A maintenance window structure, for a large vehicle configured in a chassis frame that accommodates driving components of a large vehicle, includes: at least one main opening configured to communicate with a receiving space of the chassis frame and formed on a window frame; the window frame mounted on the chassis frame; a pillar frame detachably provided on the window frame and configured to partition the at least one main opening into a plurality of inspection openings, and an inspection cover that is configured to engage with the window frame and the pillar frame and to cover the plurality of inspection openings.

A maintenance window structure, for a large vehicle configured in a chassis frame that accommodates driving components of a large vehicle, includes: at least one main opening configured to communicate with a receiving space of the chassis frame and formed on a window frame; the window frame mounted on the chassis frame; a pillar frame detachably provided on the window frame and configured to partition the at least one main opening into a plurality of inspection openings, and an inspection cover that is configured to engage with the window frame and the pillar frame and to cover the plurality of inspection openings.

Provided are a system and a method for assembling a double-deck vehicle body. The system includes a vehicle body chassis support and an upper floor support. The vehicle body chassis support includes a crossbeam, end supports, and an intermediate support, where the end supports are arranged separately at two ends of the crossbeam, the intermediate support is arranged at the middle of the crossbeam, a height of the end supports is greater than a height of the intermediate support, an upper surface of the end supports and an upper surface of the intermediate support are configured to be closely fitted to a lower surface of a vehicle body chassis; and the upper floor support is detachably arranged on a vehicle body chassis for supporting an upper floor of the vehicle body.

Provided are a system and a method for assembling a double-deck vehicle body. The system includes a vehicle body chassis support and an upper floor support. The vehicle body chassis support includes a crossbeam, end supports, and an intermediate support, where the end supports are arranged separately at two ends of the crossbeam, the intermediate support is arranged at the middle of the crossbeam, a height of the end supports is greater than a height of the intermediate support, an upper surface of the end supports and an upper surface of the intermediate support are configured to be closely fitted to a lower surface of a vehicle body chassis; and the upper floor support is detachably arranged on a vehicle body chassis for supporting an upper floor of the vehicle body.

A frame structure of a commercial vehicle having an independent suspension system may include: a front outrigger mounted at lower front ends of wheel housings along a wide direction of a vehicle; a rear outrigger mounted at lower rear ends of the wheel housings along the width direction, wherein the wheel housings are arranged between the front and rear outriggers in a vehicle body length direction; a center reinforce unit mounted on an inner lower side of the wheel housing and disposed between the wheel housings, the center reinforce unit configured to connect the front and rear outriggers along the vehicle body length direction; a side reinforce unit mounted on an inner side of the wheel housing and connected to the center reinforce unit; and a lower reinforce unit configured to be connected to the center reinforce unit and coupled to the first suspension mounting assembly through the rear outrigger.

A frame structure of a commercial vehicle having an independent suspension system may include: a front outrigger mounted at lower front ends of wheel housings along a wide direction of a vehicle; a rear outrigger mounted at lower rear ends of the wheel housings along the width direction, wherein the wheel housings are arranged between the front and rear outriggers in a vehicle body length direction; a center reinforce unit mounted on an inner lower side of the wheel housing and disposed between the wheel housings, the center reinforce unit configured to connect the front and rear outriggers along the vehicle body length direction; a side reinforce unit mounted on an inner side of the wheel housing and connected to the center reinforce unit; and a lower reinforce unit configured to be connected to the center reinforce unit and coupled to the first suspension mounting assembly through the rear outrigger.

A frame structure of a commercial vehicle having an independent suspension system may include: a front outrigger mounted at lower front ends of wheel housings along a wide direction of a vehicle; a rear outrigger mounted at lower rear ends of the wheel housings along the width direction, wherein the wheel housings are arranged between the front and rear outriggers in a vehicle body length direction; a center reinforce unit mounted on an inner lower side of the wheel housing and disposed between the wheel housings, the center reinforce unit configured to connect the front and rear outriggers along the vehicle body length direction; a side reinforce unit mounted on an inner side of the wheel housing and connected to the center reinforce unit; and a lower reinforce unit configured to be connected to the center reinforce unit and coupled to the first suspension mounting assembly through the rear outrigger.

A frame structure of a commercial vehicle having an independent suspension system may include: a front outrigger mounted at lower front ends of wheel housings along a wide direction of a vehicle; a rear outrigger mounted at lower rear ends of the wheel housings along the width direction, wherein the wheel housings are arranged between the front and rear outriggers in a vehicle body length direction; a center reinforce unit mounted on an inner lower side of the wheel housing and disposed between the wheel housings, the center reinforce unit configured to connect the front and rear outriggers along the vehicle body length direction; a side reinforce unit mounted on an inner side of the wheel housing and connected to the center reinforce unit; and a lower reinforce unit configured to be connected to the center reinforce unit and coupled to the first suspension mounting assembly through the rear outrigger.

An autonomous dining vehicle characterized as a mobile restaurant, bar or a limousine comprising a lower floor, an upper floor connected by multiple steps, a kitchen area for cooking meals all made on the lower floor, a consumption area including tables and seating on the lower and upper floors, at least one restroom, door and a ramp for access. A driver may provide manual driving or a driver operating from a control center systematically provides autonomous driving to autonomously control steering and propulsion said wheel-set.

Provided are a system and a method for assembling a double-deck vehicle body. The system includes a vehicle body chassis support and an upper floor support. The vehicle body chassis support includes a crossbeam, end supports, and an intermediate support, where the end supports are arranged separately at two ends of the crossbeam, the intermediate support is arranged at the middle of the crossbeam, a height of the end supports is greater than a height of the intermediate support, an upper surface of the end supports and an upper surface of the intermediate support are configured to be closely fitted to a lower surface of a vehicle body chassis; and the upper floor support is detachably arranged on a vehicle body chassis for supporting an upper floor of the vehicle body.