Technical target parameters of torsion bar spring design

[guide] technical target parameters of torsion bar spring design.

The technical target of torsion bar spring generally includes the following contents.

(1) The utility model can overcome the gravity of the luggage compartment lid by using the elastic force generated by the torsion of the torsion bar spring during the movement of the luggage compartment lid, and slow down the lifting operation force and the closing impact force.

(2) The torsion bar spring must be able to meet the requirements of 20000 times of fatigue and durable use of trunk lid.

   

(3) The torsion bar spring shall meet the opening requirements of the trunk lid: ① after the opening device is activated, it can make the trunk lid automatically spring up to a certain height and keep still, which is convenient for manual operation; ② it can make the trunk lid in the half open state (with a certain opening angle) keep still; ③ it can make the trunk lid stay in the full open position.

(4) The torsion bar spring shall meet the use requirements of operation force, so that the operation force of trunk lid closing and opening can be maintained at a level that customers feel comfortable with, in which the closing operation force is 30-50n, and the opening operation force is 10-20n.

(5) The torsion bar spring shall meet the requirements of wind resistance: make the trunk lid have enough holding force when it is in the maximum open position, so as to avoid accidents caused by the trunk lid falling and closing by itself under the action of wind.

(6) The torsion bar spring shall meet the function of parking on the slope: when the trunk lid is opened when the whole vehicle stops on the 10% (5.75 °) uphill road (head up), it can still keep the trunk lid open.

(7) The torsion bar spring shall meet the requirements of spatial arrangement: when the trunk lid is in the process of opening or closing movement (including the situation of over opening or over closing), a certain safety clearance shall be maintained with the surrounding body structure without interference.