Electric vehicle trunk floor shell
By designing the boss and cover structure of the bottom shell of the electric vehicle tail box, the problem of manually cleaning water droplets inside the tail box was solved, achieving automatic drainage and keeping it dry, and improving the strength and ease of disassembly of the cover.
Patent Information
- Application Number
- CN202522389414.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-11
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-11-11
AI Technical Summary
Water droplets inside the tailgate of an electric vehicle need to be cleaned manually at regular intervals, which can lead to corrosion and dampness, affecting the safety and dryness of stored items.
Design an electric vehicle tail box bottom shell, including a boss and a cover structure. The boss is provided with a liquid collection chamber and a liquid drainage groove. The cover is inserted into the boss. The water in the liquid collection chamber is discharged through the liquid drainage groove. The cover is provided with a liquid guiding rib and a lifting part for easy disassembly.
It enables automatic drainage of water from the tailgate, keeping it dry, preventing corrosion, and improving the strength and ease of disassembly of the cover.
Smart Images

Figure CN224676277U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric vehicle components, and in particular to a bottom shell of an electric vehicle tail box. Background Technology
[0002] The tail box of an electric vehicle is located at the rear of the vehicle and has a storage function, used to store items such as raincoats and chargers.
[0003] After use, raincoats will have water droplets on their surface. When the raincoat is placed in the trunk, the water droplets will flow to the bottom of the trunk. This water needs to be cleaned manually and regularly, otherwise it will corrode the metal connection between the trunk and the electric vehicle. At the same time, if this water is not cleaned in time, the internal environment of the trunk will become damp, making stored items prone to mold. However, manual cleaning is inconvenient. Therefore, it is necessary to design a structure for the bottom shell of the trunk that can automatically drain water, so that the water accumulated at the bottom of the trunk can be automatically drained out. Utility Model Content
[0004] This application provides a bottom shell for an electric vehicle tailgate, which can effectively drain liquid from the tailgate and keep the tailgate dry.
[0005] The technical solution for the bottom shell of an electric vehicle tail box provided in this application is as follows: An electric vehicle tail box bottom shell includes a bottom shell body. The bottom wall of the bottom shell body protrudes into its cavity to form a boss. The boss has multiple mounting screw holes. An annular liquid collection cavity is formed between the boss and the circumferential inner wall of the bottom shell body. The cavity wall of the liquid collection cavity has multiple drainage grooves distributed around the boss. A baffle is provided on the boss and is fastened to the boss. The baffle has a first connecting part and a second connecting part on the boss. The first connecting part and the second connecting part are interlocked.
[0006] By adopting the above technical solution, when a raincoat with water stains is placed in the trunk, the water on the raincoat will flow to the bottom of the main body of the bottom shell due to gravity, that is, into the liquid collection chamber. The water flowing into the liquid collection chamber will flow out of the main body of the bottom shell through multiple drainage channels. A baffle is set to prevent water droplets from falling onto the boss, thereby preventing water from corroding the bolts installed in the mounting screw holes.
[0007] Preferably, the first connecting part includes multiple inserts disposed on the cover, and the second connecting part includes multiple slots formed on the boss.
[0008] By adopting the above technical solution, it is convenient to disassemble and assemble the cover.
[0009] Preferably, the baffle is bowl-shaped, with the middle of the baffle higher than its edge, and the edge of the baffle having a protruding boss that extends into the liquid collection cavity.
[0010] By adopting the above technical solution, the water dripping onto the baffle can flow into the collection chamber.
[0011] Preferably, the baffle is provided with multiple liquid guiding ribs, which are arranged at equal intervals on the baffle, and the two ends of the multiple liquid guiding ribs extend into the drainage chamber respectively.
[0012] By adopting the above technical solution, water is guided to flow more easily into the liquid collection chamber, while the strength of the baffle is improved.
[0013] Preferably, the edge of the baffle extending into the liquid collection cavity is integrally formed with a lifting part, and a space for fingers to be inserted is formed between the lifting part and the bottom wall of the bottom shell body.
[0014] By adopting the above technical solution, it is convenient to disassemble the cover. When disassembling the cover, put your finger on the lifting part and then pull the cover forcefully to release the engagement between the insert and the slot.
[0015] Preferably, the baffle is provided with multiple support columns, which are located between the baffle and the boss and abut against the boss.
[0016] By adopting the above technical solution, the strength of the cover is improved, preventing objects stored in the trunk from breaking the cover when the electric vehicle bounces up and down during operation.
[0017] Preferably, the outer wall of the boss is provided with multiple reinforcing ribs, which intersect to form a grid structure, and the end faces of the multiple reinforcing ribs away from the boss are flush with the bottom surface of the bottom shell body.
[0018] By adopting the above technical solution, the strength of the bottom shell body is improved, and the bottom shell body can be placed stably.
[0019] The main technical effects of this utility model are reflected in the following aspects: 1. The design of this utility model is a confluence structure that collects water into the liquid collection chamber, so that the water can be discharged efficiently; 2. This utility model designs the edge of the baffle to extend into the liquid collection chamber, so that water can flow directly into the liquid collection chamber. At the same time, it designs a lifting part to facilitate the removal of the baffle. 3. This utility model is equipped with multiple support columns to enhance the strength of the cover and prevent objects stored in the tail box from breaking the cover when the electric vehicle is bumping up and down during operation. Attached Figure Description
[0020] Figure 1 This is a structural diagram of the bottom shell of the tailgate.
[0021] Figure 2 This is a schematic diagram of the bottom shell body.
[0022] Figure 3 This is a structural schematic diagram of the bottom shell body from another angle.
[0023] Figure 4 yes Figure 1 A sectional view of the bottom shell of the middle tail box along line AA.
[0024] Figure 5 yes Figure 4 A magnified view of a section at point B in the middle.
[0025] Figure 6 This is a schematic diagram of the shield structure.
[0026] Figure 7 This is a schematic diagram showing the structure of the shield from another angle.
[0027] Reference numerals: 1. Bottom shell body; 2. Boss; 21. Mounting screw hole; 22. Reinforcing rib; 3. Liquid collection chamber; 31. Drainage groove; 4. Baffle; 41. Liquid guiding rib; 42. Lifting part; 43. Support column; 5. First connecting part; 51. Insert block; 6. Second connecting part; 61. Slot. Detailed Implementation
[0028] The present application will be further described in detail below with reference to the accompanying drawings, so that the technical solution of the present application can be more easily understood and mastered.
[0029] Reference Figures 1-3 This embodiment of an electric vehicle tail box bottom housing includes a bottom housing body 1. The bottom wall of the bottom housing body 1 protrudes into its cavity to form a boss 2, and the boss 2 has multiple mounting screw holes 21. The outer wall of the boss 2 is provided with multiple reinforcing ribs 22, which intersect to form a grid structure. The end faces of the multiple reinforcing ribs 22 away from the boss 2 are flush with the bottom surface of the bottom housing body 1, so that the bottom housing body 1 is placed stably.
[0030] Reference Figure 1 , Figure 2 , Figures 4-7 An annular liquid collecting cavity 3 is formed between the boss 2 and the circumferential inner wall of the bottom shell body 1. Multiple drainage grooves 31 are formed on the cavity wall of the liquid collecting cavity 3, distributed around the periphery of the boss 2. A baffle 4 is provided above the boss 2, located inside the bottom shell body 1 and fastened to the boss 2. The baffle 4 has a first connecting part 5, which consists of two insert blocks 51. A second connecting part 6 is provided on the boss 2, which consists of two slots 61. The first connecting part 5 and the second connecting part 6 are interlocked.
[0031] Reference Figures 4-7The baffle 4 is bowl-shaped, with its center higher than its edge. The edge of the baffle 4 protrudes from the boss 2 and extends into the liquid collection chamber 3. A lifting part 42 is integrally formed at the edge of the baffle 4 extending into the liquid collection chamber 3, creating a space between the lifting part 42 and the bottom wall of the base body 1 for fingers to insert. The extension of the edge of the baffle 4 into the liquid collection chamber 3 allows water dripping onto the baffle 4 to flow into the liquid collection chamber 3. The lifting part 42 facilitates the removal of the baffle 4; to remove the baffle 4, fingers are hooked onto the lifting part 42, and then the baffle 4 is pulled forcefully to disengage the insert 51 from the slot 61.
[0032] Reference Figures 4-7 Meanwhile, the baffle 4 is provided with multiple liquid guiding ribs 41, which are equidistantly distributed on the baffle 4, and the two ends of the multiple liquid guiding ribs 41 extend into the drainage chamber. The liquid guiding ribs 41 guide the water to flow more easily into the liquid collection chamber 3, and at the same time enhance the strength of the baffle 4.
[0033] Reference Figures 4-7 The cover 4 is equipped with multiple support columns 43, which are located between the cover 4 and the boss 2 and abut against the boss 2. The support columns 43 provide support to the boss 2, thereby increasing the strength of the cover and preventing objects stored in the tail box from breaking the cover 4 when the electric vehicle is bumped up and down during operation.
[0034] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.
Claims
1. A bottom shell for an electric vehicle tail box, comprising a bottom shell body (1), characterized in that: The bottom wall of the bottom shell body (1) protrudes into its cavity to form a boss (2). The boss (2) has multiple mounting screw holes (21). An annular liquid collection cavity (3) is formed between the boss (2) and the circumferential inner wall of the bottom shell body (1). The wall of the liquid collection cavity (3) has multiple drainage grooves (31). The multiple drainage grooves (31) are distributed on the periphery of the boss (2). The boss (2) is provided with a baffle (4). The baffle (4) is fastened to the boss (2). The baffle (4) is provided with a first connecting part (5). The boss (2) is provided with a second connecting part (6). The first connecting part (5) and the second connecting part (6) are interlocked.
2. The electric vehicle tail box bottom shell according to claim 1, characterized in that: The first connecting part (5) includes multiple inserts (51) disposed on the cover (4), and the second connecting part (6) includes multiple slots (61) formed on the boss (2).
3. The electric vehicle tail box bottom shell according to claim 1, characterized in that: The baffle (4) is bowl-shaped, with the middle part of the baffle (4) being higher than its edge, and the edge of the baffle (4) protruding from the boss (2) and extending into the liquid collection cavity (3).
4. The electric vehicle tail box bottom shell according to claim 3, characterized in that: The baffle (4) is provided with multiple liquid guiding ribs (41), which are arranged at equal intervals on the baffle (4), and the two ends of the multiple liquid guiding ribs (41) extend into the drain cavity respectively.
5. The electric vehicle tail box bottom shell according to claim 3, characterized in that: The baffle (4) has an integrally formed lifting part (42) at the edge of the liquid collection cavity (3), and a space for fingers to be inserted is formed between the lifting part (42) and the bottom wall of the bottom shell body (1).
6. The electric vehicle tail box bottom shell according to claim 4, characterized in that: The cover (4) is provided with multiple support columns (43), which are located between the cover (4) and the boss (2) and abut against the boss (2).
7. The electric vehicle tail box bottom shell according to claim 1, characterized in that: The outer wall of the boss (2) is provided with multiple reinforcing ribs (22), which intersect to form a grid structure. The end faces of the multiple reinforcing ribs (22) away from the boss (2) are flush with the bottom surface of the bottom shell body (1).