Roof frame structure with single-layer and double-layer roof combination of two-stage stepper

Abstract

The invention relates to a second-level stepping vehicle top framework structure combining the single-layer top with the double-layer top. The structure comprises a first top framework area located in front of the center of a middle door and a second top framework area located behind the center of the middle door; the first top framework area is of a double-layer top structure, the portion, in a middle corridor area, of the second top framework area is of a single-layer top structure, the portions, on the two sides of the middle corridor area, of the second top framework area are of a double-layer top structure, and an air channel of the first top framework area and an air channel of the second top framework area are located in the same plane. According to the technical scheme, the center of the middle door serves as a boundary line, the first top framework area in front of the center of the middle door is designed to be of the double-layer top structure, the second top framework area behind the center of the middle door is designed to be of the structure combining the single-layer top with the double-layer top, the standing height space in a vehicle behind the middle door and the installing consistency of the air channels in the vehicle are guaranteed, the developing cost of interior molds is reduced, the developing cycle of the interior molds is shortened, and meanwhile the finished vehicle weight is reduced.

Description

technical field [0001] The invention relates to the field of passenger cars, in particular to a roof frame structure with a single-layer and double-layer roof combination for a two-stage stepper. Background technique [0002] At present, for gas-fired bus models with gas cylinders on top, it is necessary to use the space of the double roof to sink the gas cylinders. For the second-level scooters, in order to ensure the standing space behind the middle door, it is necessary to: Afterwards, it is designed into a single-layer roof structure. This design scheme requires the development of single-layer roof transition moldings. The mold development cost and cycle are longer, and there is a height drop after the decoration air duct is installed, and the mold development cost and cycle are longer; (2) The back of the middle door is designed as a double-layer roof structure. The standing height space of this design scheme is limited, and the frame is heavy. Contents of the inventi...

AI Technical Summary

Problems solved by technology

[0002] At present, for gas-fired bus models with gas cylinders on top, it is necessary to use the space of the double roof to sink the gas cylinders. For the second-level scooters, in order to ensure the standing space behind the middle door, it is necessary to: Later, it is designed into a single-layer roof structure. This design scheme requires the development of single-layer roof transition moldings. The mold development cost and cycle are longer, and there is a height drop after the decoration air duct is installed, and the mold development cost and cycle are longer; (2) The back of the middle door is designed as a double-layer roof structure. The standing height space of this design scheme is limited, and the frame is heavy

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