What Are the Components of the Fifth Wheel Structure?

The fifth wheel is a load-carrying part used by a cargo tractor to tow a semi-trailer, and belongs to the chassis parts. The fifth wheel has the function of engaging and locking with the traction pin of the semi-trailer through the locking mechanism, and the device that can transmit the horizontal force and the vertical force between the semi-trailer tractor and the semi-trailer is called the traction seat.

• What are the components of the fifth wheel structure?

• How to adjust the clearance of fifth wheel?

• How is the fifth wheel inspected?

What are the components of the fifth wheel structure?

The fifth wheel is a pulling member used by a cargo tractor to pull a semi-trailer. It is mainly composed of seat cover, saddle base and locking mechanism. The two tails of the seat cover are in the shape of large circular arcs, and there is a butterfly-shaped concave surface in the middle, which divides the plane into 5 parts of similar size. They are all pressed by a hydraulic press as a whole.

The fifth wheel can be divided into fixed type, mobile type and lift type according to whether its support can move. The left and right supports of the fixed traction seat are fastened on the base of the traction seat by bolts, and the base of the traction seat is then fixed to the beam of the tractor. Fixed is the most widely used one. There are many styles of mobile traction seats, and the structure is almost the same as that of fixed ones.

How to adjust the clearance of fifth wheel?

1. If the gap is too large, the anti-wear block can be replaced. If the anti-wear block is replaced or the frame moves, it should be that the screws on the anti-wear block are not tight, then the anti-wear block can only be welded directly on the saddle seat and then polished. draw.

2. Take it off and hang it to see, sometimes the crescent of the fifth wheel is loose, if not, screw out the screw that faces out of the traction seat.

3. There are four hexagon socket screws on the crescent. Tighten it to the end and loosen a quarter of the buckle.

How is the fifth wheel inspected?

Routine inspection of fifth wheel every week or before every shipment (operated by the user) Every week or before every shipment (whichever occurs first), the following safety inspections must be performed, check the tire pressure, adjust to the tire manufacturer Check the tightness of the tire screws, check the brake system for air leakage, test whether the brake can be braked, and check the tightness of all nuts, screws and bolts of the suspension. Check tractor and semi-trailer brake connections, drain air reservoirs and air chambers equipped with air suspension, check all lights, check and make sure outriggers are working properly, and check for wear on moving parts.

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