球(qiu)型(xing)支(zhi)(zhi)座(zuo)(zuo)是(shi)由(you)上(shang)支(zhi)(zhi)座(zuo)(zuo)板(ban)(ban)、下(xia)支(zhi)(zhi)座(zuo)(zuo)板(ban)(ban)、球(qiu)形(xing)板(ban)(ban)、聚四氟乙(yi)烯滑板(ban)(ban)（F4、球(qiu)面(mian)四氟板(ban)(ban)）及(ji)橡(xiang)膠(jiao)擋圈(quan)組成(cheng)的(de)(de)一種特殊盆式橡(xiang)膠(jiao)支(zhi)(zhi)座(zuo)(zuo)產品。它將盆式支(zhi)(zhi)座(zuo)(zuo)中(zhong)的(de)(de)橡(xiang)膠(jiao)板(ban)(ban)改(gai)為球(qiu)面(mian)四氟板(ban)(ban)因而(er)得名,由(you)于(yu)QZ球(qiu)型(xing)支(zhi)(zhi)座(zuo)(zuo)中(zhong)間(jian)鋼(gang)板(ban)(ban)及(ji)底盆亦相應地改(gai)成(cheng)球(qiu)面(mian)，減小了(le)摩擦系數。其位(wei)移(yi)由(you)上(shang)支(zhi)(zhi)座(zuo)(zuo)板(ban)(ban)與平面(mian)四氟板(ban)(ban)之(zhi)間(jian)的(de)(de)滑動(dong)(dong)來實現。在上(shang)支(zhi)(zhi)座(zuo)(zuo)板(ban)(ban)上(shang)設置(zhi)導(dao)向槽或(huo)導(dao)向環來約(yue)束(shu)支(zhi)(zhi)座(zuo)(zuo)的(de)(de)單向或(huo)多向位(wei)移(yi)，可以制成(cheng)球(qiu)形(xing)單向活動(dong)(dong)支(zhi)(zhi)座(zuo)(zuo)和固定支(zhi)(zhi)座(zuo)(zuo)。通(tong)過球(qiu)形(xing)板(ban)(ban)和球(qiu)面(mian)四氟板(ban)(ban)之(zhi)間(jian)的(de)(de)滑動(dong)(dong)來滿(man)足支(zhi)(zhi)座(zuo)(zuo)轉角的(de)(de)需要。