花生收获机外文翻译

Design principle and analyses of the motion

characteristics of4H-2type peanut harvester

Shang Shuqi,Wang Jiangang,Wang Fangyan,Liu Shuguang,Jiang Yuanzhi

(EngineeringSchool,LaiyangAgricultural University,Laiyang,Shandong265200,China)

Abstract:

The structure, working principle and design of main parts of the 4H-2

type peanut harvester were described andanalyzed, and the kinematics model of the

main

work

parts

was

founded.

On

the

basis

of

the

optimized

structure,

therepresentative tracks of the work parts were

described by means of

Visual Basic

and

SPSS

software

and

the

machinefunction

characteristics.

The

theoretical

foundation has been provided for further study of this kind of machines.

Key words:

Peanut harvester; design principle; motion characteristics

CLC number:

S225.73

Document Code:

A

Article ID:

1002-6819(2005)01-0087-05

1 Introduction

The peanut is one of the main oil plants in the world, which is only inferior to soybean

but

ranks

the

second

for

oil

production

and

international

a

long

time,

the

planting, harvesting and processing of peanut were mostly completed by manual work.

It is a piece of labored work with low efficiency, which affects the peanut production

seriously. Especially in the last few

years, as the transferring surplus rural labors to

urban areas, the contradiction of each link of peanut production is more intensifying,

the mechanization of the peanut production becomes particularly important.

It

has

been

a

long

time

for

researching

and

developing

the

peanut

harvesters

in

developed countries, it is a typical representative that the LP-2 type peanut harvester

and peanut combine harvester of

and

PH-2

type

peanut

harvester

of

Michigan

in

Netherlands.

The

development

of

peanut

harvester

in

China

is

later

than

that

in

developed

countries,

perhaps

the

beginning

of

the

1960s.

Since

the

1970s,

many

representative

mimic

peanut

harvesters were introduced into China such as the Dongfeng 69 type, 4HW-800 type

and

4H-150

type

peanut

harvester

products

bring

convenience

for

harvesting peanut, but the structure of all current harvesters adopted the two steps of

harvest

principle

—

scoop

and

separating

chain

combine

together.

These

machines

have to match with the medium-big power tractors. It is not only complex in structure,

higher manufacturing costs, more power consumption, poor reliability, but also higher

harvesting

loss

rate,

peanut

vines

spread

disorderly,

and

inconvenient

for

manual

collection.

It

is

not

suitable

for

the

current

requirement

of

peanut

harvesting

and

results in that the harvesting of peanut is almost completed by manual work at present.

The mechanization level of peanut harvesting affected the development of the peanut

production seriously.

2 Structure design of the peanut harvester

Analysis of the whole machine structure

4H-2

type

peanut

harvester

combines

with

the

advanced

method

of

planting

and

agricultural

requirement,

which

can

harvest

two

rows

at

one

working

stroke.

It

matches with the 8.8~13.0 kW small four-wheel tractors. 4H-2 type peanut harvester

is

composed

of

gaging

wheel,

transmission

shaft,

eccentric

wheel,

pitman,

long

rocker-arm,

erect

axis,

harvesting

parts,

long

pitman,

rocker-arm,

mounting

device

and frame etc. The figure 2 shows its structure.

wheel

coupling

ission

shaft

xis

rocker-arm

pitman

ng

device

-arm

axis

ter

part

ricwheel

t part

Fig.2

Diagram of peanut harvester

The driving power needed of the work parts of 4H-2 type peanut harvester comes

from the PTO of tractor. When the machine with tractor goes forward, the PTO drives

eccentric

wheel

11

pass

through

joint

coupling

2

and

transmission

shaft

3.

Then

eccentric wheel 11 drives long rocker-arm 5 to move pass through pitman 12. As erect

axis 4 and harvest parts 13 are made together, rocker 8 with long pitman 6 and long

rocker-arm 5 constitute an inverse parallelogram mechanism, therefore harvest parts

10

and

13

swing

with

erect

axis

4

and

9

with

the

same

frequency

and

angle

but

contrary direction. The working process is: the scoops 10 and 13 digging the peanut

out and moving the peanut backward, while the lengthways grids continuously make

the

fanlike

swing,

and

then

break

the

admixture

of

soil

and

peanuts.

By

this

movement the heavy soil sinks down via the grids, and the lighter peanut moves up,

so

that

peanut

is

separated

from

soil

well.

The

peanut

is

moving

rearward

continuously,

finally

even

laying

on

the

excavated

ground,

so

it

is

convenient

for

manual collection.

3

：

Function characteristics of the harvester

The swing-digging principle and the inverse

parallelogram

mechanism have been

successfully

created

and

applied

to

4H-2

type

peanut

harvester.

It

had

broken

the

traditional way which is scoop and separate chain to combine together for harvesting.

(1) 4H-2 type peanut harvester should be matched with the small four-wheel tractors

which

are

very

universal.

Its

design

is

reasonable,

with

reliable

working,

steady

function,

convenient

adjustment,

higher

adaptability,

and

this

machine

can

work

in

various fields and harvest all kinds of peanut.

(2)

In

harvesting

process,

plastic

film

was

not

broken

and

easy

collected

with

the

peanut stalks. There is none leavings of them on the ground.

(3)

As

created

the

swing-digging

principle,

the

whole

resistance

and

the

power

consumption of the harvester have been reduced. By means of the swing function, the

soil with heavy specific gravity sinking passes through the grids, and the peanut with

lighter

specific

gravity

moves

up,

so

that

the

loss

rate

of

peanut

was

reduced

remarkably.

4H-2 type peanut harvester is the new typical agricultural implement for the small

scale farms of China and more suitable for Chinese peanut production. This harvester

has the simpler structure and lower price. Its various performance indexes are superior

to the Standard of technique indexes for peanut harvesting in China. It can bring more

economic benefit to the customers.

References

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Duan

Shufen,

Hou

Wenguang.

The

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