Electric car running tail door

Abstract

The utility model discloses an electric car running tail door which comprises an inner plate and an outer plate, the surface of the inner plate comprises an inner connecting area, the surface of the outer plate comprises an outer connecting area, the inner connecting area and the outer connecting area are arranged oppositely and are in clearance fit, and the inner connecting area and the outer connecting area are welded in a vibration friction mode. According to the electric car running tail door, the inner plate and the outer plate are tightly connected through vibration friction welding, the connecting strength of the inner plate and the outer plate is guaranteed, glue bonding is not needed, environment friendliness is achieved, rapid forming can be achieved, the production efficiency is improved, the connecting strength is guaranteed, the production cost is reduced, and meanwhile the product quality is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, especially to an electric sedan tail door. BACKGROUND

[0002] As a highlight of modern automobile design, the electric sedan tail door not only improves the appearance grade and sense of technology of the vehicle, but also greatly facilitates the daily use of the owner. With the continuous development of intelligent technology, the function of the electric sedan tail door is gradually enriched and perfected, bringing consumers a convenient and safe driving experience.

[0003] In the prior art, Chinese patent documents with publication numbers CN105711106A, CN112158057A, CN205853849U, CN210149129U, CN213261912U and CN214295516U disclose various automobile tail door structures. These automobile tail doors all include an inner plate and an outer plate, which are connected into one body through adhesive curing bonding, thereby forming a glued tail door.

[0004] In the production process of the above-mentioned glued tail door, the adhesive needs to be fully dried before it can be completely used, so the connection process is relatively time-consuming, which reduces the production efficiency. Moreover, the adhesive connection is easily affected by environmental temperature and humidity, resulting in unstable curing time. In particular, in high-temperature, humid or impacted environments, the adhesive force of the adhesive will decrease, causing the connection failure of the inner plate and the outer plate. Furthermore, although the adhesive can adapt to the connection of inner plates and outer plates of different sizes and shapes, the connection surface structure load of the inner plate and the outer plate causes uneven adhesive attachment, resulting in differences in connection strength at different parts of the connection surface of the inner plate and the outer plate, which further affects the connection strength and quality of the automobile tail door product. In addition, the adhesive produces irritating odor and other harmful emissions during use, which harms the surrounding environment and the health of the operators. Moreover, in the long run, the production of a large number of automobile tail doors requires a large amount of adhesive, which must be processed after production. With the increase of the number of post-maintenance, the overall production cost of the tail door will inevitably increase.

[0005] Therefore, it is necessary to improve the electric sedan tail door in the prior art. UTILITY MODEL CONTENT

[0006] The utility model aims at overcoming the defects in the prior art and providing an electric sedan tail door that improves production efficiency and connection strength, guarantees product quality, is environmentally friendly and reduces production cost.

[0007] To achieve the above technical effects, the technical scheme of the utility model is as follows: an electric sedan tail door, comprising:

[0008] The inner plate has a surface comprising an inner connecting area, and the outer plate has a surface comprising an outer connecting area, the inner connecting area and the outer connecting area are arranged opposite to each other and fit with a gap, and the inner connecting area and the outer connecting area are vibration friction welded.

[0009] Preferably, in order to ensure the gap fit of the inner connecting area and the outer connecting area during production, a welding boss is arranged between the inner connecting area and the outer connecting area, and the welding boss is densely arranged on the inner plate and / or the outer plate.

[0010] Preferably, in order to facilitate processing and molding and improve production efficiency, the welding boss is integrally formed on the inner plate and / or the outer plate.

[0011] Preferably, in order to facilitate the rapid melting of the welding boss to connect the inner plate and the outer plate, the outer diameter of the welding boss is 1.5mm-2.5mm.

[0012] Preferably, in order to ensure that the outer connecting area and the inner connecting area can be closely attached together after welding and improve the connection quality of the inner plate and the outer plate, the height of the welding boss is 1.5mm-2.5mm.

[0013] Preferably, in order to ensure that the outer connecting area and the inner connecting area can be closely attached together after welding and improve the connection quality of the inner plate and the outer plate, the inner connecting area and the outer connecting area are both provided with a plurality of and one-to-one correspondence, and the distance between adjacent welding bosses in the same inner connecting area and / or the same outer connecting area is 4mm-6mm.

[0014] Preferably, in order to improve the quality of the tailgate product, the inner plate is a PP-LGF40 plate, and the outer plate is a PP EPDM-T30 plate.

[0015] Preferably, in order to facilitate vibration friction welding between the inner plate and the outer plate, the welding boss is integrally formed on the inner plate, and the top surface of the welding boss is parallel to the plane where the corresponding inner connecting area is located.

[0016] Preferably, in order to reduce the gap at the edge of the inner plate and the outer plate, the outer connecting area comprises an outer surrounding area, and the outer surrounding area is adjacent to the circumferential outer edge of the outer plate.

[0017] Preferably, in order to increase the contact area of the inner plate and the outer plate, increase the connection strength of the inner plate and the outer plate, and improve the product quality, the projection of the outer surrounding area on the horizontal plane is a closed loop.

[0018] In conclusion, the electric car tail door of the utility model compared with prior art, through vibration friction welding connects the inner plate and the outer plate closely, guarantees the connecting strength of both, need not use the adhesive bonding, not only environmental protection, but also can quick forming, improves the production efficiency, and guarantees the connecting strength, reduces the production cost while improving the product quality. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is the structural schematic diagram of the electric car tail door of the utility model;

[0020] Figure 2 is Figure 1 the exploded schematic view;

[0021] Figure 3 is Figure 1 the exploded schematic view of another perspective;

[0022] Figure 4 is the structural schematic diagram of the inner plate of the electric car tail door of the utility model;

[0023] Figure 5 is Figure 4 the enlarged view of A of;

[0024] Figure 6 is Figure 4 the enlarged view of B of;

[0025] Figure 7 is Figure 4 the top view;

[0026] In the drawing: 1, inner plate;11, inner connecting area;111, inner surrounding area;112, inner center area;2, outer plate;21, outer connecting area;211, outer surrounding area;212, outer center area;3, welding boss. DETAILED DESCRIPTION

[0027] The specific embodiments of the utility model are further described below in combination with the drawings and examples. The following examples are only used to more clearly illustrate the technical scheme of the utility model, and cannot limit the protection scope of the utility model.

[0028] As Figures 1-7 shown, the electric car tail door of the utility model comprises:

[0029] The inner plate 1 and the outer plate 2, the surface of the inner plate 1 includes the inner connecting area 11, the surface of the outer plate 2 includes the outer connecting area 21, the inner connecting area 11 and the outer connecting area 21 are oppositely arranged and gap fit, and the inner connecting area 11 and the outer connecting area 21 are vibration friction welded.

[0030] In the electric car tailgate, the inner plate 1 and the outer plate 2 adopt the connection mode of vibration friction welding, so that the inner connecting area 11 of the inner plate 1 and the outer connecting area 21 of the outer plate 2 are tightly attached together. Specifically, the inner plate 1 and the outer plate 2 are both thermoplastic plastic plates, and during the production of the tailgate, by applying pressure between the two workpieces of the inner plate 1 and the outer plate 2, the inner connecting area 11 and the outer connecting area 21 are arranged opposite and adjacent, and then the high-frequency vibration (usually 200-240Hz) is used to make the inner plate 1 and the outer plate 2 move relatively, and after friction generates heat, the inner connecting area 11 and the outer connecting area 21 reach a molten state, and when the set welding depth is reached, the vibration stops, and the molten material cools and solidifies under pressure to form a strong welded joint, ensuring the connection strength of the inner plate 1 and the outer plate 2.

[0031] Compared with the traditional method of bonding the inner plate 1 and the outer plate 2 to form the tailgate by using glue, the utility model adopts the vibration friction welding method:

[0032] I. The welding speed is very fast, and there is no need to wait for the glue to solidify, and the welding can usually be completed within a few seconds, which is mainly due to the friction force generated by the high-frequency vibration friction welding, which makes the surface of the inner plate 1 and the outer plate 2 rapidly heat up and fuse, without the need for preheating time, thus greatly improving the production efficiency;

[0033] II. The high temperature generated during the welding process can partially melt the surface material of the inner connecting area 11 and the outer connecting area 21, forming a pressure-resistant welded joint close to the strength of the base material, the strength of the welded joint after welding is high, and it can withstand a large pressure and impact, ensuring the structural strength and safety of the automobile tailgate;

[0034] III. It can realize micron-level welding precision, so that the strength of the welded part is uniform, and there is almost no heat-affected zone, effectively avoiding the problems of deformation or cracks caused by thermal stress;

[0035] IV. It is a non-thermal source welding technology, and almost no harmful substances are generated during the welding process, so the working environment is cleaner and safer, which meets the green and sustainable development trend of modern manufacturing industry, is beneficial to protect the health of employees and protect the ecological environment;

[0036] V. No other materials are needed, and the connection is stable, the maintenance frequency is low, and the production cost after long-term use can be significantly reduced;

[0037] VI. It can quickly adapt to the connection of inner plates 1 and outer plates 2 of different sizes and shapes, so it is suitable for large-scale production and batch manufacturing of automobile tailgates, and the connection strength of the inner connecting area 11 and the outer connecting area 21 is uniform, ensuring the forming quality of the final product.

[0038] Further improvement is that welding convex columns 3 are arranged between the inner connecting area 11 and the outer connecting area 21, and densely arranged on the inner plate 1 and / or the outer plate 2.

[0039] Specifically, the welding convex columns 3 are uniformly and densely arranged between the inner connecting area 11 and the outer connecting area 21, and are melted after generating heat by friction, thereby forming multiple stable welds to tightly connect the inner connecting area 11 of the inner plate 1 and the outer connecting area 21 of the outer plate 2.

[0040] Further improvement is that the welding convex columns 3 are integrally formed on the inner plate 1 and / or the outer plate 2.

[0041] With the design, the structure is simplified, and only the inner plate 1 and the outer plate 2 need to be produced. After the two plates are butted, the welding convex columns 3 are automatically densely arranged between the inner connecting area 11 and the outer connecting area 21, facilitating the pressing of the inner plate 1 and the outer plate 2. Through the high-frequency friction heat generation, the vibration welding of the inner plate 1 and the outer plate 2 is realized.

[0042] Further improvement is that the outer diameter of the welding convex column 3 is 1.5-2.5 mm, the height of the welding convex column 3 is 1.5-2.5 mm, the inner connecting area 11 and the outer connecting area 21 are each provided with multiple and one-to-one corresponding welding convex columns 3, and the distance between adjacent welding convex columns 3 in the same inner connecting area 11 and / or the same outer connecting area 21 is 4-6 mm.

[0043] Specifically, the outer diameter of the welding convex column 3 is 2 mm, the height is 2 mm, and the distance between adjacent welding convex columns 3 is 5 mm.

[0044] If the outer diameter and height of the welding convex column 3 are too small and the distance is too large, the amount of adhesive material after melting of the welding convex column 3 will be too small, affecting the connection strength of the inner plate 1 and the outer plate 2. If the outer diameter and height of the welding convex column 3 are too large and the distance is too small, the excess welding convex column 3 material will melt during the vibration welding process, causing the molten material to overflow, which needs to be cleaned later, increasing the later processing cost. Therefore, in order to reduce the later processing cost and reduce the amount of production material, the outer diameter of the welding convex column 3 is selected to be 2 mm, the height is 2 mm, and the distance between adjacent welding convex columns 3 is 5 mm, while ensuring the welding connection strength.

[0045] Further improvement is that the inner plate 1 is a PP-LGF40 plate, and the outer plate 2 is a PP EPDM-T30 plate.

[0046] The inner plate 1 is an important structural component of the tailgate and plays a decisive role in the rigidity of the tailgate, providing the necessary structural support to enable it to withstand various loads in daily use. The PP-LGF40 is a 40% glass fiber reinforced polypropylene material with high strength and rigidity, capable of withstanding various loads in daily use, including impact force when opening and closing the door and vibration during driving, ensuring the stability and safety of the tailgate structure while also having the characteristics of lightweight. Compared to traditional metal materials, the density of PP-LGF40 is smaller, which helps to reduce the weight of the car tailgate and improve the fuel efficiency and endurance of the electric sedan. In addition, PP-LGF40 also has good processing performance and can be easily processed into the required shape and size through injection molding and other process methods, thereby helping to reduce costs and improve production efficiency.

[0047] The main function of the outer plate 2 is to meet the modeling requirements of the surface, making the appearance of the tailgate consistent with the style of the whole vehicle and improving the overall aesthetics of the vehicle. Since the outer plate 2 is directly exposed to the external environment, it needs to have good weather resistance to resist the influence of ultraviolet rays, rain, snow and other harsh weather conditions, maintain the appearance and normal function, and PP EPDM-T30 is a 30% modified polypropylene material with the addition of ethylene-propylene rubber and talc. This material has excellent comprehensive performance, including good weather resistance, impact resistance and wear resistance, and also has good formability, easy to process into the required complex shape and size, while its surface quality is excellent, thereby meeting the high requirements of electric sedan tailgate for appearance quality.

[0048] Further improvement is that the welding protrusion 3 is integrally formed on the inner plate 1, and the top surface of the welding protrusion 3 is parallel to the plane where the corresponding inner connecting area 11 is located.

[0049] Compared to PP EPDM-T30 material, PP-LGF40 material is more easily adopted by vibration friction welding, so the welding protrusion 3 is integrally formed on the inner plate 1, that is, the material of the welding protrusion 3 is also PP-LGF40, which facilitates the welding protrusion 3 to melt after heating due to high-frequency friction, tightly connecting the inner connecting area 11 and the outer connecting area 21 together. The top surface of the welding protrusion 3 is parallel to the plane where the corresponding inner connecting area 11 is located, ensuring that the inner connecting area 11 can be in full contact with the top surface of the welding protrusion 3 during welding, thereby increasing the contact area and further increasing the contact area of the material after melting of the inner connecting area 11 and the welding protrusion 3, strengthening the connection strength of the inner plate 1 and the outer plate 2 and improving the quality of the tailgate product.

[0050] Further improvement is that the outer connecting area 21 includes an outer surrounding area 211, which is in close proximity to the circumferential outer edge of the outer plate 2; the projection of the outer surrounding area 211 on the horizontal plane is in the shape of a closed loop.

[0051] The outer connecting area 21 further comprises an outer central area 212 between the outer surrounding areas 211, and the inner connecting area 11 comprises a plurality of inner surrounding areas 111 and an inner central area 112 between the inner surrounding areas 111.

[0052] The inner surrounding areas 111 are opposite to the outer surrounding areas 211, and the inner central area 212 is opposite to the outer central area 112. By arranging the plurality of outer connecting areas 21 and the inner connecting area 11, the contact area during welding of the inner plate 1 and the outer plate 2 is increased, the connecting strength is ensured, meanwhile, the outer surrounding areas 211 are adjacent to the circumferential outer edge of the outer plate 2, the gap between the edge of the outer plate 2 and the inner plate 1 after welding is reduced, the close connection is ensured, the edge gap between the outer plate 2 and the inner plate 1 is reduced, and the connecting quality of the inner plate 1 and the outer plate 2 is improved.

[0053] The above description is only preferred embodiments of the present application, and it should be pointed out that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. An electrically powered liftgate, characterized by, The utility model relates to a kind of inner plate and outer plate, the surface of the inner plate includes inner connecting area, the surface of the outer plate includes outer connecting area, the inner connecting area is arranged opposite with the outer connecting area and gap cooperation, the inner connecting area is vibrated friction welding with the outer connecting area. Welding boss is arranged between the inner connecting area and the outer connecting area, and the welding boss is densely arranged on the inner plate and / or the outer plate.

2. The power liftgate of claim 1, wherein: The welding boss is integrally formed on the inner plate and / or the outer plate.

3. The power liftgate of claim 2, wherein: The outer diameter of the welding boss is 1.5mm-2.5mm.

4. The power liftgate tailgate of claim 2, wherein: The height of the welding boss is 1.5mm-2.5mm.

5. The power liftgate tailgate of claim 2, wherein: The inner connecting area and the outer connecting area are both provided with multiple and one-to-one correspondence, and the spacing between adjacent welding bosses in the same inner connecting area and / or the same outer connecting area is 4mm-6mm.

6. The power liftgate tailgate of claim 2, wherein: The inner plate is PP-LGF40 plate, and the outer plate is PP EPDM-T30 plate.

7. The power liftgate tailgate of claim 6, wherein: The welding boss is integrally formed on the inner plate, and the top surface of the welding boss is parallel to the plane where the corresponding inner connecting area is located.

8. The power liftgate tailgate of claim 7, wherein: The outer connecting area includes outer surrounding area, and the outer surrounding area is adjacent to the circumferential outer edge of the outer plate.

9. The power liftgate of any of claims 1-8, wherein: The projection of the outer surrounding area on the horizontal plane is a closed loop.

10. The power liftgate tailgate of claim 9, wherein: ​

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