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Semi Truck Fifth Wheel

20+ Years of experiences (since 2005)

Implementing IATF 16949-2016
Implementing ISO 9001-2015
Quality testing by an independent laboratory
Warranty: 18 months since shipping date
Unique lock-jaw/bar design: Easy & Safe locking
Stamped plate with Fabricated frame: Robust & Reliable
Technical standards: GB/T 31879-2015, GB/T 4606, GB/T 4607
Sales volume (units）: 50,000+ per year

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The semi truck fifth wheel, also known simply as the fifth wheel, is a crucial component of a semi truck that allows it to couple with a trailer. Here's a breakdown of its key features and function:

Function: The fifth wheel provides the coupling mechanism between the semi truck (tractor) and the trailer. It allows for articulation and movement between the tractor and the trailer while providing a secure connection.
Design: It consists of a large metal plate mounted horizontally on the tractor chassis, with a locking mechanism to hold the kingpin of the trailer in place. The kingpin is a cylindrical steel pin on the trailer that fits into the jaws of the fifth wheel.
Locking Mechanism: When a trailer is backed into the fifth wheel, the jaws of the fifth wheel automatically close around the trailer's kingpin. This locking mechanism ensures a secure attachment between the tractor and the trailer.
Articulation: The design of the fifth wheel allows for articulation in multiple directions, primarily for turning. This flexibility is essential for navigating corners and turns while maintaining stability between the tractor and trailer.
Maintenance: Regular inspection and maintenance of the fifth wheel are essential for safety and efficiency. This includes lubrication of moving parts and checking for wear and tear.
Types: There are various types of fifth wheels, including manual and automatic models. Automatic fifth wheels use hydraulics or pneumatics to engage and disengage, making coupling and uncoupling easier for drivers.
Safety Considerations: Proper operation of the fifth wheel is critical for safe driving. Ensuring the fifth wheel is securely locked before driving off prevents accidents caused by trailer detachment.

Overall, the fifth wheel is a fundamental part of a semi truck's equipment, enabling it to haul trailers safely and efficiently across long distances.

Semi Truck Fifth Wheel

The fifth wheel on a semi-truck is a crucial component that allows it to connect to and tow a trailer. Here’s a detailed look at its application and significance:

Function of the Fifth Wheel:

Connection Point: It provides a secure coupling between the tractor (semi-truck) and the trailer. This connection allows for articulation and movement between the two vehicles.
Weight Distribution: The fifth wheel helps distribute the weight of the trailer across the tractor's frame and axle, ensuring stability and balance during towing.
Articulation: It allows for the necessary articulation between the tractor and trailer, facilitating turning movements without causing undue stress on either vehicle.

Components:

Upper Coupler: Mounted on the trailer, this part of the fifth wheel assembly is where the locking mechanism engages.
Lower Coupler: Mounted on the tractor, this part includes the locking mechanism that engages with the upper coupler.
Kingpin: A part of the trailer's structure that fits into the fifth wheel's locking mechanism, securing the trailer to the tractor.

Types of Fifth Wheels:

Sliding Fifth Wheels: Allows for adjustment of the distance between the tractor and trailer to optimize weight distribution and turning radius.
Fixed Fifth Wheels: Positioned at a fixed distance from the rear axle of the tractor, offering simplicity and stability.

Key Considerations:

Compatibility: Fifth wheels must be compatible with both the tractor and the trailer in terms of weight capacity and dimensions.
Maintenance: Regular inspection and lubrication are necessary to ensure the fifth wheel functions properly and safely.
Safety: Proper coupling and uncoupling procedures are critical to prevent accidents and ensure road safety.

Conclusion:

The fifth wheel is an integral part of a semi-truck's equipment, enabling it to efficiently haul trailers of various sizes and types. Its design and functionality play a crucial role in ensuring both the performance of the vehicle and the safety of its operation on the road.

Type	H	D-Value(KN)	Impose(kg)	Weight(kg)	Tilt Angle(U)	Total weight of outfit(kg)	Kingpin Size
XH-37C-150	150	152	20000	150	15°	65000	50mm
XH-37C-170	170	152	20000	155	15°	65000	50mm
XH-37C-185	185	152	20000	160	15°	65000	50mm
XH-37C-250	250	152	20000	175	15°	65000	50mm
XH-37C-300	300	152	20000	180	15°	65000	50mm
XH-38C-195	195	260	36000	228	15°	70000	90mm

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Semi Truck Fifth Wheel

Function of the Fifth Wheel:

Components:

Types of Fifth Wheels:

Key Considerations:

Conclusion:

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