The main function of the Ball Joint is to realize theupper and lower bounce and turn motion of the wheel.
There are two kinds of main structure ofthe ball joint: one is spherical joint combined with the whole joint, the otheris a hemispherical joint combined. Before using helical spring structure preloadingand wear compensation, now what is widely used is elastic and lubricationsynthetic resin tee which can reduce the cost and improve the maneuverabilityand stability. In addition, the material and shape of the dust cover, oil typehas greatly improved, cancel the grease nozzle,of free maintenance.
Ball joint is mainly composed of an endcover, ball pin, tee and dust cover form.
Due to the size and type of the spatialarrangement of the Control Arm, ball joint is connected with the control arm isas follows, bolt or rivet connection, directly pressed into the control arm andthe control arm as one. From the ball head pin development trend, now more andmore with the control arm as a whole the fixed ball pin, to meet the needs ofsmall space occupation, convenient loading and low cost requirements. But thetype of ball head pin of the service life of the demand is higher, so as toavoid the abrasion of the ball head pin or a failure. The whole control arm andthe steering knuckle ball pin connection adopt 1/6~1/10 taper fitting manner.
It should have sufficient swing angle, inorder to meet the requirements of wheel jumping up and down; small frictionmoment is to ensure that the steering important factors and easy manipulation;should not be caused by clearance of wheel shimmy and abnormal noise; goodsealing performance, to ensure that the ball head pin can be used in water andlow temperature environment should have the strength and durability; enough towithstand the force and vibration, the wheel came.
For independent suspension front and rearsuspension of the ball head pin is an important safety component protection,must be used to ensure the quality of the production process.
1)Attention to the full joint. For hotforging, cold forging, pressing or casting method for manufacturing blank, thencutting. Control of materials and heat treatment is a key factor.
(2) Ball pin machining way for cold forgingproducts is the mainstream. In the heat treatment of the material control isthe key factor, in addition to the products of conical connection type, itssize accuracy is the key factor of stable fatigue limit, need to take measuresin size control of cold forging;
(3) Polyacrylate and polyester elastomersynthetic resin material structure with elastic effect to become themainstream. In this structure, need tee shape, material design measures, toensure the production of stable precision molding in the mold, making the fineThe degree of control is the key factor.
(4) The structure of ball joint assembly,assembly methods are different, but most of the rolling wheel is the main way.As to prevent the process of different products, bad products, assembly errorand so on, take corresponding measures to prevent mistakes, also used to checkthe torque. Shake angle digital inspection machine, and combining them togetherto set in the procedure.