Design of backdoor

BACK DOOR:

Back door is mostly used to facilitate the access of the luggage compartment or boot space. These are designed with proper requirements for the gas stay, hinges and latch. Visibility criteria plays a important role here.

TYPES OF BACK DOOR:

• Top mounted: this is the most common type which is mounted with the hinges at the top. These are held by gas stay at its position.
• Side mounted: this is the type which is hinged to the sides. This type of door is mostly used in robustly designed vehicles which would carry a spare wheel mounted to the door.

DESIGN CONSIDERATIONS:

• Rear visibility criteria.
• Appropriate emboss directions.
• Placement of latch-striker as per trajectory.
• Fits and clearance.
• Boot space capacity.

The backdoor assembly basically consist of,

• Inner panel.
• Outer panel.
• Wiper motor reinforcements.
• Gas stay reinforcements.
• Hinge reinforcements.
• Latch and striker reinforcements.

Inner panel:

The inner panel is designed mimicking the curvature of the outer panel. They consist of various emboss and reinforcements. The emboss made in inner panel is also designed outwards in order to dissipate the energy during the collision. These are manufactured by deep drawing process.

Outer panel:

The outer panel tends to be the aesthetic part of the car. The panel should not contain any welds which would spoil the aesthetics of the car. Hence, the inner and outer panel are joined by the process of hemming. The necessary reinforcements are made and sealants are applied in order to focus on the reduction of rattling noise.

Wiper motor reinforcement:

It is the reinforcement given for the fixture of the wiper motor for the rear glass.

Gas stay reinforcements:

It is basically the reinforcements which is bolted with the gas stay, which holds up the door when it is in open condition.

Hinge reinforcements:

Latch and striker reinforcements:

These are made drafting the latch striker trajectory. A line is drawn between the hinge reinforcements. The line is drawn midst the line connecting the hinges. A circle is drawn which depicts the trajectory. Based on which the Placements of striker is decided.

hence, with the following considerations and needs the backdoor of the car is designed with NX.