中鐵隧道(dao)集團輪(lun)胎式起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)(zhong)機(ji)是把(ba)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)(zhong)安裝(zhuang)在加重(zhong)(zhong)(zhong)(zhong)(zhong)型輪(lun)胎和輪(lun)軸組成(cheng)的(de)特制底盤上(shang)的(de)一種全(quan)回轉(zhuan)(zhuan)(zhuan)式起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)(zhong)機(ji)，其上(shang)部構造與履(lv)帶式起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)(zhong)機(ji)基(ji)本相同(tong)，為(wei)了保證安裝(zhuang)作(zuo)業時(shi)機(ji)身的(de)穩定(ding)性，起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)(zhong)機(ji)設(she)有四個可伸縮的(de)支(zhi)(zhi)腿(tui)。在平(ping)(ping)坦地面上(shang)可不用支(zhi)(zhi)腿(tui)進(jin)行小起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)(zhong)量吊裝(zhuang)及吊物低速行駛。它由(you)上(shang)車(che)和下車(che)兩部分組成(cheng)。上(shang)車(che)為(wei)起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)(zhong)作(zuo)業部分，設(she)有動臂、起(qi)(qi)(qi)升、變(bian)幅、平(ping)(ping)衡重(zhong)(zhong)(zhong)(zhong)(zhong)和轉(zhuan)(zhuan)(zhuan)臺等；下車(che)為(wei)支(zhi)(zhi)承(cheng)和行走部分。上(shang)、下車(che)之(zhi)間用回轉(zhuan)(zhuan)(zhuan)支(zhi)(zhi)承(cheng)連接。吊重(zhong)(zhong)(zhong)(zhong)(zhong)時(shi)一般(ban)需放(fang)下支(zhi)(zhi)腿(tui)，增大(da)支(zhi)(zhi)承(cheng)面，并將機(ji)身調(diao)平(ping)(ping)，以保證起(qi)(qi)(qi)重(zhong)(zhong)(zhong)(zhong)(zhong)機(ji)的(de)穩定(ding)。
