Since the launch of Buick Angkewei on 20 14, the sales volume of Buick Angkewei has maintained a leading position in the market with its smooth appearance and luxurious interior design. According to relevant data, in the first half of this year, Buick Angkewei sold 1 12900 vehicles in China, ranking seventh in the SUV model list. However, for a period of time, there have been many incidents about the out-of-stock control arm of the front suspension of Angkor models in many parts of the country, which have aroused widespread concern from all walks of life.
According to the situation reflected by the owner involved, the problem began to appear in Angkewei on 20 15. In August of 20 15, a car owner in Hubei broke the left front wheel while driving Angkewei, which subsequently caused the vehicle to lose control and seriously damaged the body. On August 20 16, a car owner in Jiangsu had a slight collision with other vehicles, and the suspension of the vehicle was broken. At this time, the vehicle has been purchased for less than two months, and the mileage is 1400 km.
As shown in the figure, the problem occurred at the front suspension control arm of Angkor. Friends who know something about automobiles know that in the suspension system, the control arm bushing is a transition piece used to connect the chassis control arm and the body. When working, the two ends of the control arm bushing are connected with the subframe through bolts, which plays a role in buffering the impact of the road surface on the car body. However, if the control arm and sub-frame are out of stock due to the bushing assembly, the vehicle will easily get out of control and have an accident at high speed, and the safety risk is great.
It is understood that in 2011month of 2003, Shanghai General Motors Co., Ltd. (now SAIC-GM) and Pan Asia Automotive Technology Center Co., Ltd. jointly applied for "a bushing assembly connecting the control arm and the subframe" (patent application No.201320764/KLOC-0
7) In this patent, a bushing assembly with a control arm sleeve, a rubber bushing and two connectors is disclosed. Compared with the traditional way, its advantages are described as "optimizing the structure of the bushing assembly, eliminating the bracket, reducing the overall weight of the product and saving the cost".
10 1- pin1; 102- sleeve; 103- rubber lining; 104- inner bushing; 105- Pin 2 split control arm bushing Since then, SAIC-GM and Pan Asia Automotive Technology Center Co., Ltd. jointly applied for an integrated control arm bushing (patent application No.20 1520656344.
8) patents. In the patent text, the description of the separated structure is that "the connection is unstable and there are great security risks." When the car moves forward, the separated dog bone bushing is stressed in the direction of the car, and the car body is in danger of falling out of the bushing and failing; During emergency braking, the separated dog-bone bushing will be impacted by huge axial load, and it will also come out, resulting in the bad consequences of control arm fracture and failure. "
10 1- ontology; 102- outer sleeve; 103- Li Ning; 104- bolt hole; 105- Boss integrated control arm bushing In view of the shortage of front suspension control arm in some models of Angkor, the defective product management center of AQSIQ (now the defective product management center of the State Administration of Market Supervision) has organized experts to carry out investigation and research, and said in the expert opinion of the second defective technical consultation meeting on 20 17, "I don't think that the shortage of front suspension control arm is related to vehicle collision. At present, there is no shortage of control arm under non-collision conditions. Because of the shortage of goods, the vehicle will be out of control and there will be safety hazards. Therefore, the guidance of "it is recommended to inform manufacturers to conduct investigation and analysis" is made.
(Photo/Text/Photo: Pacific Auto Network Q&A called Beast)