Electric vehicle seat cushion supporting structure

Abstract

The invention relates to the technical field of electric vehicle accessories, and provides an electric vehicle seat cushion supporting structure which comprises a seat cushion, a seat cask and a seat cask cover, and is characterized in that a bottom plate of the seat cushion comprises a bottom plate main body and a frame surrounding the periphery of the bottom plate main body, the edge part of the bottom plate main body is bent downwards to form a turnup, and a notch is formed in the turnup; the inner side part of the frame covers the turned-over edge and the notch and forms a plastic tenon inserted into the notch; the seat cask is installed in the seat cask cover, an end cover plate is arranged at the upper end of an annular gap between the seat cask and the seat cask cover, the inner side of the end cover plate is fixedly connected with the seat cask, the outer side of the end cover plate is bent to form a bent part, and the bent part forms a second annular groove with a downward opening. The ribs at the top of the seat cask housing are inserted into the annular groove and are arranged at intervals with the top wall of the annular groove; the bottom plate body and the end cover plate are sheet metal parts, the frame is a plastic part, and the damping strip is a rubber part. The defects in the prior art are overcome, the using amount of plastic parts is reduced, and the structural strength and reliability are guaranteed.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electric vehicle accessories, in particular to an electric vehicle seat cushion support structure. BACKGROUND

[0002] Due to the flammability of plastics, these materials can accelerate the spread of fire and release a large amount of toxic gas when a fire occurs, which is extremely easy to cause a vicious fire accident resulting in mass casualties. The new edition of the Electric Bicycle Safety Technical Specification clearly stipulates that the total mass of plastic parts used in an electric bicycle should not exceed 5.5% of the total mass of the vehicle. On the basis of traditional electric vehicles, vehicle enterprises increase the bottom plate main body or replace plastic parts with the bottom plate main body to reduce the total mass of plastic parts used.

[0003] During the research and development process, the applicant improved the electric bicycle seat support structure and proposed an electric vehicle seat cushion support structure. SUMMARY

[0004] In view of the deficiencies of the prior art, the application provides an electric vehicle seat cushion support structure to solve the above problems existing in the prior art while taking into account the reliability of the structure.

[0005] To achieve the above purpose, the application is implemented through the following technical solutions: An electric vehicle seat cushion support structure, comprising a seat cushion, a seat bucket and a seat bucket cover, characterized in that: The bottom plate of the seat cushion comprises a bottom plate main body and a frame wrapped around the outer periphery of the bottom plate main body, the edge part of the bottom plate main body is bent downward to form a first flange, and a plurality of spaced-apart notches are formed in the first flange, the inner side of the frame covers the first flange and the notches and is formed with a plastic tenon inserted into the notches, and a first groove is formed in the lower part of the frame, and a shock-absorbing strip is buckled in the first groove; The seat bucket is installed inside the seat bucket cover (specifically, the bottom of the seat bucket is supported on the two side beams of the electric vehicle frame), the upper end opening of the annular gap between the seat bucket and the seat bucket cover is sealed by an annular end cover plate, the inner side of the end cover plate is fixedly connected with the seat bucket, and the outer side is bent to form a curved part, the curved part forms a second annular groove with the opening facing downward, and a vertical support rib on the top of the seat bucket cover is inserted into the second annular groove and is arranged in spaced relation with the top wall of the second annular groove; The bottom plate main body and the end cover plate are sheet metal parts, the frame is a plastic part, and the shock-absorbing strip is a rubber part.

[0006] Further, the shock-absorbing strip comprises a hollow strip-shaped main body and locking barbs connected to the upper sides of the hollow strip-shaped main body, a plurality of pairs of spaced-apart flanges are arranged in the first groove, each pair of flanges is formed by being inwardly protruding from the two side walls of the first groove, and the locking barbs and the flanges are buckled.

[0007] Furthermore, the first flange is embedded in the inner wall of the first groove, and several of the notches are spaced apart and surround the sheet metal part circumferentially.

[0008] Furthermore, the notch includes a drainage section extending through the first flange to the base plate body and a gathering section formed at the junction of the base plate body and the first flange, the gathering section being connected to the drainage section and the width of the gathering section being greater than the width of the drainage section.

[0009] Preferably, the cross-section of the aggregation section is a rounded rectangle, and the two sides of the opening connecting the aggregation section and the drainage section are respectively provided with chamfers.

[0010] Furthermore, the lower end of the outer wall of the annular groove is connected to a downwardly extending stepped support portion.

[0011] Furthermore, reinforcing ribs are distributed above the stepped support portion and above the portion covering the first flange and the notch, respectively, on the frame.

[0012] Furthermore, the top of the seat bucket forms a second flange that extends horizontally outward and then bends downward. The second flange is provided with buckles that extend downward and are spaced apart. The edge of the end cover plate forms a third flange that bends downward and then extends horizontally outward. The third flange is provided with a through hole corresponding to the opening. The end cover plate is fitted over the seat bucket. The buckles are engaged with the lower end face of the third flange after passing through the hole. The upper end face of the third flange is abutted by the vertical part of the second flange.

[0013] This invention provides an electric vehicle seat support structure, which has the following beneficial effects: The first bend forms a "hook" structure. During injection molding, the molten plastic completely wraps around this downward bend. After cooling and solidification, the first bend is "locked" inside the plastic frame, allowing the joint to withstand greater pulling force, torque and shear force. The bent flange will more smoothly distribute the localized concentrated loads that may act on the plastic frame (such as the squeezing when installing buckles, lateral impacts) to a larger area of ​​the sheet metal body, avoiding stress concentration that may occur at the joint of straight edges, and greatly reducing the risk of plastic cracking from the edge when under stress. The bent flange increases the positioning stability of the sheet metal part in the mold. At the same time, the presence of the notch is equivalent to creating a series of mechanical stops on the flange. After injection molding, the plastic will fill these notches, forming "plastic tenons" that tightly interlock with the notches on the sheet metal, effectively resisting circumferential shear force and preventing relative movement between the two. Compared to a complete, closed flange, spaced notches can, to some extent, interrupt the internal stress generated by the plastic during cooling and shrinkage, preventing excessive stress concentration in a certain area and thus reducing the risk of cracking in plastic parts. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional structural diagram of the present invention; Figure 3 for Figure 2 A magnified structural diagram of point A in the middle; Figure 4 for Figure 2 A schematic diagram of the exploded structure; Figure 5 for Figure 4 A magnified structural diagram of section B in the middle; Figure 6 for Figure 4 A magnified structural diagram of section C in the middle; Figure 7 This is a cross-sectional schematic diagram of the joint between the seat bucket and the end cover plate in this invention; Figure 8 This is a schematic diagram of the structure of the present invention; Figure 9 This is a schematic diagram of the exploded structure of the present invention; Figure 10 for Figure 9 A magnified structural diagram of section D in the middle; Figure 11 This is a cross-sectional view of the plastic frame covering the first flange and notch in this invention.

[0015] In the picture: 1. Main body of the base plate; 11. First flanging; 12. Gap; 121. Drainage section; 122. Aggregation segment; 2. Border; 21. Covering part; 22. Covering tank; 3. Surface layer; 4. Shock-absorbing strips; 41. Hollow strip-shaped main body; 42. Lock the barbs; 5. End cover plate; 51. Bending section; 52. Third flanging; 521. Perforation; 6. Cover on the toilet seat; 61. Vertical support ribs; 6. Cover on the toilet seat; 7. Front cover of the toilet seat; 8-1, Right side strip; 8-2, Left side strip; 9. Seat bucket; 91. Second flip; 92. Buckle. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] See attached document Figures 1-11 An electric vehicle seat support structure includes a seat cushion, a seat bucket, and a seat bucket cover; The seat cushion includes a base plate and an inner filling layer and a surface layer 3 sequentially disposed on the base plate. The inner filling layer (generally silicone or sponge) is not shown in the figure. The base plate includes a base plate body 1 and a frame 2 fixed around the outer periphery of the base plate body 1. The edge of the base plate body 1 is bent downwards to form a first flange 11 with several spaced notches 12. The inner side of the frame 2 covers the first flange 11 and the notches 12, forming a plastic tenon for inserting into the notches 12. That is, the inner side of the frame 2 is a covering part 21, forming a covering groove 22 and a plastic tenon inside the groove (not shown in the figure). Figure 11 As shown in the figure, the structure is formed integrally with the two side walls of the covering groove 22, and the lower part of the frame 2 is provided with a first groove, and a shock-absorbing strip 4 is fastened in the first groove. The seat bucket 9 is installed inside the seat bucket cover (specifically, the bottom of the seat bucket 9 is supported on the side beams of the electric vehicle frame). The upper opening of the annular gap between the seat bucket 9 and the seat bucket cover is sealed by an annular end cover plate 5. The inner side of the end cover plate 5 is fixedly connected to the seat bucket 9, and its outer side is bent to form a bent part 51. The bent part 51 forms a second annular groove with the opening facing downward. The vertical support rib 61 at the top of the seat bucket cover is inserted into the second annular groove and spaced apart from the top wall of the second annular groove. The seat cover includes an upper seat cover 6 and a front seat cover 7. The rear ends of the left and right strips extend upward and fit against the two sides of the front seat cover 7. The upper seat cover 6 is detachably fixed above the front seat cover 7 and the upwardly extending portions of the left and right strips. The base plate body 1, end cover 5, left side strip 8-2, and right side strip 8-1 are sheet metal parts, the frame 2 and the front cover 7 of the seat bucket are plastic parts, and the shock-absorbing strip 4 is a rubber part.

[0018] The curved portion 51 of the end cover plate 5 forms an upward arch, which is located below the first groove of the frame 2. When the cushion falls, the arch will impact the first groove. In this embodiment, the first flange 11 is embedded in the inner wall of the first groove, which strengthens the inner wall of the first groove. At the same time, the buckle provided in the first groove is impacted immediately. Since the notches 12 are spaced apart and surround the sheet metal part, the spaced notches 12 can avoid excessive stress concentration at a certain point and improve the reliability of the structure.

[0019] In this embodiment, the shock-absorbing strip 4 includes a hollow strip-shaped body 41 and locking barbs 42 connected to the upper two sides of the hollow strip-shaped body 41. The first groove has several pairs of spaced-apart flanges, each pair of flanges protruding inwards from both sides of the first groove. The locking barbs 42 and the flanges engage. The hollow strip-shaped body 41 contacts and cushions the seat cushion when it falls, also providing some sound insulation.

[0020] In this embodiment, the notch 12 includes a flow-guiding section 121 extending through the first flange 11 towards the base plate body 1 and a gathering section 122 formed at the junction of the base plate body 1 and the first flange 11. The gathering section 122 communicates with the flow-guiding section 121, and the width of the gathering section 122 is greater than the width of the flow-guiding section 121. The cross-section of the gathering section 122 is a rounded rectangle. Chamfers are provided on both sides of the opening where the gathering section 122 communicates with the flow-guiding section 121. After the base plate body 1 is stamped and flanged, the bent root where the first flange 11 connects to the base plate body 1 is the area with the most concentrated stress, and it is also the place where the plastic part is most likely to crack when it cools and shrinks. After the plastic solidifies, a larger plastic tenon is formed, which reinforces the weakest area. It changes the force transmission path and disperses the stress to the entire strong plastic tenon. In addition, the molten plastic flows smoothly from the narrow flow-guiding section 121 to the spacious gathering section 122, which can better expel air and avoid air entrapment.

[0021] In this embodiment, the lower end of the outer wall of the annular groove of the frame 2 is connected to a downwardly extending stepped support. Reinforcing ribs are distributed above the stepped support and above the portion covering the first flange 11 and the notch 12. This structure allows for thinning and reducing the mass of the frame 2, while the reinforcing ribs strengthen it, preventing deformation and ensuring structural stability and reliability.

[0022] In this embodiment, the top of the seat bucket forms a second flange 91 that extends horizontally outward and then bends downward. The second flange 91 has downwardly extending and spaced-apart buckles 92. The edge of the end cover plate 5 forms a third flange 52 that bends downward and then extends horizontally outward. The third flange has a through hole 521 corresponding to the opening. The end cover plate 5 is fitted over the seat bucket. The buckles 92, after passing through the holes 521, engage with the lower end face of the third flange 52. The upper end face of the third flange 52 is abutted by the vertical portion of the second flange 91. This structure facilitates the quick installation of the end cover plate 5 and the seat bucket, as well as the quick installation of the seat bucket after installing the end cover plate 5.

[0023] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0024] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric vehicle seat support structure, comprising a seat cushion, a seat bucket, and a seat bucket cover, characterized in that: The base plate of the cushion includes a base plate body and a frame that surrounds the outer periphery of the base plate body. The edge of the base plate body is bent downward to form a first flange and has several spaced notches. The inner side of the frame covers the first flange and notches and forms a plastic tenon for inserting into the notch. The lower part of the frame has a first groove, and a shock-absorbing strip is fastened in the first groove. The seat bucket is installed inside the seat bucket cover. The upper opening of the annular gap between the seat bucket and the seat bucket cover is sealed by an annular end cover. The inner side of the end cover is fixedly connected to the seat bucket, and its outer side is bent to form a curved part. The curved part forms a second annular groove with the opening facing downward. The vertical support ribs at the top of the seat bucket cover are inserted into the second annular groove and spaced apart from the top wall of the second annular groove. The base plate and end cover are sheet metal parts, the frame is a plastic part, and the shock-absorbing strip is a rubber part.

2. The electric vehicle seat support structure as described in claim 1, characterized in that: The shock-absorbing strip includes a hollow strip-shaped body and locking barbs connected to the upper two sides of the hollow strip-shaped body. The first groove is provided with several pairs of spaced flanges, each pair of flanges protruding inward from the two side walls of the first groove, and the locking barbs and flanges are engaged.

3. The electric vehicle seat support structure as described in claim 1, characterized in that: The first flange is embedded in the inner wall of the first groove, and several of the notches are spaced apart and surround the sheet metal part in a circumferential manner.

4. The electric vehicle seat support structure as described in claim 3, characterized in that: The notch includes a drainage section extending through the first flange to the base plate body and a gathering section formed at the junction of the base plate body and the first flange. The gathering section is connected to the drainage section and the width of the gathering section is greater than the width of the drainage section.

5. The electric vehicle seat support structure as described in claim 4, characterized in that: The cross-section of the aggregation section is a rounded rectangle, and the openings on both sides of the aggregation section and the drainage section are chamfered.

6. The electric vehicle seat support structure as described in claim 1, characterized in that: The frame is connected to a downwardly extending stepped support at the lower end of the outer wall of the annular groove.

7. The electric vehicle seat support structure as described in claim 1, characterized in that: The frame is provided with reinforcing ribs above the stepped support and above the part covering the first flange and the notch.

8. The electric vehicle seat support structure as described in claim 1, characterized in that: The top of the seat bucket forms a second flange that extends horizontally outward and then bends downward. The second flange is provided with buckles that extend downward and are spaced apart. The edge of the end cover plate forms a third flange that bends downward and then extends horizontally outward. The third flange is provided with a through hole corresponding to the opening. The end cover plate is fitted over the seat bucket. The buckles are fastened to the lower end face of the third flange after passing through the hole. The upper end face of the third flange is abutted by the vertical part of the second flange.

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