摘要
以省力、实用为设计目标,研制出一种双杠杆双曲省力桑枝大剪,与现有的普通桑枝大剪相比,其结构与功能的特点是:增长砧刀和剪切刀动力臂以及用齿轮构成第2级杠杆的双杠杆,达到省力效果;使双刀横向弯曲,可同时适用于高干、低干桑树的枝条剪伐;采用防外滑的刀头,以便于手握剪伐;将直式砧刀手柄改为向内弯曲减小张角且两手柄间距缩短,可将砧刀手柄挎腰而便于操作者剪伐时同时收集剪下的枝条。采用以上设计的桑枝大剪具有省力、操作方便等特点,适合小规模生产和老年体弱桑园劳作者使用,剪切速度比使用普通桑枝剪快1.5～2倍,并且桑枝的剪切面光滑平整。
By taking effort-saving and easy-handling as the design objectives,we have developed an effort-saving mulberry branch shear with double levers and double bends.Compared with the current common mulberry branch shears,it has the following structural and functional features.Firstly,length of the power arms of anvil knife and cutting knife is increased and gear wheel is used for the second lever of double levers to achieve effort-saving effect.Secondly,the two knives are bent horizontally,being suitable for pruning branches of both high-and low-trunk mulberry trees.Thirdly,end of the knife is designed to prevent slipping off so that the shear is easily held to do the pruning job.Finally,in order to reduce the flare angle,the straight anvil knife handles have been changed into bending inside,and the distance between the two handles has been shortened so that the operator can prune and collect the branches with over-waist handle.Such designed mulberry branch shear is effort-saving and easy-operated.It is fit for use in small scale production or by old and weak workers in mulberry garden.Its working efficiency is 1.5 to 2 times to that of the common mulberry branch shear,and the cuts on mulberry branches are smooth and flat.
出处
《蚕业科学》
CAS
CSCD
北大核心
2013年第2期390-393,共4页
ACTA SERICOLOGICA SINICA
基金
现代农业产业技术体系专项(No.CARS-22)
四川省育种攻关项目(No.2011yzgg-014)
四川省科技支撑项目(No.2012NZ0004)
科技部星火计划项目(No.2011810011)
关键词
桑枝剪
双杠杆
齿轮
砧刀力臂
弯曲手柄
省力
Mulberry branch shear
Double levers
Gear wheel
Anvil arm
Bend handle
Effort-saving
