QC/T 649-2013Motor vehicles - Steering control mechanisms - Performance requirements and test methods (English PDF)

3.1 Center of steering wheel

Fix the steering wheel on the steering shaft according to the loading method, and the center of the center circle of the steering wheel rim.

5.1.4 Torsion clearance of sliding spline

For the sliding spline structure, the twisting angle of the sliding spline is no greater than 25'.

5.2 Rotating torque

5.2.1 No-load rotating torque of steering column.

Rotating torque is no greater than 0.30 N*m; change rate of rotating torque, k, is no greater than 33.3%.

5.2.2 Change Rate of load rotating torque of steering column assembly.

The change rate of load rotating torque of steering column assembly, k, is no more than 20%.

5.3 Steering column adjustment characteristics

5.3.1 Angle adjustment force of steering column.

The angle adjustment force of steering column is no greater than 98N, and there is no abnormal feeling during operation.

5.3.2 Height adjustment force of steering column.

The height adjustment force of steering column is no greater than 160N, and there is no abnormal feeling during operation.

5.3.3 Angle adjustment and holding force of steering column.

The angle adjustment and holding force of steering column is no less than 490N.

5.3.4 Height adjustment and holding force of steering column.

The height adjustment and holding force of steering column is no less than 490N.

5.3.5 Operating force of the handle.

The operating force of the handle is in the range of 49N ~ 147N.

5.4 Rigidity

5.4.1 Vertical bending rigidity.

The amount of vertical bending deformation is no greater than 0.5mm.

5.4.2 Lateral bending rigidity.

5.9.5 Sliding spline wear test

The increase in clearance in the direction of rotation is no greater than 5'.

5.10 Vibration test

5.10.1 Vibration test.

There is no damage to each part; and the tightening bolts are not loose; and no abnormalities are allowed.

5.10.2 Resonant frequency.

The resonant frequency is no less than 35Hz.

5.11 Universal joint test

The performance requirements of the universal joint are implemented according to QC/T 647.

6.1 General

The symbols used in the test methods are instructed as follows: p - Force applied to the test sample during test, such as p1, p2, ...;

T - Torque applied to the test sample during the test, such as: T1, T2, ...;

F - Force generated by sample test results, such as: F1, F2, ...;

M - Torque generated by sample test results, such as M1, M2, ...;

theta1 - Angle between the steering column axis and horizontal line;

± - Refers to the application of force, torque, rotation angle, displacement direction, respectively.

6.2 Clearance measurement

6.2.1 Axial clearance.

Fix the steering column according to the loading method, see Figure 1. Apply axial force p1 = ±29.4N to the steering wheel side of the steering shaft; plot the relationship curve between the steering shaft axial force p1 and the axial clearance delta, see Figure 2. delta1 is the axial clearance.