JPH09220017A - Steering mechanism of grass collecting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an inside wheel from stepping on a windrow at the time of turning when grass is collected by towing the grass collecting machine by a tractor. SOLUTION: A turning fulcrum A is provided at the right-left intermediate position on the rear end side of a mast frame 1 and a front tie rod fulcrum D is provided at a position deviating from the turning fulcrum A to one right or left side. The rear end part of a center frame 2 which supports right and left rake rotors 5 and 5 and has its front end part coupled with the turning fulcrum A so as to turn to the right and left is connected to a rear turning fulcrum B provided at a position deviating forward from the axial line between right and left wheels 30 and 31 so that it freely turns to the right and left. Its shaft frame 3 is provided with a rear tie rod fulcrum C at a position deviating from the said rear turning fulcrum B to the other left or right side on the front end side, a tie rod 7 is extended between this fulcrum C and front tie rod fulcrum D provided to the said mast frame 1, and the wheels 30 and 31 are pivoted on the shaft frame 3 in a freely rotatable state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention collects grass sown in a row in a row where grass cultivated and vegetated in a field is cut by a reaper. The present invention relates to an improvement of a steering mechanism for restricting the traveling of the body of the grass collector following the tractor in a grass collector used to drive the tractor by connecting and pulling the tractor.

[0002]

2. Description of the Related Art Generally, a grass catcher of the above-described type has a connecting hitch a such as a two-point link hitch composed of left and right rear links, behind a vehicle body of a tractor T, as shown in FIG. And connect the mast frame 1 to the turning fulcrum A
A center frame 2 that swings freely to the left and right is connected via a wheel, and a rear end of the center frame 2 is connected to a saddle-shaped axle frame 3 that straddles a row of grasses (windrows) to be formed in the field in a rear view. Then, at both left and right end portions of the wheel 30,
31 are rotatably supported so as to be opposed to each other in the left-right direction, and a gear box GB is provided at an intermediate portion in the front and rear of the center frame 2.
Is provided, and rotor support frames 4 and 4 projecting left and right from both left and right ends thereof are provided, and cam cases 50 and 50 are provided at the respective tip ends thereof,
The rake rotors 5, 5 are mounted so as to freely swing around the cam case 50, and an input shaft b for transmitting rotational power to a transmission gear in the gear box GB is provided on the lower surface of the front end side of the center ram 2. Then, the PTO shaft provided on the body of the tractor T is transmitted to the input shaft b through the universal joint shaft, whereby the gearbox G
The rotational power transmitted to B is distributed by the transmission gears in the gear box GB, and the rotor support frame 4
4 is transmitted to the transmission mechanism in the cam case 50 via the drive shaft housed in the rake rotor 4, and the pair of rake rotors 5
5 are respectively driven and rotated around the cam cases 50, and during this rotation, the tine 510 having the rake arms 51 ... The cam mechanism provided in the cam case 50 controls so as to repeat the state of vertically hanging down to rake up and the state of falling rearward in the rotational direction of the rake rotor 5 so as to escape from the pasted grasses. Thus, by operating the tractor T, the tractor T is put into the field where the grass to be collected is cut down, and the pair of rake rotors 5 and 5 are run while rotating in the arrow direction in FIG. The grass collecting row 6 of the grass is formed between the rake rotors 5, 5.

With respect to the steering means of the grass hopper W when the grass tractor W is constructed as described above and the tractor T is connected and pulled to perform the grass grabbing work, as shown in FIG. The left and right wheels 30 and 31 which rotatably support the left and right ends of the axle frame 3 at the rear end of 2 are
The steering mechanism is not built in, and the center frame 2 is pulled along with the tractor T, so that the center frame 2 travels in the traveling direction of the tractor T.
As shown in FIG. 3, a rotary shaft that freely swivels with a vertical rotary axis is provided at both left and right end portions of the axle frame 3, and a left and right axle is provided at the lower end side of the rotary shaft. Mast frame 1 in which 30 and 31 are respectively supported by loose fitting, a tie rod c is connected to the rotating shaft via a bell crank and a connecting link, and a front end side of the tie rod c is connected to the center frame 2. By connecting to, the aircraft of the tractor T turns left and right,
Second steering means for automatically changing the traveling directions of the left and right wheels 30, 31 by changing the angle between the mast frame 1 and the tie rod c, and as shown in FIG. In addition to the above-described second steering means, there is a third means in which the center frame 2 and the connecting point (the turning fulcrum A) of the center frame 2 and the tip end portion of the tie rod c and the mast frame 1 are offset rearward. .

[0004]

In the steering means in the above-mentioned conventional grass catcher, steering wheels are not provided on the wheels 30 and 31 that pivotally support the left and right ends of the axle frame 3, and the mast of the center frame 2 is not provided. In the first means which is performed only by the turning operation with respect to the frame 1, as shown in FIG. 2, the turning radius R of the tractor T increases and the turning operation of the rear wheels t / t of the tractor T. The difference between the center line G1 of the tractor T1 and the center line G2 of the forming windrow 6 becomes large, which causes a problem that the tractor T is difficult to drive and drive.

In addition, the front end side of the center frame 2 is directly connected to the mast frame 1, and a steering mechanism is provided on each of the left and right wheels 30 and 31 that pivotally support the left and right ends of the axle frame 3. In this method, the turning radius R of the tractor T can be made small, but the difference between the turning center line G1 of the rear wheels t / t of the tractor T and the center line G2 of the windrow 6 to be formed is large. It is difficult to move, and from the locus H of the side edge on the windrow 6 side of the wheel 31 on the inside in the turning direction of the left and right wheels 30, 31 of the grass collector W to the edge j1 on the inside of the turn of the windrow 6. The gap K formed between the two becomes negative, and the wheel 31 on the inner side in the turning direction of the left and right wheels 30 and 31 of the grass collector W.
However, there is a problem that you are starting to step on Windrow 6.

In addition to the above-mentioned second means, means for forming the mast frame 1 in a shape projecting rearward and for offsetting the turning fulcrum A, which is a connecting point with the front end of the center frame 2, rearward is added. In the third means, the tractor T
The turning center line G1 of the rear wheels t and t coincides with the center G2 of the windrow 6 to facilitate driving, and the turning radius R of the tractor T can be reduced. The gap K formed between the locus H of the side edge on the windrow 6 side of the wheel 31 on the inside of the turning direction of the grass machine W and the edge j1 on the inside of the turning of the windrow 6 becomes negative, and The problem remains that the wheels 31 of the vehicle will step on the windrow 6.

This can be achieved by widening the gap between the left and right wheels 30 and 31, but even if this is attempted,
Since the width of the vehicle body when traveling on the road is regulated to 2500 mm by folding the left and right rake rotors 5, 5, the inner wheel 31 inevitably moves the windrow 6 by the limit of this dimension. The problem of getting stepped on remains.

The present invention has been made in order to solve the above-mentioned problems occurring in the conventional means, and in the grass collecting work performed by pulling the grass collecting machine W by the tractor T,
When turning, the turning radius is reduced and the tractor T
While the turning locus G1 of the center of the body of the vehicle is aligned with the centerline G2 of the windrow 6, the locus H of the side edge of the wheel 31 on the windrow 6 side and the windrow 6 of the wheel 31 on the inside in the turning direction of the grasshopper W. The gap K formed between the inner edge j1 and the inner edge j1 of the inner side of the vehicle becomes positive, and a new means is provided to prevent the inner wheel 31 from stepping on the windrow 6 when turning. To aim.

[0009]

In the present invention, as a means for achieving the above-mentioned object, a shape having an overhanging portion projecting rearward to the rear end side behind the machine body of the tractor T. The mast frame 1 formed in the above is connected through a connecting hitch a, and a turning fulcrum A is provided at the left and right intermediate portions on the rear end side of the mast frame 1, and the turning fulcrum A is displaced to the left or right side. The front tie rod fulcrum D is provided at the part to be
5, the rear end of the center frame 2 which connects the front end to the turning fulcrum A so that the front end of the axle frame 3 can be swung to the left and right, and the left and right wheels 30 and 31 at the left and right middle parts on the front end side of the axle frame 3.
Is connected to a rear turning fulcrum B provided at a position deviated to the front from the axis center line of the vehicle so as to be turnable left and right. A rear tie rod fulcrum C is provided at the position
And the front tie rod fulcrum D provided on the mast frame 1
The present invention proposes a steering mechanism in a grass weeder, which is characterized in that a tie rod 7 is bridged between the two and the wheels 30 and 31 are rotatably supported on both left and right sides of the axle frame 3.

[0010]

According to the means of the present invention configured as described above, the turning fulcrum A, which is a connecting point of the front end of the center frame 2 to the mast frame 1, is formed in a shape in which the mast frame 1 is projected rearward, and is offset rearward. As a result, the turning radius is reduced, and the front tie rod fulcrum D that is parallel to the fulcrum A and the rear tie rod that is parallel to the rear fulcrum B that connects the rear end of the center frame 2 and the axle frame 3 are arranged. By the operation of the tie rod d, which is bridged so as to cross the center frame 2 obliquely with the fulcrum C, the axle frame 3 is moved to the center frame 2 so as to advance the inside of the turning direction to the front in the traveling direction. On the other hand, by turning around the rear turning fulcrum B, the center locus G1 of the rear wheels t · t of the tractor T and the center of the windrow 6 come to coincide with each other, and the weeding machine W turns. The gap K formed between the locus H of the side edge on the windrow 6 side of the wheel 31 on the inside in the direction and the edge j1 on the inside of the turning of the windrow 6 becomes positive, and the wheel 30 31 will no longer step on Windrow 6.

[0011]

Next, an embodiment will be described in detail with reference to the drawings. In the drawings, the same reference numerals are used for components having the same effects as those of the conventional means.

FIG. 5 is a plan view of the grass collecting machine W according to the present invention before being connected to the tractor T, and FIG. 6 is the same as the grass collecting machine W in which the center frame 2 is rotated with respect to the mast frame 1. FIG. 7 is a plan view of a state in which the tractor T is connected and towed, and FIG.
In the figure, T is a tractor, t · t is the left and right rear wheels thereof, 1 is a mast frame, 2 is a center frame, 3 is an axle frame, and 4 is a lateral projection from the front and rear intermediate portions of the center frame 2. The rotor support frames 5 and 5 are rake rotors mounted on the respective tip portions of the left and right rotor support frames 4 and 4, and 8 is the lower surface side of the center frame 2 (may be the upper surface side). A three-way gearbox assembled at a portion closer to the front than the rotor support frame 4.4, d and d are a pair of output shafts 80 and 80 and drive shafts 52 and 52 of each cam case 50 of the rake rotor 5.5. Conductor shafts that were bridged between the two, A is the mast frame 1
A turning fulcrum provided on the left and right central portions of the rear end portion, B is a rear turning fulcrum provided on the left and right central portions of the front end side of the axle frame 3, and C is a lateral one on one side with respect to the rear turning fulcrum B. The rear tie rod fulcrum provided at the front end of the axle frame 3 after being positioned, D is the rear end side of the mast frame 1, and the turning fulcrum A
The front tie rod fulcrum mounted on the other side of the left and right sides, and 7 between the front tie rod fulcrum D and the rear tie rod fulcrum C is oblique to the center frame 2 in plan view. A tie rod that can be crossed over is shown.

The mast frame 1 is in the form of a two-point hitch that connects the left and right hitches 10, 10 on the front end side to the left and right lower links a, a provided on the rear surface side of the body of the tractor T. However, it is formed in a shape projecting rearward in plan view so that the position of the turning fulcrum A provided on the rear end side thereof is largely offset forward from the left and right hitch points 10 and 10 described above. There is.

The front tie rod fulcrum D provided on the rear end side of the mast frame 1 by being arranged on one of the left and right sides of the turning fulcrum A is provided at the center on the left and right of the rear end side of the mast frame 1. An arm 11 protruding laterally rearward is provided at a left side portion of the turning fulcrum A in a plan view, and the arm 11 is provided so as to be juxtaposed left and right with the turning fulcrum A at a protruding end thereof. I am doing it.

The center frame 2 is formed in the shape of a long girder rod in the front-rear direction, has a connecting portion on the front end side for connecting to the turning fulcrum A, and has a left and right portion on the lower surface side near the front end side. A gear box 8 for distributing and transmitting rotational power to the rake rotors 5 is formed in a triangular shape having an input shaft b and a pair of output shafts 80 on the left and right, and is installed.

Further, the rear end side of the center frame 2 is
It is connected to a rear turning fulcrum B provided on the front end side of the axle frame 3.

The axle frame 3 has wheels 30 and 31 mounted on both left and right ends thereof, respectively. When the wheels 30 and 31 are formed to straddle the windrow 6 on which the wheels 30 and 31 are formed, the axle frame 3 is provided on the upper surface of the windrow 6. Although it is a normal saddle-shaped member when viewed from the rear so as not to interfere with each other, a bracket 32 is provided at the left and right central portions on the front edge side, and a rear turning fulcrum B provided at the front end of the bracket 32 is provided at the above-mentioned center. Frame 2
By connecting with the rear end of the center frame 2, the center frame 2 can be turned to the left and right.

The bracket 32 is provided with an arm 320 projecting laterally forward in a branch shape at a portion which is offset to the right with respect to the rear turning fulcrum B, and a rear tie rod fulcrum is provided at the tip thereof. C is provided, and the tie rod 7 is bridge-connected between it and the front tie rod fulcrum D described above so as to cross the center frame 2 at an angle in a plan view. As shown in FIG. 2, when the vehicle turns around the turning fulcrum A with respect to the mast frame 1, the axle frame 3 is turned around the rear turning fulcrum B so that the inside in the turning direction moves forward.

Further, rotor support arms 4, 4 are provided at the front and rear intermediate portions of the above-mentioned center frame 2 so as to project laterally along the left and right directions, respectively, and the tip end side thereof is provided. The sliding arms 40, 40 are fitted so as to be adjustable in expansion and contraction.

The cam cases 50, 50 are supported by the protruding ends of the sliding arms 40, 40, respectively.
In addition, the rake rotors 5, 5 are rotatably supported, respectively, and a bearing wheel (not shown) for supporting the rake rotors 5, 5 is provided on the lower surface side of the cam cases 50, 50.

The rake rotor 5 has its central shaft portion supported by the cam case 50 for turning, and during the turning operation, a large number of control arms 51 that radially project are provided in the cam case 50. Under the control of a certain cam, the tines 510 provided at the tip are hung down in a vertical posture to scrape pasture grass, and a state of turning backward in the turning direction to escape from the pasture grass are alternately switched. It is a normal one that will be replaced. In order to drive those turning operations, the drive shaft 52 provided in each cam case 50 is formed so as to be adjustable in expansion and contraction on each of the output shafts 80, 80 protruding in a pair from the above-mentioned triangular gear box 8. It is performed by transmitting through the transmission shaft d.d.

The gearbox 8 for distributing and transmitting the rotational power transmitted from the PTO shaft of the tractor T to the input shaft b to the above-mentioned left and right rake rotors 5, 5, as shown in FIGS. , Through the bearing support cylinders 8b, on each of the three outer wall surfaces of the main body case 8a formed in a substantially triangular shape in a plan view, which are arranged substantially equally in three in a plan view,
Three shafts of an input shaft b and a pair of output shafts 80, 80 are mounted, and a transmission gear g1 provided at the inner end of the input shaft b and a transmission gear g2 constantly meshed with the transmission gear g2 are provided in the main body case 8a.
An intermediate shaft 81 that constantly rotates, a transmission gear g3 provided at the other end of the intermediate shaft 81, and a transmission gear g4 provided at the inner end of one output shaft 80 meshing with the gear g3. , The transmission gear g attached to the base end side of the intermediate shaft 81
2 and a transmission gear g5 that is provided on the inner end of the other output shaft 80 and that distributes and transmits the rotational power that is guided from the input shaft b to the pair of output shafts 80 and 80. The rotation directions of the shafts 80 and 80 are arranged to have a forward and reverse relationship.

Next, FIGS. 12 to 18 show another embodiment. In this example, the tractor T when the grass tractor W is retracted and connected to the tractor T and the grass tractor W is stored in the storage house by the operation of the tractor T is completed.
Is an example in which the steering mechanism can be releasably locked so that the operation of moving the grass catcher W to the predetermined position can be performed easily by moving backward.

Thus, in this example, the center frame 2 pivotally supports the rear end of the center frame 2 to the left and right through the bracket 32 provided on the axle frame 3 and the rear pivot fulcrum B. The rear end of the frame 2 is provided with a fixing member 90 for connecting to the axle frame 3 so as to form an integral rigid body, and a first fitting hole 91 for locking is provided on the front end side thereof. The branched arm 3 provided on the bracket 32 that is provided and is integral with the axle frame 3.
In the above-described embodiment, the lock pin 92, which is fitted in the first fitting hole 91 so that the lock pin 92 can be inserted into and removed from the first fitting hole 91, is slidably provided in the vertical direction at a position where the rear tie rod fulcrum C is provided. .

Then, the first fitting hole 91 is formed in the fixing member 90 so as to occupy a position for fitting with the lock pin 92 described above in a state where the center frame 2 is in a posture orthogonal to the axle frame 3. The center frame 2 and the axle frame 3 are integrally connected in an orthogonal state by fitting the fitting hole 91 and the lock pin 92.

The rear end side of the tie rod 7 is connected to a rear tie rod fulcrum C provided on the axle frame 3 side, and the tie rod 7 moves in the longitudinal direction, so that the axle frame 3 is turned rearward with respect to the center frame 2. The tie rod fulcrum C is pivoted to the left and right around the fulcrum B, and the rear tie rod fulcrum C is provided with a pivotal link 93 that freely pivots around the rear pivotal fulcrum B, and is attached to the pivot end thereof.

At the intermediate portion of the swing link 93, the lock pin 9 described above is provided during the rotation operation.
A second fitting hole 94 into which the lock pin 92 is removably fitted is provided at a position where the lock pin 92 overlaps with the second fitting hole. When fitted to 94, this turning link 93
However, the axle frame 3 is integrally connected to the axle frame 4, and the front and rear movements of the tie rod 7 cause the axle frame 3 to pivot left and right around the rear pivot fulcrum B.
By releasing the fitting between the lock pin 92 and the second fitting hole 94, even if the tie rod 7 moves back and forth, the turning link 9
Only the 3 turns around the rear turning fulcrum B, and the turning operation around the rear turning fulcrum B of the axle frame 3 is not performed.

Then, in this state, the first fitting hole 91 of the fixing member 90 provided on the rear end side of the center frame 2 is
When the rear end side of the center frame 2 is connected to the axle frame 3 so as to be an integral rigid body by fitting with the lock pin 92 provided on the bracket 32 on the axle frame 3 side, the turning of the tractor T is performed. By operation, the center frame 2
When the vehicle turns right and left around the turning fulcrum A, the turning operation is performed with the axle frame 3 integrally connected to the center frame 2.

Further, the lock pin 92 is slid up and down to be fitted into the first fitting hole 91 provided in the fixing member 90 and the second fitting hole 94 provided in the revolving frame 93. One of the upper end side and the lower end side of the lock pin 92 is engaged with the operation lever 920 provided on the body of the lock pin 92 so that the lock pin 92 is selected and fitted.
21 is provided in a guide tube portion 922 that guides sliding up and down.

Further, the fixing member 90 and the swing link 93 are distributed to the upper surface side and the lower surface side of the bracket 32 holding the lock pin 92 so that the above-mentioned selection can be performed by operating the lock pin 92 up and down. Be installed.

The axle frame 3 is fixed to the center frame 2 so that the movement of the axle frame 3 is not interlocked with the turning operation of the center frame 2 with respect to the mast frame 1, and the fixation of the axle frame 3 and the center frame 2 is released. do it,
This locking mechanism 9 is arranged so that the axle frame 3 is switched to a state in which the axle frame 3 turns with respect to the center frame 2 in conjunction with the turning operation of the center frame 2 with respect to the mast frame 1.
In the illustrated example, the center frame 2 and the front end side of the axle frame 3 are connected to each other via the rear swing fulcrum B so that the swing link 93 and the lock pin 92 are assembled. However, the same configuration may be incorporated in a portion where the mast frame 1 and the front end of the center frame 2 are connected to each other via the turning fulcrum A.

[0032]

As described above, in the steering mechanism of the grass catcher according to the present invention, the center frame 2 for supporting the left and right rake rotors 5 at the front and rear intermediate portions.
The front end of the tractor T is pivotally connected to the mast frame 1 mounted on the rear surface of the vehicle body of the tractor T via the connection hitch a, to a fulcrum fulcrum A which is installed on the frame 1 while being offset rearward. The rear end side of the center frame 2 and the axle frame 3 are also connected to each other by a rear turning fulcrum B so as to be turnable left and right, and between the axle frame 3 and the mast frame 1, one side of the turning fulcrum A is provided. With the front tie rod fulcrum D eccentric to and the tie rod fulcrum C eccentric to the other side of the rear turning fulcrum B, the tie rod 7 is bridged so as to cross the center frame 2 at an angle. When the center frame 2 turns around the turning fulcrum A with respect to the mast frame 1, the axle frame 3 turns around the rear turning fulcrum B with respect to the center frame 2 in the opposite direction to the turning direction. Because the are the turning radius R
Can be made smaller so that the center locus G1 of the rear wheels t / t of the tractor T coincides with the center line G2 of the windrow 6, and moreover, the windrow 6 side of the wheel 30 on the inner side in the turning direction of the grasshopper W. The gap K formed between the locus H of the side edge of and the edge j1 on the inside of the turn of the windrow 6 becomes positive,
It is possible to reliably prevent the wheels 30 and 31 of the grass collector W from stepping on the windrow 6.

Further, a swing link 93 which freely swings around the rear swing fulcrum B is incorporated in this steering mechanism,
A rear tie rod fulcrum C is provided at a pivot end of the axle frame 3 to connect the tie rods 7, a center frame 2 is provided with a fixing member 90, and a lock pin 92 which is alternately connected to the pivot member 93 and the pivot link 93. When the lock mechanism 9 provided with is installed, the lock pin 92 is connected to the swing link 93 during normal work, and the swing link 9 is connected.
By fixing 3 to the axle frame 3 side integrally, the steering mechanism can perform a predetermined operation, and when retracting the tractor T to store the grass weeder W in a predetermined place. By connecting the lock pin 92 to the fixing member 90 and allowing the turning link 93 to play, the center frame 2 is fixed to the axle frame 3 so that the left and right rake rotors 5 and 5 are folded to form an unstable posture. A grass weeder W
It can be stored backwards easily.

[Brief description of drawings]

FIG. 1 is a schematic plan view of an entire conventional grass collecting machine.

FIG. 2 is an explanatory view of the operation of the first embodiment of the steering means of the conventional grass catcher.

FIG. 3 is an explanatory view of the operation of the second embodiment of the steering means of the conventional grass catcher.

FIG. 4 is an explanatory view of the operation of the third embodiment of the steering means of the conventional grass catcher.

FIG. 5 is a plan view of a grass catcher for carrying out the present invention.

FIG. 6 is an explanatory view of an operation of a steering mechanism of the above grass catcher.

FIG. 7 is an explanatory view of an action at the time of turning operation during the grass-grabbing work of the above grass-hopper.

FIG. 8 is a plan view, partly cut away, of a gear box that distributes the rotational power of the grass catcher to the left and right rake rotors.

FIG. 9 is a sectional view of the same gear box taken along line I-II in FIG. 8.

10 is a cross-sectional view of the same gear box taken along the line I-III in FIG.

FIG. 11 is a vertical sectional view of a cam case of a rake rotor.

FIG. 12 is a plan view of a disassembled state of the lock mechanism portion of the steering mechanism of the grass catcher according to the present invention.

FIG. 13 is a vertical cross-sectional side view showing a state in which a lock pin of a main part of the lock mechanism unit is connected to a swivel frame.

FIG. 14 is a plan view of a main part of the lock mechanism section in the same state as above.

FIG. 15 is a vertical cross-sectional side view showing a state in which a lock pin of a main part of the lock mechanism unit is connected to a fixing member.

FIG. 16 is a plan view of a main part of the lock mechanism section in the same manner as above.

FIG. 17 is an explanatory view of the embodiment of the present invention, which does not include the locking mechanism of the grass collecting machine, at the time of storing work.

FIG. 18 is an explanatory view of the embodiment in which the lock mechanism of the grass catcher according to the present invention is equipped, at the time of storage operation.

[Explanation of symbols]

T ... tractor, t ... rear wheel, A ... turning fulcrum, B ... rear turning fulcrum, C ... rear tie rod fulcrum, D ... front tie rod fulcrum, W ... grass cutter, R ... turning radius, H ... windrow side Edge track, K ... Gap, a ... Connected hitch (lower link)
b ... input shaft, c ... tie rod, d ... conduction shaft, GB ... gear box, G1 ... turning path of center of body, G2 ... center line of windrow, j1 ... edge of turning inside of windrow,
g1, g2, g3, g4, g5 ... transmission gear, 1 ... mast frame, 10 ... hitch, 11 ... arm, 2 ... center frame, 3 ... axle frame, 30/31 ... wheels, 32 ...
Bracket, 320 ... Arm, 4 ... Rotor support frame, 40 ... Sliding arm, 5 ... Rake rotor, 50 ... Cam case, 51 ... Rake arm (control arm) 5
10 ... tine, 52 ... drive shaft, 6 ... grass row (windrow), 7 ... tie rod, 8 ... three-way gear box, 8a ...
Main body case, 8b ... Bearing support cylinder, 80 ... Output shaft, 81 ...
Intermediate shaft, 9 ... Lock mechanism, 90 ... Fixing member, 91 ... First
Fitting hole, 92 ... Lock pin, 920 ... Operation lever, 92
1 ... Locking step portion, 922 ... Guide tube portion, 93 ... Rotating link,
94 ... Second fitting hole.

Claims (2)

[Claims] 1. A mast frame 1 formed in a shape having an overhanging portion projecting rearward on the rear end side is connected to the rear of the body of the tractor T through a connecting hitch a, and the rear of the mast frame 1 is connected. A turning fulcrum A is provided at the left and right intermediate parts, and a front tie rod fulcrum D is provided at a part deviated to the left and right of the turning fulcrum A, and left and right rake rotors 5 and 5 are provided at the front and rear intermediate parts. A center frame 2 for supporting a front end portion of the fulcrum so as to be pivotable right and left to the pivot fulcrum A.
The rear end portion is connected to the left and right intermediate portions on the front end side of the axle frame 3 so as to be freely turnable left and right to a rear turning fulcrum B provided at a position displaced forward from the axis of the left and right wheels 30 and 31. The axle frame 3 is provided with a rear tie rod fulcrum C on the front end side at a position deviated to the other side to the left and right with respect to the rear fulcrum fulcrum B, and this fulcrum C and the front tie rod provided on the mast frame 1 are provided. A steering mechanism in a weeding machine, characterized in that a tie rod 7 is bridged between the fulcrum D and the left and right side portions of the axle frame 3 to allow the wheels 30 and 31 to idle. 2. A fixing member 90 integrally connected to the rear end portion of the center frame 2 is provided, a swing link 93 is provided at the rear swing fulcrum B so as to freely swing around it, and on the axle frame 3 side. , A knock pin 92 that alternately fits into a first fitting hole 91 provided in the fixing member 90 and a second fitting hole 94 provided in the turning link 93 is provided.
The rear tie rod fulcrum C is provided on the
The steering mechanism in the grass catcher according to claim 1, wherein the rear end sides are connected.