehicle, i.e. the Z direction.

[0035] Reference is made below Figures 1-9 The rear door side wall assembly 100 according to an embodiment of the present application is described, by setting the C pillar reinforcing plate 14, and connecting the C pillar reinforcing plate 14 with the side wall inner plate 11 and the rear wheel cover inner plate 12 to improve the structural strength, reduce the local vibration generated when the door is closed, and further reduce the door closing sound. At the same time, the sound generated when the door is closed can be enclosed in the reinforcing cavity, further reducing the door closing sound.

[0036] As Figure 3 The rear door side wall assembly 100 according to an embodiment of the present application, as shown, comprises: a side wall inner plate 11, a rear wheel cover inner plate 12, a rear wheel cover outer plate 13 and a C pillar reinforcing plate 14.

[0037] The side wall inner plate 11 is provided with a mounting via hole 111 for mounting a seat belt retractor. The seat belt is an indispensable part of the vehicle interior, and as an important part of passenger safety protection, it exists in the vehicle interior, such as Figure 6As shown, the mounting through hole 111 is arranged on the side wall inner panel 11, and is arranged at a position of the side wall inner panel 11 facing the vehicle interior, and provides a mounting point for the seat belt retractor, so as to ensure the installation of the seat belt, and further ensure the safety of the rear passengers.

[0038] The rear wheel cover inner panel 12 is connected to the inner side of the rear wheel cover outer panel 13, and is connected to the lower side of the side wall inner panel 11. That is, the rear door side wall assembly 100 comprises the rear wheel cover inner panel 12 and the rear wheel cover outer panel 13, both of which are arranged around the rear wheel and are curved towards the rear wheel. The rear wheel cover inner panel 12 is located at the side of the rear wheel cover outer panel 13 facing the vehicle interior, and is connected to the side wall inner panel 11 at the lower side of the side wall inner panel 11. That is, the side wall inner panel 11 and the rear wheel cover inner panel 12 are arranged in a top-down manner, and are connected to each other to improve the structural strength, reduce vibration, and further reduce the door closing noise.

[0039] The C-pillar reinforcement panel 14 is connected to the outer sides of the side wall inner panel 11 and the rear wheel cover outer panel 13, and defines a reinforcement cavity together with the side wall inner panel 11 and the rear wheel cover outer panel 13. Understandably, the C-pillar reinforcement panel 14 can enhance the structural strength of the C-pillar. The C-pillar reinforcement panel 14 is arranged at the side of the side wall inner panel 11 and the rear wheel cover outer panel 13 facing the vehicle exterior, and defines a reinforcement cavity together with the side wall inner panel 11 and the rear wheel cover outer panel 13. The reinforcement cavity can seal the sound when the door is closed. At the same time, the C-pillar reinforcement panel 14 is provided with a lock catch mounting point 142, which provides a mounting position for the lock catch of the rear door, so that the lock catch can be installed, and the rear door can be closed and locked.

[0040] Specifically, the lock catch mounting point 142 is arranged on the C-pillar reinforcement panel 14. During the closing process of the door, the door lock collides with the lock catch, and vibration is generated after the collision. The vibration can be dispersed through the C-pillar reinforcement panel 14, and does not directly act on the side wall inner panel 11 and the rear wheel cover outer panel 13. The noise generated by the vibration can be transmitted to the C-pillar reinforcement panel 14 and the reinforcement cavity in turn, and after being dispersed and absorbed by the C-pillar reinforcement panel 14 and the reinforcement cavity, the amount of vibration transmitted to the side wall inner panel 11 and the rear wheel cover can be reduced. That is, the vibration noise generated by the collision of the lock catch is absorbed by the C-pillar reinforcement panel 14 and the reinforcement cavity before being transmitted into the reinforcement cavity, so that the vibration noise is not reflected and amplified in the reinforcement cavity between the side wall inner panel 11 and the side wall outer panel 16, the door closing noise is reduced, and the feeling of closing the door thickly when the lock catch contacts the C-pillar reinforcement panel 14 is enhanced.

[0041] According to the rear door side wall assembly 100 of the embodiment of the present application, the structural strength of the C pillar is improved by adding the C pillar reinforcing plate 14, the local structural strength is further improved by connecting the C pillar reinforcing plate 14 with the side wall inner plate 11 and the rear wheel cover outer plate 13, the vibration generated when the door is closed is reduced, the door closing sound is reduced, the reinforcing cavity is formed inside to close the sound, the reduction effect of the door closing sound is further improved, and the quality of the door closing sound is improved.

[0042] In some embodiments, the rear door side wall assembly 100 further comprises an interior trim panel assembly 15 located on the inner side of the side wall inner plate 11, and the interior trim panel assembly 15 and the side wall inner plate 11 define an internal sound absorption cavity 112 in communication with the mounting through hole 111. By arranging the interior trim panel assembly 15 on the inner side of the side wall inner plate 11, the interior trim panel assembly 15 can shield the side wall inner plate 11 and the like from the inside of the vehicle, especially the mounting through hole 111, so that the side wall inner plate 11 and the like are not directly exposed to the inside of the vehicle in a large area, and the interior trim panel assembly 15 can be used to decorate the inside of the vehicle, improving the interior aesthetics.

[0043] Meanwhile, the internal sound absorption cavity 112 is formed between the interior trim panel assembly 15 and the side wall inner plate 11, as shown in Figure 9 The internal sound absorption cavity 112 can diffuse and absorb the sound generated when the door is closed, thereby reducing the door closing sound. It should be noted that the internal sound absorption cavity 112 is connected to the mounting through hole 111, that is, the sound is diffused to the mounting through hole 111, that is, when the door is closed, the lock vibration sound at the C pillar reinforcing plate 14 can be transmitted to the reinforcing cavity, and diffused from the mounting through hole 111 to the internal sound absorption cavity 112, and then further absorbed and weakened by the internal sound absorption cavity 112.

[0044] In some embodiments, the internal sound absorption cavity 112 is provided with sound absorption cotton 113. Thus, the sound absorption cotton 113 can absorb the sound transmitted to the internal sound absorption cavity 112, that is, the sound generated when the door is closed can be absorbed, further reducing the door closing sound.

[0045] Specifically, the sound absorption cotton 113 is arranged in the internal sound absorption cavity 112, that is, the sound generated when the door is closed is diffused in the internal sound absorption cavity 112, effectively reducing the door closing sound, and the sound absorption ability of the sound absorption cotton 113 can be used to further absorb the sound, enhancing the reduction effect of the door closing sound.

[0046] In some embodiments, the interior trim panel assembly 15 comprises a first interior trim panel 151, a second interior trim panel 152 and a third interior trim panel 153, the first interior trim panel 151 and the second interior trim panel 152 are distributed on the inner side of the side wall inner plate 11, and the third interior trim panel 153 is located on the outer side of the second interior trim panel 152 and defines a sound attenuation gap 154 together. Specifically, as shown in Figure 2As shown, the first interior panel 151 and the second interior panel 152 are both located on the inner side of the side inner panel 11, and the area of ​​the second interior panel 152 is larger than that of the first interior panel 151. The first interior panel 151 can be arranged at the upper part of the longitudinal rear side of the second interior panel 152, and an internal sound absorption cavity 112 is defined between the first interior panel 151 and the second interior panel 152 and the side inner panel 11. At the same time, the third interior panel 153 is located on the inner side of the second interior panel 152, and there is a gap between the third interior panel 153 and the second interior panel 152, together defining a sound-absorbing gap 154.

[0047] It can be understood that the sound-absorbing gap 154 ​​and the internal sound-absorbing cavity 112 have the same function, both of which can diffuse the sound therein to gradually weaken it, thereby reducing the door closing sound.

[0048] Therefore, if Figure 8 As shown, when the lock at the C-pillar reinforcement plate 14 generates vibration noise, the sound can be transmitted from the reinforcement cavity and the mounting through-hole 111 to the internal sound-absorbing cavity 112 between the first interior panel 151 and the second interior panel 152 and the side inner panel 11, and can be dispersed through the internal sound-absorbing cavity 112 to the sound-absorbing gap 154 ​​between the third interior panel 153 and the second interior panel 152, so that the vibration noise is absorbed in multiple layers through multiple chambers and gaps, thereby reducing the vibration noise and improving the noise reduction effect.

[0049] It should be noted that the second interior panel 152 and the third interior panel 153 block the mounting hole 111 on the side facing the interior of the vehicle body. That is, when the sound diffuses to the mounting hole 111, the sound will not directly enter the vehicle from the mounting hole 111 and cause a bad riding experience for the passengers, thereby ensuring the comfort of the user in the vehicle.

[0050] In some embodiments, the second interior trim panel 152 is formed with a mounting groove 155 at a position opposite to the mounting hole 111, which is recessed away from the side inner panel 11, and a sound-absorbing cotton 113 is disposed in the mounting groove 155. Figure 7 and Figure 9 As shown, the second interior trim panel 152 is formed with a mounting groove 155, which is recessed in a direction away from the side inner panel 11, and a sound-absorbing cotton 113 can be arranged in the mounting groove 155. The sound-absorbing cotton 113 is arranged opposite to the mounting through-hole 111, so that after the noise in the reinforcement cavity enters the internal sound-absorbing cavity 112 from the mounting through-hole 111, it can be actively absorbed by the sound-absorbing cotton 113 at the mounting groove 155, thereby reducing the sound generated when the door is closed.

[0051] That is to say, the sound-absorbing cotton 113 can be set at different positions in the internal sound-absorbing cavity 112, that is, it can be set in the first interior panel 151, the second interior panel 152 or the side inner panel 11. For example, the sound-absorbing cotton 113 can be set in the installation groove 155 of the second interior panel 152, so as to achieve the absorption of vibration noise.

[0052] Among them, the number of sound-absorbing cottons 113 can be increased to improve the absorption and weakening effect of sound and enhance the effect of reducing the door closing sound.

[0053] In some embodiments, the rear door side panel assembly 100 further includes a side panel outer panel 16, the C-pillar reinforcement panel 14 is located between the side panel outer panel 16 and the side panel inner panel 11, and a sound-absorbing area 163 is formed between the C-pillar reinforcement panel 14 and the side panel outer panel 16. Figures 7-8 As shown, a C-pillar reinforcement plate 14 is provided between the side panel inner panel 11 and the side panel outer panel 16, and a sound-absorbing area 163 is formed between the C-pillar reinforcement plate 14 and the side panel outer panel 16. That is, within the sound-absorbing area 163, the sound diffused into the reinforcement cavity can be further reduced from being transmitted outward, the sound can be further weakened, and the effect of reducing the door closing sound can be enhanced.

[0054] Therefore, when the C-pillar reinforcement plate 14 generates vibration noise, the vibration noise can be dispersed and absorbed inward into the reinforcement cavity, and can also be dispersed and absorbed outward into the silencer area 163, thereby achieving noise dispersion in different directions and effectively reducing the sound of closing the door.

[0055] In some embodiments, the side panel outer panel 16 includes a side panel front section 162 and a side panel rear section 161. The side panel front section 162 is connected to the front side of the side panel rear section 161. The side panel front section 162 and the side panel rear section 161 are respectively connected to the side panel inner panel 11. Figure 4 As shown, the side panel front section 162 and the side panel rear section 161 are distributed in sequence along the front and rear directions, and the side panel front section 162 is connected to the front area of ​​the side panel inner panel 11, and the side panel rear section 161 is connected to the rear area of ​​the side panel inner panel 11.

[0056] Among them, the side panel front section 162 and the side panel rear section 161 are connected as a whole and are commonly connected to the side panel inner panel 11, wherein the C-pillar reinforcement plate 14 is located between the side panel inner panel 11 and the side panel outer panel 16, so that the front area of ​​the C-pillar reinforcement plate 14 is connected to the side panel front section 162, and the rear area of ​​the C-pillar reinforcement plate 14 is connected to the side panel rear section 161, thereby realizing vibration dispersion at the locking position and reducing the door closing sound.

[0057] In some embodiments, the C-pillar reinforcing plate 14 is provided with a lap joint surface 141 in the circumferential direction, which is used to be connected to the side wall inner plate 11 and the rear wheel cover outer plate 13. The C-pillar reinforcing plate 14 is connected to the side wall inner plate 11 and the rear wheel cover outer plate 13, and the lap joint surface 141 is provided on the C-pillar reinforcing plate 14, which is used to connect the C-pillar reinforcing plate 14 to the side wall inner plate 11 and the rear wheel cover outer plate 13, that is, the side wall inner plate 11 and the rear wheel cover outer plate 13 are connected to the C-pillar reinforcing plate 14 at the lap joint surface 141, and the connection can be achieved by welding at the lap joint surface 141.

[0058] As shown in Figure 5 , the lap joint surface 141 is formed at the circumferential edge of the C-pillar reinforcing plate 14, that is, the lap joint surface 141 can be an annular flange surface, so that the C-pillar reinforcing plate 14 can be fixed and welded to the side wall inner plate 11 and the rear wheel cover outer plate 13 at any position in the circumferential direction, so that the formed reinforcing cavity is a closed cavity in the circumferential direction, which is beneficial to the sealing and absorption of vibration noise and enhances the noise reduction effect.

[0059] In some embodiments, the lap joint surface 141 is provided with a lock mounting point 142 at the front side of the C-pillar reinforcing plate 14. Specifically, as shown in Figure 5 , the lap joint surface 141 is provided on the C-pillar reinforcing plate 14, and the lock mounting point 142 is located at the position of the lap joint surface 141 facing the front side of the vehicle body, which is used to provide a mounting position for the lock, and the lock mounting point 142 is arranged on the C-pillar reinforcing plate 14, so that when the lock collides with the lock, the amplitude of the lock mounting point 142 at the moment of closing the door can be reduced, thereby reducing the closing sound.

[0060] In some embodiments, the reinforcing ribs are provided on the rear wheel cover outer plate 13, which can reduce and absorb vibration, avoid direct transmission of the closing sound outward, thereby reducing the closing sound and further enhancing the effect of reducing the closing sound.

[0061] The application also discloses a vehicle.

[0062] The vehicle according to the embodiments of the application comprises the rear door side wall assembly 100 of any of the above embodiments, the C-pillar reinforcing plate 14 is connected to the side wall inner plate 11 and the rear wheel cover outer plate 13 to improve the structural strength and reduce the vibration generated when the door is closed, thereby reducing the closing sound. At the same time, the reinforcing cavity is formed in the rear door side wall assembly 100 to seal the sound, and the sound-absorbing cotton 113 is arranged in the rear door side wall assembly 100 to absorb the sound, thereby further enhancing the effect of reducing the closing sound and improving the quality of the closing sound.

[0063] In the description of the specification, reference to "one embodiment", "some embodiments", "an exemplary embodiment", "an example", "a specific example", or "some examples" means that a particular feature, structure, material, or characteristic being described is included in at least one embodiment or example of the application. The appearances of the phrases "in one embodiment", "in some embodiments", "in an exemplary embodiment", "an example", "a specific example", or "some examples" in various places in the specification are not necessarily referring to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0064] Although embodiments of the application have been shown and described, it will be appreciated that those skilled in the art can make various changes, modifications, substitutions and alterations thereto without departing from the principles and scope of the application, which are defined by the claims and their equivalents.

Claims

1. A rear door side panel assembly, characterized in that: include: A side panel inner plate, wherein the side panel inner plate is provided with a mounting hole for mounting a seat belt retractor; a rear wheelhouse inner panel and a rear wheelhouse outer panel, wherein the rear wheelhouse inner panel is connected to the inner side of the rear wheelhouse outer panel, and the rear wheelhouse inner panel is connected to the lower side of the side panel inner panel; a C-pillar reinforcement plate, the C-pillar reinforcement plate being connected to the outer sides of the side panel inner panel and the rear wheelhouse outer panel, defining a reinforcement cavity between the C-pillar reinforcement plate and the side panel inner panel and the rear wheelhouse outer panel, and the C-pillar reinforcement plate being provided with a latch mounting point; An interior panel assembly is located on the inner side of the side panel inner panel, and an internal sound absorption cavity connected to the mounting through hole is defined between the interior panel assembly and the side panel inner panel. The interior panel assembly includes a first interior panel, a second interior panel, and a third interior panel. The first interior panel and the second interior panel are distributed on the inner side of the side panel inner panel, and the third interior panel is located on the inner side of the second interior panel and together define a sound absorption gap.

2. The rear door side panel assembly according to claim 1, characterized in that: Sound-absorbing cotton is arranged in the internal sound-absorbing cavity.

3. The rear door side panel assembly according to claim 1, characterized in that: The second interior trim panel is formed with an installation groove at a position directly opposite to the installation through hole, which is recessed away from the side inner panel, and sound-absorbing cotton is arranged in the installation groove.

4. The rear door side panel assembly according to claim 1, characterized in that: It also includes a side outer panel, the C-pillar reinforcement panel is located between the side outer panel and the side inner panel, and a sound-absorbing area is formed between the C-pillar reinforcement panel and the side outer panel.

5. The rear door side panel assembly according to claim 4, characterized in that: The side panel outer plate includes a side panel front section and a side panel rear section, the side panel front section is connected to the front side of the side panel rear section, and the side panel front section and the side panel rear section are respectively connected to the side panel inner plate.

6. The rear door side panel assembly according to claim 1, characterized in that: The C-pillar reinforcement plate is provided with an overlapping surface in the circumferential direction, and the overlapping surface is used to be bonded and connected with the side inner panel and the rear wheel housing outer panel.

7. The rear door side panel assembly according to claim 6, characterized in that: The portion of the overlapping surface located in front of the C-pillar reinforcement plate is provided with the lock mounting point.

8. A vehicle, characterized in that: A rear door side panel assembly according to any one of claims 1 to 7 is provided.

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