Automobile upper stand column

Abstract

According to the automobile upper stand column, the outer surface of the upper stand column is wrapped with the cloth, part of the cloth is reversely wrapped to the inner side of the upper stand column along the edge of the upper stand column and at least covers the easy-to-break area of the upper stand column, and therefore fragments generated by local breakage of the upper stand column are effectively prevented from splashing, and the safety performance of an automobile is improved; in addition, redundant cloth on the edge of the upper stand column after mold stripping is directly used for reverse wrapping, the production cost can be effectively saved, and the production steps are simplified.

Description

Technical Field

[0001] The utility model relates to the field of vehicles, in particular to an upper pillar of an automobile. Background Art

[0002] In order to protect the safety of passengers in the car, airbags are usually placed on both sides of the car's roof and doors. The airbags can automatically pop out and deploy when the car is in danger. During the deployment process, the roof and upper pillars need to be partially propped open. Since the upper pillars of the car are mostly made of plastic, the upper pillars are easily partially broken when they are impacted during the deployment of the airbags. The fragments formed by the fracture can easily injure passengers and may also scratch the air curtain and make it ineffective, posing certain safety hazards. Utility Model Content

[0003] In view of this, an embodiment of the utility model provides an automobile upper pillar to solve the technical problem that fragments generated by partial fracture of the automobile upper pillar pose a safety hazard.

[0004] The utility model provides an automobile upper pillar, the outer surface of which is covered with cloth, part of which is wrapped along the edge of the upper pillar to the inner side of the upper pillar and at least covers the easily broken area of ​​the upper pillar.

[0005] Optionally, the easily breakable area of ​​the upper pillar is verified by a safety airbag detonation experiment.

[0006] Optionally, a plurality of reinforcing ribs are provided on the inner side of the easily-broken area of ​​the upper column.

[0007] Optionally, the turned-up portion of the fabric is fixed to the reinforcing rib by welding.

[0008] The embodiments of the utility model have the following beneficial effects: the outer surface of the upper column is covered with cloth, and part of the cloth is turned back along the edge of the upper column to the inner side of the upper column and covers the easily broken area of ​​the upper column, thereby effectively preventing the splashing of fragments caused by the local breakage of the upper column and improving the safety performance of the vehicle; in addition, the excess cloth on the edge of the upper column after demolding is directly used for turning back, which can effectively save production costs and simplify production steps. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0010] Figure 1 This is a schematic diagram of the structure of the upper column in the embodiment of the utility model;

[0011] Figure 2 This is a schematic diagram of the material distribution position during the production of the upper column in the embodiment of the utility model;

[0012] The numbers in the figure represent:

[0013] 1. Upper column; 2. Fabric; 3. Reinforcement ribs; 4. Injection mold for upper column; 5. Fixing holes. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the utility model, and are not used to limit the utility model.

[0015] See also Figure 1 As shown, the embodiment of the utility model provides an automobile upper pillar, the outer surface of the upper pillar 1 is covered with a cloth 2 to increase the aesthetics of the upper pillar 1 and improve its impact resistance. Part of the cloth 2 is wrapped along the edge of the upper pillar 1 to the inner side of the upper pillar 1 and at least covers the easily broken area of ​​the upper pillar 1, so that the fragments formed by the easily broken area when impacted can be wrapped in the cloth 2, effectively avoiding the safety hazard caused by the splashing of the fragments, and improving the safety performance of the vehicle.

[0016] Considering that the structures of upper pillars 1 of different cars are not the same, and the easily broken areas of upper pillars 1 of different structures are also different, it is best to verify the specific easily broken areas of the upper pillars 1 through airbag detonation experiments before the fabric 2 is reversed. In addition, multiple reinforcing ribs 3 can be set inside the easily broken areas of the upper pillars 1. The reinforcing ribs 3 can strengthen the strength of the easily broken areas on the one hand, and can also be used as welding ribs to weld and fix the reversed parts of the fabric 2 to prevent them from falling off.

[0017] The production process of the upper column 1 mainly includes the following steps:

[0018] S1. Before injection molding, lay the pre-cut cloth 2 on the cavity side of the upper column injection mold 4, and position and fix the cloth 2 through the fixing holes 5 (such as Figure 2 As shown), the edge of the fabric 2 needs to have sufficient processing allowance;

[0019] S2. The upper column 1 is injection molded by a low-pressure injection molding process (in the prior art, the holding pressure is set to 0 bar);

[0020] S3. After demolding, trim the excess fabric 2 on the edge of the upper column 1. The long straight edge fabric 2 can be trimmed using ultrasonic equipment (for reference, the ultrasonic energy is 240-270W, and the cycle is 5-6S). Manual trimming is required for special complex structures. When trimming, it is necessary to retain enough fabric 2 on the edge of the easily broken area of ​​the upper column 1 for wrapping and covering the easily broken area.

[0021] S4. Wrap the retained fabric 2 along the edge of the upper column 1 to the inner side of the upper column 1 and cover the easily broken area of ​​the upper column 1. Use an ultrasonic welding gun to locally weld and fix the wrapped part of the fabric 2 to the reinforcing rib 3 on the inner side of the upper column 1 (for reference, the ultrasonic energy is 200-250W, and the single-point welding cycle is 1-2S) to prevent it from falling off easily.

[0022] After the fabric 2 was reversed, the high temperature aging test at 95±2℃ and 3000H and the airbag detonation test verified that the upper pillar 1 in the embodiment of the utility model did not cause fragments to fly, which effectively improved the safety performance of the vehicle. In addition, it can be understood that the above-mentioned solution of reversed fabric for the easily broken area is also applicable to other fabric-wrapped components of the automobile.

[0023] This article uses specific examples to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present invention. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automobile upper pillar, characterized in that: The outer surface of the upper column is covered with cloth, and part of the cloth is wrapped along the edge of the upper column to the inner side of the upper column and at least covers the easily broken area of ​​the upper column.

2. The automobile upper pillar according to claim 1, characterized in that: The easily fractured area of ​​the upper pillar is verified by a safety airbag detonation experiment.

3. The automobile upper pillar according to claim 1, characterized in that: A plurality of reinforcing ribs are arranged on the inner side of the easily broken area of ​​the upper column.

4. The automobile upper pillar according to claim 3, characterized in that: The turned-up portion of the fabric is fixed to the reinforcing rib by welding.

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