caja power ship
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UNIDAD V
CAJA DE CAMBIOS POWERSHIFT
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Es un grupo reductor
mediante juego de
engranajes conasistencia hidráulica
para el
accionamiento de las
marchas o cambios
Funciones
CONCEPTO BÁSICO
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Transmitir potenciaAumentar o disminuir eltorqueAumentar o disminuir lasr.p.m.Permitir marchas deretrocesoPermitir las posiciones
neutrales
FUNCIONES
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TIPOS
•De EjesParalelos
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TIPOS
•De EjesColineales
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COMPONENTES PRINCIPALES
•Engranajes
•Ejes
•Embragues de discosmúltiples
•carcasa
•Sistema hidráulico de carga
•Sistema de Lubricación yrefrigeración
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EMBRAGUE DE DISCOS MÚLTIPLES
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EMBRAGUE DE DISCOS MÚLTIPLES
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RECORRIDO DE FUERZAS: 1F
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RECORRIDO DE FUERZAS: 2F
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RECORRIDO DE FUERZAS: 3F
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RECORRIDO DE FUERZAS: 4F
CARACTERÍSTICAS
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CARACTERÍSTICAS
Existen semiautomáticas yautomáticasHay de contraeje de de engranajesplanetariosLos embragues de discos múltiples
están ba ados y re!rigerados poraceiteLos embragues de discos múltiplesson acoplados hidráulicamente yseparados mecánicamente "porresortes#
CARACTERÍSTICAS
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CARACTERÍSTICAS
Los embragues de discosmúltiples están ba ados yre!rigerados por aceitePor ejemplo la caja Po$er%hi!t de un tractor sobreorugas tiene tres &elocidadeshacia delante y tres haciatras' entonces tiene cinco
paquetes de embragues dediscos múltiples
VENTAJAS
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VENTAJAS
(o es necesario desacoplarla potencia del motor hacia latransmisi)n para reali*ar loscambios
%uministra cambios rápidos ysua&es
%e distribuye la carga en máspuntos de contacto en elmecanismo planetario