CD column assembly, vehicle body and vehicle
Through the integrated molded CD column assembly body, the riveting and screw connection methods are adopted to solve the problems of large number of traditional CD column assembly parts and insufficient structural strength, reducing costs and improving body stiffness, and enhancing the vehicle's endurance and interior space.
Patent Information
- Application Number
- CN202422619752.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-29
- Publication Date
- 2025-08-22
- Estimated Expiration
- 2034-10-29
AI Technical Summary
The existing vehicle CD column assembly is welded by multiple sheet metal stamping parts, resulting in a large number of parts, complex welding equipment, high manufacturing costs, and insufficient structural stiffness, which affects the comfort of the vehicle body and the overall connection strength.
The main body of the CD column assembly is adopted, including the lower part of the C column and the lower part of the D column, connected by riveting or screwing, combined with structural glue filling, and using aluminum alloy or carbon fiber materials to reduce the number of parts and welding processes and increase structural strength.
It reduces manufacturing costs, increases the strength of the body structure, avoids sagging of the door, increases the vehicle's endurance, and provides more interior space.
Smart Images
Figure CN223253085U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of vehicle technology, and in particular to a CD column assembly, a vehicle body, and a vehicle. Background Art
[0002] Currently, the CD pillar components of vehicles are all traditional steel structures, which are welded together by multiple sheet metal stamping parts such as the C pillar, D pillar, and rear side inner and outer panels. This structural setting has the following main disadvantages:
[0003] The spot welding process, which involves welding multiple sheet metal parts together, requires numerous components, extensive welding equipment, and a complex process, resulting in high manufacturing costs. The overall stiffness of the rear side panel is affected by the performance of the weld joints, leading to local structural defects and insufficient overall structural strength. The rear side panel CD pillar structure typically bears the various operating forces of the rear suspension chassis and tailgate hinges, requiring high stiffness and strength, and requiring numerous load-bearing structural components to withstand these various loads. Insufficient CD pillar stiffness can lead to performance issues such as poor vehicle comfort and door droop. Utility Model Content
[0004] In order to solve the above technical problems, the present application provides a CD column assembly, a body and a vehicle, which simplify the manufacturing process, reduce manufacturing costs, ensure the structural strength of the body, and prevent the door from sagging.
[0005] The technical solution adopted by this application to solve its technical problems is:
[0006] A CD pillar assembly comprises an assembly body, a C pillar lower portion and a D pillar lower portion;
[0007] The component body is integrally formed and comprises:
[0008] The upper part of the C-pillar and the upper part of the D-pillar are arranged opposite each other;
[0009] An upper side rail, whose two ends in the length direction are respectively connected to the upper end of the upper portion of the C-pillar and the upper end of the upper portion of the D-pillar, and defines a mounting position with the upper portion of the C-pillar and the upper portion of the D-pillar;
[0010] An integrated body is provided at the installation position, with its upper portion connected to the roof rail, and its two ends in the length direction respectively connected to the upper portion of the C-pillar and the upper portion of the D-pillar; and
[0011] The C-pillar lower portion is connected to the lower end of the C-pillar upper portion to form a C-pillar;
[0012] The D-pillar lower portion is connected to a lower end of the D-pillar upper portion to form a D-pillar.
[0013] In some embodiments, a plurality of reinforcing beams are provided on the outer side of the integrated body, and the plurality of reinforcing beams are arranged in sequence along the length direction of the integrated body.
[0014] In some embodiments, the plurality of reinforcing beams define the integrated body into a plurality of body units, and at least some of the body units are provided with glue grooves on their outer sides, and the glue grooves are used to be filled with structural glue.
[0015] In some embodiments, the outer sides of the reinforcing beam, the upper portion of the C-pillar, the upper portion of the D-pillar, and the upper side beam are all provided with reinforcing ribs.
[0016] In some embodiments, the upper portion of the C-pillar and the lower portion of the C-pillar, and the upper portion of the D-pillar and the lower portion of the D-pillar are connected by riveting or screwing, and the connection between the upper portion of the C-pillar and the lower portion of the C-pillar, and the connection between the upper portion of the D-pillar and the lower portion of the D-pillar are filled with structural adhesive.
[0017] In some embodiments, a reinforcement plate is provided at one end of the upper side beam close to the C-pillar, the reinforcement plate is connected to the upper side beam by riveting or screwing, and the connection between the reinforcement plate and the upper side beam is filled with structural adhesive.
[0018] In some embodiments, the upper portion of the C-pillar is provided with a rear door hinge mounting hole;
[0019] The upper side beam is provided with a top cover door support rod mounting hole and a top cover door lock mounting hole;
[0020] The upper portion of the D-pillar is provided with a rear tailgate hinge mounting hole.
[0021] In some embodiments, the lower portion of the C-pillar includes a first inner panel and a first outer panel that are interlocked, and the upper portion of the C-pillar is connected between the first inner panel and the first outer panel;
[0022] The lower portion of the D-pillar includes a second inner panel and a second outer panel that are interlocked with each other, and the upper portion of the D-pillar is connected between the second inner panel and the second outer panel.
[0023] In some embodiments, the component body is made of aluminum or aluminum alloy and is integrally die-cast;
[0024] Or the component body is made of carbon fiber.
[0025] A vehicle body comprises the above-mentioned CD column assembly.
[0026] A vehicle comprises the above-mentioned vehicle body.
[0027] Compared with the prior art, the CD pillar assembly, vehicle body, and vehicle of the embodiments of the present application have the following advantages: by splitting the CD pillar assembly into the assembly body, the C-pillar lower portion, and the D-pillar lower portion, and forming the assembly body into an integral unit, not only the number of parts is reduced, but also the welding process and the stamping and welding equipment are reduced, thereby reducing manufacturing costs;
[0028] At the same time, the main body of the component is molded in one piece, making the parts highly integrated into one, effectively reducing the division of parts and scattered weld connections, avoiding weld failure and local blocks without connection that will cause the structural rigidity to deteriorate, thereby improving the rigidity performance of the body, ensuring the structural strength of the body, and avoiding door sagging. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] Figure 1 This is a schematic diagram of the outer structure of the CD column assembly of this application.
[0030] Figure 2 This is a schematic diagram of the inner structure of the CD column assembly of this application.
[0031] Figure 3 This is a schematic structural diagram of the CD column assembly of the present application connected to the rear wheel arch outer panel.
[0032] Among them: 100-component body, 1-lower part of C-pillar, 2-lower part of D-pillar, 3-upper part of C-pillar, 4-upper part of D-pillar, 5-upper side beam, 6-integrated body, 7-reinforcement beam, 8-glue groove, 9-reinforcement rib, 10-reinforcement plate, 11-rear door hinge mounting hole, 12-top cover door strut mounting hole, 13-top cover door lock mounting hole, 14-rear tailgate hinge mounting hole, 15-first inner panel, 16-first outer panel, 17-second inner panel, 18-second outer panel, 19-seam line, 20-main body unit, 200-rear wheel arch outer panel. DETAILED DESCRIPTION
[0033] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0034] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.
[0035] In the following description of this application, the inner side is based on the side close to the inside of the vehicle after the CD column assembly is installed; the outer side is based on the side close to the outside of the vehicle after the CD column assembly is installed; the length direction is the same as the length direction of the vehicle.
[0036] like Figure 1 、 2As shown, a CD column assembly according to a preferred embodiment of the present application includes an assembly body 100 (with attached Figure 2 The component body 100 is formed integrally with the C-pillar lower portion 1 and the D-pillar lower portion 2, with the seam 19 being the dividing line in the center. Specifically, the component body 100 can be made of a lightweight metal such as aluminum or an aluminum alloy, using one-piece die-casting. Alternatively, carbon fiber can be used to achieve component integration and vehicle body lightweighting. However, carbon fiber is more expensive and the manufacturing process is more complex, resulting in higher overall costs than aluminum alloys and a lower cost-performance ratio, so it is generally not used. The following description assumes that the component body 100 is made of aluminum or an aluminum alloy, using one-piece die-casting.
[0037] The component body 100 includes an upper side beam 5 and an integrated body 6, namely, a C-pillar upper part 3 and a D-pillar upper part 4 arranged opposite to each other; the two ends of the upper side beam 5 in the length direction are respectively connected to the upper end of the C-pillar upper part 3 and the upper end of the D-pillar upper part 4, and define a mounting position with the C-pillar upper part 3 and the D-pillar upper part 4; the integrated body 5 integrates the rear side inner panel and the rear wheel cover inner panel, which is arranged at the mounting position, and its upper part is connected to the upper side beam 5, and its two ends in the length direction are respectively connected to the C-pillar upper part 3 and the D-pillar upper part 4; the C-pillar lower part 1 is connected to the lower end of the C-pillar upper part 3 to form a C-pillar; the D-pillar lower part 2 is connected to the lower end of the D-pillar upper part 4 to form a D-pillar.
[0038] Specifically, the C-pillar lower portion 1 and the D-pillar lower portion 2 are both steel sheet metal structures, which are connected to other steel sheet metal structures of the vehicle body by spot welding to realize the connection between the CD-pillar assembly and the vehicle body. However, it is impossible to directly spot weld the cast aluminum parts and the steel sheet metal parts, so the C-pillar upper portion 3 and the C-pillar lower portion 1, and the D-pillar upper portion 4 and the D-pillar lower portion 2 are connected by riveting or screwing, and the connection between the C-pillar upper portion 3 and the C-pillar lower portion 1, and the connection between the D-pillar upper portion 4 and the D-pillar lower portion 2 are filled with structural adhesive. Among them, the riveting is preferably self-piercing riveting, that is, the structural strength of the C-pillar and the D-pillar is guaranteed by the connection method of punch riveting or screwing + structural adhesive, and the same vehicle body connection strength performance requirements as traditional steel sheet metal spot welding are achieved. Among them, the screwing is preferably SWOP nail connection.
[0039] In this embodiment, the C-pillar lower portion 1 comprises a first inner panel 15 and a first outer panel 16 that interlock together. The C-pillar upper portion 3 is connected between the first inner panel 15 and the first outer panel 16. Structural adhesive is applied between the first inner panel 15 and the C-pillar lower portion 1, and between the first outer panel 16 and the C-pillar lower portion 1. The D-pillar lower portion 2 comprises a second inner panel 17 and a second outer panel 18 that interlock together. The D-pillar upper portion 4 is connected between the second inner panel 17 and the second outer panel 18. Structural adhesive is applied between the second inner panel 17 and the D-pillar lower portion 2, and between the second outer panel 18 and the D-pillar lower portion 2. After the structural adhesive is applied and the inner and outer panels are interlocked, they are connected using self-piercing rivets or screws, fully ensuring the structural strength of the C-pillar and D-pillar.
[0040] The CD pillar assembly based on the above features is divided into the assembly body 100, the C pillar lower portion 1 and the D pillar lower portion 2, and the assembly body 100 is integrally die-casted, which not only reduces the number of parts, but also reduces the welding process and stamping and welding equipment, thereby reducing manufacturing costs;
[0041] At the same time, the component body 100 is integrally die-cast, which makes the parts highly integrated into one body, effectively reducing the number of parts blocks and scattered weld connections, avoiding weld failure and local block disconnection that would cause the structural strength to deteriorate, thereby improving the body strength performance, ensuring the structural strength of the body, and preventing the door from sagging;
[0042] In addition, the component body 100 is made of aluminum. Compared with a steel structure, the one-piece die-cast structure is lighter in weight with the same size structure, thereby reducing the weight of the vehicle body and increasing the vehicle's endurance.
[0043] In this embodiment, a plurality of reinforcing beams 7 are provided on the outside of the integrated body 6, and the plurality of reinforcing beams 7 are arranged in sequence along the length direction of the integrated body 6. The reinforcing beams 7 themselves extend in the up-down direction, or are tilted at a certain angle, thereby improving the overall stiffness and strength of the CD column assembly. In addition, in order to further improve the overall stiffness and strength of the CD column assembly, reinforcing ribs 9 can be provided on the outside of the reinforcing beams 7, the upper portion of the C-pillar 3, the upper portion of the D-pillar 4, and the upper side beam 5. However, due to the different forces on different parts of the vehicle body, honeycomb-shaped reinforcing ribs 9 can be designed in areas with high forces to enhance local stiffness and strength; for areas with low performance requirements, the arrangement of reinforcing ribs 9 can be reduced. By optimizing the arrangement of the reinforcing ribs 9, the vehicle body performance target requirements can be achieved under the premise of optimal weight.
[0044] Compared to traditional bodywork, which is influenced by sheet metal stamping processes and imposes significant restrictions on parts installed on the body, the layout of the mounting parts must meet the requirements of the stamping process or welding process restrictions, which is not conducive to the expansion of interior space and the free selection of mounting parts. The integrated die-casting solution of the CD column assembly in this application can achieve matching design of mounting points in all directions of the mounting parts. By arranging reinforcing ribs 9, the width of the cavity between the rear side panel outer panel and the rear side panel inner panel is reduced, thereby increasing the demand for interior space and providing more space for vehicle layout.
[0045] In actual production, after the CD pillar assembly is installed, a side panel is installed on the outside of the integrated body 6. To ensure the overall aesthetics of the vehicle and improve the dent resistance of the side panel, multiple reinforcement beams 7 define the integrated body 6 into multiple body units 20. Adhesive grooves 8 are provided on the outside of at least some of these body units 20. These grooves are filled with structural adhesive. After complete installation, the structural adhesive abuts and connects the side panel, thereby improving the dent resistance of the side panel surface. Furthermore, the adhesive grooves 8 are manufactured using a flanging process to enhance the strength of the integrated body 6.
[0046] In addition, a glue groove may be provided on the inner side of the main body unit 20 , and the glue groove is filled with glue to connect with the interior decoration of the vehicle.
[0047] In this embodiment, a reinforcement plate 10 is provided at one end of the upper rail 5 near the C-pillar. This reinforcement plate 10 is made of sheet metal and extends toward the front of the vehicle, serving to connect to the upper rail of the roof. The reinforcement plate 10 is connected to the upper rail 5 by riveting or screwing, and the connection between the reinforcement plate and the upper rail is filled with structural adhesive. Self-piercing riveting is preferred. This combination of punch riveting or screwing combined with structural adhesive ensures the connection strength between the CD-pillar assembly and the roof, achieving the same strength performance requirements as traditional steel spot welding.
[0048] In this embodiment, the upper part 3 of the C-pillar is provided with a rear door hinge mounting hole 11 for installing the rear door hinge; the upper side beam 5 is provided with a roof door strut mounting hole 12 and a roof door lock mounting hole 13, which are used to install the roof door strut and the roof door lock respectively; the upper part 4 of the D-pillar is provided with a rear tailgate hinge mounting hole 14 for installing the rear tailgate hinge.
[0049] like Figure 3As shown, after the CD-pillar assembly is installed, the rear wheelhouse outer panel 200 needs to be installed. The rear wheelhouse outer panel 200 is connected to the rear wheelhouse inner panel. Since the rear wheelhouse inner panel is integrated into the integrated body 6, the rear wheelhouse outer panel 200 is connected to the CD-pillar assembly. Specifically, the upper portion of the rear wheelhouse outer panel 200 is connected to the integrated body 6 by punch riveting or screwing, and at least part of the ends of the rear wheelhouse outer panel 200 are connected to the lower portion of the C-pillar and the lower portion of the D-pillar by spot welding.
[0050] As can be seen from the above, the majority of the existing structure, which is made up of multiple welded sheet metal stamping parts, can be integrated into a die-cast aluminum alloy component body part and a small number of sheet metal stamping parts (reinforcement plate, C-pillar lower part, D-pillar lower part), forming a large cast aluminum component body 100 and a small number of sheet metal parts. The number of sheet metal parts can be greatly reduced. Taking a certain vehicle model as an example, the CD pillar component structure of this technical solution is applied. Please refer to the table below for details. It is a CD pillar component solution on one side of the vehicle:
[0051]
[0052] As can be seen from the above table, the CD pillar assembly solution on both sides of the vehicle can reduce the number of sheet metal parts by 72 per vehicle and reduce the body weight by 31kg per vehicle.
[0053] To address the above technical issues, the present application further provides a vehicle comprising a vehicle body structure including the aforementioned CD pillar assembly. This vehicle simplifies manufacturing processes, reduces manufacturing costs, ensures vehicle body structural strength, prevents door sagging, reduces vehicle body weight, and increases vehicle range.
[0054] The above is only a preferred embodiment of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and replacements can be made without departing from the technical principles of the present application. These improvements and replacements should also be regarded as the scope of protection of the present application.
Claims
1. A CD column assembly, characterized in that: Includes the component body, C-pillar lower portion, and D-pillar lower portion; The component body is integrally formed and comprises: The upper part of the C-pillar and the upper part of the D-pillar are arranged opposite each other; An upper side rail, whose two ends in the length direction are respectively connected to the upper end of the upper portion of the C-pillar and the upper end of the upper portion of the D-pillar, and defines a mounting position with the upper portion of the C-pillar and the upper portion of the D-pillar; An integrated body, provided at the installation position, with its upper portion connected to the roof rail, and its two ends in the length direction respectively connected to the upper portion of the C-pillar and the upper portion of the D-pillar; and The C-pillar lower portion is connected to the lower end of the C-pillar upper portion to form a C-pillar; The D-pillar lower portion is connected to a lower end of the D-pillar upper portion to form a D-pillar.
2. The CD column assembly according to claim 1, wherein: A plurality of reinforcing beams are provided on the outer side of the integrated body, and the plurality of reinforcing beams are arranged in sequence along the length direction of the integrated body.
3. The CD column assembly according to claim 2, wherein: The plurality of reinforcing beams define the integrated body into a plurality of body units, and adhesive grooves are provided on the outer sides of at least some of the body units, and the adhesive grooves are used to be filled with structural adhesive.
4. The CD column assembly according to claim 2, wherein: The outer sides of the reinforcing beam, the upper portion of the C-pillar, the upper portion of the D-pillar and the upper side beam are all provided with reinforcing ribs.
5. The CD column assembly according to claim 1, wherein: The upper portion of the C-pillar and the lower portion of the C-pillar, and the upper portion of the D-pillar and the lower portion of the D-pillar are connected by riveting or screwing, and the connection between the upper portion of the C-pillar and the lower portion of the C-pillar, and the connection between the upper portion of the D-pillar and the lower portion of the D-pillar are filled with structural adhesive.
6. The CD column assembly according to any one of claims 1 to 5, wherein: A reinforcing plate is provided at one end of the upper side beam close to the C-pillar. The reinforcing plate is connected to the upper side beam by riveting or screwing, and the connection between the reinforcing plate and the upper side beam is filled with structural adhesive.
7. The CD column assembly according to any one of claims 1 to 5, wherein: A rear door hinge mounting hole is provided on the upper portion of the C-pillar; The upper side beam is provided with a top cover door support rod mounting hole and a top cover door lock mounting hole; The upper portion of the D-pillar is provided with a rear tailgate hinge mounting hole.
8. The CD column assembly according to any one of claims 1 to 5, wherein: The lower portion of the C-pillar includes a first inner panel and a first outer panel that are interlocked with each other, and the upper portion of the C-pillar is connected between the first inner panel and the first outer panel; The lower portion of the D-pillar includes a second inner panel and a second outer panel that are interlocked with each other, and the upper portion of the D-pillar is connected between the second inner panel and the second outer panel.
9. The CD column assembly according to any one of claims 1 to 5, wherein: The component body is made of aluminum or aluminum alloy and is integrally die-cast; Or the component body is made of carbon fiber.
10. A vehicle body, characterized in that: The method comprises the CD column assembly according to any one of claims 1 to 9.
11. A vehicle, characterized in that: The vehicle body comprising the vehicle body according to claim 10.