一種大皮重小(xiao)量程單點(dian)式稱(cheng)重測力(li)傳(chuan)感器(qi)

技術領域

[0001] 本發明專利涉及單(dan)點式(shi)稱重(zhong)測力(li)傳(chuan)感器(qi)。

背景技術

[0002] 傳統的(de)(de)(de)單點式測力傳感器只有上梁和下梁，且受力后應(ying)變區直接發生形變，隨(sui)即(ji)輸出信號。目(mu)前，有的(de)(de)(de)應(ying)用場合為(wei)皮重(zhong)(zhong)遠(yuan)較稱(cheng)量(liang)(liang)(liang)量(liang)(liang)(liang)程大，比如(ru)，皮重(zhong)(zhong)為(wei)100㎏而(er)量(liang)(liang)(liang)程僅5㎏，上述結構的(de)(de)(de)測力傳感器遇到(dao)這種情況，不能滿足稱(cheng)量(liang)(liang)(liang)精度(du)，不適合大皮重(zhong)(zhong)小量(liang)(liang)(liang)程的(de)(de)(de)稱(cheng)重(zhong)(zhong)要求。

發明內容

[0003] 本(ben)發明所(suo)(suo)要解決(jue)的(de)技術問題是(shi)提供一種大皮重小(xiao)(xiao)量(liang)程單點式(shi)稱(cheng)(cheng)重測力(li)傳(chuan)感器，以(yi)克服傳(chuan)統單點式(shi)測力(li)傳(chuan)感器皮重小(xiao)(xiao)、量(liang)程大、精度低的(de)問題。為(wei)此，本(ben)發明采(cai)用(yong)(yong)以(yi)下(xia)(xia)技術方(fang)案(an)：它包括由上(shang)下(xia)(xia)左右四(si)個剛性桿(gan)(gan)(gan)構成的(de)整(zheng)體彈性體，在(zai)四(si)個剛性桿(gan)(gan)(gan)的(de)交界處為(wei)橫(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)部位，所(suo)(suo)述(shu)(shu)(shu)橫(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)分為(wei)一對(dui)上(shang)橫(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)和一對(dui)下(xia)(xia)橫(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)，所(suo)(suo)述(shu)(shu)(shu)上(shang)橫(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)和下(xia)(xia)橫(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)呈矩(ju)(ju)形(xing)四(si)角分布，所(suo)(suo)述(shu)(shu)(shu)上(shang)橫(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)和下(xia)(xia)橫(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)的(de)橫(heng)(heng)截(jie)面(mian)積小(xiao)(xiao)于(yu)剛性桿(gan)(gan)(gan)的(de)橫(heng)(heng)截(jie)面(mian)積；所(suo)(suo)述(shu)(shu)(shu)彈性體中間還設有豎(shu)梁(liang)(liang)(liang)(liang)(liang)，所(suo)(suo)述(shu)(shu)(shu)豎(shu)梁(liang)(liang)(liang)(liang)(liang)處于(yu)所(suo)(suo)述(shu)(shu)(shu)矩(ju)(ju)形(xing)的(de)中心，與上(shang)部剛性桿(gan)(gan)(gan)和下(xia)(xia)部剛性桿(gan)(gan)(gan)一體，所(suo)(suo)述(shu)(shu)(shu)一對(dui)上(shang)橫(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)和一對(dui)下(xia)(xia)橫(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)相對(dui)于(yu)所(suo)(suo)述(shu)(shu)(shu)豎(shu)梁(liang)(liang)(liang)(liang)(liang)對(dui)稱(cheng)(cheng)，所(suo)(suo)述(shu)(shu)(shu)豎(shu)梁(liang)(liang)(liang)(liang)(liang)的(de)橫(heng)(heng)截(jie)面(mian)積小(xiao)(xiao)于(yu)上(shang)橫(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)和下(xia)(xia)橫(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)的(de)橫(heng)(heng)截(jie)面(mian)積，豎(shu)梁(liang)(liang)(liang)(liang)(liang)用(yong)(yong)于(yu)設置(zhi)稱(cheng)(cheng)重敏感元(yuan)件。

[0004] 在采用上述技(ji)術(shu)方案的(de)基(ji)礎上，本發明還可采用以下進一步的(de)技(ji)術(shu)方案：所(suo)述豎梁(liang)處在由四個剛(gang)性(xing)桿圍成的(de)中部通孔中。

[0005] 所(suo)述(shu)上橫(heng)梁和下(xia)橫(heng)梁為(wei)在靠近(jin)它們(men)所(suo)處端(duan)的彈性體(ti)上鉆(zhan)孔(kong)而形成的孔(kong)壁；所(suo)述(shu)孔(kong)與(yu)所(suo)述(shu)中間通(tong)孔(kong)之間由(you)縫連通(tong)，并由(you)所(suo)述(shu)縫和孔(kong)界定(ding)將所(suo)述(shu)彈性體(ti)分(fen)為(wei)上下(xia)左右四個剛性桿。

[0006] 所述縫相對(dui)于豎梁對(dui)稱設置。

[0007] 所述彈性體在中部通孔(kong)的外圍具有盲孔(kong)圈(quan)。

[0008] 所述(shu)彈性(xing)體在對應形成上橫梁和下橫梁的(de)四個孔的(de)位(wei)置的(de)表面具有定位(wei)凹(ao)槽。

[0009] 由于(yu)(yu)采用(yong)本發(fa)明(ming)(ming)的(de)(de)技(ji)術方案，所(suo)述上橫(heng)梁(liang)和(he)(he)下橫(heng)梁(liang)先于(yu)(yu)豎(shu)梁(liang)變形(xing)，用(yong)于(yu)(yu)承(cheng)擔皮(pi)重(zhong)(zhong)，在皮(pi)重(zhong)(zhong)情況(kuang)下豎(shu)梁(liang)不(bu)變形(xing)或變形(xing)極小(xiao)(xiao)，豎(shu)梁(liang)用(yong)于(yu)(yu)承(cheng)擔稱(cheng)(cheng)(cheng)(cheng)(cheng)重(zhong)(zhong)測(ce)力(li)的(de)(de)作用(yong)，本發(fa)明(ming)(ming)的(de)(de)結構非常(chang)適合(he)大(da)皮(pi)重(zhong)(zhong)小(xiao)(xiao)量(liang)(liang)程(cheng)(cheng)的(de)(de)稱(cheng)(cheng)(cheng)(cheng)(cheng)重(zhong)(zhong)要(yao)(yao)求。進一步地，本發(fa)明(ming)(ming)彈(dan)性(xing)體具有鉸支結構特(te)點，四(si)根橫(heng)梁(liang)不(bu)僅用(yong)于(yu)(yu)稱(cheng)(cheng)(cheng)(cheng)(cheng)重(zhong)(zhong)承(cheng)載而且起到剛(gang)性(xing)桿的(de)(de)軸的(de)(de)作用(yong)，在稱(cheng)(cheng)(cheng)(cheng)(cheng)重(zhong)(zhong)時，彈(dan)性(xing)體由矩形(xing)支撐向(xiang)平行四(si)邊形(xing)支撐轉變，豎(shu)梁(liang)變形(xing)時呈(cheng)S形(xing)，能夠(gou)提高傳(chuan)(chuan)感(gan)器的(de)(de)稱(cheng)(cheng)(cheng)(cheng)(cheng)重(zhong)(zhong)靈敏度，提高小(xiao)(xiao)量(liang)(liang)程(cheng)(cheng)的(de)(de)稱(cheng)(cheng)(cheng)(cheng)(cheng)重(zhong)(zhong)精度。并且，本發(fa)明(ming)(ming)可通(tong)(tong)過改變上橫(heng)梁(liang)和(he)(he)下橫(heng)梁(liang)的(de)(de)橫(heng)截面積，以(yi)針對不(bu)同的(de)(de)皮(pi)重(zhong)(zhong)要(yao)(yao)求，通(tong)(tong)過改變豎(shu)梁(liang)的(de)(de)橫(heng)截面積則可控制(zhi)量(liang)(liang)程(cheng)(cheng)，非常(chang)方便各種大(da)皮(pi)重(zhong)(zhong)小(xiao)(xiao)量(liang)(liang)程(cheng)(cheng)的(de)(de)稱(cheng)(cheng)(cheng)(cheng)(cheng)重(zhong)(zhong)設計，提高稱(cheng)(cheng)(cheng)(cheng)(cheng)重(zhong)(zhong)測(ce)力(li)傳(chuan)(chuan)感(gan)器的(de)(de)稱(cheng)(cheng)(cheng)(cheng)(cheng)重(zhong)(zhong)精度。

附圖說明

[0010] 圖(tu)(tu)1為本發明所提(ti)供的實施例1的主視圖(tu)(tu)。

[0011] 圖(tu)2為圖(tu)1的(de)俯視圖(tu)。

[0012] 圖3為本(ben)發明所提(ti)供的實(shi)施例2的主視(shi)圖。

具體實施(shi)方式

[0013] 實施(shi)例1，參照附(fu),1、2。

[0014] 本發(fa)明包(bao)括由(you)上(shang)(shang)(shang)下(xia)(xia)(xia)左右四個剛(gang)性桿(gan)(gan)100a、100b、100c、100d構成的(de)(de)(de)整體彈性體，在四個剛(gang)性桿(gan)(gan)的(de)(de)(de)交(jiao)界處(chu)(chu)為(wei)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)部位，所述(shu)(shu)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)分為(wei)一(yi)對(dui)(dui)(dui)上(shang)(shang)(shang)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)11、12和一(yi)對(dui)(dui)(dui)下(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)13、14，所述(shu)(shu)上(shang)(shang)(shang)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)11、12和下(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)13、14呈矩形四角分布(bu)，所述(shu)(shu)上(shang)(shang)(shang)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)和下(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)的(de)(de)(de)橫(heng)(heng)(heng)(heng)(heng)(heng)截(jie)面積(ji)小于(yu)剛(gang)性桿(gan)(gan)的(de)(de)(de)橫(heng)(heng)(heng)(heng)(heng)(heng)截(jie)面積(ji)；所述(shu)(shu)彈性體中(zhong)間(jian)還設有(you)豎梁(liang)(liang)2，所述(shu)(shu)豎梁(liang)(liang)2處(chu)(chu)于(yu)所述(shu)(shu)矩形的(de)(de)(de)中(zhong)心(xin)，與(yu)上(shang)(shang)(shang)部剛(gang)性桿(gan)(gan)100a和下(xia)(xia)(xia)部剛(gang)性桿(gan)(gan)100b一(yi)體，所述(shu)(shu)一(yi)對(dui)(dui)(dui)上(shang)(shang)(shang)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)11、12和一(yi)對(dui)(dui)(dui)下(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)13、14相對(dui)(dui)(dui)于(yu)所述(shu)(shu)豎梁(liang)(liang)對(dui)(dui)(dui)稱(cheng)(cheng)，所述(shu)(shu)對(dui)(dui)(dui)稱(cheng)(cheng)為(wei)上(shang)(shang)(shang)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)之間(jian)對(dui)(dui)(dui)稱(cheng)(cheng)、下(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)之間(jian)對(dui)(dui)(dui)稱(cheng)(cheng)、上(shang)(shang)(shang)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)和下(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)之間(jian)對(dui)(dui)(dui)稱(cheng)(cheng)，所述(shu)(shu)豎梁(liang)(liang)的(de)(de)(de)橫(heng)(heng)(heng)(heng)(heng)(heng)截(jie)面積(ji)小于(yu)上(shang)(shang)(shang)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)和下(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)(heng)(heng)梁(liang)(liang)的(de)(de)(de)橫(heng)(heng)(heng)(heng)(heng)(heng)截(jie)面積(ji)，豎梁(liang)(liang)用于(yu)設置稱(cheng)(cheng)重(zhong)敏(min)感元件(jian)。

[0015] 所述(shu)(shu)豎梁2處在由四個剛性(xing)桿圍成的(de)(de)中(zhong)(zhong)部通孔20中(zhong)(zhong)。所述(shu)(shu)豎梁的(de)(de)橫截面的(de)(de)D向(xiang)(xiang)尺(chi)(chi)寸大(da)于(yu)C向(xiang)(xiang)尺(chi)(chi)寸，所述(shu)(shu)D向(xiang)(xiang)為彈性(xing)體厚(hou)度方向(xiang)(xiang)，所述(shu)(shu)C向(xiang)(xiang)和D向(xiang)(xiang)垂直。如果需要增(zeng)大(da)量程時，也(ye)可以增(zeng)大(da)C向(xiang)(xiang)尺(chi)(chi)寸直至大(da)于(yu)D向(xiang)(xiang)尺(chi)(chi)寸。

[0016] 上述彈性體可為對(dui)一(yi)整塊剛性金屬件進(jin)行鉆(zhan)孔和切割加工而成。

[0017] 所述上(shang)橫(heng)梁(liang)和下橫(heng)梁(liang)為(wei)在(zai)靠(kao)近它(ta)們所處端的彈(dan)性(xing)體上(shang)鉆孔(kong)(kong)5而(er)形(xing)成的孔(kong)(kong)壁；所述孔(kong)(kong)5與所述中間通孔(kong)(kong)20之間由縫4連(lian)通，并由所述縫4和孔(kong)(kong)5界定(ding)將所述彈(dan)性(xing)體分(fen)為(wei)上(shang)下左右四個(ge)剛性(xing)桿。

[0018] 所述(shu)(shu)縫4相(xiang)對(dui)(dui)(dui)于豎梁2對(dui)(dui)(dui)稱(cheng)(cheng)設置。所述(shu)(shu)對(dui)(dui)(dui)稱(cheng)(cheng)為相(xiang)鄰縫4之間對(dui)(dui)(dui)稱(cheng)(cheng)、對(dui)(dui)(dui)向縫4之間對(dui)(dui)(dui)稱(cheng)(cheng)。

[0019] 所述彈性體(ti)在中(zhong)部通孔20的外圍具有盲(mang)孔圈6。

[0020] 所述彈性(xing)體(ti)在對應形成(cheng)上橫梁和下橫梁的四個孔5的位置的表(biao)面具有定位凹(ao)槽(cao)7。

[0021] 在設(she)計(ji)時，通過設(she)計(ji)不(bu)同(tong)的(de)孔5壁厚(hou)A及彈性體(ti)厚(hou)度B可(ke)以改變(bian)皮重的(de)大小，通過設(she)計(ji)不(bu)同(tong)的(de)豎(shu)梁(liang)壁厚(hou)C和豎(shu)梁(liang)寬度D，可(ke)以控制(zhi)量程(cheng)，從而達到大皮重小量程(cheng)的(de)高精度傳感器。

[0022] 以(yi)所(suo)述(shu)(shu)傳(chuan)感器的上橫(heng)梁(liang)和下橫(heng)梁(liang)可以(yi)承受50kg的皮重為例。在(zai)所(suo)述(shu)(shu)上橫(heng)梁(liang)和下橫(heng)梁(liang)承受50kg皮重后(hou)，豎(shu)梁(liang)才有足(zu)夠的形變(bian)，開始正常輸出信號。在(zai)上橫(heng)梁(liang)下橫(heng)梁(liang)承受50kg以(yi)內的力，豎(shu)梁(liang)變(bian)形極小，沒有信號輸出。

[0023] 實(shi)施(shi)例2，參照(zhao)附圖(tu)3。

[0024] 在本實施例中(zhong)，本發明同樣包括由上(shang)(shang)下(xia)(xia)(xia)(xia)左右四(si)個剛(gang)性(xing)(xing)桿(gan)100a、100b、100c、100d構(gou)成的(de)整(zheng)體彈性(xing)(xing)體，在四(si)個剛(gang)性(xing)(xing)桿(gan)的(de)交界處為(wei)(wei)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)部位，所(suo)(suo)(suo)述(shu)(shu)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)分(fen)為(wei)(wei)一(yi)(yi)對(dui)上(shang)(shang)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)11、12和(he)(he)一(yi)(yi)對(dui)下(xia)(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)13、14，所(suo)(suo)(suo)述(shu)(shu)上(shang)(shang)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)11、12和(he)(he)下(xia)(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)13、14呈矩形四(si)角分(fen)布，所(suo)(suo)(suo)述(shu)(shu)上(shang)(shang)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)和(he)(he)下(xia)(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)的(de)橫(heng)(heng)(heng)(heng)截(jie)面積(ji)小(xiao)于(yu)剛(gang)性(xing)(xing)桿(gan)的(de)橫(heng)(heng)(heng)(heng)截(jie)面積(ji)；所(suo)(suo)(suo)述(shu)(shu)彈性(xing)(xing)體中(zhong)間(jian)還設有豎(shu)梁(liang)(liang)(liang)(liang)(liang)2，所(suo)(suo)(suo)述(shu)(shu)豎(shu)梁(liang)(liang)(liang)(liang)(liang)2處于(yu)所(suo)(suo)(suo)述(shu)(shu)矩形的(de)中(zhong)心(xin)，與上(shang)(shang)部剛(gang)性(xing)(xing)桿(gan)100a和(he)(he)下(xia)(xia)(xia)(xia)部剛(gang)性(xing)(xing)桿(gan)100b一(yi)(yi)體，所(suo)(suo)(suo)述(shu)(shu)一(yi)(yi)對(dui)上(shang)(shang)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)11、12和(he)(he)一(yi)(yi)對(dui)下(xia)(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)13、14相對(dui)于(yu)所(suo)(suo)(suo)述(shu)(shu)豎(shu)梁(liang)(liang)(liang)(liang)(liang)對(dui)稱(cheng)(cheng)，所(suo)(suo)(suo)述(shu)(shu)對(dui)稱(cheng)(cheng)為(wei)(wei)上(shang)(shang)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)之(zhi)(zhi)間(jian)對(dui)稱(cheng)(cheng)、下(xia)(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)之(zhi)(zhi)間(jian)對(dui)稱(cheng)(cheng)、上(shang)(shang)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)和(he)(he)下(xia)(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)之(zhi)(zhi)間(jian)對(dui)稱(cheng)(cheng)，所(suo)(suo)(suo)述(shu)(shu)豎(shu)梁(liang)(liang)(liang)(liang)(liang)的(de)橫(heng)(heng)(heng)(heng)截(jie)面積(ji)小(xiao)于(yu)上(shang)(shang)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)和(he)(he)下(xia)(xia)(xia)(xia)橫(heng)(heng)(heng)(heng)梁(liang)(liang)(liang)(liang)(liang)的(de)橫(heng)(heng)(heng)(heng)截(jie)面積(ji)，豎(shu)梁(liang)(liang)(liang)(liang)(liang)用于(yu)設置稱(cheng)(cheng)重敏感(gan)元(yuan)件8。

[0025] 所述豎(shu)梁2處在由四個剛性桿圍成的中(zhong)部通孔20中(zhong)。

[0026] 在實施(shi)例的(de)(de)基礎上(shang)可(ke)以預見(jian)，對(dui)于上(shang)下橫(heng)(heng)(heng)(heng)梁(liang)的(de)(de)形(xing)(xing)(xing)成(cheng)(cheng)方(fang)(fang)(fang)式(shi)還可(ke)以有其它多種方(fang)(fang)(fang)式(shi)，比(bi)如將(jiang)上(shang)下橫(heng)(heng)(heng)(heng)梁(liang)部位的(de)(de)彈(dan)性體(ti)(ti)(ti)銑薄，或(huo)將(jiang)上(shang)下橫(heng)(heng)(heng)(heng)梁(liang)部位的(de)(de)彈(dan)性體(ti)(ti)(ti)形(xing)(xing)(xing)狀(zhuang)銑成(cheng)(cheng)工字形(xing)(xing)(xing)截(jie)面等(deng)等(deng)，其最終目(mu)的(de)(de)為(wei)使上(shang)、下橫(heng)(heng)(heng)(heng)梁(liang)的(de)(de)橫(heng)(heng)(heng)(heng)截(jie)面積(ji)小于剛性桿(gan)的(de)(de)橫(heng)(heng)(heng)(heng)截(jie)面積(ji)。對(dui)于上(shang)下橫(heng)(heng)(heng)(heng)梁(liang)的(de)(de)形(xing)(xing)(xing)成(cheng)(cheng)方(fang)(fang)(fang)式(shi)實際(ji)上(shang)也可(ke)轉換成(cheng)(cheng)上(shang)下左右四個剛性桿(gan)的(de)(de)外形(xing)(xing)(xing)設(she)置(zhi)問題，在本實施(shi)例中，“桿(gan)”不(bu)一定(ding)是細長形(xing)(xing)(xing)態（就像”四連(lian)桿(gan)“中的(de)(de)桿(gan)，也不(bu)一定(ding)必須是細長形(xing)(xing)(xing)狀(zhuang)，只要其起到“連(lian)桿(gan)”的(de)(de)作用即可(ke)）。在本發明中，“桿(gan)”比(bi)“梁(liang)”橫(heng)(heng)(heng)(heng)截(jie)面積(ji)大，而相對(dui)于橫(heng)(heng)(heng)(heng)梁(liang)成(cheng)(cheng)為(wei)剛形(xing)(xing)(xing)體(ti)(ti)(ti)，起到“后變(bian)形(xing)(xing)(xing)”的(de)(de)作用，使得與桿(gan)連(lian)接的(de)(de)豎梁(liang)針對(dui)稱重(zhong)物體(ti)(ti)(ti)變(bian)形(xing)(xing)(xing)，不(bu)受大皮(pi)重(zhong)影響。