Frame structure and excavator

The utility model provides a frame structure and an excavator. The frame structure comprises a frame body and a side door mounting frame, the side door installation frame comprises an n-shaped bottom plate fixed to the frame body, a supporting frame vertically installed on the bottom plate and a top frame installed on the top face of the supporting frame. Wherein the supporting frame comprises a door frame used for installing the side door and a plurality of supporting columns, the supporting columns are arranged on the bottom plate at intervals, and due to the fact that the supporting columns are fixed to the same bottom plate and are fixed in position, the dimensional tolerance generated in the assembling process can be controlled within a certain range; therefore, the side door mounting rack is more convenient and accurate to assemble. 本实用新型提供了一种车架结构和挖掘机，车架结构包括：车架本体和侧门安装架；其中，所述侧门安装架包括固定于所述车架本体上呈"Π"型的底板，竖直安装于所述底板上的支撑架和安装于所述支撑架顶面的顶架；其中，所述支撑架包括用于安装侧门的门框架和多个支撑柱，其中多个所述支撑柱间隔设置于所述底板上，由于多个支撑柱固定在同一个底板上，位置固定，在进行组装时产