Battery tray lifting lug connection structure and connection method thereof

Abstract

This invention relates to the field of battery trays, and more particularly to a battery tray lifting lug connection structure and its connection method. Specifically, it discloses a battery tray lifting lug connection structure, comprising: a tray frame and a lifting lug sleeve. A through mounting groove is formed on one end face of the tray frame, and the lifting lug sleeve is interference-fitted into the mounting groove. An adhesive layer is filled between the contact surfaces of the lifting lug sleeve and the tray frame. Unlike welding in the prior art, this application uses an interference fit for fixing, followed by adhesive bonding for reinforcement. This eliminates the need for welding during processing, avoiding defects associated with welding and facilitating application in industrial production lines. The assembly process design does not require consideration of the impact of material parameters on welding, improving production efficiency and resulting in a smoother and more aesthetically pleasing product surface.

Description

Technical Field

[0001] This invention relates to the field of battery trays, and more particularly to a battery tray lifting lug connection structure and its connection method. Background Technology

[0002] New energy vehicles refer to a type of vehicle that uses unconventional automotive materials as its power source. With the promotion and continuous development of new energy vehicles, green and environmentally friendly electric vehicles have become the future development trend. For electric vehicles, battery safety protection is the most important aspect of the design. Under the new economic conditions of green environmental protection, lightweight and high-strength battery tray profiles are widely used. A battery tray typically consists of two parts: a housing for installing and protecting the battery, and a tray frame for connecting to the vehicle body. The battery tray, as the carrier of the battery cells and related electrical components, is installed to the vehicle body through the tray frame, supporting the entire battery pack while ensuring strength. The tray frame is used to fix the battery to the vehicle body, and lifting lugs are usually provided on the tray frame to meet installation and connection requirements.

[0003] In existing designs, the lifting lugs and tray frames are usually processed separately, and then the lifting lugs are fixed to the tray frame by welding. This processing method can lead to processing defects such as undercut and black weld at the welding position. The welding quality and appearance can vary greatly depending on the processing technology and the skill level of the operator. Moreover, this separate processing and welding method has low production efficiency. Therefore, it is necessary to design a brand-new battery tray lifting lug connection structure and connection method. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides the following technical solution: The battery tray lifting lug connection structure includes: tray frame and lifting lug sleeve.

[0005] Specifically, a through mounting groove is provided on one end face of the pallet frame, and a lifting lug sleeve is interference-fitted into the mounting groove. The contact surface between the lifting lug sleeve and the pallet frame is filled with an adhesive layer.

[0006] As an improvement to the above technical solution, the adhesive overflow width of the adhesive layer is less than 4mm, and the bonding gap between the lifting lug sleeve and the contact surface of the tray frame is within 0.5mm.

[0007] As an improvement to the above technical solution, the tray frame includes an integrally formed frame one and a frame two, which are arranged in an L-shape, and the mounting groove is formed on the surface of the frame two.

[0008] As an improvement to the above technical solution, the first frame has a through slot 1 inside, and the second frame has two sets of through slots 2 inside, one above the other, with reinforcing ribs inside the slots 2.

[0009] As an improvement to the above technical solution, the surface of the second frame is provided with a through slot, which is used for a positioning element that passes through the inside of the lifting lug sleeve.

[0010] As an improvement to the above technical solution, the lifting lug sleeve includes a lifting lug flange, a mating part for interference connection, and a guide part. The mating part is integrally formed below the lifting lug flange, and the guide part is located at the end of the mating part away from the lifting lug flange.

[0011] As an improvement to the above technical solution, a through groove is provided at the center of the lifting lug flange, the mating part, the guide part, and on the side of the pallet frame where the lifting lug sleeve is installed. The through groove is used to install positioning components.

[0012] As an improvement to the above technical solution, the interference amount of the interference region of the mating part is 0.5mm-0.2mm.

[0013] The connection method for the battery tray lifting lug connection structure, applied to the battery tray lifting lug connection structure as described in the aforementioned technical solution, includes the following steps: Apply an adhesive layer to the end face of the lifting lug flange near the pallet frame; The mating parts are pressed into the mounting groove by a press-fitting machine using a cold pressing method to complete the installation of the connection structure.

[0014] As an improvement to the above technical solution, the press-fitting machine needs to control the overflow width of the adhesive at the contact surface between the lifting lug flange and the pallet frame to be less than 4mm and the bonding gap to be within 0.5mm during operation.

[0015] The beneficial effects of this invention are: Unlike welding in existing technologies, this application uses an interference fit for fixing, followed by reinforcement with adhesive bonding. This eliminates the need for welding during processing, avoiding defects associated with welding and facilitating application in industrial production lines. Assembly process design does not require consideration of material parameters affecting welding, thus improving production efficiency and resulting in a smoother, more aesthetically pleasing product surface. While maintaining overall strength, it also exhibits strong stability and consistency. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the present invention after the lifting lug sleeve has been removed; Figure 3 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 4 This is a top view of the structure of the present invention; Figure 5 This is a front view structural diagram of the present invention.

[0017] Reference numerals: 10, pallet frame; 11, frame one; 111, slot one; 12, frame two; 121, mounting slot; 122, slot two; 123, reinforcing rib; 20, lifting lug sleeve; 21, lifting lug flange; 22, mating part; 23, guide part; 24, through slot; 30, adhesive layer. Detailed Implementation

[0018] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0019] In existing designs, the lifting lugs and pallet frames are usually processed separately, and then the lifting lugs are fixed to the pallet frame by welding. This processing method can lead to processing defects such as undercut and black weld at the welding position. The welding quality and appearance can vary greatly depending on the processing technology and the skill level of the operator. Moreover, this separate processing and welding method has low production efficiency.

[0020] To resolve the above problems, the following implementation example is provided: Example 1

[0021] Please see Figures 1 to 5 The battery tray lifting lug connection structure is provided, including: tray frame 10 and lifting lug sleeve 20.

[0022] Specifically, a through mounting groove 121 is provided on one end face of the pallet frame 10, and a lifting lug sleeve 20 is interference-fitted into the mounting groove 121. An adhesive layer 30 is filled between the contact surface of the lifting lug sleeve 20 and the pallet frame 10.

[0023] The end of the lifting lug sleeve 20 is pressed into the mounting groove 121 by an interference fit. Then, the contact surface between the lifting lug sleeve 20 and the pallet frame 10 is filled with adhesive layer 30, and the two are bonded and fixed by adhesive layer 30. Since the overall structure adopts a prefabricated design, subsequent installation does not require welding or other time-consuming processing. It can be more flexible and has higher assembly efficiency while ensuring structural stability.

[0024] In one embodiment, see Figure 5 The glue overflow width of the adhesive layer 30 is less than 4mm, and the bonding gap between the contact surface of the lifting lug sleeve 20 and the pallet frame 10 is within 0.5mm.

[0025] During the construction process, it is necessary to avoid excessive glue overflow. This is because the overflowing glue forms an irregular cured layer, which may affect the later cleaning and surface appearance. Limiting the glue overflow range to within 4mm can avoid these problems. Setting the bonding gap to 0.5mm is to avoid excessive gaps between workpieces. Excessive gaps may reduce the bonding strength at the bonding position, thereby affecting the overall strength of the workpiece.

[0026] In one embodiment, see Figure 1 The tray frame 10 includes an integrally formed frame 11 and frame 2 12, which are arranged in an L-shape, and the mounting groove 121 is opened on the surface of frame 2 12.

[0027] The L-shaped pallet frame 10 is formed by frame 11 and frame 2 12, thus fitting the edge of the pallet. The structural design of the pallet frame 10 given in this embodiment is only a limitation on the cross-sectional state. Depending on the design of the pallet's structural components, the pallet frame 10 may not be as shown. Figure 1 The straight panel shown, for example, one with an obtuse angle in the middle, is typically a panel 11 that is fixed to the perimeter of the battery tray, while the other panel 12 is used to connect to the vehicle body. Please refer to the diagram for the structure of the other panel 12. Figures 1 to 3 The details are as follows: The interior of frame 11 has a through slot 111, and the interior of frame 2 has two sets of through slots 122, one above the other. Reinforcing ribs 123 are provided inside slots 122.

[0028] By creating slot 111 and slot 22, the strength and stability of the structural components can be guaranteed while reducing the amount of material used in the entire pallet frame 10. Then, the two slots 222 inside the frame 212 are reinforced with reinforcing ribs 123 to ensure the strength of the structural components and prevent bending caused by excessive cavity.

[0029] In this embodiment, the slot 111 is composed of multiple spaced cavities to form a grid-like structure, which reduces the weight of the structural components as much as possible while ensuring the overall strength of the structural components.

[0030] For frame 2 (12), it is also necessary to ensure that the positioning component can be inserted normally. Therefore, a through slot needs to be made on the surface of frame 2 (12) for the positioning component to pass through from inside the lifting lug sleeve 20. For the positioning component, in the installation of the pallet, through bolts without positioning components can usually be used for fixing by means of threads.

[0031] In one embodiment, see Figures 3 to 5 Specifically, the lifting lug sleeve 20 includes a lifting lug flange 21, a mating part 22 for interference connection, and a guide part 23. The mating part 22 is integrally formed below the lifting lug flange 21, and the guide part 23 is disposed at the end of the mating part 22 away from the lifting lug flange 21.

[0032] The mating part 22 is used to make an interference fit with the pallet frame 10, which is achieved by cold pressing. This installation method is more efficient than the traditional welding method. The guide part 23 provides calibration and guidance during installation. The inwardly inclined guide part 23 can be easily inserted into the mounting groove 121, thereby ensuring the stability of the installation and avoiding misalignment problems during installation. The lifting lug flange 21 not only provides pressing space, but also provides mating space with the adhesive layer 30, ensuring that the entire lifting lug sleeve 20 can be firmly fixed to the pallet frame 10 through the mating part 22 and the adhesive layer 30.

[0033] In addition, in order to ensure that the interference fit can be carried out stably and accurately, it is also necessary to limit the area of ​​the interference fit, specifically: the interference amount of the interference area of ​​the mating part 22 is 0.5mm-0.2mm.

[0034] This is to avoid the problem of excessive or insufficient interference in the area of ​​overly tight fit. If the interference is too large, the lifting lug sleeve 20 will not be able to properly penetrate into the mounting groove 121. If the interference is too small, the lifting lug sleeve 20 will not be able to form a tight connection with the mounting groove 121, resulting in the installed lifting lug sleeve 20 being unable to withstand excessive external force.

[0035] In one embodiment, see Figures 3 to 5 Specifically, a through groove 24 is provided at the center of the lifting flange 21, the mating part 22, the guide part 23, and on one side of the pallet frame 10 where the lifting sleeve 20 is installed. The through groove 24 is used to install positioning parts.

[0036] The through slot 24 provides installation space for the inserted positioning component. As with the aforementioned scheme, bolts are used to install and fix the positioning component to the vehicle body. This design allows the bolt to be inserted from one side of the lifting lug sleeve 20 to the other side of the pallet frame 10. Example 2

[0037] To cooperate with Embodiment 1, a connection method for the battery tray lifting lug connection structure is also provided, applied to the battery tray lifting lug connection structure as described in Embodiment 1, comprising the following steps: S10: Apply adhesive layer 30 to the end face of the lifting flange 21 near the pallet frame 10.

[0038] This step is performed before installation. Before pressing, the adhesive layer 30 is applied to the surface of the lifting flange 21. This way, during the pressing process, only the pressing distance needs to be controlled to accurately control the overflow width of the adhesive at the contact surface between the lifting flange 21 and the pallet frame 10 to be less than 4mm, and the bonding gap to be within 0.5mm.

[0039] S20: The mating part 22 is pressed into the interior of the mounting groove 121 by a press machine using a cold pressing method to complete the installation of the connection structure.

[0040] For pressurization, a press fitting machine is used. Cold pressing is employed to press the lifting lug sleeve 20, with the adhesive layer 30 applied, into the mounting groove 121. During the pressing process, the mating part 22 enters the interior of the mounting groove 121. Because the mating part 22 has a certain interference fit, it shrinks under cold pressing, allowing it to be pressed into the mounting groove 121. Inspection is required during and after pressing to ensure that the excess adhesive width at the contact surface between the lifting lug flange 21 and the tray frame 10 is less than 4mm, and the bonding gap is within 0.5mm. This completes the connection structure of the battery tray lifting lug.

[0041] The above embodiments are merely illustrative of the technical solutions of the present invention and are not intended to limit it. Anyone skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A battery tray lifting lug connection structure, characterized in that, include: The tray frame (10) has a through mounting groove (121) on one side end face. A lifting lug sleeve (20) is interference-fitted into the mounting groove (121), and the contact surface between the lifting lug sleeve (20) and the tray frame (10) is filled with an adhesive layer (30).

2. The battery tray lifting lug connection structure according to claim 1, characterized in that: The adhesive layer (30) has an overflow width of less than 4 mm, and the bonding gap between the contact surface of the lifting lug sleeve (20) and the tray frame (10) is within 0.5 mm.

3. The battery tray lifting lug connection structure according to claim 1, characterized in that: The tray frame (10) includes an integrally formed frame one (11) and frame two (12), which are arranged in an L-shape, and the mounting groove (121) is opened on the surface of frame two (12).

4. The battery tray lifting lug connection structure according to claim 3, characterized in that: The first frame (11) has a through slot (111) inside, and the second frame (12) has two sets of through slots (122) inside, one above the other. The second slot (122) is provided with reinforcing ribs (123).

5. The battery tray lifting lug connection structure according to claim 3, characterized in that: The surface of the second frame (12) has a through slot for a positioning element that passes through the inside of the lug sleeve (20).

6. The battery tray lifting lug connection structure according to any one of claims 1-5, characterized in that: The lifting lug sleeve (20) includes a lifting lug flange (21), a mating part (22) for interference connection, and a guide part (23). The mating part (22) is integrally formed below the lifting lug flange (21), and the guide part (23) is disposed at the end of the mating part (22) away from the lifting lug flange (21).

7. The battery tray lifting lug connection structure according to claim 6, characterized in that: A through groove (24) is provided at the center of the lifting flange (21), mating part (22), guide part (23) and on the side of the pallet frame (10) where the lifting sleeve (20) is installed. The through groove (24) is used to install positioning parts.

8. The battery tray lifting lug connection structure according to claim 7, characterized in that: The interference of the interference area of ​​the mating part (22) is 0.5mm-0.2mm.

9. A connection method for a battery tray lifting lug connection structure, applied to the battery tray lifting lug connection structure as described in claim 8, characterized in that, Includes the following steps: Apply an adhesive layer (30) to the end face of the lifting flange (21) near the pallet frame (10); The mating part (22) is pressed into the installation groove (121) by a press machine using a cold pressing method to complete the installation of the connection structure.

10. The connection method of the battery tray lifting lug connection structure according to claim 9, characterized in that: During operation, the press machine needs to control the overflow width of the adhesive at the contact surface between the lifting flange (21) and the pallet frame (10) to be less than 4mm, and the bonding gap to be within 0.5mm.

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