Steering Knuckle Assembly for FAW Jiefang Truck Spare Parts 3001015-363

Steering Knuckle Assembly for FAW Jiefang Truck Spare Parts 3001015-363

The function of the steering knuckle is to transmit and bear the load on the front of the car, support and drive the front wheel to rotate around the kingpin to turn the car. When the car is driving, it is subject to variable impact loads. Therefore, the steering knuckle is an important safety component of the car, and industry professionals around the world attach great importance to its safety features.

Working principle of steering knuckle assembly:

1. Kingpin inclination angle

The function of the kingpin inclination angle is to make the wheel automatically return to the right alignment. Usually the wheel axis is not on the horizontal plane. For convenience of explanation, it is assumed that the wheel axis is on the horizontal plane when driving straight. When the car is traveling in a straight line, the intersection angle between the wheel axis and the kingpin is exactly this maximum value.

The angle between the wheel axis and the kingpin remains unchanged during the steering process. When the wheel turns an angle, the wheel axis tilts downward away from the horizontal plane, causing the vehicle body to lift up and the potential energy to increase. In this way, the gravity of the car itself has the effect of returning the steering wheel to its original middle position. When the car is parked horizontally, in the transverse vertical plane of the car, the angle between the kingpin axis and the vertical line on the ground is the kingpin inclination angle.

2. Front wheel camber angle

If the wheels are installed just perpendicular to the road surface when the vehicle is empty, the wheels may incline due to load deformation of the axle when the vehicle is fully loaded, which will accelerate tire wear. In addition, the vertical reaction force of the road surface on the wheel along the axial direction of the wheel hub will cause the wheel hub to press against the small bearing at the outer end, increasing the load on the small outer bearing and the hub fastening nut and reducing their service life. However, the camber angle should not be too large, otherwise it will cause uneven tire wear. As shown in the picture on the left, when the car is parked horizontally, in the transverse vertical plane of the car, the angle between the wheel plane and the vertical line on the ground is the front wheel camber angle.

3. Front wheel toe-in

When a wheel has a camber angle, it acts like a rolling cone when rolling, causing the wheels on both sides to roll outward. Since the steering tie rod and the axle are restrained so that the wheel does not roll outward, the wheel will slide inward while rolling on the ground, thereby increasing tire wear. In order to avoid this adverse consequence caused by the conical rolling effect, the two front wheels are properly deflected inward, which forms front wheel toe-in.

Basic Info.

Introduction to the advantages of steering knuckle:

(1) The blank is made of 42CrMo alloy, which has high strength, good toughness, is not easy to break, and has better fatigue resistance.

(2) Through forging, defects such as looseness in the cast state produced during the smelting process of the blank are eliminated, the microstructure structure is optimized, and the complete metal streamlines are preserved, greatly improving the mechanical performance of the steering knuckle.

(3) Introduce a fully automatic production line (including equipment system, robot system, tool system, fixture system and online detection system), and strictly control dimensional accuracy and position accuracy to ensure 100% product qualification rate.

(4) The shaft is strengthened to improve the fatigue life of the steering knuckle, and rolling and medium-frequency quenching processes are used to eliminate residual compressive stress on the surface and improve the fatigue strength of the product.

(5) Press-fit composite metal steel backing sleeve to protect the steering knuckle pin and increase the service life of the steering knuckle.

Branded packaging and integrated foam can well protect the integrity of product packaging during transportation.

quality assurance:

Vertical lathe machining center - CNC center - Boring machining center - High-precision grinder - Metallographic inspection - Automated three-coordinate inspection

Q1. What is your terms of packing?

We have branded packaging and neutral packaging, and we can also do what you want with authorization. This is flexible.

Q2. What is your sample policy?

We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost.

Q3. What are your brand agency conditions and advantages?

After we sign an agent in one city, we will not sign a second company to protect the agent's brand advantage and price advantage. And we will help the agent develop customers and solve all kinds of difficult and miscellaneous problems about products.

Q4. How to guarantee your after-sales service?

Strict inspection during production, Strictly check the products before shipment to ensure our packaging in good condition. Track and receive feedback from customer regularly. Our products warranty is 365 days.

Each product provides quality assurance service. If there is a problem with the product within the warranty period, the customer can negotiate with us in detail about the related claims, and we will do our best to satisfy the customer.

Q5. How do you make our business long-term and good relationship?

We keep good quality and competitive price to ensure our customers benefit ;

We respect every customer as our friend and we sincerely do business and make friends with them, no matter who they are.

Q6. What is your terms of payment?

By TT or LC. We'll show you the photos of the products and packages before you pay the balance.

T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance.

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