Rear vehicle door side wall assembly and vehicle

Abstract

The invention discloses a rear vehicle door side wall assembly and a vehicle, and the rear vehicle door side wall assembly comprises a side wall inner plate which 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 side of the side wall inner plate and the outer side of the rear wheel cover outer plate, a reinforcing cavity is defined between the C column reinforcing plate and the side wall inner plate and between the C column reinforcing plate and the rear wheel cover outer plate, and the C column reinforcing plate is provided with a lock catch installation point. According to the rear vehicle door side wall assembly, the C column reinforcing plate is additionally arranged to improve the local structural strength and reduce vibration generated during door closing, then the door closing sound is reduced, a reinforcing cavity is formed in the rear vehicle door side wall assembly to seal the sound, the effect of reducing the door closing sound is further improved, and the door closing sound quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle manufacturing, and in particular to a rear door side panel assembly and a vehicle having the rear door side panel assembly. Background Art

[0002] Vehicles have become a common means of transportation in people's daily lives, and the riding experience of passengers is also a matter of great concern. The sound of car door closing is mainly caused by the vibration of the door and side panel when the door lock and the lock buckle contact each other during the door closing process. The rear side panel of the rear door lock buckle of the car is a sheet metal cavity. When the lock and the lock buckle collide during the door closing process, the local sheet metal vibration is caused, and the vibration is quickly transmitted to the surrounding of the lock buckle, generating reflected sound in the center of the cavity of the side panel, which is instantly amplified. The quality of the door closing sound is poor, and there is room for improvement. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a rear door side panel assembly, which reduces the door closing sound by enhancing the structural strength to reduce the vibration generated when the lock and the lock catch collide, and at the same time, forms a reinforcement cavity to seal the sound, further improving the door closing sound reduction effect and improving the door closing sound quality.

[0004] According to an embodiment of the present invention, the rear door side panel assembly includes: a side panel inner panel, the side panel inner panel is provided with an installation through hole for installing a seat belt retractor; a rear wheel housing inner panel and a rear wheel housing outer panel, the rear wheel housing inner panel is connected to the inner side of the rear wheel housing outer panel, and the rear wheel housing inner panel is connected to the lower side of the side panel inner panel; a C-pillar reinforcement plate, the C-pillar reinforcement plate is connected to the outer sides of the side panel inner panel and the rear wheel housing outer panel, and a reinforcement cavity is defined between the side panel inner panel and the rear wheel housing outer panel, and the C-pillar reinforcement plate is provided with a lock mounting point.

[0005] According to the rear door side panel assembly of the embodiment of the present invention, a C-pillar reinforcement plate is added to improve the structural strength of the C-pillar, and the C-pillar reinforcement plate is connected to the side panel inner panel and the rear wheel housing outer panel, so as to further improve the local structural strength, reduce the vibration generated when closing the door, and thus reduce the door closing sound, and form a reinforced cavity inside to seal the sound, further improve the effect of reducing the door closing sound, and improve the quality of the door closing sound.

[0006] According to some embodiments of the present invention, the rear door side panel assembly further includes an interior panel assembly, which is located on the inner side of the side panel inner panel, and defines an internal sound absorbing cavity connected to the mounting through hole between the interior panel assembly and the side panel inner panel.

[0007] According to the rear door side panel assembly of some embodiments of the present invention, sound-absorbing cotton is provided in the internal sound-absorbing cavity.

[0008] According to some embodiments of the rear door side panel assembly of the present invention, 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-absorbing gap.

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

[0010] According to some embodiments of the present invention, the rear door side panel assembly further includes a side panel outer panel, the C-pillar reinforcement plate is located between the side panel outer panel and the side panel inner panel, and a sound-absorbing area is formed between the C-pillar reinforcement plate and the side panel outer panel.

[0011] According to some embodiments of the rear door side panel assembly of the present invention, the side panel outer panel 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 panel.

[0012] According to the rear door side panel assembly of some embodiments of the present invention, an overlapping surface is provided in the circumferential direction of the C-pillar reinforcement plate, and the overlapping surface is used to be fitted and connected with the side panel inner panel and the rear wheel housing outer panel.

[0013] According to the rear door side panel assembly of some embodiments of the present invention, the portion of the overlapping surface located in front of the C-pillar reinforcement plate is provided with the lock mounting point.

[0014] The invention also discloses a vehicle.

[0015] The vehicle according to the embodiment of the present invention is provided with any one of the above-mentioned rear door side panel assemblies.

[0016] The advantages of the vehicle and the above-mentioned rear door side panel assembly over the prior art are the same and will not be elaborated here.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of the installation position of a rear door side panel assembly on a vehicle according to an embodiment of the present invention;

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

[0024] Figure 6 Schematic diagram of the structure of the rear door side panel assembly according to an embodiment of the present invention Figure 3 ;

[0025] Figure 7 Schematic diagram of the structure of the rear door side panel assembly according to an embodiment of the present invention Figure 4 ;

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

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

[0028] Reference numerals:

[0029] Rear door side panel assembly 100,

[0030] Side enclosure inner panel 11, mounting hole 111, internal sound absorbing cavity 112, sound absorbing cotton 113, rear wheel housing inner panel 12, rear wheel housing 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 enclosure outer panel 16, side enclosure rear section 161, side enclosure front section 162, sound absorbing zone 163. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are 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 understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

[0035] Reference below Figure 1-Figure 9 A rear door side panel assembly 100 according to an embodiment of the present invention is described, in which a C-pillar reinforcement plate 14 is provided, and the C-pillar reinforcement plate 14 is connected to the side panel inner panel 11 and the rear wheel housing inner panel 12 to improve the structural strength, reduce the local vibration generated when closing the door, and thus reduce the door closing sound. At the same time, the sound generated when closing the door can be enclosed in the reinforcement cavity, further reducing the door closing sound.

[0036] like Figure 3 As shown, a rear door side panel assembly 100 according to an embodiment of the present invention includes: a side panel inner panel 11 , a rear wheel housing inner panel 12 , a rear wheel housing outer panel 13 and a C-pillar reinforcement panel 14 .

[0037] The side inner panel 11 is provided with a mounting hole 111 for mounting a seat belt retractor. The seat belt is an indispensable part of the vehicle interior and exists in the vehicle interior as an important component for protecting the safety of passengers. Figure 6As shown, a mounting hole 111 is provided on the side inner panel 11, and the mounting hole 111 is used to install a seat belt retractor. The mounting hole 111 is arranged at a position of the side inner panel 11 facing the interior of the vehicle to provide a mounting point for the seat belt retractor to ensure the installation of the seat belt, thereby ensuring the safety of the rear passengers.

[0038] The rear wheel housing inner panel 12 is connected to the inner side of the rear wheel housing outer panel 13, and the rear wheel housing inner panel 12 is connected to the lower side of the side panel inner panel 11. That is, the rear door side panel assembly 100 includes the rear wheel housing inner panel 12 and the rear wheel housing outer panel 13, both of which are arranged around the rear wheel and are partially bent toward the rear wheel, the rear wheel housing inner panel 12 is located on the side of the rear wheel housing outer panel 13 facing the inside of the vehicle body, and the rear wheel housing inner panel 12 and the side panel inner panel 11 are connected at the lower side of the side panel inner panel 11, that is, the side panel inner panel 11 and the rear wheel housing inner panel 12 are arranged up and down, and the connection between the two is used to improve the structural strength, reduce vibration, and thus reduce the door closing sound.

[0039] The C-pillar reinforcement plate 14 is connected to the outer side of the side inner plate 11 and the rear wheel housing outer plate 13, and defines a reinforcement cavity between the side inner plate 11 and the rear wheel housing outer plate 13. It can be understood that the C-pillar reinforcement plate 14 can enhance the structural strength of the C-pillar. The C-pillar reinforcement plate 14 is set on the side of the side inner plate 11 and the rear wheel housing outer plate 13 facing the outside of the vehicle, so that it defines a reinforcement cavity together with the side inner plate 11 and the rear wheel housing outer plate 13. The reinforcement cavity can seal the sound when the door closing sound is generated. At the same time, the C-pillar reinforcement plate 14 is provided with a lock mounting point 142, which provides an installation position for the lock of the rear door, so that the lock can be installed and the rear door can be closed and locked.

[0040] Specifically, the lock catch installation point 142 is set on the C-pillar reinforcement plate 14. During the closing process of the vehicle door, the door lock and the lock catch collide, and vibration is generated after the collision. The vibration can be dispersed through the C-pillar reinforcement plate 14, and does not directly act on the side inner panel 11 and the rear wheel housing outer panel 13. The noise generated by the vibration can be transmitted to the C-pillar reinforcement plate 14 and the reinforcement cavity in turn. After being dispersed and absorbed by the C-pillar reinforcement plate 14 and the reinforcement cavity, the amount of vibration transmitted to the side inner panel 11 and the rear wheel housing can be reduced. In other words, the vibration noise generated by the lock catch collision has been absorbed by the C-pillar reinforcement plate 14 and the reinforcement cavity before being transmitted to the reinforcement cavity, so that the vibration noise will not be reflected and amplified in the reinforcement cavity between the side inner panel 11 and the side outer panel 16, reducing the closing noise of the vehicle door, and enhancing the heavy feeling of closing the door when the lock catch contacts the C-pillar reinforcement plate 14 when the vehicle door is closed.

[0041] According to the rear door side panel assembly 100 of the embodiment of the present invention, a C-pillar reinforcement plate 14 is added to improve the structural strength of the C-pillar, and the C-pillar reinforcement plate 14 is connected to the side panel inner panel 11 and the rear wheel housing outer panel 13, so as to further improve the local structural strength, reduce the vibration generated when closing the door, and thus reduce the door closing sound, and form a reinforced cavity inside to seal the sound, further improve the effect of reducing the door closing sound, and improve the quality of the door closing sound.

[0042] In some embodiments, the rear door side panel assembly 100 further includes an interior panel assembly 15, which is located on the inner side of the side panel inner panel 11, and defines an internal sound absorbing cavity 112 in communication with the mounting through hole 111 between the interior panel assembly 15 and the side panel inner panel 11. By arranging the interior panel assembly 15 on the inner side of the side panel inner panel 11, the interior panel assembly 15 can shield the side panel inner panel 11 and the like from the inside of the vehicle, and can especially shield the mounting through hole 111, thereby preventing the side panel inner panel 11 and the like from being directly exposed to the inside of the vehicle in a large area, and the interior panel assembly 15 can be used to decorate the inside of the vehicle, thereby improving the interior appreciation.

[0043] At the same time, an internal sound absorbing cavity 112 is formed between the interior trim panel assembly 15 and the side inner panel 11. Fig. 9 As shown, 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 hole 111, that is, the sound will diffuse to the mounting hole 111, that is, when the door is closed, the lock vibration sound at the C-pillar reinforcement plate 14 can be transmitted to the reinforcement cavity, and diffused from the mounting 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, a sound-absorbing cotton 113 is provided in the internal sound-absorbing cavity 112. Thus, the sound-absorbing cotton 113 can absorb the sound transmitted to the internal sound-absorbing cavity 112, that is, it can absorb the sound generated when the door is closed, and further reduce the closing sound.

[0045] Specifically, a sound-absorbing cotton 113 is arranged in the internal sound-absorbing cavity 112, that is, the internal sound-absorbing cavity 112 diffuses the sound generated when the door is closed, effectively reducing the door closing sound. At the same time, the sound-absorbing ability of the sound-absorbing cotton 113 can be used to further absorb the sound, thereby enhancing the effect of reducing the door closing sound.

[0046] In some embodiments, the interior panel assembly 15 includes a first interior panel 151, a second interior panel 152, and a third interior panel 153. The first interior panel 151 and the second interior panel 152 are distributed on the inner side of the side inner panel 11, and the third interior panel 153 is located on the outer side of the second interior panel 152 and defines a sound-absorbing gap 154 ​​together. 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, and together define a sound-absorbing gap 154.

[0047] It can be understood that the sound-absorbing gap 154 ​​has the same function as the internal sound-absorbing cavity 112 , and both 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 absorption 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 absorption 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 are used to shield 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 poor 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 an installation groove 155 which is recessed away from the side inner panel 11 at a position directly opposite to the installation through hole 111, and a sound absorbing cotton 113 is arranged in the installation groove 155. Figure 7 and Fig. 9 As shown, the second interior trim panel 152 is formed with a mounting groove 155, and the mounting groove 155 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, and 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 absorption 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, if the sound-absorbing cotton 113 is set in the installation groove 155 of the second interior panel 152, the vibration noise can be absorbed.

[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 closing sound of the door.

[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. Figure 7-Figure 8 As shown, a C-pillar reinforcement plate 14 is provided between the side enclosure inner panel 11 and the side enclosure outer panel 16, and a sound-absorbing area 163 is formed between the C-pillar reinforcement plate 14 and the side enclosure 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 enclosure outer panel 16 includes a side enclosure front section 162 and a side enclosure rear section 161, the side enclosure front section 162 is connected to the front side of the side enclosure rear section 161, and the side enclosure front section 162 and the side enclosure rear section 161 are respectively connected to the side enclosure inner panel 11. Figure 4 As shown, the side panel front section 162 and the side panel rear section 161 are distributed sequentially along the front-to-back direction, and the side panel front section 162 is connected to the front area of ​​the side panel inner plate 11 , and the side panel rear section 161 is connected to the rear area of ​​the side panel inner plate 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 achieving vibration dispersion at the locking position and reducing the door closing sound.

[0057] In some embodiments, a lap joint surface 141 is provided on the circumference of the C-pillar reinforcement plate 14, and the lap joint surface 141 is used to be connected with the side inner panel 11 and the rear wheel housing outer panel 13. The C-pillar reinforcement plate 14 is connected with the side inner panel 11 and the rear wheel housing outer panel 13, and a lap joint surface 141 is provided on the C-pillar reinforcement plate 14, which is used to connect the C-pillar reinforcement plate 14 with the side inner panel 11 and the rear wheel housing outer panel 13, that is, the side inner panel 11 and the rear wheel housing outer panel 13 are both connected with the C-pillar reinforcement plate 14 at the lap joint surface 141, and can be connected by welding at the lap joint surface 141.

[0058] like Figure 5 As shown, overlapping surfaces 141 are formed at the circumferential edges of the C-pillar reinforcement plate 14, that is, the overlapping surfaces 141 can be annular flange surfaces, so that the C-pillar reinforcement plate 14 can be welded and fixed to the side inner panel 11 and the rear wheel cover outer panel 13 at various positions in the circumferential direction, so that the formed reinforcement cavity is formed into a circumferentially closed chamber, which is beneficial to achieve the sealing and absorption of vibration noise and enhance the noise reduction effect.

[0059] In some embodiments, the portion of the overlap surface 141 located on the front side of the C-pillar reinforcement plate 14 is provided with a lock mounting point 142. Figure 5 As shown, the overlap surface 141 is arranged on the C-pillar reinforcement plate 14, and the lock mounting point 142 is located at the position where the overlap surface 141 faces the front side of the vehicle body. The lock mounting point 142 is used to provide an installation position for the lock, and the lock mounting point 142 is arranged on the C-pillar reinforcement plate 14. When the lock and the lock collide, 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, reinforcing ribs are provided on the rear wheel housing outer panel 13 to reduce and absorb vibrations and prevent the door closing sound from being directly transmitted outward, thereby reducing the door closing sound and further enhancing the effect of attenuating the door closing sound.

[0061] The invention also discloses a vehicle.

[0062] According to the embodiment of the present invention, the vehicle includes a rear door side panel assembly 100 of any one of the above-mentioned embodiments, and a C-pillar reinforcement plate 14 is provided to connect the C-pillar reinforcement plate 14 with the side panel inner panel 11 and the rear wheel housing outer panel 13 to improve the structural strength, reduce the vibration generated when closing the door, and thus reduce the door closing sound. At the same time, a reinforcement cavity is formed in the rear door side panel assembly 100 to seal the sound, and a plurality of sound-absorbing cottons 113 are provided in the rear door side panel assembly 100 to absorb the sound, thereby further enhancing the effect of reducing the door closing sound and improving the door closing sound quality.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0064] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is 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 wheel housing inner panel and a rear wheel housing outer panel, wherein the rear wheel housing inner panel is connected to the inner side of the rear wheel housing outer panel, and the rear wheel housing inner panel is connected to the lower side of the side enclosure inner panel; A C-pillar reinforcement plate is connected to the outer sides of the side panel inner plate and the rear wheel housing outer plate, and defines a reinforcement cavity between the C-pillar reinforcement plate and the side panel inner plate and the rear wheel housing outer plate. The C-pillar reinforcement plate is provided with a locking mounting point.

2. The rear door side panel assembly according to claim 1, characterized in that: It also includes an interior trim panel assembly, which is located on the inner side of the side panel inner panel, and defines an internal sound absorbing cavity connected to the mounting through hole between the interior trim panel assembly and the side panel inner panel.

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

4. The rear door side panel assembly according to claim 2, characterized in that: 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 inner panel. The third interior panel is located on the inner side of the second interior panel and together define a sound-absorbing gap.

5. The rear door side panel assembly according to claim 4, characterized in that: The second interior trim panel is formed with an installation groove which is recessed away from the side inner panel at a position directly opposite to the installation through hole, and sound-absorbing cotton is arranged in the installation groove.

6. 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.

7. The rear door side panel assembly according to claim 6, characterized in that: The side enclosure outer panel comprises a side enclosure front section and a side enclosure rear section, the side enclosure front section is connected to the front side of the side enclosure rear section, and the side enclosure front section and the side enclosure rear section are respectively connected to the side enclosure inner panel.

8. 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.

9. The rear door side panel assembly according to claim 8, characterized in that: The portion of the overlapping surface located on the front side of the C-pillar reinforcement plate is provided with the lock mounting point.

10. A vehicle, characterized in that: A rear door side panel assembly according to any one of claims 1 to 9 is provided.

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