CN101347068B

CN101347068B - Seedling planting machine

Info

Publication number: CN101347068B
Application number: CN200810133337.4A
Authority: CN
Inventors: 福井享; 大内建之; 山口信
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 2007-07-19
Filing date: 2008-07-18
Publication date: 2014-07-09
Anticipated expiration: 2028-07-18
Also published as: JP4957427B2; KR100988059B1; CN101347068A; JP2009022201A; KR20090009151A

Abstract

The invention relates to a seedling planting machine aiming to prevent the seeding planting tool from pulsation even in wide planting situation. When a wide planting space is set by the plant spacing lever, a plant spacing speed change gear (A) drives the seeding planting device (52) to move through a first eccentric gear (100) and a second eccentric gear (112). The machine also has a speed limiting arm for limiting the high speed side switching of the speed change lever which is used to adjust the speed of the machine though a speed changing gear. The plant spacing lever can select the operating speed of the seeding planting device acquired from the plant spacing speed change gear (A) in a suitable speed interval among multiple intervals and change the seed planting space.

Description

Seedling transplanter

Technical field

The present invention relates to the seedling transplanter of the plant distance that can change seedling.

Background technology

In the seedling transplanter (sometimes also referred to as rice transplanter) possessing with the seedling-planting device of rice transplanter hull, during seedling transplanter advances, the instrument that plants seedlings of seedling-planting device also rotates with constant speed relative to travel speed taking central shaft as pivot, and seedling is planted in farmland with predetermined distance.

Possesses the seedling-planting device of eccentric gear in use by the occasion that makes via this eccentric gear to plant seedlings action of tool and plant seedlings with wider interval, although the movement locus that has a tool work that makes to plant seedlings suitably and the seedling transplanter suitably planting seedlings, but in the time that the operating rate of seedling-planting device becomes high speed, there is pulsation phenomenon (to the such unstable action of vibration occurs) in the transmission of seedling-planting device sometimes.

In order to prevent this phenomenon, be provided for preventing that the one-way clutch of reversion from preventing the seedling transplanter of the unit of the transmission generation pulsation phenomenon of above-mentioned seedling-planting device thereby researched and developed to possess by entering in front and back between speed change gear and eccentric gear.

Patent documentation 1: TOHKEMY 2005-143340 communique

In possessing as patent documentation 1 in the seedling transplanter of disclosed seedling-planting device, due to eccentric gear being installed, so in the occasion of planting seedlings with wider interval, in the operation etc. that utilizes gear lever by travel speed speed change during to a side at a high speed, the operating rate of seedling-planting device becomes at a high speed, and the instrument that plants seedlings is easily pulsed.Summary of the invention

So, the object of the present invention is to provide and prevent the pulsation of the instrument that plants seedlings being caused by eccentric gear the seedling transplanter that can suitably plant seedlings.

The problems referred to above of the present invention solve by following technical scheme.

The invention that scheme one is recorded is a kind of seedling transplanter, has: running vehicle body 2; Be mounted in the engine 20 on this running vehicle body 2; Power from this engine 20 is carried out speed change and changes the speed change gear 23 of the travel speed of running vehicle body 2; And this speed change gear 23 is moved and change the gear lever 124 of travel speed, the rear portion that is connected to running vehicle body 2 to the portion of planting seedlings 4 of the seedling-planting device 52 of farmland planting seedling will be there is, it is characterized in that, have: change the spacing in the rows speed change gear A at plantation interval of seedling, this spacing in the rows speed change gear A possesses the operating rate of seedling-planting device 52 relative travel speeds is planted seed to the first eccentric gear 100 and the second eccentric gear 112 that carry out rapidly transmission to time in farmland at this seedling-planting device 52; And make this spacing in the rows speed change gear A carry out the spacing in the rows bar 123 of gear shifting operation, possesses restraint device 123b, it is arranged on spacing in the rows bar 123 and centered by rotating shaft 123e and rotates, if the spacing in the rows being obtained by spacing in the rows bar 123 is operated to a side of widely setting, the front end of this restraint device 123b is connected to one end of the base portion of gear lever 124, thereby restriction gear lever 124 is to the speed change of high-speed side.

Have again, in this manual, the fore-and-aft direction of seedling transplanter is referred to as to front side, direction of retreat, will be referred to as left side, right side towards the left and right directions of direction of advance.

Usually, in the time that the plantation interval (spacing in the rows) of seedling is widely set, in order to make the working trajectory of the instrument of planting seedlings suitable, the operating rate of the travel speed of seedling-planting device 52 relative seedling transplanters makes to rapid transmission seedling-planting device 52 work plant seedlings in the time planting seedlings to farmland, but because the action of seedling-planting device is due to the first eccentric gear 100 and the second eccentric gear 112 and sometimes fast and sometimes slow, so the transmission of seedling-planting device is pulsed.In addition, in the time that seedling transplanter advances at utmost speed, be exaggerated because the operating rate of seedling-planting device changes, so the difference of height of the variation of the operating rate of seedling-planting device becomes greatly, it is large that pulsation also becomes.

But, the invention of recording according to scheme one, in the time that spacing in the rows is widely set, restraint device 123b restriction gear lever 124, to the movement of a side at a high speed, because restriction is to the speed change of high-speed side, thereby suppresses to pulse and improves plantation precision.

Brief description of the drawings

Fig. 1 is the end view of riding type rice transplanter.

Fig. 2 is the vertical view of riding type rice transplanter.

Fig. 3 is the major part end view of the portion of planting seedlings.

Fig. 4 is the major part rearview of the supporting construction of seedling carrying base.

Fig. 5 is the major part vertical view of the portion of planting seedlings.

Fig. 6 is the figure of the explanation upper-lower position adjusting rod of rotor and the engaging relation of beam parts.

Fig. 7 is the expansion cutaway view of clutch housing of planting seedlings.

Fig. 8 is end view (Fig. 8 (a)) and the stereogram (Fig. 8 (b)) of the installation portion of spacing in the rows bar and gear lever.

Fig. 9 is the figure of the annexation of the secondary gear lever of explanation and vehicle-speed limit arm

Figure 10 is near major part end view seedling carrying base.

Figure 11 is the key diagram of the mounting structure of one-way clutch.

Figure 12 represents the chain of transmission enclosure interior of the portion of planting seedlings and the figure of the mounting structure of bolt.

Figure 13 represents the chain of transmission enclosure interior of the portion of planting seedlings and the figure of the mounting structure of bolt.

Figure 14 is fuel tank and the end view (Figure 14 (a)) of its guard block part and the stereogram (Figure 14 (b)) of guard block.

In figure:

1-riding type rice transplanter, 2-running vehicle body, 20-engine, 100-the first eccentric gear, 112-the second eccentric gear, 123-spacing in the rows bar, 123b-vehicle-speed limit arm, 124-gear lever, A-spacing in the rows speed change gear.

Embodiment

Below, based on accompanying drawing, the preferred embodiment of the present invention is described.

Fig. 1 and Fig. 2 are as the end view of the riding type rice transplanter of one embodiment of the present of invention and vertical view.Riding type rice transplanter 1 is liftably provided with the portion of planting seedlings 4 at the rear side of running vehicle body 2 by lifting linking member device 3, is provided with in order to make the not guard block 5 under slave body drop of operator at the rear portion of running vehicle body 2 upside.

Running vehicle body 2 is to possess as the front-wheel 10,10 of a pair of left and right of driving wheel and the four-wheel drive vehicle of the trailing wheel 11,11 of a pair of left and right, dispose gearbox body 12 in the front side of body, be provided with front-wheel end housing 13,13 in the side, left and right of this gearbox body 12, from can change this left and right front-wheel end housing 13,13 steering each front wheel supporting portion outwards outstanding left and right front-wheel axletree be separately installed with left and right front-wheel 10,10.In addition, be fixed with the leading section of mainframe 15 in the back part of gearbox body 12, at the left and right, rear end of this mainframe 15 central portion, taking front and back, the horizontally disposed trailing wheel axis of rolling supports rear wheel gear housing 18,18 freely as fulcrum rolls, and from the outside outstanding axletree of rear wheel of this rear wheel gear housing 18,18, trailing wheel 11,11 is being installed.

Engine 20 is mounted on mainframe 15, and the rotary power of this engine 20 is delivered to gearbox body 12 by belt driver 21 and as the Hyaulic infinite variable speed mechanism (HST) 23 of speed change gear.The rotary power that is delivered to gearbox body 12 is separated into driving dynamics and outside outputting power output after the not shown driving dynamics speed change gear speed change by this gearbox body 12.And when a part for driving dynamics is delivered to front-wheel end housing 13,13 and drives front-wheel 10,10, remainder is delivered to rear wheel gear housing 18,18 and drives trailing wheel 11,11.In addition, outside outputting power is transferred to the clutch housing 25 that plants seedlings of the rear side that is arranged on running vehicle body, then by the power transmission shaft 26 that plants seedlings to the portion's of planting seedlings 4 transmissions.

The top of engine 20 covers with hood 30, is provided with seat 31 thereon.There is the front shroud 32 of in-built various operating mechanisms in the front at seat 31, be provided with above it the steering wheel 34 that front-wheel 10,10 is carried out to steering operation.The left and right sides, lower end of hood 30 and front shroud 32 is as horizontal floor step 35.Floor step 35 is made part clathrate (with reference to Fig. 2), on this floor step on 35 on the operator's of walking footwear with mud can fall in farmland.Rear portion on floor step 35 is as the backward step 36 that doubles as rear guard.

In addition, in the anterior left and right sides of running vehicle body 2, the seedling carrying base for subsequent use 38,38 of placing in advance supply seedling is arranged on rotationally the position of stretching out to side than body and leaves on the position of inner side.

Lifting linking member device 3 is parallel rod structures, has a upper connecting rod 40 and a pair of left and right lower link 41,41.On these, connecting rod 40 and lower link 41,41 its base portion side are rotated and are arranged on freely the backsight of erectting the rearward end that is arranged at mainframe 15 and are on the connecting rod pedestal 42 of a font, connect longitudinal rod 43 in its front.And, insert in the bottom of longitudinal rod 43 and be connected with rotation and be supported on freely the connecting axle 44 in the portion of planting seedlings 4, and centered by connecting axle 44 freely rough ground connect the portion 4 of planting seedlings.Be provided with lifting hydraulic cylinder 46 being fixed on the support component on mainframe 15 and being integrally formed between the leading section of the rocking arm (not shown) on connecting rod 40, by make this lifting hydraulic cylinder 46 flexible with hydraulic pressure, thereby upper connecting rod 40 rotates up and down, the portion 4 of planting seedlings is to keep almost certain posture lifting.

The portion 4 of planting seedlings is the structure of 8 drillings, and possesses: the transmission housing 50 that doubles as frame; Seedling carrying base 51, its placing blanket shape seedling and carry out left and right move back and forth and by seedling one strain strain be supplied to each drilling seedling conveying end 51a ... time by the seedling of a horizontal row amount be all supplied to seedling conveying end 51a ... time, by send seedling band 51b ... seedling is transplanted on to below; To be supplied to seedling conveying end 51a ... seed plant to the seedling-planting device 52 in farmland, And the body route of next stroke is drawn in to the lead-in wire concentrator marker 53 etc. of the lip-deep a pair of left and right of soil.

Bottom in the portion of planting seedlings 4 arranges central rice transplanter hull 55 in central authorities, rice transplanter hull 57 and side rice transplanter hull 56 in the middle of arranging respectively in its left and right sides.While body being advanced under the state that makes the mud face that contacts farmland as the central rice transplanter hull 55 of these rice transplanter hulls, middle rice transplanter hull 57 and side rice transplanter hull 56, central rice transplanter hull 55, middle rice transplanter hull 57 and side rice transplanter hull 56 carry out smooth time sliding to mud face, on its smooth track by seedling-planting device 52 ... plant seedlings.Each rice transplanter hull of central authorities' rice transplanter hull 55, middle rice transplanter hull 57 and side rice transplanter hull 56 with the concavo-convex of soil surface, the corresponding farmland of front up and down moving mode rotate and install freely, in the time planting seedlings operation, the front portion of center rice transplanter hull 55 is moving up and down to be detected by angle of attack control sensor (not shown), according to its testing result, the hydraulic valve of the above-mentioned lifting hydraulic cylinder 46 of switching controls makes the portion's of planting seedlings 4 liftings, thereby the planting depth of seedling is always remained fixing.

Be provided with guard block 5 at the rear at seat 31, even if operator takes advantage of carry out operation on backward step 36 time, also can not fall from body.

The first rotor 27b and the second rotor 27a as an example of flattening device is installed in the portion of planting seedlings 4.In addition, seedling carrying base 51 is the structures of sliding at left and right directions the support rotor 65a of the rectangle support frame 65 of the left and right directions of portion's 4 entirety of planting seedlings in support and above-below direction width maximum as guide rail.

The end view of Fig. 3 and the rearview of Fig. 4 4(of portion that represents to plant seedlings does not represent the concentrator marker 53 that goes between) and the major part of rotor supporting structure, Fig. 5 represents the major part vertical view of the first rotor 27b and the second rotor 27a and central rice transplanter hull 55, middle rice transplanter hull 57 and side rice transplanter hull 56 and seedling-planting device 52 parts.

On rotor supporting structure, be provided with upper end is rotated to beam parts 66 on the dual-side parts 65b of above-mentioned support frame 65 that is supported on freely seedling carrying base 51, is fixed on the support arm 67 on the two ends of these beam parts 66 and rotates the Rotor carriage 68 being arranged on freely on this support arm 67.The first driving shaft 70b and the second driving shaft 70a of the first rotor 27b and the second rotor 27a are installed in the lower end of this Rotor carriage 68.In addition, near the bottom of this Rotor carriage 68, be connected to rotation and be arranged on freely the attaching parts 71 on transmission housing 50.

As shown in Figure 5, due to the relation of the allocation position of central rice transplanter hull 55, middle rice transplanter hull 57 and side rice transplanter hull 56, the first rotor 27b that is positioned at central rice transplanter hull 55 fronts is configured in front than the second rotor 27a in the front of rice transplanter hull 57 in the middle of being positioned at and side rice transplanter hull 56.Thus, the power to the second driving shaft 70a of the second rotor 27a is from the gear in the rear wheel gear housing 18 of trailing wheel 11 by universal joint 72 transmission such as grade, and the first driving shaft 70b of the first rotor 27b carries out transmission of power from the end of the body inner side of the second driving shaft 70a of the second rotor 27a and respectively from a pair of chain (not shown) in a pair of left and right chain housing 73,73 of transferring power.

Dispose support arm 67 by the rear of tire 11a, the 11b of each three, trailing wheel 11 that 11c forms respectively in left and right, support arm 67 and support the second driving shaft 70a at the rear of trailing wheel 11 and the first rotor 27b and the second rotor 27a are carried out to tire 11a, 11b, the 11c inter-engagement of each three in left and right of the Rotor carriages 68 of up-down adjustment, thus the graft union of this Rotor carriage 68 and beam parts 66 can not interfere with trailing wheel 11.

In addition, the first driving shaft 70b of the first rotor 27b of body central portion is only supported by a pair of left and right chain housing 73,73, so in order to strengthen chain housing 73,73, be provided with the strengthening part 74 that the chain housing 73,73 of a pair of left and right is carried out to bridge joint.

Have, the first rotor 27b utilizes upper end be supported on first connecting rod parts 76 and the second connecting rod parts 77 on beam parts 66 and hanging by spring 78 again.

These first connecting rod parts 76 and second connecting rod parts 77 are fixed and are supported on respectively the second connecting rod parts 77 that first connecting rod parts 76 on beam parts 66 and one end rotate on the other end that is connected to freely these first connecting rod parts 67 and form by one end, at the other end of these second connecting rod parts 77 with rotate between the installation sheet 74a being supported on freely on strengthening part 74 and be connected with above-mentioned spring 78.

By the first rotor 27b and the second rotor 27a, by Rotor carriage 68 and support arm 67 and beam parts 66 and realize at upper-lower position and regulating with upper-lower position adjusting lever 81, Fig. 6 represents the engaging portion of beam parts 66 and upper-lower position adjusting lever 81.The A-A line of Fig. 6 (a) presentation graphs 4 cuts open facing view, and Fig. 6 (b) represents the end view of observing from the arrow A direction of Fig. 6 (a).

The bottom of upper-lower position adjusting lever 81 is " コ " shape linkage component 83 by section is connected with the bar 84 that connects in the horizontal direction this linkage component 83.This linkage component 83 is combined with bar projection 82 one.In addition, bar projection 82 is L font plate 82a by side-looking and forms with the surface plate 82b of this L font plate 82a one, is provided with at the central portion of L font plate 82a the axial region 85 being supported on support frame 65, and L font plate 82a rotates being supported on axial region 85 freely.In addition, the surface plate 82b of bar projection 82 be configured to contact from the outstanding protuberance 66a of beam parts 66 as the cylindrical portion of the roller 86 of rotating shaft.

Therefore, in the time that upper-lower position adjusting rod 81 is rotated to the arrow S direction of Fig. 4, because the surface plate 82b of bar projection 82 boosts roller 86, so beam parts 66 are moved upward.Now, roller 86 is because rotation contacts with the surface plate 82b of bar projection 82 time, thus can realize the reduction of the service load of upper-lower position adjusting lever 81, so and owing to being that rotary body can frictionally not guaranteed good operability.And, because bar projection 82 is rotated up and down, this bar projection 82 using with the mode engaging that protuberance 66a is contacted as the cylindrical portion of the roller 86 of rotating shaft, so this protuberance 66a utilizes the rotation of upper-lower position adjusting lever 81 to body right-hand (the arrow S direction of Fig. 4), and beam parts 66 are upwards moved.Utilize the above-mentioned moving of this protuberance 66a, also upwards rotate centered by beam parts 66 end first connecting rod parts 76 and contrary with the connecting portion of beam parts 66 side.Due to the rotation upwards of these first connecting rod parts 76, the first rotor 27b also can rise upward by second connecting rod 77 and spring 78.If the first rotor 27b is moved up, the second rotor 27a also moves up by the first driving shaft 70b and the second driving shaft 70a simultaneously.

Have again, because upper-lower position adjusting lever 81 is arranged on the substantial middle portion of running vehicle body 2, so carrying out the moving occasion up and down of the first rotor 27b and the second rotor 27a, easily obtain the balance of left and right.

In addition, due to the rotation to arrow T direction (Fig. 3) by support arm 67, Rotor carriage 68 is moved upward, so can make the first rotor 27b and the second rotor 27a move to deposit position in the inside of seedling carrying base 51 side and in storage configuration.

In the present embodiment, the first rotor 27b and the second rotor 27a that the normal place at upper-lower position adjusting lever 81 can be positioned to 40mm height from farmland face are set as, rotate by the arrow S direction to Fig. 4, thereby comparable standard position exceeds maximum 15mm, direction by from the arrow S opposite direction to Fig. 4 is rotated, thereby comparable standard position is low to maximum 15mm.

As shown in Figure 4, the second side driving shaft 70a1, the 70a1 that rotor extends driving shaft that become that is used in as the second smooth rotor 27a1 in side, the 27a1 of the smooth rotor in multiple outsides of the left and right sides that left and right directions extends supports, this second side driving shaft 70a1,70a1 are releasably arranged on and more lean on the second driving shaft 70a, the 70a of central portion upper, make the second smooth rotor 27a1 in side being detachably arranged on this second side driving shaft 70a1,70a1, the structure of 27a1.

According to said structure, in the time seedling transplanter being left in to the occasion in warehouse or is deposited on truck, by outermost two ends, left and right the second side driving shaft 70a1,70a1 be arranged on the unified dismounting of the second smooth rotor 27a1 in side, 27a1 on this second side driving shaft 70a1,70a1, can dwindle body left and right width.

In addition, in the time that seedling transplanter is advanced, accumulate in mud and the water etc. in farmland in the front of the first rotor 27b and the second rotor 27a to overwhelm the mobile occasion of mode of the seedling of adjacent plantation from two ends outsides, take off the second side driving shaft 70a1 at two ends, left and right, 70a1 and be arranged on this second side driving shaft 70a1, the second smooth rotor 27a1 in side at the two ends on 70a1, 27a1, dwindle body left and right width, by pulling open the second rotor 27a of inner side, left and right, the distance that 27a and adjacent kind are planted seedlings, thereby be adjustable as the mudflow being caused by the first rotor 27b and the second rotor 27a and can not affect seedling.

Fig. 7 represents the expansion cutaway view planting seedlings in clutch housing 25 of the rice transplanter of the present embodiment.In the clutch housing 25 that plants seedlings of Fig. 7, be provided with the spacing in the rows speed change gear A of following formation.

, the clutch 91 that plants seedlings is delivered to power shaft 92 from gearbox body 12 by power transmission shaft by power.Be arranged at two ends be rotated be supported on freely on the power shaft 92 planting seedlings on clutch housing 25 and one be configured in side by side first gear 95 in locational large footpath and second gear 96 in middle footpath sliding freely spline fitted on power shaft 92, then have on power shaft 92 movable fit to have the 3rd gear 97 of path.On the relative side of above-mentioned the second gear 96 and the 3rd gear 96, be respectively equipped with the 3rd clutch claw 96a and the four clutches pawl 97a that work in coordination.In addition, be fixedly connected with the 4th gear 99 and the first eccentric gear 100 in input part one side of power shaft 92.

In addition, on the position parallel with power shaft 92, dispose output shaft 101, its one end can be connected to engaging aftermentioned and plant seedlings clutch support axle 91a above, and this clutch support axle 91a that plants seedlings connects and plants seedlings clutch housing 24 and be connected to by being arranged on the second outside universal joint 101 the 4(Fig. 1 of portion that plants seedlings) on.

On output shaft 101, be provided with the 5th gear 104 and the 7th gear 108 in the 6th gear 105 of path and the middle footpath of one and the octadentate wheel 109 in large footpath that are always engaging with the 4th gear 99 of above-mentioned power shaft 92, these the 6th gears 105, the 7th gear 108 and octadentate are taken turns 109 movable fits on output shaft 101.In addition, at the input one side spline fitted variable speed switch clutch 110 of output shaft 101, and at chimeric the second eccentric gear 112 always engaging with the first eccentric gear 100 of power shaft 92 of clutch housing 25 1 side clearances that plant seedlings.Form variable speed gear unit by this first eccentric gear 100 and the second eccentric gear 112.

In addition, be provided with the 6th clutch claw 110a and the 7th clutch claw 110b in the two sides of variable speed switch clutch 110, at a side the 6th clutch claw 110a when being positioned at the 5th clutch claw 104a engaging of the 5th gear 104 on output shaft 101, by the driving force of inputting from power shaft 92 being exported to the portion of planting seedlings 4 via variable speed switch clutch 110 with any of the 6th gear 105, the 7th gear 108 and the octadentate wheel 109 of the 5th gear 104 one of output shaft 101.In addition, another the 7th clutch claw 110b of variable speed switch clutch 110 can be arranged on to engaging on the clutch claw (not shown) of second eccentric gear 112 of spline fitted on output shaft 101.In the time of the 7th clutch claw 110b of variable speed switch clutch 110 and the clutch claw engaging of the second eccentric gear 112, transmission of power is delivered to the seedling-planting device 52 of the portion of planting seedlings 4 by output shaft 101 and the clutch support axle 91a that plants seedlings with variable speed from power shaft 92.

In addition, spacing in the rows speed change switching mechanism 115 is arranged on the position parallel with power shaft 92, and the space 25a cylindraceous that can move in the direction parallel with this power shaft 92 is arranged on and plants seedlings in clutch housing 25.And, in this spacing in the rows speed change switching mechanism 115, be adjacent to be provided with from switching mechanism operative end successively from low speed side to four the first groove 115a corresponding to high-speed side, the second groove 115b, the 3rd groove 115c and the 4th groove 115d, in addition, due to be communicated with the cylindric space 25a that can move of above-mentioned spacing in the rows speed change switching mechanism 115 and be arranged on this space cylindraceous 25a orthogonal direction on the cylindrical portion of the clutch housing 25 that plants seedlings in be provided with ball 116 and the 3rd spring 117 to the center axis reinforcing of spacing in the rows speed change switching mechanism 115 to this ball 116, so in the time that the half of ball 116 is embedded in the first groove 115a of above-mentioned spacing in the rows variable-speed conversion device 115, spacing in the rows variable-speed conversion device 115 becomes and cannot move, in addition, make following structure: in the time that trying hard to recommend of the active force to exceed this ball 116 and the 3rd spring 117 drawn the switching mechanism 115 of spacing in the rows speed change, the half of ball 116 is embedded into the second groove 115b as other groove of spacing in the rows speed change switching mechanism 115, in any of the 3rd groove 115c and the 4th groove 115d, and on this position, keep spacing in the rows speed change switching mechanism 115.

In addition, because at movable fit, the one on power shaft 92 is configured in each other side by side engaging between locational the first gear 95 and the gear 96 in middle footpath and is fixedly connected on the plate 115e in spacing in the rows speed change switching mechanism 115, so by making spacing in the rows speed change switching mechanism 115 front and back action taking body direction of advance as benchmark, and can make first gear 95 and second gear 96 of spline fitted on power shaft 92 move up at right and left integratedly by plate 115e.

The variable speed handover operation instrument 119 that variable speed switch clutch 110 use are arranged on the outside of the clutch housing 25 that plants seedlings is free to slide in arrow (I) or (II) direction of Fig. 7.

In addition, in the clutch housing 25 that plants seedlings of the output end side of output shaft 101, be provided with the clutch 91 that plants seedlings, the clutch support axle 91a that plants seedlings that one end is supported on to the clutch 91 that plants seedlings on the inwall of the clutch housing 25 that plants seedlings always carries out reinforcing to the clutch 91 that plants seedlings to the second spring 91b of the central part side reinforcing of the clutch housing 25 that plants seedlings.In addition, make the end of housing central part side of the clutch 91 that plants seedlings and the output end of output shaft 101 and can mutually utilize the structure of first clutch pawl 91c and second clutch pawl 101a engaging.In addition, make to plant seedlings clutch 91 to the inclined wall 91e that the output end of the clutch housing 25 that plants seedlings moves and output shaft 101 directions tilt relatively owing to being provided with the active force that utilizes the pushing of pin 91d of planting seedlings to exceed the second spring 91b on the peripheral part of clutch 91 that plants seedlings, thereby become the structure of the engaging of second clutch pawl 101a and the first clutch pawl 91c clutch 91 that plants seedlings of the output end of removing above-mentioned output shaft 101.

The spacing in the rows speed change of utilizing the drive mechanism of the spacing in the rows speed change gear A of above-mentioned formation to be achieved as follows.

First, remove the pushing of the clutch that plants seedlings being obtained by the on-of pin 91d that plants seedlings, utilize the active force of the second spring 91d to make in advance to plant seedlings clutch 91 engagings on output shaft 101.

Secondly, make in advance the 5th clutch claw 104a engaging of the side of the 5th gear 104 on the 6th clutch claw 110a and the output shaft 101 of variable speed switch clutch 110, make spacing in the rows speed change switching mechanism 115(spacing in the rows speed changer) in the time that ball 116 enters into the state of the first groove 115a of illustrated high-speed side, if variable speed handover operation instrument 119 makes switching mechanism 121 move to arrow (II) side, if the 6th gear 105 on the first gear 95 and the output shaft 101 on power shaft 92 is engaged, by the 6th gear 105 and variable speed switch clutch 110 and via output shaft 101, the clutch 91 that plants seedlings is carried out to transmission of power the most at a high speed.

In addition, in the time utilizing variable speed handover operation instrument 119 to make switching mechanism 121 near arrow (II) side, if the switching mechanism 115 of spacing in the rows speed change enters the state in the second groove 115b that illustrated the first groove 115a is the most at a high speed adjacent in ball 116, utilize plate 115e to right-hand slip, the 7th gear 108 on the second gear 96 and output shaft 101 on power shaft 92 engages, and via output shaft 101, the clutch 91 that plants seedlings is carried out to transmission of power with the second high speed from variable speed switch clutch 110.

Have again, in the time that variable speed handover operation instrument 119 makes switching mechanism 121 near arrow (II) side, if the switching mechanism 115 of spacing in the rows speed change enters the state from the 3rd groove 115c of the 3rd of illustrated the first groove 115a in ball 116, the 3rd clutch claw 96a of the second gear 96 on power shaft 92 and the four clutches pawl 97a engaging of the 3rd gear 97, octadentate wheel 109 engagements on the 3rd gear 97 and output shaft 101, by the 7th gear 108, the 6th gear 105, the 5th gear 104, variable speed switch clutch 110 also carries out the transmission of power of the high speed of the 3rd to the clutch 91 that plants seedlings via output shaft 101.

In addition, make switching mechanism 121 to arrow (I) side shifting at variable speed handover operation instrument 119, and while making the switching mechanism 115 of spacing in the rows speed change enter state in the 4th groove 115d of illustrated lowest speed to ball 116 to move, take turns 109 transmissions by the octadentate on the 3rd gear 97 and output shaft 101 on power shaft 92, there is again the 4th gear 99 on the 5th gear 104 and the power shaft 92 on output shaft 101 to engage, the second eccentric gear 112 on the first eccentric gear 100 and output shaft 101 from the power shaft 92 always engaging and variable speed switch clutch 110 via with the plant seedlings transmission of power of lowest speed of clutch 91 of the output shaft 101 of these variable speed switch clutch 110 unitary rotation.

Owing to utilizing the engagement of the first eccentric gear 100 and the second eccentric gear 112, seedling-planting device 52 compared with when planting seedlings when work in addition operating rate slack-off, so carry out variable-speed motion.

Usually, for example, in the time setting spacing in the rows with wider interval, owing to planting seedlings with variable speed state, so the clutch 91 that plants seedlings is pulsed, especially, in the time advancing at utmost speed, pulsation easily increases.

So, in the present embodiment, as shown in the stereogram of the end view of Fig. 8 (a) and Fig. 8 (b), the spacing in the rows bar 123 on right side at seat 31 that is configured in body is operated and then makes spacing in the rows when broadening a side shifting taking center of rotation 123d as fulcrum to arrow C direction, make the spacing in the rows speed change switching mechanism 115 shown in Fig. 7 move to appropriate location (ball 116 enters into the 4th groove 115d of Fig. 7) with the arm 123a of spacing in the rows bar 123 one, fixedly the plant seedlings operating position of clutch 91, simultaneously by making as restraint device, be connected on one end of base portion of the gear lever 124 in the speed change region of setting driving transmission with the front end of the vehicle-speed limit arm 123b of spacing in the rows bar 123 one, thereby the shake centered by axis of rocking 124a of restriction gear lever 124, restricted speed, make the stabilisation of planting seedlings.

In addition, adopt following structure:, the operation speed interval speed change of manually selecting the Hyaulic infinite variable speed mechanism 23 that is used as speed change gear by gear lever 124 to set is that secondary gear lever 125(between arbitrary speed-change area of secondary speed-changing device of high, medium and low any is with reference to Fig. 9) and when planting seedlings between the speed-change area of operating speed used speed change become the translational speed between the speed-change area when travelling in road, can remove vehicle-speed limit.

Fig. 9 represents the structure of for this reason making, in the time that secondary gear lever 125 is translational speed to the arrow D direction operation of Fig. 9 and from plantation speed speed change, by metal wire 126, the vehicle-speed limit arm 123b being arranged on spacing in the rows bar 123 rotates to arrow B direction (Fig. 8, Fig. 9) centered by its rotating shaft 123e, vehicle-speed limit arm 123b from the moving area M of the gear lever 124 shown in Fig. 8 to the left and right direction leave, thereby can remove vehicle-speed limit.

Have again, as shown in Figure 8, above-mentioned rotating shaft 123e is supported on one end from the pronathous protuberance 123f of spacing in the rows bar 123, even if with the rotary support cylinder 123c of portion of metal wire 126 tractives and vehicle-speed limit arm 123b one also can be afterburning to rotate when turning back to the state shown in Fig. 8 (b) supported freely to it by not shown spring.

In order to make to send seedling band 51b to move to farmland direction, on seedling carrying base 51, be provided with the driving shaft with the supply roll 60(pulley 64 of one-way clutch), shown in the major part resolution chart of the seedling carrying base 51 representing as Figure 10, make to send the supply roll 60 use linkages of seedling band 51b action to be connected with the seedling countershaft 62 that send of disposed adjacent., at the base portion that send fixed joint armshaft 62a on seedling countershaft 62, on the leading section of this countershaft arm 60a, rotate freely and connect and send one end of seedling arm 60b, this send the other end of seedling arm 60b to rotate the feed shaft sheet 60a being fastened on freely on supply roll 60.In addition, in order to make auxiliary 62a because being no more than fulcrum with the annexation of sending seedling arm 60b, be provided with and prevent from exceeding block 63 for dead point sending near seedling countershaft 62.Therefore, send the hunting range (arrow E) of seedling countershaft 62 to be no more than the confined while of scope of fulcrum, by sending seedling arm 60b can make supply roll 60 move (pendulum angle of the pendulum angle < arrow F of arrow E) in hunting range (arrow F).

Owing to utilizing said structure that the hunting range of sending seedling countershaft 62 is limited in the scope that is no more than fulcrum, thus when preventing from exceeding dead point by strengthening the hunting range of supply roll 60 with linkage, thereby can obtain the large seedling amount of sending with little space.All the time, owing to not setting and preventing from exceeding the such hunting range of fulcrum with block, so linkage itself must not be constant large.

In addition, as shown in the stereogram of Figure 11, by the spring 60c with active force that returns to arrow C direction that gives supply roll 60 is set in advance on the one-way clutch of supply roll 60, thereby there is the effect that easily makes supply roll 60 reset to original position.

Not shown drive division in transmission housing 50 passes through drive chain 47 transferring power shown in Figure 12 to seedling-planting device 52, and this drive chain 47 utilizes the leaf spring 48 being supported on transmission housing 50 can adjust the tension force degree of drive chain 47.

In addition, by make simultaneously from the outside of transmission housing 50 to inner and with the orthogonal direction of drive chain can insert leading section and leaf spring 48 butts of the bolt 49 of dismounting, thereby the tension force degree of capable of regulating drive chain 47.

So, keep drive chain 47 by the tension state with suitable with bolt 49, thereby can prevent the lax of unwanted drive chain 47, can improve the action pulsation of seedling-planting device 52.

In addition, as shown in figure 13, can also make from the outside of transmission housing 50 to inner and with the orthogonal direction of drive chain 47 can insert the leading section of dismounting ground construction bolt 49, and run through the hole of lock nut 45 for bolt stop, and the structure of sealing with cap 45a.

In addition, as shown in figure 14, fuel tank 28 can also be installed in body front, then bumper portion before body arranges the parts that double as fuel tank guard block 2a and the auxiliary step 2b of boarding.By adopting this structure, can obtain the beneficial effect of equipment cost reduction and outward appearance aspect.

In addition; by by being arranged on, boarding on the fuel tank guard block 2a height of auxiliary step 2b is arranged on official's altitude datum of secure authentication etc. and the fuel supply port 28a(of fuel tank 28 comprises pipeline portions) smallest height between, thereby when can breaking away from the official altitude datum of secure authentication etc., also can prevent the breakage of the fuel supply port 28a of fuel tank 28.

Utilizability in industry

According to the present invention, also can provide the effective seedling transplanter of plantation precision even if can obtain obtaining wider spacing in the rows.

Claims

1. a seedling transplanter, has: running vehicle body (2); Be mounted in the engine (20) on this running vehicle body (2); To carrying out speed change from the power of this engine (20) and changing the speed change gear (23) of the travel speed of running vehicle body (2); And this speed change gear (23) is moved and change the gear lever (124) of travel speed, by thering is the rear portion that is attached at running vehicle body (2) to the portion of planting seedlings (4) of the seedling-planting device (52) of farmland planting seedling, it is characterized in that,

Have: change the spacing in the rows speed change gear (A) at plantation interval of seedling, this spacing in the rows speed change gear (A) possess by seedling-planting device (52) relatively the operating rate of travel speed seed is planted to the first eccentric gear (100) and the second eccentric gear (112) that carry out rapidly transmission to time in farmland at this seedling-planting device (52); And

Make this spacing in the rows speed change gear (A) carry out the spacing in the rows bar (123) of gear shifting operation,

Possesses restraint device (123b), it is arranged on spacing in the rows bar (123) and above and centered by rotating shaft (123e) rotates, if the spacing in the rows being obtained by spacing in the rows bar (123) is operated to a side of widely setting, the front end of this restraint device (123b) is connected to one end of the base portion of gear lever (124), thereby restriction gear lever (124) is to the speed change of high-speed side.