如何对转向把进行拆装与检修?

2025-03-28 15:11:57
推荐回答(1个)
回答1:

(1)转向把的拆装

如图7-55所示,带有盘式制动器的转向把需要先拆下前制动灯开关插接件,旋下制动液管螺栓,取下制动液管,拆下后视镜,旋下前制动主泵螺栓,取下前制动主泵托架和前制动主泵。

图7-55 盘式制动转向把的拆卸

依次拆下油门转把、前制动握把、离合器握把。

图7-56 从上连板上拆下转向把

如图7-56所示,旋下固定螺栓,取下转向把压盖,即可从上连板上拆下转向把。

踏板式摩托车转向把可按图7-57中所示的字母顺序进行分解。

图7-57 踏板式摩托车转向把的分解图

图7-58 转向把的扭转变形

(2)转向把的变形损坏

转向把受到碰撞后,会产生弯曲或扭转变形。弯曲变形常产生于转向把中部的夹固直管部分,如图7-58所示,同时使手柄部位也变了位;变形也常产生于夹紧箍以外的手柄部分,转向把的扭转变形常产生于被夹紧的直管部分,即对车上来说是水平段及倾斜部分。水平段产生扭转变形后,两手柄部在侧视图上便不重合,扭转变形产生于倾斜部位时,两手柄在俯视图上不对称(就车上安装位置而言)。

(3)转向把的检查

①检查转向把是否变形,若有变形应进行矫正。让驾驶员按正确的姿势操纵转向把,检查转向把与上连板相连的花纹是否还有效,若已经磨损,应重新修复花纹。

② 检查左、右握把是否变形,若有变形应进行矫正。握把应能灵活转动,但也不能太松动,若过于松动,应更换衬套。

图7-59 拉线检查与注油

③ 检查所有的钢索内线能否在钢索外皮中灵活滑动,若有阻滞,则说明钢索内线断线或缺少润滑。如图7-59所示,用专用的钢索润滑器润滑钢索内线,方法是:松开螺栓,由橡胶海绵套吸入机油,旋紧螺栓,将机油压入钢索内线。

检查钢索内线与接头的焊接是否牢固。油门钢索接头的拉脱力应不小于588N,离合器和前制动钢索接头的拉脱力应不小于1764N。若钢索内线无接头时,应保证内线无散开的现象,否则应用锡焊使内线牢固地粘在一起。

(4)转向把的矫正

图7-60 转向把直段处的矫正

①转向把直段处变形的矫正。转向把的夹固部分和手柄部分均为直段,弯曲变形后,可在手动压力的工作台上进行矫正。

如图7-60所示,压力P是通过压杆、铜垫块作用于弯曲处,用两V铁将叉管垫起,对转向把起稳定作用。当两V铁位置与压力点等距离时,两V铁之间的转向把受对称弯矩,产生对称的变形量。两V铁之间的放置距离,要依据转向把弯曲程度以及其壁厚而定。垫铁距离愈大,矫正弯矩愈大。所以较薄的转向把宜将距离拉大,这能使作用力点附近的变形(压扁)程度减小;而较厚的转向把宜将V铁距离放近些,使承受弯矩作用部分短些,避免产生过度矫正。曲率大(微弯)的宜将两V铁距离放远些,使其在压力作用下更利于恢复原管的直线形;曲率小的,往往是局部弯曲严重之处,宜将两V铁放近些。因弯曲越严重,需矫正力也越大,但把V铁相隔近些放置,V铁以外的部分是不受力作用的,矫正作用与这部分无关,这就不会使原来是直的部分反因矫正力过大而变弯。一般两V铁相距200~300mm放置为宜。

② 转向把弯角处变形的矫正。弯曲变形产生于夹固部位附近时,可以把直管段用厚垫支承住,压力P通过夹铁将转向把牢牢地固定,然后利用一矫正杆用手力F进行矫正。如果弯曲产生于柄部时,可按图7-61所示进行夹固,再用一管子套住手柄进行弯曲矫正。

图7-61 转向把弯角处变形的矫正

③ 转向把扭转变形的矫正。AB 段产生扭转变形时,可按图7-62所示进行矫正操作。压力P将转向把夹固,再用手力F通过矫正杆进行矫正。手力F可使AB 段产生扭转变形,BC 段也同时受到弯曲作用,但由于材料的抗弯强度大于抗扭强度,因此,不易使BC 段同时产生弯曲。如果扭转变形产生于夹紧的直管段即BC 段时,矫正操作如图7-63所示。压力P把同在一平面的ABC 段夹紧,再用手力F通过矫正杆使BC 段产生扭转变形,将其矫正。在同一夹紧状态下,如果在手柄上套入管子,用手力可使AB 段或CD 段产生扭转变形而进行矫正。

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