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20系列铧式犁为全悬挂式，与标定功率为8.8～29.4KW拖拉机配套作业。适用于壤土、沙壤土地区熟地旱田耕作。

该系列犁具有结构简单、耕作适应范围广、作业质量好、地表平整、碎土覆盖性能好、墒沟小等特点。

Series of 20 is a mounted bottom plow, designed to match with rated power 8.8KW to 29.4KW wheel tractor and is suitable for loam，or sandy loam soil in the cultivated area.

This implement is compact in construction, and wide range in application.

It produces the best wort, leaving alevel surface and a narrow furrow, with a good pulverization and mulching. The maximum plowing depth is25cm.

主要技术参数见表一：

Main specifications see table 1:

一、       犁的构造及其各部分的作用Structure of The Plough and The Roles of Each Part

20系列铧式犁由犁架、限深轮、犁体、前犁体部分、后犁体部分组成。（见图一）

The plough consists of frame, depth limit wheel, front plough body assembly and rear plough body assembly. See (Fig. 1)

图一       犁的构造. Fig  Structure of Plough

1、犁架部分       . frame assembly

2、限深轮部分 depth limit assembly

3、前犁体部分 front plough body assembly

4、后犁体部分 rear plough body assembly

犁架由梁架焊合、斜撑杆焊合、前撑杆组成，用来固定各个工作部件，并通过三挂接点与拖拉机连接。

Frame assembly consists of frame welding, deviate support rod welding and front support rod for fixing all the working parts and connect to the tractors by three points.

犁体是犁的主要工作部件，起切土、碎土、翻土、和覆盖杂草的作用。犁体分前犁体和后犁体，其区别是后犁体的犁侧板比前犁体的稍宽、稍长并在尾部装一个犁后踵。每个犁只有一个后犁体。

Plough body is the main working parts of the plough for cutting. Crushing and turning over the soil and cover the grasses and weeds. There is front plough body and rear plough body and the difference between them is the side board of the rear body is wider and longer than the front one, and there is a plough heel assembled behind the rear body. There is only one rear body for each plough.

限深轮用来调节和控制耕深并在存放时起支撑作用，采用力调节或位调节的拖拉机可以不用限深轮。

Depth limit wheel is used for adjust and control the working depth and also support the plough during storage. If the tractors adopt power adjustment or position adjustment, the depth limit wheel can not be used.

二、       犁的装配Assembling of The Plough

20系列犁的安装位置及尺寸见表二、图二。

The position and the dimension of 20 series plough’s assembly see table 2 and fig. 2

表二 犁的安装尺寸Table2    Assembling dimension of the plough

单位 unit：mm