New energy automobile mute plate and nut riveting combined structure

Abstract

The utility model provides a new energy automobile silence plate and nut riveting combination structure, include: silence plate and pressure riveting nut, one or more riveting holes are predeterminated on the silence plate, and pressure riveting nut corresponds and is riveted into every riveting hole, the pressure riveting nut includes pressure riveting nut body, the bottom of pressure riveting nut body is provided with flange bottom surface, the flange bottom surface is integrally provided with the annular riveting boss of going down convex, the pressure riveting nut body is placed on the riveting hole, and the pressure of annular riveting boss is applied to riveting equipment to riveting, makes annular riveting boss produce plastic deformation and tightly cover in the edge of riveting hole, forms the connecting body of mechanical interlock and interference fit combination. The new energy automobile silence plate and nut riveting combination structure of the utility model need not welding operation, can realize high strength, high sealing, high efficiency's connection, especially suitable for multilayer composite silence plate material.

Description

Technical Field

[0001] This utility model relates to the field of riveting structure technology, specifically to a riveting structure for a soundproof panel and nut in a new energy vehicle. Background Technology

[0002] With the increasing popularity of new energy vehicles, the NVH (noise, vibration, and harshness) performance of the entire vehicle is becoming increasingly important. Soundproofing panels (typically a "sandwich" structure made of steel / aluminum plates and damping materials) are key components for improving cabin quietness and usually need to be bolted to the vehicle body structure. Therefore, nuts need to be pre-fixed to the soundproofing panels.

[0003] Currently, common connection methods have the following significant problems:

[0004] (1) Projection welding of nuts: This method is widely used in traditional car bodies. However, the sound insulation panels of new energy vehicles are mostly non-metallic or composite laminate structures such as polymer composites, which are not conductive or heat-resistant, and cannot be welded.

[0005] (2) Rivet nuts: This method is widely applicable, but the connection strength depends on the strength of the substrate. It has low strength and large radial expansion force on soft substrates, which can easily lead to interlayer peeling and crushing of the substrate. Moreover, the sealing performance is generally poor, and it is easy to cause sound / liquid leakage.

[0006] (3) Bonding nuts: High-strength structural adhesive is used for bonding. This method is simple, but it has problems such as long curing time, unstable high temperature resistance and aging resistance, and large dispersion of connection strength. It is also more likely to fall off under long-term vibration environment.

[0007] Therefore, existing technologies cannot adequately meet the comprehensive requirements of new energy vehicle soundproofing panels for connection strength, sealing performance, production efficiency, and environmental adaptability. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model proposes a new energy vehicle soundproof panel and nut riveting connection structure that eliminates the need for welding and achieves a high-strength, high-sealing, and high-efficiency connection, making it particularly suitable for multi-layer composite soundproof panel materials.

[0009] To achieve the above technical solution, this utility model provides a new energy vehicle soundproof panel and nut riveting connection structure, including: a soundproof panel and a rivet nut. The soundproof panel has one or more pre-set rivet holes, and the rivet nut is riveted into each rivet hole. The rivet nut includes a rivet nut body, and the bottom of the rivet nut body is provided with a flange bottom surface. The flange bottom surface is integrally provided with a downwardly protruding annular rivet boss. The rivet nut body is placed on the rivet hole. Pressure is applied to the annular rivet boss by a riveting device, causing the annular rivet boss to undergo plastic deformation and tightly wrap around the edge of the rivet hole, forming a connection body that combines mechanical interlocking and interference fit.

[0010] In the above technical solution, the actual assembly mainly includes the following steps:

[0011] S1: Material preparation: Prepare a soundproof plate with pre-set rivet holes and a press-fit nut with an annular rivet boss.

[0012] S2: Positioning: Precisely place the press-fit nut onto the corresponding press-fit hole on the soundproof plate, ensuring that the axis of the press-fit nut is aligned with the axis of the press-fit hole.

[0013] The axes coincide;

[0014] S3: Riveting: Applying vertical pressure to the annular riveting boss using the upper and lower dies of the riveting equipment, with a pressure range of 20-23KN;

[0015] S4: Forming: The annular riveting boss undergoes plastic deformation under pressure, flows outwards and tightly wraps around and fastens to the edge of the riveting hole, completing the connection.

[0016] Preferably, the cross-section of the annular riveting boss is one of trapezoidal, semi-circular, or rectangular to adapt to different strength and deformation requirements.

[0017] Preferably, the soundproof panel is a multi-layer composite structure, specifically including a constraint plate, a damping plate and a base soundproof panel designed from top to bottom. The damping plate is sandwiched between the constraint plate and the base soundproof panel, and the riveting holes pass through the constraint plate, the damping plate and the base soundproof panel from top to bottom.

[0018] Preferably, the annular riveting boss is deformed and fills the pores of the damping plate to form a sealing structure. During riveting, the deformed boss material can be partially embedded in the pores of the base sound insulation board, which enhances the connection strength and sealing effect.

[0019] Preferably, the center of the press-fit nut body is provided with a central threaded hole that runs longitudinally through the press-fit nut body, and the central threaded hole is provided with an internal thread to facilitate external connection with subsequent bolts.

[0020] The beneficial effects of the new energy vehicle soundproof panel and nut riveting joint structure provided by this utility model are as follows:

[0021] (1) High connection strength: The plastic deformation of the annular riveting boss and the riveting hole form a mechanical interlock, resulting in excellent tensile and torsional resistance.

[0022] (2) Good sealing performance: The riveted deformable body can effectively fill the pores of the soundproof plate and form a reliable sealing ring.

[0023] (3) Wide process adaptability: It does not depend on the conductivity of the material and is suitable for various metal and non-metal composite soundproof panels. The operation can be completed on one side, with low requirements for assembly space, making it very suitable for efficient operation on the automobile assembly line.

[0024] (4) Environmentally friendly and reliable: No welding fumes are affected, avoiding the risk of material performance degradation due to high temperature.

[0025] (5) Cost-effectiveness: The nut has a simple structure and can be mass-produced by cold heading process, which is inexpensive. The riveting equipment is highly versatile, the production cycle is fast, and the overall production cost is low. Attached Figure Description

[0026] Figure 1 This is a cross-sectional view of the assembly structure of this utility model.

[0027] Figure 2 This is an exploded view of the structure before the riveting connection of this utility model.

[0028] Figure 3 This is a schematic diagram of the structure after riveting connection according to this utility model.

[0029] Figure 4 This is a cross-sectional structural diagram of a press-fit nut.

[0030] In the diagram: 1. Soundproof panel; 11. Constraint plate; 12. Damping plate; 13. Base soundproof panel; 2. Riveting hole; 3. Press-fit nut; 31. Press-fit nut body; 32. Flange bottom surface; 33. Annular riveting boss; 34. Internal thread; 35. Center screw hole. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0032] Example: A structure for riveting a soundproof panel and a nut together in a new energy vehicle.

[0033] Reference Figures 1 to 4 As shown, a new energy vehicle soundproof panel and nut riveting combination structure includes: a soundproof panel 1 and a rivet nut 3. The soundproof panel 1 has multiple rivet holes 2 pre-set on it, and the rivet nut 3 is riveted into each rivet hole 3. The soundproof panel 1 is a multi-layer composite structure, specifically including a constraint plate 11, a damping plate 12 and a base sound insulation plate 13 designed from top to bottom. The damping plate 12 is sandwiched between the constraint plate 11 and the base sound insulation plate 13. The rivet holes 2 pass through the constraint plate 11, the damping plate 12 and the base sound insulation plate 13 from top to bottom.

[0034] The press-fit nut 3 includes a press-fit nut body 31. A flange bottom surface 32 is provided at the bottom of the press-fit nut body 31. An annular pressing boss 33, protruding downwards, is integrally provided on the flange bottom surface 32. The cross-section of the annular pressing boss 33 is trapezoidal. A central threaded hole 35, extending longitudinally through the press-fit nut body 31, is provided at the center of the press-fit nut body 31. An internal thread 34 is provided in the central threaded hole 35 to facilitate external connection with subsequent bolts. During actual assembly, the press-fit nut body 31 is placed on the pressing hole 2. Pressure is applied to the annular pressing boss 33 using a riveting device, causing the annular pressing boss 33 to undergo plastic deformation and tightly wrap around the edge of the pressing hole 2, forming a connection combining mechanical interlocking and interference fit. After the annular pressing boss 33 deforms and fills the gaps in the damping plate 12, a sealing structure is formed. During riveting, the deformed boss material can partially embed into the gaps in the base sound insulation board 13, enhancing the connection strength and sealing effect.

[0035] In this implementation, the actual assembly mainly includes the following steps:

[0036] S1: Material preparation: Prepare a soundproof plate 1 with a pre-set rivet hole 3 and a rivet nut 3 with an annular rivet boss 33.

[0037] S2: Positioning: Precisely place the press-fit nut 3 on the corresponding press-fit hole 3 of the soundproof plate 1, so that the axis of the press-fit nut 3 is aligned with...

[0038] The axes of the rivet holes 2 coincide;

[0039] S3: Riveting: Apply vertical pressure to the annular riveting boss 33 using the upper and lower dies of the riveting equipment. The pressure range is 20-23KN.

[0040] S4: Forming: The annular riveting boss 33 undergoes plastic deformation under pressure, flows outwards and tightly wraps around and fastens to the edge of the riveting hole 2, completing the connection.

[0041] Compared with traditional connection structures, the new energy vehicle soundproofing plate and nut riveting connection structure provided by this utility model has the following advantages:

[0042] (1) High connection strength: The plastic deformation of the annular riveting boss 33 and the riveting hole 2 form a mechanical interlock, resulting in excellent tensile and torsional resistance.

[0043] (2) Good sealing performance: The riveted deformable body can effectively fill the pores of the silent plate 1 to form a reliable sealing ring.

[0044] (3) Wide process adaptability: It does not depend on the conductivity of the material and is suitable for various metal and non-metal composite soundproof panels. It can be operated on one side only, with low requirements for assembly space, making it very suitable for efficient operation on automobile assembly lines.

[0045] (4) Environmentally friendly and reliable: No welding fumes are affected, avoiding the risk of material performance degradation due to high temperature.

[0046] (5) Good cost-effectiveness: The riveting nut 3 has a simple structure and can be mass-produced by cold heading process. It is inexpensive, the riveting equipment is highly versatile, the production cycle is fast, and the overall production cost is low.

[0047] The above description is only a preferred embodiment of the present utility model. However, the present utility model should not be limited to the content disclosed in the embodiment and the accompanying drawings. Therefore, any equivalent or modified embodiments made without departing from the spirit disclosed in the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A structure for riveting a soundproof panel and a nut together in a new energy vehicle, comprising a soundproof panel and a press-fit nut, characterized in that: The soundproof plate has one or more pre-set riveting holes. Riveting nuts are riveted into each riveting hole. The riveting nut includes a riveting nut body. The bottom of the riveting nut body is provided with a flange bottom surface. The flange bottom surface is integrally provided with a downwardly protruding annular riveting boss. The riveting nut body is placed on the riveting hole. Pressure is applied to the annular riveting boss by a riveting device, causing the annular riveting boss to undergo plastic deformation and tightly wrap around the edge of the riveting hole, forming a connection body that combines mechanical interlocking and interference fit.

2. The new energy vehicle soundproofing plate and nut riveting joint structure according to claim 1, characterized in that: The cross-section of the annular riveting boss is one of trapezoidal, semi-circular, or rectangular.

3. The new energy vehicle soundproofing plate and nut riveting joint structure according to claim 1, characterized in that: The soundproof panel is a multi-layer composite structure, specifically including a constraint plate, a damping plate, and a base sound insulation plate designed from top to bottom. The damping plate is sandwiched between the constraint plate and the base sound insulation plate, and the riveting holes pass through the constraint plate, the damping plate, and the base sound insulation plate from top to bottom.

4. The new energy vehicle soundproofing plate and nut riveting joint structure according to claim 3, characterized in that: After the annular riveting boss deforms, it fills the pores of the damping plate to form a sealing structure.

5. The new energy vehicle soundproofing plate and nut riveting joint structure according to claim 1, characterized in that: The center of the press-fit nut body is provided with a central threaded hole that runs longitudinally through the press-fit nut body, and the central threaded hole is provided with an internal thread.

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