顎式破碎機推(tui)(tui)(tui)力板(ban)(ban)(又稱肘板(ban)(ban)),除了傳遞動力使動顎板(ban)(ban)做(zuo)前(qian)后(hou)擺動外,同時(shi)還(huan)具(ju)有保(bao)險作(zuo)用(yong)(yong),改變(bian)(bian)其(qi)長(chang)度還(huan)可(ke)(ke)以(yi)起到調節排礦口(kou)的作(zuo)用(yong)(yong)。顎式破(po)碎(sui)機(ji)(ji)破(po)碎(sui)腔(qiang)內進(jin)入不可(ke)(ke)破(po)碎(sui)物(wu)(如鐵球、鐵塊等)時(shi),為(wei)保(bao)護設(she)備主(zhu)要(yao)(yao)部件不受損壞(huai)而采用(yong)(yong)后(hou)推(tui)(tui)(tui)力板(ban)(ban)作(zuo)為(wei)破(po)碎(sui)機(ji)(ji)保(bao)險部件。后(hou)推(tui)(tui)(tui)力板(ban)(ban)一般(ban)用(yong)(yong)鑄鐵鑄成整體,在其(qi)中部開一條槽(cao)或若(ruo)干小孔以(yi)降低(di)它的斷面強度;也可(ke)(ke)鑄成兩塊,然后(hou)用(yong)(yong)螺釘(ding)(或鉚釘(ding))連接(jie)起來,組(zu)成組(zu)合推(tui)(tui)(tui)力板(ban)(ban)。當不可(ke)(ke)破(po)碎(sui)物(wu)進(jin)入破(po)碎(sui)腔(qiang)時(shi),設(she)備超負(fu)荷,巨(ju)大破(po)碎(sui)力傳給推(tui)(tui)(tui)力板(ban)(ban)導致推(tui)(tui)(tui)力板(ban)(ban)折(zhe)斷或組(zu)合推(tui)(tui)(tui)力板(ban)(ban)的螺釘(ding)剪斷,機(ji)(ji)器停止工(gong)作(zuo),起到保(bao)險作(zuo)用(yong)(yong)。隨著齒(chi)板(ban)(ban)的不斷磨損,排礦口(kou)逐漸變(bian)(bian)大,產(chan)品(pin)(pin)不斷變(bian)(bian)粗(cu),為(wei)了獲得合格(ge)的產(chan)品(pin)(pin)粒度,需要(yao)(yao)定(ding)期(qi)調整排礦口(kou)尺寸。排礦口(kou)的調整方(fang)法主(zhu)要(yao)(yao)有以(yi)下兩種:
(1)螺母上下調整,即放前拉力板的支承座最后與機架后壁中放五組螺母,增減螺母數目或修改其它的厚度,便達到到上下調整排礦口之必要性。此法機構緊湊型轎車、上下調整信得過,大、中大型顎式漏沙機配用那樣上下調整方式。 (2)楔塊調高,是用加在拉力板后座與機架內的兩個人楔塊調高,適當長安小型粉碎流程機所采用。