Eixo central superior esquerdo da sub-caixa: Desconstruindo 4 Peças críticas para um acionamento auxiliar impecável

Welcome to this specialized technical analysis of the Eixo central superior esquerdo da sub-caixa, a critical component within the CA10TA160M 10-speed transmission. This component is essential for the FAW Jiefang CA3250P66K2L1T1E 6×4 caminhão despejando. Este guia desconstrói o 4 componentes que formam o completo Eixo central superior esquerdo da sub-caixa assembly for professional service.

O Eixo central superior esquerdo da sub-caixa is a high-torque countershaft, ou “layshaft,” for the auxiliary (Hi/Lo range) section of the gearbox. Its logic is to receive power from the main box and transmit it to the final output gears, enabling the 10-speed “range split” function that is critical for a heavy-duty dump truck.

Essencial 1: O “Haste & Engrenagem de acionamento” Lógica (The Core Assembly)

This component is the literal foundation of the Eixo central superior esquerdo da sub-caixa conjunto. É um único, integrated part that provides the “dirigir” for the auxiliary gearbox.

1. Componente: ‘Welded intermediate shaft assy – caixa auxiliar’ (1701515-A7G)
Esse (Comp. 4) is the core component. The name ‘Welded intermediate shaft assy’ (焊接中间轴总成) tells us exactly what it is. Este é o Eixo central superior esquerdo da sub-caixa em si, and it is a non-serviceable assembly, meaning the gear(é) are permanently welded to the shaft.

O Welded Logic is a design choice for extreme strength. Instead of using splines or keys that can shear under high torque, the manufacturer has welded the gear(é) directly to the shaft. This creates a single, solid piece of steel that can withstand the immense, low-speed torque multiplication of the dump truck’s range box.

O Countershaft Logic é a sua função. Esse Eixo central superior esquerdo da sub-caixa atua como o “countershaft” ou “layshaft” for the auxiliary gearbox. It receives power from the ‘Sub-Box Drive Gear’ (which is connected to the mainshaft) e, por sua vez, its gear(é) are in constant mesh with the Hi/Lo range gears on the final output shaft.

Esse Eixo central superior esquerdo da sub-caixa is one of several (Por exemplo, Esquerda Superior, Superior direito) that form a robust, power-splitting design. Esse “multi-countershaft” layout is the key to the CA10TA160M’s high torque capacity, as it distributes the load across multiple gear contact points instead of just one.

Essencial 2: O “Consequência & Apoiar” Lógica (O sistema de montagem)

This group represents the complete bearing assembly that supports the Eixo central superior esquerdo da sub-caixa. A “soldado” shaft like this requires a bearing system that can handle immense, multi-directional forces.

1. Componente: ‘Tapered roller bearing outer ring’ (306/42-1-1) – Quantidade 2
Esse (Comp. 1) é o “xícara” ou “outer race” of the bearing. Two of these are used, one for the front bearing and one for the rear. This cup is precision-machined and is pressed *into the bore* of the auxiliary gearbox housing, where it remains stationary.

2. Componente: ‘Tapered roller bearing inner ring’ (306/42-1-2) – Quantidade 2
Esse (Comp. 2) é o “cone” ou “inner ring” of the bearing, which includes the tapered rollers in their cage. This cone is pressed *onto the journals* (termina) do Eixo central superior esquerdo da sub-caixa (Comp. 4) and spins with it.

O Lógica de rolo cônico is the most important concept for this Eixo central superior esquerdo da sub-caixa. Unlike a simple ball bearing (which handles radial loads well) or a thrust washer (which handles axial loads well), a tapered roller bearing is specifically designed to handle *both* massive radial loads (o “empurrando” force from the gear mesh) and massive *axial* loads (o “impulso” force generated by helical-cut gears) *at the same time*.

O Opposed Mounting Logic is how they work. The two tapered bearings (Comp. 1 + Comp. 2) are mounted in “opposition” at the front and rear of the Eixo central superior esquerdo da sub-caixa. This creates an extremely rigid assembly that can support the shaft against thrust forces in *both* directions (fore and aft), ensuring perfect gear mesh alignment under all load conditions.

O Lógica de serviço is why they are listed as separate inner and outer rings. Eles são um “matched set” and must be replaced as one. A technician presses the outer rings into the housing and the inner rings onto the Eixo central superior esquerdo da sub-caixa before final assembly.

Essencial 3: O “Pre-load & Posicionamento” Lógica (The Shim)

This final component is one of the most critical parts of the entire Eixo central superior esquerdo da sub-caixa conjunto. It is a single washer that ensures the longevity of the expensive bearings and shaft.

1. Componente: ‘Arruela de posicionamento’ (1701518-A7G)
Esse (Comp. 3) is the ‘Positioning washer’. In a tapered roller bearing application, this is not a simple washer; é um “shim” ou “gasket-shim.” Its thickness is precisely controlled, and its function is to set the “bearing pre-load.”

O Pre-load Logic is a high-precision assembly task. Tapered roller bearings cannot be “solto” (with end play), nor can they be “too tight.” They require a specific, slight amount of “espremer” ou “pré-carregamento” to function correctly.

During assembly of the Eixo central superior esquerdo da sub-caixa, a technician installs the components and measures the “fim do jogo” (the in-and-out movement) with a dial indicator. They then select a ‘Positioning washer’ (Comp. 3) of the *exact* thickness required to eliminate that end play and add the correct, specified pre-load (Por exemplo, 0.05milímetros).

This washer is often placed between a bearing’s outer ring (Comp. 1) and the housing or bearing cover. Its thickness is the only thing that guarantees the correct pre-load.

A Eixo central superior esquerdo da sub-caixa with incorrect pre-load (Por exemplo, a shim that is too thick or too thin) will suffer catastrophic bearing failure in a very short time. Too tight, and the bearings will overheat and seize. Too loose, and the shaft will “andar” axialmente, causing the gear teeth to misalign and destroying both the shaft (Comp. 4) and the gears it meshes with. Portanto, this ‘Positioning washer’ (Comp. 3) é um componente crítico.

Eixo central superior esquerdo da sub-caixa: Análise completa em 4 partes

A tabela a seguir fornece o completo, detalhamento de todos 4 tipos de componentes no Eixo central superior esquerdo da sub-caixa montagem para o FAW Jiefang CA3250P66K2L1T1E 6×4 caminhão despejando.

Especificações principais

As especificações para o Eixo central superior esquerdo da sub-caixa are defined by its role as a high-load, high-precision countershaft for the auxiliary gearbox.