ФАВ Рамка: Почему эти 14 Критические узлы определяют прочность грузовика

Добро пожаловать в это важное техническое руководство по ФАВ Рамка (Часть №. 2800010-96С). This is the absolute “backbone” of the entire FAW Jiefang CA4251P66K24T1A3E5 6×4 дизельный полуприцеп тягач. This is not just a component; it is the structural foundation upon which every other system is built, from the engine and cab to the suspension and fifth-wheel.

The ФАВ Рамка это сверхмощный, high-tensile steel “ladder frame.” Его “логика” is to provide immense longitudinal strength (to support weight) and controlled torsional rigidity (to resist twisting). This assembly must handle the entire payload of the trailer, the torque of the engine, and the constant, violent shocks from the road.

This in-depth guide is an essential resource for chassis technicians, менеджеры автопарка, and body builders. Мы разберем всю ФАВ Рамка сборка в свой 14 main component groups, including the main rails, crossmembers, suspension hangers, 5th wheel mounts, и критический “логика” of its rivet-and-bolt fastener system.

Core Structure: The “Лестничная рамка” (2800010-96С)

The ‘Frame & кронштейн в сборе’ (2800010-96С) это ФАВ Рамка сам. This is a classic “ladder frame” дизайн, which consists of two massive, parallel C-channel steel rails that run the entire length of the truck. Эти “side rails” are the main load-bearing members.

These two rails are connected by a series of lateral “crossmembers,” which form the “rungs” of the ladder. This parts list details the ‘Front crossmember assy’ (2801070-91Вт) and the ‘Middle crossmember assy’ (2801120-2000). This crossmember system is the core “логика” принадлежащий ФАВ Рамка. It provides the crucial **torsional rigidity**—the resistance to twisting.

When a 6×4 tractor articulates over uneven ground (НАПРИМЕР., one front wheel high, one rear wheel low), весь ФАВ Рамка is subjected to immense twisting forces. Without these crossmembers, the C-rails would twist like ribbons, leading to component failure and unstable handling. The ‘Strengthening plate-front crossmember’ (2801073-22А) provides additional reinforcement at a high-stress point, ensuring the front of the ФАВ Рамка can handle the forces from the engine and cab mounts.

Front-End Mounting Logic: Suspension and Recovery

The front section of the ФАВ Рамка is engineered as the mounting foundation for the entire front end of the truck. The ‘Front bracket-front steel plate spring’ (2902441-91Вт) is the heavy-duty “вешалка” that holds the front of the leaf spring suspension. This is a critical load point that transfers all road shocks into the ФАВ Рамка.

Сходным образом, the ‘Front shock absorber upper bracket’ (2905411-1086) это “shock tower” that anchors the top of the shock absorber. These mounting points must be perfectly located and incredibly strong.

This section also includes the ‘Towing pin seat’ (2806051-22А). This is the reinforced “гнездо” that accepts the truck’s heavy-duty tow pin. This component must be strong enough to withstand the entire weight of the truck being pulled. It is bolted directly to the ФАВ Рамка‘s front crossmember.

Rear Logic: 5th Wheel & Tandem Axle Mounts

The rear half of the ФАВ Рамка is designed to do the heavy work of a 6×4 трактор. The ‘Saddle base plate’ (2801213-52А), along with its ‘Left’ (2801211-2000) и «Правильно’ (2801212-2000) соединительные пластины, forms the mounting base for the **5th wheel** (а “saddle”). This is the platform that accepts the kingpin from the semi-trailer, transferring the trailer’s entire weight and pull-force directly to the ФАВ Рамка.

Just as important is the **tandem axle suspension**. The ‘Balance suspension hanger assy’ (2801170-2000) это “trunnion” mount. This is the central pivot point for the “walking beam” suspension that connects the two rear drive axles. Эта сборка, along with its various connection plates (2801173-2000, 2801174-2000, и т. д.), allows the two rear axles to “articulate” или “walk” over obstacles, ensuring all eight rear wheels remain in contact with the ground for maximum traction. This is the core “логика” of a 6×4 ФАВ Рамка.

The “Логика” of Fasteners: Rivets vs. Болты

The parts list for the ФАВ Рамка is dominated by a massive quantity of fasteners, and their “логика” имеет решающее значение. The list includes 30 rivets (‘Flat head rivet’ Q4501436 and ‘Round head rivet’ Q4501434) and well over 100 high-tensile bolts and lock nuts.

**Rivets:** The ‘Flat head rivets’ (平圆头铆钉) and ‘Round head rivets’ (半圆头铆钉) are used for **permanent, high-shear-strength connections**. These are used to attach the main structural crossmembers (like 2801070-91W) to the C-channel side rails. A rivet, when “hot-set,” fills the hole completely and provides a vibration-proof, легкий вес, and incredibly strong joint that is superior to a bolt in shear. Это “permanent” часть ФАВ Рамка.

**Болты & Lock Nuts:** The dozens of ‘Hex flange bolts’ (六角法兰面螺栓) and ‘Hex head flange lock nuts’ (六角头凸缘锁紧螺母) are used for components that are **serviceable** or **replaceable**. This includes all the suspension brackets (2902441-91Вт, 2801170-2000), the 5th wheel “saddle” монтируется (2801213-52А), and all the various plumbing and wiring brackets. The “фланец” и “lock nut” designs are essential for providing a high clamping force that will not vibrate loose over millions of miles. Этот “rivet vs. болт” strategy is the core assembly “логика” принадлежащий ФАВ Рамка.

FAW Frame Parts List (Marks 1-14)

В следующей таблице представлена ​​полная, подробная разбивка всех 14 component groups identified in the ‘Frame’ (499) схема трактора FAW CA4251P66K24T1A3E5. Этот ФАВ Рамка is the foundation of the entire vehicle.

Технические характеристики и контекст сборки

Технические характеристики ФАВ Рамка are defined by its function as the structural backbone of a heavy-duty 6×4 трактор. The ФАВ Рамка is engineered for maximum strength and durability using a combination of permanent and serviceable fasteners.