Bottom guard plate pre-fixing structure and automobile
By setting limiting ribs on the bottom guard of the car to restrict the movement of the tongue, the problem of inconsistent surface difference matching between the tongue and the bumper is solved, abnormal noise is avoided, and production costs are reduced.
Patent Information
- Application Number
- CN202421967259.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-05-23
- Estimated Expiration
- 2034-08-13
AI Technical Summary
In the existing pre-fixed structure of the bottom guard plate of the automobile, the matching consistency between the surface difference between the tongue and the bumper is poor, resulting in abnormal noise problems. The solution of setting up blankets to limit positions is not ideal.
The limiting ribs are provided on the plate body of the bottom guard plate. The limiting ribs are at least partially protruded from the end surface of the plate body, and the movement of the tongue through the hanging interface is restricted to prevent the tongue from colliding with the bumper.
By setting limiting ribs, abnormal noises are avoided when colliding with the tongue plate and the bumper, and the surface difference matching consistency between the bottom guard plate and the bumper is improved, the step of setting up blankets is eliminated, and production costs are reduced.
Smart Images
Figure CN222891968U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of automobile manufacturing, and in particular to an underbody guard plate pre-fixing structure and an automobile. Background Art
[0002] In the related art, in order to facilitate the installation of the underbody guard of the car, tongues are provided on some underbody guards. During the installation of the underbody guard, the tongue is first passed through the hanging interface on the bumper to prevent the underbody guard from falling off, and then the underbody guard is fixed.
[0003] Since the tongue and the hanging interface are only used for pre-fixing the bottom guard plate, the tongue inserted into the hanging interface has a small amount of moving space in the hanging interface. In order to avoid abnormal noise caused by the collision between the tongue and the bumper, felt is usually sandwiched between the tongue and the bumper for limiting.
[0004] However, the felt solution provided results in a less consistent surface matching between the underbody guard and the bumper. Utility Model Content
[0005] In view of this, the embodiments of the present application hope to provide a bottom guard plate pre-fixing structure and a car that can not only avoid the tongue from colliding with the bumper and producing abnormal noise, but also improve the consistency of the surface difference matching between the bottom guard plate and the bumper.
[0006] To achieve the above-mentioned purpose, an embodiment of the present application provides a bottom guard plate pre-fixing structure, including:
[0007] A bumper with a hanging interface;
[0008] The bottom guard plate includes a plate body, a tongue piece and a limiting rib, the plate body having a first end surface on one side along a first direction, the tongue piece and the limiting rib being arranged on the plate body, and the limiting rib at least partially protruding from the first end surface; when the tongue piece is in a state of being passed through the hanging interface so that the bottom guard plate is hung on the bumper, the portion of the limiting rib protruding from the first end surface faces the bumper to constrain the movement of the tongue piece in the first direction.
[0009] In one embodiment, when the tongue piece is in the hooked state, a gap is formed between the limiting rib and the bumper in the first direction.
[0010] In one embodiment, when the tongue is in the hooked state, the bumper is spaced apart from the first end face in the first direction, and a partial projection of the bumper on a projection plane perpendicular to the first direction overlaps with a projection of the first end face.
[0011] In one embodiment, the bumper has a flange, and when the tongue is in the hanging state, the flange is spaced from the first end face in the first direction, and at least a partial projection of the flange on the projection plane overlaps with the projection of the first end face, and the portion of the limiting rib protruding from the first end face faces the flange.
[0012] In one embodiment, the bumper includes a main body, and the hanging interface is arranged at one of the main body and the flange; the flange includes a connecting portion and a folding portion, the connecting portion is connected to the main body and is bent toward one side of the main body, and the folding portion is arranged on a side of the connecting portion away from the main body, and is bent in a direction away from the main body; when the tongue is in the hanging state, the folding portion is spaced from the first end face in the first direction, and at least a partial projection of the folding portion on the projection plane overlaps with the projection of the first end face, and the portion of the limiting rib protruding from the first end face faces the folding portion.
[0013] In one embodiment, the hanging port is arranged on the flange and at least passes through the connecting portion of the flange.
[0014] In one embodiment, along the insertion direction of the tongue piece into the hanging port, the limiting rib is located at the rear side of the tongue piece.
[0015] In one embodiment, there are multiple limiting ribs, and the multiple limiting ribs are distributed on two opposite sides of the tongue piece along the second direction, wherein the second direction is perpendicular to the first direction and parallel to the first end face.
[0016] In one embodiment, the limiting rib includes a limiting body, and the limiting body includes a supporting portion and two first reinforcing portions, wherein the two first reinforcing portions are respectively located on opposite sides of the supporting portion and together with the supporting portion, form a groove.
[0017] In one embodiment, the limiting rib further includes a second reinforcing portion, which is disposed in the groove and is respectively connected to the plate body and the supporting portion.
[0018] In one embodiment, the plate body has a rib protruding from the first end surface, and the limiting rib is arranged on the first end surface and connected to the rib.
[0019] In one embodiment, the limiting rib and the plate body are an integrally formed structure.
[0020] Another embodiment of the present application provides a car, including: the above-mentioned bottom guard plate pre-fixing structure.
[0021] The embodiments of the present application provide a bottom guard plate pre-fixing structure and a car. The bottom guard plate pre-fixing structure can constrain the tongue of the bottom guard plate passing through the hanging interface in a first direction by setting limiting ribs on the plate body of the bottom guard plate. Therefore, there is no need to set a felt between the tongue and the bumper, which can better prevent the tongue from colliding with the bumper and generating abnormal noise. At the same time, by setting the limiting ribs, the bottom guard plate and the bumper can be more closely fitted, which is beneficial to improving the consistency of the surface difference matching between the bottom guard plate and the bumper. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] Figure 1 A schematic diagram of a partial structure of a bottom guard plate pre-fixing structure according to an embodiment of the present application;
[0023] Figure 2 for Figure 1 Schematic diagram of the cross section at AA in the middle;
[0024] Figure 3 for Figure 1 Schematic diagram of the cross section at BB;
[0025] Figure 4 for Figure 1 A schematic diagram of the partial structure of the bottom guard plate is shown.
[0026] Description of Reference Numerals
[0027] 100, bottom guard plate pre-fixing structure, 10, bumper; 10a, hanging interface; 11, flange; 111, connecting part; 112, folding part; 12, main body; 20, bottom guard plate; 21, plate body; 21a, first end face; 21b, second end face; 21c, retaining edge; 22, tongue; 23, limiting rib; 23a, gap; 231, limiting body; 231a, groove; 2311, supporting part; 2312, first reinforcement part; 232, second reinforcement part. DETAILED DESCRIPTION
[0028] In the description of the embodiments of the present application, it should be noted that the orientation or position relationship indicated by the term "first direction" or the like is based on the attached Figure 2 The directions or positional relationships shown in the figure, and the directions or positional relationships indicated by “insertion direction”, etc. are based on the attached Figure 3 The directions or positional relationships shown in the figure, and the directions or positional relationships indicated by the “second direction” and the like are based on the attached Figure 4 The orientation terms showing the orientation or positional relationship are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.
[0029] The present application embodiment provides a car, see Figures 1 to 4 The automobile includes an underbody guard plate pre-fixing structure 100 .
[0030] See also Figures 1 to 4 The bottom guard plate pre-fixing structure 100 of the embodiment of the present application includes a bumper 10 and a bottom guard plate 20 .
[0031] The bumper 10 has a hanging hole 10a. The bottom guard plate 20 includes a plate body 21, a tongue piece 22 and a limiting rib 23. The plate body 21 has a first end surface 21a on one side along the first direction. The tongue piece 22 and the limiting rib 23 are arranged on the plate body 21, and the limiting rib 23 at least partially protrudes from the first end surface 21a. When the tongue piece 22 is in a hanging state where it is inserted into the hanging hole 10a so that the bottom guard plate 20 is hung on the bumper 10, the portion of the limiting rib 23 protruding from the first end surface 21a faces the bumper 10 to restrict the movement of the tongue piece 22 in the first direction.
[0032] Specifically, the bumper 10 described in the present application may be a front bumper 10 of a car, or may be a rear bumper 10 of a car.
[0033] The materials of the bumper 10 and the bottom guard plate 20 are not limited. For example, the material of the bumper 10 can be one of metal and plastic or a combination of two, and the material of the bottom guard plate 20 can be one of metal, plastic and resin or a combination of at least two.
[0034] Figures 2 to 4 All parts of the limiting rib 23 shown in the figure protrude from the first end surface 21a. In other embodiments, only part of the limiting rib 23 may protrude from the first end surface 21a. For example, see Figure 2 The plate body 21 has a second end face 21b on one side away from the first end face 21a along the first direction. The limiting rib 23 can be passed through the plate body 21, and a part of the limiting rib 23 protrudes from the first end face 21a, and another part of the limiting rib 23 protrudes from the second end face 21b.
[0035] Figures 2 to 4 The limiting rib 23 shown is arranged on the first end face 21a. In other embodiments, the limiting rib 23 can also be arranged on other parts of the plate body 21. For example, the plate body 21 has a side wall surface located between the first end face 21a and the second end face 21b, and the limiting rib 23 can be arranged on the side wall surface.
[0036] The tongue 22 is passed through the hanging interface 10a so that the bottom guard plate 20 can be hung on the bumper 10 for the purpose of pre-fixing the bottom guard plate 20. The pre-fixed bottom guard plate 20 also needs to be fixed to the bumper 10 and / or other structures of the automobile by welding, fastening connection (fastening connection refers to connection with fasteners such as screws and bolts), etc.
[0037] The number of the limiting ribs 23 can be one or more.
[0038] For example, Figure 4 The bottom guard plate pre-fixing structure 100 shown is provided with two limiting ribs 23 .
[0039] The portion of the limiting rib 23 protruding from the first end surface 21a faces the bumper 10 to constrain the movement of the tongue 22 in the first direction. This means that when the tongue 22 is in a hanging state, the limiting rib 23 can limit the movement of the tongue 22 along the first direction, so that the tongue 22 can have a small amount of movement stroke in the first direction, but the movement stroke is not enough to cause the tongue 22 to collide with the bumper 10 and produce an abnormal sound, or the tongue 22 cannot move along the first direction.
[0040] For example, see Figure 2 When the tongue piece 22 is in the hanging state, the limiting rib 23 and the bumper 10 can form a gap 23a in the first direction. The spacing D of the gap 23a along the first direction can be adjusted according to design requirements. For example, the spacing D of the gap 23a along the first direction can be 0.3mm-0.6mm (including end values), for example, the spacing D can be 0.3mm, 0.4mm, 0.5mm, 0.6mm, etc. Preferably, the spacing D can be 0.5mm.
[0041] The spacing of the gap 23a along the first direction is equivalent to the movement stroke of the tongue piece 22 in the first direction. When the bottom guard plate 20 shakes in the first direction, the limiting rib 23 abuts against the bumper 10 to limit the movement of the tongue piece 22 in the first direction. In addition, the provision of the gap 23a can also better prevent the limiting rib 23 from interfering with the bumper 10 during the process of the tongue piece 22 being inserted into the hanging port 10a.
[0042] In other embodiments, when the tongue piece 22 is in the hooked state, the limiting rib 23 may also be in contact with the bumper 10 , that is, the tongue piece 22 cannot move along the first direction.
[0043] The bottom guard plate pre-fixing structure 100 of the embodiment of the present application can constrain the tongue 22 of the bottom guard plate 20 inserted into the hanging interface 10a in the first direction by setting a limiting rib 23 on the plate body 21 of the bottom guard plate 20. Therefore, there is no need to set a felt between the tongue 22 and the bumper 10, and the effect of preventing the tongue 22 from colliding with the bumper 10 and generating abnormal noise can be better played. At the same time, by setting the limiting rib 23, the bottom guard plate 20 and the bumper 10 can also be more closely fitted, which is beneficial to improve the consistency of the surface difference matching between the bottom guard plate 20 and the bumper 10.
[0044] In addition, the bottom guard plate pre-fixing structure 100 eliminates the production process of setting the felt. At the same time, compared with the material cost of the felt, the material cost of the limiting rib 23 is relatively low. Therefore, the use of the bottom guard plate pre-fixing structure 100 of the embodiment of the present application can also effectively reduce production costs.
[0045] In one embodiment, the limiting ribs 23 and the plate body 21 may be an integrally formed structure, that is, the integrally formed structure means that the limiting ribs 23 and the plate body 21 are formed into an inseparable integral structure through an integrally formed processing technology.
[0046] Exemplarily, the limiting ribs 23 and the plate body 21 may be formed into an integrally formed structure by injection molding.
[0047] The limiting ribs 23 and the plate body 21 are formed in an integral structure, which not only facilitates the processing and manufacturing of the limiting ribs 23, but also can further reduce the production cost.
[0048] In one embodiment, please refer to Figure 4 The limiting rib 23 includes a limiting body 231 , and the limiting body 231 includes a supporting portion 2311 and two first reinforcing portions 2312 . The two first reinforcing portions 2312 are respectively located at opposite sides of the supporting portion 2311 , and together with the supporting portion 2311 , form a groove 231 a .
[0049] Figure 4 The support portion 2311 and the two first reinforcement portions 2312 of the limiting body 231 shown extend along the first direction, that is, the support portion 2311 and the two first reinforcement portions 2312 are connected to the plate body 21 , and the support portion 2311 and the two first reinforcement portions 2312 face the bumper 10 .
[0050] In other embodiments, the two first reinforcement portions 2312 may be connected to the plate body 21, and the support portion 2311 may be located on the side of the two first reinforcement portions 2312 away from the plate body 21, that is, the support portion 2311 faces the bumper 10. Alternatively, the support portion 2311 may be connected to the plate body 21, and the two first reinforcement portions 2312 may be located on the side of the support portion 2311 away from the plate body 21, that is, the two first reinforcement portions 2312 face the bumper 10.
[0051] By providing the support portion 2311 and the two first reinforcement portions 2312 , the limiting body 231 can have a relatively simple overall structure with high structural strength, thereby saving production costs and better preventing the limiting rib 23 from deforming in unexpected situations.
[0052] Please continue reading Figure 4The limiting rib 23 may also be provided with a second reinforcing portion 232 , which is disposed in the groove 231 a and is respectively connected to the plate body 21 and the supporting portion 2311 .
[0053] The number of the second reinforcing portion 232 may be one or more.
[0054] The second reinforcing portion 232 can further strengthen the limiting body 231 , thereby further improving the overall structural strength of the limiting rib 23 .
[0055] It should be noted that the limiting rib 23 is not limited to the structural form described in the above embodiment, and the specific structure of the limiting rib 23 can be adjusted according to design needs, as long as it can restrain the movement of the tongue 22 in the first direction.
[0056] In one embodiment, please refer to Figure 4 The plate body 21 may be provided with a retaining edge 21c protruding from the first end surface 21a, and the limiting rib 23 is provided on the first end surface 21a and connected to the retaining edge 21c.
[0057] This arrangement can improve the connection strength between the limiting rib 23 and the plate body 21, so as to better prevent the limiting rib 23 from falling off from the plate body 21 in an accidental situation.
[0058] In one embodiment, please refer to Figure 1 and Figure 2 When the tongue 22 is in the hanging state, the bumper 10 can be spaced apart from the first end face 21a in the first direction, and a partial projection of the bumper 10 on the projection plane perpendicular to the first direction overlaps with the projection of the first end face 21a, that is, on the projection plane perpendicular to the first direction, the projection of a partial area of the bumper 10 overlaps with the projection of the first end face 21a, and at the same time, the area where the projection of the bumper 10 overlaps with the projection of the first end face 21a is located on the side of the first end face 21a away from the second end face 21b, and is spaced apart from the first end face 21a.
[0059] The portion of the limiting rib 23 protruding from the first end surface 21a may face the area where the bumper 10 and the first end surface 21a are spaced in the first direction and the projections overlap, or may face the area where the projections of the bumper 10 and the first end surface 21a are staggered.
[0060] When the tongue 22 is in the hanging state, a partial area of the bumper 10 is spaced from the first end face 21a in the first direction, and a partial projection of the bumper 10 on a projection plane perpendicular to the first direction overlaps with the projection of the first end face 21a, which can facilitate the setting of the limiting rib 23 on the plate body 21.
[0061] For example, see Figures 1 to 3 , the bumper 10 may be provided with a flange 11, and when the tongue piece 22 is in the hanging state, the flange 11 is spaced from the first end face 21a in the first direction, and at least a portion of the projection of the flange 11 on the projection plane overlaps with the projection of the first end face 21a, and the portion of the limiting rib 23 protruding from the first end face 21a may face the flange 11. In other words, the limiting rib 23 may face the flange 11 to restrict the movement of the tongue piece 22 in the first direction.
[0062] If a partial area of the flange 11 is offset from the first end face 21a, then, depending on the different setting positions of the limiting rib 23, the limiting rib 23 can be oriented toward the area where the flange 11 and the first end face 21a are spaced in the first direction and whose projections overlap, or it can be oriented toward the area where the projection of the flange 11 is offset from the projection of the first end face 21a.
[0063] The structure of the flange 11 is not limited, for example, please refer to Figure 2 and Figure 3 The bumper 10 includes a main body 12, and the flange 11 may include a connecting portion 111 and a folding portion 112. The connecting portion 111 is connected to the main body 12 and is bent toward one side of the main body 12. The folding portion 112 is arranged on a side of the connecting portion 111 away from the main body 12 and is bent in a direction away from the main body 12. When the tongue 22 is in a hanging state, the folding portion 112 is spaced apart from the first end face 21a in the first direction, and at least a portion of the projection of the folding portion 112 on the projection plane overlaps with the projection of the first end face 21a, and the portion of the limiting rib 23 protruding from the first end face 21a may face the folding portion 112.
[0064] Figure 2 and Figure 3 The limiting rib 23 shown is oriented toward the region where the folding portion 112 and the first end face 21a are spaced apart in the first direction and their projections overlap. In other embodiments, if a portion of the folding portion 112 is offset from the first end face 21a, the limiting rib 23 may also be oriented toward the region where the projection of the folding portion 112 is offset from the projection of the first end face 21a.
[0065] In other embodiments, when the tongue 22 is in the hanging state, the bumper 10 may also be staggered from the first end face 21a, that is, there is no overlapping area between the projection of the bumper 10 and the projection of the first end face 21a, and the limiting rib 23 may be arranged on the side wall surface of the plate body 21, or a part of the limiting rib 23 may extend to the outside of the side wall surface, so that the portion of the limiting rib 23 protruding from the first end face 21a can face the bumper 10.
[0066] In addition, the hanging hole 10a can be provided on the flange 11. For example, the hanging hole 10a can at least penetrate the connecting portion 111 of the flange 11. For example, Figure 3 The hanging hole 10 a shown penetrates both the connecting portion 111 and the folding portion 112 of the flange 11 . In other embodiments, the hanging hole 10 a may only penetrate the connecting portion 111 but not the folding portion 112 .
[0067] The hanging port 10a at least passes through the connecting portion 111 of the flange 11, so that the flange 11 can be used to pass the tongue piece 22 and cooperate with the limiting rib 23, thereby simplifying the structure of the bumper 10 and improving the convenience of processing and manufacturing the bumper 10.
[0068] In some other embodiments, the hanging opening 10 a may not be disposed on the flange 11 . For example, the hanging opening 10 a may also be disposed on the main body 12 .
[0069] In one embodiment, please refer to Figure 3 and Figure 4 Along the insertion direction of the tongue piece 22 into the hanging interface 10a, the limiting rib 23 can be located at the rear side of the tongue piece 22, that is, the setting position of the limiting rib 23 can be as close to the tongue piece 22 as possible to ensure that the limiting rib 23 can have a better restraining effect on the tongue piece 22. At the same time, the limiting rib 23 is located at the rear side of the tongue piece 22 along the insertion direction, and will not affect the insertion of the tongue piece 22 into the hanging interface 10a.
[0070] Please continue reading Figure 3 and Figure 4 For the bottom guard plate pre-fixing structure 100 having a plurality of limiting ribs 23, the plurality of limiting ribs 23 may be distributed on two opposite sides of the tongue piece 22 along the second direction, wherein the second direction is perpendicular to the first direction and parallel to the first end surface 21a. In other words, at least one limiting rib 23 may be provided on each of the two opposite sides of the tongue piece 22 along the second direction, so that the limiting ribs 23 can play a better restraining role.
[0071] In the description of the present application, the description with reference to the terms "in one embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. 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 embodiments of the present application. In the present application, 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 a suitable manner in any one or more embodiments or examples. In addition, those skilled in the art may combine the different embodiments or examples described in the present application and the features of the different embodiments or examples without contradiction.
[0072] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application are included in the protection scope of the present application.
Claims
1. A bottom guard plate pre-fixing structure, characterized in that: include: A bumper with a hanging interface; The bottom guard plate includes a plate body, a tongue piece and a limiting rib, the plate body having a first end surface on one side along a first direction, the tongue piece and the limiting rib being arranged on the plate body, and the limiting rib at least partially protruding from the first end surface; when the tongue piece is in a state of being passed through the hanging interface so that the bottom guard plate is hung on the bumper, the portion of the limiting rib protruding from the first end surface faces the bumper to constrain the movement of the tongue piece in the first direction.
2. The bottom guard plate pre-fixing structure according to claim 1, characterized in that: When the tongue piece is in the hooked state, a gap is formed between the limiting rib and the bumper in the first direction.
3. The bottom guard plate pre-fixing structure according to claim 1 or 2, characterized in that: When the tongue is in the hooked state, the bumper is spaced apart from the first end surface in the first direction, and a partial projection of the bumper on a projection plane perpendicular to the first direction overlaps with a projection of the first end surface.
4. The bottom guard plate pre-fixing structure according to claim 3, characterized in that: The bumper has a flange, and when the tongue is in the hanging state, the flange is spaced from the first end face in the first direction, and at least part of the projection of the flange on the projection plane overlaps with the projection of the first end face, and the portion of the limiting rib protruding from the first end face faces the flange.
5. The bottom guard plate pre-fixing structure according to claim 4, characterized in that: The bumper includes a main body, and the hanging interface is arranged at one of the main body and the flange; the flange includes a connecting portion and a folding portion, the connecting portion is connected to the main body and is bent toward one side of the main body, and the folding portion is arranged on a side of the connecting portion away from the main body, and is bent in a direction away from the main body; when the tongue is in the hanging state, the folding portion is spaced from the first end face in the first direction, and at least a partial projection of the folding portion on the projection plane overlaps with the projection of the first end face, and the portion of the limiting rib protruding from the first end face faces the folding portion.
6. The bottom guard plate pre-fixing structure according to claim 5, characterized in that: The hanging interface is arranged on the flange and at least passes through the connecting portion of the flange.
7. The bottom guard plate pre-fixing structure according to claim 1 or 2, characterized in that: Along the insertion direction of the tongue piece into the hanging port, the limiting rib is located at the rear side of the tongue piece.
8. The bottom guard plate pre-fixing structure according to claim 7, characterized in that: There are multiple limiting ribs, and the multiple limiting ribs are distributed on two opposite sides of the tongue piece along the second direction, wherein the second direction is perpendicular to the first direction and parallel to the first end surface.
9. The bottom guard plate pre-fixing structure according to claim 1 or 2, characterized in that: The limiting rib comprises a limiting body, and the limiting body comprises a supporting portion and two first reinforcing portions, wherein the two first reinforcing portions are respectively located at two opposite sides of the supporting portion and together with the supporting portion form a groove.
10. The bottom guard plate pre-fixing structure according to claim 9, characterized in that: The limiting rib further includes a second reinforcing portion, which is disposed in the groove and is respectively connected to the plate body and the supporting portion.
11. The bottom guard plate pre-fixing structure according to claim 1 or 2, characterized in that: The plate body has a retaining edge protruding from the first end surface, and the limiting rib is arranged on the first end surface and connected to the retaining edge.
12. The bottom guard plate pre-fixing structure according to claim 1 or 2, characterized in that: The limiting rib and the plate body are an integrally formed structure.
13. A car, characterized in that: include: The bottom guard plate pre-fixing structure as described in any one of claims 1-12.