Lub excavator yog lub tshuab loj loj, siv lub tshuab siv hluav taws xob siv hluav taws xob tsim rau kev khawb tawm lub ntiaj teb nrog nws lub thoob los tsim cov trench, qhov thiab cov hauv paus.Nws yog ib qho tseem ceeb ntawm cov chaw ua haujlwm loj.

Excavators yog tsim los tswj ntau hom kev ua haujlwm;yog li, lawv tuaj nyob rau hauv ntau qhov ntau thiab tsawg.Cov hom excavator feem ntau yog crawlers, dragline excavators, suction excavators, skid steer, thiab ntev ncav cuag excavators.

Excavators siv ntau yam hydraulic txuas uas ua haujlwm sib txawv.Ntxiv nrog rau lub thoob, lwm yam kev sib txuas muaj xws li auger, breaker, grapple, auger, teeb, thiab ceev coupler, feem ntau ntshuam qhov chaw yog slewing bearing.

Lub excavator tuaj yeem tig sab laug thiab sab xis thaum ua haujlwm, thiab tsis tuaj yeem ua yam tsis muaj slewing bearing.Lub slewing bearing yog ib feem tseem ceeb ntawm lub slewing mechanism.Lub excavator slewing bearing feem ntau yog siv los txhawb nqa lub cev ntawm lub tsheb sab saud thiab dais cov khoom ua haujlwm.
Lub slewing bearing ntawm lub excavator feem ntau siv cov iav sab hauv ib kab plaub-point slewing bearing thaum hu rau lub pob, thiab siv cov hniav quenching.