CN207128816U - A kind of automobile shank beam - Google Patents

Abstract

The utility model relates to a lower leg beam of an automobile, which is installed at the front lower end of the automobile, and comprises a beam and a symmetrical energy-absorbing box connected to both ends of the beam. The energy-absorbing box is composed of a front energy-absorbing box and a rear energy-absorbing box. The energy box and the rear energy-absorbing box are injection molded separately, and then connected by hot plate welding or vibration friction welding, and the interior of the energy-absorbing box is provided with a honeycomb structure. Compared with the prior art, the crossbeam of the utility model is stamped with aluminum material, the energy-absorbing box is formed by plastic injection molding, the crossbeam and the energy-absorbing box are riveted or connected, and the lower leg beam assembly is connected with the longitudinal beam of the front body by bolts. Less processing steps, light weight of finished products, lower product processing costs, improve processing and production efficiency, the interior of the energy-absorbing box is equipped with a honeycomb structure, which reduces the weight of the energy-absorbing box and improves the energy-absorbing and cushioning performance during collisions, thus bringing more effective protection.

Description

A car shank beam

technical field

The utility model relates to the technical field of automobile manufacturing, in particular to an automobile lower leg beam.

Background technique

With the development of automobile technology and the improvement of people's safety awareness, the protection of automobiles is no longer limited to the protection of passengers in the car, but has been extended to pedestrians who collide with the car. When a car collides with pedestrians, usually the body directly Contact with the pedestrian's calf, thus directly causing injury to the pedestrian's calf. When a car collides with a pedestrian, the pedestrian's calf will be injured first, and the degree of injury to the pedestrian's calf will further affect the further injury to the pedestrian after he cannot stand or falls due to the injured calf. The car shank beam is installed in the front of the car, which can effectively protect pedestrians during low-speed collisions, prevent pedestrians from suffering serious personal injuries, and play a certain role in protecting important parts in the front cabin of the car.

However, at present, the lower leg beams of automobiles are mostly steel structures. The beams are extruded steel beams. The cross-section is mainly rectangular. The material of the energy-absorbing box is (high-strength) steel. The installation base is stamped separately, punched and formed, and finally the energy-absorbing box, the beam, and the installation base are welded and connected respectively. The processing procedure of the automobile calf beam is relatively complicated. The beam process includes extrusion, stretch bending, and the energy-absorbing box process includes stamping and welding. The base process includes stamping and punching. The welding of the energy-absorbing box and the base makes the processing cost of the lower leg beam higher, and because the materials are all made of high-strength steel, the weight of the final product is relatively heavy, which cannot form an effective cushion. At the same time, it has long relied on high-strength steel.

Utility model content

The purpose of this utility model is to provide a car shank girder in order to solve the above problems. On the premise of satisfying the function of the anti-collision protection system, its weight and cost are effectively optimized.

The purpose of this utility model is achieved through the following technical solutions:

An automobile lower leg beam, installed at the front lower end of the automobile, including a crossbeam and a symmetrical energy-absorbing box connected to both ends of the crossbeam. The energy-absorbing box is composed of a front energy-absorbing box and a rear energy-absorbing box. The energy-absorbing box There is a honeycomb structure inside. In order to improve the strength of the calf beam and good energy absorption effect, the material of the energy-absorbing box is PP-30TD%.

The honeycomb structure includes a plurality of hexagonal holes, and the distance between the sides of the hexagons is 9-11mm.

The front energy-absorbing box and the rear energy-absorbing box are respectively integrally injection-molded by plastic, and then connected by hot plate welding or vibration friction welding.

The shape of the front and rear crash boxes is square.

The top of the front crash box is provided with a through hole riveted with the beam.

The lower part of the rear energy-absorbing box is provided with a base, and the base is provided with a through hole connected with the vehicle body through bolts.

The beam is a circular arc beam stamped from aluminum, including the middle beam section and the side beam sections at both ends. In order to meet the CNCAP-5 star collision requirements, the aluminum alloy material of the anti-collision beam is mainly zinc-based 7-series high-strength Aluminum alloy, such as 7075-6T.

Compared with the prior art, the beam of the utility model is punched by aluminum material, the energy-absorbing box is molded by plastic injection molding, the components are connected by riveting or bolts, the processing steps are less, the weight of the finished product is light, the processing cost of the product is reduced, and the processing efficiency is improved. Productivity. The interior of the energy-absorbing box is equipped with a honeycomb structure, which can reduce the weight of the energy-absorbing box and improve the energy-absorbing and cushioning performance during collisions, reduce excessive dependence on high-strength steel, reduce the increase in defect rate caused by complex manufacturing processes, and avoid The failure caused by the steel corrosion of the lower leg beam makes the vehicle lighter, reduces the environmental pollution caused by carbon emissions, improves production efficiency and saves the cost of the vehicle, and effectively reduces the damage to pedestrians. It is important to protect the front cabin together with the front anti-collision beam. Components are protected from damage, resulting in more effective protection.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a structural schematic diagram of an energy-absorbing box;

Fig. 3 is the structural representation of beam;

Fig. 4 is the assembly schematic diagram of the present utility model;

In the figure: 1-beam; 2-crash box; 3-front crash box; 4-rear crash box; 5-rivet; 6-bolt.

Detailed ways

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Example 1

An automobile calf beam, as shown in Figure 1-4, includes two parts, the energy-absorbing box 2 and the beam 1, the main structural section of the energy-absorbing box 2 is a honeycomb structure, and each crest forms a regular hexagon, six The side-to-side distance of the polygon is 10mm. The energy-absorbing box 2 is composed of front and rear parts. The interior of the front energy-absorbing box 3 is a honeycomb structure, and the external shape is rectangular. There are four crossbeams on the top of the front energy-absorbing box 3. The through hole for riveting the rivet 5; the interior of the rear energy-absorbing box 4 is a honeycomb structure, and the outer contour is rectangular. 6 connections. The crossbeam 1 is stamped from aluminum, the middle surface has a large curvature to obtain sufficient rigidity, and the two sides have a small curvature and are respectively provided with 4 installation through holes for connecting with the left and right crash boxes. The material of the energy-absorbing box 2 is plastic injection molding, with less processing steps and light weight of the finished product, which reduces the product processing cost and improves the processing and production efficiency. Excellent energy absorption and cushioning properties, resulting in more effective protection.

Claims (7)

1. a kind of automobile shank beam, installed in the preceding lower end of automobile, including crossbeam and crossbeam both ends and symmetrical are connected to Energy-absorption box, it is characterised in that described energy-absorption box is made up of preceding energy-absorption box and rear energy-absorption box, is provided with inside energy-absorption box cellular Structure.

2. a kind of automobile shank beam according to claim 1, it is characterised in that described alveolate texture includes multiple six Side shape hole, hexagon opposite side are 9-11mm apart from size.

3. a kind of automobile shank beam according to claim 1, it is characterised in that described preceding energy-absorption box and rear energy-absorption box point Not by plastics integrated injection molding, then using hot plate welding or vibrations friction welding (FW) connection.

4. a kind of automobile shank beam according to claim 3, it is characterised in that outside described preceding energy-absorption box and rear energy-absorption box Shape is square.

A kind of 5. automobile shank beam according to claim 3, it is characterised in that the top of described preceding energy-absorption box be provided with The through hole of riveting transverse beam.

6. a kind of automobile shank beam according to claim 3, it is characterised in that described rear energy-absorption box bottom is provided with bottom Seat, base are provided with the through hole being bolted with car body.

7. a kind of automobile shank beam according to claim 1, it is characterised in that described crossbeam is the circular arc of aluminium punching press Crossbeam, including intermediate transverse girder section and the side bar section at both ends.