Lightweight automobile seat backrest framework assembly

Abstract

The utility model discloses a light-weight automobile seat backrest framework assembly which comprises a composite framework body, a hollow aluminum magnesium alloy bent pipe is adopted as a main body of the composite framework body, a U-shaped supporting rod structure is formed through a hot roll bending technology, framework side plates are arranged on the left side and the right side of the supporting rod structure, and a lower cross beam is arranged at the bottom of the supporting rod structure. A honeycomb filling layer is arranged on the inner side of the composite framework main body, a modular interface system is arranged on the composite framework main body, and a magnetorheological damper is integrated at the joint of the composite framework main body and the seat sliding rail. According to the composite structure, the mass is reduced, the bending strength is improved at the same time, the modular interface supports the expansion of multiple functions, the development period is shortened, the impact force is relieved through the magneto-rheological buffering system, and collision damage is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile parts, especially to a lightweight automobile seat backrest framework assembly, which is suitable for new energy vehicles and traditional fuel vehicles and has the advantages of lightweight, high strength and multifunctional adaptability, and is especially designed for seat comfort, safety and modular expansion requirements. BACKGROUND

[0002] With the development of the automobile industry, as one of the key components of automobiles, automobile seats not only require reasonable arrangement and comfort for passengers, but also need to constantly pursue the lightweight of seats on the basis of meeting their safety performance. For example, the national regulation GB15083-2006 "Strength Requirements and Test Methods for Automotive Seats, Seat Fixing Devices and Headrests" specifies a test method for seat backrest luggage displacement passenger protection devices (referred to as luggage compartment impact test), and the backrest plate of the rear seat of the automobile plays an extremely important role in blocking and buffering the impact of the luggage compartment in the luggage compartment impact test.

[0003] The steel framework used in traditional automobile seat backrest frameworks is heavy, while the aluminum alloy framework is light but lacks impact resistance. The existing frameworks are designed for a single function and have interfaces that are difficult to adapt to diversified modules such as ventilation, heating, and waist support. During high-speed collision, the framework is prone to deformation and lacks a buffer structure to disperse impact force. SUMMARY

[0004] In order to solve the above technical problems, a lightweight automobile seat backrest framework assembly is provided.

[0005] To achieve the above purpose, the utility model discloses a lightweight automobile seat backrest framework assembly, which comprises a composite framework main body, the composite framework main body adopts a hollow aluminum-magnesium alloy elbow pipe as the main body, is formed into a U-shaped support rod structure through a hot roller bending process, the support rod structure is provided with a framework side plate on the left and right sides and a lower cross beam at the bottom, a honeycomb filling layer is arranged on the inner side of the composite framework main body, a modular interface system is arranged on the composite framework main body, and a magnetorheological damper is integrated at the connection position of the composite framework main body and the seat slide rail.

[0006] Further, the support rod structure comprises a main rod body with an opening facing downward and a vice rod body with an opening facing upward, and titanium alloy reinforcing ribs are welded at the connection nodes of the support rod structure.

[0007] Still further, the honeycomb filling layer adopts a polypropylene honeycomb core material with a density of 0.1g / cm³ to 0.3g / cm³, and an optical fiber sensor is embeddedly installed in the honeycomb filling layer.

[0008] Further, the modular interface system comprises a threaded hole array opened on the side plate of the framework and the lower crossbeam to support the plug-and-play installation of the ventilation module, the electric lumbar support and the sensor, and the interface area surface of the matrix is coated with a conductive layer.

[0009] Further, the threaded hole array is arranged in a 6*5 matrix.

[0010] Further, the energy-absorbing mechanism is installed on the side of the lower crossbeam away from the threaded hole array, and the surface of the energy-absorbing structure is provided with a collapse guide groove.

[0011] Further, the magneto-rheological damper is installed on both sides of the bottom of the lower crossbeam, and the other end of the magneto-rheological damper is connected with the damping mechanism.

[0012] Compared with the prior art, the light-weight automobile seat backrest framework assembly has the advantages that the composite structure realizes the quality reduction while improving the bending strength, the modular interface supports the expansion of various functions, the development cycle is shortened, the magneto-rheological buffering system reduces the impact force and reduces the collision damage. BRIEF DESCRIPTION OF DRAWINGS

[0013] The utility model will be further described in detail below in combination with the drawings and specific embodiments.

[0014] Figure 1 It is the overall structure schematic view of the utility model.

[0015] Figure 2 It is the side view of the utility model.

[0016] Figure 3 It is the honeycomb filling layer microstructure schematic view of the utility model.

[0017] In the drawing: 1 is the composite framework main part;11 is the support rod structure;111 is the main rod body;112 is the auxiliary rod body;12 is the framework side plate;13 is the lower crossbeam;2 is the honeycomb filling layer;21 is the optical fiber sensor;3 is the modular interface system;4 is the energy-absorbing structure;5 is the reinforcing rib;6 is the magneto-rheological damper. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0019] One embodiment of the utility model, such as Figure 1 andFigure 2 As shown, the composite framework body 1 adopts a hollow aluminum-magnesium alloy elbow pipe as the main body, the wall thickness of the elbow pipe is 1.5mm-3mm, and the elbow pipe is formed into a U-shaped support rod structure 11 through a hot roller bending process, the support rod structure 11 includes a main rod body 111 with an opening facing downward and a secondary rod body 112 with an opening facing upward, a titanium alloy reinforcing rib 5 is welded at the connecting joint of the support rod structure 11, compared with the traditional steel framework, the weight is reduced by 40%, and the bending strength is increased by 30%, the support rod structure 11 is provided with a framework side plate 12 on the left and right sides and a lower cross beam 13 at the bottom, a honeycomb filling layer 2 is arranged inside the composite framework body 1, a modular interface system 3 is arranged on the composite framework body 1, and a magneto-rheological damper 6 is integrated at the connection between the composite framework body 1 and the seat slide rail, through the integration of the composite lightweight structure, the modular interface matrix and the dynamic buffering technology, the collaborative optimization of lightweight, safety and functionality is realized, and the composite framework body 1 is suitable for new energy vehicles and traditional fuel vehicles, has the advantages of lightweight, high strength and multifunctional adaptability, and is especially designed for seat comfort, safety and modular expansion requirements.

[0020] As a preferred embodiment of the present application, carbon fiber reinforced composite materials can be used to replace part of the metal components, improve the recovery rate, and further reduce carbon emissions.

[0021] As shown in Figure 3 The honeycomb filling layer 2 adopts a polypropylene honeycomb core material with a density of 0.1g / cm³-0.3g / cm³, is combined with the composite framework body through gluing, and the energy absorption capacity is improved, and the optical fiber sensor 21 is embeddedly installed in the honeycomb filling layer 2, the optical fiber sensors are distributed at intervals in the honeycomb filling layer to form a sensor network, the stress distribution of the framework is monitored in real time, and fatigue damage is warned.

[0022] The modular interface system 3 includes a threaded hole array arranged on the framework side plate 12 and the lower cross beam 13, the threaded hole array is arranged in a 6x5 matrix to support the plug-and-play installation of the ventilation module, the electric waist support and the sensor, the surface of the interface area of the matrix is coated with a conductive layer, specifically a graphene and silver composite conductive layer, to meet the resistivity requirement, realize electromagnetic shielding and classical dissipation, and avoid electronic module interference.

[0023] The aluminum energy-absorbing mechanism 4 is installed on the side of the lower cross beam 13 away from the threaded hole array, the energy-absorbing mechanism 4 is provided with a collapse guide groove on the surface, and the framework is guided to collapse in a direction through the preset guide groove during a collision, so that the impact load on the back of the occupant is reduced.

[0024] The magneto-rheological damper 6 is installed at the bottom of the lower cross beam 13 on both sides, the other end of the magneto-rheological damper 6 is connected with a damping mechanism, the response time of the magneto-rheological damper is less than 10ms, the response speed is improved, the damping force is adjusted in real time through the vehicle-mounted ECU, and the impact of the bumpy road is adapted.

[0025] The need to explain a few points are: first, in the description of the present application, it is necessary to explain that unless otherwise specified and limited, the term "installation", "connected", "connection" should be broad, can be mechanical or electrical connection, but also can be two elements inside the communication, can be directly connected, "up", "down", "left", "right" and so on, only for indicating the relative position relationship, when the absolute position of the described object changes, the relative position relationship may change; secondly, in this paper, such as first and second relationship terms such as only to distinguish one entity from another entity, and does not necessarily require or imply that these entities have any such actual relationship or order.

[0026] The above examples are only examples of the utility model, and do not constitute a limitation on the protection scope of the utility model, any design identical or similar to the utility model belongs to the protection scope of the utility model.

Claims

1. A lightweight automotive seat backrest frame assembly, comprising a composite frame body (1), characterized in that, The composite frame body (1) is made of hollow aluminum-magnesium alloy bent tube and formed into a U-shaped support rod structure (11) by hot roll bending process. The support rod structure (11) has frame side plates (12) on the left and right sides and a lower crossbeam (13) at the bottom. The composite frame body (1) has a honeycomb filling layer (2) on the inside. The composite frame body (1) has a modular interface system (3). The composite frame body (1) is integrated with the seat slide rail at the connection point. A magnetorheological damper (6) is integrated at the connection point between the composite frame body (1) and the seat slide rail.

2. A lightweight automotive seat back frame assembly according to claim 1, characterized in that, The support rod structure (11) includes a main rod (111) with the opening facing downward and a secondary rod (112) with the opening facing upward. Titanium alloy reinforcing ribs (5) are welded at the connection nodes of the support rod structure (11).

3. A lightweight automotive seat back frame assembly according to claim 1, characterized in that, The honeycomb filling layer (2) is made of polypropylene honeycomb core material with a density of 0.1g / cm³ to 0.3g / cm³. An optical fiber sensor (21) is embedded in the honeycomb filling layer (2).

4. A lightweight automotive seat back frame assembly according to claim 1, characterized in that, The modular interface system (3) includes an array of threaded holes on the frame side plate (12) and the lower crossbeam (13) to support plug-and-play installation of the ventilation module, electric lumbar support and sensor, and the interface area surface of the matrix is ​​coated with a conductive layer.

5. A lightweight automotive seat back frame assembly according to claim 4, characterized in that, The threaded hole array is arranged in a 6×5 matrix.

6. A lightweight automotive seat backrest frame assembly according to claim 1, characterized in that, An energy-absorbing structure (4) is installed on the side of the lower crossbeam (13) away from the threaded hole array, and a collapse guide groove is provided on the surface of the energy-absorbing structure (4).

7. A lightweight automotive seat backrest frame assembly according to claim 1, characterized in that, The magnetorheological damper (6) is installed on both sides of the bottom of the lower crossbeam (13), and the other end of the magnetorheological damper (6) is connected to the vibration reduction mechanism.

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